Battery pack and electric device

Abstract

The utility model provides a kind of battery pack and electrical equipment, it is applied to battery production manufacturing technical field, wherein battery pack includes multiple edge beams and bottom plate, multiple edge beams and bottom plate are enclosed and are used to accommodate the accommodation space of battery, first batten is equipped in accommodation space, accommodation space is divided into electrical bin and battery bin by first batten, first batten is connected with edge beam welding, the side of first batten away from bottom plate is equipped with second batten, second batten extends along the length direction of first batten, second batten is sealed and connected between first batten by first sealing element, the end of second batten length direction is sealed and connected between edge beam by second sealing element.Compared with prior art, the gap between first batten and second batten can be sealed by the setting of first sealing element, the gap between the end of second batten and edge beam can be sealed by the setting of second sealing element, the overall safety reliability and operating stability of battery pack are greatly improved by the structure setting.

Description

Technical Field

[0001] This utility model belongs to the field of battery manufacturing technology, and specifically relates to a battery pack and electrical equipment. Background Technology

[0002] In fields such as new energy vehicles and energy storage power stations, battery packs are the core energy carriers, and the physical isolation and sealing performance of their battery compartment and electrical compartment are crucial to preventing the risk of battery thermal runaway and ensuring the stable operation of the electrical system.

[0003] Currently, the battery compartment and electrical compartment are mainly separated by partition beams. In order to allow the FPC harness to be introduced from the battery compartment to the electrical compartment, the partition beam is usually set as a combination of a first partition beam and a second partition beam. The first partition beam is welded and sealed to the side beam of the battery box, and the second partition beam is detachably fixed to the first partition beam. The FPC harness passes through the gap between the first partition beam and the second partition beam to realize the electrical connection between the battery compartment and the electrical compartment.

[0004] Because the second partition beam is detachably fixed to the first partition beam, the second partition beam cannot be effectively sealed to the side beam of the enclosure, resulting in the battery compartment and the electrical compartment being connected at this point. When the battery compartment experiences thermal runaway, high-temperature gas can easily enter the electrical compartment, causing the entire battery pack to fail. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a battery pack that can effectively prevent high-temperature gas from entering the electrical compartment when thermal runaway occurs in the battery compartment, thereby improving the overall safety, reliability and operational stability of the battery pack.

[0006] Another objective of this utility model is to provide an electrical device.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A battery pack, characterized in that it includes a plurality of side beams and a base plate, the plurality of side beams and the base plate forming an accommodating space for accommodating a battery, a first partition beam being provided within the accommodating space, the first partition beam dividing the accommodating space into an electrical compartment and a battery compartment, the first partition beam being welded to the side beams, a second partition beam being provided on the side of the first partition beam away from the base plate, the second partition beam extending along the length direction of the first partition beam, the second partition beam being sealed to the first partition beam by a first sealing member, and the end of the second partition beam in the length direction being sealed to the side beam by a second sealing member.

[0009] As can be seen from the above technical solutions, compared with the prior art, the battery pack disclosed in this utility model can seal the gap between the first partition beam and the second partition beam by setting the first sealing member, and seal the gap between the end of the second partition beam and the side beam by setting the second sealing member. With this setting, the battery compartment and the electrical compartment are completely isolated. When the battery in the battery compartment generates high-temperature gas due to thermal runaway, the high-temperature gas will not enter the electrical compartment through the gap between the first partition beam and the second partition beam, or the gap between the end of the second partition beam and the side beam, and affect the normal operation of the electrical components in the battery compartment. Therefore, this structural setting greatly improves the overall safety, reliability and operational stability of the battery pack. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the external structure of the battery pack disclosed in the embodiments of this utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of the battery pack disclosed in the embodiment of this utility model;

[0013] Figure 3 for Figure 2 Top view;

[0014] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0015] Figure 5 This is a partial structural schematic diagram of the battery pack disclosed in the embodiments of this utility model;

[0016] Figure 6 This is a partially enlarged structural diagram of the battery pack disclosed in the embodiments of this utility model;

[0017] Figure 7 This is a schematic diagram of the structure of the second sealing element disclosed in the embodiment of this utility model;

[0018] Figure 8 This is a schematic diagram of the arrangement structure of the first partition beam and the second partition beam disclosed in the embodiment of this utility model;

[0019] Figure 9 This is a schematic diagram of the end face structure of the second partition beam disclosed in one embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100-edge beam,

[0022] 200-base plate,

[0023] 300 - Storage space, 301 - Electrical compartment, 302 - Battery compartment.

[0024] 400 - First partition beam,

[0025] 500 - Second partition beam,

[0026] 600 - First seal

[0027] 700 - Second sealing element, 701 - First sealing plate, 702 - Second sealing plate, 703 - First fixing plate, 704 - Second fixing plate, 705 - Auxiliary reinforcing rib.

[0028] 800 - Filling cavity. Detailed Implementation

[0029] In view of this, the core of this utility model is to provide a battery pack that can effectively prevent high-temperature gas from entering the electrical compartment when thermal runaway occurs in the battery compartment, thereby improving the overall safety, reliability and operational stability of the battery pack.

[0030] Another core aspect of this utility model is that it provides an electrical device.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Please refer to... Figures 1 to 9 .

[0032] Please refer to Figures 1 to 8 The battery pack disclosed in this embodiment of the present invention includes multiple side beams 100 and a base plate 200. The multiple side beams 100 and the base plate 200 form a housing space 300 for accommodating batteries. A first partition beam 400 is provided in the housing space 300, which divides the housing space 300 into an electrical compartment 301 and a battery compartment 302. The first partition beam 400 is welded to the side beams 100. A second partition beam 500 is provided on the side of the first partition beam 400 away from the base plate 200. The second partition beam 500 extends along the length direction of the first partition beam 400. The second partition beam 500 and the first partition beam 400 are sealed together by a first sealing member 600. The end of the second partition beam 500 in the length direction is sealed together with the side beam 100 by a second sealing member 700.

[0033] Compared with the prior art, the battery pack disclosed in this embodiment of the utility model has a first sealing member 600 that can seal the gap between the first partition beam 400 and the second partition beam 500, and a second sealing member 700 that can seal the gap between the end of the second partition beam 500 and the side beam 100. With this configuration, the battery compartment 302 and the electrical compartment 301 are completely isolated. When the battery in the battery compartment 302 generates high-temperature gas due to thermal runaway, the high-temperature gas will not enter the electrical compartment 301 through the gap between the first partition beam 400 and the second partition beam 500 or the gap between the end of the second partition beam 500 and the side beam 100, thus affecting the normal operation of the electrical components in the battery compartment 302. Therefore, this structural configuration greatly improves the overall safety, reliability and operational stability of the battery pack.

[0034] This embodiment of the utility model does not limit the specific materials of the side beam 100 and the bottom plate 200. Any material that meets the requirements of this utility model is within the protection scope of this utility model.

[0035] Among them, the side beam 100 and the bottom plate 200 can be cast from materials such as steel plates and aluminum alloys, or lightweight materials such as glass fiber reinforced composite materials and carbon fiber reinforced composite materials.

[0036] As a further embodiment, the height of the second sealing member 700 disclosed in this utility model embodiment is h1mm, the height of the second partition beam 500 is h2mm, and h1 / h2 ≥ 1.2. For example, h1 / h2 can specifically be 1.2, 1.3, 2, 5, 8, etc.

[0037] The setting of the h1 / h2 ratio disclosed in this embodiment of the present invention can effectively ensure the sealing effect between the second partition beam 500 and the side beam 100. If the h1 / h2 ratio is too small, it may lead to poor sealing effect. When the battery in the battery compartment 302 generates high-temperature gas due to thermal runaway, the high-temperature gas may enter the electrical compartment 301 through the gap between the end of the second partition beam 500 and the side beam 100, thereby affecting the normal operation of the electrical components in the battery compartment 302.

[0038] This utility model embodiment does not limit the specific arrangement of the second sealing element 700 and the side beam 100. Any arrangement that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0039] As one specific embodiment, the upper surface of the second sealing member 700 disclosed in this utility model embodiment is flush with the upper surface of the second partition beam 500. This structural arrangement can achieve effective sealing between the second partition beam 500 and the side beam 100.

[0040] In another specific embodiment, the upper surface of the second sealing element 700 disclosed in this utility model embodiment is lower than the upper surface of the second partition beam 500, and the distance between the upper surface of the second sealing element 700 and the upper surface of the second partition beam 500 is L1, where L1 ≤ 3mm. For example, L1 can be 3mm, 2.5mm, 2mm, 1.5mm, 1mm, etc. This setting can save material costs for the second sealing element 700 and also achieve sealing between the second partition beam 500 and the side beam 100. However, L1 cannot be too large; if L1 is too large, it may lead to poor sealing performance.

[0041] As a further embodiment, the lower surface of the second sealing member 700 disclosed in this embodiment extends to the upper surface of the base plate 200. This arrangement not only achieves a seal between the end of the second partition beam 500 and the side beam 100, but also enhances the structural strength of the second sealing member 700 within the battery pack.

[0042] This utility model embodiment does not limit the specific fixing method of the second sealing member 700 to the side beam 100, the first partition beam 400, and the second partition beam 500. Any fixing method that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0043] In one specific embodiment, the second sealing member 700 disclosed in this utility model embodiment is welded and fixed to the side beam 100, the first partition beam 400, and the second partition beam 500.

[0044] In another specific embodiment, the second sealing member 700 disclosed in this utility model embodiment is glued and fixed to the side beam 100, the first partition beam 400, and the second partition beam 500.

[0045] As a further embodiment, the second sealing member 700, the second partition beam 500, and the side beam 100 disclosed in this embodiment of the present invention are connected to form a filling cavity 800, wherein the filling cavity 800 is filled with expanding foam. This arrangement completely seals the gap between the second partition beam 500 and the side beam 100, enhancing the connection strength between the second partition beam 500 and the side beam 100 while also achieving complete isolation between the battery compartment 302 and the electrical compartment 301.

[0046] The preferred material for the foam is MPP (microporous polypropylene), which is lightweight, has good toughness, and its microporous structure provides good cushioning, breathability, or sound insulation.

[0047] It should be noted that the upper surface of the expanding foam is flush with or extends beyond the upper surface of the second partition beam 500. When it extends beyond the partition beam, the upper surface of the expanding foam is connected to the battery box cover.

[0048] The present invention does not limit the specific shape of the filling cavity 800. The filling cavity 800 can be triangular, rectangular, or other shapes, depending on the specific structure of the second sealing member. The present invention does not limit this specific shape.

[0049] This embodiment of the utility model does not limit the specific structure of the second sealing element 700. Any structure that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0050] As one embodiment, the second sealing member 700 disclosed in this utility model embodiment is a rectangular flat plate structure (not shown in the figure), wherein the filling cavity 800 formed by the connection of the second sealing member 700, the second partition beam 500 and the side beam 100 is triangular in shape. With this configuration, the structure of the second sealing member 700 is relatively simple and the cost is also low.

[0051] As another implementation embodiment, please refer to the following for details. Figures 7 to 8 The second sealing element 700 disclosed in this embodiment of the present invention includes a first sealing plate 701, a second sealing plate 702, a first fixing plate 703, and a second fixing plate 704. The first fixing plate 703 is connected to the side beam 100, and the second fixing plate 704 is connected to the second partition beam 500. The first sealing plate 701 is connected to one side of the first fixing plate 703 and the second fixing plate 704, and the second sealing plate 702 is connected to the other side of the first fixing plate 703 and the second fixing plate 704. The cavity formed by the connection of the first sealing plate 701, the second sealing plate 702, the first fixing plate 703, and the second fixing plate 704 is trapezoidal in shape. The filling cavity 800 is formed by the connection of the first fixing plate 703, the side beam 100, and the second partition beam 500. This arrangement not only facilitates the installation of the second sealing element 700 but also effectively improves the connection strength between the second partition beam 500 and the side beam 100.

[0052] To further enhance the strength and rigidity of the second seal 700, an auxiliary reinforcing rib 705 is also provided in the trapezoidal filling cavity 800 disclosed in this embodiment of the present invention.

[0053] This embodiment of the utility model does not limit the end face shape of the second partition beam 500. Any shape that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0054] As a specific embodiment of this utility model, please refer to Figure 8 In this embodiment of the invention, both ends of the second partition beam 500 are vertical. This design facilitates the processing of the second partition beam 500 and also the manufacturing of the second sealing element 700.

[0055] As another embodiment of this utility model, please refer to Figure 9 Both ends of the second partition beam 500 disclosed in this embodiment of the present invention are inclined surfaces.

[0056] When both ends of the second partition beam 500 are inclined surfaces, the second sealing element 700 is a sealing strip.

[0057] As a specific embodiment, when both ends of the second partition beam 500 are inclined surfaces, the projection of the second sealing member 700 on the second partition beam 500 covers the inclined surfaces. Along the length of the second partition beam 500, the minimum distance from the connection point of the second sealing member 700 and the second partition beam 500 to the edge of the inclined surface is L2mm, where L2mm ≥ 0mm. For example, L2mm can specifically be 0mm, 3mm, 4mm, 5mm, or 6mm, etc. With this configuration, the gap between the end face of the second partition beam 500 and the side beam 100 or the first partition beam 400 can be completely covered by expanding foam, thereby achieving a seal between the second partition beam 500 and the first partition beam 400, and between the second partition beam 500 and the side beam 100.

[0058] The length direction of the second partition beam 500 is the width direction of the battery pack.

[0059] In another specific embodiment, when both ends of the second partition beam 500 are inclined surfaces, the projection of the second sealing member 700 on the second partition beam 500 covers the inclined surfaces, and the connection between the second sealing member 700 and the second partition beam 500 is flush with the edge of the inclined surfaces. This configuration allows the second sealing member 700 to completely fill the gap, thereby effectively improving the sealing performance between the second partition beam 500 and the second sealing member 700.

[0060] As a further embodiment, the angle between the inclined plane and the first partition beam 400 disclosed in this utility model embodiment is 30°-70°. For example, the angle between the first partition beams 400 can be specifically 30°, 35°, 40°, 45°, and 60°. If the angle between the inclined plane and the first partition beam 400 is too large, the gap space will be too small, which is not conducive to the installation of the sealing strip; if the angle between the inclined plane and the first partition beam 400 is too small, the gap space will be too large, and the cost of processing the sealing strip will be high. The setting of the angle between the inclined plane and the first partition beam 400 disclosed in this utility model embodiment can not only effectively reduce the cost of processing and manufacturing the sealing strip, but also facilitate the installation of the sealing strip.

[0061] In another specific embodiment of this utility model, the first sealing element 600 disclosed in this embodiment is a sealing strip, wherein the first sealing element 600 extends along the length direction of the second partition beam 500 to the inclined surface and covers the inclined surface. This structure does not require an additional second sealing element 700 or foam adhesive; it is sufficient to extend the first sealing element 600 between the first partition beam 400 and the second partition beam 500 to the inclined surface, thus achieving the same good sealing effect.

[0062] As a further embodiment, the thickness of the first sealing element 600 disclosed in this utility model embodiment is 1mm-5mm. For example, the thickness of the first sealing element 600 can be 1mm, 2mm, 3mm, 4mm, and 5mm, etc. If the thickness of the first sealing element 600 is too small, it may lead to poor sealing effect; if the thickness of the first sealing element 600 is too large, it may affect the overall height of the first partition beam 400 and the second partition beam 500.

[0063] As a specific embodiment of this utility model, the material of the first sealing element 600 disclosed in this utility model embodiment can be silicone, fluororubber, soluble polytetrafluoroethylene, etc.

[0064] This utility model embodiment also discloses an electrical device, including a battery pack as disclosed in any of the above embodiments.

[0065] Since the electrical device uses the battery pack disclosed in the present utility model embodiment, the electrical device also has the technical advantages of the battery pack disclosed in the present utility model embodiment, and the present utility model embodiment will not elaborate on these advantages further.

[0066] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0067] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0068] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery pack, characterized in that, The device includes multiple side beams and a base plate, which together form an accommodating space for accommodating a battery. A first partition beam is provided within the accommodating space, dividing the space into an electrical compartment and a battery compartment. The first partition beam is welded to the side beams. A second partition beam is provided on the side of the first partition beam away from the base plate, extending along the length of the first partition beam. The second partition beam is sealed to the first partition beam by a first sealing element, and the end of the second partition beam along its length is sealed to the side beam by a second sealing element.

2. The battery pack according to claim 1, characterized in that, The height of the second seal is h1mm, the height of the second partition beam is h2mm, and h1 / h2≥1.

2.

3. The battery pack according to claim 1, characterized in that, The upper surface of the second seal is flush with the upper surface of the second partition beam.

4. The battery pack according to claim 1, characterized in that, The upper surface of the second seal is lower than the upper surface of the second partition beam, and the distance between the upper surface of the second seal and the upper surface of the second partition beam is L1, where L1 ≤ 3 mm.

5. The battery pack according to claim 1, characterized in that, The lower surface of the second seal extends to the upper surface of the base plate.

6. The battery pack according to claim 1, characterized in that, The second sealing element is welded or glued to the side beam, the first partition beam, and the second partition beam.

7. The battery pack according to claim 1, characterized in that, The second seal, the second partition beam, and the side beam are connected to form a filling cavity, which is filled with expanding foam.

8. The battery pack according to claim 7, characterized in that, The second sealing element includes a first sealing plate, a second sealing plate, a first fixing plate, and a second fixing plate; The first fixing plate is connected to the side beam, the second fixing plate is connected to the second partition beam, the first sealing plate is connected to one side of the first fixing plate and the second fixing plate, the second sealing plate is connected to the other side of the first fixing plate and the second fixing plate, and the cavity formed by the connection of the first sealing plate, the second sealing plate, the first fixing plate and the second fixing plate is trapezoidal in shape. The filling cavity is formed by connecting the first fixing plate, the side beam, and the second partition beam.

9. The battery pack according to claim 1, characterized in that, Both ends of the second partition beam are vertical.

10. The battery pack according to claim 1, characterized in that, Both ends of the second partition beam are inclined surfaces.

11. The battery pack according to claim 10, characterized in that, The projection of the second seal on the second partition beam covers the inclined surface, and along the length direction of the second partition beam, the minimum distance from the connection point of the second seal and the second partition beam to the edge of the inclined surface is L2, where L2≥0mm.

12. The battery pack according to claim 10, characterized in that, The angle between the inclined plane and the first partition beam is 30°-70°.

13. The battery pack according to claim 10, characterized in that, The first sealing element is a sealing strip, which extends along the length of the second partition beam to the inclined surface and covers the inclined surface.

14. The battery pack according to claim 13, characterized in that, The thickness of the first seal is 1mm-5mm.

15. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-14.

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