CN109728219B - Battery pack for vehicle - Google Patents
Battery pack for vehicle Download PDFInfo
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- CN109728219B CN109728219B CN201811631972.5A CN201811631972A CN109728219B CN 109728219 B CN109728219 B CN 109728219B CN 201811631972 A CN201811631972 A CN 201811631972A CN 109728219 B CN109728219 B CN 109728219B
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- module
- reinforcing
- plate portion
- battery
- battery pack
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The present invention provides a battery pack for a vehicle, the battery pack for the vehicle including: the battery module comprises a lower shell, a battery module and a reinforcing beam. The battery module is arranged on the lower shell and is provided with a module body and a module end plate, and the module end plate is arranged at least one end of the module body; the reinforcement beam is fixed to the lower case, the reinforcement beam is fixed to the module end plate, and the reinforcement beam extends upward and at least partially overlaps the module end plate in a height direction of the battery module. From this, through casing, battery module and stiffening beam cooperation down, can be in the same place module end plate and stiffening beam integration, can make the structure of battery package compacter, also can increase the height of stiffening beam to can promote the rigidity and the intensity of stiffening beam, battery package, and, can also make the battery package lightweight more, be favorable to the promotion of the weight reduction of battery package and quality energy density.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a battery pack of a vehicle.
Background
Lithium ion power batteries are widely applied to various aspects of life, serve as an important development direction of future green energy, have the advantages of higher energy density, small self-discharge, long cycle life and the like compared with lead-acid batteries, nickel-metal hydride batteries and nickel-cadmium batteries, and are currently widely applied to the fields of consumer electronics and power energy storage. In recent years, the demand for applications, particularly in the field of power storage, has increased dramatically, for example: electric automobiles, large-scale energy storage power stations, large-scale mobile energy storage equipment and the like.
In the development process of the power battery pack of the electric automobile, the requirements of vibration, impact, safety and reliable durability and the related requirements of matching of the whole automobile on the first-order dominant frequency of the battery pack are required to be met. Generally speaking, the stiffening beam on the lower shell of the battery pack needs to have good rigidity and strength so as to improve the first-order main frequency of the whole pack and ensure that the power battery pack can pass the detection of a vibration test and an impact test.
In the related art, the battery pack is usually disposed under the vehicle body, and in order to ensure the passing performance of the whole vehicle, the height adjustable range of the battery pack is limited, and even the battery pack is recompressed. In the design process, in order to ensure the rigidity and strength of the reinforcing beam on the lower shell, the module mounting beam and the reinforcing beam need to be widened and thickened.
The existing design mode is limited by the requirement of the trafficability characteristic of the whole vehicle, the rigidity and the strength of the upper reinforcing beam of the lower shell are required to be improved, the height of the beam cannot be increased (actually, the most effective method is adopted), and the width and the plate thickness of the beam can be increased only, so that the effect of the reinforcing scheme is poor, and the mechanical performance improvement and the light weight of a battery pack are not facilitated. And, module and lower casing design respectively, it is poor to become in groups efficiency, is difficult to reduce whole package quality, and whole package quality energy density promotes the difficulty. Meanwhile, for wiring and water cooling systems, the reinforcing beam is broken, and a break point is formed on a main force transmission path, so that the performance of the structure is seriously affected.
Disclosure of Invention
In view of the above, the present invention is directed to a battery pack for a vehicle, so as to solve the problem of poor rigidity and strength of a reinforcing beam and the battery pack.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a battery pack for a vehicle includes: the battery module is arranged on the lower shell and provided with a module body and a module end plate, and the module end plate is arranged at least one end of the module body; the reinforcement beam is fixed to the lower case, the reinforcement beam is fixed to the module end plate, and the reinforcement beam extends upward and at least partially overlaps the module end plate in a height direction of the battery module.
In some examples of the invention, the module end plate has a recessed space, and the reinforcement beam extends upward and at least partially into the recessed space.
In some examples of the invention, the module end plate comprises: and an upper plate portion provided on the lower plate portion, the upper plate portion protruding the lower plate portion toward a direction away from the battery module, thereby forming the recessed space between a lower side of the upper plate portion and an outer side surface of the lower plate portion.
In some examples of the invention, a lower surface of the upper plate portion is supported on an upper surface of the reinforcement beam, and the reinforcement beam and the upper plate portion are fastened to each other by a fastener penetrating both.
In some examples of the invention, the reinforcement beam protrudes the upper plate portion in a direction away from the battery module.
In some examples of the present invention, the reinforcement beam extends in the width direction of the battery module to protrude from the same side face of the module end plate.
In some examples of the present invention, the upper plate portion has a thickness greater than that of the lower plate portion, and an inner side surface of the upper plate portion is flush with an inner side surface of the lower plate portion.
In some examples of the invention, a dimension of the upper plate portion in a height direction of the battery module is substantially identical to a dimension of the lower plate portion in the height direction.
In some examples of the present invention, the battery pack for a vehicle further includes: the reinforcing plate is provided with a plurality of first lightening holes, the plurality of first lightening holes penetrate through the reinforcing plate, and the plurality of first lightening holes are arranged in the length direction of the reinforcing plate and are spaced apart.
In some examples of the present invention, the battery pack for a vehicle further includes: the reinforcing plate is provided with a plurality of first lightening holes which penetrate through the reinforcing plate, and the plurality of first lightening holes are arranged in the length direction of the reinforcing plate and are spaced apart; the reinforcing beam is provided with a plurality of second lightening holes, the second lightening holes penetrate through the reinforcing beam, the second lightening holes are arranged in the length direction of the reinforcing plate and are spaced, and the first lightening holes and the second lightening holes are arranged in a one-to-one correspondence mode.
Compared with the prior art, the battery pack of the vehicle has the following advantages:
according to the vehicle battery pack, the lower shell, the battery module and the reinforcing beam are matched, the module end plate and the reinforcing beam can be integrated, the structure of the battery pack can be more compact, the height of the reinforcing beam can be increased, the rigidity and the strength of the reinforcing beam and the battery pack can be improved, the battery pack can be lighter, and the weight reduction and the improvement of mass energy density of the battery pack are facilitated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of a battery module according to an embodiment of the present invention;
fig. 2 is a top view of a battery module according to an embodiment of the present invention;
fig. 3 is a front view of a battery module according to an embodiment of the present invention;
fig. 4 is a side view of a battery module according to an embodiment of the present invention.
Description of reference numerals:
a lower case 1;
a battery module 2; a module body 21; a module end plate 22; a recessed space 23; a lower plate portion 24; an upper plate portion 25;
a reinforcing beam 3; second lightening holes 31;
a fastener 4;
a reinforcing plate 5; first lightening holes 51;
a water cooling system 6.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 4, a battery pack for a vehicle according to an embodiment of the present invention includes: the battery pack includes a lower case 1, a battery module 2, and a reinforcing beam 3. Battery module 2 can set up in casing 1 down, and battery module 2 can have module body 21 and module end plate 22, and module end plate 22 can set up in the at least one end of module body 21, and it should be noted that module end plate 22 can only set up in the left end of module body 21, also can only set up in the right-hand member of module body 21, can also set up simultaneously in the left end and the right-hand member of module body 21. The reinforcement beam 3 may be fixed to the lower case 1, the reinforcement beam 3 may be fixedly connected to the module end plate 22, the reinforcement beam 3 extends upward, and the reinforcement beam 3 and the module end plate 22 at least partially overlap in the height direction of the battery module 2.
Wherein, the stiffening beam 3 is not only the installation beam of the battery module 2, but also the stiffening beam 3 of the lower shell 1, the stiffening beam 3, the installation beam of the battery module 2 and the module end plate 22 can be integrated together by overlapping the stiffening beam 3 and the module end plate 22 in the height direction of the battery module 2, the structure of the battery pack can be more compact, and the module end plate 22 and the cell connecting part have the same height, so the arrangement can ensure the connecting reliability of the module end plate 22 and the cell, and can also make the height of the stiffening beam 3 higher, can improve the stiffness and strength of the stiffening beam 3 and the battery pack, thereby can provide sufficient protective capability for the thermal expansion of the cell, meanwhile, the stiffening beam 3 and the module end plate 22 are overlapped, the height of the module end plate 22 can be reduced, the weight of the module end plate 22 can be reduced, thereby the battery pack can be more light, the weight reduction and the improvement of the mass energy density of the battery pack are facilitated.
From this, through casing 1, battery module 2 and stiffening beam 3 cooperation down, can be in the same place module end plate 22 and stiffening beam 3 integration, can make the structure of battery package compacter, also can increase the height of stiffening beam 3 to can promote the rigidity and the intensity of stiffening beam 3, battery package, and, can also make the battery package more lightweight, be favorable to the promotion of the weight reduction of battery package and quality energy density.
In some embodiments of the present invention, as shown in fig. 3, the module end plate 22 may have a recessed space 23, the reinforcement beam 3 extends upwards, and the reinforcement beam 3 at least partially extends into the recessed space 23, so as to reserve a space for the height of the reinforcement beam 3, thereby achieving the working purpose of overlapping the reinforcement beam 3 and the module end plate 22, and further increasing the height of the reinforcement beam 3.
In some embodiments of the present invention, as shown in fig. 1-4, the module end plate 22 may include: a lower plate portion 24 and an upper plate portion 25 provided on the lower plate portion 24, the upper plate portion 25 projecting toward a direction away from the battery module 2 toward the lower plate portion 24, it being explained that, taking the case of being located in the left-side module end plate 22 as an example, the upper plate portion 25 located in the left-side module end plate 22 projects toward the left toward the lower plate portion 24, so that the recessed space 23 can be formed below the upper plate portion 25 and between the outer side surfaces of the lower plate portion 24.
In some embodiments of the invention, the lower surface of the upper plate portion 25 is supported on the upper surface of the reinforcement beam 3, and the reinforcement beam 3 and the upper plate portion 25 are fastened to each other by fasteners 4 penetrating both. The fastening member 4 may be a bolt, and the reinforcing beam 3 and the upper plate 25 may be provided with a connecting hole, and the bolt may simultaneously pass through the connecting holes of the reinforcing beam 3 and the upper plate 25 to assemble the reinforcing beam 3 and the upper plate 25 together.
In some embodiments of the present invention, the reinforcing beam 3 protrudes out of the upper plate portion 25 towards a direction away from the battery module 2, it should be noted that, taking the reinforcing beam 3 located on the left side of the battery module 2 as an example, the reinforcing beam 3 protrudes out of the upper plate portion 25 towards the left side, wherein when the battery cell expands, the battery cell applies an expansion force to the module end plate 22, and the arrangement enables the lower surface of the upper plate portion 25 to be located on the upper surface of the reinforcing beam 3 all the time, so that the reinforcing beam 3 can better support the upper plate portion 25, the module end plate 22 can better resist the expansion force of the battery cell, and the module end plate 22 can be prevented from being damaged.
In some embodiments of the present invention, the reinforcing beam 3 extends to protrude from the same side surface of the module end plate 22 in the width direction of the battery module 2, wherein when the battery cell expands, the battery cell applies an expansion force to the module end plate 22, such an arrangement can further ensure that the lower surface of the upper plate portion 25 is always located on the upper surface of the reinforcing beam 3, so that the reinforcing beam 3 can better support the upper plate portion 25, and thus can better resist the impact load in the front-back direction of the battery cell.
In some embodiments of the present invention, the thickness of the upper plate portion 25 is greater than that of the lower plate portion 24, and the inner side surface of the upper plate portion 25 is flush with the inner side surface of the lower plate portion 24, so that the connection strength between the upper plate portion 25 and the reinforcement beam 3 can be ensured, the connection between the upper plate portion 25 and the reinforcement beam 3 can be more reliable, and the inner side surface of the upper plate portion 25 and the inner side surface of the lower plate portion 24 are in one plane, so that the module end plate 22 can be better assembled with a battery cell, and the structural strength of the battery module 2 can be improved.
In some embodiments of the present invention, the dimension of the upper plate portion 25 in the height direction of the battery module 2 is substantially identical to the dimension of the lower plate portion 24 in the height direction of the battery module 2, so that the arrangement can ensure the structural strength of the upper plate portion 25 and the lower plate portion 24, can prevent the upper plate portion 25 and the lower plate portion 24 from being broken, and can make the size of the module end plate 22 more reasonable.
In some embodiments of the present invention, as shown in fig. 1 to 4, the battery pack may further include: reinforcing plate 5, the one end of reinforcing plate 5 links to each other with stiffening beam 3's lateral wall, and reinforcing plate 5's the other end links to each other with casing 1 down, so set up and to make reinforcing plate 5, casing 1, stiffening beam 3 enclose into a triangle-shaped chamber jointly down, through setting up the structural stability that reinforcing plate 5 can promote stiffening beam 3, can better resist electric core bulging force and fore-and-aft direction's impact load.
Furthermore, the reinforcing plate 5 may be provided with a plurality of first lightening holes 51, the plurality of first lightening holes 51 penetrate through the reinforcing plate 5, and the plurality of first lightening holes 51 are arranged in the length direction of the reinforcing plate 5 and spaced apart from each other, wherein the shape of the first lightening holes 51 may be semi-elliptical, so that the weight of the reinforcing plate 5 may be reduced, the battery pack may be more lightweight, and meanwhile, it may be ensured that the wiring harness and the water cooling system 6 are arranged with a sufficient space without forming a break point on a main force transmission path, and the compression resistance of the material may be fully utilized, and it may be ensured that the rigidity and the bending resistance of the reinforcing beam 3 may not be reduced.
In some embodiments of the present invention, as shown in fig. 1 to 4, the battery pack may further include: and a reinforcing plate 5, one end of the reinforcing plate 5 being connected to an outer sidewall of the reinforcing beam 3, the other end of the reinforcing plate 5 being connected to the lower casing 1, the reinforcing plate 5 may be provided with a plurality of first lightening holes 51, the plurality of first lightening holes 51 penetrating the reinforcing plate 5, the plurality of first lightening holes 51 being arranged and spaced apart in a length direction of the reinforcing plate 5. The reinforcing beam 3 can be provided with a plurality of second lightening holes 31, the plurality of second lightening holes 31 penetrate through the reinforcing beam 3, the plurality of second lightening holes 31 are arranged in the length direction of the reinforcing plate 5 and are spaced, the plurality of first lightening holes 51 and the plurality of second lightening holes 31 are arranged in a one-to-one correspondence manner, wherein the first lightening holes 51 and the second lightening holes 31 can be correspondingly arranged in the left and right directions, and the shape of the second lightening holes 31 can be semi-elliptical, so that the weight of the reinforcing beam 3 can be reduced, the lightweight design of the battery pack can be further realized, meanwhile, the arrangement of the wire harness and the water cooling system 6 can be further ensured to have enough space, no break point can be formed on a main force transmission path, the compression resistance of materials can be fully utilized, and the rigidity and the bending resistance of the reinforcing beam 3 can be further ensured not to be reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A battery pack for a vehicle, comprising:
a lower case (1);
the battery module (2) is arranged on the lower shell (1), the battery module (2) is provided with a module body (21) and a module end plate (22), and the module end plate (22) is arranged on at least one end of the module body (21);
a reinforcement beam (3), the reinforcement beam (3) being fixed to the lower case (1), the reinforcement beam (3) being fixed to the module end plate (22), and the reinforcement beam (3) extending upward and at least partially overlapping the module end plate (22) in a height direction of the battery module (2);
further comprising: the reinforcing plate (5), one end of the reinforcing plate (5) is connected with the outer side wall of the reinforcing beam (3), the other end of the reinforcing plate (5) is connected with the lower shell (1), the reinforcing plate (5), the lower shell (1) and the reinforcing beam (3) jointly enclose a triangular cavity, the module end plate (22) is provided with a recessed space (23), the reinforcing beam (3) extends upwards and at least partially extends into the recessed space (23), the reinforcing plate (5) is provided with a plurality of first lightening holes (51), the first lightening holes (51) penetrate through the reinforcing plate (5), and the first lightening holes (51) are arranged and spaced in the length direction of the reinforcing plate (5).
2. The battery pack for a vehicle according to claim 1, wherein the module end plate (22) includes: a lower plate portion (24) and an upper plate portion (25) provided on the lower plate portion (24), the upper plate portion (25) protruding the lower plate portion (24) in a direction away from the battery module (2), so that the recessed space (23) is formed between a lower side of the upper plate portion (25) and an outer side surface of the lower plate portion (24).
3. The battery pack for a vehicle according to claim 2, wherein a lower surface of the upper plate portion (25) is supported on an upper surface of the reinforcement beam (3), and the reinforcement beam (3) and the upper plate portion (25) are fastened to each other by a fastener (4) penetrating both.
4. The battery pack for the vehicle according to claim 2, wherein the reinforcement beam (3) protrudes the upper plate portion (25) in a direction away from the battery module (2).
5. The vehicle battery pack according to claim 2, wherein the reinforcement beam (3) extends in the width direction of the battery module (2) to protrude from the same-side face of the module end plate (22).
6. The battery pack for the vehicle according to claim 2, wherein the thickness of the upper plate portion (25) is greater than the thickness of the lower plate portion (24), and an inner side surface of the upper plate portion (25) is flush with an inner side surface of the lower plate portion (24).
7. The vehicle battery pack according to claim 2, wherein a dimension of the upper plate portion (25) in a height direction of the battery module (2) substantially coincides with a dimension of the lower plate portion (24) in the height direction.
8. The battery pack for a vehicle according to claim 1, further comprising: a reinforcing plate (5), wherein one end of the reinforcing plate (5) is connected with the outer side wall of the reinforcing beam (3), the other end of the reinforcing plate (5) is connected with the lower shell (1), the reinforcing plate (5) is provided with a plurality of first lightening holes (51), the plurality of first lightening holes (51) penetrate through the reinforcing plate (5), and the plurality of first lightening holes (51) are arranged and spaced in the length direction of the reinforcing plate (5);
the reinforcing beam (3) is provided with a plurality of second lightening holes (31), the second lightening holes (31) penetrate through the reinforcing beam (3), the second lightening holes (31) are arranged in the length direction of the reinforcing plate (5) and are spaced, and the first lightening holes (51) and the second lightening holes (31) are arranged in a one-to-one correspondence mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811631972.5A CN109728219B (en) | 2018-12-29 | 2018-12-29 | Battery pack for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811631972.5A CN109728219B (en) | 2018-12-29 | 2018-12-29 | Battery pack for vehicle |
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| Publication Number | Publication Date |
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| CN109728219A CN109728219A (en) | 2019-05-07 |
| CN109728219B true CN109728219B (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811631972.5A Active CN109728219B (en) | 2018-12-29 | 2018-12-29 | Battery pack for vehicle |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323385A (en) * | 2019-07-08 | 2019-10-11 | 北京新能源汽车股份有限公司 | Battery modules, battery pack and vehicle |
| CN111301184A (en) * | 2020-03-20 | 2020-06-19 | 重庆长安汽车股份有限公司 | Backplate and electric automobile at bottom of carbon-fibre composite battery |
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| CN109728219A (en) | 2019-05-07 |
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