CN115312938B - Power battery structure and vehicle - Google Patents
Power battery structure and vehicle Download PDFInfo
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- CN115312938B CN115312938B CN202211065451.4A CN202211065451A CN115312938B CN 115312938 B CN115312938 B CN 115312938B CN 202211065451 A CN202211065451 A CN 202211065451A CN 115312938 B CN115312938 B CN 115312938B
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- 239000000498 cooling water Substances 0.000 claims description 11
- 239000011324 bead Substances 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 2
- 210000004027 cell Anatomy 0.000 abstract 6
- 210000003850 cellular structure Anatomy 0.000 abstract 1
- 239000000110 cooling liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 101100290380 Caenorhabditis elegans cel-1 gene Proteins 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000005779 cell damage Effects 0.000 description 1
- 208000037887 cell injury Diseases 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The disclosure provides a power battery structure and a vehicle, and relates to the technical field of power batteries. The power battery structure includes: a floor frame assembly and a battery cell assembly; the floor frame assembly comprises a battery compartment, an auxiliary beam and an anti-bearing plate; the battery cell component is positioned in the battery compartment; the auxiliary beam is longitudinally arranged in the middle of the battery compartment, and two ends of the auxiliary beam are respectively connected with the inner wall of the battery compartment; the anti-bearing plate is positioned above the battery cell assembly, the edge of the anti-bearing plate is connected with the inner wall of the battery compartment and the auxiliary beam respectively, the anti-bearing plate is of a honeycomb structure, and the anti-bearing plate is used for preventing the battery cell assembly from bearing vertical loads. The power battery structure has the advantages that the honeycomb-shaped anti-bearing plate is arranged above the battery cell assembly, the vertical bearing function is achieved, the lateral impact deformation resistance of the floor frame assembly is enhanced, the battery cell assembly is protected, and the service safety and the service life of the battery cell assembly are improved.
Description
Technical Field
The disclosure relates to the technical field of power batteries, and in particular relates to a power battery structure and a vehicle.
Background
With the strong promotion of energy conservation and emission reduction, the electric vehicle is continuously developed, and the battery technology as a main component of the electric vehicle is also rapidly advanced, so that in order To increase the cruising ability of the vehicle, the battery is developed from a small module To a CTP (Cel 1 To Pack, high-integration power battery) and then is developed To a CTC (Cell To Chassis, battery integration), higher integration is realized, and the CTC power battery is gradually becoming a popular battery installation at present.
The CTC power battery is particularly integrated with a vehicle body, namely, the battery is integrated inside an automobile floor frame, so that the charging frequency is reduced for realizing larger endurance mileage, and more electric quantity is arranged in a limited space as much as possible.
However, the cells in the CTC power cells of the related art need to bear load, resulting in deterioration of the use environment of the cells, and increasing the risk of cell damage.
Disclosure of Invention
The disclosure provides a power battery structure and vehicle, can solve the problem that the battery core needs to bear load in CTC power battery, leads to the deterioration of battery core service environment, has increased the risk of battery core damage.
The technical scheme is as follows:
in one aspect, a power cell structure is provided, the power cell structure comprising: a floor frame assembly and a battery cell assembly;
the floor frame assembly comprises a battery compartment, an auxiliary beam and an anti-bearing plate;
the battery cell assembly is positioned in the battery compartment;
the auxiliary beam is longitudinally arranged in the middle of the battery compartment, and two ends of the auxiliary beam are respectively connected with the inner wall of the battery compartment;
the anti-bearing plate is positioned above the battery cell assembly, the edge of the anti-bearing plate is respectively connected with the inner wall of the battery compartment and the auxiliary beam, the anti-bearing plate is of a honeycomb structure, and the anti-bearing plate is used for preventing the battery cell assembly from bearing vertical load.
In some embodiments, the battery compartment comprises two transverse frame beams, two longitudinal frame beams, a bottom plate, and a floor;
the two transverse frame beams and the two longitudinal frame beams are respectively arranged along the transverse direction or the longitudinal direction and then are sequentially connected, the bottom plate is positioned at one side of the battery compartment facing the ground, and the bottom plate is respectively connected with the two transverse frame beams and the two longitudinal frame beams; the floor is positioned at one side of the battery compartment, which is away from the bottom surface, and is respectively connected with the two transverse frame beams and the two longitudinal frame beams;
the auxiliary beams are arranged in parallel with the two longitudinal frame beams, and two ends of each auxiliary beam are connected with the two transverse frame beams respectively.
In some embodiments, the cell assembly comprises a first cell and a second cell, and the load-preventing plate comprises a first plate body and a second plate body;
the first battery cell and the second battery cell are symmetrically arranged in the battery compartment along the auxiliary beam, the first plate body is located above the first battery cell, and the second plate body is located above the second battery cell.
In some embodiments, a first assembling step is arranged on the side surface of the transverse frame beam facing the interior of the battery compartment, a second assembling step is arranged on the side surface of the longitudinal frame beam facing the interior of the battery compartment, and a third assembling step is arranged on the upper surface of the auxiliary beam;
the edge of the anti-bearing plate is respectively connected with the first assembly step, the second assembly step and the third assembly step, and the anti-bearing plate is supported above the battery cell assembly by the first assembly step, the second assembly step and the third assembly step.
In some embodiments, the first assembly step protrudes toward the inside of the battery compartment along the inner side surface of the transverse frame beam, and the top surface of the first assembly step is connected with the anti-bearing plate;
the second assembly step protrudes towards the inside of the battery compartment along the inner side face of the longitudinal frame beam, and the top face of the second assembly step is connected with the anti-bearing plate.
In some embodiments, the upper surface of the transverse frame beam is provided with a first convex rib structure, and the upper surface of the longitudinal frame beam is provided with a second convex rib structure;
the first convex rib structure is positioned at the outer side of the first assembly step, and the second convex rib structure is positioned at the outer side of the second assembly step;
the top surfaces of the first assembly step and the second assembly step are respectively connected with the lower surface of the anti-bearing plate, and the inner side surfaces of the first convex rib structure and the second convex rib structure are respectively connected with the outer side surface of the anti-bearing plate;
the upper surfaces of the first convex rib structure and the second convex rib structure are respectively connected with the lower surface of the floor.
In some embodiments, the height of the upper surfaces of the first and second bead structures is greater than the height of the upper surfaces of the transverse and longitudinal frame beams;
and/or the number of the groups of groups,
the heights of the upper surfaces of the first convex rib structure and the second convex rib structure are larger than the heights of the top surfaces of the first assembling step and the second assembling step.
In some embodiments, the lower surface of the longitudinal frame beam is provided with an inward concave routing channel, and the opening of the routing channel is sealed by a cover plate; the lower surface of vertical frame roof beam still is equipped with the protection rib, the protection rib protrusion extremely the apron spare below.
In some embodiments, a cooling water cavity and a collision buffer cavity are arranged in the bottom plate;
the cooling water cavity is positioned close to the battery compartment and is used for containing and flowing cooling water; the collision buffer cavity is positioned close to the bottom surface and is used for providing bottom collision buffer for the battery cell assembly.
In another aspect, a vehicle is provided that includes the power cell structure of the present disclosure.
The beneficial effects that this disclosure provided technical scheme brought include at least:
the utility model discloses a power battery structure, including floor frame subassembly and electric core subassembly, wherein floor frame subassembly includes the battery compartment, electric core subassembly is located this battery compartment, the middle part of battery compartment has the auxiliary beam, electric core subassembly's top has prevents the loading board, should prevent the loading board and be honeycomb structure, can play vertical bearing function, avoid electric core subassembly to receive vertical load, can also strengthen the lateral shock resistance deformability of floor frame subassembly, can effectively reduce the gravity of power battery structure again, thereby be favorable to protecting electric core subassembly, improve electric core subassembly's safety in utilization and life.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic structural view of a power cell structure provided by an embodiment of the present disclosure;
FIG. 2 is a structural exploded view of a power cell structure provided by an embodiment of the present disclosure;
FIG. 3 is a structural cross-sectional view of a power cell structure provided by an embodiment of the present disclosure;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is an enlarged view of a portion of FIG. 3 at B;
fig. 6 is a partial enlarged view at C in fig. 3.
Reference numerals in the drawings are respectively expressed as:
1. a floor frame assembly;
11. a battery compartment; 12. an auxiliary beam; 13. an anti-bearing plate; 14. a battery cooling liquid channel;
111. a transverse frame beam; 112. a longitudinal frame beam; 113. a bottom plate; 114. a floor;
1111. a first assembly step; 1112. a first rib structure; 1113. a routing channel; 1114. a cover plate member; 1115. protective ribs;
1121. a second assembly step; 1122. a second rib structure;
121. a third assembly step;
131. a first plate body; 132. a second plate body;
1131. a cooling water cavity; 1132. a collision buffer chamber;
2. a cell assembly; 21. a first cell; 22. a second cell;
3. and a wire harness.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
In the description of the present disclosure, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present disclosure and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present disclosure.
Unless defined otherwise, all technical terms used in the embodiments of the present disclosure have the same meaning as commonly understood by one of ordinary skill in the art.
In the prior art, a battery system and a vehicle body chassis system of an electric vehicle are separately connected to form a whole. The battery system is formed by assembling a battery pack with a battery core forming module and assembling the battery pack with a vehicle body floor from the lower part. The advantages of this battery solution include: a. the battery pack consists of a plurality of modules, and each module is provided with an independent shell protection and control unit, so that the control and the thermal management of the battery are facilitated; b. the battery module can be replaced independently, and the maintenance cost and convenience are high.
The disadvantages of the above battery solutions are also evident: a. the weight of the whole module is higher and the space utilization rate is lower due to the shell and the safety gap between the modules; b. each module is provided with a separate control unit, resulting in relatively high costs; c. after the battery system is connected with the vehicle body, the overall thickness is large, the ground clearance of the chassis is affected, and the risk of battery damage is increased in the driving in the future.
The CTC battery scheme is to directly integrate the battery core on the vehicle body, so that the space utilization rate is improved to the greatest extent, that is to say, more batteries can be arranged in the same space, thereby improving the electric quantity of the batteries and achieving the purpose of increasing the endurance mileage. The CTP battery scheme is further integrated, the upper plate and the lower plate of the floor are completely used for replacing the battery shell and the cover plate, and the CTP battery scheme is designed integrally with the floor and the chassis of the vehicle body, so that the installation form of the battery is fundamentally changed.
Advantages of CTC battery schemes include: a. the space utilization rate is greatly improved; b. the structural part of the battery pack is omitted, and the weight is reduced; c. high integration and modularity can be achieved.
However, CTC battery schemes also suffer from the following drawbacks: a. the battery cell needs to be used as a part of the structural part to bear load, and how to fix the battery cell with the upper and lower structural parts needs to be considered so as to cope with the most severe shearing force; b. the process has higher requirements, if the manufacturing is disqualified, the whole battery is scrapped, and the maintainability is low; c. the battery system needs to be designed with the vehicle body floor and the chassis in an integrated high standard way, and the outer frame structure of the battery is the structure of the vehicle body chassis, so that the design and processing difficulty is increased.
In the related art, a plurality of cross beams are generally required to be adopted in the internal structure of the power battery, so that the layout space of the battery cells is occupied, the arrangement quantity of the battery cells is influenced, the endurance mileage of an automobile is influenced, the battery cells are required to bear loads, the service environment of the battery cells is deteriorated, and the risk of damaging the battery cells is increased; the cell is sealed only by clamping sealant on the upper contact plane and the lower contact plane; in addition, the water path and the low-voltage line of the front bin and the rear bin are interacted, and the layout channel of the low-voltage line is not clear.
Therefore, the present disclosure provides a power battery structure, the middle part of battery compartment has the auxiliary beam, and the top of electric core subassembly has the honeycomb shape and prevents the loading board, plays vertical bearing function, strengthens the impact deformation ability of floor frame subassembly side direction to be favorable to protecting electric core subassembly, improve electric core subassembly's safety in utilization and life.
For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a power cell structure provided by an embodiment of the present disclosure; fig. 2 is a structural exploded view of a power cell structure provided by an embodiment of the present disclosure.
In one aspect, as shown in fig. 1 and 2, the present embodiment provides a power battery structure, which includes: a floor frame assembly 1, a cell assembly 2 and an anti-load board 13.
The floor frame assembly 1 comprises a battery compartment 11, an auxiliary beam 12 and an anti-loading plate 13; the battery cell assembly 2 is positioned in the battery compartment 11; the auxiliary beam 12 is longitudinally arranged in the middle of the battery compartment 11, and two ends of the auxiliary beam are respectively connected with the inner wall of the battery compartment 11; the anti-bearing plate 13 is located above the battery cell assembly 2, the edge of the anti-bearing plate 13 is connected with the inner wall of the battery compartment 11 and the auxiliary beam 12 respectively, the anti-bearing plate 13 is of a honeycomb structure, and the anti-bearing plate 13 is used for preventing the battery cell assembly 2 from bearing vertical loads.
The power battery structure of this embodiment, including floor frame assembly 1 and electric core subassembly 2, wherein floor frame assembly 1 includes battery compartment 11, electric core subassembly 2 is located this battery compartment 11, the middle part of battery compartment 11 has auxiliary beam 12, the top of electric core subassembly 2 has prevents loading board 13, this prevents loading board 13 is honeycomb structure, can play vertical bearing function, avoid electric core subassembly 2 to receive vertical load, can also strengthen the lateral shock resistance deformability of floor frame assembly 1, can effectively reduce the gravity of power battery structure again, thereby be favorable to protecting electric core subassembly 2, improve the safety in utilization and the life of electric core subassembly 2.
The power battery structure of this embodiment integrates the battery cell assembly 2 with the floor 114 of the vehicle, thereby improving the accommodation volume of the battery compartment 11, and accommodating more battery cells at the same time, thereby being beneficial to improving the battery capacity and achieving the effect of increasing the endurance mileage.
For the internal space of the battery compartment 11, the power battery structure of the embodiment only internally arranges an auxiliary beam 12, and the cross-shaped design of the transverse longitudinal beams is omitted, so that the space occupied by a plurality of beam bodies is saved, and the space utilization rate of the battery compartment 11 is improved.
For the problem that the strength of the floor frame assembly 1 is reduced after the inner transverse beams of the battery compartment 11 are cancelled, optionally, the longitudinal beam body in the floor frame assembly 1 is partially thickened, and the strength of the longitudinal beam body is improved by utilizing the partially thickened design.
Illustratively, the material of the upper and outer sides of the longitudinal beams is thickened so that the overall strength of the floor frame assembly 1 can be unaffected.
In some possible implementations, the anti-bearing plate 13 is provided with through holes arranged in an array, so that the anti-bearing plate 13 presents a honeycomb shape.
Illustratively, the shape of the through-holes includes, but is not limited to, circular holes, oval holes, square holes, elongated holes, and the like. Alternatively, the load preventing plate 13 is manufactured using a stamping process.
Another example is that the lower surface of the anti-bearing plate 13 is spaced from the upper surface of the cell assembly 2, so that the anti-bearing plate 13 has a certain space for buffering downward deformation, and thus the lower cell assembly 2 can be better protected.
In some possible implementations, the floor frame assembly 1 is provided with a battery cooling liquid channel 14, and battery cooling liquid can be introduced into the battery compartment 11 through the battery cooling liquid channel 14 to control the temperature of the battery cell assembly 2, so that the use safety of the battery cell assembly 2 is improved.
As shown in connection with fig. 1, 2, in some embodiments, the battery compartment 11 includes two transverse frame beams 111, two longitudinal frame beams 112, a bottom plate 113, and a floor 114.
The two transverse frame beams 111 and the two longitudinal frame beams 112 are respectively arranged along the transverse direction or the longitudinal direction and then are sequentially connected, the bottom plate 113 is positioned on one side of the battery compartment 11 facing the ground, and the bottom plate 113 is respectively connected with the two transverse frame beams 111 and the two longitudinal frame beams 112; the floor 114 is located on the side of the battery compartment 11 facing away from the floor, and the floor 114 is connected to two transverse frame beams 111 and two longitudinal frame beams 112, respectively.
The auxiliary beam 12 is arranged in parallel with the two longitudinal frame beams 112, and both ends of the auxiliary beam 12 are connected with the two transverse frame beams 111, respectively.
The battery compartment 11 of the present embodiment is enclosed by two transverse frame beams 111 and two longitudinal frame beams 112 to form a circumferential frame, and the floor 114 and the bottom plate 113 are respectively covered on the upper and lower sides of the circumferential frame, thereby forming a closed battery compartment 11. Inside the battery compartment 11, auxiliary beams 12 are arranged in the middle in the longitudinal direction, connected to two lateral frame beams 111, respectively, the auxiliary beams 12 serving to strengthen the floor frame assembly 1.
The longitudinal direction is a direction parallel to the head-to-tail direction of the vehicle, the lateral direction is a lateral direction of the vehicle, and the vertical direction is a direction perpendicular to the ground.
In some possible implementations, the lower surface of the bottom plate 113 is flush with the lower surfaces of the longitudinal frame beams 112 and the transverse frame beams 111, thereby ensuring that the bottom plate 113 is not stressed alone while maximizing the utilization of the vertical dimension.
The periphery of the bottom plate 113 is welded to the inner side surfaces of the transverse frame beams 111 and the longitudinal frame beams 112. It should be noted that, before the battery module 2 and the floor 114 are assembled, the upper and lower ends of the circumferential side surfaces of the bottom plate 113 are required to be symmetrically welded, so as to ensure the welding tightness of the bottom plate 113 and the inner side surfaces of the transverse frame beams 111 and the longitudinal frame beams 112.
Fig. 3 is a structural cross-sectional view of a power cell structure provided by an embodiment of the present disclosure.
As shown in connection with fig. 2 and 3, in some embodiments, the cell assembly 2 includes a first cell 21 and a second cell 22, and the load preventing plate 13 includes a first plate 131 and a second plate 132; the first electric core 21 and the second electric core 22 are symmetrically arranged in the battery compartment 11 along the auxiliary beam 12, the first plate 131 is located above the first electric core 21, and the second plate 132 is located above the second electric core 22.
The auxiliary beam 12 of the present embodiment is longitudinally disposed in the middle of the battery compartment 11, dividing the battery compartment 11 into two parts, so that the first and second electric cores 21 and 22 can be disposed in the two parts of the battery compartment 11, respectively, and the first and second plate bodies 131 and 132 are disposed above the first and second electric cores 21 and 22, respectively, to perform vertical load-resisting protection on each electric core.
The anti-bearing plate 13 is divided into a first plate body 131 and a second plate body 132 with smaller areas, thereby being beneficial to improving the strength and bearing capacity of each plate body.
Fig. 4 is a partial enlarged view of fig. 3 at a, showing the assembled structure of the lateral frame beams 111 and the longitudinal frame beams 112 with the load preventing plate 13. Fig. 5 is a partial enlarged view of fig. 3 at B, showing the assembled structure of the auxiliary girder 12 and the load preventing plate 13.
As shown in connection with fig. 4 and 5, in some embodiments, the lateral frame beam 111 is provided with a first assembling step 1111 on the side facing the inside of the battery compartment 11, the longitudinal frame beam 112 is provided with a second assembling step 1121 on the side facing the inside of the battery compartment 11, and the auxiliary beam 12 is provided with a third assembling step 121 on the upper surface.
The edges of the load preventing plate 13 are connected with the first, second and third assembly steps 1111, 1121 and 121, respectively, and the first, second and third assembly steps 1111, 1121 and 121 support the load preventing plate 13 above the cell assembly 2.
Illustratively, the load-preventing plate 13 is mounted on the first, second and third mounting steps 1111, 1121 and 121 and then reinforced by welding, so that the load-preventing plate 13 is rigidly connected to the floor frame assembly 1, and the load-preventing plate 13 can better realize the capability of carrying vertical load and side load.
By mounting and rigidly connecting the load-preventing plate 13 to the first, second and third assembly steps 1111, 1121, 121, rigid connection of the peripheral edges of the load-preventing plate 13 is achieved, and the reliability of connection of the load-preventing plate 13 to the floor frame assembly 1 is high, providing good protection against vertical or lateral loads.
As shown in connection with fig. 6, in some embodiments, the first fitting step 1111 protrudes toward the inside of the battery compartment 11 along the inner side surface of the lateral frame member 111, and the top surface of the first fitting step 1111 is connected to the load preventing plate 13.
The second fitting step 1121 protrudes toward the inside of the battery compartment 11 along the inner side surface of the longitudinal frame rail 112, and the top surface of the second fitting step 1121 is connected to the load preventing plate 13.
The first assembling step 1111 and the second assembling step 1121 serve to support the anti-bearing plate 13, and by means of protruding the transverse frame beam 111 or the longitudinal frame beam 112 towards the inner side of the battery compartment 11, the reserved gap between the inner wall of the battery compartment 11 and the battery cell assembly 2 is fully utilized, and damage to the rigidity sections of the transverse frame beam 111 and the longitudinal frame beam 112 can be avoided, so that the transverse frame beam 111 and the longitudinal frame beam 112 maintain good rigidity.
In some possible implementations, the cross-sectional shapes of the first fitting step 1111 and the second fitting step 1121 include, but are not limited to, right triangle, right trapezoid, rectangle, and the like.
Illustratively, the second fitting step 1121 has a right trapezoid shape in cross section, with right angle sides of the right trapezoid being located on the top surface for contact supporting the load preventing plate 13. The lower base (longer side) of the right trapezoid is connected to the inner side surface of the battery compartment 11 (i.e., the inner side surface of the longitudinal frame beam 112), and the connection area between the two is increased. In addition, the other side of the right trapezoid is supported obliquely on the inner side surface of the battery compartment 11, which is advantageous in improving the carrying capacity of the second fitting step 1121.
In another possible implementation, the second mounting step 1121 is integrally formed with the longitudinal frame rail 112, such as integrally extrusion, integrally melt cast imaging, or the like.
In some embodiments, as shown in connection with fig. 6, the upper surface of the two longitudinal frame beams 112 and the outer side facing away from the battery compartment 11 have a material thickness d in the range of 5mm-10mm.
The material thickness d of the upper surfaces and the outer side surfaces of the two longitudinal frame beams 112 meets the above value, so that the rigidity of the longitudinal frame beams 112 can be enhanced, and the rigidity loss of a plurality of cross beams in the battery compartment 11 can be made up.
As shown in connection with fig. 6, in some embodiments, the upper surface of the transverse frame beam 111 is provided with a first rib structure 1112, and the upper surface of the longitudinal frame beam 112 is provided with a second rib structure 1122; the first rib structure 1112 is located outside the first fitting step 1111 and the second rib structure 1122 is located outside the second fitting step 1121.
The top surfaces of the first assembling step 1111 and the second assembling step 1121 are respectively connected with the lower surface of the anti-bearing plate 13, and the inner side surfaces of the first rib structure 1112 and the second rib structure 1122 are respectively connected with the outer side surface of the anti-bearing plate 13.
The upper surfaces of the first and second rib structures 1112 and 1122 are respectively connected to the lower surface of the floor 114.
The upper surfaces of the transverse frame beams 111 and the longitudinal frame beams 112 of the embodiment are connected with a floor 114, the area of the floor 114 is larger than that of the battery compartment 11, and the periphery is respectively connected with the transverse frame beams 111 and the longitudinal frame beams 112 to realize the sealing of the battery compartment 11.
The first rib structure 1112 and the second rib structure 1122 form a sealed bead around the opening of the battery compartment 11, thereby providing a double seal when connected to the floor 114.
As shown in connection with fig. 6, in some embodiments, the height of the upper surfaces of the first and second bead structures 1112, 1122 is greater than the height of the upper surfaces of the transverse and longitudinal frame beams 111, 112.
In other embodiments, the height of the upper surfaces of the first and second bead structures 1112, 1122 is greater than the height of the top surfaces of the first and second fitting steps 1111, 1121.
In other embodiments, the height of the upper surfaces of the first and second bead structures 1112, 1122 is greater than the height of the upper surfaces of the transverse and longitudinal frame beams 111, 112, and the height of the top surfaces of the first and second fitting steps 1111, 1121.
In other embodiments, the heights of the upper surfaces of the first and second bead structures 1112, 1122 are greater than the heights of the upper surfaces of the transverse and longitudinal frame beams 111, 112, and the heights of the upper surfaces of the transverse and longitudinal frame beams 111, 112 are greater than the heights of the top surfaces of the first and second fitting steps 1111, 1121.
Referring to fig. 6, in some embodiments, the lower surface of the longitudinal frame beam 112 is provided with an inwardly recessed routing channel 1113, and the opening of the routing channel 1113 is sealed by a cover member 1114; the lower surface of the longitudinal frame beam 112 is provided with a protective rib 1115, and the protective rib 1115 protrudes below the cover member 1114.
In the power battery structure of the embodiment, the wiring channel 1113 is formed on the lower surface of the longitudinal frame beam 112, so that a layout space is provided for water, electricity and the like in the front and rear cabins of the vehicle, and the problem of difficult wiring in the front and rear cabins in the CTC battery scheme is solved.
The routing channel 1113 is concavely arranged in the longitudinal frame beam 112 and is sealed by the cover plate 1114, and the wire harness in the routing channel 1113 has high safety and good concealment, so that the appearance effect of the bottom is improved.
The protection ribs 1115 arranged on the lower surface of the longitudinal frame beam 112 protrude below the cover plate 1114 and can serve as a stress fulcrum of vertical load to prevent the cover plate 1114 from being damaged by stress.
In some possible implementations, at least one wire harness is disposed within the routing channel 1113, and the at least one wire harness is connected to an inner wall of the routing channel 1113 by a snap bolt. Illustratively, the wiring harness includes, but is not limited to, a low voltage circuit harness, a cooling water circuit, and the like.
As shown in connection with fig. 6, in some embodiments, a cooling water cavity 1131 and a collision buffer cavity 1132 are provided within the base plate 113; the cooling water chamber 1131 is located near the battery compartment 11 and is used for containing and flowing cooling water; the crash cushion cavity 1132 is located near the bottom surface for providing a bottom crash cushion for the cell assembly 2. So that the bottom plate 113 can provide excellent cooling and collision protection functions to the power cells under.
In another aspect, the present embodiment provides a vehicle including the power cell structure of the present disclosure.
The vehicle of the present embodiment adopts the power battery structure of the present disclosure, and has all the technical effects of the present disclosure.
In the vehicle of the embodiment, the power battery and the vehicle body are directly assembled integrally, a battery pack assembly is not required to be assembled in advance, and the battery pack assembly is not required to be transported to the vehicle body for assembly, so that the transportation cost and the secondary assembly link are effectively reduced; and the redundant structure can be effectively reduced, so that the problems of inconvenient transportation of the battery pack, structural redundancy and the like caused by non-integral connection of the battery pack and a vehicle body are solved.
It should be noted that references herein to "a number", "at least one" means one or more, and "a plurality", "at least two" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
In the description of the present disclosure, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this disclosure, unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples" means 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 disclosure.
The foregoing description of the embodiments of the present disclosure is not intended to limit the present disclosure, but rather, any modifications, equivalents, improvements, etc. that fall within the principles of the present disclosure are intended to be included within the scope of the present disclosure.
Claims (9)
1. A power cell structure, characterized in that the power cell structure comprises: a floor frame assembly (1) and a battery cell assembly (2);
the floor frame assembly (1) is of a part of the structure of the chassis of the vehicle body, and the floor frame assembly (1) comprises a battery compartment (11), an auxiliary beam (12) and an anti-bearing plate (13);
the battery compartment (11) comprises two transverse frame beams (111), two longitudinal frame beams (112), a bottom plate (113) and a floor (114);
the two transverse frame beams (111) and the two longitudinal frame beams (112) are respectively arranged along the transverse direction or the longitudinal direction and then are sequentially connected, the bottom plate (113) is positioned on one side of the battery compartment (11) facing the ground and is formed into a bottom plate of the vehicle body chassis, and the bottom plate (113) is respectively connected with the two transverse frame beams (111) and the two longitudinal frame beams (112);
the floor (114) is positioned on one side of the battery compartment (11) away from the bottom surface and is formed into the floor of the vehicle body chassis, and the floor (114) is respectively connected with the two transverse frame beams (111) and the two longitudinal frame beams (112);
the battery cell assembly (2) is positioned in the battery compartment (11);
the auxiliary beam (12) is longitudinally arranged in the middle of the battery compartment (11), and two ends of the auxiliary beam are respectively connected with the inner wall of the battery compartment (11);
the lateral frame beam (111) is provided with a first assembling step (1111) towards the side surface inside the battery compartment (11), the longitudinal frame beam (112) is provided with a second assembling step (1121) towards the side surface inside the battery compartment (11), and the upper surface of the auxiliary beam (12) is provided with a third assembling step (121);
the edges of the anti-bearing plate (13) are respectively connected with the first assembling step (1111), the second assembling step (1121) and the third assembling step (121), and the first assembling step (1111), the second assembling step (1121) and the third assembling step (121) support the anti-bearing plate (13) above the battery cell assembly (2);
the anti-bearing plate (13) is of a honeycomb structure, the anti-bearing plate (13) is used for preventing the battery cell assembly (2) from bearing vertical load, and the lower surface of the anti-bearing plate (13) and the upper surface of the battery cell assembly (2) are arranged at intervals, so that the anti-bearing plate (13) has a space for buffering downward deformation.
2. The power cell structure of claim 1, wherein,
the auxiliary beams (12) are arranged in parallel with the two longitudinal frame beams (112), and two ends of the auxiliary beams (12) are respectively connected with the two transverse frame beams (111).
3. The power cell structure according to claim 2, wherein the cell assembly (2) comprises a first cell (21) and a second cell (22), and the load-preventing plate (13) comprises a first plate body (131) and a second plate body (132);
the first battery cell (21) and the second battery cell (22) are symmetrically arranged in the battery compartment (11) along the auxiliary beam (12), the first plate body (131) is located above the first battery cell (21), and the second plate body (132) is located above the second battery cell (22).
4. The power battery structure according to claim 2, characterized in that the first fitting step (1111) protrudes toward the inside of the battery compartment (11) along the inner side surface of the lateral frame beam (111), and the top surface of the first fitting step (1111) is connected with the load preventing plate (13);
the second assembling step (1121) protrudes towards the inside of the battery compartment (11) along the inner side surface of the longitudinal frame beam (112), and the top surface of the second assembling step (1121) is connected with the anti-bearing plate (13).
5. The power battery structure according to claim 1, wherein the upper surface of the transverse frame beam (111) is provided with a first rib structure (1112), and the upper surface of the longitudinal frame beam (112) is provided with a second rib structure (1122);
the first rib structure (1112) is located outside the first assembly step (1111), and the second rib structure (1122) is located outside the second assembly step (1121);
the top surfaces of the first assembling step (1111) and the second assembling step (1121) are respectively connected with the lower surface of the anti-bearing plate (13), and the inner side surfaces of the first convex rib structure (1112) and the second convex rib structure (1122) are respectively connected with the outer side surface of the anti-bearing plate (13);
the upper surfaces of the first raised rib structure (1112) and the second raised rib structure (1122) are respectively connected with the lower surface of the floor (114).
6. The power cell structure of claim 5, wherein the height of the upper surfaces of the first and second bead structures (1112, 1122) is greater than the height of the upper surfaces of the transverse frame beams (111, 112);
and/or the number of the groups of groups,
the height of the upper surfaces of the first and second bead structures (1112, 1122) is greater than the height of the top surfaces of the first and second fitting steps (1111, 1121).
7. The power cell structure according to claim 2, wherein the lower surface of the longitudinal frame beam (112) is provided with an inwardly recessed routing channel (1113), and an opening of the routing channel (1113) is sealed by a cover member (1114); the lower surface of the longitudinal frame beam (112) is also provided with a protection rib (1115), and the protection rib (1115) protrudes below the cover plate piece (1114).
8. The power battery structure according to claim 2, characterized in that a cooling water cavity (1131) and a collision buffer cavity (1132) are provided in the bottom plate (113);
the cooling water cavity (1131) is positioned near the battery compartment (11) and is used for containing and flowing cooling water; the collision buffer cavity (1132) is located near the bottom surface and is used for providing collision buffer for the bottom of the battery cell assembly (2).
9. A vehicle, characterized in that it comprises a power cell structure according to any one of claims 1-8.
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| CN202211065451.4A CN115312938B (en) | 2022-09-01 | 2022-09-01 | Power battery structure and vehicle |
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