CN107240651A - The battery modules of electric automobile - Google Patents

The battery modules of electric automobile Download PDF

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Publication number
CN107240651A
CN107240651A CN201610178833.6A CN201610178833A CN107240651A CN 107240651 A CN107240651 A CN 107240651A CN 201610178833 A CN201610178833 A CN 201610178833A CN 107240651 A CN107240651 A CN 107240651A
Authority
CN
China
Prior art keywords
support
battery
electric automobile
cylinder manifold
battery modules
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610178833.6A
Other languages
Chinese (zh)
Inventor
吴施荣
张振
许浩
喻小明
巴静
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.)
Shenzhen OptimumNano Energy Co Ltd
Original Assignee
Shenzhen OptimumNano Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen OptimumNano Energy Co Ltd filed Critical Shenzhen OptimumNano Energy Co Ltd
Priority to CN201610178833.6A priority Critical patent/CN107240651A/en
Publication of CN107240651A publication Critical patent/CN107240651A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • H01M10/64Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643Cylindrical cells
    • 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
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6554Rods or plates
    • H01M10/6555Rods or plates arranged between the cells
    • 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
    • H01M50/50Current conducting connections for cells or batteries
    • 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)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention discloses a kind of battery modules of electric automobile, it includes the battery single mode group of at least two laid out in parallel, and the battery single mode group includes the fastener of multiple battery modules being cascaded, the connecting plate of the two neighboring battery module of connection, the screw rod that battery module is locked together and standing screw.The battery modules of electric automobile of the present invention have the advantage that:1) material, the quantity of mould, 2 are reduced) standardization, easily extension, 3) tear prescription open just, 4) conductive and heat-conductive speed is fast, internal resistance is small.

Description

The battery modules of electric automobile
【Technical field】
The present invention relates to new energy cell art, more particularly to a kind of battery modules of electric automobile.
【Background technology】
As energy problem and environmental problem are increasingly serious, country vigorously supports to new energy, and power Battery key technology it is increasingly mature, electrokinetic cell is widely used in automobile.In new energy field of batteries In, one of key technology of new-energy automobile development is electrokinetic cell, many degree shadows of performance of battery modules Ring battery bag even whole electric automobile performance.Battery pack currently for new-energy automobile requires more and more higher, High power capacity, high safety, low internal resistance, Quick conductive, convenient changing battery modules are following progressively perfect Direction.But many batteries do not have modularization at present, are difficult extension, disassemble there is inconvenience after sale, The both positive and negative polarity electric installation for connecing series battery is too complicated or apart from oversize, conductive and heat-transfer rate it is not fast enough and Conductive material internal resistance is big.
In consideration of it, real be necessary to provide a kind of battery modules of new electric automobile to overcome prior art not Foot.
【The content of the invention】
It is an object of the invention to provide a kind of modularization, tear open prescription just, conductive and heat-conductive speed is fast, internal resistance is small simultaneously And the battery modules of the simple electric automobile of assembling.
To achieve these goals, the invention provides a kind of battery modules of electric automobile, it is included at least The battery single mode group of two laid out in parallel, the battery single mode group include multiple battery modules being cascaded, Connect the connecting plate of two neighboring battery module, screw rod and standing screw that battery module is locked together Fastener.
Improved as a kind of the of battery modules of electric automobile of the present invention, the battery module include multiple battery cores, House the support of battery core, be assembled in the cylinder manifold of support, the support includes first support and first support The second support of cooperation, cylinder manifold includes being assembled in the first cylinder manifold of first support and is assembled in second Second cylinder manifold of frame, the first support is identical with second support structure, and the first cylinder manifold confluxes with second Hardened structure is identical.
Improved as a kind of the of battery modules of electric automobile of the present invention, the first support, second support are equal Including with relative first surface, the body of second surface, from the first surface of body extend it is multiple fixed Position post, locating dowel is provided with the through hole through body, the positioning of the locating dowel and second support of the first support Post is overlapped.
Improved as a kind of the of battery modules of electric automobile of the present invention, the first support, second support are equal Including being recessed and housing multiple host cavities of the battery core, the first surface from body from the first surface of body A pair of first snap fits of extension, a pair of first fixing muscles, the first snap fit of the first support, first are fixed Muscle the first fixing muscle respectively with the second support, the first snap fit are clasped.
Improved as a kind of the of battery modules of electric automobile of the present invention, the first support, second support are equal A pair second extended including multiple circular holes for being turned on one by one with the host cavity and from the second surface of body Snap fit, a pair of second fixing muscles, the electrode of the battery core are exposed to the circular hole, the two neighboring battery First support, the second support of module are fitted together, and the second snap fit of the first support, second are fixed Muscle the second fixing muscle respectively with the second support, the second snap fit are clasped.
Improved as a kind of the of battery modules of electric automobile of the present invention, first cylinder manifold, second are confluxed Plate is made by copper coin, and the multiple elastic portions, multiple on substrate extended including substrate, from substrate Mounting hole and the connecting portion extended from the edge bending of substrate, the elastic portion of first cylinder manifold abut institute The positive electrode of battery core is stated, the elastic portion of second cylinder manifold abuts the negative electrode of the battery core, the installation Hole is overlapped with the through hole of the first support, second support.
Improved as a kind of the of battery modules of electric automobile of the present invention, the connecting plate is made up of copper coin, is in Tabular and including multiple mounting holes, the connecting plate is located between the cylinder manifold of two neighboring battery module, The mounting hole of connecting plate is overlapped with the mounting hole of the cylinder manifold, and the screw rod passes through the installation of the connecting plate Hole, the mounting hole of cylinder manifold, first support, the through hole of second support.
Improved as a kind of the of battery modules of electric automobile of the present invention, the battery single mode group also includes assembling Sampling unit in the multiple battery module upper surface, the sampling unit includes substrate, bent from substrate edges The connection sheet of extension and the mounting hole on substrate, the screw rod pass through the mounting hole of the sampling unit.
Improved as a kind of the of battery modules of electric automobile of the present invention, the laid out in parallel battery single mode group Adjacent cylinder manifold links together.
Improved as a kind of the of battery modules of electric automobile of the present invention, it also includes that battery single mode will be assembled in The protection cap at group two ends, is assembled in the protective cover of the cylinder manifold junction of two battery single mode groups and is assembled in The peripheral bundling belt of battery single mode group.
Compared with prior art, the battery modules of electric automobile of the present invention have the advantage that:1) thing is reduced Material, the quantity of mould, 2) standardization, easily extension, 3) tear prescription open just, 4) conductive and heat-conductive speed is fast, interior Resistance is small.
【Brief description of the drawings】
Fig. 1 is the three-dimensional combination figure of the battery modules of electric automobile of the present invention.
Fig. 2 is the part isometric constitutional diagram of the battery modules of electric automobile of the present invention.
Fig. 3 is the three-dimensional combination figure of the battery module of the battery modules of electric automobile of the present invention.
Fig. 4 is the stereogram of the first support of the battery modules of electric automobile of the present invention.
Fig. 5 is the stereogram at another visual angle shown in Fig. 4.
Fig. 6 is the three-dimensional combination figure of two battery modules of the battery modules of electric automobile of the present invention.
Fig. 7 is three-dimensional exploded view shown in Fig. 6.
【Embodiment】
In order that the purpose of the present invention, technical scheme and advantageous effects become apparent from understanding, below in conjunction with The drawings and specific embodiments, the present invention will be described in further detail.It should be appreciated that this explanation Embodiment described in book is not intended to limit the present invention just for the sake of explaining the present invention.
As shown in figure 1, the battery modules 100 of electric automobile of the present invention include the electricity of at least two laid out in parallel Pond single mode group 1, protection cap 2, the bundling belt 4 of protective cover 3 and self-contained battery single mode group 1.
As shown in Figure 1, Figure 6, Figure 7, battery single mode group 1 include multiple battery modules 10 being cascaded, The connecting plate 20 that connects two neighboring battery module 10, the screw rod 30 for locking together battery module 10, The fastener (not shown) and sampling unit 40 of standing screw 30.
As shown in Fig. 3, Fig. 7, battery module 10 include multiple battery cores 11, house battery core 11 support with And it is assembled in the cylinder manifold of support.Support includes first support 21, the second support coordinated with first support 21 22, cylinder manifold includes being assembled in the first cylinder manifold 31 of first support 21 and is assembled in second support 22 Second cylinder manifold 32, first support 21 is identical with the structure of second support 22, and the first cylinder manifold 31 and second converges The stream structure of plate 32 is identical, and such design can reduce the quantity of mould, and the design of standardization is more easily extensible.
As shown in figure 4, first support 21 include with relative first surface, the body 210 of second surface, The multiple locating dowels 211 extended from the first surface of body 210, locating dowel 211 is provided with through body 210 Through hole 2110.A pair of first snap fits 212 that first support 21 also includes extending from the first surface of body 210, A pair of first fixing muscles 213.First support 21 also includes housing battery core from the first surface depression of body 210 11 multiple host cavities 214.
As shown in figure 5, body 210 is provided with the multiple circular holes 215 turned on one by one with host cavity 214 respectively, from And make the electrode of battery core 10 be exposed to circular hole 215.First support 21 also includes the second surface from body 210 A pair of second snap fits 216 of extension, a pair of second fixing muscles 217.
As shown in fig. 7, the first cylinder manifold 31 is made up of copper coin, it includes substrate 311, prolonged from substrate 311 The multiple elastic portions 312 stretched, multiple mounting holes 313 on substrate 311 and the edge from substrate 311 Bend the connecting portion 314 of extension.
During assembled battery module 10, first, multiple battery cores 11 are contained in the host cavity 214 of first support 21, The electrode of battery core 11 is exposed to the circular hole 215 of first support 21;Then, second support 22 is assembled in One support 21, the locating dowel 211 of first support 21 is overlapped with the locating dowel of second support 22, first support 21 the first snap fit 212, the first fixing muscle 213 the first fixing muscle respectively with second support, the first snap fit Buckle is fixed;Then, the first cylinder manifold 31, the second cylinder manifold 32 are assembled respectively, the first cylinder manifold 31 Elastic portion 312 abuts the positive electrode of battery core 11, and the elastic portion of the second cylinder manifold 32 abuts the negative electricity of battery core 11 Pole, the mounting hole 313 of the first cylinder manifold 31, the mounting hole of the second cylinder manifold 32 and first support 21 it is logical The through hole of hole 2110 and second support 22 is overlapped.
As shown in fig. 7, connecting plate 20 is made up of copper coin, in tabular, it includes multiple mounting holes 201. Connecting plate 20 be located at two neighboring battery module 10 cylinder manifold between, it is such design make connecting plate 20 with The connection distance of cylinder manifold is short, and conductive and heat-conductive speed is fast, and material is identical, reduces internal resistance.
As shown in Fig. 2 sampling unit 40 includes substrate 401, the connection sheet of extension is bent from the edge of substrate 401 402 and the mounting hole 403 on substrate 401.
During assembled battery single mode group 1, first, by the two neighboring assembled in series of battery module 10 together, even Fishplate bar 20 is located between two battery modules 10, and the first support 21 of two battery modules 10, second Frame 22 is fitted together, the second snap fit 216 of first support 21, the second fixing muscle 217 respectively with second Second fixing muscle of frame 22, the second snap fit buckle are fixed;Afterwards, by more battery modules 10 successively group It is fitted together;Then, sampling unit 40 is assembled in the upper surface of battery module 10;Finally, by screw rod 30 The mounting hole 313 of mounting hole 403, cylinder manifold, the through hole 2110 of support and connection through sampling unit 40 The mounting hole 201 of plate 20, is then fixed on screw rod 30 using fastener.
During assembled battery module 100, the two neighboring laid out in parallel of battery single mode group 1 confluxes adjacent Plate links together, and can be attached using connection sheet (not shown), so as to realize two battery single mode groups 1 Serial or parallel connection;Then, protection cap 2 is assembled in the two ends of battery single mode group 1, protective cover 3 is assembled In the cylinder manifold junction of two battery single mode groups 1;Finally, bundling belt 4 is assembled in battery single mode group 1 Periphery.
The battery modules of electric automobile of the present invention, using modularized design, reduce material, the quantity of mould, And the extension of all directions can be met, prescription is torn open just, conductive and heat-conductive speed is fast, internal resistance is small.
The battery modules of electric automobile of the present invention, are not restricted to described in specification and embodiment, Therefore additional advantage and modification are easily achieved for the personnel of familiar field, therefore without departing substantially from power In the case of the spirit and scope for the universal that profit is required and equivalency range is limited, the present invention is not limited to Specific details, representational equipment and shown here as the examples shown with description.

Claims (10)

1. a kind of battery modules of electric automobile, it is characterised in that:It includes the electricity of at least two laid out in parallel Pond single mode group, the battery single mode group includes multiple battery modules being cascaded, connects two neighboring electricity The fastener of the connecting plate of pond module, the screw rod that battery module is locked together and standing screw.
2. the battery modules of electric automobile as claimed in claim 1, it is characterised in that:The battery module Including multiple battery cores, the support of collecting battery core, the cylinder manifold for being assembled in support, the support includes first Frame, with first support coordinate second support, cylinder manifold include be assembled in the first cylinder manifold of first support with And the second cylinder manifold of second support is assembled in, the first support is identical with second support structure, and first converges Flow plate identical with the second cylinder manifold structure.
3. the battery modules of electric automobile as claimed in claim 2, it is characterised in that:The first support, Second support includes prolonging with relative first surface, the body of second surface, from the first surface of body The multiple locating dowels stretched, locating dowel is provided with the through hole through body, the locating dowel of the first support and second The locating dowel of support is overlapped.
4. the battery modules of electric automobile as claimed in claim 3, it is characterised in that:The first support, Second support includes from the first surface of body depression and houses multiple host cavities of the battery core, from body First surface extension a pair of first snap fits, a pair of first fixing muscles, the first snap fit of the first support, First fixing muscle the first fixing muscle respectively with the second support, the first snap fit are clasped.
5. the battery modules of electric automobile as claimed in claim 4, it is characterised in that:The first support, Second support includes the multiple circular holes turned on one by one with the host cavity and extended from the second surface of body A pair of second snap fits, a pair of second fixing muscles, the electrode of the battery core is exposed to the circular hole, the phase First support, the second support of adjacent two battery modules are fitted together, the second snap fit of the first support, Second fixing muscle the second fixing muscle respectively with the second support, the second snap fit are clasped.
6. the battery modules of electric automobile as claimed in claim 5, it is characterised in that:Described first confluxes Plate, the second cylinder manifold are made by copper coin, and including substrate, from substrate extend multiple elastic portions, be located at Multiple mounting holes on substrate and the connecting portion of the edge bending extension from substrate, first cylinder manifold Elastic portion abuts the positive electrode of the battery core, and the elastic portion of second cylinder manifold abuts the negative electricity of the battery core Pole, the mounting hole is overlapped with the through hole of the first support, second support.
7. the battery modules of electric automobile as claimed in claim 6, it is characterised in that:The connecting plate by Copper coin is made, and in tabular and including multiple mounting holes, the connecting plate is located at two neighboring battery module Between cylinder manifold, the mounting hole of connecting plate is overlapped with the mounting hole of the cylinder manifold, and the screw rod is described in The mounting hole of connecting plate, the mounting hole of cylinder manifold, first support, the through hole of second support.
8. the battery modules of electric automobile as claimed in claim 7, it is characterised in that:The battery single mode Group also includes being assembled in the sampling unit of the multiple battery module upper surface, the sampling unit include substrate, from The connection sheet and the mounting hole on substrate of substrate edges bending extension, the screw rod pass through the sampling The mounting hole in portion.
9. the battery modules of electric automobile as claimed in claim 8, it is characterised in that:The laid out in parallel The adjacent cylinder manifold of battery single mode group links together.
10. the battery modules of electric automobile as claimed in claim 9, it also includes that battery list will be assembled in The protection cap at module two ends, is assembled in protective cover and the assembling of the cylinder manifold junction of two battery single mode groups In the peripheral bundling belt of battery single mode group.
CN201610178833.6A 2016-03-27 2016-03-27 The battery modules of electric automobile Pending CN107240651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610178833.6A CN107240651A (en) 2016-03-27 2016-03-27 The battery modules of electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610178833.6A CN107240651A (en) 2016-03-27 2016-03-27 The battery modules of electric automobile

Publications (1)

Publication Number Publication Date
CN107240651A true CN107240651A (en) 2017-10-10

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109256506A (en) * 2018-10-23 2019-01-22 广东电将军能源有限公司 A kind of battery modules
CN109435665A (en) * 2018-12-12 2019-03-08 远东福斯特新能源有限公司 Automobile batteries is used with the bayonet arrangement holder device that can avoid side core-pulling
CN110364656A (en) * 2019-07-19 2019-10-22 珠海银隆电器有限公司 A kind of PACK case and preparation method thereof
WO2023182981A1 (en) * 2022-03-22 2023-09-28 Coulomb Solutions, Inc. Electric vehicle battery module
WO2023182979A1 (en) * 2022-03-22 2023-09-28 Coulomb Solutions, Inc. Electric vehicle battery module
WO2023182980A1 (en) * 2022-03-22 2023-09-28 Coulomb Solutions, Inc. Modular chassis for an electric vehicle

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CN102723524A (en) * 2012-06-08 2012-10-10 欣旺达电子股份有限公司 Cylindrical power battery module structure
CN103378335A (en) * 2012-04-12 2013-10-30 庄嘉明 Battery pack with multiple parallel cells and power supply assembly with multiple battery packs connected in series
CN104576994A (en) * 2014-12-19 2015-04-29 广东亿纬赛恩斯新能源系统有限公司 Battery grouping structure and battery pack comprising same
CN105226211A (en) * 2015-08-25 2016-01-06 东南大学 A kind of split mounting type battery module and battery pack thereof
WO2016031208A1 (en) * 2014-08-27 2016-03-03 パナソニックIpマネジメント株式会社 Cell module and cell pack
CN205081155U (en) * 2015-10-30 2016-03-09 郑州比克新能源汽车有限公司 Power battery module equipment box for electric motor car
CN205609617U (en) * 2016-03-27 2016-09-28 深圳市沃特玛电池有限公司 Electric automobile's battery module

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103378335A (en) * 2012-04-12 2013-10-30 庄嘉明 Battery pack with multiple parallel cells and power supply assembly with multiple battery packs connected in series
CN102723524A (en) * 2012-06-08 2012-10-10 欣旺达电子股份有限公司 Cylindrical power battery module structure
WO2016031208A1 (en) * 2014-08-27 2016-03-03 パナソニックIpマネジメント株式会社 Cell module and cell pack
CN104576994A (en) * 2014-12-19 2015-04-29 广东亿纬赛恩斯新能源系统有限公司 Battery grouping structure and battery pack comprising same
CN105226211A (en) * 2015-08-25 2016-01-06 东南大学 A kind of split mounting type battery module and battery pack thereof
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CN205609617U (en) * 2016-03-27 2016-09-28 深圳市沃特玛电池有限公司 Electric automobile's battery module

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109256506A (en) * 2018-10-23 2019-01-22 广东电将军能源有限公司 A kind of battery modules
CN109256506B (en) * 2018-10-23 2023-12-08 广东电将军能源有限公司 Battery module
CN109435665A (en) * 2018-12-12 2019-03-08 远东福斯特新能源有限公司 Automobile batteries is used with the bayonet arrangement holder device that can avoid side core-pulling
CN109435665B (en) * 2018-12-12 2021-05-25 江西远东电池有限公司 Bayonet structure support device capable of avoiding side core pulling for automobile battery
CN110364656A (en) * 2019-07-19 2019-10-22 珠海银隆电器有限公司 A kind of PACK case and preparation method thereof
WO2023182981A1 (en) * 2022-03-22 2023-09-28 Coulomb Solutions, Inc. Electric vehicle battery module
WO2023182979A1 (en) * 2022-03-22 2023-09-28 Coulomb Solutions, Inc. Electric vehicle battery module
WO2023182980A1 (en) * 2022-03-22 2023-09-28 Coulomb Solutions, Inc. Modular chassis for an electric vehicle
US11840137B2 (en) 2022-03-22 2023-12-12 Coulomb Solutions, Inc. Electric vehicle battery module
US12097756B2 (en) 2022-03-22 2024-09-24 Coulomb Solutions, Inc. Electric vehicle battery module

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Application publication date: 20171010