CN217983567U - Vehicle and its power battery system - Google Patents

Abstract

The utility model provides a vehicle and its power battery system, comprising: a battery inner frame beam assembly, a chassis frame assembly of the vehicle, an upper cover, a lower cover, a cooling plate and a battery module; the chassis frame assembly It has a closed frame forming a closed loop, the upper cover and the lower cover are respectively arranged on the upper side and the lower side of the closed frame, so that between the upper cover and the lower cover, the inside of the closed frame An arrangement space is formed, the battery inner frame beam assembly and the battery module are arranged in the arrangement space, the battery inner frame beam assembly is fixedly connected to the chassis frame assembly, and the battery module is arranged in the The battery inner frame beam assembly, the cooling plate is arranged on the lower side of the closed frame and the battery module, and the upper side of the lower cover.

Description

Vehicle and its power battery system

technical field

The utility model relates to the field of automobiles, in particular to a vehicle and a power battery system thereof.

Background technique

In new energy vehicles, a power battery is usually arranged in the vehicle, and then, the electric energy stored in the power battery is used to provide kinetic energy for the vehicle.

In the existing related technologies, the common power battery structure integration scheme is to use the power battery pack as an independent component and later assemble it on the chassis of the vehicle. The battery pack and the chassis of the vehicle are independent components. This structure requires a large layout space, complex structure, heavy overall weight, and low battery energy density, which is not conducive to the improvement of the cruising range of the vehicle.

Utility model content

The utility model provides a vehicle and its power battery system to solve the problem caused by the independence of the battery and the chassis of the whole vehicle.

According to the first aspect of the present invention, a power battery system for a vehicle is provided, including: a battery inner frame beam assembly, a chassis frame assembly of the vehicle, an upper cover, a lower cover, a cooling plate and a battery module;

The chassis frame assembly has a closed frame forming a closed loop, the upper cover and the lower cover are respectively arranged on the upper side and the lower side of the closed frame, so that between the upper cover and the lower cover, The inner side of the closed frame forms a layout space, the battery inner frame beam assembly and the battery module are arranged in the layout space, the battery inner frame beam assembly is fixedly connected to the chassis frame assembly, the battery The module is arranged on the inner frame beam assembly of the battery, and the cooling plate is arranged on the lower side of the closed frame and the battery module, and the upper side of the lower cover.

Optionally, the closed frame includes a chassis front beam, a chassis rear beam, a left sill beam, a right sill beam, a left front longitudinal beam, a right front longitudinal beam, a left rear longitudinal beam, and a right rear longitudinal beam;

The front end of the left sill beam is connected to the rear end of the left front side beam, the front end of the left front side beam is directly or indirectly connected to the left end of the chassis front cross beam, and the front end of the right door sill beam is connected to the right front side beam. rear end, the front end of the right front longitudinal beam is directly or indirectly connected to the right end of the chassis front cross beam, the rear end of the left sill beam is connected to the front end of the left rear longitudinal beam, and the left rear longitudinal beam is directly or indirectly connected to The left end of the chassis rear crossbeam, the rear end of the right sill beam is connected to the front end of the right rear longitudinal beam, and the right rear longitudinal beam is directly or indirectly connected to the right end of the chassis rear crossbeam;

in:

The heights of the left front longitudinal beam and the right front longitudinal beam are as follows: the height of the front end is higher than the height of the rear end;

The heights of the left rear longitudinal beam and the right rear longitudinal beam are as follows: the height of the rear end is higher than the height of the front end.

Optionally, the closed frame satisfies at least one of the following:

The part of the upper side of the left front side beam close to the front end cross beam of the chassis forms a first height difference with the upper side of the front end cross beam of the chassis, and the part of the upper side of the right front side beam close to the front end cross beam of the chassis and the upper side of the front end cross beam of the chassis The first height difference is formed; a transition sheet metal is provided between the front end cross member of the chassis and the left front longitudinal beam, and between the front end cross member of the chassis and the right front longitudinal beam to realize the first height difference Transition;

The part of the lower side of the left front side beam close to the front end cross beam of the chassis forms a second height difference with the lower side of the front end cross beam of the chassis, and the part of the lower side of the right front side beam close to the front end cross beam of the chassis and the lower side of the front end cross beam of the chassis The second height difference is formed; a transition sheet metal is provided between the front end cross member of the chassis and the left front longitudinal beam, and between the front end cross member of the chassis and the right front longitudinal beam to realize the second height difference Transition;

The part of the upper side of the left rear longitudinal beam close to the rear end cross beam of the chassis forms a third height difference with the upper side of the rear end cross beam of the chassis, and the part of the upper side of the right rear longitudinal beam close to the rear end cross beam of the chassis and the chassis rear end cross beam The upper side of the rear end beam forms the third height difference; transition sheet metal is provided between the chassis rear end beam and the left rear longitudinal beam, and between the chassis rear end beam and the right rear longitudinal beam , for realizing the transition of the third height difference;

The part of the lower side of the left rear longitudinal beam close to the chassis rear end cross beam forms a fourth height difference with the lower side of the chassis rear end cross beam, and the part of the right rear longitudinal beam close to the chassis rear end cross beam and the chassis The lower side of the rear end beam forms the fourth height difference; transition sheet metal is provided between the chassis rear end beam and the left rear longitudinal beam, and between the chassis rear end beam and the right rear longitudinal beam , for realizing the transition of the fourth height difference.

Optionally, the upper cover is provided with a sealing flange surface of the upper cover for sealing the transitional sheet metal;

The lower cover is provided with a sealing flange surface of the lower cover which is used for sealing butt joint with the transitional sheet metal of the lower cover.

Optionally, the battery inner frame beam assembly includes longitudinal beams arranged along a first direction and crossbeams arranged along a second direction, the first direction is perpendicular to the second direction, and the first direction matches the the front-rear direction of the vehicle, the second direction matches the left-right direction of the vehicle;

At least one end of the beam is fixedly connected to the inner side of the closed frame through a corresponding connection assembly, and the two ends of the longitudinal beam are fixedly connected to the beam;

Wherein, the battery modules are distributed between adjacent beams, between adjacent longitudinal beams, and between the longitudinal beams and the closed frame.

Optionally, the longitudinal beams in the battery inner frame beam assembly include first longitudinal beams and second longitudinal beams; the cross beams in the battery inner frame beam assembly include inner frame front end cross beams, inner frame rear end cross beams, Middle beam, left front beam and right front beam;

The two ends of the front beam of the inner frame are respectively fixedly connected to the closed frame through connecting components, the two ends of the rear beam of the inner frame are respectively fixedly connected to the closed frame through connecting components, and the two ends of the middle beam are respectively connected to the closed frame through connecting components. The connecting component is fixedly connected to the closed frame, the two ends of the first longitudinal beam are respectively fixedly connected to the front end beam of the inner frame and the rear end beam of the inner frame, and the two ends of the second longitudinal beam are respectively fixedly connected to the The front end beam of the inner frame and the rear end beam of the inner frame, one end of the left front beam is connected to the first longitudinal beam, and is arranged on the side of the first longitudinal beam opposite to the second longitudinal beam, One end of the right front beam is connected to the second longitudinal beam, and is arranged on the side of the second longitudinal beam opposite to the first longitudinal beam. The front end beam of the inner frame, the middle beam and the The rear end beam of the inner frame is distributed along the first direction, and the left front beam and the right front beam are located between the middle beam and the front end beam of the inner frame.

Optionally, at least one side of the beam in the first direction is provided with a boss, the battery module is directly or indirectly fixedly connected to the module end plate, and the module end plate is installed on the boss side.

Optionally, the lower side of the cross beam is flush with the lower end surface of the battery module, and attached to the upper side of the cooling plate.

Optionally, a gap is provided between the lower cover and the cooling plate.

According to a second aspect of the present utility model, a vehicle is provided, including the power battery system and the vehicle casing involved in the first aspect and its optional solution, the power battery system is arranged in the vehicle casing.

In the vehicle and its power battery system provided by the utility model, the traditional battery pack shell is integrated with the chassis frame of the whole vehicle, and further, there is no need for a battery module outside the battery inner frame beam assembly and the chassis frame assembly. The battery case is provided separately, which effectively improves the space layout efficiency of the vehicle, and realizes the weight reduction and cost reduction of the vehicle. At the same time, the overall structure of the battery pack (that is, the battery module, battery inner frame beam assembly, In addition, due to the formation of the layout space of the battery module, the battery case does not need to occupy space, and in turn, more power can be arranged to increase the cruising range of the vehicle. At the same time, the utility model also integrates a cooling plate, which can effectively improve the heat dissipation capacity of the power battery system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is a structural schematic diagram 1 of a power battery system in an embodiment of the utility model;

Fig. 2 is a structural schematic diagram II of the power battery system in an embodiment of the utility model;

Fig. 3 is a structural schematic diagram of the chassis frame assembly in an embodiment of the present invention;

Fig. 4 is a schematic structural view of the battery inner frame beam assembly in an embodiment of the present invention;

Fig. 5 is a structural schematic diagram of the chassis frame assembly and the battery inner frame beam assembly in an embodiment of the present invention;

Fig. 6 is a partially enlarged view of area A in Fig. 5;

Fig. 7 is a partial structural schematic diagram of the power battery system in an embodiment of the utility model;

FIG. 8 is a partially enlarged view of area C in FIG. 7 .

Explanation of reference signs:

1-top cover; 2-chassis frame assembly; 3-battery inner frame beam assembly; 4-battery module; 5-cooling plate; 6-lower cover; 7-connecting plate; 8-module end plate;

101 - sealing flange surface of the upper cover;

201-chassis front beam; 202-chassis rear beam; 203-transition sheet metal; 204-right front longitudinal beam; 205-right threshold beam; 206-right rear longitudinal beam; 207-transition sheet metal; 208-transition sheet metal; 209-left front longitudinal beam; 210-left threshold beam; 211-left rear longitudinal beam; 212-transition sheet metal;

301-the first longitudinal beam; 302-the second longitudinal beam; 303-the front beam of the inner frame; 304-the rear beam of the inner frame; 305-the right front beam; 306-the left front beam; 307-the middle beam;

601-The sealing flange surface of the lower cover;

701-main body; 702-groove body; 703-flange 704-groove bottom.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the utility model specification, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "upper end", "lower end", "lower surface" and "upper surface" are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as Limitations on the Invention.

In the description of the specification of the present utility model, the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features.

In the description of the present utility model, "a plurality" means a plurality, such as two, three, four, etc., unless otherwise specifically defined.

In the description of this utility model specification, unless otherwise clearly stipulated and limited, the term "connection" and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integration; it can be a mechanical A connection can also be an electrical connection or can communicate with each other; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two components or an interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

The technical scheme of the utility model is described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

Please refer to Figure 1 and Figure 2, the power battery system of the vehicle, including: battery inner frame beam assembly 3, chassis frame assembly 2 of the vehicle, upper cover 1, lower cover 6, cooling plate 5 and battery module 4 .

The chassis frame assembly 2 has a closed frame forming a closed loop, and the upper cover 1 and the lower cover 6 are respectively arranged on the upper side and the lower side of the closed frame. Specifically, the upper cover 1 and the lower cover 6 can be The upper side and the lower side of the closed frame are respectively fixedly connected, and an arrangement space can be formed between the upper cover and the lower cover and inside the closed frame.

The battery inner frame beam assembly 3 and the battery module 4 are arranged in the arrangement space, the battery inner frame beam assembly 3 is fixedly connected to the chassis frame assembly 2, and the battery module 4 is arranged in the The battery inner frame beam assembly 3 and the cooling plate 5 are arranged on the lower side of the closed frame and the battery module, and the upper side of the lower cover 6 .

Wherein, the chassis frame assembly 2 is the chassis foundation of the vehicle. In the embodiment of the present invention, the chassis frame assembly 2 can be used to indirectly realize the installation of the battery module 4 .

In a specific example, the surrounding sealing frame provided on the chassis frame assembly 3 can be used as the outer frame structure of the battery and other structures; the surrounding sealing frame can form the space envelope of the battery pack with its upper and lower end surfaces, as the arrangement of battery components Space; the battery inner frame beam assembly 2 is arranged in the chassis frame beam assembly 3 as the inner frame beam of the battery pack, which is connected with the chassis frame beam assembly to form a complete battery pack shell frame structure.

The battery module 4 is installed on the battery frame beam assembly 3, and the weight of the entire battery module is borne by the overall chassis frame beam; a cooling plate is provided at the bottom of the battery module, and the cooling plate realizes liquid cooling through a liquid cooling medium, for example. plate, in other examples, the cooling medium in the cooling plate can also be a gas cooling medium, the cooling plate is installed on the lower end surface of the battery frame beam assembly 3, and the lower end surface of the battery module 4 is attached to the cooling plate 5; the upper cover 1 Installed on the upper end surface of the vehicle frame beam assembly 2, and a sealed connection may be provided between the upper cover 1 and the upper end surface of the vehicle frame beam assembly 2; the lower cover 6 is installed on the lower end surface of the vehicle frame beam assembly 2, and A sealed connection is provided between the lower cover 6 and the lower end surface of the vehicle frame beam assembly 2 .

In the above scheme, the traditional battery pack shell is integrated with the chassis frame of the whole vehicle. Furthermore, in addition to the battery inner frame beam assembly and the chassis frame assembly, there is no need to set up a battery shell for the battery module, which effectively improves the battery life. The space layout of the whole vehicle is efficient, and realizes the weight reduction and cost reduction of the whole vehicle. At the same time, the strength and torsion of the overall structure of the battery pack (that is, the overall structure of the battery module, the battery inner frame beam assembly, and the chassis frame assembly) are improved. Rigidity; In addition, due to the formation of the layout space of the battery module, the battery case does not need to occupy space, and in turn, more power can be arranged to increase the cruising range of the vehicle. At the same time, the utility model also integrates a cooling plate, which can effectively improve the heat dissipation capacity of the power battery system.

In one of the implementation manners, please refer to FIG. 3 , the closed frame includes a chassis front beam 201, a chassis rear beam 202, a left sill beam 210, a right sill beam 205, a left front longitudinal beam 209, a right front longitudinal beam 204, a left rear Longitudinal beam 211, right rear longitudinal beam 206;

The front, rear, left, and right are described based on the front, rear, left, and right of the vehicle.

The front end of the left sill beam 210 is connected to the rear end of the left front longitudinal beam 209, the front end of the left front longitudinal beam 209 is directly or indirectly connected to the left end of the chassis front cross beam 201, and the front end of the right sill beam 205 is connected to the Referring to the rear end of the right front longitudinal beam 204, the front end of the right front longitudinal beam 204 is directly or indirectly connected to the right end of the chassis front end beam 201, the rear end of the left threshold beam 210 is connected to the front end of the left rear longitudinal beam 211, The left rear longitudinal beam 211 is directly or indirectly connected to the left end of the chassis rear cross member 202, the rear end of the right door sill beam 205 is connected to the front end of the right rear longitudinal beam 206, and the right rear longitudinal beam 206 is directly or indirectly Indirectly connect the right end of the rear end beam 202 of the chassis;

in:

The heights of the left front side beam 209 and the right front side beam 204 are as follows: the height of the front end is higher than the height of the rear end; specifically, part or all of the left front side beam 209 can realize a gradual change in height from front to back, and the right front side beam Part or all of 204 can achieve a gradual reduction in height from front to back;

The heights of the left rear longitudinal beam 211 and the right rear longitudinal beam 206 are as follows: the height of the rear end is higher than the height of the front end; specifically, part or all of the left rear longitudinal beam 211 can achieve a gradual height change from front to rear, Part or all of the right rear longitudinal beam 206 can achieve a gradual height change from front to back;

Wherein, the comparison of the height of the front end and the height of the rear end may include, for example: the comparison of the height of the front end of the upper surface of the corresponding stringer and the rear end of the upper surface, the comparison of the height of the front end of the lower surface of the corresponding stringer and the rear end of the lower surface, and the comparison of the front end of the axis of the stringer and Backend height comparison.

In the illustrated example, the enclosing frame may also include transition sheet metal.

For example, the closed frame satisfies at least one of the following:

The part of the upper side of the left front side beam 209 close to the front end cross beam 201 of the chassis forms a first height difference with the upper side of the front end cross beam 201 of the chassis, which can also be understood as: at the junction of the front left side beam 209 and the front end cross beam 201 of the chassis, The upper side of the left front side member 209 and the upper side of the chassis front end cross member 201 form a first height difference; The first height difference can also be understood as: at the junction of the right front side beam 204 and the chassis front end cross beam 201, the upper side of the right front side beam 204 and the upper side of the chassis front end cross beam 201 form a first height difference; A transition sheet metal 208 is provided between the cross beam 201 and the left front longitudinal beam 209 to realize the transition of the first height difference, and a transition sheet metal is provided between the chassis front end cross beam 201 and the right front longitudinal beam 204 203, used to realize the transition of the first height difference; the first height difference may be that the upper surface of the front end cross member of the chassis is higher, or that the upper surface of the front end cross member of the chassis is lower;

The part of the lower side of the left front side beam 209 close to the chassis front end cross beam 201 and the lower side of the chassis front end cross beam 201 form a second height difference, which can also be understood as: at the connection between the left front side beam 209 and the chassis front end cross beam 201, The lower side of the left front side member 209 and the lower side of the chassis front end cross member 201 form a second height difference; The first height difference can also be understood as: at the junction of the right front side beam 204 and the chassis front end cross beam 201, the lower side of the right front side beam 204 and the lower side of the chassis front end cross beam 201 form a second height difference; A transition sheet metal 208 is provided between the cross beam 201 and the left front longitudinal beam 209 to realize the transition of the second height difference, and a transition sheet metal is provided between the chassis front end cross beam 201 and the right front longitudinal beam 204 , used to realize the transition of the first height difference; wherein the second height difference may be that the upper surface of the front end cross member of the chassis is higher, or that the upper surface of the front end cross member of the chassis is lower;

In some examples, the first height difference and the second height difference may not be formed.

For another example, the closed frame satisfies at least one of the following:

The part of the upper side of the left rear longitudinal beam 211 close to the chassis rear end cross beam 202 forms a third height difference with the upper side of the chassis rear end cross beam 202, which can also be understood as: between the left rear longitudinal beam 211 and the chassis rear end cross beam 202, the upper side of the left rear longitudinal beam 211 and the upper side of the chassis rear end cross beam 202 form a third height difference; the upper side of the right rear longitudinal beam 206 close to the chassis rear end cross beam 202 and the chassis The upper side of the rear end beam 202 forms the third height difference, which can also be understood as: at the junction of the right rear side beam 206 and the chassis rear end beam 202, the upper side of the right rear side beam 206 and the chassis rear end beam 202 The upper side of the upper side of the chassis forms a third height difference; a transition sheet metal 212 is provided between the chassis rear end beam 202 and the left rear longitudinal beam 211 to realize the transition of the third height difference, and the chassis rear A transition sheet metal 207 is provided between the end beam 202 and the right rear longitudinal beam 206 to realize the transition of the third height difference; the third height difference may be that the upper surface of the rear end beam of the chassis is higher , it can also be that the upper surface of the rear end beam of the chassis is lower, as shown in the figure: the upper surface of the rear end beam of the chassis is lower;

The part of the lower side of the left rear longitudinal beam 211 close to the chassis rear end beam 202 and the lower side of the chassis rear end beam 202 form a fourth height difference, which can also be understood as: between the left rear longitudinal beam 211 and the chassis rear end beam 202, the lower side of the left rear longitudinal beam 211 and the lower side of the chassis rear end cross member 202 form a fourth height difference; the lower side of the right rear longitudinal beam 206 close to the chassis rear end cross member 202 and the chassis The lower side of the rear end beam 202 forms the fourth height difference, which can also be understood as: at the junction of the right rear longitudinal beam 206 and the chassis rear end beam 202, the lower side of the right rear longitudinal beam 206 and the chassis rear end beam 202 The lower side of the chassis forms a fourth height difference; a transition sheet metal is provided between the chassis rear end beam 202 and the left rear longitudinal beam 211 to realize the transition of the fourth height difference, and the chassis rear end A transition sheet metal is provided between the crossbeam 202 and the right rear longitudinal beam 206 to realize the transition of the fourth height difference; the fourth height difference may be that the upper surface of the front end crossbeam of the chassis is higher, or It is the lower upper surface of the front end cross member of the chassis.

Furthermore, in a specific example, the left sill beam 210, the right sill beam 205, the chassis front end beam 201, the right end beam 202, the left front side beam 209, the right front side beam 204, the left rear side beam 211 and the right rear side beam 206 can be welded together The closed frame formed afterwards is used as the outer frame structure of the battery frame beam assembly 3 (which can also be regarded as the battery pack shell), that is, the chassis frame assembly of the whole vehicle is used as a part of the main structure of the battery pack, and the closed frame formed by the chassis frame assembly The inner envelope formed by the frame and its upper and lower end surfaces is the layout space for the internal parts of the battery, while the upper and lower end surfaces of the chassis frame assembly are respectively used as the upper and lower sealing surfaces of the battery case.

In order to make the overall sealing surface continuous, in the vehicle frame beam assembly 2, there is a large height difference between the upper end surface of the beam and the upper end surface of the longitudinal beam, and a corresponding transition sheet metal structure is set, and the transition sheet metal is welded on the beam and the longitudinal beam. Smoothly transition the height difference between the end faces to form a continuous sealing surface. Similarly, where there is a large height difference between the lower end surface of the beam and the lower end surface of the longitudinal beam, a transitional sheet metal structure is also provided. The quantity and shape of the transitional sheet metal should be adjusted as needed, and at the same time, the position where the transitional sheet metal is combined with the beam or longitudinal beam is filled with sealant to block the gap between the sheet metals.

In one of the implementation manners, please refer to FIG. 4 , the battery inner frame beam assembly 3 includes longitudinal beams arranged along a first direction and cross beams arranged along a second direction, and the first direction is perpendicular to the second direction , the first direction matches the front-rear direction of the vehicle, and the second direction matches the left-right direction of the vehicle;

At least one end of the beam is fixedly connected to the inner side of the closed frame through a corresponding connection assembly 7, and the two ends of the longitudinal beam are fixedly connected to the beam;

Wherein, the battery modules are distributed between adjacent beams, between adjacent longitudinal beams, and between the longitudinal beams and the closed frame.

Fig. 4 shows an alternative scheme for the distribution of longitudinal beams and cross beams, and the actual number, position and connection relationship of longitudinal beams and cross beams are not limited thereto.

Wherein, the longitudinal beams in the battery inner frame beam assembly 3 include first longitudinal beams 301 and second longitudinal beams 302; the beams in the battery inner frame beam assembly 3 include inner frame front beams 303, inner frame rear End beam 304, middle beam 307, left front beam 306 and right front beam 305;

The two ends of the front end crossbeam 303 of the inner frame are respectively fixedly connected to the closed frame through the connection assembly 7, for example, the left front longitudinal beam 209 and the right front longitudinal beam 204 in the closed frame are connected, and the two ends of the rear end crossbeam 304 of the inner frame are respectively The closed frame is fixedly connected by the connecting assembly 7, for example, the left rear longitudinal beam 211 and the right rear longitudinal beam 206 in the closed frame are connected; the two ends of the middle beam 307 are respectively fixedly connected to the closed frame by the connecting assembly 7, for example Connect the left sill beam 210 and the right sill beam 205 in the closed frame.

Both ends of the first longitudinal beam 301 are respectively fixedly connected to the front end beam 303 of the inner frame and the rear end beam 304 of the inner frame, and the two ends of the second longitudinal beam 302 are respectively fixedly connected to the front end beam 303 of the inner frame. One end of the inner frame rear end beam 304 and the left front beam 306 is connected to the first longitudinal beam 301 , and is arranged on the side of the first longitudinal beam 301 opposite to the second longitudinal beam 302 One end of the right front beam 305 is connected to the second longitudinal beam 302, and is arranged on the side of the second longitudinal beam 302 opposite to the first longitudinal beam 301, the inner frame front end beam 303, The middle cross beam 307 and the inner frame rear end cross beam are distributed along the first direction, and the left front cross beam 306 and the right front cross beam 305 are located between the middle cross beam 307 and the inner frame front end cross beam 303 .

It can be seen that in a specific example, the two ends of the first longitudinal beam 301 and the second longitudinal beam 302 are respectively welded to the front end beam 303 of the inner frame and the rear end beam 304 of the inner frame, and the first longitudinal beam 301 and the second longitudinal beam 302 are welded to the inner frame rear end beam 304 respectively. The middle beam 307 is welded at the overlapping position, and the right end of the left front beam 306 is welded to the first longitudinal beam 301, and the left end of the right front beam 305 is welded to the second longitudinal beam 302 to form the battery inner frame beam assembly.

It can be seen that in the specific example of the above solution, the battery inner frame beam assembly 3 is arranged in the closed frame of the chassis frame assembly 2, and the battery inner frame assembly and the chassis frame assembly are mechanically connected together to form an integral battery pack The frame structure greatly improves the structural strength and torsional rigidity of the battery pack. The connection between the battery inner frame assembly and the chassis frame assembly can be directly welded or connected by connecting plates according to the materials of the battery frame assembly and the chassis frame assembly.

Specifically, the beams and longitudinal beams in the battery inner frame beam assembly 3 can be made of aluminum alloy, while the chassis frame is made of steel, so the connection between the battery frame assembly and the chassis frame adopts a connection plate transfer scheme: the front end The two ends of the crossbeam, the middle crossbeam and the rear end crossbeam, and the left end of the left front crossbeam and the right end of the right end crossbeam are riveted with their matching connecting plates to realize the connection between the crossbeam and the chassis frame assembly. After the battery pack frame beam assembly is connected to the chassis frame beam assembly, the battery frame beam assembly and the vehicle chassis frame beam assembly not only form an overall battery pack frame structure, but also divide the battery envelope space into several adjacent frames. grid, and the battery modules are arranged in the grid to realize the limit of the battery module in the plane direction.

In one of the implementation manners, please refer to FIG. 5 and FIG. 6, the connection assembly may include a connection plate 7, for example, a left front side beam 209, a right front side beam 204, a left door sill beam 210, a right door sill beam 205, and a left rear side beam 211. Eight connection assemblies (each connection assembly may include a connection plate 7 ) are co-riveted with the inner surface of the right rear longitudinal beam 206 for connecting the battery pack inner frame assembly and the chassis frame assembly together. The connecting plate and the chassis frame can be connected together by riveting and welding.

In one example, please refer to FIG. 6, the connecting plate 7 includes a main body 701 and a groove body 702 provided on the first side surface of the main body, and the connection part of the beam in the battery inner frame beam assembly 3 is embedded The tank body; the connection part is fixedly connected between the tank body and the lower cover through a first connecting part (such as a threaded assembly, etc.), and the tank bottom of the tank body 702 and the lower cover are respectively Located on the upper side and the lower side of the connecting portion;

The main board body 701 is fixedly connected to the inner side of the vehicle frame beam assembly 2 (for example, the corresponding part of its closed frame) through the second connecting portion.

The second side surface of the main board body 701 is provided with a sealant groove (the back side of the sealant groove can form a groove bottom 704), the sealant groove is coated with sealant, and the sealant is sealed on the Between the main body and the side wall of the vehicle frame.

The lower end of the first side surface of the main board body 701 is further provided with a flange 703, and the flange 703 can be fixedly connected to the corresponding beam (such as its boss) through the third connecting portion.

In a further solution, please refer to Figure 4, Figure 6 to Figure 8, at least one side of the beam in the first direction is provided with a boss 308, and the battery module 4 is directly or indirectly fixedly connected to the module An end plate 8 , the module end plate 8 is installed on the upper side of the boss 308 .

The cross-section of the middle beam 307 (including the bosses 308 on the front and rear sides) is an inverted T shape, the front beam 303 (including the boss 308 on the rear side), the rear beam 304 (including the boss 308 on the front side), The left front beam 306 (including the boss 308 on the rear side) and the right front beam 305 (including the boss 308 on the rear side) have an L-shaped cross section. It can be seen that the bottom of the beam is provided with a boss for the installation of the battery module. Realize the height direction positioning of the battery module.

Further, the upper end surface of the boss of each crossbeam is provided with a mounting hole for installing a blind rivet nut, so as to install and fix the battery module and the crossbeam. The cross section of the longitudinal beam is zigzag. The beams and longitudinal beams can be selected from extruded aluminum alloy process or steel plate rolling process.

In addition, the arrangement of the battery inner frame beam assembly shown in the figure is only one implementation method, and the number and position of the cross beams and longitudinal beams can be adjusted according to the actual module size and the envelope size of the chassis frame assembly.

In one of the implementations, please refer to FIG. 2, and in combination with other drawings, the upper cover 1 is provided with an upper cover sealing flange surface 101 for sealing the transition sheet metal; the lower cover 6 is provided with a The sealing flange surface 601 of the lower cover of the transition sheet metal is used for sealing.

In a specific example, the upper cover 1 and the lower cover 6 are both stamped sheet metal structures. The upper cover sealing flange surface 101 at the lower part of the upper cover 1 is a sealing surface with continuous curvature, and the overall contour curvature corresponds to the sealing surface formed by the upper end surface of the chassis frame assembly and the upper end transition sheet metal. The sealing method between the upper cover and the upper end surface of the chassis frame assembly can use sealing foam or RTV sealant. In this example, considering maintainability, sealing foam is used for sealing. The upper cover and the upper end surface of the chassis frame assembly are fastened and connected by bolts.

The lower cover sealing flange surface 601 on the upper part of the lower cover 6 is a sealing surface with continuous curvature, and the overall contour curvature corresponds to the sealing surface formed by the lower end surface of the chassis frame assembly and the lower end transition sheet metal. The sealing method between the lower cover and the lower end surface of the chassis frame assembly can adopt sealing foam or RTV sealant. The lower cover and the lower end surface of the vehicle chassis are fastened and connected by bolts.

There is a gap between the lower cover 6 and the cooling plate 5 , and further, buffer foam can be arranged according to needs, which is beneficial to improve the performance of the battery pack against bottom ball hitting and NVH performance. Through the gap, a cushioning effect can be achieved, which is beneficial to improving the performance of the battery against hitting the bottom ball.

In a further solution, the lower side of the beam (that is, the beam in the battery inner frame beam assembly 3) is flush with the lower end surface of the battery module, and is attached to the upper side of the cooling plate, and further, It can effectively improve the efficiency of heat exchange and ensure the heat dissipation performance.

In a specific example, the cooling plate 5 can be a liquid-cooled plate, and the liquid-cooled plate is arranged on the lower end surface of the battery inner frame beam assembly, and can be installed on the lower end surface of the battery inner frame beam assembly through FDS or bolted connection. The cold plate, the battery inner frame beam assembly and the chassis frame assembly form an integral rigid connection, which further improves the overall structural bearing strength and rigidity of the battery pack. Further, the top surface of the liquid cooling plate is attached to the bottom surface of the battery inner frame beam assembly. The liquid cold plate adopts an integral molding process, which can be an extruded harmonica tube or a brazed liquid cold plate at the upper and lower ends.

In the illustrated example, the battery module can be arranged vertically in the grid formed by the battery inner frame beam assembly and the chassis frame assembly, and installed on the crossbeam of the battery inner frame beam assembly. In other embodiments, the module can also be arranged horizontally in the grid formed by the battery inner frame beam assembly and the chassis frame assembly, and installed on the longitudinal beam of the battery inner frame beam assembly. The cross section of the longitudinal beam needs to be adaptable. Adjustment increases the installation boss, and the number of longitudinal beams needs to be adaptively increased.

In a specific example, there is a height difference between the lower end surface of the module end plate 8 and the lower end surface of the battery module 4. After the module end plate 8 is installed on the boss at the bottom of the beam, the lower end surface of the module and the inner frame beam of the battery The lower end surface of the assembly (beam) is flush to ensure that after the liquid cooling plate is installed, the lower end surface of the module is attached to the liquid cooling plate to achieve high-efficiency heat exchange.

To sum up, in the specific scheme of the utility model, the battery pack shell is integrated with the chassis frame of the whole vehicle, which improves the space layout efficiency of the whole vehicle, and can realize weight reduction and cost reduction of the whole vehicle. The frame is connected as a whole to form a criss-cross complete battery pack shell frame structure, which greatly improves the structural strength and rigidity of the battery pack, and also connects the integrated water-cooled plate to the bottom of the inner frame beam of the battery pack as a whole, further improving the stability of the battery pack structure. overall stiffness.

In addition, the chassis frame and the inner frame beam of the battery are used as load-bearing structural parts, and the lower cover is not used as the main force-bearing structural part of the battery pack, and there is a buffer gap between the lower cover and the liquid cooling plate, which is conducive to improving the battery's resistance to bottom balls .

The embodiment of the utility model also provides a vehicle, including the power battery system and the vehicle casing involved in the above optional solution, and the power battery system is arranged in the vehicle casing.

In the description of this specification, descriptions referring to terms such as "one embodiment", "an embodiment", "a specific implementation process", "an example" mean specific features described in conjunction with the embodiment or example, A structure, material, or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the embodiments of the present utility model Scope of technical solutions.

Claims (10)

1. A power battery system for a vehicle, comprising: the vehicle comprises a battery inner frame beam assembly, a chassis frame assembly of the vehicle, an upper cover, a lower cover, a cooling plate and a battery module;

the chassis frame assembly has a closed frame forming a closed loop, the upper cover and the lower cover are respectively arranged on the upper side and the lower side of the closed frame, so that an arrangement space is formed between the upper cover and the lower cover on the inner side of the closed frame, the battery inner frame beam assembly is arranged on the battery module, the battery inner frame beam assembly is fixedly connected with the chassis frame assembly, the battery module is arranged on the battery inner frame beam assembly, and the cooling plate is arranged on the lower side of the closed frame and the battery module and on the upper side of the lower cover.

2. The power battery system of claim 1, wherein the closed perimeter frame comprises a chassis front end cross beam, a chassis rear end cross beam, a left threshold beam, a right threshold beam, a left front longitudinal beam, a right front longitudinal beam, a left rear longitudinal beam, a right rear longitudinal beam;

the front end of the left threshold beam is connected with the rear end of the left front longitudinal beam, the left front longitudinal beam is directly or indirectly connected with the left end of the chassis front end cross beam, the front end of the right threshold beam is connected with the rear end of the right front longitudinal beam, the right front longitudinal beam is directly or indirectly connected with the right end of the chassis front end cross beam, the rear end of the left threshold beam is connected with the front end of the left rear longitudinal beam, the left rear longitudinal beam is directly or indirectly connected with the left end of the chassis rear end cross beam, the rear end of the right threshold beam is connected with the front end of the right rear longitudinal beam, and the right rear longitudinal beam is directly or indirectly connected with the right end of the chassis rear end cross beam;

wherein:

the height of the left front stringer and the right front stringer appears as: the front end is higher than the rear end;

the height of the left rear longitudinal beam and the right rear longitudinal beam is represented as: the rear end height is higher than the front end height.

3. Power battery system according to claim 2,

the closed frame meets at least one of the following conditions:

a first height difference is formed between the part of the upper side surface of the left front longitudinal beam, which is close to the cross beam at the front end of the chassis, and the upper side surface of the cross beam at the front end of the chassis; transition metal plates are arranged between the chassis front end cross beam and the left front longitudinal beam and between the chassis front end cross beam and the right front longitudinal beam and are used for realizing the transition of the first height difference;

a part of the lower side surface of the left front longitudinal beam, which is close to the front cross beam of the chassis, forms a second height difference with the lower side surface of the front cross beam of the chassis, and a part of the lower side surface of the right front longitudinal beam, which is close to the front cross beam of the chassis, forms the second height difference with the lower side surface of the front cross beam of the chassis; transition metal plates are arranged between the chassis front end cross beam and the left front longitudinal beam and between the chassis front end cross beam and the right front longitudinal beam and are used for realizing the transition of the second height difference;

a third height difference is formed between the part of the upper side surface of the left rear longitudinal beam, which is close to the cross beam at the rear end of the chassis, and the upper side surface of the right rear longitudinal beam, which is close to the cross beam at the rear end of the chassis, and the upper side surface of the cross beam at the rear end of the chassis; transition metal plates are arranged between the chassis rear end cross beam and the left rear longitudinal beam and between the chassis rear end cross beam and the right rear longitudinal beam and are used for realizing the transition of the third height difference;

a part of the lower side surface of the left rear longitudinal beam, which is close to the chassis rear end cross beam, and the lower side surface of the chassis rear end cross beam form a fourth height difference, and a part of the lower side surface of the right rear longitudinal beam, which is close to the chassis rear end cross beam, and the lower side surface of the chassis rear end cross beam form the fourth height difference; transition metal plates are arranged between the chassis rear end cross beam and the left rear longitudinal beam and between the chassis rear end cross beam and the right rear longitudinal beam and used for achieving transition of the fourth height difference.

4. The power battery system according to claim 3, wherein the upper cover is provided with an upper cover sealing flange surface for sealing and butting against the transition metal plate therein;

the lower cover is provided with a lower cover sealing flange surface which is used for sealing and butting the transition metal plate.

5. The power cell system of any of claims 1 to 4, wherein the cell inner frame beam assembly comprises longitudinal beams arranged in a first direction and transverse beams arranged in a second direction, the first direction being perpendicular to the second direction, the first direction matching a fore-aft direction of the vehicle, the second direction matching a left-right direction of the vehicle;

at least one end of the cross beam is fixedly connected with the inner side of the closed frame through a corresponding connecting assembly, and two ends of the longitudinal beam are fixedly connected with the cross beam;

the battery modules are distributed between the adjacent cross beams, between the adjacent longitudinal beams and between the longitudinal beams and the closed frame.

6. The power cell system of claim 5, wherein the longitudinal beams in the cell inner frame beam assembly comprise a first longitudinal beam, a second longitudinal beam; the cross beams in the battery inner frame beam assembly comprise a front end cross beam, an inner frame rear end cross beam, a middle cross beam, a left front cross beam and a right front cross beam;

the two ends of the front end cross beam are respectively fixedly connected with the closed frames through the connecting assemblies, the two ends of the inner frame rear end cross beam are respectively fixedly connected with the closed frames through the connecting assemblies, the two ends of the middle cross beam are respectively fixedly connected with the closed frames, the two ends of the first longitudinal beam are respectively fixedly connected with the front end cross beam and the inner frame rear end cross beam, the two ends of the second longitudinal beam are respectively fixedly connected with the front end cross beam and the inner frame rear end cross beam, one end of the left front cross beam is connected with the first longitudinal beam and is arranged on one side of the first longitudinal beam, the back of the first longitudinal beam is arranged on the other side of the second longitudinal beam, one end of the right front cross beam is connected with the second longitudinal beam and is arranged on one side of the second longitudinal beam, the front end cross beam is arranged on the middle cross beam and the inner frame rear end cross beam along the first direction, and the left front cross beam is arranged on the right front cross beam and between the middle cross beam and the front end cross beam.

7. The power battery system of claim 5, wherein at least one side of the cross beam in the first direction is provided with a boss, the battery module is directly or indirectly fixedly connected with a module end plate, and the module end plate is mounted on the upper side of the boss.

8. The power cell system of claim 5, wherein the lower side of the cross beam is flush with the lower end face of the battery module and abuts the upper side of the cooling plate.

9. Power cell system according to any of claims 1 to 4, characterized in that a gap is provided between the lower cover and the cooling plate.

10. A vehicle comprising a power battery system according to any one of claims 1 to 8 and a vehicle enclosure, said power battery system being disposed within said vehicle enclosure.

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