A power battery shell and a preparation method thereof

Abstract

The application discloses a power battery shell applied to a power battery of an automobile and relates to the field of power battery shells.The power battery shell comprises a lower supporting basin, a bottom reinforcing beam, a supporting basin support and an upper cover plate, the lower supporting basin comprises a lower bottom plate and a lower side plate, the lower side plate is arranged around the lower bottom plate, the lower bottom plate and the lower side plate form a containing cavity for containing the power battery, the bottom reinforcing beam is arranged outside the lower bottom plate, the supporting basin support is arranged on the bottom reinforcing beam, the supporting basin support is used for fixing the power battery shell to a vehicle body, the upper cover plate is fixed with the lower supporting basin, and the upper cover plate is used for closing the containing cavity.The power battery shell and the preparation method thereof are provided, the lateral pressure resistance is effectively improved, and the use safety of the power battery is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power batteries, in particular to a power battery shell and a preparation method thereof. BACKGROUND

[0002] The power battery pack is one of the core components of a new energy vehicle and is a power source for driving the vehicle, and usually includes a plurality of battery monomers in series and parallel connection, a management control module, a cooling system and the like inside, and is wrapped by a battery shell outside. The power battery shell plays a role of installation, sealing and protection of the internal battery cell module, and needs to have high crashworthiness and anti-extrusion performance to prevent the internal battery cell from being damaged and causing fire or explosion when the vehicle collides, is extruded or the bottom is scratched. According to GB 38031-2020 Safety Requirements for Power Storage Batteries for Electric Vehicles, the existing structure has poor simulation collision and anti-extrusion performance when the performance of the power battery pack is tested alone, especially in the extrusion working condition, the contact risk of the lower side edge with the module is extremely high, and if the contact occurs, the internal battery cell module will be extruded, which has a great safety hazard. SUMMARY

[0003] The present application relates to the field of power batteries, in particular to a power battery shell and a preparation method thereof.

[0004] To solve the above technical problems, the present application adopts the following technical scheme:

[0005] A power battery shell applied to a vehicle, comprising:

[0006] A lower supporting basin comprising a lower bottom plate and a lower side plate, the lower side plate being arranged around the lower bottom plate, and the lower bottom plate and the lower side plate forming a containing cavity for containing a power battery;

[0007] A bottom reinforcing beam arranged outside the lower bottom plate;

[0008] A supporting basin support arranged on the bottom reinforcing beam and used for fixing the power battery shell to a vehicle body;

[0009] An upper cover plate fixed to the lower supporting basin and used for closing the containing cavity.

[0010] In an optional embodiment of the present application, the inner side of the lower bottom plate is provided with a bottom plate support beam.

[0011] In an optional embodiment of the present application, the upper cover plate, the supporting basin support, the bottom plate support beam, the bottom reinforcing beam and the lower supporting basin are integrally stamped from a steel material.

[0012] In an alternative embodiment of the present application, the lower bottom plate is provided with a plurality of grooves, and a plurality of convex ribs are formed between the grooves, and the grooves are arranged along the side edges of the lower bottom plate.

[0013] In an alternative embodiment of the present application, the bottom reinforcing beam comprises at least two bottom reinforcing cross beams and at least two bottom reinforcing longitudinal beams, the bottom reinforcing cross beams and the bottom reinforcing longitudinal beams are provided with recesses at the corresponding positions of the grooves of the lower bottom plate, the bottom reinforcing cross beams and the bottom reinforcing longitudinal beams are completely attached to the lower bottom plate, the bottom reinforcing cross beams and the bottom reinforcing longitudinal beams are respectively parallel to the intersecting side edges of the lower bottom plate, and the bottom reinforcing cross beams and the bottom reinforcing longitudinal beams are connected end to end.

[0014] In an alternative embodiment of the present application, the bottom plate support beam comprises a plurality of bottom plate support cross beams and a plurality of bottom plate support longitudinal beams, the bottom plate support cross beams and the bottom plate support longitudinal beams are provided with convex molds at the corresponding positions of the grooves of the lower bottom plate, the bottom plate support cross beams and the bottom plate support longitudinal beams are completely attached to the lower bottom plate, the bottom plate support cross beams and the bottom plate support longitudinal beams are respectively parallel to the intersecting side edges of the lower bottom plate, and the bottom plate support longitudinal beams are provided with recessed interfaces corresponding to the number of the bottom plate support cross beams, the bottom plate support cross beams intersect at the recessed interfaces of the bottom plate support longitudinal beams, and the bottom plate support cross beams are arranged in the recessed interfaces of the bottom plate support longitudinal beams.

[0015] In an alternative embodiment of the present application, the pot support bracket comprises a first fixing part, a connecting part and a second fixing part connected in sequence, the first fixing part and the second fixing part are at right angles, the first fixing part is fixed to the bottom reinforcing beam, and the second fixing part is used for fixing the vehicle body.

[0016] In an alternative embodiment of the present application, the lower side plate is provided with an outwardly extending lower outer edge, the upper cover plate is provided with an outwardly extending upper outer edge around, the upper outer edge of the upper cover plate and the lower outer edge of the lower pot are fixed, and a sealing gasket is arranged between the upper outer edge and the lower outer edge.

[0017] A power battery shell preparation method is applied to the power battery shell, and comprises the following steps:

[0018] The size of the power battery module is obtained, and the lower pot for accommodating the power battery module is punched according to the size of the battery module;

[0019] The bottom reinforcing beam is punched, and the bottom reinforcing beam is welded to the outer bottom of the lower pot;

[0020] The reserved mounting size of the vehicle body is obtained, the pot support bracket for connecting the bottom reinforcing beam and the vehicle body is punched according to the size of the bottom reinforcing beam, one end of the pot support bracket is welded to the bottom reinforcing beam, and the other end of the pot support bracket is fixed to the vehicle body;

[0021] The upper cover plate is punched according to the size of the lower pot, and the upper cover plate is fixed to the lower pot.

[0022] In the alternative embodiment of the present application, the bottom plate support beam is welded to the inner bottom of the lower supporting basin according to the size of the lower supporting basin.

[0023] The power battery shell and the preparation method thereof have the following beneficial effects: the lower supporting basin and the upper cover plate are combined to form a closed accommodating cavity for placing the power battery module, thereby protecting the power battery module. The lower supporting basin is composed of a lower bottom plate and a lower side plate arranged around the lower bottom plate, and has a certain lateral pressure resistance. The lateral pressure resistance of the lower bottom plate is further enhanced by the bottom reinforcing beam, so that the overall lateral pressure resistance is enhanced. The supporting basin bracket changes the lateral pressure resistance direction of the power battery shell. The lower supporting basin is directly fixed to the vehicle body, and the supporting basin bracket is used to connect the vehicle body and the lower supporting basin. The vehicle body is firmly extended as the lateral surface of the power battery shell, so that the external lateral force cannot directly act on the power battery shell. The vehicle body with high structural strength is used as the first bearing structure of the lateral pressure, and the supporting basin bracket is used as the buffer. The bottom reinforcing beam bears the lateral pressure, and finally the lateral pressure is applied to the lower supporting basin. The lateral force received by the power battery shell is effectively reduced, the lateral pressure resistance of the power battery shell is improved, the protection capability of the power battery module is enhanced, and the use safety of the power battery module is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 It is a structural schematic diagram of the power battery shell of the present application;

[0026] Figure 2 It is an exploded view of the power battery shell of the present application;

[0027] Figure 3 It is a structural schematic diagram of the lower supporting basin of the power battery shell of the present application;

[0028] Figure 4 It is a structural schematic diagram of the bottom reinforcing beam of the power battery shell of the present application;

[0029] Figure 5 It is a structural schematic diagram of the bottom seat support beam of the power battery shell of the present application;

[0030] Figure 6 It is a structural schematic diagram of the bottom seat support beam of the power battery shell of the present application;

[0031] Figure 7 It is a structure schematic view of a supporting bracket of a power battery shell according to the present application;

[0032] Figure 8 It is a structure schematic view of an upper cover plate of a power battery shell according to the present application;

[0033] Figure 9 It is a flow chart of a preparation method of a power battery shell according to the present application.

[0034] The figure reference: 100, power battery shell; 10, lower supporting basin; 11, lower bottom plate; 111, groove; 112, convex rib; 12, lower side plate; 13, lower outer edge; 20, bottom reinforcing beam; 21, bottom reinforcing cross beam; 211, concave die; 22, bottom reinforcing longitudinal beam; 30, supporting basin bracket; 31, first fixing part; 32, connecting part; 33, second fixing part; 34, supporting side plate; 40, upper cover plate; 41, upper bottom plate; 411, waist-shaped slot; 42, upper side plate; 43, upper outer edge; 50, bottom plate supporting beam; 51, bottom plate supporting cross beam; 52, bottom plate supporting longitudinal beam; 521, convex die; 522, concave interface; 523, connecting sheet. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features.

[0038] In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0039] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "communication", "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these example implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art. The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings are not necessarily to scale, the same reference numerals in the drawings refer to the same or similar portions, and thus repeated description thereof will be omitted.

[0041] The following description of the application will be made with reference to the accompanying drawings. Figures 1-9 The preferred embodiments of the present application are further elaborated.

[0042] Please refer to Figure 1 and Figure 2 The power battery shell 100 provided by the embodiments of the present application can be applied to fixing the power battery module to the vehicle body. The lower tray 10 of the power battery shell 100 enhances the overall lateral pressure resistance by the bottom reinforcing beam 20, and the overall fixing mode of the upper cover plate 40, and the vehicle body and the bottom reinforcing beam 20 are connected through the tray support 30, so that the vehicle body becomes the extension structure of the power battery shell 100, that is, the lateral pressure is first unloaded through the vehicle body, thereby enhancing the overall lateral pressure resistance of the power battery shell 100 and improving the use safety of the power battery module.

[0043] In the embodiments of the present application, please refer to Figure 1 and Figure 2 A power battery shell 100 applied to a vehicle, comprising a lower tray 10, a bottom reinforcing beam 20, a tray support 30 and an upper cover plate 40.

[0044] The lower tray 10 comprises a lower bottom plate 11 and a lower side plate 12, the lower side plate 12 is arranged around the lower bottom plate 11, and the lower bottom plate 11 and the lower side plate 12 form a containing cavity for accommodating the power battery, which plays a protective role for the power battery module;

[0045] The bottom reinforcing beam 20 is arranged outside the lower bottom plate 11 and plays a role in enhancing the compression resistance of the lower bottom plate 11.

[0046] The supporting bracket 30 is arranged on the bottom reinforcing beam 20, and is used for fixing the power battery shell 100 to the vehicle body. The existing fixing mode of the power battery shell 100 is changed, and the vehicle body and the bottom reinforcing beam 20 are fixed through the supporting bracket 30. The supporting bracket 30 plays a role of an intermediate bridge, and can also play a role of a buffer force, thereby enhancing the compression resistance of the power battery shell 100 as a whole.

[0047] The upper cover plate 40 is fixed to the lower supporting basin 10, and is used for closing the accommodating cavity, so that the power battery module is in a sealed state when placed in the accommodating cavity, and the protection capability of the power battery module is effectively improved. Meanwhile, the upper cover plate 40 plays a role of enhancing the compression resistance of the lower supporting basin 10.

[0048] The inner side of the lower bottom plate 11 is provided with the bottom plate supporting beam 50, and the outer side of the lower bottom plate 11 is provided with the bottom reinforcing beam 20. The bottom reinforcing beam 20 and the bottom plate supporting beam 50 simultaneously play a role of enhancing the compression resistance of the lower bottom plate 11 through the bottom plate supporting beam 50 on the inner side of the lower bottom plate 11. Meanwhile, the bottom reinforcing beam 20 and the bottom plate supporting beam 50 can play a complementary role, and further enhance the compression resistance of the lower bottom plate 11.

[0049] The upper cover plate 40, the supporting bracket 30, the bottom plate supporting beam 50, the bottom reinforcing beam 20 and the lower supporting basin 10 are integrally stamped from steel material. The steel material has high overall strength, is wear-resistant and corrosion-resistant. The integrally stamped structure enhances the compression resistance of each structure. Meanwhile, the stamped structure can be thinner under the condition of meeting the strength requirement, so that the overall structure is lighter, and the material is less.

[0050] Please refer to Figure 3 The lower bottom plate 11 is provided with a plurality of grooves 111, a plurality of convex ribs 112 are formed between the grooves 111, and the grooves 111 are arranged along the side edges of the lower bottom plate 11. The grooves 111 arranged along the side edges of the lower bottom plate 11 make the convex ribs 112 parallel to the side edges of the lower bottom plate 11. The compression resistance enhancement direction of the grooves 111 corresponds to the side plates of the lower bottom plate 11. The grooves 111 arranged on the lower bottom plate 11 make the lower bottom plate 11 form the convex ribs 112. Under the condition that the horizontal projection area is constant, the compression resistance of the lower bottom plate 11 is enhanced, and the weight of the structure of the lower bottom plate 11 is not affected.

[0051] Please refer to Figure 4The bottom reinforcement beam 20 includes at least two bottom reinforcement cross beams 21 and at least two bottom reinforcement longitudinal beams 22. The bottom reinforcement cross beam 21 and the bottom reinforcement longitudinal beam 22 are provided with a die 211 at the corresponding position of the groove 111 of the lower bottom plate 11. The bottom reinforcement cross beam 21 and the bottom reinforcement longitudinal beam 22 are completely fitted with the lower bottom plate 11. The bottom reinforcement cross beam 21 and the bottom reinforcement longitudinal beam 22 are respectively parallel to the intersecting sides of the lower bottom plate 11, and the bottom reinforcement cross beam 21 and the bottom reinforcement longitudinal beam 22 are connected end to end.

[0052] The bottom reinforcing crossbeam 21 and the bottom reinforcing longitudinal beam 22 form a Chinese-horizontal shape on the outside of the lower base plate 11, which can effectively enhance the lower base plate 11's ability to resist lateral pressure. The Chinese-horizontal shape formed by the bottom reinforcing crossbeam 21 and the bottom reinforcing longitudinal beam 22 connected end to end forms a tail support between the bottom reinforcing crossbeam 21 and the bottom reinforcing longitudinal beam 22, further enhancing the supporting effect of the bottom reinforcing crossbeam 21 and the bottom reinforcing longitudinal beam 22 on the lower base plate 11. The bottom reinforcing crossbeam 21 and the bottom reinforcing longitudinal beam 22 are provided with a die 211 at a position corresponding to the groove 111 of the lower base plate 11. The bottom reinforcing crossbeam 21 and the bottom reinforcing longitudinal beam 22 are completely fitted with the lower base plate 11, and the groove 111 and the die 211 are fitted together. A stable double-support structure is formed between the lower base plate 11 and the bottom reinforcing crossbeam 21 and the bottom reinforcing longitudinal beam 22, greatly enhancing the lower base plate 11's ability to resist extrusion.

[0053] Half of the bottom reinforcing crossbeam 21 and bottom reinforcing longitudinal beam 22 fits in the groove 111 of the lower base plate 11, while the other half fits in the rib 112 formed on the lower base plate 11. The bottom reinforcing crossbeam 21 and bottom reinforcing longitudinal beam 22 fit in both the groove 111 and the rib 112 of the lower base plate 11 along their length. These crossbeams 21 and bottom reinforcing longitudinal beam 22 effectively enhance the groove 111 and rib 112 of the lower base plate 11 against lateral pressure. Furthermore, the lower base plate 11 provides sufficient support for the crossbeam 21 and longitudinal beam 22, ensuring strong bottom support for the basin bracket 30 mounted on the crossbeam 21 and longitudinal beam 22.

[0054] Please refer to Figure 5 and Figure 6The bottom plate support beam 50 includes several bottom plate support cross beams 51 and several bottom plate support longitudinal beams 52. The bottom plate support cross beams 51 and the bottom plate support longitudinal beams 52 are provided with convex molds 521 at positions corresponding to the grooves 111 of the lower bottom plate 11. The bottom plate support cross beams 51 and the bottom plate support longitudinal beams 52 are completely fitted with the lower bottom plate 11. The bottom plate support cross beams 51 and the bottom plate support longitudinal beams 52 are respectively parallel to the intersecting sides of the lower bottom plate 11, and the bottom plate support longitudinal beams 52 are provided with concave interfaces 522 corresponding to the number of the bottom plate support cross beams 51. The bottom plate support cross beams 51 intersect with the concave interfaces 522 of the bottom plate support longitudinal beams 52, and the bottom plate support cross beams 51 are placed in the concave interfaces 522 of the bottom plate support longitudinal beams 52.

[0055] The floor support crossbeams 51 and floor support longitudinal beams 52 are parallel to the intersecting sides of the lower floor 11, forming a crisscross pattern between them. The floor support crossbeams 51 and floor support longitudinal beams 52 support each other. The floor support longitudinal beams 52 are provided with a corresponding number of recessed joints 522 as the floor support crossbeams 51. The floor support crossbeams 51 intersect with the recessed joints 522 of the floor support longitudinal beams 52, and the floor support crossbeams 51 are positioned within the recessed joints 522 of the floor support longitudinal beams 52. This ensures that both the floor support crossbeams 51 and the floor support longitudinal beams 52 fit closely to the lower floor 11, effectively ensuring the consistency of the floor support crossbeams 51 and the floor support longitudinal beams 52, and improving the collision and extrusion load-bearing characteristics. There is a height difference between the bottom plate support cross beam 51 and the bottom plate support longitudinal beam 52, which can be used to arrange the water cooling plate of the power battery module. The arrangement direction of the water cooling plate is just consistent with the height of the bottom plate support longitudinal beam 52, achieving a good heat dissipation effect.

[0056] The bottom plate supporting cross beam 51 and the bottom plate supporting longitudinal beam 52 are provided with a punch 521 at the corresponding position of the groove 111 of the lower bottom plate 11. The bottom plate supporting cross beam 51 and the bottom plate supporting longitudinal beam 52 are completely fitted with the lower bottom plate 11. At the same time, the bottom reinforcement beam 20 is fitted to the outer side of the lower bottom plate 11, that is, the bottom plate supporting beam 50 and the bottom reinforcement beam 20 are respectively fitted to the inner and outer sides of the lower bottom plate 11, and then a multi-point and multi-structure support is formed in the direction of lateral pressure through the groove 111 of the lower bottom plate 11, thereby further improving the lateral pressure resistance of the overall structure of the lower support basin 10.

[0057] Connecting pieces 523 are provided at both ends of the bottom plate supporting cross beam 51 and the bottom plate supporting longitudinal beam 52. The connecting pieces 523 are welded to the inner side of the lower side plate 12 to enhance the connection strength between the bottom plate supporting cross beam 51 and the bottom plate supporting longitudinal beam 52 and the lower support basin 10, thereby improving the anti-extrusion ability.

[0058] The cross-sections of the bottom plate support beam 50 and the bottom reinforcement beam 20 are both in the shape of an "X". The bottom plate support beam 50, the bottom reinforcement beam 20 and the lower bottom plate 11 are fixed by welding. The "X"-shaped structure can increase the welding area and enhance the ability to resist lateral pressure.

[0059] Please refer to Figure 7 , the tray support 30 includes a first fixed part 31, a connecting part 32 and a second fixed part 33 connected in turn, the first fixed part 31 and the second fixed part 33 are at right angles, the first fixed part 31 is fixed to the bottom reinforcing beam 20, and the second fixed part 33 is used for fixing the vehicle body. The outer side of the first fixed part 31, the connecting part 32 and the second fixed part 33 is provided with a support side plate 34 connected at the end, that is, the first fixed part 31, the connecting part 32 and the second fixed part 33 are in the shape of a groove 111, so that the tray support 30 has strong bending resistance and plays a buffering role in resisting lateral force on the lower tray 10. The height of the second fixed part 33 is lower than the height of the lower tray 10, so as to prevent the tray support 30 from pressing the upper cover plate 40 during extrusion. The height difference between the first fixed part 31 and the second fixed part 33 is small, and the inclination angle of the connecting part 32 is large, that is, the height difference between the first fixed part 31, the connecting part 32 and the second fixed part 33 in the horizontal direction is small, which can effectively ensure the effectiveness of the force transmission path during lateral extrusion.

[0060] The number of the tray supports 30 is twice the sum of the bottom plate support cross beams 51 and the bottom plate support longitudinal beams 52, and the arrangement position of the tray supports 30 can be placed according to the corresponding positions at both ends of the bottom plate support cross beams 51 and the bottom plate support longitudinal beams 52, or can be placed according to the distance between the corresponding positions at both ends of the bottom plate support cross beams 51 and the bottom plate support longitudinal beams 52. It plays a role in multi-point support in the direction of resisting lateral extrusion.

[0061] Please refer to Figure 3 and Figure 8 , the lower side plate 12 is provided with an outwardly extending lower outer edge 13, the upper cover plate 40 includes an upper bottom plate 41 and an upper side plate 42 arranged around the upper bottom plate 41, the upper side plate 42 is provided with an outwardly extending upper outer edge 43 around the upper side plate 42, the upper outer edge 43 of the upper cover plate 40 and the lower outer edge 13 of the lower tray 10 are fixed, and a sealing gasket is arranged between the upper outer edge 43 and the lower outer edge 13. The upper bottom plate 41 and the upper side plate 42 play a role in expanding the accommodation cavity of the lower tray 10. At the same time, the arrangement of the upper outer edge 43 and the lower outer edge 13 plays a role in fixing structure, the upper outer edge 43 and the lower outer edge 13 are provided with through holes at the corresponding positions, the upper outer edge 43 and the lower outer edge 13 are fixed by the bolts passing through the through holes, and also play a role in enhancing the lateral force resistance. The width of the upper outer edge 43 and the lower outer edge 13 is not less than 30mm. The upper bottom plate 41 is provided with a plurality of waist type grooves 411 along one side edge, which plays a role in enhancing the extrusion resistance.

[0062] Please refer to Figure 9 , a method for preparing a power battery shell 100 is applied to the power battery shell 100, and includes the following steps:

[0063] S10, obtain the size of the power battery module, stamp the lower supporting basin 10 containing the power battery module according to the size of the battery module, and ensure that the size of the lower supporting basin 10 can contain the power battery module.

[0064] S20, stamp the bottom reinforcing beam 20, and weld the bottom reinforcing beam 20 to the outer bottom of the lower supporting basin 10 to enhance the lateral pressure resistance of the lower supporting basin 10.

[0065] S30, stamp the bottom plate supporting beam 50 according to the size of the lower supporting basin 10, and weld the bottom plate supporting beam 50 to the inner bottom of the lower supporting basin 10. The bottom plate supporting beam 50 and the bottom reinforcing beam 20 are respectively arranged on the outer and inner bottoms of the lower supporting basin 10, further enhancing the lateral pressure resistance of the lower supporting basin 10.

[0066] S40, stamp the upper cover plate 40 according to the size of the lower supporting basin 10, and fix the upper cover plate 40 to the lower supporting basin 10. The upper cover plate 40 and the lower supporting basin 10 form a closed space for placing the power battery module, which plays a protective role for the power battery module.

[0067] S50, obtain the reserved installation size of the vehicle body, combine the size of the bottom reinforcing beam 20, stamp the supporting basin bracket 30 for connecting the bottom reinforcing beam and the vehicle body, weld one end of the supporting basin bracket 30 to the bottom reinforcing beam 20, and fix the other end of the supporting basin bracket 30 to the vehicle body. The power battery shell 100 and the vehicle body form a frame structure, and the vehicle body serves as an anti-extrusion structure of the outer edge of the power battery shell 100.

[0068] After S40 and S50 are welded, the upper cover plate 40 and the lower supporting basin 10 are respectively subjected to electrophoretic corrosion treatment to improve the corrosion resistance of each structure.

[0069] The power battery shell 100 cooperates with the left and right rocker beams, seat cross beams, and bottom plate cross beams of the vehicle body to form a frame structure with high strength, which realizes the protection of the power battery module and resists external impact and extrusion.

[0070] In summary, the lower supporting basin 10 and the upper cover plate 40 are combined to form a closed accommodating cavity for placing the power battery module, and the power battery module is protected. The lower supporting basin 10 is composed of a lower bottom plate 11 and a lower side plate 12 arranged around the lower bottom plate 11, and has a certain lateral pressure resistance. The lateral pressure resistance of the lower bottom plate 11 is further enhanced by the bottom reinforcing beam 20, so that the overall lateral pressure resistance is enhanced. The basin support 30 changes the lateral pressure resistance direction of the power battery shell 100 as a whole. The lower supporting basin 10 is directly fixed to the vehicle body at present, and the basin support 30 plays a connecting role between the vehicle body and the lower supporting basin 10. The vehicle body is firmly extended as the lateral surface of the power battery shell 100, and the external lateral surface force cannot directly act on the power battery shell 100. The vehicle body with high structural strength is first used as the first bearing structure of the lateral pressure, and then the basin support 30 plays a buffering role. The bottom reinforcing beam 20 bears the lateral pressure, and finally the lower supporting basin 10 is acted on. The lateral force received by the power battery shell 100 is effectively reduced, the lateral pressure resistance of the power battery shell 100 is improved, the protection capability of the power battery module is enhanced, and the use safety of the power battery module is improved.

[0071] In the description of the above-described embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terms used are illustrative and not restrictive, and the present disclosure is not limited to any of the aforementioned details. Since the present disclosure can be embodied in various forms without departing from the spirit or essential characteristics thereof, it should be understood that the above-described embodiments are not limited to any of the aforementioned details, but are to be interpreted broadly and liberally within the spirit and scope of the appended claims, and all modifications and changes coming within the scope of the claims or their equivalents are intended to be embraced by the claims.

Claims

1. A power battery shell applied to a vehicle, characterized in that, The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell.

2. A power cell housing according to claim 1, wherein, The application relates to a power battery shell.

3. The power cell housing of claim 1, wherein, The application relates to a power battery shell.

4. A power cell housing according to claim 3, wherein, The application relates to a power battery shell.

5. A power cell housing according to any one of claims 1-4, characterized in that The application relates to a power battery shell.

6. A method of manufacturing a power cell housing, characterized by The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. The application relates to a power battery shell. 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The application relates to a The reserved installation size of the vehicle body is obtained, the size of the bottom reinforcing beam is combined, the pot support for connecting the bottom reinforcing beam and the vehicle body is punched, one end of the pot support is welded to the bottom reinforcing beam, and the other end of the pot support is fixed to the vehicle body. The upper cover plate is punched according to the size of the lower pot, and the upper cover plate is fixed to the lower pot.

7. The method of claim 6, wherein the step of forming the housing comprises the steps of: forming a first housing portion; and forming a second housing portion. The bottom plate support beam is punched according to the size of the inner bottom of the lower pot, and the bottom plate support beam is welded to the inner bottom of the lower pot.

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