CN213799300U

CN213799300U - Battery pack and vehicle

Info

Publication number: CN213799300U
Application number: CN202022196775.4U
Authority: CN
Inventors: 田旭光; 于福成; 任飞; 刘默涵; 赵立志; 孙艳; 苗志恒; 郑慧苗
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-07-27
Anticipated expiration: 2030-09-29

Abstract

The utility model discloses a battery package and vehicle, battery package includes: the device comprises a shell, a first fixing piece and a second fixing piece, wherein an accommodating cavity is formed in the shell; the battery module is arranged in the accommodating cavity; a floating plate assembly disposed in the receiving space and disposed between the bottom wall of the case and the battery module, the floating plate assembly including: a floating plate body, at least a portion of which is configured as a hard layer structure. According to the utility model discloses a be provided with the floating plate subassembly in the battery package, the at least part structure of floating plate subassembly is hard layer structure, and the floating plate subassembly can remove along with the deformation of casing diapire to the point impact that makes the casing diapire receive turn into and the battery module between face strike, improved the security of battery package greatly.

Description

Battery pack and vehicle

Technical Field

The utility model belongs to the technical field of the vehicle and specifically relates to a battery package and vehicle are related to.

Background

In the correlation technique, when the vehicle in-process was run and is met the barrier in the bottom, the collision impact can be transmitted the diapire that the battery wrapped, makes the diapire of battery package take place towards the deformation of battery pack direction, and the collision impact concentrates on battery pack's contact position, has led to causing battery pack to be damaged because of a certain point collision impact is too big on the battery pack, has increased the damaged risk of battery pack in the collision process.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a battery pack, be provided with the floating plate subassembly in this battery pack, the at least part structure of floating plate subassembly is hard layer structure, and the floating plate subassembly can remove along with the deformation of casing diapire to the point impact that makes the casing diapire receive turn into and the battery module between face strike, improved the security of battery pack greatly.

The utility model discloses still provide a vehicle that has above-mentioned battery package.

According to the utility model discloses a battery package includes: the device comprises a shell, a first fixing piece and a second fixing piece, wherein an accommodating cavity is formed in the shell; the battery module is arranged in the accommodating cavity; a floating plate assembly disposed in the receiving space and disposed between the bottom wall of the case and the battery module, the floating plate assembly including: a floating plate body, at least a portion of which is configured as a hard layer structure.

According to the utility model discloses a battery pack, through set up the floating plate subassembly in the casing, with the floating plate subassembly setting between the diapire of casing and battery module to transmit the impact force effectively, make the impact force dispersion to the lower surface of battery module, thereby avoid the atress of impact force to concentrate on a certain point on the battery module, take place to break with the inside electric core of avoiding the battery module, improved the security of battery pack.

According to the utility model discloses an embodiment, the battery module is a plurality of, the floating plate subassembly is just right with at least one the diapire of battery module.

According to the utility model discloses an embodiment, be provided with a plurality of electric cores in the battery module, the floating plate subassembly is with a plurality of electric core is just right.

According to the utility model discloses an embodiment, it is a plurality of the battery module is arranged in proper order in the first direction, the subassembly of floating plate extends in the second direction.

According to the utility model discloses an embodiment, floating plate constructs the subassembly and makes a plurality ofly, a plurality of floating plate subassembly sets up in one the downside of battery module.

According to the utility model discloses an embodiment, be provided with a plurality of electric cores, every in the battery module the floating plate subassembly is with a plurality of electric core is just right.

According to the utility model discloses an embodiment, electric core is all in the third direction is extended, a plurality of in the battery module electric core arranges in proper order in the fourth direction, floating plate subassembly is in third direction or fourth direction extend and with a plurality of electric core is just right.

According to the utility model discloses an embodiment, the floating plate subassembly has the orientation the battery pack fitting surface of battery module, the area of battery pack fitting surface is greater than the bottom surface of electricity core.

According to the utility model discloses an embodiment, the floating plate body has first layer structure and second floor structure, first layer structure with second floor structure superpose, deviating from of first layer structure the surface texture of second floor structure is the diapire fitting surface, deviating from of second floor structure the surface texture of first layer structure is the battery pack fitting surface, first layer structure is hard layer structure, second floor structure is elastic layer structure.

The vehicle according to the present invention is briefly described below.

According to the utility model discloses a be provided with the battery package of above-mentioned embodiment on the vehicle, because according to the utility model discloses a be provided with the battery package of above-mentioned embodiment on the vehicle, this battery package can avoid the concentration of collision impact effectively to the dispersion acts on the collision impact of battery package internals, makes the collision impact can be even transmission to the internals of battery package on, improved the anti collision performance of battery package, thereby improved the anti collision ability of vehicle travel in-process, promoted the security that the vehicle travel.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a battery pack according to an embodiment of the present invention;

fig. 2 is a bottom view of a battery pack according to an embodiment of the present invention;

fig. 3 is a top view of a battery pack according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of section A-A of FIG. 3;

FIG. 5 is an enlarged partial view of circle B in FIG. 4;

fig. 6 is a schematic layout of a floating plate assembly according to another embodiment of the present invention;

fig. 7 is a top view of a floating plate assembly according to another embodiment of the present invention;

FIG. 8 is a cross-sectional view of section C-C of FIG. 7;

FIG. 9 is an enlarged fragmentary view of circle D in FIG. 8;

fig. 10 is a schematic structural view of a floating plate body according to an embodiment of the present invention;

fig. 11 is a schematic view of a second layer structure according to an embodiment of the invention;

fig. 12 is a side view of a float plate body according to an embodiment of the present invention;

fig. 13 is a schematic view of a floating plate assembly according to another embodiment of the present invention;

fig. 14 is a schematic diagram of a first layer structure according to an embodiment of the invention.

A floating plate assembly 1, a battery pack 2, a battery assembly 3, a water-cooling plate 31, a flow channel 311, a flow channel avoiding surface 312,

a floating plate body (11) is provided,

the first layer structure 111, the bottom wall mating surface 1111, the first connecting surface 1112, the lightening holes 1113,

the second layer structure 112, the cell assembly mating surface 1121, the second connection surface 1122,

the front and back surfaces 1122a, the surrounding surface 1122b,

a first adhesive layer 114, a second adhesive layer 113, a third adhesive layer 115, and a fourth adhesive layer 116.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

A floating plate assembly 1 according to an embodiment of the present invention is described below with reference to fig. 1-14.

According to the utility model discloses a floating plate subassembly 1, floating plate subassembly 1 is used for battery package 2, and be disposed between the diapire of battery package 2 and battery package 2 subassembly, floating plate subassembly 1 includes floating plate body 11, floating plate body 11 has first layer structure 111 and second floor structure 112, first layer structure 111 and second floor structure 112 superpose, the surface structure who deviates from second floor structure 112 of first layer structure 111 is diapire fitting surface 1111, the surface structure who deviates from first layer structure 111 of second floor structure 112 is battery pack fitting surface 1121, first layer structure 111 is constructed as hard layer structure, second floor structure 112 is constructed as the elastic layer structure.

The second layer structure 112 is arranged on the upper side of the first layer structure 111, the first layer structure 111 is suitable for being matched with the bottom wall of the battery pack 2, so that when the bottom wall of the battery pack 2 collides with an obstacle, the impact generated by deformation of the bottom wall is transmitted to the second layer structure 112; wherein the first layer structure 111 is configured as a hard layer so that the first layer structure 111 moves toward the battery assembly 3 in accordance with the deformation of the bottom wall, the impact force is transmitted to the bottom wall mating surface 1111, is transmitted to the second layer structure 112 through the first layer structure 111, and contacts the battery assembly 3 by the battery assembly mating surface 1121, disperses the impact force to the first layer structure 111, to reduce the impact force of the impact force in the unit area of the lower surface of the battery assembly 3, and the contact area of the second layer structure 112 and the battery assembly 3 is larger than the contact area of the bottom wall deformation position and the first layer structure 111, the floating plate assembly 1 can disperse the impact force transmitted from the bottom wall to the battery assembly 3, effectively avoiding the concentration of collision impact force, thereby avoiding the damage of the internal parts of the battery component 3 and greatly improving the protection effect of the battery component 3.

Further, the first layer structure 111 is provided with a second layer structure 112 configured as an elastic layer structure, the elastic layer structure is arranged between the first layer structure 111 and the battery assembly 3, so as to buffer the impact force transmitted from the first layer structure 111 to the battery assembly 3, and further improve the protection effect on the battery assembly 3, and the second layer structure 112 is configured as an elastic layer so as to absorb the impact force through deformation.

According to the utility model discloses a floating plate subassembly 1, floating plate subassembly 1 is suitable for when the diapire of battery package 2 is local produces the arch towards battery pack 3, along with the diapire moves towards battery pack 3, and with battery pack 3 direct contact, the arch of diapire and battery pack 3's direct contact has been completely cut off effectively, and dispersed the diapire and transmitted the collision impact for battery pack 3, make the collision impact can transmit to battery pack 3 on evenly, avoided the collision impact force to concentrate on certain point of battery pack 3, thereby greatly reduced battery pack 3 fracture and the risk of deformation, improve the protection effect to battery pack 3.

According to an embodiment of the present invention, the thickness of the first layer structure 111 is larger than the thickness of the second layer structure 112. First layer structure 111 is the stereoplasm layer structure, sets up the thickness of first layer structure 111 into the thickness that is greater than second layer structure 112 to improve floating plate subassembly 1's structural strength, improve the reliability of floating plate subassembly 1 structure, and can transmit the collision impact of diapire for battery pack 3 evenly.

According to an embodiment of the present invention, the thickness of the first layer structure 111 is h1, the thickness of the second layer structure 112 is h2, and h1/h2 satisfies the following relation: h1/h2 is more than or equal to 0 and less than or equal to 2.

It should be understood that the thickness direction refers to the stacking direction of the first layer structure 111 and the second layer structure 112. Specifically, the thickness of the first layer structure 111 may range from 0mm to 20mm, the thickness of the second layer structure 112 may range from 3mm to 25mm, and the thickness h1 of the first layer structure 111 and the thickness h2 of the second layer structure 112 may be matched according to any proportion. For example, the thickness h3 of the floating plate assembly 1 may be predefined, and the sum of the thickness h1 of the first layer structure 111 and the thickness h2 of the second layer structure 112 is equal to the thickness h3 of the floating plate assembly 1, so that the grouping flexibility of the floating plate assembly 1 is improved by configuring the thickness h1 of the first layer structure 111 and the thickness h2 of the second layer structure 112 to be combined in any ratio.

In the embodiment, the ratio of the thickness h1 of the first layer structure 111 to the thickness h2 of the second layer structure 112 is 0-h 1/h 2-2, so that the volume of the floating plate assembly 1 can be effectively reduced while the structural strength of the floating plate assembly 1 is ensured, and the mass of the floating plate assembly 1 is reduced.

According to an embodiment of the present invention, the first layer structure 111 has a first connection surface 1112 facing the second layer structure 112, the second layer structure 112 has a second connection surface 1122 facing the first layer structure 111, and the area of the first connection surface 1112 is not greater than the area of the second connection surface 1122.

As shown in fig. 1, a surface of the first layer structure 111 facing away from the bottom wall mating surface 1111 is configured as a first connection surface 1112, a surface of the second layer structure 112 facing away from the cell assembly mating surface 1121 is configured as a second connection surface 1122, and the first connection surface 1112 and the second connection surface 1122 are opposite, wherein the first connection surface 1112 and/or the first connection surface 1112 are provided with a second adhesive layer 113, and the second adhesive layer 113 is suitable for fixing the first layer structure 111 and the second layer structure 112, thereby improving the structural reliability of the floating plate assembly 1.

Wherein, construct the area of second connection face 1122 for not less than the area of first connection face 1112, make second layer structure 112 can cover the lower surface of battery pack 3 completely, the vehicle is when colliding, second layer structure 112 can fully contact battery pack 3, thereby the protection scope of floating plate subassembly 1 to battery pack 3 has been improved, make the area of first connection face 1112 be less than the area of second connection face 1122 simultaneously, because the density of second layer structure 112 is less than the density of first layer structure 111, can reduce the quality of floating plate subassembly 1 through the volume that makes the volume of second layer structure 112 be greater than first layer structure 111, realize lightweight design, the protection effect of floating plate subassembly 1 to battery pack has been guaranteed simultaneously.

According to an embodiment of the present invention, the second connecting surface 1122 includes a front surface 1122a and a surrounding surface 1122b, and the front surface 1122a is opposite to the first connecting surface 1112; the surrounding surface 1122b is configured as an annular surface and is provided on the outer peripheral edge of the opposing surface 1122 a.

As shown in fig. 10 and 11, the front-to-back surface 1122a faces the first connection surface 1112, the front-to-back surface 1122a is adapted to be adhesively fixed to the first connection surface 1112, and the surrounding surface 1122b is configured in a ring shape and is adapted to the shape of the outer peripheral edge of the front-to-back surface 1122a, so that the front-to-back surface 1122a can be well embedded in the surrounding surface 1122 b. The first layer structure 111 is disposed in the middle of the second layer structure 112, so that the arrangement of the floating plate assembly 1 is more reasonable, the first connection surface 1112 of the first layer structure 111 can better abut against the second connection surface 1122, and the impact force transmission between the first layer structure 111 and the second layer structure 112 is ensured to be reliable.

Further, the surrounding surface 1122b is provided with a protruding portion protruding toward the lower side, and the protruding portion is disposed around the first layer structure 111, it can be understood that the protruding portion protrudes downward, an inner side wall of the protruding portion is matched with the opposite surface 1122a to form a receiving groove of the first layer structure 111, wherein the first connecting surface 1112 is adapted to abut against the opposite surface 1122a, a peripheral surface of the first layer structure 111 abuts against an inner side wall of the protruding portion, and at least a portion of the first layer structure 111 can be received in the receiving groove, when the first layer structure 111 is matched with the second layer structure 112, a matching position of the first layer structure 111 and the second layer structure 112 can be quickly and accurately determined through the receiving groove, so as to realize quick assembly of the floating plate assembly 1, and simultaneously improve accuracy of matching of the first layer structure 111 and the second layer structure 112.

According to an embodiment of the present invention, the area of the surrounding surface 1122b is s1, the area of the first connection surface 1112 is s2, and s1/s2 satisfies the following relation: s1/s2 is more than 0 and less than or equal to 0.12. The ratio of the area s1 of the surrounding surface 1122b to the area s2 of the first connection surface 1112 is set to be in the range of 0 < s1/s2 to 0.12, so as to ensure that the area of the second connection surface 1122 is larger than the area of the first connection surface 1112, and the area of the second layer structure 112 can fully cover the lower surface of the battery assembly 3, thereby improving the protection range of the floating plate assembly 1 to the battery assembly 3 and improving the protection effect of the floating plate assembly 1 to the battery assembly 3.

According to an embodiment of the present invention, the floating plate body 11 is configured in plurality and stacked in sequence between the bottom wall of the battery pack 2 and the battery assembly 3 of the battery pack 2.

The plurality of floating plate bodies 11 are stacked in order in the thickness direction, that is, the second floating plate body 11 is disposed on the first floating plate body 11, the third floating plate body 11 is disposed on the second floating plate body 11 and stacked in order therefrom, the nth floating plate body 11 is disposed at the uppermost end of the floating plate assembly 1, wherein N is equal to or greater than 1, and the second layer structure 112 of the nth floating plate body 11 has a battery assembly mating surface 1121 which mates with the battery assembly 3, the battery assembly mating surface 1121 is adapted to mate with the battery assembly 3, the floating plate body 11 located at the lowermost side of the floating plate assembly 1 has a bottom wall mating surface 1111 which mates with the bottom wall of the battery pack 2, and the bottom wall mating surface 1111 is adapted to mate with the bottom wall of the battery pack 2.

Further, as shown in fig. 13, a plurality of floating plate bodies 11 are fixed by bonding, a first adhesive layer 114 is disposed between two adjacent floating plate bodies 11, the first adhesive layer 114 is adapted to fix two adjacent floating plate bodies 11, wherein one side of the first adhesive layer 114 is adapted to be bonded to the lower surface of the first layer structure 111 of one floating plate body 11, the other side of the first adhesive layer 114 is adapted to be bonded to the upper surface of the second layer structure of the other floating plate body 11, and two adjacent floating plate bodies 11 are fixed by bonding, thereby effectively reducing the difficulty of connection between the floating plate bodies 11 and improving the convenience of connection between the plurality of floating plate bodies 11.

Furthermore, the plurality of floating plate bodies 11 are sequentially stacked in the thickness direction, so that the floating plate assembly 1 can fully fill the gap between the bottom wall of the battery pack 2 and the battery assembly 3, the displacement of the first layer structure 111 in the floating plate bodies 11 is effectively reduced, the impact force on the floating plate bodies 11 is more uniform, the collision impact is prevented from being concentrated on the battery assembly 3, and the collision impact on the battery assembly is more uniform. While the plurality of floating plate bodies 11 have a plurality of second layer structures 112, each second layer structure 112 may be sufficiently compressed to sufficiently cushion the impact force. According to the utility model discloses an embodiment, the distance between the diapire of battery package 2 and battery pack 3 is d, and the number of floating plate body 11 is n, and the thickness of first layer structure 111 is h1, and the thickness of second layer structure 112 is h2, and n, h1, h2 satisfy the relational expression: n is not more than d/(h1+ h 2).

It is understood that the first layer structure 111 and the second layer structure 112 are stacked between the bottom wall of the battery pack 2 and the battery modules 3, the sum of the thickness h1 of the first layer structure 111 and the thickness h2 of the second layer structure 112 is the thickness of the floating plate body 11, the floating plate body 11 can fill the space between the bottom wall of the battery pack 2 and the battery modules 3, and the distance d between the bottom wall of the battery pack 2 and the battery modules 3 can be calculated to be compared with the sum of the thickness h1 of the first layer structure 111 and the thickness h2 of the second layer structure 112, and the distance d between the bottom wall of the battery pack 2 and the battery modules 3 can accommodate the number of the floating plate bodies 11.

Wherein, the floating plate body 11 that the quantity is n stacks in proper order, and the size of the floating plate subassembly 1 after the pile is not more than the distance d between the diapire of battery package 2 and battery pack 3, prevents that the second floor structure among the floating plate subassembly 1 atress under the mounted state from avoiding causing the overstock to the second floor structure, makes floating plate body 11 fully fill between the diapire of battery package 2 and battery pack 3.

In this embodiment, n is equal to or greater than 1, and the maximum value of n is preferred, and when n is the maximum value, the floating plate assembly 1 can fully fill the distance between the bottom wall of the battery pack 2 and the battery assembly 3.

According to the utility model discloses an implement, the diapire of floating plate subassembly 1 and battery package 2 is fixed or floating plate subassembly 1 and battery package 2's diapire interval sets up.

As shown in fig. 1, the bottom wall of the floating plate assembly 1 is fixed to the bottom wall of the battery pack 2 through the fastener or the fourth adhesive layer 116, so that the reliability of the bottom wall matching of the floating plate assembly 1 and the battery pack 2 is improved, the collision impact on the bottom wall can be directly transmitted to the floating plate assembly 1, the deformation degree generated on the bottom wall can be effectively reduced, meanwhile, the displacement can be better realized along with the deformation of the bottom wall, and the impact on the battery assembly 3 is reduced.

According to another embodiment of the present invention, as shown in fig. 1, the floating plate assembly 1 is fixed to the battery assembly 3 through the third bonding layer 115, and is spaced from the bottom wall of the battery pack 2 and the floating plate assembly 1, and the floating plate assembly 1 is spaced from the bottom wall of the battery pack 2, so as to reduce the displacement of the floating plate assembly 1 along with the deformation of the bottom wall, and make the impact on the floating plate assembly 1 more uniform.

According to the utility model discloses an embodiment, first layer structure 111 constructs for the working of plastics, and the rigidity of working of plastics is good, and density is low, when having guaranteed 1 structural strength of floating plate subassembly, helps reducing 1's of floating plate subassembly quality, and the cost of working of plastics is low, and easy shaping has reduced 1's of floating plate subassembly cost effectively. The plastic part is selected from PA6, PA66, ABS, PE, PVC, etc.

According to one embodiment of the present invention, the second layer structure 112 is configured as a foam. The foam piece has elasticity and strong deformation capability, good buffering effect and low density, and the second layer structure 112 is constructed into the foam piece, so that the floating plate component 1 can effectively buffer the impact between the bottom wall of the battery pack 2 and the battery component 3, and the protection effect on the battery component 3 is greatly improved. Wherein, the foam piece can be selected from EPE, PU, EVA, PE, CR and the like.

According to an embodiment of the utility model, the bubble cotton piece is constructed as antistatic bubble cotton. The foam piece is made into anti-static foam to prevent static electricity from being generated between the foam piece and the battery component 3, so that the phenomenon of electric leakage of the battery component 3 caused by the static electricity is effectively avoided, and the use safety of the floating plate component 1 is improved.

According to an embodiment of the invention, at least part of the first layer structure 111 is formed with weight-reducing cavities. The weight reduction cavity is arranged in the first layer structure 111 to reduce the mass of the first layer structure 111, and meanwhile, the used materials of the first layer structure 111 can be reduced, so that the mass of the floating plate assembly 1 is effectively reduced, and the cost of the floating plate assembly 1 is reduced.

As shown in fig. 14, according to an embodiment of the present invention, the outer surface of the first layer structure 111 is formed with lightening holes 1113, the lightening holes 1113 may be configured in a plurality, and the plurality of lightening holes 1113 are arranged at intervals to further reduce the mass of the first layer structure 111, thereby realizing a light weight design; the lightening holes 1113 may be arranged at intervals to improve the structural strength of the first layer structure 111 and avoid the local strength from being too low.

According to an embodiment of the present invention, as shown in fig. 14, the lightening holes 1113 extend in the thickness direction of the first layer structure 111, and the lightening holes 1113 penetrate through the first layer structure 111 in the thickness direction, and the lightening holes 1113 are configured to extend in the thickness direction, so as to avoid the lightening holes 1113 from affecting the structural strength of the first layer structure 111 in the thickness direction, and thus the mass of the first layer structure 111 can be effectively reduced on the premise of ensuring the structural strength of the first layer structure 111.

According to an embodiment of the present invention, the area of the bottom wall mating surface 1111 is s3, the sum of the cross-sectional areas of the plurality of lightening holes 1113 is s4, and s3/s4 satisfies the following relation: s4/s3 is more than 0 and less than or equal to 0.3. The range of the ratio of the sum s4 of the cross-sectional areas of the lightening holes 1113 to the area s3 of the bottom wall matching surface 1111 is set to be 0 & lt s4/s3 & lt 0.3, so that the cross-sectional areas of the lightening holes 1113 are limited, the strength of the first layer structure 111 is prevented from being weakened by the lightening holes 1113 excessively, and the strength of the first layer structure 111 is ensured.

The battery pack 2 according to the present invention is described below.

The battery pack 2 comprises a shell, a battery component 3 and a floating plate component 1, wherein a containing cavity is arranged in the shell; the battery component 3 is arranged in the accommodating cavity; the floating plate assembly 1 is disposed between the upper surface of the bottom wall of the housing and the battery assembly 3.

The battery component 3 is accommodated in the accommodating cavity of the shell to protect the battery component 3, furthermore, a floating plate component 1 is arranged between the bottom wall of the shell and the battery component 3, the battery pack is generally arranged at the bottom of a vehicle, when the bottom of the vehicle collides with an obstacle, the bottom wall of the shell is contacted with the obstacle and deforms, and meanwhile, the floating plate component 1 is suitable for moving towards the battery component 3 along with the bottom wall of the shell when the bottom wall of the shell deforms towards the battery component 3 and is contacted with the battery component 3 to transmit impact generated by deformation of the bottom wall of the shell to the battery component 3; wherein, the area of contact of floating plate subassembly 1 and battery pack 3 is greater than the area of contact of casing diapire deformation position and battery pack 3, and floating plate subassembly 1 can disperse the impact force of being transmitted to battery pack 3 by the casing diapire, has avoided the concentration of collision impact force effectively, and then has reduced the impaired risk of internals of battery pack 3, makes the impact force can disperse the lower surface at battery pack 3 better, avoids the impact force too to concentrate.

According to the utility model discloses a battery package 2, through set up floating plate subassembly 1 between casing diapire and battery pack 3, floating plate subassembly 1 can disperse the collision impact that is transmitted to battery pack 3 by the casing diapire effectively, has avoided the impact force to concentrate on certain a bit on battery pack 3, has reduced the risk that battery pack 3 internals appear breaking and damaging in the collision to battery pack 3 anti-collision ability has been improved, battery package 2's reliability has been improved.

According to an embodiment of the present invention, as shown in fig. 4 and 5, the lower side of the battery assembly 3 is provided with a water cooling plate 31, a flow passage 311 is formed in the water cooling plate 31, and the floating plate assembly 1 is disposed between the upper surface of the bottom wall of the housing and the lower surface of the water cooling plate 31. The floating plate assembly 1 is disposed between the upper surface of the bottom wall of the housing and the lower surface of the water-cooling plate 31, so that the floating plate assembly 1 can uniformly transmit the collision impact to the water-cooling plate 31, and the collision impact force is prevented from being concentrated on the water-cooling plate 31.

According to the utility model discloses an embodiment, the lower surface of water-cooling plate 31 is provided with the runner of dodging runner 311 and dodges face 312, and every floating plate subassembly 1 dodges face 312 with the runner that corresponds just right. The floating plate assembly 1 is arranged to be opposite to the flow channel avoiding surface 312, so that collision impact is prevented from being transmitted to the flow channel 311 by the floating plate assembly 1, the flow channel 311 on the water cooling plate 31 is effectively protected, and the flow channel in the water cooling plate 31 can be prevented from being fractured by impact force, so that leakage of cooling liquid is prevented from occurring when the bottom of the battery pack 2 is collided.

According to the utility model discloses an embodiment, be formed with the runner between two adjacent runners 311 and dodge the groove, the runner dodges the diapire structure in groove and dodges face 312 for the runner, at least part of floating plate subassembly 1 can be acceptd and dodge the inslot at the runner, and floating plate subassembly 1 just right with the diapire in groove is dodged to the runner, when battery package 2's casing diapire takes place deformation, floating plate subassembly 1 is suitable for and dodges the diapire in groove with the runner and ends, and give the diapire in groove is dodged to the runner with the collision impact transmission, the lateral wall in groove can be with the moving direction who restricts floating plate subassembly simultaneously to the runner, and with floating plate subassembly 1's removal restriction inslot, avoid floating plate subassembly 1 to move towards runner 311 direction, the accuracy of floating plate subassembly 1 moving direction has been ensured.

Through the arrangement of the runner avoiding groove, the floating plate assembly is accommodated in the runner avoiding groove, the floating plate assembly and the runner can be overlapped in the thickness direction, and meanwhile, the thickness of the battery pack 2 can be reduced.

According to the utility model discloses an embodiment, runner 311 dodges and is provided with at least one floating plate subassembly 1 in the inslot to guarantee that floating plate subassembly 1 can dodge the runner that the collision strikeed evenly and transmit to water-cooling plate 31 and dodge on the face 312.

Further, the floating plate assemblies 1 can be arranged in a plurality of numbers, the floating plate assemblies 1 are arranged at intervals along the length direction and/or the width direction of the flow channel avoiding surface 312, the floating plate assemblies 1 can be arranged at intervals along the length direction or the width direction of the flow channel avoiding surface 312, and meanwhile, the floating plate assemblies 1 can also be arranged at intervals along the length direction and the width direction so as to increase the facing area of the floating plate assemblies 1 and the flow channel avoiding surface 312, so that the floating plate assemblies 1 can fully cover the flow channel avoiding surface 312.

Specifically, the flow channel avoiding surface 313 extends in the length direction, a plurality of floating plate assemblies 1 can be arranged in one flow channel avoiding surface 313, the plurality of floating plate assemblies 1 are also arranged at intervals in the length direction, one or more battery modules in the battery assemblies can be corresponding to the flow channel avoiding surface 313, the flow channel avoiding surface 313 at least corresponds to a plurality of battery cells, the floating plate assemblies 1 are arranged at intervals in the length direction, can be aligned to the plurality of battery cells and the plurality of battery modules, the arrangement mode of the floating plate assemblies 1 is more flexible, and the arrangement can be carried out according to the length of the flow channel avoiding surface 313 and the length of the floating plate assemblies 1.

According to the utility model discloses an embodiment, the length of the surface 312 is dodged to the runner is a1, and the length of the floating plate subassembly 1 just right with this surface 312 is a2, and a1/a2 satisfies the relational expression: 0.3-a 2/a 1-1.

Specifically, the water cooling plate 31 of the battery assembly 3 is provided with battery cells, and the length of the floating plate assembly 1 depends on the corresponding relationship between the floating plate assembly 1 and the battery cells, for example, when one floating plate assembly 1 covers 2 battery cells in the length direction, the length of the floating plate assembly 1 may take the width of 2 battery cells; when floating plate subassembly 1 covers 4 electric cores in length direction, the length of floating plate subassembly 1 can be worth for the width of 4 electric cores, can design according to the demand, has improved the flexibility that floating plate subassembly 1 was in groups.

Further, as shown in fig. 6, the length a2 of the floating plate assembly 1 is not greater than the length a1 of the flow path avoiding surface 312, so as to avoid interference with the side wall of the flow path avoiding groove in the width direction when the floating plate assembly 1 moves toward the flow path avoiding surface 312. Wherein, the ratio of the length a2 of the floating plate component 1 to the length a1 of the flow passage avoiding surface 312 is structured as follows: a2/a1 is not less than 0.3 and not more than 1, so that the floating plate component 1 can more uniformly transmit collision impact to the flow channel avoiding surface 312, and at most 3 floating plate components can be arranged in one flow channel avoiding surface 312.

According to an embodiment of the utility model, the width of the surface 312 is dodged to the runner is b1, and the width of floating plate subassembly 1 is b2, and b1/b2 satisfies the relational expression: b2/b1 is more than or equal to 0.5 and less than or equal to 1. It is understood that, as shown in fig. 5, the width b1 of the floating plate assembly 1 is set to be no greater than the width b2 of the flow passage avoiding surface 312, so as to avoid interference with the wall of the flow passage 311 avoiding groove when the floating plate assembly 1 moves toward the flow passage avoiding surface 312, so that the floating plate assembly 1 can uniformly transmit collision impact to the water cooling plate 31, and in some embodiments, the flow passage avoiding surface 312 can accommodate at most two floating plate assemblies 1 in the width direction.

According to the utility model discloses an embodiment, set up the width b1 of floating plate subassembly 1 to be equal to the runner and dodge the width b2 of face 312, floating plate subassembly 1 can cover the runner completely on the width direction this moment and dodge face 312, makes floating plate subassembly 1 can be at arbitrary position protection water-cooling board 31, has improved floating plate subassembly 1 to water-cooling board 31's protective effect. Wherein the width of the floating plate assembly 1 is greater than 5 mm.

As shown in the embodiment of fig. 5, the width b1 of the floating plate assembly 1 is slightly larger than the width b2 of the flow channel avoiding surface 312, so that two sides of the groove in the width direction are rounded, which is convenient for processing the water channel and enables the floating plate assembly 1 to completely fit the flow channel avoiding surface.

According to an embodiment of the present invention, the thickness of the flow channel 311 is c1, the thickness of the floating plate assembly 1 is c2, and c1/c2 satisfies the following relation: c2/c1 is more than or equal to 1 and less than or equal to 5. The ratio of the thickness c1 of the flow channel 311 to the thickness c2 of the floating plate assembly 1 is set to be 1-5 c2/c1, so that the floating plate assembly 1 is prevented from being too large in thickness and slightly protrudes out of the lower surface of the water cooling plate 31, the flow channel 311 is prevented from contacting with the bottom wall of the bottom shell, and the flow channel 311 is effectively protected. When the ratio of the thickness c1 of the flow channel 311 to the thickness c2 of the floating plate assembly 1 is 1.6, the floating plate assembly 1 can effectively protect the flow channel 311 when the bottom of the shell bears the extrusion force of 25KN, and the flow channel 311 is prevented from being damaged.

According to an embodiment of the present invention, the plurality of floating plate assemblies 1 are arranged at intervals along the length direction and/or the width direction, the spacing distance can be taken as a value according to the requirement, the spacing distance range of two adjacent floating plate assemblies 1 in the length direction is 0mm-60mm, wherein, when the spacing distance of two adjacent floating plate assemblies 1 in the length direction is 60mm, the floating plate assemblies 1 can be at least aligned with two battery cells, and the two ends of the floating plate assemblies 1 in the length direction are respectively aligned with the middle positions of the two battery cells; similarly, the range of the spacing distance between two adjacent floating plate assemblies 1 in the width direction is 0mm-60mm, wherein when the spacing distance between two adjacent floating plate assemblies 1 in the width direction is 60mm, the floating plate assemblies 1 can be at least opposite to two battery cells, and the two ends of the floating plate assemblies 1 in the width direction are respectively opposite to the middle positions of the two battery cells.

The battery pack 2 according to the present invention is described below.

According to the utility model discloses a battery package 2 includes: casing, battery module and floating plate subassembly 1, be formed with in the battery package 2 and hold the chamber, the battery module sets up in holding the intracavity, the casing can be used for protecting the battery module to avoid the battery module to receive external impact, floating plate subassembly 1 sets up in accommodation space and is disposed between the diapire of casing and battery module, floating plate subassembly 1 is including floating plate body 11, at least part structure of floating plate body 11 is hard layer structure.

According to the battery pack 2 of the utility model, the floating plate component 1 is arranged between the battery module and the bottom wall of the shell, when the vehicle runs, the obstacle on the road surface contacts the battery pack 2 at the bottom of the vehicle, the obstacle collides with the battery pack 2, the bottom wall of the shell firstly contacts with the obstacle, the bottom wall of the shell can deform and invade into the accommodating cavity, the floating plate component 1 in the battery pack 2 can move along with the deformation of the bottom wall of the shell, because the obstacle is in point contact with the bottom wall of the shell, the floating plate component 1 moves upwards along with the deformation of the bottom wall of the shell until contacting with the battery module, the contact area between the floating plate component 1 and the battery module is large, the impact force can be effectively dispersed to the lower surface of the battery module, thereby avoiding the impact force from being concentrated on the lower surface of the battery module, and preventing the electric core in the battery module from breaking and deforming, thereby improving the impact resistance and safety of the battery pack 2.

According to the utility model discloses a battery package 2, through set up floating plate subassembly 1 in the casing, with floating plate subassembly 1 setting between the diapire of casing and battery module to transmit the impact force effectively, make the impact force dispersion to the lower surface of battery module, thereby avoid the atress of impact force to concentrate on certain a bit on the battery module, take place to break with the inside electric core of avoiding the battery module, improved battery package 2's security.

According to the utility model discloses an embodiment, the battery module is a plurality of, and floating plate subassembly 1 is just right with the diapire of at least one battery module. The utility model discloses an in the embodiment, can be provided with a plurality of battery modules in the battery package 2, a plurality of battery modules can lay on the diapire of casing, and a plurality of battery modules are located same bedding, and floating plate subassembly 1 sets up in the downside of battery module, and a floating plate subassembly 1 is just right with the diapire of at least one battery module.

When a floating plate assembly 1 is aligned with a battery module, the floating plate assembly 1 can disperse impact force from the bottom of the case to the bottom wall of the battery module, dispersing the impact force, and a floating plate assembly 1 can protect a battery module. The single floating plate is small in size, convenient to install and low in cost.

When one floating plate assembly 1 is aligned with a plurality of battery modules, the floating plate assembly 1 may disperse the impact force from the bottom of the case to the bottom walls of the plurality of battery modules, further dispersing the impact force, and one floating plate assembly 1 may protect the plurality of battery modules. The single floating plate is large in size, so that impact force can be better dispersed, and the protection effect is good.

According to the utility model discloses an embodiment is provided with a plurality of electric cores in the battery module, and floating plate subassembly 1 is just right with a plurality of electric cores, sets up floating plate subassembly 1 and just right with a plurality of electric cores, makes floating plate subassembly 1 can be with the lower surface of impact force dispersion to a plurality of electric cores.

The produced impact force of battery package 2 and barrier collision mainly concentrates on electric core, and electric core is as the minimum unit in the battery module, if the impact force too concentrates and can lead to electric core to take place to break, floating plate subassembly 1 is just right with a plurality of electric cores, can disperse the impact force to a plurality of electric cores, and the impact force is shared to a plurality of electric cores, greatly reduced the cracked risk of single electric core, improved the security and the reliability of battery module.

According to the utility model discloses an embodiment, a plurality of battery module are arranged in proper order in the first direction, and floating plate subassembly 1 extends in the second direction. The first direction may be a length direction of the battery pack 2, the second direction may be a width direction of the battery pack 2, the plurality of battery modules are arranged at intervals in the length direction of the battery pack 2, the floating plate assembly 1 extends in the width direction of the battery pack 2, the plurality of battery cells arranged in each battery module may be arranged vertically, and each battery module may extend in the first direction or in the second direction.

According to the utility model discloses an embodiment, floating plate subassembly 1 constructs to be a plurality ofly, a plurality of floating plate subassembly 1 sets up in the downside of a battery module, downside at a battery module is provided with a plurality of floating plate subassembly 1, the area of the lower surface of single battery module is great, if only set up the size of a floating plate subassembly 1 and the lower surface of battery module the same, at the in-process that floating plate subassembly 1 transmitted the impact, floating plate subassembly 1 can take place to heel, and still lead to the atress of the department of heeling to concentrate, and then make the battery module still have the risk of taking place to break. When the downside at battery module set up a plurality of floating plate subassembly 1, every floating plate subassembly 1 floats alone, and floating plate subassembly 1's removal is steady more even, the condition of unilateral perk can not appear to guaranteed that floating plate subassembly 1 can disperse the impact force to battery module's lower surface effectively.

In the above embodiment, each floating plate assembly 1 is just opposite to a plurality of electric cores, although a plurality of floating plate assemblies 1 are arranged on the lower surface of the battery module, the condition that the floating plates are single-edge tilted and float unevenly is avoided, each floating plate assembly 1 still needs to disperse point impact to the lower sides of a plurality of electric cores so as to avoid the impact force to be concentrated in one electric core, the floating plate assemblies 1 are just opposite to a plurality of electric cores, and a single electric core can be prevented from being subjected to overlarge impact force, so that the safety of the battery pack 2 is improved.

According to the utility model discloses an embodiment, electric core all extends in the third direction, and a plurality of electric cores in the battery module are arranged in proper order in the fourth direction, and floating plate subassembly 1 extends and just right with a plurality of electric cores in third direction or fourth direction. The third direction can be for the width direction of battery package 2, and the fourth direction can be for the length direction of battery package 2, and electric core can be constructed for hexahedron rectangular form electric core, and electric core can extend at the width direction of battery package 2 to guarantee the capacity of single electric core, a plurality of electric cores are arranged at the length direction interval of battery package 2, can increase the quantity of electric core in the battery package 2, thereby wholly improve the energy density of battery package 2.

The floating plate component 1 is configured to be the same as the extending direction of the battery core when extending in the third direction, specifically, the battery core can cover the bottom wall of the single battery core, when the battery pack 2 collides, the impact force is dispersed to the bottom wall of the single battery core through the floating plate component 1, even if the floating plate component 1 is subjected to unilateral tilting, the floating plate component 1 can incline, but the floating plate component 1 still has a larger contact area with the single battery core, and the single battery core cannot be stressed too intensively.

The floating plate component 1 is constructed in such a way that when the floating plate component extends in the fourth direction, the extending direction of the floating plate component 1 is just opposite to the width directions of the plurality of electric cores, when the battery pack 2 collides, the impact force is dispersed to the bottom walls of the plurality of electric cores through the floating plate component 1, the impact force can be distributed to each electric core, and the phenomenon that the stress of a single electric core is too concentrated is avoided.

According to an embodiment of the present invention, the floating plate body 11 has a first layer structure 111 and a second layer structure 112, the first layer structure 111 overlaps the second layer structure 112, the surface of the first layer structure 111 facing away from the second layer structure 112 is configured as a bottom wall mating surface 1111, the surface of the second layer structure 112 facing away from the first layer structure 111 is configured as a battery assembly mating surface 1121, the first layer structure 111 is configured as a hard layer structure, and the second layer structure 112 is configured as an elastic layer structure.

It should be noted that a plurality of battery modules and the water cooling plate 31 may be provided in one battery pack 2.

The second layer structure 112 is arranged on the upper side of the first layer structure 111, the first layer structure 111 is suitable for being matched with the bottom wall of the shell, so that when the bottom wall of the shell collides with an obstacle, impact generated by deformation of the bottom wall is transmitted to the second layer structure 112; wherein the first layer structure 111 is configured as a hard layer so that the first layer structure 111 moves toward the battery assembly 3 in accordance with the deformation of the bottom wall, the impact force is transmitted to the bottom wall mating surface 1111, is transmitted to the second layer structure 112 through the first layer structure 111, and contacts the battery assembly 3 by the battery assembly mating surface 1121, distributes the impact force to the upper surface of the first layer structure 111, to reduce the impact force of the impact force in the unit area of the lower surface of the battery assembly 3, and the contact area of the second layer structure 112 and the battery assembly 3 is larger than the contact area of the bottom wall deformation position and the first layer structure 111, the floating plate assembly 1 can disperse the impact force transmitted from the bottom wall to the battery assembly 3, effectively avoiding the concentration of collision impact force, thereby avoiding the damage of the internal parts of the battery component 3 and greatly improving the protection effect of the battery component 3.

The vehicle according to the present invention is briefly described below.

According to the utility model discloses a be provided with battery package 2 of above-mentioned embodiment on the vehicle, because according to the utility model discloses a be provided with battery package 2 of above-mentioned embodiment on the vehicle, this battery package 2 can avoid the concentration of collision impact effectively to the dispersion acts on the collision impact of battery package internals, makes the collision impact can be even transmission to battery package 2 internals on, improved battery package 2 anti collision performance, thereby improved the anti collision ability of vehicle driving in-process, promoted the security that the vehicle travel.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, comprising:

the device comprises a shell, a first fixing piece and a second fixing piece, wherein an accommodating cavity is formed in the shell;

the battery module is arranged in the accommodating cavity;

a floating plate assembly disposed within the receiving cavity and disposed between the bottom wall of the case and the battery module, the floating plate assembly including: a floating plate body, at least a portion of which is configured as a hard layer structure.

2. The battery pack according to claim 1, wherein the battery modules are plural, and the floating plate assembly is opposed to a bottom wall of at least one of the battery modules.

3. The battery pack of claim 1, wherein a plurality of cells are disposed within the battery module, and the float plate assembly is directly opposite the plurality of cells.

4. The battery pack according to claim 1, wherein a plurality of the battery modules are sequentially arranged in a first direction, and the floating plate assembly extends in a second direction.

5. The battery pack according to claim 1, wherein the floating plate assembly is constructed in plurality, and a plurality of the floating plate assemblies are disposed at the lower side of one of the battery modules.

6. The battery pack of claim 5, wherein a plurality of cells are disposed within the battery module, and wherein each of the float plate assemblies is directly opposite a plurality of the cells.

7. The battery pack of claim 6, wherein the cells all extend in a third direction, the plurality of cells in the battery module are sequentially arranged in a fourth direction, and the floating plate assembly extends in the third direction or the fourth direction and is opposite to the plurality of cells.

8. The battery pack of claim 3, wherein the floating plate assembly has a battery assembly mating surface facing the battery module, the battery assembly mating surface having an area larger than a bottom surface of the cell.

9. The battery pack according to claim 8, wherein the floating plate body has a first layer structure and a second layer structure, the first layer structure is stacked on the second layer structure, a surface of the first layer structure facing away from the second layer structure is configured as a bottom wall mating surface, a surface of the second layer structure facing away from the first layer structure is configured as a battery module mating surface, the first layer structure is configured as a hard layer structure, and the second layer structure is configured as an elastic layer structure.

10. A vehicle characterized by comprising the battery pack according to any one of claims 1 to 9.