Portable battery pack

Abstract

The utility model relates to the technical field of battery packs, and discloses a portable battery pack which comprises a shell and a battery cell assembly, the shell comprises a plastic shell and a first metal plate cover, the plastic shell is provided with a containing groove communicated with the outside, the first metal plate cover is detachably arranged on the plastic shell, and the first metal plate cover is detachably arranged on the containing groove. The first metal plate cover is arranged on the plastic shell and seals the accommodating groove, a second metal plate cover is detachably arranged on one side, deviating from the first metal plate cover, of the plastic shell, and the battery cell assembly is detachably arranged in the accommodating groove. The portable battery pack provided by the utility model is simple in structure, easy to install and high in safety.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs, and in particular relates to a lightweight battery pack. Background Art

[0002] The shell of a traditional battery pack is usually composed of a steel plate component and an aluminum alloy component, which makes the overall mass of the battery pack too heavy. This is particularly disadvantageous for electric vehicles, because a heavier battery pack will not only increase the overall weight of the vehicle, thereby affecting the cruising range, but also increase energy consumption and reduce efficiency. To this end, the prior art has developed a battery pack with a plastic shell and a rigid frame inside the shell. Although this design can reduce the overall weight of the battery pack to a certain extent, it still has obvious defects in practical applications. Specifically, the battery will generate a lot of heat during use. If the heat is not properly dissipated, it may cause overheating failure, which in turn poses a fire risk. The flame retardant properties of the plastic shell are poor and cannot effectively prevent the spread of the fire, which greatly reduces the safety of the battery pack. Utility Model Content

[0003] The purpose of the utility model is to provide a lightweight battery pack with simple structure, easy installation and high safety in view of the above problems in the prior art.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a lightweight battery pack, including an outer shell and a battery cell assembly, the outer shell includes a plastic shell and a first sheet metal cover, the plastic shell has a receiving groove connected to the outside, the first sheet metal cover is detachably provided on the plastic shell and forms a blockage for the receiving groove, and the plastic shell is detachably provided with a second sheet metal cover on the side away from the first sheet metal cover, and the battery cell assembly is detachably arranged in the receiving groove.

[0005] In the above-mentioned lightweight battery pack, the plastic shell includes an integrally formed bottom plate and side plates, the bottom plate is rectangular, and the side plates are hollow rectangular frames vertically connected to the bottom plate and cooperate with the bottom plate to form the accommodating groove.

[0006] In the above-mentioned lightweight battery pack, the bottom plate has a groove on the side away from the side plate, the groove is recessed towards the receiving groove and has a plurality of first connection structures, the second sheet metal cover is embedded in the groove and has a plurality of first mounting holes corresponding one-to-one with the first connection structures and forming a detachable connection.

[0007] In the above-mentioned lightweight battery pack, a plurality of the first connection structures are arranged along the circumference of the groove, each of the first connection structures is a cylinder with an internal thread, and the first connection structure and the first mounting hole are detachably connected by bolts.

[0008] In the above-mentioned lightweight battery pack, a limiting groove is further provided on the side of the bottom plate facing the first sheet metal cover, and a plurality of protrusions arranged in a matrix are provided in the limiting groove. When the battery cell assembly is installed in the accommodating groove, the protrusions form a snap connection with the battery cell assembly.

[0009] In the above-mentioned lightweight battery pack, an extension edge is provided on the side of the side plate facing away from the bottom plate, and the extension edge includes a first extension portion extending in a direction away from the center of the side plate, and a plurality of second connection structures are provided on the first extension portion. The battery cell assembly includes a sheet metal bracket detachably clamped on the first extension portion, and the sheet metal bracket has a plurality of second mounting holes corresponding one-to-one to the second connection structures and forming a detachable connection.

[0010] In the above-mentioned lightweight battery pack, the second connection structure includes a fixing portion with an internal thread, the fixing portion and the second mounting hole are detachably connected by bolts, and the second connection structure also includes a plurality of reinforcing ribs surrounding the outer wall of the fixing portion.

[0011] In the above-mentioned lightweight battery pack, the extended edge also includes a second extension portion connected to the first extension portion, a plurality of third connection structures are provided on the second extension portion, the first sheet metal cover has a plurality of fourth connection structures that are detachably connected to the third connection structures, and the first sheet metal cover has a wrapping edge that wraps the second extension portion.

[0012] In the above-mentioned lightweight battery pack, the battery cell assembly also includes a plastic fixing frame and a plurality of batteries, the plastic fixing frame is provided with a plurality of slots corresponding one-to-one to the batteries and forming a plug-in connection, and the plastic fixing frame is detachably connected to the sheet metal bracket.

[0013] In the above-mentioned portable battery pack, a mounting groove is further provided on the side of the bottom plate away from the accommodating groove, a hook structure is provided in the mounting groove, and one end of the hook structure is detachably located in the mounting groove, and the other end extends out of the mounting groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: by adopting a combination of a plastic shell and a first sheet metal cover as the outer shell of the battery pack, and providing a removable second sheet metal cover on the side of the plastic shell away from the first sheet metal cover; on the one hand, the overall weight of the battery pack is significantly reduced, avoiding the impact of the weight of the battery pack on other equipment; on the other hand, the flame retardant performance of the outer shell is improved, which can prevent the fire from spreading from the inside to the outside, and effectively improve the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic structural diagram of a lightweight battery pack according to an embodiment of the utility model.

[0016] Figure 2 It is an exploded view of a lightweight battery pack according to an embodiment of the present utility model.

[0017] Figure 3 for Figure 2 Schematic diagram of the structure from another perspective.

[0018] Figure 4 It is a schematic diagram of the structure of the plastic shell in the embodiment of the utility model.

[0019] In all the drawings, the same reference numerals represent the same technical features, specifically: 100, plastic shell; 101, accommodating groove; 110, bottom plate; 111, groove; 112, limiting groove; 113, protrusion; 114, mounting groove; 120, side plate; 121, first extension portion; 122, second extension portion; 200, first sheet metal cover; 210, fourth connecting structure; 220, edging; 300, second sheet metal cover; 310, first mounting hole; 400, battery cell assembly; 410, sheet metal bracket; 411, second mounting hole; 420, plastic fixing frame; 421, slot; 430, battery; 500, hook structure; 600, first connecting structure; 610, second connecting structure; 611, fixing portion; 612, reinforcing rib; 620, third connecting structure. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] like Figures 1 to 4As shown, a portable battery pack includes a shell and a battery cell assembly 400. The shell includes a plastic shell 100 and a first sheet metal cover 200. The plastic shell 100 has a receiving groove 101 connected to the outside. The first sheet metal cover 200 is detachably arranged on the plastic shell 100 and blocks the receiving groove 101. The second sheet metal cover 300 is detachably arranged on the side of the plastic shell 100 away from the first sheet metal cover 200. The battery cell assembly 400 is detachably arranged in the receiving groove 101. This design not only effectively reduces the overall weight of the battery pack, but also improves the flame retardant performance of the shell, avoids the fire from spreading outward when the two ends of the internal battery 430 catch fire, and effectively improves the safety of the battery pack.

[0023] Specifically, if Figures 1 to 4 As shown, in this embodiment, the battery pack is mainly composed of a shell, a second sheet metal cover 300 , a battery cell assembly 400 and a hook structure 500 .

[0024] In this embodiment, the shell includes a plastic shell 100 and a first sheet metal cover 200. The plastic shell 100 is in a rectangular box shape and has a receiving groove 101 connected to the outside for placing the battery cell assembly 400. The first sheet metal cover 200 is rectangular and is detachably arranged on the plastic shell 100. Its size is adapted to the receiving groove 101, and it forms a blockage for the receiving groove 101, and together with the plastic shell 100, it forms a closed space for accommodating the battery cell assembly 400. Compared with the traditional all-sheet metal shell design, this design effectively reduces the overall weight of the battery pack and avoids the weight of the battery pack from affecting the operation of other equipment; at the same time, compared with the all-plastic shell design, this design effectively improves the flame retardancy of the shell, thereby ensuring the safety of the battery pack. In general, this design reduces the overall weight of the battery pack while ensuring the safety of the battery pack.

[0025] To further improve the flame retardant performance of the shell, in this embodiment, the second sheet metal cover 300 is detachably provided on the side of the plastic shell 100 away from the first sheet metal cover 200. This design allows the corresponding positions of both ends of the battery 430 to be protected by sheet metal covers, and no matter which end of the battery 430 catches fire, the spread of the fire can be suppressed, further effectively improving the safety of the battery pack.

[0026] In this embodiment, the plastic housing 100 includes an integrally formed bottom plate 110 and a side plate 120. The bottom plate 110 is rectangular, and the side plate 120 is a hollow rectangular frame, which is vertically connected to the bottom plate 110 and cooperates with the bottom plate 110 to form a receiving groove 101. The integrally formed design effectively reduces the connection seam between the bottom plate 110 and the side plate 120, thereby reducing the risk of moisture and dust entering the battery pack and enhancing the protection level of the battery pack; on the other hand, it reduces the number of components and processes required for assembly and reduces production costs.

[0027] In this embodiment, the bottom plate 110 has a rectangular groove 111 on the side away from the side plate 120, the groove 111 is concave toward the receiving groove 101, and has a plurality of first connection structures 600. The second sheet metal cover 300 is embedded in the groove 111, and its size is adapted to the groove 111, and has a plurality of first mounting holes 310 corresponding to the first connection structures 600 and forming a detachable connection. This design not only improves the convenience of disassembly and assembly of the second sheet metal cover 300, but also ensures the flatness of the bottom of the battery pack.

[0028] In this embodiment, a plurality of first connection structures 600 are evenly arranged along the circumference of the groove 111 to achieve even multi-point connection with the second sheet metal cover 300, wherein each first connection structure 600 is a cylinder with internal threads, and each first connection structure 600 is detachably connected to the first mounting hole 310 by bolts. This design provides a stable and easily detachable connection between the second sheet metal cover 300 and the base plate 110, ensuring reliability for long-term use, while also simplifying the assembly process.

[0029] In this embodiment, the bottom plate 110 is further provided with a limiting groove 112 on the side facing the first sheet metal cover 200, and the limiting groove 112 has a plurality of protrusions 113 arranged in a matrix, and when the battery cell assembly 400 is installed in the receiving groove 101, the plurality of protrusions 113 are engaged with the battery cell assembly 400. This design can prevent the battery 430 from moving in the battery pack, thereby improving the safety of the battery pack and reducing the risk of damage to the battery 430 caused by vibration.

[0030] Preferably, in this embodiment, the protrusion 113 and the bottom plate 110 are integrally injection molded, and there is a gap between two adjacent protrusions 113, and the gap is adapted to the size of the battery 430. This design effectively saves a fixing frame for fixing the battery 430, so that the battery cell assembly 400 only needs to design a fixing frame at the other end of the battery 430, effectively reducing the installation process of the battery cell assembly 400, thereby improving the installation efficiency of the battery cell assembly 400.

[0031] In this embodiment, a mounting groove 114 is further provided on the side of the bottom plate 110 away from the receiving groove 101, and a hook structure 500 is provided in the mounting groove 114, wherein one end of the hook structure 500 is detachably disposed in the mounting groove 114, and the other end extends out of the mounting groove 114. This design provides an additional fixing option for the battery pack, such as hanging on other equipment or on a wall, so that users can choose different installation methods according to their needs, effectively improving the applicability and portability of the battery pack.

[0032] In this embodiment, an extension edge is provided on the side of the side plate 120 away from the bottom plate 110, and the extension edge includes a first extension portion 121 extending in a direction away from the center of the side plate 120, and a plurality of second connection structures 610 are provided on the first extension portion 121. The battery cell assembly 400 includes a sheet metal bracket 410 detachably mounted on the first extension portion 121, and the sheet metal bracket 410 has a plurality of second mounting holes 411 corresponding to the second connection structures 610 and forming a detachable connection. This design realizes multi-point connection between the battery cell assembly 400 and the plastic shell 100, effectively ensures the reliability of the connection between the battery cell assembly 400 and the plastic shell 100, and improves the convenience of operation when installing the battery cell assembly 400.

[0033] Preferably, in this embodiment, the first extension portion 121 is arranged along the circumference of the side plate 120, and the second connection structure 610 is arranged along the length direction of the first extension portion 121. This design effectively improves the strength of the plastic housing 100 and further ensures the stability and reliability of the connection between the battery cell assembly 400 and the plastic housing 100.

[0034] It is worth noting that when the battery cell assembly 400 is installed in the accommodating groove 101, there is a gap between the side plate 120 and the battery cell assembly 400, which can effectively isolate the battery cell assembly 400 from the side plate 120 to prevent the side plate 120 from deforming or catching fire when the battery 430 heats up.

[0035] In this embodiment, the second connection structure 610 includes a fixing portion 611 with an internal thread, and the fixing portion 611 is detachably connected to the second mounting hole 411 by bolts. Preferably, the fixing portion 611 is cylindrical, and the second connection structure 610 also includes a plurality of reinforcing ribs 612 surrounding the outer wall of the fixing portion 611. This design enhances the mechanical strength of the fixing portion 611, prevents the second connection structure 610 from being deformed or broken when subjected to external force, further ensures the stability of the battery cell assembly 400 after installation, and makes the entire battery pack more durable.

[0036] In this embodiment, the extended edge also includes a second extended portion 122 connected to the first extended portion 121, a plurality of third connecting structures 620 are provided on the second extended portion 122, the first sheet metal cover 200 has a plurality of fourth connecting structures 210 detachably connected to the third connecting structures 620, and the first sheet metal cover 200 has a wrapping edge 220 that wraps the second extended portion 122. This design not only enhances the connection strength between the first sheet metal cover 200 and the plastic housing 100, but also improves the overall aesthetics of the product.

[0037] Preferably, in this embodiment, the second extension portion 122 is arranged along the length direction of the first extension portion 121 and is integrally injection molded with the first extension portion 121. A plurality of third connection structures 620 are evenly arranged along the length direction of the second extension portion 122. Each third connection structure 620 is a hollow boss structure. The fourth connection structure 210 is a cylinder with internal threads and is connected to the first sheet metal cover 200 by riveting. This design not only further ensures the connection strength and stability between the first sheet metal cover 200 and the plastic shell 100, but also makes the front of the first sheet metal cover 200 flat and free of traces of mounting holes, effectively improving the aesthetics of the battery pack.

[0038] In this embodiment, the cell assembly 400, as the core component of the battery pack, is detachably arranged in the receiving groove 101, and includes a plastic fixing frame 420, a plurality of batteries 430, and a sheet metal bracket 410, wherein the plastic fixing frame 420 is provided with a plurality of slots 421 corresponding to the batteries 430 one by one and forming a plug-in connection, and the plastic fixing frame 420 and the sheet metal bracket 410 are detachably connected. The design of the plastic fixing frame 420 enables, after the cell assembly 400 is installed in the receiving groove 101, one end of the battery 430 is inserted into the gap between the adjacent protrusions 113, and the other end is inserted into the slot 421, thereby preventing the battery 430 from moving during the use of the battery pack, effectively ensuring the stability of the battery pack operation, and also meeting the insulation requirements of the battery 430. The design of the sheet metal bracket 410 improves the strength of the battery cell assembly 400 while ensuring the convenience of connection between the battery cell assembly 400 and the plastic shell 100, and can also suppress the fire at the end of the battery 430 to a certain extent. It effectively improves the flame retardant performance of the shell by cooperating with the first sheet metal cover 200.

[0039] Preferably, in this embodiment, the plastic fixing frame 420 and the sheet metal bracket 410 are detachably connected by bolts.

[0040] It should be noted that in the present utility model, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0041] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A lightweight battery pack, characterized in that: It includes a shell and a battery cell assembly, the shell includes a plastic shell and a first sheet metal cover, the plastic shell has a receiving groove connected to the outside, the first sheet metal cover is detachably arranged on the plastic shell and forms a blockage for the receiving groove, and the plastic shell is detachably provided with a second sheet metal cover on the side away from the first sheet metal cover, and the battery cell assembly is detachably arranged in the receiving groove.

2. A lightweight battery pack according to claim 1, characterized in that: The plastic shell includes an integrally formed bottom plate and side plates, the bottom plate is rectangular, and the side plates are hollow rectangular frames, which are vertically connected to the bottom plate and cooperate with the bottom plate to form the accommodating groove.

3. A lightweight battery pack according to claim 2, characterized in that: The bottom plate has a groove on the side away from the side plate, the groove is recessed toward the receiving groove and has a plurality of first connection structures, the second sheet metal cover is embedded in the groove and has a plurality of first mounting holes corresponding to the first connection structures one by one and forming a detachable connection.

4. A lightweight battery pack according to claim 3, characterized in that: A plurality of the first connection structures are arranged along the circumference of the groove, each of the first connection structures is a cylinder with an internal thread, and the first connection structure and the first mounting hole are detachably connected via bolts.

5. A lightweight battery pack according to claim 2, characterized in that: A limiting groove is further provided on the side of the bottom plate facing the first sheet metal cover, and a plurality of protrusions arranged in a matrix are provided in the limiting groove. When the battery cell assembly is installed in the accommodating groove, the protrusions are snap-fitted with the battery cell assembly.

6. A lightweight battery pack according to claim 2, characterized in that: An extension edge is provided on the side of the side panel facing away from the bottom panel, and the extension edge includes a first extension portion extending in a direction away from the center of the side panel, and a plurality of second connection structures are provided on the first extension portion. The battery cell assembly includes a sheet metal bracket detachably clamped on the first extension portion, and the sheet metal bracket has a plurality of second mounting holes corresponding one-to-one to the second connection structures and forming a detachable connection.

7. A lightweight battery pack according to claim 6, characterized in that: The second connection structure includes a fixing portion with an internal thread, the fixing portion and the second mounting hole are detachably connected via bolts, and the second connection structure also includes a plurality of reinforcing ribs surrounding an outer wall of the fixing portion.

8. The portable battery pack according to claim 6, characterized in that: The extended edge also includes a second extension portion connected to the first extension portion, a plurality of third connection structures are provided on the second extension portion, the first sheet metal cover has a plurality of fourth connection structures that are detachably connected to the third connection structures, and the first sheet metal cover has a cladding that covers the second extension portion.

9. The portable battery pack according to claim 6, characterized in that: The battery core assembly also includes a plastic fixing frame and a plurality of batteries. The plastic fixing frame is provided with a plurality of slots corresponding to the batteries one by one and forming a plug-in connection, and the plastic fixing frame is detachably connected to the sheet metal bracket.

10. A lightweight battery pack according to claim 2, characterized in that: A mounting groove is further provided on one side of the bottom plate away from the accommodating groove. A hook structure is provided in the mounting groove, and one end of the hook structure is detachably located in the mounting groove, and the other end extends out of the mounting groove.

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