Battery box body and battery pack

Abstract

The utility model provides a battery box body and a battery pack. The battery box comprises an upper cover; an accommodating space for accommodating the battery module is defined by the box body and the upper cover; and the downward pressing frame is connected with the box body, and at least one part of the downward pressing frame abuts against the top of the battery module so as to extrude the battery module in the direction towards the bottom of the box body. According to the utility model, the problem that the restraining effect of the battery pack in the vertical direction is poor in the prior art is solved.

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] In the existing technology, vertical restraint of the battery is generally achieved by reserving an opening in the blue film at the bottom of the battery pack and connecting the aluminum shell at the bottom of the battery cell and the tray box with glue, or directly connecting the blue film at the bottom of the battery pack to the tray box with glue. All of the above methods have shortcomings: they make the battery film process more complicated and the glue thickness is less uniform, resulting in the need for additional glue thickness control measures and increasing manufacturing costs; the interface formed by the battery-blue film-glue-tray box has poor vertical restraint capabilities and cannot meet the complex and stringent working conditions.

[0003] As can be seen from the above, the existing technology has the problem of poor vertical constraint effect on the battery pack. Utility Model Content

[0004] The main purpose of the present utility model is to provide a battery box and a battery pack to solve the problem of poor vertical restraint effect of the battery pack in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery box is provided, including: an upper cover; a box body, the box body and the upper cover form a storage space for accommodating a battery module; a downward pressing frame, the downward pressing frame is connected to the box body, and at least a portion of the downward pressing frame abuts against the top of the battery module to squeeze the battery module in a direction toward the bottom of the box body.

[0006] Furthermore, the pressing frame includes: an edge connecting portion connected to the box body; a middle limiting portion, the middle limiting portion has an avoidance gap for avoiding the battery module, and the middle limiting portion abuts against the top of the battery module.

[0007] Furthermore, the middle limiting portion includes a frame and a first pressure strip, the frame forms an avoidance gap and abuts against the top of the battery module, the first pressure strip extends along a first direction and its two ends are respectively connected to the frame on the opposite side, the first direction is the arrangement direction of the battery cells in the battery cell group of the battery module, there is at least one first pressure strip, and each first pressure strip is located between two adjacent battery cell groups of the battery module.

[0008] Furthermore, the width of the first pressing strips is greater than the distance between two adjacent battery cell groups of the battery module, so that each first pressing strip abuts against the ends of two adjacent battery cell groups of the battery module.

[0009] Furthermore, the middle limiting portion also includes a second pressure strip, which extends along the second direction and has its two ends respectively connected to the frame and the first pressure strip or two adjacent first pressure strips. There are multiple second pressure strips, and each second pressure strip is located between two adjacent battery cells in each battery cell group. The second direction is perpendicular to the first direction.

[0010] Furthermore, the width of the second pressing strips is greater than the distance between two adjacent battery cells in the battery cell group, so that each second pressing strip abuts against the side edges of two adjacent battery cells in the battery cell group.

[0011] Furthermore, the frame protrudes from the edge connection portion and forms an accommodating groove, which is connected to the avoidance notch. At least a portion of the battery module is accommodated in the accommodating groove. The top of the frame has a limiting edge extending inward along the circumferential direction, and the limiting edge abuts against the top of the battery module.

[0012] Furthermore, the ratio of the height of the pressing frame to the height of the battery module is less than or equal to 90%.

[0013] Furthermore, the frame and the edge connecting portion are an integrally formed flat plate.

[0014] According to another aspect of the present invention, a battery pack is provided, comprising a battery module and the above-mentioned battery box, wherein the battery module is accommodated in the battery box.

[0015] By applying the technical solution of the present invention, the battery case includes an upper cover, a case body and a downward pressure frame. The case body and the upper cover form an accommodating space for accommodating the battery module. The downward pressure frame is connected to the case body. At least a portion of the downward pressure frame abuts against the top of the battery module to squeeze the battery module in the direction toward the bottom of the case body. In this way, by setting the downward pressure frame to abut against the battery module, the force transmission path for the vertical constraint of the battery pack is increased, so that a certain proportion of the vertical stress can be borne, thereby realizing effective vertical constraint of the battery pack in the battery case. In addition, under the downward pressure of the downward pressure frame, the thickness of the structural adhesive layer between the battery module and the case body can maintain good consistency, thereby ensuring the consistency of the battery pack temperature, and then ensuring the normal use of the battery pack, solving the problem of poor vertical constraint effect of the battery pack in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of a battery box in a specific embodiment of the present invention is shown;

[0018] Figure 2 An exploded view of a battery pack in a specific embodiment of the present invention is shown;

[0019] Figure 3 A schematic structural diagram of a pressing frame in a specific embodiment of the present invention is shown;

[0020] Figure 4 A schematic structural diagram of a battery box in a specific embodiment of the present invention is shown, with the upper cover hidden at one angle;

[0021] Figure 5 A schematic structural diagram of a battery box in a specific embodiment of the present invention with the upper cover hidden from another angle is shown;

[0022] Figure 6 Shown Figure 5 Cross-section at AA;

[0023] Figure 7 Shown Figure 5 Cross-section at the middle BB;

[0024] Figure 8 The figure shows a schematic structural diagram of an electric device in a specific embodiment of the present utility model.

[0025] The above drawings include the following reference numerals:

[0026] 10. Upper cover; 20. Box body; 30. Lower pressure frame; 31. Edge connection part; 32. Middle limit part; 321. Frame; 322. First pressure strip; 323. Second pressure strip; 40. Battery module; 41. Battery cell group; 411. Battery cell; 4111. Post; 50. Structural adhesive layer; 100. Battery pack; 1000. Electrical device. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0030] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] In order to solve the problem of poor vertical restraint effect of the battery pack in the prior art, the present invention provides a battery box and a battery pack. Among them, the battery pack described below includes the battery box described below.

[0032] like Figures 1 to 2 、 Figure 4 ,as well as Figures 6 and 7 As shown, the battery case includes an upper cover 10, a case body 20, and a downward pressing frame 30. The case body 20 and the upper cover 10 enclose a space for accommodating a battery module 40. The downward pressing frame 30 is connected to the case body 20, and at least a portion of the downward pressing frame 30 abuts against the top of the battery module 40 to compress the battery module 40 toward the bottom of the case body.

[0033] By setting up a battery case including an upper cover 10, a case body 20 and a lower pressing frame 30, the case body 20 and the upper cover 10 form an accommodating space for accommodating the battery module 40, and the lower pressing frame 30 is connected to the case body 20, and at least a portion of the lower pressing frame 30 abuts against the top of the battery module 40 to squeeze the battery module 40 in the direction toward the bottom of the case body 20. In this way, the lower pressing frame 30 abuts against the battery module 40, and the force transmission path of the vertical constraint of the battery pack is increased, so that it can bear a certain proportion of the vertical stress and realize effective vertical constraint of the battery pack in the battery case. In addition, under the downward pressure of the lower pressing frame 30, the thickness of the structural adhesive layer 50 between the battery module 40 and the case body 20 can maintain good consistency, thereby ensuring the consistency of the battery pack temperature and thus ensuring the normal use of the battery pack.

[0034] like Figure 3 As shown, the pressing frame 30 includes an edge connection portion 31 and an intermediate limiting portion 32. The edge connection portion 31 is connected to the box body 20. The intermediate limiting portion 32 has an avoidance gap to avoid the battery module 40, and the intermediate limiting portion 32 abuts the top of the battery module 40. It is understood that the top of each battery cell 411 of the battery module 40 has a pole 4111, and the pole 4111 needs to be electrically connected to the connecting piece to power the external device. Therefore, the pressing frame 30 needs to avoid the pole 4111 while abutting against the battery module 40 and pressing the battery module 40 downward.

[0035] like Figures 3 to 7As shown, the middle limiting portion 32 includes a frame 321 , which forms an avoidance gap and abuts against the top of the battery module 40 .

[0036] In this embodiment, the frame 321 protrudes from the edge connection portion 31 and forms an accommodating groove, which is connected to the avoidance notch, and at least a portion of the battery module 40 is accommodated in the accommodating groove. In other words, the pressing frame 30 in this embodiment is covered on the battery module 40, so that the pressing frame 30 can better abut against the battery module 40 and press down the battery module 40. The frame 321 protrudes from the edge connection portion 31 to form four side walls that are opposite to each other, enclosing the upper part of the battery module 40. Furthermore, the top of the frame 321 has a limiting peripheral edge extending inward along the circumferential direction, and the limiting peripheral edge abuts against the top of the battery module 40. By setting a limiting perimeter, the frame 321 can abut against the battery module 40 in the circumferential direction, so that the battery module 40 can be evenly squeezed downward in the vertical direction, ensuring uniform transmission of vertical force and preventing deviation in the squeezing force, so that the thickness of the structural adhesive layer 50 between the battery module 40 and the box body 20 can maintain good consistency, thereby ensuring the consistency of the battery pack temperature.

[0037] It is understandable that the limiting periphery forms an avoidance gap, and the area of the avoidance gap is smaller than the top surface area of the battery module 40 .

[0038] In this embodiment, the edge connection portion 31 is in the shape of a circular U-shaped rectangle, and the bottom of the frame 321 is connected to the inner periphery of the edge connection portion 31. Accordingly, the top opening of the box body 20 also has a circular U-shaped connection periphery, thereby connecting to the edge connection portion 31. Specifically, the edge connection portion 31 and the box body 20 are welded or bonded. Of course, other connection and fixing methods between the edge connection portion 31 and the box body 20 can also be used, and can be selected according to actual needs.

[0039] In this embodiment, the frame 321 is welded to the edge connection portion 31. Furthermore, the frame 321 and the edge connection portion 31 can also be integrally formed to improve structural strength.

[0040] like Figures 3 to 7As shown, the middle limiting portion 32 also includes a first bead 322. The first bead 322 extends along a first direction, with both ends connected to the opposite side frame 321. The first direction is the arrangement direction of the battery cells 411 in the battery cell group 41 of the battery module 40. In other words, the extension direction of the first bead 322 is the same as the arrangement direction of the battery cells 411 in the battery cell group 41. There is at least one first bead 322, and each first bead 322 is located between two adjacent battery cell groups 41 of the battery module 40. Specifically, each first bead 322 corresponds horizontally to the poles 4111 of two adjacent battery cell groups 41 of the battery module 40. By providing the first bead 322, the middle limiting portion 32 can abut against the inner side of the top of the battery module 40, thereby more fully and evenly squeezing the battery module 40 downward, ensuring uniform transmission of vertical force and preventing deviation in the squeezing force. This allows the thickness of the structural adhesive layer 50 to maintain good consistency, ensuring consistent battery pack temperature.

[0041] Furthermore, when there are multiple first pressing strips 322 , the multiple first pressing strips 322 are spaced apart along the second direction, thereby improving the uniformity of the downward pressing effect.

[0042] Specifically, such as Figure 4 As shown, the battery module 40 in this embodiment includes three groups of battery cell groups 41. Accordingly, there are two first beadings 322, which are located between the first and second battery cell groups, and between the second and third battery cell groups, respectively. The limiting perimeter includes four sections located on the long opposite sides and short opposite sides of the frame 321. The two first beadings 322 are respectively connected to the limiting perimeters on the long opposite sides of the frame 321. In fact, the limiting perimeters located on the short opposite sides of the frame 321 play the same role as the first beadings 322 and can also be regarded as the first beadings 322.

[0043] In this embodiment, the width of the first bead 322 is greater than the distance between two adjacent cell groups 41 of the battery module 40, so that each first bead 322 abuts against the ends of two adjacent cell groups 41 of the battery module 40. Figure 7 As shown. Furthermore, the contact area between each first pressure strip 322 and the ends of two adjacent cell groups 41 of the battery module 40 is the same, that is, each first pressure strip 322 is located in the middle of two adjacent cell groups 41 of the battery module 40. This arrangement allows each cell group 41 and its cells 411 to be pressed down by the pressing frame 30, ensuring uniform transmission of vertical force and preventing deviations in the extrusion force. This allows the thickness of the structural adhesive layer 50 to maintain good consistency, thus ensuring consistent battery pack temperature.

[0044] In this embodiment, if Figures 3 to 7As shown, the middle limiting portion 32 also includes a second bead 323. The second bead 323 extends along the second direction, and its ends are respectively connected to the frame 321 and the first bead 322, or two adjacent first bead 322. There are multiple second bead 323, and each second bead 323 is located between two adjacent battery cells 411 of each battery cell group 41. Specifically, each second bead 323 corresponds horizontally to the poles 4111 of two adjacent battery cells 411 of each battery cell group 41.

[0045] Furthermore, the first pressure strip 322 and the second pressure strip 323 are both lower than the top surface of the pole 4111 in the vertical direction to avoid interference with the electrical connection of the pole 4111 .

[0046] In this embodiment, the second direction is perpendicular to the first direction. Figure 4 As shown, the X direction is the first direction, and the Y direction is the second direction.

[0047] Specifically, corresponding to the three battery cell groups 41, this embodiment includes three groups of second beadings 323. Furthermore, in this embodiment, each battery cell group 41 includes ten battery cells 411, and each group of second beadings 323 includes nine second beadings 323, each second beading 323 being located between two adjacent battery cells 411 in each battery cell group 41. In fact, the limiting edges located on the long opposite sides of the frame 321 play the same role as the second beadings 323 and can also be regarded as the second beadings 323.

[0048] In this embodiment, the width of the second bead 323 is greater than the distance between two adjacent battery cells 411 of the battery cell group 41, so that each second bead 323 abuts against the side edges of two adjacent battery cells 411 of the battery cell group 41. Figure 6 As shown. Furthermore, the contact area between each second pressure strip 323 and two adjacent battery cells 411 of each battery cell group 41 is the same, that is, each second pressure strip 323 is located in the middle of two adjacent battery cells 411 of each battery cell group 41. Through the above arrangement, each battery cell group 41 and its battery cells 411 can be pressed down by the pressing frame 30, ensuring uniform transmission of vertical force and preventing deviation in the extrusion force, so that the thickness of the structural adhesive layer 50 can be maintained at a good consistency, ensuring the consistency of the battery pack temperature.

[0049] It can be understood that the first bead 322 and the second bead 323 in this embodiment are cross-arranged to form a grid structure, and each grid corresponds to a battery cell 411. For a battery cell 411, its two ends are pressed down by the limiting periphery of the short opposite sides of the first bead 322 or the frame 321, and its two sides are pressed down by the limiting periphery of the long opposite sides of the second bead 323 or the frame 321. In other words, the top periphery of each battery cell 411 is pressed down by the pressing frame 30. Through the above-mentioned arrangement, the uniform transmission of vertical force can be guaranteed, and the deviation of extrusion force can be prevented, so that the thickness of the structural adhesive layer 50 can maintain good consistency, thereby ensuring the consistency of the battery pack temperature.

[0050] In this embodiment, the first and second beading strips 322, 323 are welded to the frame 321 and to each other. Furthermore, the first and second beading strips 322, 323 can also be integrally formed with the frame 321, i.e., the entire intermediate retaining portion 32 is a one-piece component, thereby improving structural strength. Using this one-piece molding approach, the grid structure can be directly cut and machined to correspond to each battery cell 411, which is convenient and quick.

[0051] In this embodiment, the ratio of the height of the hold-down frame 30 to the height of the battery module 40 is less than or equal to 90%. It is understood that the height of the battery module 40 is compatible with the overall height of the hold-down frame 30 and the housing body 20. When the height of the hold-down frame 30 is greater, the height of the housing body 20 can be correspondingly reduced. Of course, the hold-down frame 30 cannot replace the housing body 20. To ensure the secure connection between the hold-down frame 30 and the housing body 20 and the overall structural strength, the height of the housing body 20 should not be too small, that is, the height of the hold-down frame 30 should not be too large. Therefore, the ratio of the height of the hold-down frame 30 to the height of the battery module 40 needs to be less than or equal to 90%.

[0052] In an optional embodiment, the frame 321 and the edge connection portion 31 are an integrally formed flat plate. In other words, the frame 321 in this embodiment does not protrude from the edge connection portion 31, that is, the hold-down frame 30 is a flat plate structure. The avoidance notch or grid structure can be directly opened in the middle position of the hold-down frame 30, so that the hold-down frame 30 is laid flat on the battery module 40 and abuts against the top of the battery module 40. The hold-down frame 30 in this embodiment has a simple structure, can reduce material consumption, and save manufacturing costs.

[0053] like Figure 2 As shown, the present application also provides a battery pack, including a battery module 40 and the above-mentioned battery box, and the battery module 40 is accommodated in the battery box.

[0054] like Figure 2 、 Figures 6 and 7As shown, the battery pack also includes a structural adhesive layer 50, which is disposed between the battery module 40 and the inner bottom surface of the housing 20 and is used to bond and secure the battery module 40. With the battery housing of this embodiment, by providing a downward pressure frame 30, the downward pressure of the downward pressure frame 30 ensures that the thickness of the structural adhesive layer 50 between the battery module 40 and the housing 20 remains relatively consistent, thereby ensuring consistent battery pack temperature and, in turn, ensuring normal use of the battery pack.

[0055] like Figure 8 As shown, the present application also provides an electric device 1000, including the above-mentioned battery pack 100. The battery pack 100 described in the embodiment of the present application is applicable to various electric devices 1000 using the battery pack 100. Specifically, the electric device 1000 can be a mobile phone, a portable device, a laptop computer, a vehicle, a ship, a spacecraft, an electric toy, an electric tool, etc. The embodiment of the present application does not impose any special restrictions on the above-mentioned electric device 1000.

[0056] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: by setting a battery case including an upper cover 10, a case body 20 and a lower pressing frame 30, the case body 20 and the upper cover 10 enclose a accommodating space for accommodating the battery module 40, and the lower pressing frame 30 is connected to the case body 20, and at least a portion of the lower pressing frame 30 abuts against the top of the battery module 40 to squeeze the battery module 40 in the direction toward the bottom of the case body 20. In this way, the lower pressing frame 30 abuts against the battery module 40, thereby increasing the force transmission path of the vertical constraint of the battery pack, thereby being able to bear a certain proportion of the vertical stress and realizing effective vertical constraint of the battery pack in the battery case. In addition, under the downward pressure of the lower pressing frame 30, the thickness of the structural adhesive layer 50 between the battery module 40 and the case body 20 can maintain good consistency, thereby ensuring the consistency of the battery pack temperature and thus ensuring the normal use of the battery pack.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0058] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery box, characterized in that: include: Upper cover (10); A box body (20), wherein the box body (20) and the upper cover (10) enclose an accommodating space for accommodating a battery module (40); A pressing frame (30) is connected to the box body (20), and at least a portion of the pressing frame (30) abuts against the top of the battery module (40) to press the battery module (40) in a direction toward the bottom of the box body (20).

2. The battery box according to claim 1, characterized in that: The pressing frame (30) comprises: an edge connection portion (31), the edge connection portion (31) being connected to the box body (20); An intermediate limiting portion (32) has an avoidance gap for avoiding the battery module (40), and the intermediate limiting portion (32) abuts against the top of the battery module (40).

3. The battery box according to claim 2, characterized in that: The intermediate limiting portion (32) comprises a frame (321) and a first pressure strip (322), the frame (321) enclosing the avoidance gap and abutting against the top of the battery module (40), the first pressure strip (322) extending along a first direction and having two ends connected to the frame (321) on the opposite side, the first direction being the arrangement direction of the battery cells (411) in the battery cell group (41) of the battery module (40), the first pressure strip (322) being at least one, and each first pressure strip (322) being located between two adjacent battery cell groups (41) of the battery module (40).

4. The battery box according to claim 3, characterized in that: The width of the first pressure strip (322) is greater than the distance between two adjacent battery cell groups (41) of the battery module (40), so that each of the first pressure strips (322) respectively abuts against the ends of two adjacent battery cell groups (41) of the battery module (40).

5. The battery box according to claim 3, characterized in that: The intermediate limiting portion (32) further includes a second pressure strip (323), the second pressure strip (323) extending along a second direction and having two ends respectively connected to the frame (321) and the first pressure strip (322) or two adjacent first pressure strips (322), there are a plurality of second pressure strips (323), each second pressure strip (323) being located between two adjacent battery cells (411) of each battery cell group (41), and the second direction is perpendicular to the first direction.

6. The battery box according to claim 5, characterized in that: The width of the second pressure strip (323) is greater than the distance between two adjacent battery cells (411) of the battery cell group (41), so that each of the second pressure strips (323) respectively abuts against the side edges of two adjacent battery cells (411) of the battery cell group (41).

7. The battery box according to claim 3, characterized in that: The frame (321) protrudes from the edge connection portion (31) and forms a receiving groove, the receiving groove is communicated with the avoidance notch, at least a portion of the battery module (40) is received in the receiving groove, and the top of the frame (321) has a limiting peripheral edge extending inwardly along the circumferential direction, and the limiting peripheral edge abuts against the top of the battery module (40).

8. The battery box according to claim 7, characterized in that: The ratio between the height of the pressing frame (30) and the height of the battery module (40) is less than or equal to 90%.

9. The battery box according to claim 3, characterized in that: The frame (321) and the edge connection portion (31) are an integrally formed flat plate.

10. A battery pack, characterized in that: The invention comprises a battery module (40) and a battery case according to any one of claims 1 to 9, wherein the battery module (40) is accommodated in the battery case.

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