Battery box body and battery pack

Abstract

The utility model discloses a battery box body and a battery pack. The battery box body comprises a box body, a box cover and a shell cover assembly, a battery compartment is formed in the box body and is used for assembling battery units of the battery pack; the box cover is connected with the box body and covers the battery compartment; the shell cover assembly is connected with the side, away from the battery bin, of the box cover, an electrical bin is formed in the shell cover assembly and used for assembling an electrical unit of the battery pack, and an opening communicated with the battery bin and the electrical bin is formed in the area, corresponding to the electrical bin, of the box cover. One side of the box cover is connected with the box body to form the battery bin, the other side of the box cover is connected with the shell cover assembly to form the electrical bin, the battery units are arranged in the length direction and the width direction of the battery box body, and the electrical units and the battery units are arranged in the thickness direction of the battery box body. Therefore, the electrical unit does not occupy the mounting space of the battery unit, and more battery units can be mounted in the battery box body under the same volume, so that the energy density of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery box and a battery pack. Background Art

[0002] As fossil fuels continue to deplete, new energy sources are gradually being promoted. Batteries are a key component of these new energy sources, and they are particularly popular in electric vehicles. As electric vehicles gain popularity, range anxiety is increasingly being discussed. Therefore, improving energy density to extend the range of electric vehicles is a pressing issue. Utility Model Content

[0003] One purpose of the present invention is to provide a battery box and a battery pack, which are intended to solve the technical problem of low energy density of the battery pack.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a solution: a battery box, which includes a box body, a box cover and a shell cover assembly; the box body is provided with a battery compartment, which is used to assemble the battery cells of the battery pack; the box cover is connected to the box body and covers the battery compartment; the shell cover assembly is connected to the side of the box cover away from the battery compartment, and the shell cover assembly forms an electrical compartment, which is used to assemble the electrical units of the battery pack, and the box cover has an opening connecting the battery compartment and the electrical compartment in the area corresponding to the electrical compartment.

[0005] Optionally, the box cover protrudes toward the electrical compartment to form a boss, and the boss is used to support the electrical unit.

[0006] Optionally, a plurality of parallel and spaced elongated grooves are formed on the boss; or a plurality of spaced spherical grooves are formed on the boss.

[0007] Optionally, the battery box further includes a plurality of load-bearing beams, which are arranged on the bosses and are respectively connected to the shell cover assemblies.

[0008] Optionally, the shell cover assembly includes a surrounding frame and a top cover, the surrounding frame is connected to the box cover, an assembly opening is opened at one end of the surrounding frame away from the box cover, and the top cover is connected to the surrounding frame and covers the sealing opening.

[0009] Optionally, the shell cover assembly further includes a panel and a connector, the panel is provided with a socket, the connector is assembled in the socket, the top cover is provided with a skylight connected to the electrical compartment, the panel and the top cover are connected and cover the skylight.

[0010] Optionally, the shell cover assembly further includes a first sealing ring, the surrounding frame and the box cover are welded and sealed, and the top cover and the surrounding frame are sealed via the first sealing ring.

[0011] Optionally, the shell cover assembly further includes a second sealing ring and a third sealing ring, the panel and the top cover are sealed connected via the second sealing ring, and the box cover and the box body are sealed connected via the third sealing ring.

[0012] Optionally, the battery box further comprises a plurality of reinforcing beams connected to the box, the plurality of reinforcing beams being spaced apart and arranged in parallel along the length direction of the box, and battery cells are assembled between adjacent reinforcing beams.

[0013] To achieve the above-mentioned purpose, the present invention provides a solution: a battery pack, which includes: a battery cell, an electrical unit and a battery box as described above, the battery cell is assembled in the battery compartment of the battery box, the electrical unit is assembled in the electrical compartment of the battery box, and the battery cell and the electrical unit are electrically connected through an opening.

[0014] The beneficial effects of the present invention are:

[0015] One side of the box cover connects to the box body and forms a battery compartment. The other side of the box cover connects to the shell cover assembly and forms an electrical compartment. The battery compartment is used to install battery cells, which are arranged along the length and width of the battery box. The electrical compartment is used to install electrical units, which are arranged along the thickness of the battery box. This way, the electrical units do not occupy the installation space of the battery units. Under the same volume, the battery box can accommodate more battery cells, thereby improving the energy density of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the assembly structure of the battery pack provided by an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the exploded structure of the battery pack provided by an embodiment of the present utility model;

[0019] Figure 3 is a schematic cross-sectional view of a battery pack provided by an embodiment of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of a box cover provided by an embodiment of the present utility model;

[0021] Figure 5 It is a schematic diagram of the internal structure of the battery pack provided by an embodiment of the present utility model.

[0022] Description of the reference numerals: battery unit 300, electrical unit 200, battery box 100, box 10;

[0023] Battery compartment 101, box cover 20, opening 201, boss 21, shell cover assembly 30, electrical compartment 301;

[0024] Frame 31, assembly port 312, top cover 32, skylight 321, panel 33, socket 332;

[0025] Joint 34 , first sealing ring 35 , second sealing ring 36 , third sealing ring 37 , load-bearing beam 40 ; and reinforcement beam 50 . DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1 to 4 As shown, Figure 1 This is a schematic diagram of the assembly structure of the battery pack provided by the embodiment of the utility model. Figure 2 This is a schematic diagram of the exploded structure of the battery pack provided by the embodiment of the present utility model. Figure 3 is a cross-sectional schematic diagram of a battery pack provided by an embodiment of the present utility model, Figure 4 It is a structural diagram of the box cover 20 provided in an embodiment of the present utility model.

[0028] The present invention provides a battery pack comprising a battery unit 300, an electrical unit 200, and a battery case 100. The battery case 100 comprises a battery compartment 101 and an electrical compartment 301. The battery case 100 has a thickness direction Z, a length direction X, and a width direction Y that are perpendicular to each other. The length direction and the width direction are the directions in which the battery case 100 extends in a plane, and the thickness direction is the direction in which the battery case 100 becomes thicker as a whole. It can be understood that in this embodiment, the size of the battery box 100 is agreed to decrease in the length direction, width direction, and thickness direction in sequence. The battery compartment 101 and the electrical compartment 301 are arranged at intervals along the thickness direction of the battery box 100. The battery cell 300 is assembled in the battery compartment 101 of the battery box 100. The battery cell 300 is the energy storage unit of the battery pack. The battery cell 300 is composed of multiple single cells. The electrical unit 200 is assembled in the electrical compartment 301 of the battery box 100. The electrical unit 200 is an auxiliary management unit of the battery pack. The electrical unit 200 is mainly used to manage the battery cell 300. The battery cell 300 and the electrical unit 200 are electrically connected through the opening 201.

[0029] The electrical unit 200 includes a battery management system (BMS), a battery disconnect unit (BDU), etc. The battery management system is mainly used to intelligently manage and maintain each battery unit 300, monitor the battery status, and prevent the battery from overcharging and over-discharging to extend the battery life. The main function of the battery disconnect unit is to receive electrical energy from the charging system and then control the speed and torque of the motor through the controller to achieve the driving of the vehicle. At the same time, the battery drive unit also needs to monitor the battery status in real time to ensure the safe operation of the battery.

[0030] Specifically, the battery case 100 includes a case body 10, a case cover 20, and a cover assembly 30. The case body 10 defines a battery compartment 101 for assembling battery cells 300 of the battery pack. The battery cells 300 are connected to the case body 10. The battery compartment 101 can be rectangular, circular, or irregularly shaped. The box cover 20 is connected to the box body 10 and covers the battery compartment 101. The shell cover assembly 30 is connected to the side of the box cover 20 away from the battery compartment 101. The shell cover assembly 30 forms an electrical compartment 301. The electrical compartment 301 and the battery compartment 101 are distributed on opposite sides of the box cover 20. The electrical compartment 301 is used to assemble the electrical unit 200 of the battery pack. The box cover 20 is provided with an opening 201 connecting the battery compartment 101 and the electrical compartment 301 in the area corresponding to the electrical compartment 301. The wires pass through the opening 201 to electrically connect the battery unit 300 and the electrical unit 200, and the pipes pass through the opening 201 to connect the battery unit 300 and the electrical unit 200 together.

[0031] In this embodiment, one side of the box cover 20 is connected to the box body 10 and forms a battery compartment 101. The other side of the box cover 20 is connected to the shell cover assembly 30 and forms an electrical compartment 301. The battery compartment 101 is used to assemble battery cells 300, which are arranged along the length and width of the battery box body 100. The electrical compartment 301 is used to assemble electrical units 200. The electrical units 200 and battery cells 300 are arranged along the thickness of the battery box body 100. In this way, the electrical units 200 do not occupy the installation space of the battery cells 300. Under the same volume, the battery box body 100 can accommodate more battery cells 300, thereby improving the energy density of the battery pack.

[0032] In some embodiments, the cover 20 protrudes toward the electrical compartment 301 to form a boss 21, which is used to support the electrical unit 200. The boss 21 is concentrated in the area of the cover 20 corresponding to the electrical compartment 301. The boss 21 is higher than other areas of the cover 20, so the top surface of the boss 21 is farther from the battery unit 300. When the electrical unit 200 is mounted on the top surface of the boss 21, it can be farther away from the battery unit 300 than when mounted in other areas of the cover 20. The boss 21 creates a buffer space, preventing the electrical unit 200 from deforming the cover 20 and damaging the battery unit 300. Furthermore, the boss 21, as a protruding area of the cover 20, acts as a reinforcing rib, locally increasing the strength of the cover 20 and preventing deformation of the cover 20 by the electrical unit 200. Again, a buffer space is formed between the top surface of the boss 21 and the battery unit 300 . When screwing the electrical unit 200 onto the boss 21 , sufficient safety space is left to prevent the screws from damaging the battery unit 300 .

[0033] The boss 21 can be formed on the box cover 20 by stamping without changing the thickness of the box cover 20. In this case, the boss 21 is hollow. Alternatively, the boss 21 can be formed on the box cover 20 by welding or die-casting to change the thickness of the box cover 20. In this case, the boss 21 is solid.

[0034] In some embodiments, a plurality of parallel and spaced elongated grooves are formed on the boss 21. The elongated grooves may extend along the length direction of the boss 21 and then be spaced apart from each other along the width direction of the boss 21. The elongated grooves may also extend along the width direction of the boss 21 and then be spaced apart from each other along the length direction of the boss 21. The cross-sectional shape of the elongated grooves may be V-shaped, the cross-sectional shape of the elongated grooves may also be U-shaped, or the cross-sectional shape of the elongated grooves may also be arc-shaped. The elongated grooves form a channel on the boss 21, so that after the electrical unit 200 is installed on the boss 21, air can directly contact the electrical unit 200 and carry away heat along the elongated grooves. In addition, the plurality of elongated grooves act as reinforcing ribs on the boss 21, thereby further strengthening the structural strength of the boss 21.

[0035] In some embodiments, the boss 21 is formed with a plurality of spaced spherical grooves. The spherical grooves are structures formed by local depressions on the boss 21. The plurality of spherical grooves can be arranged in a rectangular shape, a circular shape, or other regular or irregular shapes. The cross-sectional shape of the spherical grooves can be V-shaped, U-shaped, or arc-shaped. The plurality of spherical grooves act as reinforcing ribs on the boss 21, thereby further strengthening the structural strength of the boss 21.

[0036] In some embodiments, the battery case 100 further includes a plurality of load-bearing beams 40, which are arranged on the boss 21 and are respectively connected to the shell cover assembly 30. The plurality of load-bearing beams 40 can be arranged parallel to each other, or they can be arranged crosswise. The plurality of load-bearing beams 40 can also be arranged in a network structure with some of the load-bearing beams 40 arranged parallel to each other and some of the load-bearing beams 40 arranged crosswise. The load-bearing beams 40 are connected across the boss 21 and the shell cover assembly 30, thereby sharing the weight they bear with the shell cover assembly 30. For example, a heavier battery drive unit can be placed on multiple load-bearing beams 40, and the multiple load-bearing beams 40 transfer part of the weight of the battery drive unit to the shell cover assembly 30, so that the boss 21 and the shell cover assembly 30 jointly bear the weight of the battery drive unit to share the pressure borne by the boss 21 and prevent the boss 21 from deforming. The load-bearing beams 40 can be sheet metal bending parts, or they can be injection molded plastic parts.

[0037] Specifically, the housing cover assembly 30 includes a frame 31 and a top cover 32. The frame 31 is connected to the box cover 20. An assembly opening 312 is provided at one end of the frame 31 away from the box cover 20. The top cover 32 is connected to the frame 31 and covers the assembly opening 312. The frame 31 and the box cover 20 can be connected by welding, bonding, or other methods that do not require inserting sharp objects into the battery compartment 101. The frame 31 is set behind the box cover 20 and is arranged on the box cover 20 to form a part of the electrical compartment 301. The frame 31 acts as a blocking and limiting function. When the electrical unit 200 is installed into the frame 31 from the assembly opening 312, the frame 31 can prevent the electrical unit 200 from deviating from its original position, thereby facilitating the subsequent installation of the electrical unit 200. After the electrical unit 200 is installed, the top cover 32 is installed on the frame 31 to enclose the assembly opening 312 to form a complete electrical compartment 301.

[0038] Furthermore, dividing the housing cover assembly 30 into a frame 31 and a top cover 32 facilitates the selection of different materials and manufacturing processes according to different functions. For example, the frame 31 needs to function as a stop, requiring relatively high strength, so the material of the frame 31 can be selected from iron, aluminum, or an alloy. The top cover 32 needs to function as a shield, requiring less strength, so the material of the top cover 32 can be selected from plastic materials such as PC, PMMA, PA, PS, etc. It is even possible to make the top cover 32 from a transparent material to facilitate viewing the operating status of the electrical compartment 301.

[0039] Furthermore, the housing cover assembly 30 also includes a panel 33 and a connector 34. The panel 33 has a socket 332, and the connector 34 is assembled in the socket 332. The top cover 32 has a skylight 321 that communicates with the electrical compartment 301. The panel 33 and the top cover 32 are connected and cover the skylight 321. The top cover 32 is located on the side of the frame 31 away from the box cover 20. The panel 33 and the top cover 32 are connected. The panel 33 is also located on the side of the frame 31 away from the box cover 20. Therefore, the socket 332 on the panel 33 is oriented in the thickness direction of the battery case 100, and the plug can also be oriented in the thickness direction of the battery case 100, thereby facilitating docking with the external connector 34. In addition, in this embodiment, the connectors 34 are concentrated on the panel 33 to facilitate centralized management and maintenance. The connectors 34 include water pipe connectors 34, connector connectors 34, etc.

[0040] The housing cover assembly 30 further includes a first sealing ring 35. The surrounding frame 31 and the housing cover 20 are connected by welding and sealing. The welding method can ensure that the gap between the surrounding frame 31 and the housing cover 20 is filled, thus ensuring the sealing of the connection. The top cover 32 and the surrounding frame 31 are hermetically connected through the first sealing ring 35. The first sealing ring 35 can be arranged between the top cover 32 and the surrounding frame 31. The top cover 32 presses the first sealing ring 35 against the surrounding frame 31, and then the surrounding frame 31 is connected by means of rivets or screws. The first sealing ring 35 can also be arranged on the side of the top cover 32 away from the surrounding frame 31. The first sealing ring 35 is placed on the top cover 32, and then the surrounding frame 31 is connected by means of rivets or screws. The first sealing ring 35 can be made of silica gel or foam material.

[0041] The housing cover assembly 30 further includes a second sealing ring 36 and a third sealing ring 37. The panel 33 and the top cover 32 are hermetically connected through the second sealing ring 36. The housing cover 20 and the housing body 10 are hermetically connected through the third sealing ring 37. The second sealing ring 36 can be arranged between the panel 33 and the top cover 32. The panel 33 presses the second sealing ring 36 against the top cover 32, and then the top cover 32 is connected by means of rivets or screws. The second sealing ring 36 can also be arranged on the side of the panel 33 away from the top cover 32. The second sealing ring 36 is placed on the panel 33, and then the top cover 32 is connected by means of rivets or screws. The third sealing ring 37 can be arranged between the housing cover 20 and the housing body 10. The housing cover 20 presses the third sealing ring 37 against the housing body 10, and then the housing body 10 is connected by means of rivets or screws. The third sealing ring 37 can also be arranged on the side of the housing cover 20 away from the housing body 10. The third sealing ring 37 is placed on the housing cover 20, and then the housing body 10 is connected by means of rivets or screws. The second sealing ring 36 can be made of silica gel or foam material. The third sealing ring 37 can be made of silica gel or foam material.

[0042] Please refer to Figure 3 and Figure 5 as shown in Figure 5 which is a schematic diagram of the internal structure of the battery pack provided by the embodiment of the present invention.

[0043] The battery housing 100 further includes a plurality of reinforcing beams 50 connected to the housing 10. The plurality of reinforcing beams 50 are arranged at intervals and in parallel along the length direction of the housing 10. The space between adjacent reinforcing beams 50 is used to assemble the battery cells 300. The reinforcing beams 50 are connected to opposite sides of the housing 10, strengthening the structural strength of the housing 10 as a whole and preventing deformation. The plurality of reinforcing beams 50 divide the battery compartment 101 into a shape like the Chinese character 'ri' (日). Compared with the 'tian' (田) - shaped structure, in this embodiment, the longitudinal beams perpendicular to the reinforcing beams 50 are omitted, thus saving space for installing the battery cells 300, and further improving the energy density of the battery pack. In addition, after omitting the longitudinal beams, the space of the battery compartment 101 is more optimized, facilitating the arrangement of the battery cells 300.

[0044] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status of the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0046] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery box, characterized in that: include: The box body is provided with a battery compartment, wherein the battery compartment is used to assemble the battery cells of the battery pack; a box cover, connected to the box body and covering the battery compartment; as well as The shell cover assembly is connected to the side of the box cover away from the battery compartment. The shell cover assembly forms an electrical compartment, which is used to assemble the electrical unit of the battery pack. The box cover has an area corresponding to the electrical compartment that is provided with an opening connecting the battery compartment and the electrical compartment.

2. The battery box according to claim 1, characterized in that: The box cover protrudes toward the electrical compartment to form a boss, and the boss is used to carry the electrical unit.

3. The battery box according to claim 2, characterized in that: The boss is formed with a plurality of parallel and spaced long strip grooves; or, the boss is formed with a plurality of spaced spherical grooves.

4. The battery box according to claim 2, characterized in that: The battery box further includes a plurality of load-bearing beams, which are arranged on the bosses and are respectively connected to the shell cover assemblies.

5. The battery box according to claim 1, characterized in that: The shell cover assembly includes a surrounding frame and a top cover. The surrounding frame is connected to the box cover. An assembly opening is opened at one end of the surrounding frame away from the box cover. The top cover is connected to the surrounding frame and covers the assembly opening.

6. The battery box according to claim 5, characterized in that: The shell cover assembly also includes a panel and a connector. The panel is provided with a socket, and the connector is assembled in the socket. The top cover is provided with a skylight connected to the electrical compartment. The panel and the top cover are connected and cover the skylight.

7. The battery box according to claim 5, characterized in that: The shell cover assembly further includes a first sealing ring. The surrounding frame and the box cover are welded and sealed. The top cover and the surrounding frame are sealed via the first sealing ring.

8. The battery box according to claim 6, characterized in that: The shell cover assembly further includes a second sealing ring and a third sealing ring. The panel and the top cover are sealed and connected via the second sealing ring, and the box cover and the box body are sealed and connected via the third sealing ring.

9. The battery box according to claim 1, characterized in that: The battery box further comprises a plurality of reinforcing beams connected to the box, wherein the plurality of reinforcing beams are spaced apart and arranged in parallel along the length direction of the box, and battery cells are assembled between adjacent reinforcing beams.

10. A battery pack, characterized in that: The battery pack includes: a battery cell, an electrical unit and a battery case as described in any one of claims 1 to 9, the battery cell is assembled in the battery compartment of the battery case, the electrical unit is assembled in the electrical compartment of the battery case, and the battery cell and the electrical unit are electrically connected through the opening.

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