Power battery frame, power battery and vehicle

Abstract

The utility model relates to a power battery frame which comprises two frame longitudinal beams and two frame cross beams, the two frame longitudinal beams are arranged in parallel left and right at an interval, the two ends of one frame cross beam are connected with the front ends of the two frame longitudinal beams respectively, and the two ends of the other frame cross beam are connected with the rear ends of the two frame longitudinal beams respectively; the frame longitudinal beams and the frame cross beams are hollow beams, reinforcing filling bodies and first heat preservation filling bodies are arranged in the frame longitudinal beams, and second heat preservation filling bodies are arranged in the frame cross beams. The utility model also provides a power battery. The utility model further provides a vehicle. The heat preservation performance and the collision performance of the power battery can be improved, and the power battery has the characteristics of reasonable structural arrangement and high integration level.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, concretely relates to a kind of power battery frame, power battery and vehicle. BACKGROUND

[0002] Power battery is the key component of new energy vehicle, and the existing power battery usually faces the following technical problems:

[0003] In low temperature environment, the internal chemical reaction rate of power battery will drop, and the discharge capacity of power battery will drop accordingly. Usually, battery heating system is used to heat power battery to maintain the temperature of power battery. The battery heating system needs to consume the energy of power battery, which will adversely affect the endurance mileage of power battery. Some technologies use the method of adding thermal insulation cotton outside the power battery frame to improve the thermal insulation performance of power battery. However, directly adding thermal insulation cotton outside the power battery frame will increase the envelope size of power battery, reduce the integration efficiency of power battery, and the thermal insulation cotton will be damaged, broken, and absorb water during the driving of the vehicle.

[0004] When power battery is subjected to collision, it may catch fire, which poses a safety hazard. Usually, reinforcing members are added outside the power battery to strengthen the protection of power battery. Directly adding reinforcing members outside the power battery will increase the envelope size of power battery and reduce the integration efficiency of power battery. SUMMARY

[0005] The utility model aims to provide a kind of power battery frame, power battery and vehicle to alleviate or eliminate at least one of the above technical problems.

[0006] The utility model discloses a kind of power battery frame, including two frame longitudinal beams and two frame cross beams, two described frame longitudinal beams are arranged in parallel with interval left and right, the front end of two described frame longitudinal beams is respectively connected with the two ends of one described frame cross beam, the rear end of two described frame longitudinal beams is respectively connected with the two ends of another described frame cross beam;Described frame longitudinal beam and described frame cross beam are hollow beam respectively, first thermal insulation filling body and reinforcing filling body are arranged in the frame longitudinal beam, second thermal insulation filling body is arranged in the frame cross beam.

[0007] Optionally, the first cavity and the second cavity are arranged in the frame longitudinal beam, the first thermal insulation filling body is filled in the first cavity, and the reinforcing filling body is filled in the second cavity.

[0008] Optionally, the frame longitudinal beam includes a hollow longitudinal beam body and a first rib connected in the longitudinal beam body, the first rib extends along the length direction of the frame longitudinal beam, and the first rib divides the inner cavity of the longitudinal beam body into the first cavity and the second cavity.

[0009] Optionally, the first rib is connected between the upper side wall and the lower side wall of the beam body.

[0010] Optionally, the frame cross beam is internally provided with a third cavity and a fourth cavity, and the second thermal insulation filling body is filled in the third cavity.

[0011] Optionally, the frame cross beam comprises a hollow cross beam body and a second rib connected in the cross beam body, the second rib extends along the length direction of the frame cross beam, and the second rib divides the inner cavity of the cross beam body into the third cavity and the fourth cavity.

[0012] Optionally, the second rib is connected between the upper side wall and the lower side wall of the cross beam body.

[0013] Optionally, the first thermal insulation filling body is a quartz wool filling body or an aramid honeycomb filling body or an aerogel filling body, and / or the second thermal insulation filling body is a quartz wool filling body or an aramid honeycomb filling body or an aerogel filling body, and / or the reinforcing filling body is a honeycomb aluminum filling body or a foamed aluminum filling body.

[0014] The utility model also proposes a kind of power battery, including electric core module, upper heat insulation layer, lower buffer heat insulation layer, the power battery frame as any one described above, upper cover connected in the upper side of the power battery frame and bottom guard plate connected in the lower side of the power battery frame, the upper cover, the battery frame and the bottom guard plate enclose electric core accommodating space, the electric core module is arranged in the electric core accommodating space, the upper heat insulation layer is between the electric core module and the upper cover, the lower buffer heat insulation layer is between the bottom guard plate and the electric core module.

[0015] The utility model also proposes a kind of vehicle, including the power battery frame as any one described above.

[0016] The utility model can improve the thermal insulation performance and crash performance of power battery, with the characteristics of reasonable structure and high integration level. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structural schematic view of power battery described in part embodiment;

[0018] Figure 2 It is the cross-sectional view of frame longitudinal beam, first thermal insulation filling body and reinforcing filling body described in part embodiment;

[0019] Figure 3 It is the cross-sectional view of frame longitudinal beam described in part embodiment;

[0020] Figure 4 It is the structural schematic view of honeycomb aluminum filling body described in part embodiment;

[0021] Figure 5 A cross-sectional view of the frame cross beam and the second thermal insulation filler for the partial embodiment;

[0022] Figure 6 A cross-sectional view of the frame cross beam for the partial embodiment.

[0023] In the figure, 1 - power battery frame, 2 - upper cover, 3 - upper thermal insulation layer, 4 - water cooling plate, 5 - lower buffer thermal insulation layer, 6 - bottom guard plate, 7 - battery cell module,

[0024] 11 - frame longitudinal beam, 12 - frame cross beam, 13 - first thermal insulation filler, 14 - reinforcing filler, 15 - second thermal insulation filler,

[0025] 111 - longitudinal beam body, 112 - first rib, 113 - first cavity, 114 - second cavity, 121 - cross beam body, 122 - second rib, 123 - third cavity, 124 - fourth cavity. DETAILED DESCRIPTION

[0026] The other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present application. The present application can also be implemented or applied in other different specific embodiments, and each detail in the present application can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, and are not intended to limit the protection scope of the present application.

[0027] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and only show the components related to the present application in the drawings, but are not drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be randomly changed, and the layout pattern of the components can be more complex.

[0028] As Figure 1 , Figure 2 and Figure 5A power battery frame 1 shown in the figure comprises two frame longitudinal beams 11 and two frame transverse beams 12. The two frame longitudinal beams 11 are arranged in parallel and spaced apart, that is, one frame longitudinal beam 11 is arranged in parallel and spaced apart on the right side of the other frame longitudinal beam 11. The two ends of one frame transverse beam 12 are connected to the front ends of the two frame longitudinal beams 11 respectively, and the two ends of the other frame transverse beam 12 are connected to the rear ends of the two frame longitudinal beams 11 respectively. The frame longitudinal beam 11 and the frame transverse beam 12 are hollow beams. The frame longitudinal beam 11 is provided with a reinforcing filler 14 and a first heat-insulating filler 13, and the frame transverse beam 12 is provided with a second heat-insulating filler 15.

[0029] By filling the first heat-insulating filler 13 in the frame longitudinal beam 11 and filling the second heat-insulating filler 15 in the frame transverse beam 12, the heat-insulating performance of the power battery frame 1 can be improved, and heat loss from the side of the power battery can be prevented. By filling the reinforcing filler 14 in the frame longitudinal beam 11, the crash performance of the power battery frame 1 can be improved, and the risk of the power battery frame 1 invading the battery cell to cause electrolyte leakage or even fire during vehicle collision can be reduced. By arranging the fillers in the inner cavities of the frame longitudinal beam 11 and the frame transverse beam 12 to improve the heat-insulating performance and the crash performance, the inner cavities of the frame longitudinal beam 11 and the frame transverse beam 12 are reasonably utilized, the outer envelope size of the power battery is not increased, and the spatial integration efficiency of the power battery is improved.

[0030] In the above technical solution, the reinforcing filler is arranged in the frame longitudinal beam 11, and the reinforcing filler is not usually arranged in the frame transverse beam 12. Since the power battery is usually arranged in the middle of the vehicle, the front bumper energy absorption structure is arranged on the front side of the power battery, and the trunk energy absorption structure is arranged on the rear side of the power battery. In the case that the reinforcing filler is not arranged in the frame transverse beam 12, the front bumper energy absorption structure and the trunk energy absorption structure can also ensure the protection of the power battery. Therefore, the reinforcing filler can be arranged only in the frame longitudinal beam 11, and the reinforcing filler is not usually arranged in the frame transverse beam 12, which has the characteristic of high integration level.

[0031] In some embodiments, as shown in Figure 2 and Figure 3 , the frame longitudinal beam 11 is provided with a first cavity 113 and a second cavity 114. The first heat-insulating filler 13 is filled in the first cavity 113, and the reinforcing filler 14 is filled in the second cavity 114. By filling the first heat-insulating filler 13 and the reinforcing filler 14 in different cavities respectively, the above technical solution has the characteristic of easy implementation. Moreover, forming different cavities in the frame longitudinal beam 11 helps to improve the strength and rigidity of the frame longitudinal beam 11.

[0032] In some embodiments, as shown in Figure 3As shown, the frame longitudinal beam 11 comprises a hollow longitudinal beam body 111 and a first rib 112 connected in the longitudinal beam body 111, the first rib 112 extends along the length direction of the frame longitudinal beam 11, and the first rib 112 divides the inner cavity of the longitudinal beam body 111 into a first cavity 113 and a second cavity 114. By dividing the first cavity 113 and the second cavity 114 in the frame longitudinal beam 11 by the first rib 112, it has the characteristics of easy implementation.

[0033] In some embodiments, as shown in Figure 3 As shown, the first rib 112 is connected between the upper side wall and the lower side wall of the longitudinal beam body 111. With the technical solution described above, the first thermal insulation filling body 13 has a large coverage area on the side of the power battery, and the first thermal insulation filling body 13 can play a better thermal insulation role and can better prevent heat from dissipating from the left and right sides of the power battery.

[0034] In some embodiments, as shown in Figure 5 and Figure 6 As shown, the frame transverse beam 12 is provided with a third cavity 123 and a fourth cavity 124, and the second thermal insulation filling body 15 is filled in the third cavity 123. With the technical solution described above, different cavities are formed in the frame transverse beam 12, which helps to improve the strength and rigidity of the frame transverse beam 12.

[0035] In some embodiments, as shown in Figure 6 As shown, the frame transverse beam 12 comprises a hollow transverse beam body 121 and a second rib 122 connected in the transverse beam body 121, the second rib 122 extends along the length direction of the frame transverse beam 12, and the second rib 122 divides the inner cavity of the transverse beam body 121 into a third cavity 123 and a fourth cavity 124. By dividing the third cavity 123 and the fourth cavity 124 in the frame transverse beam 12 by the second rib 122, it has the characteristics of easy implementation.

[0036] In some embodiments, as shown in Figure 6 As shown, the second rib 122 is connected between the upper side wall and the lower side wall of the transverse beam body 121. With the technical solution described above, the second thermal insulation filling body 15 has a large coverage area on the side of the power battery, and the second thermal insulation filling body 15 can play a better thermal insulation role and can better prevent heat from dissipating from the front and back of the power battery.

[0037] As a preferred example, the first thermal insulation filling body 13 is a quartz wool filling body or an aramid honeycomb filling body or an aerogel filling body, and the first thermal insulation filling body 13 can be connected with the frame longitudinal beam 11 in a bonding manner, for example, bonded with the frame longitudinal beam 11 by using structural adhesive. Obviously, the first thermal insulation filling body 13 can also be made of other thermal insulation materials.

[0038] As a preferred example, the second thermal insulation filler 15 is a quartz wool filler or an aramid honeycomb filler or an aerogel filler, and the second thermal insulation filler 15 can be connected to the frame cross beam 12 by adhesion, for example, by adhesion to the frame cross beam 12 by structural adhesive. Obviously, the second thermal insulation filler 15 can also be made of other thermal insulation materials.

[0039] As a preferred example, the reinforcing filler 14 is a honeycomb aluminum filler or a foamed aluminum filler, and compared with the scheme of increasing the thickness of the frame longitudinal beam 11 to improve the structural strength, the scheme of using the reinforcing filler 14 to reinforce has the characteristics of remarkable effect and light weight, which is beneficial to the lightweight design of the power battery. In specific implementation, the reinforcing filler 14 can be connected to the frame longitudinal beam 11 by adhesion, for example, by adhesion to the frame longitudinal beam 11 by structural adhesive. Obviously, the reinforcing filler 14 can also be made of other reinforcing materials.

[0040] As a specific example, as shown in Figure 4 The honeycomb aluminum filler can be made of hexagonal energy-absorbing honeycomb aluminum material, and the porosity of the honeycomb aluminum filler can be adjusted according to the simulation results of the extrusion and collision of the power battery to realize lean design.

[0041] The first thermal insulation filler 13, the second thermal insulation filler 15 and the reinforcing filler 14 described above are all made of porous medium materials, which can effectively absorb the noise inside the battery and reduce electromagnetic interference.

[0042] In specific implementation, the power battery frame 1 is usually made of metal, for example, made of aluminum alloy, and the processing technology can be selected as extrusion or bending and welding. The thickness of the thermal insulation filler and the reinforcing filler 14 can be determined according to the simulation results, for example, the thickness is determined as 8mm to 20mm. The frame longitudinal beam 11 and the frame cross beam 12 can be fixedly connected by CMT or gas shielded welding.

[0043] The utility model also proposes a kind of power battery, including cell module 7, upper heat insulation layer 3, lower buffer heat insulation layer 5, water cooling plate 4, as any one described above the power battery frame 1, upper cover 2 connected on the upper side of power battery frame 1 and bottom guard plate 6 connected in the lower side of power battery frame 1, upper cover 2, battery frame and bottom guard plate 6 enclose cell accommodating space, cell module 7 is arranged in cell accommodating space, water cooling plate 4 is located in the lower side of cell module 7, upper heat insulation layer 3 is located between cell module 7 and upper cover 2, lower buffer heat insulation layer 5 is located between bottom guard plate 6 and water cooling plate 4.

[0044] By the above technical scheme, the upper heat insulation layer 3 can prevent heat from dissipating from the upper side of the power battery, the lower buffer heat insulation layer 5 can prevent heat from dissipating from the lower side of the power battery, and the lower buffer heat insulation layer 5 can also reduce the deformation degree of the water-cooled plate 4 when the power battery bottom is scraped, thereby ensuring normal use of the power battery.

[0045] In a specific implementation, the upper heat insulation layer 3 can be heat insulation foam paste on the upper cover 2, and the lower buffer heat insulation layer 5 can be buffer heat insulation foam paste on the bottom guard plate 6.

[0046] The upper cover 2 can be fixedly connected with the power battery frame 1 through bolts, the water-cooled plate 4 can be fixedly connected with the power battery frame 1 through friction stir welding, and the bottom guard plate 6 can be connected with the water-cooled plate 4 through bolts or adhesives. The bottom guard plate 6 is indirectly fixedly connected with the battery frame through the water-cooled plate 4. In a specific implementation, the connection modes between the components of the power battery include, but are not limited to, welding, riveting and gluing.

[0047] The utility model also proposes a vehicle, including the power battery frame 1 of any one of the above.

[0048] The above embodiments are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. Equivalent replacement or transformation of the utility model made by the person skilled in the art on the basis of the utility model is within the protection scope of the utility model. In the description of the specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics combined with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine different embodiments or examples described in the specification.

[0049] In the description of the utility model, it is understood that the terms "upper", "lower", "left", "right", "front", "rear" and the like indicate the orientation based on the coordinate system in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. Figure 1 In the description of the utility model, it is understood that the terms "upper", "lower", "left", "right", "front", "rear" and the like indicate the orientation based on the coordinate system in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

Claims

1. A power cell frame, characterized by, The frame includes two frame longitudinal beams (11) and two frame transverse beams (12), the two frame longitudinal beams (11) are arranged side by side and spaced apart, the two ends of one of the frame transverse beams (12) are connected with the front ends of the two frame longitudinal beams (11) respectively, and the two ends of the other frame transverse beam (12) are connected with the rear ends of the two frame longitudinal beams (11) respectively; the frame longitudinal beam (11) and the frame transverse beam (12) are hollow beams, the frame longitudinal beam (11) is provided with a reinforcing filler (14) and a first heat-insulating filler (13) inside, and the frame transverse beam (12) is provided with a second heat-insulating filler (15) inside.

2. The power cell frame of claim 1, wherein, The frame longitudinal beam (11) is provided with a first cavity (113) and a second cavity (114) inside, the first heat-insulating filler (13) is filled in the first cavity (113), and the reinforcing filler (14) is filled in the second cavity (114).

3. The power cell frame of claim 2, wherein, The frame longitudinal beam (11) includes a hollow longitudinal beam body (111) and a first rib (112) connected in the longitudinal beam body (111), the first rib (112) extends along the length direction of the frame longitudinal beam (11), and the first rib (112) divides the inner cavity of the longitudinal beam body (111) into the first cavity (113) and the second cavity (114).

4. The power cell frame of claim 3, wherein, The first rib (112) is connected between the upper side wall and the lower side wall of the longitudinal beam body (111).

5. The power cell frame of claim 1, wherein, The frame transverse beam (12) is provided with a third cavity (123) and a fourth cavity (124) inside, and the second heat-insulating filler (15) is filled in the third cavity (123).

6. The power cell frame of claim 5, wherein, The frame transverse beam (12) includes a hollow transverse beam body (121) and a second rib (122) connected in the transverse beam body (121), the second rib (122) extends along the length direction of the frame transverse beam (12), and the second rib (122) divides the inner cavity of the transverse beam body (121) into the third cavity (123) and the fourth cavity (124).

7. The power cell frame of claim 6, wherein, The second rib (122) is connected between the upper side wall and the lower side wall of the transverse beam body (121).

8. The power cell frame of claim 1, wherein, The first heat-insulating filler (13) is a quartz wool filler or an aramid honeycomb filler or an aerogel filler, and / or the second heat-insulating filler (15) is a quartz wool filler or an aramid honeycomb filler or an aerogel filler, and / or the reinforcing filler (14) is a honeycomb aluminum filler or a foamed aluminum filler.

9. A power cell, characterized by The power battery frame comprises an upper heat insulation layer (3), a lower buffer heat insulation layer (5), and a power battery frame as claimed in any one of claims 1-8, an upper cover (2) connected to the upper side of the power battery frame, and a bottom guard plate (6) connected to the lower side of the power battery frame, the upper cover (2), the battery frame, and the bottom guard plate (6) form a cell accommodating space, the cell module (7) is arranged in the cell accommodating space, the upper heat insulation layer (3) is located between the cell module (7) and the upper cover (2), and the lower buffer heat insulation layer (5) is located between the bottom guard plate (6) and the cell module (7).

10. A vehicle characterized by comprising: The power battery frame comprises a power battery frame as claimed in any one of claims 1-8.

Images