Battery pack structure and electric tool power supply

Abstract

The utility model provides a battery pack structure and an electric tool power supply, the battery pack structure comprises an upper shell and a lower shell, a groove is arranged between the upper shell and the lower shell, a battery can be embedded in the groove in the radial direction and can be limited to move in the horizontal direction, the battery is arranged in the groove, and the upper shell and the lower shell are fixedly connected through a buckle or a fastener or a close-fitting structure. According to the utility model, the installation of the batteries in the battery pack structure is designed from the axial two-end installation into the radial installation of the batteries, and the upper cover and the lower cover which are installed in the radial direction only need to be designed into split molds in the aspect of mold design, so that compared with the traditional battery part mold which is installed in the axial direction and needs core-pulling design, the mold is simpler, and the production efficiency is improved. Therefore, the cost of the mold is reduced, the maintenance rate of the mold is low, and the battery pack is more convenient and quicker compared with the existing battery pack when the battery pack is assembled, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, in particular to a battery pack structure and an electric tool power supply. Background Art

[0002] At present, the batteries in the battery pack are fixed by respectively setting brackets at both ends of the battery. The brackets are provided with spaces for inserting the ends of the batteries. The brackets need to position both ends of the batteries when installing the batteries, so the efficiency of installing the batteries is low. In addition, the brackets have spaces for inserting the ends of the batteries, which requires the use of core-pulling molds when making the molds. The core-pulling molds have high production costs and high maintenance costs. For example, publication number CN105098289A discloses a safe battery pack structure that automatically adjusts the temperature. Both ends of the battery are provided with sleeve-like structures for inserting the batteries. The batteries correspond one to one when being installed, and the installation efficiency is low. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to design a battery pack structure so as to make the battery installation more convenient and quick.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A battery pack structure includes an upper shell and a lower shell. A groove is provided between the upper shell and the lower shell for radial embedding of the battery and limiting the horizontal movement of the battery. The battery is installed in the groove. The upper shell and the lower shell are fixedly connected by buckles, fasteners or a tight-fitting structure.

[0006] Preferably, the upper shell and the lower shell are buckled together by a buckle mechanism, and the buckle mechanism includes a clamping block arranged on the upper shell or the lower shell, and a clamping position for inserting and buckling the clamping block is arranged at a corresponding position on the lower shell or the upper shell.

[0007] Preferably, the clamping block is arranged at a raised portion between two adjacent grooves, and the clamping position is a clamping slot, and a hollow structure is provided on at least one side of the clamping slot so that the wall of the clamping slot has space for elastic deformation.

[0008] Preferably, the clamping block comprises a vertical plate arranged upright and a clamping portion arranged at the end of the vertical plate, the thickness of the clamping portion is greater than the thickness of the vertical plate and the width of the clamping slot, and both sides of the clamping portion are inclined or curved structures with a middle section protruding outward and two ends contracted.

[0009] Preferably, both ends of the groove of the upper shell and / or the lower shell have hollow structures for connecting electrode sheets.

[0010] Preferably, the upper shell and the lower shell are both integrally injection-molded from plastic material.

[0011] A power source for an electric tool is provided. The power source is equipped with a battery pack structure and further comprises a circuit board module and a cover. The cover is fixedly connected to a lower shell via fasteners.

[0012] The beneficial effects of the utility model are as follows: the utility model changes the installation of batteries in the battery pack structure from axial loading at both ends to radial loading of batteries. The radially loaded upper cover and lower cover only need to design a split mold in terms of mold design. Compared with the traditional axially loaded battery parts mold which requires a core pulling design, the mold is simpler, thereby reducing the cost of the mold and the mold maintenance rate is low. When assembling the battery pack, the present application is also more convenient and quicker than the existing battery pack, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the utility model;

[0014] Figure 2 It is a structural exploded view of the upper cover and the lower cover;

[0015] Figure 3 It is a three-dimensional diagram of the upper cover;

[0016] Figure 4 This is a three-dimensional diagram of the lower cover. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0018] See also Figure 1-Figure 4, as shown in the figure, a power supply of an electric tool is installed with a battery pack module, a circuit board module and a cover 1. The battery pack module includes a battery, an upper shell 2 and a lower shell 3. A groove 4 is provided between the upper shell 2 and the lower shell 3 for radially embedding multiple batteries and limiting the horizontal movement of the batteries. In this embodiment, an arc-shaped groove 4 is provided on both the upper shell 2 and the lower shell 3. The upper part of the battery is embedded in the groove 4 of the upper shell 2, and the lower part of the battery is embedded in the groove 4 of the lower shell 3. The upper shell 2 and the lower shell 3 are fixedly connected by a buckle or a fastener or a tight-fitting structure. In this embodiment, the batteries are connected in series through electrode sheets. In this embodiment, lips 31 matching the edge position of the cover 1 are provided at both ends of the groove 4 of the lower shell 3. After the lower shell 3 is connected to the cover 1, the lip 31 of the lower shell 3 coincides with the edge of the cover 1 to form a closed structure. The cover 1 is fixedly connected to the lower shell 3 by fasteners. Compared with the power supply of the existing electric tool, the lower shell 3 of the present application directly serves as the bottom shell of the outer shell, thereby reducing parts, reducing assembly processes and saving costs.

[0019] In this embodiment, the upper shell 2 and the lower shell 3 are buckled by a buckle mechanism, and the buckle mechanism includes a block 32 provided on the upper shell 2 or the lower shell 3, and a corresponding position 21 for the block 32 to be inserted and buckled is provided on the lower shell 3 or the upper shell 2. In this embodiment, the block 32 is provided on the lower shell 3, and the position 21 is provided on the upper shell 2. In this embodiment, the block 32 is provided at the raised part between two adjacent grooves 4, and the position 21 is a slot, and a hollow structure 22 is provided on at least one side of the slot, so that there is space for elastic deformation at the slot wall. The block 32 described in this embodiment includes a vertical plate arranged upright and a clamping portion 321 arranged at the end of the vertical plate. The vertical plate of this embodiment is arranged at the middle position of the raised part between two adjacent grooves 4 of the lower shell 3, and the length of the vertical plate is at least one-third of the width of the lower shell 3, so there is no need to set fasteners between the upper shell 2 and the lower shell 3, so as to ensure the connection strength between the upper shell 2 and the lower shell 3. The thickness of the clamping portion 321 is greater than the thickness of the vertical plate and the width of the clamping groove, and the two sides of the clamping portion 321 are inclined or curved structures with the middle section protruding outward and the two ends retracted. Both ends of the groove 4 of the upper shell 2 and / or the lower shell 3 described in this embodiment have a hollow structure for connecting the electrode sheet. The upper shell 2 and the lower shell 3 are both integrally injection molded by plastic material. In this embodiment, when the upper shell 2 and the lower shell 3 are buckled together, the vertical plate is inserted into the slot. Since the thickness of the clamping part 321 at the end of the vertical plate is greater than the width of the slot, the clamping part 321 will cause the slot wall to be squeezed and deformed toward the hollow structure on one side of the slot when it is inserted into the slot. When the clamping part 321 passes over the slot, the slot wall automatically returns to form a restricting structure that restricts the clamping part 321 from sliding out. The hollowing out of one side of the slot can also reduce material costs.

Claims

1. A battery pack structure, characterized in that: It includes an upper shell and a lower shell. A groove is provided between the upper shell and the lower shell for radial embedding of the battery and limiting the horizontal movement of the battery. The battery is installed in the groove. The upper shell and the lower shell are fixedly connected by buckles, fasteners or a tight-fitting structure.

2. A battery pack structure as claimed in claim 1, characterized in that: The upper shell and the lower shell are buckled together by a buckle mechanism, and the buckle mechanism includes a clamping block arranged on the upper shell or the lower shell, and a clamping position for inserting and buckling the clamping block is arranged at a corresponding position on the lower shell or the upper shell.

3. A battery pack structure as claimed in claim 2, characterized in that: The clamping block is arranged at the raised part between two adjacent grooves, and the clamping position is a clamping slot, and a hollow structure is arranged on at least one side of the clamping slot so that there is space for elastic deformation at the clamping slot wall.

4. A battery pack structure as claimed in claim 3, characterized in that: The clamping block includes a vertical plate arranged upright and a clamping portion arranged at the end of the vertical plate. The thickness of the clamping portion is greater than the thickness of the vertical plate and the width of the clamping slot, and the two sides of the clamping portion are inclined or curved structures with a middle section protruding outward and two ends contracted.

5. A battery pack structure according to any one of claims 1 to 4, characterized in that: Both ends of the groove of the upper shell and / or the lower shell have hollow structures for connecting electrode sheets.

6. A battery pack structure as claimed in claim 5, characterized in that: The upper shell and the lower shell are both integrally injection-molded from plastic material.

7. A power tool power supply, characterized in that: The power supply is installed with a battery pack structure as described in any one of claims 1 to 6, and also includes a circuit board module and a cover, and the cover is fixedly connected to the lower shell by fasteners.

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