Battery box and battery pack

Abstract

According to the battery box and the battery pack, the battery box comprises a box body and a controller cover, the box body comprises a box body and a beam body arranged on the box body, the beam body and the box body define a first cavity used for containing a battery, and the controller cover is connected with the beam body and can define a second cavity used for containing a control module with the beam body; moreover, a mounting opening is formed in the beam body, and the mounting opening is communicated with the first cavity and the second cavity, so that when the battery is arranged in the first cavity and the control module is arranged in the second cavity, the control module can be inserted into the first cavity from the second cavity through the mounting opening; the interaction speed of the control module and the battery in the first cavity can be improved to a certain degree, meanwhile, the controller cover is arranged on the side, away from the first cavity, of the beam body, so that the controller cover and the second cavity are both located on the outer side of the box body, the situation that the controller occupies the space in the first cavity can be avoided, and the service life of the controller is prolonged. And the influence on the energy density of the battery pack is reduced.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a battery box and a battery pack. Background Art

[0002] The domain controller can integrate a series of control units such as battery management unit, vehicle control unit, motor control unit, circuit breaker unit, power distribution unit, power conversion unit, on-board charging unit, etc., which can control the operation of batteries in the battery pack.

[0003] At present, in order to increase the interaction speed between the domain controller and the battery, the domain controller can be integrated inside the battery box of the battery pack so that the domain controller can be directly electrically connected to the battery inside the battery box. However, when the domain controller is set inside the battery box, it usually occupies the internal space of the battery box, resulting in a reduction in the space inside the box for accommodating the battery, thereby affecting the energy density of the battery pack. Utility Model Content

[0004] The embodiments of the present application provide a battery box and a battery pack, which can increase the interaction speed between a controller and a battery while reducing the impact on the energy density of the battery pack.

[0005] In the first aspect, an embodiment of the present application provides a battery box, comprising a box body and a controller cover, the box body comprising a box body and a beam body arranged on the box body, the beam body and the box body enclose a first chamber for accommodating batteries; the controller cover is connected to the beam body and is arranged on a side of the beam body away from the first chamber, the controller cover and the beam body enclose a second chamber for accommodating a control module; an installation port is formed on the beam body, the installation port respectively connecting the first chamber and the second chamber, and the installation port is used for allowing the control module to be inserted from the second chamber to the first chamber.

[0006] In some embodiments, the box body is formed with an opening, and at least a portion of the beam body is embedded in the opening to enclose the box body to form a first chamber.

[0007] In some embodiments, the beam body includes a first beam plate and a second beam plate arranged on one side of the first beam plate along a first direction, the first beam plate is embedded in the opening, the second beam plate is located between the first beam plate and the controller cover, the second beam plate protrudes along the second direction relative to the first beam plate, the controller cover is connected to the beam body along the circumference of the second beam plate, and the first direction is perpendicular to the second direction.

[0008] In some embodiments, the box body may include a first wall portion and a second wall portion, the first wall portion is arranged relative to the beam body, the second wall portion is arranged on the side of the first wall portion facing the beam body, and is arranged around the circumference of the first wall portion, and the second wall portion defines an opening on the side away from the first wall portion.

[0009] In some embodiments, the beam body includes a side wall that fits the inner wall of the opening, and the side wall and the inner wall of the opening are welded to each other.

[0010] In some embodiments, the side wall is formed with a plurality of spot welding positions arranged at circumferential intervals along the inner wall of the opening, and the plurality of spot welding positions are respectively welded to the inner wall of the opening; and / or, the battery box also includes a first sealing ring, which is arranged between the side wall and the inner wall of the opening.

[0011] In some embodiments, the controller cover includes a cover body and an interface component disposed on the cover body. The cover body is connected to the beam body and encloses a second chamber. The interface component is used to connect the control module and external equipment.

[0012] In some embodiments, the cover body includes an end plate and a side plate arranged around the circumference of the end plate. The end plate and the beam body are arranged relatively spaced apart. The side plate is located between the end plate and the beam body and is respectively connected to the end plate and the beam body. The end plate, the side plate and the beam body together enclose a second chamber, and the interface assembly is arranged on the end plate.

[0013] In some embodiments, the thickness H of the beam body satisfies: 40 mm ≤ H ≤ 50 mm.

[0014] In a second aspect, an embodiment of the present application further provides a battery pack, comprising a battery, a control module and a battery box of any of the above, wherein the control module is electrically connected to the battery; the battery is disposed in a first chamber of the battery box, and the control module is disposed in a second chamber of a controller cover.

[0015] The battery box and battery pack provided in the embodiments of the present application, the battery box includes a box body and a controller cover, the box body includes a box body and a beam body arranged on the box body, the beam body and the box body are enclosed to form a first chamber for accommodating batteries, the controller cover is connected to the beam body, and can be enclosed with the beam body to form a second chamber for accommodating a control module, and an installation port is formed on the beam body, the installation port is connected to the first chamber and the second chamber respectively, therefore, when the battery is arranged in the first chamber and the control module is arranged in the second chamber, the control module can be inserted from the second chamber into the first chamber through the installation port to connect with the battery, which can shorten the connection path between the control module and the battery to a certain extent and improve the interaction speed between the control module and the battery in the first chamber, and at the same time, because the controller cover is arranged on the side of the beam body away from the first chamber, the controller cover and the second chamber are both located on the outside of the box body, thereby avoiding the controller occupying the space inside the first chamber and reducing its influence on the energy density of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 is an assembly diagram of a battery box provided in an embodiment of the present application;

[0018] Figure 2 is an exploded view of a battery box provided in some embodiments of the present application;

[0019] Figure 3 is an exploded view of a battery pack provided in some embodiments of the present application;

[0020] Figure 4 is an exploded view of a box provided in some embodiments of the present application;

[0021] Figure 5 is an exploded view of a box provided in some other embodiments;

[0022] Figure 6 It is a schematic diagram of the structure of a controller cover provided in some embodiments of the present application.

[0023] Tag Name

[0024] Box body 10; box body 11; first wall portion 111; second wall portion 112; third wall portion 113; beam body 12; first beam plate 121; second beam plate 122; side wall 123; first chamber 13; installation opening 14; controller cover 20; second chamber 21; cover body 22; end plate 221; side plate 222; interface assembly 23; control module 30; first direction X; second direction Y. DETAILED DESCRIPTION

[0025] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0027] Figure 1 is an assembly diagram of a battery box provided in an embodiment of the present application, Figure 2 is an exploded view of a battery box provided in some embodiments of the present application, Figure 3 is an exploded diagram of a battery pack provided in some embodiments of the present application.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, in the first aspect, an embodiment of the present application provides a battery box, including a box body 10 and a controller cover 20, the box body 10 includes a box body 11 and a beam body 12 arranged on the box body 11, the beam body 12 and the box body 11 enclose a first chamber 13 for accommodating batteries; the controller cover 20 is connected to the beam body 12, and is arranged on a side of the beam body 12 away from the first chamber 13, the controller cover 20 and the beam body 12 enclose a second chamber 21 for accommodating a control module 30; an installation port 14 is formed on the beam body 12, the installation port 14 is connected to the first chamber 13 and the second chamber 21 respectively, and the installation port 14 is used for the control module 30 to be inserted from the second chamber 21 to the first chamber 13.

[0029] Specifically, an opening may be formed on the box body 11, and the beam body 12 may cover the opening so as to enclose the first chamber 13 with the box body 11, or the beam body 12 may be embedded in the opening to enclose the first chamber 13 with the box body 11. In addition, the beam body 12 may be an integrally formed structure with the box body 11, which is not limited in this embodiment. The battery may be arranged in the first chamber 13, and the battery may be protected by the beam body 12 and the box body 11. The controller cover 20 may form a groove. When the controller cover 20 is connected to the beam body 12, the beam body 12 is equivalent to covering the opening of the groove, so as to enclose the second chamber 21 with the controller cover 20. At this time, the controller cover 20 and the beam body 12 are equivalent to forming a controller housing together, and the control module 30 of the controller is arranged in the second chamber 21, and the control module 30 may be protected by the beam body 12 and the controller cover 20.

[0030] In this embodiment, the beam body 12 and the box body 11 can be enclosed to form a first chamber 13 for accommodating batteries, and the controller cover 20 is connected to the beam body 12 and can be enclosed with the beam body 12 to form a second chamber 21 for accommodating the control module 30, so that the interaction speed between the control module 30 and the battery in the first chamber 13 can be improved to a certain extent. At the same time, since the controller cover 20 is arranged on the side of the beam body 12 away from the first chamber 13, the controller cover 20 and the second chamber 21 are both located outside the box body 10, so that the controller can be prevented from occupying the space inside the first chamber 13, reducing its impact on the energy density of the battery pack. In addition, by forming the mounting port 14 on the beam body 12, the control module 30 located in the second chamber 21 can be inserted into the first chamber 13 through the mounting port 14 and electrically connected to the battery in the first chamber 13, which can shorten the connection path between the control module 30 and the battery, further improve the interaction speed between the two, and at the same time reduce the use of connecting components between the control module 30 and the battery, saving costs.

[0031] Optionally, at least one cavity may be formed inside the beam body 12 to reduce the weight of the beam body 12 and reduce the cost of the beam body 12. It is understandable that when there are multiple cavities, the multiple cavities may be spaced apart from each other to ensure the structural strength of the beam body 12.

[0032] In some embodiments, the box body 11 is formed with an opening, and at least a portion of the beam body 12 is embedded in the opening to enclose the box body 11 to form a first chamber 13 .

[0033] In this embodiment, an opening is formed on the box body 11, and at least a portion of the beam body 12 is embedded in the opening to enclose the box body 11 to form a first chamber 13. Compared with setting the beam body 12 to cover the opening formed on the box body 11, the assembly strength between the beam body 12 and the box body 11 can be improved.

[0034] Figure 4 It is an exploded view of a box provided in some embodiments of the present application.

[0035] like Figure 4 As shown, in some embodiments, the beam body 12 includes a first beam plate 121 and a second beam plate 122 arranged on one side of the first beam plate 121 along the first direction X, the first beam plate 121 is embedded in the opening, the second beam plate 122 is located between the first beam plate 121 and the controller cover 20, the second beam plate 122 protrudes relative to the first beam plate 121 along the second direction Y, the controller cover 20 is connected to the beam body 12 along the circumference of the second beam plate 122, and the first direction X is perpendicular to the second direction Y.

[0036] The first direction X may be the thickness H direction of the first beam plate 121 or the second beam plate 122 , and the second direction Y may be the length direction or the width direction of the first beam plate 121 or the second beam plate 122 , which is not limited in this embodiment.

[0037] The first beam plate 121 and the second beam plate 122 can be an integrally formed structure or a split structure. The first beam plate 121 is embedded in the opening, and can be connected to the box body 11 by welding, bolts, and other connection methods, so as to enclose the box body 11 together to form the first chamber 13. The second beam plate 122 is located between the first beam plate 121 and the controller cover 20, and the second beam plate 122 protrudes along the second direction Y relative to the first beam plate 121. Therefore, the area of ​​the projection of the second beam plate 122 on the controller cover 20 along the first direction X is greater than the area of ​​the projection of the first beam plate 121 on the controller cover 20 along the first direction X. When the controller cover 20 is connected to the beam body 12 along the circumference of the second beam plate 122, the connection area between the controller cover 20 and the beam body 12 can be increased, thereby improving the connection strength between the two.

[0038] It can be understood that when the controller cover 20 is connected to the beam body 12 along the circumference of the second beam plate 122, it can be connected to the second beam plate 122 along the circumference of the second beam plate 122. For example, the controller cover 20 can be bonded to the second beam plate 122 by structural adhesive; or, the controller cover 20 can also be connected to the second beam plate 122 and the first beam plate 121 at the same time along the circumference of the second beam plate 122. Exemplarily, the controller cover 20 can include a first part and a second part arranged in sequence along the second direction Y, the first part and part of the second beam plate 122 and the first beam plate 121 are arranged in sequence along the first direction X, and the three can be fastened by bolts along the circumference of the second beam plate 122, and the second part and the remaining part of the second beam plate 122 are arranged in sequence along the first direction X, and the two can also be fastened by bolts along the circumference of the second beam plate 122.

[0039] Please continue to refer to Figure 4In some embodiments, the box body 11 may include a first wall portion 111 and a second wall portion 112. The first wall portion 111 is arranged to be spaced relative to the beam body 12. The second wall portion 112 is arranged on a side of the first wall portion 111 facing the beam body 12, and is arranged around the circumference of the first wall portion 111. The second wall portion 112 defines an opening on a side away from the first wall portion 111.

[0040] Specifically, the second wall portion 112 is located on the side of the first wall portion 111 facing the beam body 12, and is arranged around the circumference of the first wall portion 111. The second wall portion 112 defines an opening on the side away from the first wall portion 111. At this time, the first wall portion 111 and the second wall portion 112 can be equivalent to enclosing a groove, the first wall portion 111 is the bottom wall of the groove, the second wall portion 112 is the side wall 123 of the groove, and the opening defined by the side of the second wall portion 112 away from the first wall portion 111 is the opening of the groove.

[0041] In this embodiment, the first wall portion 111 of the box body 11 is arranged to be spaced relative to the beam body 12, and the second wall portion 112 is arranged on the side of the first wall portion 111 facing the beam body 12, and is arranged around the circumference of the first wall portion 111. The second wall portion 112 defines an opening on the side away from the first wall portion 111. When at least a portion of the beam body 12 is embedded in the opening, the beam body 12 can simultaneously serve as the wall portion of the box body 11 and the controller cover 20. On the one hand, it is enclosed with the first wall portion 111 and the second wall portion 112 to form a first chamber 13, and on the other hand, it is enclosed with the controller cover 20 to form a second chamber 21, thereby reducing the number of components of the battery box and reducing costs.

[0042] Figure 5 1 is an exploded view of a box provided in some other embodiments.

[0043] like Figure 5 As shown, in other embodiments, the box body 11 may also include a first wall portion 111, a second wall portion 112 and a third wall portion 113, the second wall portion 112 is located between the first wall portion 111 and the third wall portion 113, and extends circumferentially around the first wall portion 111 and the third wall portion 113, an opening is formed in the third wall portion 113, and at least a portion of the beam body 12 is embedded in the opening to enclose the first chamber 13 together with the first wall portion 111, the second wall portion 112 and the third wall portion 113.

[0044] Optionally, the second wall portion 112 may include a top plate, a bottom plate, and a first side wall plate and a second side wall plate that are relatively arranged. The top plate, the first side wall plate, the bottom plate and the second side wall plate are arranged in sequence and connected end to end to surround the first wall portion 111 circumferentially.

[0045] Please continue to refer to Figure 4 and Figure 5In some embodiments, the beam body 12 includes a side wall 123 that fits the inner wall of the opening, and the side wall 123 and the inner wall of the opening are welded to each other.

[0046] In this embodiment, when the beam body 12 is embedded in the opening, the side wall 123 of the beam body 12 and the inner wall of the opening are welded to each other, which can improve the connection reliability between the beam body 12 and the box body 11.

[0047] Exemplarily, the side wall 123 of the beam body 12 and the inner wall of the opening may be welded by various welding methods such as laser welding, brazing, friction welding, diffusion welding, etc.

[0048] In some embodiments, the side wall 123 is formed with a plurality of spot welding positions arranged at circumferential intervals along the inner wall of the opening, and the plurality of spot welding positions are respectively welded to the inner wall of the opening, so that the plurality of spot welding positions can be respectively welded to the inner wall of the opening by resistance spot welding. Compared with welding methods such as laser welding, the welding yield between the side wall 123 and the inner wall of the opening can be improved.

[0049] It should be clarified that when the second wall portion 112 defines an opening on a side away from the first wall portion 111 , a plurality of spot welding positions are arranged at intervals along the circumference of the inner wall of the opening, that is, a plurality of spot welding positions are arranged at intervals along the circumference of the first wall portion 111 .

[0050] And / or, the battery box further includes a first sealing ring, which is disposed between the side wall 123 and the inner wall of the opening to improve the sealing between the beam body 12 and the box body 11, thereby improving the sealing performance of the battery box.

[0051] Figure 6 It is a schematic diagram of the structure of a controller cover provided in some embodiments of the present application.

[0052] like Figure 6 As shown, in some embodiments, the controller cover 20 includes a cover body 22 and an interface component 23 disposed on the cover body 22. The cover body 22 is connected to the beam body 12 and encloses a second chamber 21. The interface component 23 is used to connect the control module 30 and external equipment.

[0053] In this embodiment, an interface component 23 is provided on the cover body 22, and the control module 30 and the external device are connected through the interface component 23. The structure is simple and the reliability is high. Moreover, compared with connecting the control module 30 and the external device by passing the cable through the controller cover 20, the sealing performance of the controller cover 20 can be prevented from being affected when the cable passes through the controller cover 20.

[0054] Please continue to refer to Figure 6In some embodiments, the cover body 22 includes an end plate 221 and a side plate 222 arranged around the end plate 221. The end plate 221 and the beam body 12 are relatively spaced apart. The side plate 222 is located between the end plate 221 and the beam body 12, and is respectively connected to the end plate 221 and the beam body 12. The end plate 221, the side plate 222 and the beam body 12 together enclose a second chamber 21, and the interface assembly 23 is arranged on the end plate 221.

[0055] The interface component 23 may include multiple interfaces, and the multiple interfaces may be used to realize a one-to-one electrical connection between multiple external devices and multiple control units in the control module 30 .

[0056] In this embodiment, by setting the interface assembly 23 on the end plate 221, it is possible to avoid the interface occupying the lateral space of the controller cover 20, while at the same time allowing sufficient space on the cover body 22 for setting multiple interfaces in the interface assembly 23.

[0057] It can be understood that when the control module 30 passes through the installation port 14 on the beam body 12 from the second chamber 21 and is inserted into the first chamber 13 to be electrically connected to the battery, by setting the interface component 23 on the end plate 221, at this time, the battery and the interface component 23 are located on opposite sides of the control module 30. When the battery needs to supply power to an external device through the control module 30, the power supply path of the battery can be shortened.

[0058] Optionally, a flange may be formed on one side of the side plate 222 close to the beam body 12 , and the flange extends along the circumference of the beam body 12 and is closely connected to the beam body 12 , thereby increasing the contact area between the side plate 222 and the beam body 12 and improving the reliability of the connection between the two.

[0059] Optionally, the side plate 222 and the end plate 221 may be integrally formed to reduce the number of parts used when assembling the controller cover 20 and reduce costs.

[0060] In some embodiments, the thickness H of the beam body 12 satisfies: 40 mm ≤ H ≤ 50 mm, so that the connection strength between the box body 10 and the controller cover 20 can be improved by reasonably setting the thickness H of the beam body 12 .

[0061] Please continue to refer to Figure 3 In the second aspect, the embodiment of the present application further provides a battery pack, including a battery, a control module 30 and a battery box of any one of the above items, the control module 30 is electrically connected to the battery; the battery is arranged in the first chamber 13 of the battery box, and the control module 30 is arranged in the second chamber 21 of the controller cover 20. The battery pack provided by the embodiment of the present application has the technical effect of the technical solution of the battery box in any of the above embodiments, and the structures identical or corresponding to the above embodiments and the explanation of terms are not repeated here.

[0062] Optionally, the control module 30 may include at least one of a battery management unit, a vehicle control unit, a motor control unit, a circuit breaker unit, a power distribution unit, a power conversion unit and an on-board charging unit, so as to improve the integration of the control module 30.

[0063] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A battery box, characterized in that: include: A box body, comprising a box body and a beam body arranged on the box body, wherein the beam body and the box body are enclosed to form a first chamber for accommodating a battery; A controller cover is connected to the beam body and is disposed on a side of the beam body away from the first chamber, wherein the controller cover and the beam body enclose a second chamber for accommodating a control module; The beam body is formed with an installation opening, the installation opening being connected to the first cavity and the second cavity respectively, and the installation opening being used for the control module to be inserted from the second cavity to the first cavity.

2. The battery box according to claim 1, characterized in that: An opening is formed on the box body, and at least a portion of the beam body is embedded in the opening to enclose the first chamber with the box body.

3. The battery box according to claim 2, characterized in that: The beam body includes a first beam plate and a second beam plate arranged on one side of the first beam plate along a first direction, the first beam plate is embedded in the opening, the second beam plate is located between the first beam plate and the controller cover, the second beam plate protrudes along a second direction relative to the first beam plate, the controller cover is connected to the beam body along the circumference of the second beam plate, and the first direction is perpendicular to the second direction.

4. The battery box according to claim 2, characterized in that: The box body may include a first wall portion and a second wall portion, wherein the first wall portion is arranged to be spaced relative to the beam body, the second wall portion is arranged on a side of the first wall portion facing the beam body and is arranged around the circumference of the first wall portion, and the second wall portion defines the opening on a side away from the first wall portion.

5. The battery box according to claim 2, characterized in that: The beam body comprises a side wall which is in contact with the inner wall of the opening, and the side wall and the inner wall of the opening are welded to each other.

6. The battery box according to claim 5, characterized in that: The side wall is formed with a plurality of spot welding positions spaced apart along the circumference of the inner wall of the opening, and the plurality of spot welding positions are respectively welded to the inner wall of the opening; And / or, the battery box further includes a first sealing ring, wherein the first sealing ring is disposed between the side wall and the inner wall of the opening.

7. The battery box according to any one of claims 1 to 6, characterized in that: The controller cover includes a cover body and an interface component arranged on the cover body. The cover body is connected to the beam body and encloses the second chamber. The interface component is used to connect the control module and external equipment.

8. The battery box according to claim 7, characterized in that: The cover body includes an end plate and a side plate arranged around the circumference of the end plate. The end plate and the beam body are arranged relatively spaced apart. The side plate is located between the end plate and the beam body and is respectively connected to the end plate and the beam body. The end plate, the side plate and the beam body together enclose the second chamber, and the interface assembly is arranged on the end plate.

9. The battery box according to any one of claims 1 to 6, characterized in that: The thickness H of the beam body satisfies: 40mm≤H≤50mm.

10. A battery pack, characterized in that: include: Battery; A control module, electrically connected to the battery; as well as According to the battery box as described in any one of claims 1-9, the battery is arranged in a first chamber of the battery box, and the control module is arranged in a second chamber of the controller cover.

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