CN105977427A - Power battery pack with buffer function - Google Patents

Power battery pack with buffer function Download PDF

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Publication number
CN105977427A
CN105977427A CN201610592660.2A CN201610592660A CN105977427A CN 105977427 A CN105977427 A CN 105977427A CN 201610592660 A CN201610592660 A CN 201610592660A CN 105977427 A CN105977427 A CN 105977427A
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CN
China
Prior art keywords
pallet
battery pack
pin
power battery
hole
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.)
Granted
Application number
CN201610592660.2A
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Chinese (zh)
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CN105977427B (en
Inventor
倪晖
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Huizhou Zhongyuan New Energy Co ltd
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Individual
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Priority to CN201610592660.2A priority Critical patent/CN105977427B/en
Publication of CN105977427A publication Critical patent/CN105977427A/en
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Publication of CN105977427B publication Critical patent/CN105977427B/en
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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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00Arrangement or mounting of electrical propulsion units
    • B60K1/04Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • 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

Abstract

The invention discloses a power battery pack which has a buffer function and is used for solving the problems that an existing battery pack generates deformation and burning explosion in the collision process. The power battery pack comprises a battery shell assembly in which a battery core component is contained. The power battery pack is characterized in that a first tray, a second tray, a third tray, a torsional spring, a first deformation strip, a second deformation strip, a deformation plate and safety pins are further included, wherein the first tray and the second tray are connected through the safety pins, the torsional spring, the first deformation strip and the second deformation strip, the second tray and the third tray are connected through the deformation plate, and collision energy is absorbed in a deformation mode in the collision process. According to the power battery pack, an internal structure of an existing battery is not changed, but an installation structure of the battery component is changed, more effective buffer absorption to the collision force is achieved by absorbing the collision energy in the vehicle collision process, maintenance is convenient, and the maintenance cost is reduced.

Description

There is the power battery pack of pooling feature
Technical field
This invention relates to electrokinetic cell and the technique for fixing field thereof used in new-energy automobile, specifically There is the power battery pack of pooling feature.
Background technology
Along with the pollution that energy scarcity, petroleum price rise, urban environment are the most serious, for petroleum replacing product New energy development being paid attention to by national governments increasingly, at vehicular field, pure electronic, hybrid power vapour Car will become the inexorable trend of future automobile industry development.At New-energy electric vehicle, hybrid vehicle body System, electrokinetic cell system is its indispensable important component part, but, power system of electric automobile is (dynamic Power battery bag) safety govern the fast development of electric automobile, along with vehicles number more and more always Huge, taking place frequently of vehicle accident, the security reliability of electric automobile power battery bag is required more and more higher.
In the structure of present stage electrokinetic cell bag, it is mainly by casing and the battery that is fixedly installed in casing Unit is constituted, and battery unit is by by multiple cylindrical electrical cores being fixed on side by side on battery core fixed mount or square electric cell Constituting, in the structure shown here, battery unit is all the most regular arranged in parallel in casing, this Kind be arranged in after vehicle is clashed into cannot buffering collision of closed dynamics, battery core is easy to lead after directly being clashed into Send a telegraph the dislocation of core inner pole piece and send out into short circuit, directly clash into and be also easy to cause battery core electrolyte to leak.
In new forms of energy car, the cost of lithium battery accounts for 1st/to two/3rd of integral vehicle cost, belongs to How the core resource of vehicle, therefore, alleviate frontal impact in vehicle accident, power that side impact brings The damage problem of battery component is to be badly in need of solving.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention provides the power battery pack with pooling feature, solve The problem that certainly existing battery component is susceptible to deformation after collision, fires, makes rehabilitation cost drop simultaneously Low.
The technical solution adopted for the present invention to solve the technical problems is:
There is the power battery pack of pooling feature, including the internal battery container assembly containing battery assembly, It is characterized in that, also include the first pallet, the second pallet, the 3rd pallet, torsion spring, the first modified strip, Two modified strip, deformed plate and safety pin, wherein,
Described battery container assembly is arranged on the upside of the first pallet, and the upper surface of the first pallet is provided with one The individual groove for battery container assembly location, and on battery container assembly by intersected with each other laterally and Longitudinal press strip compresses;
Four corners of the first pallet are provided with the first pin hole, and described pin hole is through hole;First The lower surface of pallet arranges a lead downwardly extended near corner, left front, and on lead Be nested with a torsion spring, described torsion spring performance indications meet angle--loading ratio is 45 degree--1 ton;Away from guiding First pallet lower surface of post is provided with a slide protrusion, and described slide protrusion is for being fixed on the first pallet Cylinder;
Second pallet is set in the lower section of the first pallet, wherein, described second pallet is provided with and lead The circular hole coordinated, described torsion spring and lead are inserted in circular hole, and are provided with an expansion in the bottom of circular hole Hole, and a blind flange is set at reaming, described torsion spring lower end is inserted in the slot of blind flange, is leading Be provided with a flange to the bottom of post, the diameter of described flange is bigger than the diameter of lead;
Four corners of the second pallet are provided with the second pin hole, and described second pin hole are blind hole, Described first, second pin hole is correspondingly arranged, and inserts a safety pin in every pair of first, second pin-and-hole;
Described second pallet away from being provided with an arc chute on the upper surface of circular hole, described arc chute with Described circular hole is that the center of circle is configured, and is provided with two symmetrically arranged first deformation in described arc chute Bar and the second modified strip, the two ends of described first, second modified strip are positioned at the two ends of arc chute and in centre Position contacts with slide protrusion simultaneously, and described slide protrusion is slidably matched with arc chute forming curves;Described The first modified strip and the second modified strip be aluminium alloy modified strip, there is certain elasticity and acutely rush in the external world Occurring in the case of hitting to compress completely and pulverize, dynamics of pulverizing is not less than 0.5 ton;
It is attached by corrugated deformed plate between described second pallet and the 3rd pallet, and described deformation Wave direction in plate is arranged along direction that automobile is advanced, and the surrounding of the 3rd pallet is provided with bolt peace Dress hole.
Further, the cooperation face of described slide protrusion and arc chute is T-shaped chute.
Further, battery container assembly includes metal shell, battery assembly and output electrode, wherein, Described metal shell is square or cuboid, and described battery assembly is embedded in metal shell, output electricity Pole is positioned at metal shell top, and output electrode described in two is arranged according to diagonal angle.
Further, described first pallet is a square plate.
Further, described safety pin is engineering plastics pin, is provided with a breach in the middle part of described safety pin, And this engineering plastics pin breach after such insertion falls just at the faying surface of first, second pin hole, and breach Towards vehicle body side.
Further, described first, second, third pallet is all flat aluminium alloy plate, and described deformed plate is aluminum Alloy components.
The invention has the beneficial effects as follows: use technical scheme, existing inside battery structure is not being had There is change, but by changing the mounting structure of battery component, during Vehicular impact, by absorbing The energy clashed into, it is achieved that snubber more efficiently to impact force, can pass through during follow-up maintenance The mode changing non-battery assembly is keeped in repair, and reduces loss.
Accompanying drawing explanation
Fig. 1 is one of schematic diagram of the present invention.
Fig. 2 is the two of the schematic diagram of the present invention.
Fig. 3 is the layout of battery container and battery.
Fig. 4 is the axonometric chart of the present invention.
Fig. 5 is the lateral plan of the present invention.
Fig. 6 is the top view of the present invention.
Fig. 7 is A--A sectional view in Fig. 6.
Fig. 8 is dismounting view.
Fig. 9 is the improvement schematic diagram of Fig. 7.
Figure 10 is frontal impact process schematic.
Figure 11 is side impact schematic diagram.
Figure 12 is the axonometric chart of safety pin.
In figure: 1 first pallet, 11 grooves, 12 press strips, 13 first pin holes, 14 leads, 15 is sliding Dynamic projection, 16 blind flanges, 17 flanges, 2 second pallets, 21 circular holes, 22 second pin holes, 23 arcs Chute, 24T shape chute, 25 slide protrusion installation reamings, 3 the 3rd pallets, 31 bolt mounting holes, 4 torsion springs, 51 first modified strip, 52 second modified strip, 6 deformed plates, 7 safety pins, 8 battery container assemblies, 81 gold medals Belong to housing, 82 battery assemblies, 83 output electrodes.
Detailed description of the invention
As shown in Figures 1 to 12, for existing defect, the protection main body of the present invention is as follows:
Exploitation is a kind of for the device in new-energy automobile protected the electrokinetic cells such as accumulator, especially It is, during automobile is violently shaken, it is to avoid battery be violently shaken be distorted, deformation etc. Problem.
Its basic principle is, automobile is after being clashed, according to impact site and crash direction not With, it is different for the impulsive force of battery, such as, in automobile frontal impact, owing to speed is high, Clashing into fiercely impact to battery maximum, it is excellent that the design of current main flow is all that the layout to battery is carried out Changing, and battery is integrally fixed in battery container, impact does not the most release, and causes the limb of battery component Solve, and then cause deflagration accident having.
In automobile side clashes into, speed is the highest, but owing to battery is in fore-and-aft direction superposition, laterally On combination dynamics more weak, battery still can be occurred to misplace, cause battery electrode connection points to be short-circuited, Detonation, blast, therefore the present invention seeks to by electrokinetic cell is carried out global optimization, it is provided that a kind of more preferable Solution.Its abridged edition thinking is, solve battery component in the impact in front, side and oblique direction, Absorb impulsive force, the impulsive force of battery itself is reduced to original 1/3rd, is effectively protected battery, keep away Exempt to be short-circuited, detonation and explosion accident.
Based on the description above, the power battery pack structure that the present invention provides is as follows:
Including the internal battery container assembly 8 containing battery, and it is used for what battery container assembly was fixed First pallet the 1, second pallet the 2, the 3rd pallet 3, torsion spring the 4, first modified strip the 51, second modified strip 52, Deformed plate 6 and safety pin 7, be described in detail each structure separately below.
Battery container assembly 8 includes metal shell 81, battery assembly 82 and output electrode 83, wherein, Metal shell 81 is typically designed as square, or class cuboid, and battery assembly 82 is embedded in metal-back In body 81, output electrode 83 is positioned at top, and including positive and negative electrode, wherein positive and negative electrode is tried one's best according to diagonal angle Arrange so that distance zooms out, reduce the probability of short circuit.
Above-mentioned battery container assembly 8 is arranged on the first pallet 1, and the first pallet 1 is a square plate, It is provided with a groove 11 for battery container assembly location, this groove at the upper surface of the first pallet 1 Coordinate with the bottom of above-mentioned battery container assembly, and by intersected with each other on battery container assembly Horizontal and vertical press strip 12 compresses, and uses trip bolt that above-mentioned press strip 12 two ends are fastened on first The edge of pallet 1.
Four corners of the first pallet 1 are provided with the first pin hole 13, and this pin hole is through hole.
In the lower surface of the first pallet 1, a lead downwardly extended is set near corner, left front 14, and on lead, it is nested with a torsion spring 4, this torsion spring 4 uses high pulling torque torsion spring, and its performance indications are basic Meet be angle--loading ratio is 45 degree--1 ton, be provided with at the first pallet lower surface away from lead 14 One slide protrusion 15, this slide protrusion 15 is the cylinder being fixed on the first pallet 1.
Arrange in the lower section of the first pallet 1 for the second pallet 2, wherein, the second pallet 2 is provided with The circular hole 21 that lead coordinates, above-mentioned torsion spring 4 and lead 14 be inserted in circular hole 21, and at circular hole Bottom be provided with a reaming, and a blind flange 16 is set at reaming, above-mentioned torsion spring lower end is inserted in In the slot of blind flange 16, it is provided with a flange 17 in the bottom of lead 14, the diameter ratio of this flange The diameter of lead is bigger, prevents the first pallet 1 from coming off.
Four corners of the second pallet 2 are provided with the second pin hole 22, and the second above-mentioned pin hole is Blind hole, first, second above-mentioned pin hole is correspondingly arranged, and inserts one in every pair of first, second pin-and-hole Safety pin 7.
This safety pin 7 uses engineering plastics pin, and is provided with a breach 71 on engineering plastics pin, and should Engineering plastics pin breach after such insertion falls just at the faying surface of first, second pin hole, and breach towards Side, with reference to Figure 12.For ensureing that safety pin does not loosens, above-mentioned safety pin and the first pin hole and the second pin Use interference fit between nail, and loosen groove 72 in surface configuration.
Under normal circumstances, due to the locking effect of four safety pins 7, between the first pallet and the second pallet it is Being fastened to each other, do not have the vibration of battery case shell, the vibration effectively preventing electrode from getting an electric shock takes off Fall.
During hard hit, after safety pin fractures, the deformation of modified strip is relied on to absorb energy.
The upper surface away from circular hole of the second pallet 2 is provided with an arc chute 23, arc chute 23 are configured with above-mentioned circular hole 21 for the center of circle, and should be provided with two symmetries in this arc chute 23 The first modified strip 51 and the second modified strip 52 arranged, the first described modified strip and the second modified strip are that aluminum closes Gold modified strip, has certain elasticity, and occur to compress completely in the case of extraneous severe impact have from Ruining function, this self-destruction dynamics is at about 0.5 ton, i.e. when the self-destruction dynamics being carried in modified strip is close to 0.5 ton Time, there is self-destruction, apparatus with shock absorbing.The two ends of first, second above-mentioned modified strip are positioned at arc chute The two ends of 23, and contact in centre position, form the slide construction carrying out coordinating with slide protrusion.
3rd pallet 3 is also installing plate, uses flat aluminium alloy plate, is provided with on the 3rd pallet of aluminium alloy Corrugated deformed plate 6, this deformed plate 6 is Al-alloy parts, with the second pallet and the 3rd by the way of welding Pallet is attached.And the surrounding of the 3rd pallet 3 is provided with bolt mounting holes 31, for and new forms of energy car Vehicle frame is attached.
Further, the cooperation face of slide protrusion and arc chute is T-shaped chute 24, with reference to Fig. 9.
The mode that above-mentioned slide protrusion and lead are threaded connection is attached with the first pallet.
One slide protrusion is set in one end of arc chute reaming 25 is installed, for the installation of slide protrusion, With reference to Fig. 1, slide protrusion is loaded from this position, then slide protrusion is slid into middle part.
When installing on new forms of energy car, the direction that the wave direction in above-mentioned deformed plate 6 is advanced along automobile sets Put.
Below the consumption of energy during clashing into is done description below:
Frontal impact: the moment of frontal impact, when speed is higher than security settings speed, such as 80 kilometers every Hour, safety pin 7 fractures automatically, and electricity battery container assembly 8 can deflect to left front due to effect of inertia, With reference to Figure 10, in the process, if dynamics is bigger, it is connected owing to the 3rd pallet is fixed with vehicle frame, Second pallet 2 has a trend forward relative to the 3rd pallet, and deformed plate deforms, at this knockout process In, owing to torsion spring, modified strip, the cooperative transformation of deformed plate three, and battery container assembly itself occurs to turn Dynamic by power decomposition, be enough to absorb the impact that the inertia of battery own brings so that battery component internal cell The impulsive force of core will the lowest at least 60%, significantly alleviate shock dynamics, it is to avoid electric pole short circuit, fire, quick-fried Fried generation.
Side impact: the moment of frontal impact, when speed is higher than security settings speed, such as 40 kilometers every Hour, safety pin 7 fractures automatically, and battery container assembly 8 can deflect to right back due to effect of inertia, With reference to Figure 11, in this knockout process, due to torsion spring, the cooperative transformation of modified strip, be enough to absorb electricity The impact that the inertia in pond own brings so that the impulsive force of battery component internal cell core will the lowest at least 50%, Significantly alleviate shock dynamics, it is to avoid electric pole short circuit, the generation firing, exploding.
Embodiment described above is only to be described the preferred embodiment of the present invention, not to this Bright scope is defined, on the premise of designing spirit without departing from the present invention, and relevant technical staff in the field Various deformation and improvement to the present invention, all should expand in protection domain as determined by claims of the present invention.

Claims (6)

1. there is the power battery pack of pooling feature, total including the internal battery container containing battery assembly Become (8), it is characterised in that also include the first pallet (1), the second pallet (2), the 3rd pallet (3), Torsion spring (4), the first modified strip (51), the second modified strip (52), deformed plate (6) and safety pin (7), Wherein,
Described battery container assembly (8) is arranged on the first pallet (1) upside;
Four corners of the first pallet (1) are provided with the first pin hole (13), described first pin hole For through hole;The lower surface of the first pallet (1) arrange near corner, left front one downwardly extend lead To post (14), and being nested with a torsion spring (4) on lead, described torsion spring (4) performance indications meet angle Degree--loading ratio is 45 degree--1 ton;The first pallet lower surface away from lead (14) is provided with a cunning Dynamic projection (15), described slide protrusion (15) is for be fixed on the cylinder on the first pallet (1);
Second pallet (2) is set in the lower section of the first pallet (1), wherein, in described second pallet (2) It is provided with the circular hole (21) coordinated with lead, described torsion spring (4) and lead (14) and is inserted in circular hole (21) in, and it is provided with a reaming in the bottom of circular hole, and a blind flange (16) is set at reaming, Described torsion spring lower end is inserted in the slot of blind flange (16), and the bottom of lead (14) is provided with one Individual flange (17), the diameter of described flange is bigger than the diameter of lead;
Four corners of the second pallet (2) are provided with the second pin hole (22), and described second pin Hole is blind hole, and described first, second pin hole is correspondingly arranged, and inserts one in every pair of first, second pin-and-hole Individual safety pin (7);
Described second pallet (2) is away from being provided with an arc chute (23) on the upper surface of circular hole, described Arc chute (23) is that the center of circle is configured with described circular hole (21), and in described arc chute (23) It is provided with two symmetrically arranged first modified strip (51) and the second modified strip (52), described first, second The two ends of modified strip be positioned at arc chute (23) two ends and in centre position simultaneously with slide protrusion (15) Contact, described slide protrusion is slidably matched with arc chute forming curves;Described the first modified strip and second Modified strip is aluminium alloy modified strip, has certain elasticity and occurs completely in the case of extraneous severe impact Compressing and pulverize, dynamics of pulverizing is not less than 0.5 ton;
It is attached by corrugated deformed plate (6) between described second pallet and the 3rd pallet, and institute The wave direction stated in deformed plate (6) is arranged along the direction that automobile is advanced, and at the 3rd pallet (3) Surrounding is provided with bolt mounting holes (31).
The power battery pack with pooling feature the most according to claim 1, it is characterised in that institute The cooperation face stating slide protrusion and arc chute is T-shaped chute (24).
The power battery pack with pooling feature the most according to claim 1, it is characterised in that electricity Pond housing assembly (8) includes metal shell (81), battery assembly (82) and output electrode (83), its In, described metal shell (81) is square or cuboid, and described battery assembly (82) is embedded in gold Belonging in housing (81), output electrode (83) is positioned at metal shell top, and output electrode described in two is according to right Angle is arranged.
The power battery pack with pooling feature the most according to claim 1, it is characterised in that institute Stating the first pallet (1) is a square plate.
The power battery pack with pooling feature the most according to claim 1, it is characterised in that institute Stating safety pin (7) is engineering plastics pin, is provided with a breach (71), and this work in the middle part of described safety pin Engineering plastics pin breach after such insertion falls just at the faying surface of first, second pin hole, and breach (71) Towards vehicle body side.
The power battery pack with pooling feature the most according to claim 1, it is characterised in that institute Stating first, second, third pallet and be all flat aluminium alloy plate, described deformed plate is Al-alloy parts.
CN201610592660.2A 2016-07-26 2016-07-26 Power battery pack with pooling feature Active CN105977427B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107585013A (en) * 2017-09-07 2018-01-16 芜湖皖江知识产权运营中心有限公司 Batteries of electric automobile structure
CN107655892A (en) * 2017-10-31 2018-02-02 电子科技大学中山学院 Lithium battery monitoring device
CN107985048A (en) * 2017-11-28 2018-05-04 芜湖皖江知识产权运营中心有限公司 New energy car battery connection structure
CN109398064A (en) * 2018-10-25 2019-03-01 永康市特慧工贸有限公司 A kind of new energy car battery group mounting rack
CN110010813A (en) * 2019-04-11 2019-07-12 南京航空航天大学 A kind of packaged type power battery guard system
CN110534677A (en) * 2019-09-11 2019-12-03 中车株洲电力机车有限公司 Rail traffic vehicles and its battery Installation cabinet
CN111409436A (en) * 2020-04-13 2020-07-14 合肥森印科技有限公司 Vehicle-mounted battery protection frame
CN112124470A (en) * 2020-08-10 2020-12-25 安徽鑫奇睿新能源科技有限公司 Electric bicycle battery case structure suitable for mountain region

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107585013A (en) * 2017-09-07 2018-01-16 芜湖皖江知识产权运营中心有限公司 Batteries of electric automobile structure
CN107585013B (en) * 2017-09-07 2020-06-09 芜湖皖江知识产权运营中心有限公司 Battery structure of electric automobile
CN107655892A (en) * 2017-10-31 2018-02-02 电子科技大学中山学院 Lithium battery monitoring device
CN107655892B (en) * 2017-10-31 2023-09-12 安徽能通新能源科技有限公司 Lithium battery monitoring device
CN107985048A (en) * 2017-11-28 2018-05-04 芜湖皖江知识产权运营中心有限公司 New energy car battery connection structure
CN109398064A (en) * 2018-10-25 2019-03-01 永康市特慧工贸有限公司 A kind of new energy car battery group mounting rack
CN109398064B (en) * 2018-10-25 2020-06-23 贵州鹰明智慧物联科技实业有限责任公司 New energy automobile group battery mounting bracket
CN110010813A (en) * 2019-04-11 2019-07-12 南京航空航天大学 A kind of packaged type power battery guard system
CN110534677A (en) * 2019-09-11 2019-12-03 中车株洲电力机车有限公司 Rail traffic vehicles and its battery Installation cabinet
CN110534677B (en) * 2019-09-11 2022-08-12 中车株洲电力机车有限公司 Rail transit vehicle and storage battery mounting cabinet thereof
CN111409436A (en) * 2020-04-13 2020-07-14 合肥森印科技有限公司 Vehicle-mounted battery protection frame
CN112124470A (en) * 2020-08-10 2020-12-25 安徽鑫奇睿新能源科技有限公司 Electric bicycle battery case structure suitable for mountain region

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