Battery pack

Abstract

The application relates to the technical field of batteries, in particular to a battery pack which comprises a bottom plate, a bottom guard plate and a beam, the bottom guard plate is located below the beam, the bottom plate is located between the bottom guard plate and the beam, the bottom guard plate is provided with a positioning hole, the battery pack further comprises a protective sleeve, a part of the protective sleeve is arranged in the positioning hole and connected with the bottom guard plate, the top of the protective sleeve abuts against the beam, and the beam, the bottom guard plate and the protective sleeve are connected through fasteners penetrating through the protective sleeve. Through the abutment design of the protective sleeve and the beam, the connection effect of the bottom guard plate and the beam can be further optimized on the basis of guaranteeing the reliable connection of the bottom guard plate and the beam, and the connection strength of the bottom guard plate and the beam is improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a battery pack. Background Technology

[0002] The existing battery pack has a base plate sandwiched between the bottom cover and the beam, leaving a gap between them. However, when the bottom cover is connected to the beam using fasteners, the bottom cover is pulled towards the beam, which can easily damage it. Summary of the Invention

[0003] A primary objective of this invention is to overcome at least one of the deficiencies of the prior art and to provide a battery pack with higher connection strength between the bottom guard plate and the beam.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] According to one aspect of the present invention, a battery pack is provided, including a base plate, a bottom protective plate, and a beam. The bottom protective plate is located below the beam, and the base plate is located between the bottom protective plate and the beam. The bottom protective plate has a positioning hole. The battery pack also includes a protective sleeve, a portion of which is disposed in the positioning hole and connected to the bottom protective plate. The top of the protective sleeve abuts against the beam. The beam, the bottom protective plate, and the protective sleeve are connected by fasteners that penetrate the protective sleeve.

[0006] As can be seen from the above technical solution, the advantages and positive effects of the battery pack proposed in this invention are as follows:

[0007] The battery pack proposed in this invention includes a base plate, a bottom protective plate, and a beam. The bottom protective plate is located below the beam, and the base plate is located between the bottom protective plate and the beam. The bottom protective plate has positioning holes. The battery pack also includes a protective sleeve, a portion of which is disposed in the positioning holes and connected to the bottom protective plate. The top of the protective sleeve abuts against the beam. The beam, base plate, and protective sleeve are connected by fasteners that penetrate the protective sleeve. Through the above design, this invention can utilize the abutment design between the protective sleeve and the beam to further optimize the connection effect and improve the connection strength between the bottom protective plate and the beam, while ensuring the reliability of the connection. Attached Figure Description

[0008] Various objects, features, and advantages of the invention will become more apparent from the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are merely illustrative of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0009] Figure 1 This is a bottom view of a battery pack according to an exemplary embodiment;

[0010] Figure 2 It is along Figure 1 A sectional view of line AA in the diagram;

[0011] Figure 3 yes Figure 2 A schematic diagram of its breakdown.

[0012] The annotations in the attached figures are explained as follows:

[0013] 100. Bottom protection plate;

[0014] 110. Positioning hole;

[0015] 111. First hole;

[0016] 112. Second hole;

[0017] 120. Cavity;

[0018] 131. Upper wall;

[0019] 132. Lower wall;

[0020] 140. The first step;

[0021] 200. Base plate;

[0022] 300. Beam;

[0023] 310. Screw insert;

[0024] 400. Protective case;

[0025] 410. Part One;

[0026] 420. Part Two;

[0027] 430. The second step;

[0028] 440. Through hole;

[0029] 441. Third hole;

[0030] 442. Fourth hole;

[0031] 450. The third step;

[0032] 500. Bolts;

[0033] 510. Nut section;

[0034] 520. Screw section;

[0035] 600. Seals;

[0036] 700. Buffer. Detailed Implementation

[0037] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the description and drawings therein are for illustrative purposes only and not intended to limit the present invention.

[0038] In the following description of different exemplary embodiments of the invention, reference is made to the accompanying drawings, which form part of the invention, and in which different exemplary structures, systems, and steps that can implement various aspects of the invention are shown by way of example. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of the invention. Furthermore, although the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of the invention, these terms are used herein only for convenience, such as the orientation according to the examples shown in the drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the invention.

[0039] See Figure 1 The illustration shows a bottom view of the battery pack proposed in this invention. In this exemplary embodiment, the battery pack proposed in this invention is described using a vehicle battery as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this invention to other types of battery packs, and these changes are still within the scope of the principles of the battery pack proposed in this invention.

[0040] like Figure 1 As shown, in one embodiment of the present invention, the battery pack proposed by the present invention includes a base plate, a bottom protective plate 100, and a beam. (See also...) Figure 2 and Figure 3 , Figure 2 The middle section represents the way along Figure 1 A sectional view of line AA in the diagram; Figure 3 China representatively shows Figure 2 An exploded view is shown below. The structure, connection method, and functional relationship of the main components of the battery pack proposed in this invention will be described in detail below with reference to the above-mentioned figures.

[0041] like Figure 2 and Figure 3As shown, in one embodiment of the present invention, the bottom protective plate 100 is located below the beam 300, and the bottom plate 200 is located between the bottom protective plate 100 and the beam 300. The bottom protective plate 100 has a positioning hole 110, and the battery pack proposed in this invention also includes a protective sleeve 400. A portion of the protective sleeve 400 is disposed in the positioning hole 110 and connected to the bottom protective plate 100. The top of the protective sleeve 400 abuts against the beam 300. The beam 300, the bottom protective plate 100, and the protective sleeve 400 are connected together by fasteners penetrating the protective sleeve 400. Through the above design, the present invention can utilize the abutment design between the protective sleeve 400 and the beam 300 to further optimize the connection effect between the bottom protective plate 100 and the beam 300 while ensuring the reliability of the connection. This improves the connection strength between the bottom protective plate 100 and the beam 300 and avoids structural damage to the bottom protective plate 100 caused by pulling it towards the beam 300 during fastening.

[0042] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, the bottom protective plate 100 can be an extruded profile plate. Based on this, the bottom protective plate 100 has an internal cavity. Through the above structural design, the present invention can reduce the weight of the bottom protective plate 100, which is beneficial for the lightweight design of the battery pack. It can also improve the structural strength of the bottom protective plate 100, avoiding the problem of flow channel damage caused by bottom impact squeezing the inside of the battery box, such as the heat exchange plate, thus improving the overall reliability of the battery pack. Simultaneously, the cavity design can reduce heat loss from the battery pack through the bottom protective plate 100, further improving the temperature uniformity of the battery pack.

[0043] like Figure 2 and Figure 3 As shown, based on the design of the bottom protective plate 100 as an extruded profile plate with a cavity, in one embodiment of the present invention, the positioning hole 110 can penetrate the cavity, and the protective sleeve 400 can seal the cavity. Through the above design, the present invention can use the protective sleeve 400 to seal the cavity exposed by the positioning hole 110, preventing foreign objects from entering the cavity of the bottom protective plate 100, and further optimizing the sealing performance. In some embodiments, the positioning hole 110 can also be non-penetrating the cavity, that is, the channel of the positioning hole 110 and the cavity of the bottom protective plate 100 may not be connected. For example, an annular wall surrounding the channel of the positioning hole 110 can be provided in the cavity, thereby defining the positioning hole 110 and separating the channel of the positioning hole 110 from the cavity.

[0044] like Figure 2 and Figure 3As shown, based on the design of the bottom protective plate 100 as an extruded profile plate with a cavity, in one embodiment of the present invention, the bottom protective plate 100 has an upper wall 131 and a lower wall 132 spaced apart. Specifically, the upper wall 131 is closer to the bottom plate 200 than the lower wall 132, and the cavity is located between the upper wall 131 and the lower wall 132. Furthermore, a positioning hole 110 penetrates the upper wall 131 and the lower wall 132.

[0045] Based on the design of the bottom protective plate 100 having an upper wall 131 and a lower wall 132, in one embodiment of the present invention, a rib plate can be provided in the cavity, which is supported between the upper surface of the lower wall 132 and the lower surface of the upper wall 131.

[0046] like Figure 2 and Figure 3 As shown, based on the design of the bottom protective plate 100 having an upper wall 131 and a lower wall 132, in one embodiment of the present invention, the positioning hole 110 may have a first hole 111 and a second hole 112 that are connected. Specifically, the first hole 111 penetrates the lower wall 132, and the second hole 112 penetrates the upper wall 131. Furthermore, the diameter of the first hole 111 may be larger than the diameter of the second hole 112, so that the lower surface of the upper wall 131 forms a first step 140 at the periphery of the second hole 112. Through the above design, the present invention can realize the setting of the positioning hole 110 on the bottom protective plate 100 having an upper wall 131 and a lower wall 132. Simultaneously, the present invention can utilize the first step 140 to achieve structural positioning. Preferably, the first hole 111 and the second hole 112 can be coaxially arranged for easy molding.

[0047] like Figure 2 and Figure 3 As shown, based on the design of the positioning hole 110 having a first hole 111 and a second hole 112, in one embodiment of the present invention, the protective sleeve 400 may have a first part 410 and a second part 420 connected to each other. Specifically, the second part 420 is closer to the beam 300 than the first part 410. The first part 410 is partially disposed in the first hole 111 (as mentioned above, the first part 410 can block the cavity of the bottom protective plate 100), a part of the second part 420 is disposed in the second hole 112, and the other part of the second part 420 extends out of the second hole 112 and abuts against the beam 300. Since the first part 410 and the second part 420 are respectively disposed in the first hole 111 and the second hole 112, that is, the outer diameter of the first part 410 is larger than the outer diameter of the second part 420. On this basis, a second step 430 can be formed at the connection between the first part 410 and the second part 420, and the second step 430 is in a limiting fit with the first step 140. Through the above design, the present invention can achieve relative positioning of the protective sleeve 400 in the positioning hole 110 by utilizing the cooperative design of the first step 140 and the second step 430.

[0048] like Figure 2 and Figure 3 As shown, based on the design of the protective sleeve 400 having a first part 410 and a second part 420, in one embodiment of the present invention, the protective sleeve 400 may have a through hole 440, which penetrates the protective sleeve 400 and is used to accommodate fasteners. Specifically, the through hole 440 has a connected third hole 441 and a fourth hole 442. The third hole 441 penetrates the first part 410 of the protective sleeve 400, and the fourth hole 442 penetrates the second part 420 of the protective sleeve 400. The diameter of the third hole 441 may be larger than that of the fourth hole 442, so that a third step 450 is formed at the connection between the third hole 441 and the fourth hole 442. Through the above design, the present invention can utilize the through hole 440 to accommodate part of the fasteners, and can utilize the third step 450 to achieve structural limiting. Preferably, the third hole 441 and the fourth hole 442 can be coaxially arranged for easy molding.

[0049] like Figure 2 and Figure 3 As shown, the protective sleeve 400 has a through hole 440, and the through hole 440 has a third hole 441 and a fourth hole 442. In one embodiment of the present invention, the fastener can be a bolt 500, which can have a nut portion 510 and a screw portion 520. Specifically, the outer diameter of the nut portion 510 can be larger than the outer diameter of the screw portion 520, so that the nut portion 510 can be confined in the third step 450 in the through hole 440, and the screw portion 520 is connected to the beam 300. Through the above design, the present invention can achieve relative confinement of the bolt 500 in the protective sleeve 400 by utilizing the cooperation design of the third step 450 and the fourth step. In another embodiment, the fastener can also be a rivet.

[0050] In one embodiment of the present invention, the protective sleeve 400 and the positioning hole 110 can be connected by adhesive bonding. In some embodiments, the protective sleeve 400 and the positioning hole 110 can also adopt other types of connection methods, such as, but not limited to, welding or interference fit connection, and are not limited to this embodiment.

[0051] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, taking the bolt 500 as an example, the beam 300 may be provided with a threaded sleeve 310. Based on this, the top of the protective sleeve 400 can abut against the bottom of the threaded sleeve 310, and the bolt 500 is threaded into the threaded hole of the threaded sleeve 310. Through the above design, the present invention can utilize the threaded sleeve 310 as part of the beam 300 to achieve connection with the bolt 500, and allow the top of the protective sleeve 400 to indirectly abut against the beam 300 by abutting against the threaded sleeve 310.

[0052] like Figure 2 As shown, based on the design of the beam 300 with a threaded sleeve 310, in one embodiment of the present invention, a portion of the threaded sleeve 310 can be located inside the beam 300, and another portion of the threaded sleeve 310 can extend from the bottom of the beam 300 toward the protective sleeve 400, with the other portion abutting against the top of the protective sleeve 400. Through this design, the present invention can strengthen the connection between the two by utilizing the fact that a portion of the threaded sleeve 310 is located inside the beam 300, and can reduce the space occupied in the height direction.

[0053] like Figure 2 and Figure 3 As shown, based on the design where a portion of the threaded sleeve 310 is located inside the beam 300 and another portion extends towards the protective sleeve 400, in one embodiment of the present invention, a sealing element 600 can be sealingly provided between the protective sleeve 400 and the threaded sleeve 310. This sealing element 600 provides a sealing function between the protective sleeve 400 and the threaded sleeve 310. For example, in some embodiments, the sealing element 600 can be a sealing washer, which is fitted onto the bolt 500 and sandwiched between the protective sleeve 400 and the threaded sleeve 310. Through the above design, the present invention can further optimize the sealing performance of the battery pack using the sealing element 600. Optionally, the sealing element 600 can also be a sealant.

[0054] like Figure 2 and Figure 3 As shown, based on the design where part of the threaded sleeve 310 is located inside the beam 300 and another part extends towards the protective sleeve 400, in one embodiment of the present invention, the outer diameter of the portion of the threaded sleeve 310 extending out of the beam 300 can be larger than the outer diameter of the other portions of the threaded sleeve 310. Through this design, the present invention can utilize the larger outer diameter portion of the threaded sleeve 310 for the top of the protective sleeve 400 to abut, further improving structural stability. Simultaneously, the present invention can facilitate increasing the size of the sealing element 600 sandwiched between the threaded sleeve 310 and the protective sleeve 400, further improving sealing performance. Furthermore, the outer diameter of the portion of the threaded sleeve 310 extending out of the beam 300 can be designed to be larger than the width of the inner cavity of the beam 300, meaning that the outer diameter of this portion of the threaded sleeve 310 is not affected by the width of the inner cavity of the beam 300.

[0055] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, the battery pack proposed by the present invention may further include a buffer member 700. Specifically, the buffer member 700 is disposed between the bottom protective plate 100 and the bottom plate 200. Through the above design, the present invention can utilize the buffer member 700 to provide a buffering effect between the bottom protective plate 100 and the bottom plate 200, further improving the stability and reliability of the overall structure of the battery pack.

[0056] It should be noted that the battery packs shown in the accompanying drawings and described in this specification are merely a few examples among many battery packs from which the principles of the invention can be employed. It should be clearly understood that the principles of the invention are by no means limited to any detail or component of the battery packs shown in the accompanying drawings or described in this specification.

[0057] In summary, the battery pack proposed in this invention includes a base plate 200, a bottom protective plate 100, and a beam 300. The bottom protective plate 100 is located below the beam 300, and the base plate 200 is located between the bottom protective plate 100 and the beam 300. The bottom protective plate 100 has a positioning hole 110. The battery pack also includes a protective sleeve 400, a portion of which is disposed in the positioning hole 110 and connected to the bottom protective plate 100. The top of the protective sleeve 400 abuts against the beam 300. The beam 300, the bottom protective plate 100, and the protective sleeve 400 are connected by fasteners penetrating the protective sleeve 400. Through the above design, this invention can utilize the abutment design between the protective sleeve 400 and the beam 300 to further optimize the connection effect and improve the connection strength between the bottom protective plate 100 and the beam 300 while ensuring the reliability of the connection.

[0058] Exemplary embodiments of the battery pack proposed by the present invention have been described and / or illustrated in detail above. However, the embodiments of the present invention are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms “a,” “an,” and “the above” are used to indicate the presence of one or more elements / components / etc. The terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion and to mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc. Furthermore, the terms “first” and “second” in the claims and specification are used only as illustrative marks and are not intended to limit the numerical scope of the subject matter.

[0059] Although the battery pack proposed in this invention has been described according to different specific embodiments, those skilled in the art will recognize that modifications may be made to the implementation of this invention within the spirit and scope of the claims.

Claims

1. A battery pack, comprising a base plate, a bottom protective plate, and a beam, wherein the bottom protective plate is located below the beam, the base plate is located between the bottom protective plate and the beam, the bottom protective plate has a positioning hole, the battery pack further comprises a protective sleeve, a portion of the protective sleeve is disposed in the positioning hole and connected to the bottom protective plate, the top of the protective sleeve abuts against the beam, the beam, the bottom protective plate, and the protective sleeve are connected by a fastener penetrating the protective sleeve; the fastener is a bolt, the beam is provided with a threaded sleeve, the top of the protective sleeve abuts against the bottom of the threaded sleeve, and the bolt is screwed into the threaded hole of the threaded sleeve; the battery pack further comprises a buffer member disposed between the bottom protective plate and the base plate; wherein, The bottom protective plate is an extruded profile plate with an internal cavity. The positioning hole penetrates the cavity, and the protective sleeve seals the cavity. The bottom protective plate has an upper wall and a lower wall spaced apart from each other. The upper wall is closer to the bottom plate than the lower wall. The cavity is located between the upper wall and the lower wall. The positioning hole penetrates the upper wall and the lower wall. The positioning hole has a first hole and a second hole that are connected. The first hole penetrates the lower wall, and the second hole penetrates the upper wall. The diameter of the first hole is larger than the diameter of the second hole, so that the lower surface of the upper wall forms a first step at the periphery of the second hole.

2. The battery pack according to claim 1, characterized in that, The protective sleeve has a first part and a second part connected to each other, the second part being closer to the beam than the first part; wherein, a portion of the first part is disposed in the first hole, a portion of the second part is disposed in the second hole, and another portion of the second part extends out of the second hole and abuts against the beam; wherein, a second step is formed at the connection between the first part and the second part, and the second step is in a limiting engagement with the first step.

3. The battery pack according to claim 2, characterized in that, The protective sleeve has a through hole that penetrates the protective sleeve to accommodate the fastener; wherein, the through hole has a third hole and a fourth hole that are connected, the third hole penetrates the first part, the fourth hole penetrates the second part, and the diameter of the third hole is larger than that of the fourth hole so that a third step is formed at the connection between the third hole and the fourth hole.

4. The battery pack according to claim 3, characterized in that, The fastener is a bolt, which has a nut portion and a shank portion. The outer diameter of the nut portion is larger than the outer diameter of the shank portion. The nut portion is located on the third step, and the shank portion is connected to the beam.

5. The battery pack according to claim 1, characterized in that, The protective sleeve is connected to the positioning hole by means of adhesive bonding, welding, or interference fit.

6. The battery pack according to claim 1, characterized in that, A portion of the threaded sleeve is located inside the beam, and another portion extends from the bottom of the beam toward the protective sleeve and abuts against the top of the protective sleeve.

7. The battery pack according to claim 6, characterized in that, A sealing element is provided between the protective sleeve and the threaded sleeve.

8. The battery pack according to claim 6, characterized in that, The outer diameter of the portion of the threaded sleeve extending out of the beam is greater than the outer diameter of the other portions of the threaded sleeve.

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