CN107230758A - A kind of automobile batteries module with anti-seismic performance - Google Patents

A kind of automobile batteries module with anti-seismic performance Download PDF

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Publication number
CN107230758A
CN107230758A CN201710536041.6A CN201710536041A CN107230758A CN 107230758 A CN107230758 A CN 107230758A CN 201710536041 A CN201710536041 A CN 201710536041A CN 107230758 A CN107230758 A CN 107230758A
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CN
China
Prior art keywords
fixed
module
snap ring
bracket
battery core
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Granted
Application number
CN201710536041.6A
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Chinese (zh)
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CN107230758B (en
Inventor
任纯麟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
System Electronic Technology (zhenjiang) Co Ltd
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System Electronic Technology (zhenjiang) Co Ltd
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Priority to CN201710536041.6A priority Critical patent/CN107230758B/en
Publication of CN107230758A publication Critical patent/CN107230758A/en
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Publication of CN107230758B publication Critical patent/CN107230758B/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/62Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625Vehicles
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/656Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561Gases
    • H01M10/6563Gases with forced flow, e.g. by blowers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/656Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561Gases
    • H01M10/6566Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

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

Abstract

The present invention relates to a kind of automobile batteries module with anti-seismic performance, including module bottom plate, module cover lid, battery core bracket and battery core, battery core is fixed in battery core bracket, and battery core bracket is fixed on module bottom plate, and module cover lid, which is covered, to be fixed on module bottom plate;The battery core bracket includes upper bracket, lower bracket and supporting mechanism, upper bracket and lower bracket are oppositely arranged, upper clamping ring and lower clamping ring are corresponded, single battery core is corresponding to be fixed between clamping ring and lower clamping ring, is fixed between upper fixed frame and lower fixed frame by bolt, supporting mechanism is fixed between upper junction plate and lower connecting plate, improve the safety coefficient of module, module and whole battery bag, meanwhile, it is easy for installation, with good vibration resistance performance.

Description

A kind of automobile batteries module with anti-seismic performance
Technical field
The invention belongs to a kind of battery modules, and in particular to a kind of automobile batteries module with anti-seismic performance.
Background technology
In battery bag, occur explosion time in single battery core, battery core positive pole moment sprays core, and produces HTHP, this When original battery core bracket due to not possessing venting of dust explosion groove, it is impossible to effectively by heat and pressure venting, cause blast battery core around And the relative battery core steep temperature rise of this blast battery core positive pole, battery core is impaired even to scrap, and it is hidden that whole battery bag can also have safety Suffer from.
The content of the invention
The present invention proposes a kind of automobile batteries module with anti-seismic performance regarding to the issue above, improves module, module And the safety coefficient of whole battery bag, meanwhile, it is easy for installation, with good vibration resistance performance.
Specific technical scheme is as follows:
A kind of automobile batteries module with anti-seismic performance, including module bottom plate, module cover lid, battery core bracket and battery core, Battery core is fixed in battery core bracket, and battery core bracket is fixed on module bottom plate, and module cover lid, which is covered, to be fixed on module bottom plate;Institute Battery core bracket is stated including upper bracket, lower bracket and supporting mechanism, the upper bracket include upper snap ring, upper junction plate and on Fixed frame, upper snap ring is cirque structure, and two upper snap ring longitudinal arrangements form snap ring group, some upper snap ring groups laterally according to Being fixed among fixed frame for secondary arrangement, is connected between two adjacent upper snap ring groups by upper junction plate;Under described Portion's support includes lower snap ring, lower connecting plate and lower fixed frame, and lower snap ring is cirque structure, two lower snap ring longitudinal arrangement shapes Into ring group up and down, under being fixed on that some lower snap ring groups are laterally arranged in order among fixed frame, two adjacent lower snap ring groups Between be connected by lower connecting plate, lower snap ring, lower connecting plate and lower fixed frame are each attached on module bottom plate;The upper card The internal diameter of ring and lower snap ring is equal, and the inwall of lower snap ring is provided with a circle rubber washer, and the upper card adapter plate and lower card adapter plate are equal Including clamping plate body, clamping plate body is square structure, its four edges are respectively equipped with the first of a sector structure and fixed Groove, four the first fixing grooves are fixedly connected with four upper snap rings or four lower snap rings respectively, and the center of card adapter plate is provided with fixation Three the second fixing grooves are equipped with the upper surface of passage, the lower surface of upper card adapter plate and lower card adapter plate, the second fixing groove is uniform Respectively at the outer rim of fixed passage;
The upper bracket and lower bracket are oppositely arranged, and upper clamping ring and lower clamping ring are corresponded, single battery core pair That answers is fixed between clamping ring and lower clamping ring, is fixed between upper fixed frame and lower fixed frame by bolt, Supporting mechanism is fixed between upper junction plate and lower connecting plate;
The supporting mechanism includes supporting mechanism main body, upper clamping terminal and lower clamping terminal, and supporting mechanism main body is just Quadrangular structure, four side walls of supporting mechanism main body cave inward to form the locating slot of arc-shaped structure, supporting mechanism main body Upper and lower ends be respectively equipped with mirror image on a first grafting passage, the first grafting conduit wall provided with two the second grafting chambers, A regulation chamber is respectively equipped with two side walls of the second grafting chamber, regulation intracavitary is fixed a regulation terminal by spring, adjusted Through adjusting, cavity wall is telescopic to be arranged in the second grafting chamber section terminal;The upper clamping terminal and lower clamping terminal include The outer clip-connecting rod and interior clip-connecting rod of cylindrical structure, the external diameter of interior clip-connecting rod are more than the external diameter of outer clip-connecting rod, interior clip-connecting rod and the One grafting path clearance coordinates, and the outer wall of interior clip-connecting rod is provided with two adjustable plates, and interior clip-connecting rod is plug-type to be arranged on first In grafting passage, two adjustable plates are respectively equipped with two the second grafting chambers, and the thickness h 1 of adjustable plate is less than the second grafting chamber Width L1, outer inserting column and fixed passage interference fit are uniformly provided with three first fixation projections on outer inserting column, first consolidates Determine projection and the second fixing groove is interference fitted;The upper clamping terminal of supporting mechanism and lower clamping terminal is plug-type respectively is fixed on Cavity between, supporting mechanism main body can prolong axle center and carry out reducible rotate for upper junction plate and lower company.
A kind of above-mentioned automobile batteries module with anti-seismic performance, wherein, the module cover covers logical provided with some first Air port, the aperture of the first ventilating opening is d1, and the medial extremity of the first ventilating opening is provided with a plug mouth, and what plug mouth was interference fitted is fixed on In first ventilating opening, plug mouth is provided with the second ventilating opening, and the internal diameter of the second ventilating opening is d2, d1=3*d2.
A kind of above-mentioned automobile batteries module with anti-seismic performance, wherein, it is provided with and its bottom in the supporting mechanism main body The main venting channels that portion is connected, main venting channels are provided with some branch venting channels being connected respectively with four locating slots, The lower clamping terminal is provided with first passage, and first passage is connected with main venting channels, and the module bottom plate is provided with the Two passages, second channel is connected by some third channels with first passage, and second channel is used for into supporting mechanism main body It is passed through cold air.
A kind of above-mentioned automobile batteries module with anti-seismic performance, wherein, the thickness of the rubber washer is 0.5-2mm.
A kind of above-mentioned automobile batteries module with anti-seismic performance, wherein, the regulation terminal is cylindrical structure, regulation Terminal is provided with a circle postive stop baffle.
Beneficial effects of the present invention are:
Upper bracket and lower bracket spicing forming type of the present invention, some supporting mechanisms are fixed therebetween, each relative It is used for clamping battery core between the upper snap ring and lower snap ring that should set, supporting mechanism main body can carry out rotation by a small margin, it is possible to Resetted in the presence of regulation terminal, stability is good, and damping performance is good, and second channel is passed through cold sky into supporting mechanism main body Gas, effectively can make battery core cool, effectively explosion-proof, have a safety feature;In summary, the present invention can improve module, module with And the safety coefficient of whole battery bag, meanwhile, it is easy for installation, with good vibration resistance performance.
Brief description of the drawings
Fig. 1 is sectional view of the present invention.
Fig. 2 is upper bracket upward view of the present invention.
Fig. 3 is lower bracket top view of the present invention.
Fig. 4 is supporting mechanism sectional view of the present invention.
Fig. 5 is supporting mechanism main structure chart of the present invention.
Fig. 6 is A-A directions sectional view in Fig. 4 of the present invention.
Fig. 7 is upper junction plate of the present invention/lower connecting plate structure chart.
Fig. 8 is B portions of the present invention enlarged drawing.
Embodiment
To make technical scheme become apparent from clearly, the present invention is described further below in conjunction with the accompanying drawings, It is any that guarantor of the present invention is each fallen within to the scheme that the technical characteristic progress equivalencing of technical solution of the present invention and conventional reasoning are drawn Protect scope.
Reference
Upper bracket 1, lower bracket 2, supporting mechanism 3, upper snap ring 4, upper junction plate 5, upper fixed frame 6, lower snap ring 7, Lower connecting plate 8, lower fixed frame 9, rubber washer 11, clamping plate body 12, the first fixing groove 13, fixed passage 14, second are fixed Groove 15, supporting mechanism main body 16, upper clamping terminal 17, lower clamping terminal 18, locating slot 19, the first grafting passage 20, second are inserted Connect chamber 21, regulation chamber 22, spring 23, regulation terminal 24, postive stop baffle 25, outer clip-connecting rod 26, interior clip-connecting rod 27, adjustable plate 28, First fixes projection 29, main venting channels 30, branch venting channels 31, first passage 32, second channel 33, third channel 34, mould Group bottom plate 35, module cover lid 36, battery core 37, the first ventilating opening 38, plug mouth 39, the second ventilating opening 40.
A kind of automobile batteries module with anti-seismic performance, including module bottom plate 35, module cover lid 36, battery core as shown in the figure Support and battery core 37, battery core is fixed in battery core bracket, and battery core bracket is fixed on module bottom plate, and module cover lid, which is covered, to be fixed on On module bottom plate, the module cover is covered provided with some first ventilating openings 38, and the aperture of the first ventilating opening is d1, the first ventilating opening Medial extremity provided with one plug mouth 39, plug mouth interference fit is fixed in the first ventilating opening, plug mouth be provided with the second ventilating opening 40, the internal diameter of the second ventilating opening is d2, d1=3*d2;The battery core bracket includes upper bracket 1, lower bracket 2 and support machine Structure 3, the upper bracket includes upper snap ring 4, upper junction plate 5 and upper fixed frame 6, and upper snap ring is on cirque structure, two Snap ring longitudinal arrangement forms snap ring group, and what some upper snap ring groups were laterally arranged in order is fixed among fixed frame, adjacent Two upper snap ring groups between be connected by upper junction plate;The lower bracket includes lower snap ring 7, lower connecting plate 8 and lower solid Determine framework 9, lower snap ring is ring group above and below cirque structure, two lower snap ring longitudinal arrangements formation, some lower snap ring groups laterally according to Under being fixed on of secondary arrangement among fixed frame, it is connected between two adjacent lower snap ring groups by lower connecting plate, lower snap ring, Lower connecting plate and lower fixed frame are each attached on module bottom plate;The internal diameter of the upper snap ring and lower snap ring is equal, lower snap ring Inwall is provided with a circle rubber washer 11, and the thickness of the rubber washer is 0.5-2mm, and the upper card adapter plate and lower card adapter plate are equal Including clamping plate body 12, clamping plate body is square structure, its four edges are respectively equipped with the first of a sector structure and consolidated Determine groove 13, four the first fixing grooves are fixedly connected with four upper snap rings or four lower snap rings respectively, and the center of card adapter plate is provided with Three the second fixing grooves 15 are equipped with the upper surface of fixed passage 14, the lower surface of upper card adapter plate and lower card adapter plate, second consolidates Determine groove uniformly fixing at the outer rim of passage respectively;
The upper bracket and lower bracket are oppositely arranged, and upper clamping ring and lower clamping ring are corresponded, single battery core pair That answers is fixed between clamping ring and lower clamping ring, is fixed between upper fixed frame and lower fixed frame by bolt, Supporting mechanism is fixed between upper junction plate and lower connecting plate;
The supporting mechanism includes supporting mechanism main body 16, upper clamping terminal 17 and lower clamping terminal 18, supporting mechanism master Body is four-prism structure, and four side walls of supporting mechanism main body cave inward to form the locating slot 19 of arc-shaped structure, is positioned Groove is used to position battery core, and the upper and lower ends of supporting mechanism main body are respectively equipped with a first grafting passage 20, the first grafting passage Being provided with two the second grafting chambers 21, two side walls of the second grafting chamber for mirror image is respectively equipped with a regulation chamber 22 on wall, adjusts Section intracavitary fixes a regulation terminal 24 by spring 23, and through adjusting, cavity wall is telescopic to be arranged on the second grafting to regulation terminal In chamber, the regulation terminal is cylindrical structure, and regulation terminal is provided with a circle postive stop baffle 25;The upper clamping terminal is with Clamping terminal includes the outer clip-connecting rod 26 and interior clip-connecting rod 27 of cylindrical structure, and the external diameter of interior clip-connecting rod is more than outer clip-connecting rod External diameter, interior clip-connecting rod and the first grafting path clearance coordinate, and the outer wall of interior clip-connecting rod is provided with two adjustable plates 28, interior clip-connecting rod Plug-type to be arranged in the first grafting passage, two adjustable plates are respectively equipped with two the second grafting chambers, the thickness of adjustable plate Spend on the width L1 that h1 is less than the second grafting chamber, outer inserting column and fixed passage interference fit, outer inserting column and be uniformly provided with three First fixes projection 29, and first fixes projection and the second fixing groove interference fit;The upper clamping terminal of supporting mechanism and lower clamping Terminal is plug-type respectively to be fixed on upper junction plate and lower company cavity between, and it is reducible that supporting mechanism main body can prolong axle center progress Rotate.
Provided with the main venting channels 30 being connected with its bottom in the supporting mechanism main body, if main venting channels are provided with The dry branch venting channels 31 being connected respectively with four locating slots, the lower clamping terminal is provided with first passage 32, and first leads to Road is connected with main venting channels, and the module bottom plate is provided with second channel 33, and second channel passes through some third channels 34 It is connected with first passage, second channel is used to be passed through cold air into supporting mechanism main body.
Upper bracket and lower bracket spicing forming type of the present invention, some supporting mechanisms are fixed therebetween, each relative It is used for clamping battery core between the upper snap ring and lower snap ring that should set, supporting mechanism main body can carry out rotation by a small margin, it is possible to Resetted in the presence of regulation terminal, stability is good, and damping performance is good, and second channel is passed through cold sky into supporting mechanism main body Gas, effectively can make battery core cool, effectively explosion-proof, have a safety feature;In summary, the present invention can improve module, module with And the safety coefficient of whole battery bag, meanwhile, it is easy for installation, with good vibration resistance performance.

Claims (5)

1. a kind of automobile batteries module with anti-seismic performance, it is characterized in that, including module bottom plate, module cover lid, battery core bracket And battery core, battery core is fixed in battery core bracket, and battery core bracket is fixed on module bottom plate, and module cover lid, which is covered, is fixed on module bottom On plate;The battery core bracket includes upper bracket, lower bracket and supporting mechanism, and the upper bracket includes upper snap ring, upper company Fishplate bar and upper fixed frame, upper snap ring are cirque structure, and two upper snap ring longitudinal arrangements form snap ring group, some upper snap rings What group was laterally arranged in order is fixed among fixed frame, is connected between two adjacent upper snap ring groups by upper junction plate Connect;The lower bracket includes lower snap ring, lower connecting plate and lower fixed frame, and lower snap ring is cirque structure, two lower snap rings Under ring group above and below longitudinal arrangement formation, being fixed on that some lower snap ring groups are laterally arranged in order among fixed frame, adjacent two It is connected between individual lower snap ring group by lower connecting plate, lower snap ring, lower connecting plate and lower fixed frame are each attached to module bottom plate On;The internal diameter of the upper snap ring and lower snap ring is equal, the inwall of lower snap ring provided with a circle rubber washer, the upper card adapter plate and Lower card adapter plate includes clamping plate body, and clamping plate body is square structure, its four edges are respectively equipped with a sector structure The first fixing groove, four the first fixing grooves are fixedly connected with four upper snap rings or four lower snap rings respectively, the center of card adapter plate Place, which is provided with, fixes passage, and three the second fixing grooves, second are equipped with the upper surface of the lower surface of upper card adapter plate and lower card adapter plate Fixing groove is uniform to fix at the outer rim of passage respectively;
The upper bracket and lower bracket are oppositely arranged, and upper clamping ring and lower clamping ring are corresponded, and single battery core is corresponding It is fixed between clamping ring and lower clamping ring, is fixed between upper fixed frame and lower fixed frame by bolt, is supported Mechanism is fixed between upper junction plate and lower connecting plate;
The supporting mechanism includes supporting mechanism main body, upper clamping terminal and lower clamping terminal, and supporting mechanism main body is positive four rib Rod structure, four side walls of supporting mechanism main body cave inward to form the locating slot of arc-shaped structure, supporting mechanism main body it is upper Lower two ends be respectively equipped with mirror image on a first grafting passage, the first grafting conduit wall provided with two the second grafting chambers, second A regulation chamber is respectively equipped with two side walls of grafting chamber, regulation intracavitary fixes a regulation terminal, adjustable side by spring Through adjusting, cavity wall is telescopic to be arranged in the second grafting chamber son;The upper clamping terminal and lower clamping terminal include cylinder The outer clip-connecting rod and interior clip-connecting rod of body structure, the external diameter of interior clip-connecting rod are more than the external diameter of outer clip-connecting rod, and interior clip-connecting rod and first insert Path clearance cooperation is connect, the outer wall of interior clip-connecting rod is provided with two adjustable plates, and interior clip-connecting rod is plug-type to be arranged on the first grafting In passage, two adjustable plates are respectively equipped with two the second grafting chambers, and the thickness h 1 of adjustable plate is less than the width of the second grafting chamber Spend on L1, outer inserting column and fixed passage interference fit, outer inserting column and be uniformly provided with three first fixation projections, first fixes convex Block and the second fixing groove are interference fitted;The upper clamping terminal of supporting mechanism and lower clamping terminal plug-type company of being fixed on respectively Cavity between, supporting mechanism main body can prolong axle center and carry out reducible rotate for fishplate bar and lower company.
2. a kind of automobile batteries module with anti-seismic performance as claimed in claim 1, it is characterized in that, the module cover is covered Provided with some first ventilating openings, the aperture of the first ventilating opening is d1, and the medial extremity of the first ventilating opening is provided with a plug mouth, and plug is made a slip of the tongue It is full of being fixed in the first ventilating opening of cooperation, plug mouth is provided with the second ventilating opening, and the internal diameter of the second ventilating opening is d2, d1=3* d2。
3. a kind of automobile batteries module with anti-seismic performance as claimed in claim 1, it is characterized in that, the supporting mechanism master In vivo provided with the main venting channels being connected with its bottom, main venting channels are connected with four locating slots respectively provided with some Branch venting channels, the lower clamping terminal is provided with first passage, and first passage is connected with main venting channels, the module Bottom plate is provided with second channel, and second channel is connected by some third channels with first passage, and second channel is used for branch Cold air is passed through in support mechanism main body.
4. a kind of automobile batteries module with anti-seismic performance as claimed in claim 1, it is characterized in that, the rubber washer Thickness is 0.5-2mm.
5. a kind of automobile batteries module with anti-seismic performance as claimed in claim 1, it is characterized in that, the regulation terminal is Cylindrical structure, regulation terminal is provided with a circle postive stop baffle.
CN201710536041.6A 2017-07-04 2017-07-04 Automobile battery module with anti-seismic performance Active CN107230758B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201710536041.6A CN107230758B (en) 2017-07-04 2017-07-04 Automobile battery module with anti-seismic performance

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CN107230758B CN107230758B (en) 2023-06-23

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CN108565372A (en) * 2018-05-29 2018-09-21 深圳市统凌科技有限公司 A kind of entirety battery core bracket
CN108695468A (en) * 2018-05-22 2018-10-23 台州骊威环保科技有限公司 A kind of locking mechanism of the battery shock absorbing apparatus of new-energy automobile
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CN112234284A (en) * 2020-02-28 2021-01-15 蜂巢能源科技有限公司 Battery cell mounting rack, battery module, battery pack and vehicle
CN111864150A (en) * 2020-08-31 2020-10-30 深圳市昂佳科技有限公司 Lithium battery pack and preparation method thereof
CN111864150B (en) * 2020-08-31 2021-04-20 深圳市昂佳科技有限公司 Lithium battery pack and preparation method thereof

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