Module shell, battery box and battery pack

Abstract

The utility model provides a module shell, a battery box and a battery pack, and relates to the technical field of batteries. The module shell comprises a frame and a plurality of partition plates. The frame comprises a plurality of side plates, and the side plates are sequentially connected end to end to form an enclosure frame structure. The multiple partition plates are sequentially arranged in an inner cavity of the frame at intervals in the first direction so as to divide the inner cavity of the frame into multiple sub-cavities, and the sub-cavities are used for installing battery cells. According to the battery module disclosed by the invention, by arranging the module shell, on one hand, when the battery is impacted, the impact force is dispersed to each side plate and each partition plate through the module shell, so that the structural strength of the battery can be improved, and the impact force on the battery core is reduced; and on the other hand, when the battery cells emit heat, part of heat can be absorbed through the module shell, so that the heat dissipation effect of the battery cells is improved. Therefore, the reliability of the battery can be improved.

Description

Technical Field

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

[0002] In the related art, the battery includes a battery box, a plurality of square shell battery cells stacked in the battery box, and a module end plate assembly that fixes the square shell battery cells. The battery cells are fixed in the box by structural adhesive, and the structural adhesive is mainly located on the side of the battery cells close to the gravity direction. Therefore, the natural heat dissipation path of the battery is the bottom of the battery cell-thermal structural adhesive-box, or the large surface of the battery cell-thermal structural adhesive-box. This results in poor heat dissipation on the side of the battery cell away from the structural adhesive, resulting in a large temperature difference between the side of the battery cell close to the structural adhesive and the side away from the structural adhesive, thereby reducing the reliability of the battery cell.

[0003] In terms of structure, since the cells are stacked one after another, only the two ends of the stacked cells are in contact with the inner wall of the box through the module end plates, so there is no structure around the cells to disperse the impact force. As a result, when the box is impacted, the impact force can directly act on the stacked cells through the box and the module end plates, which can easily damage the cells and reduce the reliability of the cells. Utility Model Content

[0004] The embodiments of the present application provide a module housing, a battery box and a battery pack, which can improve the reliability of the battery.

[0005] In a first aspect, an embodiment of the present application provides a module shell, which includes a frame and a plurality of partitions; the frame includes a plurality of side panels, which are sequentially connected to form a surrounding frame structure; the plurality of partitions are sequentially arranged in an inner cavity of the frame at intervals along a first direction to divide the inner cavity of the frame into a plurality of sub-cavities, which are used to install battery cells.

[0006] In one embodiment, the module housing is applied to a battery box, the inner wall of the battery box is provided with a matching groove, and a matching strip is provided on the side of the side plate facing away from the inner cavity, and the matching strip is configured to match with the matching groove.

[0007] In one embodiment, the frame has a first end face along the axis of the inner cavity of the frame, and the module shell also includes a limiter, there are multiple limiters, and the multiple limiters are arranged on the first end face, and the multiple limiters are configured to cooperate with the battery cells located in the multiple sub-cavities.

[0008] In one embodiment, the sub-cavity is a rectangular cavity, and the limiting member is arranged opposite to the corner of the corresponding sub-cavity.

[0009] In one embodiment, the battery core and the sub-cavity are interference fit.

[0010] In a second aspect, an embodiment of the present application further provides a battery box, which includes a lower box body, a box cover and the aforementioned module shell; the box cover and the lower box body cover each other to define a accommodating cavity; the module shell is disposed in the accommodating cavity.

[0011] In one embodiment, a matching groove is provided on the inner wall of the lower box body, and a matching strip is provided on the side of the side plate facing away from the inner cavity, and the matching strip matches with the matching groove.

[0012] In one embodiment, the lower box body has a first inner wall arranged opposite to the box cover, a plurality of support platforms are arranged on the first inner wall, the plurality of support platforms are configured to support the battery cells, and there is a glue injection space between the support platforms.

[0013] In one embodiment, a reinforcement structure is provided on the outer wall of the battery box.

[0014] In a second aspect, an embodiment of the present application further provides a battery pack, which includes a battery cell and the aforementioned battery box, wherein there are multiple battery cells, and the multiple battery cells are arranged in a one-to-one correspondence with the multiple sub-cavities.

[0015] Beneficial effects of the embodiments of the present application:

[0016] In the embodiment of the present application, by providing the module housing, on the one hand, when the battery is impacted, the impact force is dispersed to each side plate and each partition through the module housing, thereby improving the structural strength of the battery and reducing the impact force on the battery cell; on the other hand, when the battery cell is heated, part of the heat can be absorbed through the module housing, thereby improving the heat dissipation effect of the battery cell. In this way, the reliability of the battery can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic structural diagram of a module housing provided in an embodiment of the present application;

[0019] Figure 2 It is a schematic diagram of the cooperation between the module housing and the battery cell provided in the embodiment of the present application;

[0020] Figure 3 yes Figure 1 The enlarged view of point A in the middle;

[0021] Figure 4 It is a schematic diagram of the assembly of the module housing and the battery cell provided in the embodiment of the present application;

[0022] Figure 5 is a schematic diagram of the structure of a battery box provided in an embodiment of the present application;

[0023] Figure 6 is a top view of the lower box provided in an embodiment of the present application;

[0024] Figure 7 yes Figure 6 Cross-sectional view of the middle BB;

[0025] Figure 8 yes Figure 7 Enlarged view of point C in the middle;

[0026] Fig. 9 is a schematic structural diagram of a lower box provided in an embodiment of the present application;

[0027] Fig.10 It is a schematic diagram of the structure of the battery pack provided in the embodiment of the present application.

[0028] 001-module housing;

[0029] 011-frame; 111-side plate; 1111-matching strip; 112-sub-cavity; 113-first end surface;

[0030] 012-partition;

[0031] 013-Limiting parts;

[0032] 014-ear plate; 141-bolt hole;

[0033] 002-battery box; 021-box cover; 022-lower box body; 221-matching groove; 222-support platform; 223-transverse ribs; 224-longitudinal ribs; 225-support platform; 226-first inner wall; 023-battery cell.

[0034] 003-Battery Pack DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0036] In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In the description of the embodiments of the present application, words such as "example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "example" or "for example" in the embodiments of the present application is not to be interpreted as being more preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to present relative concepts in a clear manner.

[0040] See also Figure 1 , Figure 1 001 according to an embodiment of the present application. The present application provides a module housing 001, which includes a frame 011 and a plurality of partitions 012. The frame 011 includes a plurality of side panels 111. The plurality of side panels 111 are sequentially connected to form a frame structure. The plurality of partitions 012 are sequentially arranged in the inner cavity of the frame 011 at intervals along a first direction to divide the inner cavity of the frame 011 into a plurality of sub-cavities 112. The sub-cavities 112 are used to install battery cells, such as Figure 2 As shown, Figure 2 It is a schematic diagram of the cooperation between the module housing 001 and the battery cell provided in an embodiment of the present application.

[0041] It can be understood that the shape of the battery cell is consistent with the shape of the sub-cavity 112. For example, when the battery cell is a square shell battery cell, the sub-cavity 112 is a rectangular cavity. Correspondingly, the frame 011 is a rectangular frame 011, and the inner cavity is a rectangular inner cavity.

[0042] In addition, the partition 012 is fixed to the side plate 111. Specifically, the partition 012 can be integrally formed with the side plate 111, or can be glued or welded to the side plate 111. The frame 011 can be an integrally formed part or an assembled part. The partition 012 and the side plate 111 can be plastic parts or metal parts. When they are metal parts, an insulating coating can be applied on the surface of the partition 012 and the side plate 111 close to the battery cell to improve the insulation between the module housing 001 and the battery cell.

[0043] In this embodiment, by providing the module housing 001, on the one hand, when the battery is impacted, the impact force is dispersed to each side plate 111 and each partition 012 through the module housing 001, thereby improving the structural strength of the battery and reducing the impact force on the battery cell; on the other hand, when the battery cell is heated, part of the heat can be absorbed through the module housing 001, thereby improving the heat dissipation effect of the battery cell. In this way, the reliability of the battery can be improved.

[0044] In addition, in order to further improve the heat dissipation effect of the battery cell, the side plate 111 and the partition 012 can be thermally coupled with the battery cell and the battery box, and the thermal conductivity of the side plate 111 and the partition 012 is greater than that of air. In this way, on the one hand, the battery cell can dissipate heat all around, thereby reducing the temperature difference of the battery cell and improving the reliability of the battery cell; on the other hand, the heat of the battery cell is transferred to the battery box through the module shell 001, thereby increasing the natural heat dissipation path of the battery and improving the heat dissipation effect of the battery cell. In addition, the frame 011 and the partition 012 can be made of a material with a thermal conductivity greater than that of air. In this way, the heat transfer efficiency between the battery cell and the battery box can be accelerated, thereby improving the heat dissipation effect of the battery cell.

[0045] See also Figure 1 In one embodiment, the module housing 001 is applied to a battery box, a matching groove is provided on the inner wall of the battery box, and a matching strip 1111 is provided on the side of the side panel 111 facing away from the inner cavity, and the matching strip 1111 is configured to match with the matching groove.

[0046] In order to facilitate the insertion of the module housing 001 into the battery box, the extension direction of the matching groove is parallel to the insertion direction between the module housing 001 and the battery box. Specifically, the extension direction of the matching groove is parallel to the inner cavity axis of the frame 011, and a groove port for inserting the matching strip 1111 is provided at one end of the matching groove away from the bottom wall of the battery box.

[0047] It can be understood that the module housing 001 fits the battery cell to conduct the heat of the battery cell, and then conducts the heat of the battery cell to the battery box through the matching strip 1111 and the matching groove, and finally takes the heat away through the air on the surface of the battery box. In addition, in order to improve the heat conduction efficiency, a heat conductive glue is provided between the matching strip 1111 and the matching groove.

[0048] In this embodiment, through the above-mentioned arrangement, on the one hand, the contact area between the module shell 001 and the battery box is increased, thereby improving the thermal conductivity between the module shell 001 and the battery box, and further improving the heat dissipation efficiency of the battery cell; on the other hand, through the insertion of the matching strip 1111 and the matching groove on the battery box, the impact force exerted on the module shell 001 can be dispersed by the matching strip 1111, thereby further improving the structural strength of the battery.

[0049] Specifically, a matching strip 1111 may be provided on the side of each side plate 111 facing away from the battery cell. In this way, when the module housing 001 is subjected to an impact force parallel to the partition 012, that is, Figure 1 The impact force in the Y direction can be dispersed by the matching strips 1111 located at both ends of the partition 012. When the assembly shell is subjected to an impact force perpendicular to the partition 012, that is, Figure 1 The impact force in the X direction can be dispersed by the matching strips 1111 located on both sides of the partition 012. Thus, the structural strength and impact resistance of the battery can be further improved.

[0050] In addition, by providing a mating strip 1111 and a mating groove between the module housing 001 and the battery box, during assembly, the relative position between the module housing 001 and the battery box can be determined based on the mating of the mating strip 1111 and the mating groove, thereby improving the convenience of battery assembly and facilitating rapid assembly of the battery.

[0051] See also Figure 3 , Figure 3 yes Figure 1 In one embodiment, along the axis of the inner cavity of the frame 011, the frame 011 has a first end surface 113. The module housing 001 further includes a stopper 013. There are multiple stoppers 013. Multiple stoppers 013 are disposed on the first end surface 113. Multiple stoppers 013 are configured to cooperate with the battery cells located in multiple subcavities 112.

[0052] It can be understood that the inner cavity of the frame 011 is an open structure at both ends of the axial direction of the frame 011. When the battery cell is installed in the battery box, the side of the module shell 001 away from the first end face 113 faces the bottom wall of the battery box, so that the side of the battery cell away from the first end face 113 is limited by the bottom wall of the battery box.

[0053] Based on this, in this embodiment, by setting a limit piece 013, the side of the battery cell close to the first end face 113 is stopped and cooperated with the limit piece 013, so that the limit piece 013 is combined with the bottom wall of the battery box to fix the battery cell in the sub-cavity 112 to prevent the battery cell from escaping from the sub-cavity 112, thereby improving the position stability of the battery cell and ultimately improving the anti-vibration ability of the battery cell.

[0054] In addition, if Figure 4 As shown, Figure 4 It is a schematic diagram of the assembly of the module shell 001 and the battery cell provided in an embodiment of the present application. When installing the battery cell in the module shell 001, first place multiple battery cells in sequence, and then move the module shell 001 from top to bottom until the module shell 001 is sleeved on the battery cell, thus completing the assembly of the module shell 001 and the battery cell.

[0055] See also Figure 1 In one embodiment, the sub-cavity 112 is a rectangular cavity. The stopper 013 is disposed opposite to the corner of the sub-cavity 112 corresponding thereto.

[0056] Exemplarily, limiting members 013 are disposed at the four corners of the first end surface 113 and the sub-cavity 112 .

[0057] In this embodiment, by arranging the stopper 013 at the corner of the sub-cavity 112, the connection area between the stopper 013 and the side plate 111 and the partition 012 can be increased, thereby improving the reliability of the connection between the stopper 013 and the side plate 111 and the partition 012. If the stopper 013 is arranged at the four corners of the sub-cavity 112, the uniformity of the force on the battery cell can be improved, and the force state of the battery cell can be improved.

[0058] In one embodiment, the battery cell and the sub-cavity 112 are interference fit.

[0059] In this embodiment, by interference fitting the battery cell with the sub-cavity 112, on the one hand, after the battery cell is installed in the sub-cavity 112, there is no need to additionally configure a structure for fastening the battery cell and a pre-tightening process, thereby simplifying the assembly process and improving the battery manufacturing efficiency; on the other hand, the partition 012 and the side plate 111 have an effect of squeezing the battery cell, and a pre-tightening force can be formed around the battery based on the squeezing, thereby improving the position stability of the battery cell installed in the module shell 001 and preventing the battery cell from shaking relative to the module shell 001.

[0060] See also Figure 5 , Figure 5002 is a schematic diagram of a battery box 002 provided in an embodiment of the present application. Accordingly, an embodiment of the present application further provides a battery box 002, which includes a lower box body 022, a box cover 021 and the aforementioned module housing 001. The box cover 021 and the lower box body 022 cover each other to define a receiving cavity. The module housing 001 is disposed in the receiving cavity.

[0061] It can be understood that the module housing 001 is fixed in the battery box. Specifically, the outer surface of the module housing 001 is provided with an ear plate 014, and the ear plate is provided with a bolt through hole 141. The inner wall of the lower box 022 is provided with a support 225. The ear plate 014 fits with the support 225, and the end of the screw of the bolt passes through the bolt through hole 141 and is threadedly connected with the support 225, thereby fixing the module housing 001 in the battery box.

[0062] In this embodiment, by adopting the aforementioned module shell 001, when the battery is impacted, the impact force can be dispersed to the various side panels 111 and the various partitions 012 through the module shell 001, thereby improving the structural strength of the battery box 002 and reducing the impact force on the battery cell, thereby improving the reliability of the battery box 002; and the battery cell can dissipate heat all around, so that the heat of the battery cell is transferred to the battery box 002 through the module shell 001, thereby increasing the natural heat dissipation path of the battery box 002, thereby improving the heat dissipation effect of the battery cell, and reducing the temperature difference of the battery cell, thereby improving the reliability of the battery box 002.

[0063] See also Figure 5 In one embodiment, a matching groove 221 is provided on the inner wall of the lower box body 022 , and a matching strip 1111 is provided on the side of the side plate 111 facing away from the inner cavity, and the matching strip 1111 matches with the matching groove 221 .

[0064] In this embodiment, through the above-mentioned arrangement, on the one hand, the contact area between the module shell 001 and the battery box 002 is increased, thereby improving the thermal conductivity between the module shell 001 and the battery box 002, and further improving the heat dissipation efficiency of the battery cell; on the other hand, through the insertion of the matching strip 1111 and the matching groove on the battery box 002, the impact force exerted on the module shell 001 can be dispersed by the matching strip 1111, thereby further improving the structural strength of the battery box 002.

[0065] In addition, by setting a matching strip 1111 and a matching groove between the module shell 001 and the battery box 002, during assembly, the relative position between the module shell 001 and the battery box can be determined based on the matching of the matching strip 1111 and the matching groove, thereby improving the convenience of battery assembly and facilitating rapid assembly of the battery.

[0066] See also Figures 6 to 8 , Figure 6is a top view of the lower box 022 provided in an embodiment of the present application, Figure 7 yes Figure 6 The cross-sectional view of BB, Figure 8 yes Figure 7 In one embodiment, the lower box body 022 has a first inner wall 226 disposed opposite to the box cover 021, and a plurality of support platforms 222 are disposed on the first inner wall 226. The plurality of support platforms 222 are configured to support the battery cells. There is a glue injection space between the support platforms 222.

[0067] It is understandable that the glue injection space is used to fill glue, such as structural glue, to glue the battery cell, the first inner wall 226 and the support platform 222 together, thereby fixing the battery cell in the battery box 002 and improving the stability of the battery cell in the battery box 002.

[0068] In addition, the matching groove 221 is provided on the inner wall of the lower box body 022 opposite to the side plate 111 .

[0069] In order to improve the position stability of the battery cell relative to the battery box, structural glue is usually filled between the bottom of the battery cell and the first inner wall 226, so that the battery cell is glued to the battery box through the structural glue. In order to dissipate heat, the structural glue is usually selected to have good thermal conductivity, so that the heat of the battery cell can be quickly transferred to the battery box 002 through the structural glue.

[0070] In this embodiment, by providing a support platform 222, a gap is created between the bottom of the battery cell and the first inner wall 226, so that the structural adhesive can flow smoothly at the bottom of the battery cell, thereby allowing the structural adhesive to be filled evenly, and ultimately improving the reliability of the bonding between the battery cell and the battery box 002.

[0071] See also Fig. 9 , Fig. 9 002 is a schematic diagram of the structure of the lower box body 022 provided in an embodiment of the present application. In one embodiment, a reinforcement structure is provided on the outer wall of the battery box 002.

[0072] Exemplarily, the reinforcement structure includes a plurality of transverse ribs 223 and a plurality of longitudinal ribs 224 , and the plurality of transverse ribs 223 and the plurality of longitudinal ribs 224 are alternately arranged on the outer wall of the battery box.

[0073] In this embodiment, by providing a reinforcement structure on the outer wall of the battery box 002 , the structural strength of the battery box can be improved, thereby improving the impact resistance of the battery box 002 .

[0074] See also Fig.10 , Fig.10003 is a schematic diagram of the structure of the battery pack 003 provided in the embodiment of the present application. The embodiment of the present application also provides a battery pack 003, which includes a battery cell 023 and the aforementioned battery box 002. There are multiple battery cells 023, and the multiple battery cells 023 are arranged in a one-to-one correspondence with the multiple sub-cavities 112.

[0075] In this embodiment, by adopting the aforementioned battery box 002, when the battery pack 003 is impacted, the impact force can be dispersed to the various side panels 111 and the various partitions 012 via the module shell 001, thereby improving the structural strength of the battery pack 003 and reducing the impact force on the battery cell 023, thereby improving the reliability of the battery pack 003; and the battery cell 023 can dissipate heat all around, so that the heat of the battery cell 023 is transferred to the battery box 002 via the module shell 001, thereby increasing the natural heat dissipation path of the battery 003, thereby improving the heat dissipation effect of the battery cell 023, and reducing the temperature difference of the battery cell 023, thereby improving the reliability of the battery pack 003.

[0076] The embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A module housing, characterized in that: include: The frame comprises a plurality of side panels, wherein the plurality of side panels are sequentially connected to form a surrounding frame structure; A plurality of partitions are sequentially arranged in the inner cavity of the frame at intervals along a first direction to divide the inner cavity of the frame into a plurality of sub-cavities, and the sub-cavities are used to install battery cells.

2. The module housing according to claim 1, characterized in that: The module housing is applied to a battery box, the inner wall of the battery box is provided with a matching groove, and the side of the side plate facing away from the inner cavity is provided with a matching strip, and the matching strip is configured to match with the matching groove.

3. The module housing according to claim 1, characterized in that: Along the axis of the inner cavity of the frame, the frame has a first end face, and the module shell also includes a limit member, there are multiple limit members, and the multiple limit members are arranged on the first end face. The multiple limit members are configured to cooperate with the battery cells located in the multiple sub-cavities.

4. The module housing according to claim 3, characterized in that: The sub-cavity is a rectangular cavity, and the limiting member is arranged opposite to the corner of the sub-cavity corresponding thereto.

5. The module housing according to any one of claims 1 to 4, characterized in that: The battery core is interference fit with the sub-cavity.

6. A battery box, characterized in that: include: lower box; A box cover, covering the lower box body to define a containing cavity; The module housing according to any one of claims 1 to 5 is arranged in the accommodating cavity.

7. The battery box according to claim 6, characterized in that: The inner wall of the lower box body is provided with a matching groove, and the side of the side plate facing away from the inner cavity is provided with a matching strip, and the matching strip matches with the matching groove.

8. The battery box according to claim 6, characterized in that: The lower box body has a first inner wall arranged opposite to the box cover, a plurality of support platforms are arranged on the first inner wall, the plurality of support platforms are configured to support the battery cells, and there is a glue injection space between the support platforms.

9. The battery box according to claim 8, characterized in that: A reinforcement structure is arranged on the outer wall of the battery box.

10. A battery pack, characterized in that: include: A battery box as described in any one of claims 6 to 9; A plurality of battery cells are arranged in one-to-one correspondence with the plurality of sub-cavities.

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