CN117543147A

CN117543147A - Box, battery box and battery package on battery package

Info

Publication number: CN117543147A
Application number: CN202311442174.9A
Authority: CN
Inventors: 闫永强; 汤文博; 曹高强
Original assignee: Zhengzhou Shenlan Power Technology Co Ltd
Current assignee: Zhengzhou Shenlan Power Technology Co Ltd
Priority date: 2023-11-01
Filing date: 2023-11-01
Publication date: 2024-02-09

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery pack upper box body, a battery box body and a battery pack. The upper box body of the battery pack comprises a top wall and side walls which are respectively connected to the left end and the right end of the top wall, and the two side walls are connected with the top wall to form an n-shaped upper box body, and the upper box body is characterized in that: the side wall comprises an inclined section connected with the top wall and a vertical section connected with the inclined section, and the projection of the upper end of the inclined section in the horizontal plane is positioned on the inner side of the projection of the lower end of the inclined section in the horizontal plane. The projection of the upper end of the inclined section of the side wall of the upper box body in the horizontal plane is arranged on the inner side of the projection of the lower end of the inclined section in the horizontal plane, so that a certain included angle is formed between the top wall and the side wall, a drawing angle is not required to be additionally designed, drawing of a die is convenient when the upper box body is formed, the difficulty of demoulding is reduced, and the demoulding efficiency is improved; meanwhile, the occupied space of the upper box body in the width direction is reduced, so that the volume utilization rate and the energy density of the battery system are improved.

Description

Box, battery box and battery package on battery package

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a battery pack upper box body, a battery box body and a battery pack.

Background

At present, the new energy automobile has higher and higher energy density requirements for a battery system due to the requirement on cruising ability, and the space utilization rate of the battery box body is required to be as high as possible. The common battery box is generally enclosed by last box and lower box and closes the accommodation space who forms and be used for installing the battery, goes up the box and all designs the flange structure that deviates from accommodation space extension with lower box cooperation junction, because this flange structure needs to occupy the certain volume space of battery system, leads to battery system space utilization low, influences the problem of battery energy density.

As an improvement, chinese patent publication No. CN219203382U discloses a battery comprising a first case (i.e., an upper case) including a first end wall (i.e., a top wall) and a first side wall (i.e., a side wall), and a second case including a second end wall disposed opposite to the first end wall in a height direction of the battery case, the second end wall having a first side in a width direction of the battery case, one end of the first side wall of the first case being connected to the first side of the second end wall; the first box has connecting portion along the both ends of the length direction of box, and connecting portion include first plane (i.e. horizontal flange limit), second plane (i.e. vertical flange limit) and be used for connecting first plane and second plane and make the two transition surfaces of smooth transition, wherein, the transition surface is cambered surface or inclined plane. The connection of the first box body and the second box body can be realized under the condition that the flange structure along the width direction of the battery box body is not arranged, so that the space utilization rate in the width direction of the battery box body is improved, and the volume energy density of the battery is further improved.

In practical application, a certain gap is reserved between the side wall of the box body and the battery module, and the first end wall of the first box body containing the first flat surface and the first side wall containing the second flat surface are mutually perpendicular, so that a certain unused space still exists between the inner wall of the box body and the side part of the battery module, and the space utilization rate and the volume energy density are still possibly further improved; meanwhile, when the first box body is integrally formed by compression molding, the first side wall comprising the second straight surface is the same as the drawing direction, and the first box body is difficult to demould after being formed.

Disclosure of Invention

The utility model aims to provide a battery pack upper box body so as to solve the problems that the current battery pack upper box body is difficult to draw a die due to structural arrangement and the volume energy density is influenced due to low space utilization rate. The utility model also aims to provide a battery box and a battery pack, so as to solve the same problems.

In order to achieve the above purpose, the battery pack upper box body adopts the following technical scheme:

the utility model provides a box on battery package, includes the roof with connect respectively in the lateral wall at both ends about the roof, two the lateral wall with the roof links to each other and forms the box on the n shape, the lateral wall include with the slope section that the roof is connected and with the vertical section that the slope section links to each other, the projection of slope section upper end in the horizontal plane is located the inboard of the projection of slope section lower extreme in the horizontal plane.

The beneficial effects of the technical scheme are that: the present utility model is based on prior art improvements by arranging the side walls of the upper housing to comprise an inclined section connected to the top wall and a vertical section connected to the inclined section, with the projection of the upper end of the inclined section in the horizontal plane being located inside the projection of the lower end of the inclined section in the horizontal plane. In this way, the inclined section connected with the top wall is arranged in the side wall of the upper box body, and the projection of the upper end of the inclined section in the horizontal plane is positioned at the inner side of the projection of the lower end of the inclined section in the horizontal plane, so that a certain included angle is formed between the top wall and the side wall, a drawing angle is not required to be designed, drawing of a die is convenient when the upper box body is formed, the difficulty of demoulding is reduced, and the demoulding efficiency is improved; meanwhile, due to the arrangement of the inclined section, the occupied space of the upper box body in the width direction is reduced, so that the volume utilization rate and the energy density of the battery system are improved; the vertical section that links to each other with the slope section for go up the box and can cooperate with lower box through vertical section when being connected with lower box, can realize going up the box and being connected with lower box under the condition that does not set up along last box width direction convex flange structure, thereby improve battery system's space utilization in width direction, and then improve battery system's energy density.

Further, the acute included angle between the plane of the inclined section and the plane of the vertical section is more than 0 DEG and less than or equal to 3 deg.

The beneficial effects of the technical scheme are that: the included angle between the inclined section and the vertical section of the side wall directly provides a drawing angle during compression molding of the upper box body, the drawing angle does not need to be designed separately, and the drawing is convenient during molding of the upper box body; the inclination angle of the inclined section can not influence the assembly of the battery, meanwhile, the installation size of the battery box body in the width direction can be saved, and the volume utilization rate and the energy density of the battery system are improved.

Further, the front and rear ends of the upper case are provided with flange edges for being connected with the lower case in a matched manner, and the flange edges comprise vertical flange edges connected with the vertical sections, inclined flange edges connected with the inclined sections, horizontal flange edges connected with the top wall and transition flange edges connected with the horizontal flange edges and the inclined flange edges.

The beneficial effects of the technical scheme are that: by means of the arrangement, the horizontal flange edge and the vertical flange edge are in smooth transition through the transition flange edge and the inclined flange edge which are sequentially connected, and a good sealing surface can be formed between the flange edge and the lower box body, so that the tightness of the battery is improved; meanwhile, the flange edges are arranged on the multi-section surfaces, so that the structural strength of the flange edges is improved; the front end and the rear end of the upper box body are connected with the lower box body in a matched manner through flange edges, so that the connection stability and the reliability between the upper box body and the lower box body can be improved; the vertical flange edge through setting up is connected with the corresponding part of lower box in order to realize the cooperation of last box and lower box and be connected, need not to set up the flange structure of box width direction on the protrusion again to reduce battery box width direction's size, and then effectively improve battery volume utilization ratio and energy density.

Further, the transition flange edge comprises a first transition cambered surface connected with the horizontal flange edge, a second transition cambered surface connected with the inclined flange edge and a transition inclined surface connected with the first transition cambered surface and the second transition cambered surface.

The beneficial effects of the technical scheme are that: the arrangement of the first transition cambered surface, the transition inclined surface and the second transition cambered surface which are sequentially connected can ensure smooth transition of the horizontal flange edge and the inclined flange edge, and improve the structural strength of the transition flange edge; the flange edge can be matched with the lower box body more tightly at the transition flange edge to form good sealing, so that the sealing performance of the battery box body is improved.

Further, a through hole for threading the fastener is arranged on the transition inclined plane.

The beneficial effects of the technical scheme are that: the first through hole is arranged on the transition inclined plane, so that the processing is more convenient.

Further, a transition spherical surface is connected between the transition flange edge and the top wall and the side wall.

The beneficial effects of the technical scheme are that: by means of the arrangement, in the upper box body forming process, the natural smooth transition between the side wall and the top wall of the upper box body can be guaranteed, dead angles in areas difficult to form do not exist, and the defect of stress concentration at the joint position of the side wall and the top wall can be greatly reduced.

Further, the horizontal flange edge is below the upper surface of the top wall.

The beneficial effects of the technical scheme are that: by means of the arrangement, when the horizontal flange edge is matched with the battery lower box body through the fastening piece, the top of the fastening piece is not higher than the upper surface of the top wall, so that the space utilization rate of the battery pack box body in the height direction can be effectively improved, and the volume energy density of the battery is further improved.

Further, a stepped structure is provided between the inclined section and the vertical section.

The beneficial effects of the technical scheme are that: through set up the ladder structure between slope section and vertical section, strengthened the tensile strength of lateral wall, improved the overall structure intensity of last box.

In order to achieve the above purpose, the battery box body in the utility model adopts the following technical scheme:

the utility model provides a box on battery box, includes box and battery package down, the box include the roof with connect respectively in both ends lateral wall about the roof, two the lateral wall with the roof links to each other and forms the box on the n shape, the lateral wall include with the slope section that the roof is connected and with the vertical section that the slope section links to each other, the projection of slope section upper end in the horizontal plane is located the inboard of the projection of slope section lower extreme in the horizontal plane.

Further, the horizontal flange edge is below the upper surface of the top wall.

In order to achieve the above purpose, the battery pack of the present utility model adopts the following technical scheme:

the utility model provides a battery package, includes the battery and is used for holding the battery box of battery, and the battery box includes box and battery package upper box down, battery package upper box include the roof with connect respectively in the roof left and right sides wall at both ends, two the lateral wall with the roof links to each other and forms the box on the n shape, the lateral wall include the slope section of being connected with the roof and with the vertical section that the slope section links to each other, the projection of slope section upper end in the horizontal plane is located the inboard of the projection of slope section lower extreme in the horizontal plane.

Further, the horizontal flange edge is below the upper surface of the top wall.

Drawings

FIG. 1 is a schematic diagram of a battery pack upper case structure according to the present utility model;

FIG. 2 is a partial schematic view of FIG. 1;

fig. 3 is an enlarged view at a in fig. 2.

In the figure: 100. an upper case; 1. a top wall; 2. a sidewall; 3. an opening;

11. a horizontal flange edge; 111. a first through hole; 12. a transition flange edge; 121. a first transitional cambered surface; 122. a transition inclined plane; 123. a second transitional cambered surface; 13. a transitional sphere; 21. an inclined section; 211. tilting the flange edge; 22. a vertical section; 221. a vertical flange edge; 222. and a second through hole.

Detailed Description

The features and capabilities of the present utility model are described in further detail below in connection with the examples.

The upper box body of the battery pack comprises a top wall and side walls respectively connected to the left end and the right end of the top wall, the two side walls are connected with the top wall to form an n-shaped upper box body, the side walls comprise an inclined section connected with the top wall and a vertical section connected with the inclined section, and the projection of the upper end of the inclined section in a horizontal plane is positioned at the inner side of the projection of the lower end of the inclined section in the horizontal plane.

The side wall of the upper box body is arranged to comprise an inclined section connected with the top wall and a vertical section connected with the inclined section, and the projection of the upper end of the inclined section in the horizontal plane is positioned on the inner side of the projection of the lower end of the inclined section in the horizontal plane. In this way, the inclined section connected with the top wall is arranged in the side wall of the upper box body, and the projection of the upper end of the inclined section in the horizontal plane is positioned at the inner side of the projection of the lower end of the inclined section in the horizontal plane, so that a certain included angle is formed between the top wall and the side wall, a drawing angle is not required to be designed, drawing of a die is convenient when the upper box body is formed, the difficulty of demoulding is reduced, and the demoulding efficiency is improved; meanwhile, due to the arrangement of the inclined section, the occupied space of the upper box body in the width direction is reduced, so that the volume utilization rate and the energy density of the battery system are improved; the vertical section that links to each other with the slope section for go up the box and can cooperate with lower box through vertical section when being connected with lower box, can realize going up the box and being connected with lower box under the condition that does not set up along last box width direction convex flange structure, thereby improve battery system's space utilization in width direction, and then improve battery system's energy density.

Example 1 of battery pack case in the present utility model:

in embodiment 1 of the present embodiment, as shown in fig. 1, a battery pack upper case 100 provided in the present embodiment includes a top wall 1 and side walls 2 connected to left and right ends of the top wall 1, respectively, the two side walls 2 and the top wall 1 are connected to form an n-shaped upper case 100, the side walls 2 include an inclined section 21 connected to the top wall 1 and a vertical section 22 connected to the inclined section 21, and a projection of an upper end of the inclined section 21 in a horizontal plane is located inside a projection of a lower end of the inclined section 21 in the horizontal plane.

In the above embodiment, the inclined section 21 connected to the top wall 1 is provided in the side wall 2 of the upper case 100, and the projection of the upper end of the inclined section 21 in the horizontal plane is located inside the projection of the lower end of the inclined section 21 in the horizontal plane, so that a certain included angle is formed between the top wall 1 and the side wall 2, and thus, a drawing angle is not required to be designed separately, drawing is convenient when the upper case 100 is molded, the difficulty of drawing is reduced, and the efficiency of drawing is improved; meanwhile, the inclined section 21 arranged on the side wall 2 reduces the space occupation of the upper box 100 in the width direction, thereby improving the volume utilization rate and the energy density of the battery system; the vertical section 22 connected with the inclined section 21 enables the upper box 100 to be connected with the corresponding part of the lower box in a matched manner through the vertical section 22 when being connected with the lower box, and the connection between the upper box 100 and the lower box can be realized under the condition that a flange structure protruding along the width direction of the upper box 100 is not arranged, so that the space utilization rate of the battery system in the width direction is improved, and the energy density of the battery system is further improved.

In this embodiment, the top wall 1 and the side wall 2 are integrally formed, and the specific forming mode may be any one of injection molding, plastic suction, mold pressing or die cutting. The integrally formed structure improves the structural strength of the upper case 100, simplifies the manufacturing steps of the upper case 100, and improves the manufacturing efficiency of the upper case 100. Of course, in other embodiments, the top wall 1 and the side wall 2 may be a separate structure, and the top wall 1 and the side wall 2 may be connected to each other by welding or bonding.

In this embodiment, one end of the side wall 2 is connected to the top wall 1, and the other end is connected to the corresponding portion of the lower case. Specifically, one end of the inclined section 21 of the side wall 2 is connected to the top wall 1, the other end is connected to one end of the vertical section 22, and the other end of the vertical section 22 is connected to the corresponding portion of the lower case. In particular, the end of the vertical section 22 of the side wall 2 remote from the top wall 1 is directly or indirectly coupled with the lower box. It will be appreciated that the end of the vertical section 22 of the side wall 2 remote from the top wall 1 is directly in mating connection with the lower box, or that the end of the vertical section 22 of the side wall 2 remote from the top wall 1 is indirectly in mating connection with the lower box via an intermediate connection. In this way, the connection of the upper case 100 and the lower case is achieved by connecting one end of the vertical section 22 of the sidewall 2 with the corresponding portion of the lower case, so that the connection of the upper case 100 and the lower case is achieved without providing a flange structure protruding in the width direction of the upper case 100, thereby improving the space utilization and energy density of the battery system.

The vertical section 22 is provided with the second through hole 222 that runs through the lateral wall 2 far away from the one end of roof 1, and the quantity of second through hole 222 can be a plurality of, and a plurality of second through holes 222 are along the extending direction interval setting of lateral wall 2, and the fastener passes second through hole 222 and connects in lower box. In this way, the side wall 2 is effectively connected with the lower box body through the fastener, so that the connection between the side wall 2 and the lower box body has higher stability, and good tightness between the side wall 2 and the lower box body is ensured; meanwhile, the second through holes 222 formed in the side wall 2 are connected with the lower box body in a matched mode, the size occupation space in the width direction of the battery box body is effectively reduced, and therefore the volume utilization rate and the energy density of the battery system are effectively improved.

The fastening means may be a bolt, screw or rivet connection, and in other embodiments the side wall 2 may be adhesively connected to the lower housing. The side wall 2 and the lower case are connected through the fastener, so that the connection stability of the side wall 2 and the lower case of the upper case 100 can be ensured, and the structural stability of the battery case can be ensured.

In the present embodiment, the acute angle between the plane of the inclined section 21 and the plane of the vertical section 22 is greater than 0 ° and less than or equal to 3 °. Specifically, the acute included angle between the plane of the inclined section 21 and the plane of the vertical section 22 is 1 °; in other embodiments, the acute included angle between the plane of the inclined section 21 and the plane of the vertical section 22 may be 0.5 °, 0.7 °, 1.2 °, 1.5 °, 2 °, 2.5 °, 3 °, which is specifically determined according to comprehensive selection of the specification, the material, etc. of the upper case 100, which is not limited thereto.

In the above embodiment, the included angle between the inclined section 21 and the vertical section 22 of the side wall 2 directly provides the draft angle during compression molding of the upper case 100, and the draft angle is not required to be designed separately, so that the upper case 100 is convenient to draft during molding; the inclination angle of the inclined section 21 can not affect the assembly of the battery, and meanwhile, the installation size of the battery box body in the width direction can be saved, so that the volume utilization rate and the energy density of the battery system are improved.

In the present embodiment, a stepped structure is provided between the inclined section 21 and the vertical section 22. Specifically, the projections of the upper and lower ends of the inclined section 21 in the horizontal plane are located inside the projection of the lower end of the vertical section 22 in the horizontal plane. In this way, the tensile strength of the side wall 2 can be enhanced by the stepped structure provided between the inclined section 21 and the vertical section 22, and the overall structural strength of the upper case 100 can be improved. In other embodiments, no stepped structure may be provided between the inclined section 21 and the vertical section 22, i.e. the lower end of the inclined section 21 is directly connected to the upper end of the vertical section 22.

In embodiment 2 of the present embodiment, an object is to provide a different sidewall structure. On the basis of the specific implementation 1 of the embodiment, specifically, the side wall 2 includes an inclined section 21 connected with the top wall 1 and a vertical section 22 connected with the inclined section 21, the inclined section 21 occupies a larger height in the side wall 2, the vertical section 22 is a flange edge matched with a corresponding part of the lower box body and the flange edge formed by the vertical section 22 is provided with a second through hole 222, and a fastener penetrates through the second through hole 222 to be connected with the lower box body. In this way, the space occupied in the width direction of the upper case 100 can be further reduced, thereby improving the space utilization and energy density of the battery case. Of course, in other embodiments, the inclined sections 21 may be provided in a stepped structure to enhance the tensile strength of the side wall 2, thereby improving the overall structural strength of the upper case 100.

Example 2 of the battery pack case in the present utility model:

as shown in fig. 2 and 3, in embodiment 1 of the present embodiment, the purpose of the present embodiment is to provide a specific structure of the flange side of the upper case. The specific structure of the side wall 2 corresponds to that of the side wall in embodiment 1 and will not be described in detail here.

In this embodiment, the front and rear ends of the upper case 100 have flange sides for mating connection with the lower case, the flange sides including a vertical flange side 221 connected with the vertical section 22, an inclined flange side 211 connected with the inclined section 21, a horizontal flange side 11 connected with the top wall 1, and a transition flange side 12 connecting the horizontal flange side 11 and the inclined flange side 211.

In the above embodiment, the horizontal flange 11 and the vertical flange 221 are smoothly transited through the transition flange 12 and the inclined flange 211 which are sequentially connected, so that a good sealing surface can be formed between the flange and the lower case, thereby improving the sealability of the battery; meanwhile, the flange edges are arranged on the multi-section surfaces, so that the structural strength of the flange edges is improved; the two ends of the upper box body 100 with the opening 3 are connected with the lower box body in a matched manner through flange edges, so that the connection stability and reliability between the upper box body 100 and the lower box body can be improved; the vertical flange edge 221 is connected with the corresponding part of the lower box body to realize the matching connection of the upper box body 100 and the lower box body, and a flange structure protruding in the width direction of the upper box body is not required to be arranged, so that the size of the width direction of the battery box body is reduced, and the volume utilization rate and the energy density of the battery are effectively improved.

In this embodiment, the mating connection between the flange and the corresponding portion of the lower housing is a face-to-face connection. In this way, the connection sealability and stability between the upper case 100 and the lower case can be improved.

It should be understood that the vertical flange 221 is a portion of the vertical section 22 of the sidewall 2 at both ends thereof for mating connection of the sidewall 2 with the corresponding surface of the lower case, and the vertical flange 221 is integrally formed with the vertical section 22 and has a flush surface; the inclined flange 211 is a portion of the inclined section 21 of the side wall 2 at both ends thereof for mating connection of the side wall 2 with the corresponding surface of the lower case, and the inclined flange 211 is integrally formed with the inclined section 21 and has a flush surface. In other embodiments, the vertical flange 221 and the vertical section 22 are in a split structure, and the vertical flange 221 is connected to the vertical section 22 by welding or bonding; the inclined flange 211 is formed separately from the inclined section 21, and the inclined flange 211 is connected to the inclined section 21 by welding or bonding.

In this embodiment, the flange is provided with the first through holes 111 penetrating the flange, and the number of the first through holes 111 is plural, and the plural first through holes 111 are arranged at intervals along the flange. The fastener passes through the first through hole 111 and connects on the lower box, like this, will go up box 100 and lower box effective connection through the fastener for the connection between roof 1 and lateral wall 2 and the lower box has better stability, and has guaranteed to have good leakproofness between upper box 100 and the lower box.

In this embodiment, the transition flange side 12 includes a first transition arc surface 121 connected to the horizontal flange side 11, a second transition arc surface 123 connected to the inclined flange side 211, and a transition slope surface 122 connecting the first transition arc surface 121 and the second transition arc surface 123.

In the above embodiment, the first transition cambered surface 121, the transition inclined surface 122 and the second transition cambered surface 123 are sequentially connected, so that smooth transition between the horizontal flange edge 11 and the inclined flange edge 211 can be ensured, and the structural strength of the transition flange edge 12 can be improved; the flange edge can be matched with the lower box body more tightly at the transitional flange edge 12 to form good sealing, so that the tightness of the battery box body is improved.

In the present embodiment, the transition slope 122 is provided with a first through hole 111 for threading the fastener. In this way, the first through hole 111 is disposed on the transition slope 122, which is more convenient for processing.

In the present embodiment, a transition spherical surface 13 is connected between the transition flange edge 12 and the top wall 1 and the side wall 2.

In the above embodiment, the transition spherical surface 13 is connected between the transition flange edge 12 and the top wall 1 and the side wall 2, so that the side wall 2 and the top wall 1 of the upper box 100 can be ensured to be smoothly and naturally transited in the forming process of the upper box 100, dead angles in areas difficult to form do not exist, and the defect of stress concentration at the junction position of the side wall 2 and the top wall 1 can be greatly reduced.

In this embodiment, the horizontal flange 11 is below the upper surface of the top wall 1.

In the above embodiment, since the horizontal flange 11 is lower than the upper surface of the top wall 1, when the horizontal flange 11 is matched with the battery lower case by using the fastener, the top of the fastener is not higher than the upper surface of the top wall 1, so that the space utilization rate of the battery pack case in the height direction can be effectively improved, and the volumetric energy density of the battery can be further improved.

In embodiment 2 of the present embodiment, an objective is to provide a different flange edge structure. Specifically, the transition flange edge 12 may be a single cambered surface or a single inclined surface. In this way, the structure of the transition flange 12 is simplified, and the processing efficiency of the transition flange 12 is improved.

The other undescribed flange edge structure is the same as that in embodiment 1 of this embodiment, and will not be described in detail here.

In embodiment 3 of the present embodiment, another connection structure between the transition flange edge and the side wall and the top wall is provided. Specifically, the transition flange edge 12 is connected with the top wall 1 and the side wall 2 through an arc surface or an inclined surface. In this way, the connection of the transition flange 12 to the top wall 1 and the side wall 2 can be simplified, and the machining efficiency can be improved.

The other undescribed flange edge structure is the same as that in embodiment mode 1 or 2 of the present embodiment, and will not be described in detail here.

In embodiment 4 of this example, a different form of horizontal flange edge is provided. Specifically, the horizontal flange 11 is flush with the upper surface of the top wall 1. Thus, the processing method of the horizontal flange 11 can be simplified, and the processing efficiency of the upper case 100 can be improved.

The other undescribed flange edge structure is the same as that in embodiment mode 1, 2 or 3 of the present embodiment, and will not be described in detail here.

Embodiments of the battery case in the present utility model:

in a specific implementation of this embodiment, the battery case includes a lower case and a battery pack upper case 100.

In this embodiment, the lower case and the battery pack upper case 100 are connected to each other to enclose an accommodating space for assembling a battery, and specifically, the side wall 2 of the upper case 100 is connected to the lower case in a mating manner, thereby realizing the connection of the upper case 100 and the lower case. Thus, the connection of the upper case 100 and the lower case can be achieved without providing a flange structure protruding in the width direction of the case, thereby improving the space utilization of the battery case in the width direction and further improving the volumetric energy density of the battery.

The structure of the upper case 100 for the battery pack is the same as that of the embodiments 1 to 2 of the upper case for the battery pack of the present utility model, and will not be described in detail.

Embodiments of the battery pack in the present utility model:

in a specific implementation of this embodiment, the battery pack includes a battery and a battery case for accommodating the battery, and the battery case includes a lower case and a battery pack upper case 100.

In this embodiment, the lower case and the battery pack upper case 100 are connected to each other to define a housing space, and the battery is disposed in the housing space.

In this embodiment, the structure of the upper case 100 for a battery pack is identical to examples 1 to 2 of the upper case for a battery pack in the present utility model, and will not be described in detail.

The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a box on battery package, includes the roof with connect respectively in the lateral wall at both ends about the roof, two the lateral wall with the roof links to each other and forms box on the n-shaped, its characterized in that: the side wall comprises an inclined section connected with the top wall and a vertical section connected with the inclined section, and the projection of the upper end of the inclined section in the horizontal plane is positioned on the inner side of the projection of the lower end of the inclined section in the horizontal plane.

2. The battery pack case according to claim 1, wherein: the acute angle included angle between the plane of the inclined section and the plane of the vertical section is more than 0 degree and less than or equal to 3 degrees.

3. The battery pack case according to claim 1 or 2, wherein: the front end and the rear end of the upper box body are provided with flange edges which are used for being matched and connected with the lower box body, and the flange edges comprise vertical flange edges connected with the vertical sections, inclined flange edges connected with the inclined sections, horizontal flange edges connected with the top wall and transition flange edges connected with the horizontal flange edges and the inclined flange edges.

4. A battery pack case according to claim 3, wherein: the transition flange edge comprises a first transition cambered surface connected with the horizontal flange edge, a second transition cambered surface connected with the inclined flange edge and a transition inclined surface connected with the first transition cambered surface and the second transition cambered surface.

5. The battery pack case according to claim 4, wherein: the transition inclined plane is provided with a through hole for penetrating the fastener.

6. A battery pack case according to claim 3, wherein: and a transition spherical surface is connected between the transition flange edge and the top wall and the side wall.

7. A battery pack case according to claim 3, wherein: the horizontal flange edge is below the upper surface of the top wall.

8. The battery pack case according to claim 1 or 2, wherein: a ladder structure is arranged between the inclined section and the vertical section.

9. The utility model provides a battery box, includes box and battery package box on lower box, its characterized in that: the battery pack upper case is the battery pack upper case according to any one of claims 1 to 8.

10. The utility model provides a battery package, includes the battery and is used for holding the battery box of battery, and the battery box includes box and battery package box, its characterized in that down: the battery pack upper case is the battery pack upper case according to any one of claims 1 to 8.