Battery pack end cover injection mold and battery pack

Abstract

The utility model relates to a battery pack end cover injection mold and a battery pack, the battery pack comprises a battery pack end cover and a reinforcer connected to the battery pack end cover, and the reinforcer is embedded into the battery pack end cover through the battery pack end cover injection mold; the battery pack end cover is provided with a receding groove penetrating through the battery pack end cover in the height direction, the receding groove is matched with a positioning block of a battery pack end cover injection mold in shape, and at least part of the reinforcing piece is exposed out of the receding groove. According to the battery pack end cover injection mold, the positioning block is designed on the battery pack end cover injection mold, so that the reinforcer is limited, the structure is simple, the reinforcer can be effectively prevented from moving or deviating, and the phenomenon of mold collision or glue overflowing in the injection molding process is avoided.

Description

[Technical Field]

[0001] This utility model relates to a battery pack end cap injection mold, and more particularly to a battery pack formed by injection molding using a battery pack end cap injection mold. [Background Technology]

[0002] Existing battery packs are generally installed in conjunction with electrical equipment via a sliding track. The sliding track of the battery pack usually bears the weight of the entire battery pack. When the electrical equipment generates significant vibration during operation, the sliding track of the battery pack will experience severe wear. Even worse, when the electrical equipment containing the battery pack is dropped, the sliding track of the battery pack may tear.

[0003] To address the issue of easy damage to the slide groove, reinforcements are typically added to the slide groove of the battery pack to increase wear resistance and structural strength. However, due to improper placement and / or positioning of the reinforcements during injection molding, overflow of glue often occurs at the joint between the reinforcements and the battery pack end cap, or the slider of the injection mold may collide with the reinforcement.

[0004] Therefore, it is indeed necessary to provide an improved battery pack end cap injection mold and battery pack to overcome the defects of the existing technology. [Summary of the Invention]

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a battery pack end cap injection mold and battery pack with a simple structure and a firm fixation.

[0006] The present invention solves the existing technical problems by adopting the following technical solution: a battery pack end cap injection mold for embedding a reinforcing member into the battery pack end cap of the battery pack. The battery pack end cap injection mold includes a fixed mold and a moving mold connected to the fixed mold, a first slider and a second slider. The fixed mold, the moving mold, the first slider and the second slider surround to form an injection cavity. After the injection liquid flows into the injection cavity, it solidifies to form the battery pack end cap. The fixed mold has a contour body adapted to the inner wall of the battery pack end cap and a positioning member protruding upward from the end face of the contour body. The reinforcing member is installed on the positioning member.

[0007] A further improvement is as follows: the reinforcing member has a first reinforcing portion connected to the fixed mold, and a second and third reinforcing portions connected to the first or second slider. The first reinforcing portion is parallel to the second reinforcing portion, and the first reinforcing portion is perpendicular to the third reinforcing portion.

[0008] A further improvement is that the reinforcing member also has a positioning hole that penetrates the first reinforcing portion, and the positioning hole is sleeved on the outer periphery of the positioning member.

[0009] A further improvement is as follows: the first reinforcing part is embedded inside the end cap of the battery pack, the positioning member has a limiting part connected to the contour body, the diameter of the limiting part gradually decreases along the direction away from the contour body, and the positioning hole is sleeved on the outer periphery of the limiting part.

[0010] A further improvement is that the inner diameter of the positioning hole is greater than the minimum outer diameter of the limiting part, but not greater than the maximum outer diameter of the limiting part.

[0011] A further improvement is as follows: the first slider has an outer contour body adapted to the outer side wall of the battery pack end cover and a slide rail protruding from the side wall of the outer contour body toward the third reinforcing portion, the side wall of the slide rail abutting against the third reinforcing portion.

[0012] A further improvement is that the first slider also has a positioning block that protrudes from the lower end face of the outer contour body toward the second reinforcing part, and the lower end face of the positioning block abuts against the upper end face of the second reinforcing part.

[0013] A further improvement is as follows: the positioning block has a first step portion connected to the slide rail, a second step portion connected to the first step portion, and a step groove located between the first step portion and the second step portion, with at least a portion of the second reinforcing portion being received within the step groove.

[0014] A further improvement is that the positioning block also has a step angle formed at the end of the second step portion, the step angle being used to support the movement of the first slider.

[0015] The present invention can also solve the problems of the prior art by adopting the following technical solution: a battery pack, including a battery pack end cover and a reinforcing member connected to the battery pack end cover, wherein the reinforcing member is embedded in the battery pack end cover via a battery pack end cover injection mold; the battery pack end cover has a clearance groove that penetrates the battery pack end cover along the height direction, the clearance groove is adapted to the shape of the positioning block of the battery pack end cover injection mold, and at least part of the reinforcing member is exposed in the clearance groove.

[0016] Compared with the prior art, the present invention has the following advantages: positioning parts, slide rails and positioning blocks are designed on the injection mold of the battery pack end cover, so as to limit the reinforcing parts in all directions. The structure is simple and can effectively prevent the reinforcing parts from moving or deviating, and avoid the occurrence of mold collision or glue overflow during the injection process. [Attached Image Description]

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0018] Figure 1This is a schematic diagram of the structure of the battery pack of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the injection mold for the battery pack end cap of this utility model;

[0020] Figure 3 yes Figure 2 A schematic diagram of the structure of the fixed mold in the battery pack end cap injection mold shown;

[0021] Figure 4 yes Figure 3 A magnified view of a portion of the fixed mold shown;

[0022] Figure 5 yes Figure 2 The diagram shows the structure of the first slider in the injection mold of the battery pack end cap.

[0023] Figure 6 yes Figure 5 A magnified view of a portion of the first slider shown;

[0024] Figure 7 yes Figure 1 The diagram shows the structure of the reinforcing component in the battery pack.

Detailed Implementation Methods

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," "rear," "left," and "right," which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0027] Please see Figure 1 As shown, the embodiments of this utility model relate to a battery pack, commonly referred to as a "secondary battery," which can be installed in various cordless electrical devices. Cordless electrical devices can be electric work machines powered by motors, such as drills, lawnmowers, and hair dryers, or electrical devices without motors, such as lights, radios, and speakers. Alternatively, the electrical device can also be a charging device that supplies power to the battery pack.

[0028] The electrical equipment includes a battery pack mounting section, and the battery pack can be mounted on the battery pack mounting section by sliding it relative to the battery pack mounting section in a predetermined sliding direction. In this embodiment, the direction in which the battery pack slides when it is installed on the battery pack mounting section is called the rearward direction; the direction in which the battery pack slides when it is removed from the battery pack mounting section is called the forward direction. Furthermore, when viewed from the front of the battery pack with it mounted on the battery pack mounting section, the direction in which the battery pack mounting section is located is called the upward direction, and the direction opposite to the upward direction is called the downward direction. The direction orthogonal to the forward / reverse direction and the upward / downward direction is called the left / right direction.

[0029] In this embodiment, the battery pack 1000 includes: a housing, a bracket installed within the housing, a circuit board, a battery pack, and an operating member 106 movably installed in the housing. A plug-in port 105 is formed at the upper end of the housing. The battery pack 1000 can be detachably installed to the battery pack mounting portion of an electrical device or charging device via the operating member 106 along the extending direction of the plug-in port 105. A plug-in portion 106b and an operating portion 106a are formed on the outer side of the top wall of the housing. Pressing the operating portion 106a switches the connection state of the operating portion 106a. Furthermore, the operating portion 106a is closer to the front end of the housing than the plug-in portion 106b.

[0030] The aforementioned housing can be made of plastic or other composite materials by injection molding, etc. It has a battery pack end cap 101 and a battery pack housing 104 and a receiving space formed between the battery pack end cap 101 and the battery pack housing 104. The battery pack is installed in the receiving space. The battery pack end cap 101 and the battery pack housing 104 are configured as upper and lower covers, wherein the battery pack end cap 101 is the upper housing and the battery pack housing 104 is the lower housing. The upper housing and the lower housing can be provided with a matching structure for positioning, and the two are tightly connected by screws.

[0031] Specifically, the battery pack end cap 101 is injection molded by the battery pack end cap injection mold 100. In order to strengthen the structural strength of the battery pack end cap, the reinforcing member 102 can be embedded in the battery pack end cap 101 through the battery pack end cap injection mold 100, that is, the reinforcing member 102 is assembled onto the battery pack end cap injection mold 100 so that the reinforcing member 102 is embedded in the cured battery pack end cap 101.

[0032] Combination Figures 2 to 7As shown, the battery pack end cap injection mold 100 includes a fixed mold 1 and a movable mold 2, a first slider 3, and a second slider 4 connected to the fixed mold 1. The fixed mold 1 is adapted to the inner wall shape of the battery pack end cap 101, the movable mold 2 is adapted to the upper end face shape of the battery pack end cap 101, the first slider 3 is adapted to the left side wall shape of the battery pack end cap 101, and the second slider 4 is adapted to the right side wall shape of the battery pack end cap 101. The fixed mold 1, the movable mold 2, the first slider 3, and the second slider 4 form an injection cavity. When the injection liquid of plastic or other composite materials flows into the injection cavity 5, after a certain curing time, the battery pack end cap 101 will be formed.

[0033] To simplify the assembly process, a reinforcing member 102 is installed inside the battery pack injection mold 100 between the injection molding of the battery pack end cap 101. Specifically, the reinforcing member 102 has a first reinforcing portion 102a connected to the fixed mold 1, a second reinforcing portion 102b connected to the first slider 3 or the second slider 4, and a third reinforcing portion 103c. The first reinforcing portion 102a is parallel to the second reinforcing portion 102b, and the first reinforcing portion 102b is perpendicular to the third reinforcing portion 102c. Typically, one reinforcing member 102 is provided on each of the left and right sides of the battery pack end cap 101 to ensure its structural strength and wear resistance.

[0034] In this embodiment, the fixed mold 1 has a contour body 11 adapted to the inner wall of the battery pack end cap 101 and a positioning member 12 protruding upward from the end face of the contour body 11. A reinforcing member 102 is installed on the outer periphery of the positioning member 12. The reinforcing member 102 has a positioning hole 103 penetrating the first reinforcing portion 102a. The positioning hole 103 is fitted onto the outer periphery of the positioning member 12, and the number of positioning members 12 is the same as the number of positioning holes 103. Specifically, two, three, or four positioning holes 103 can be provided on the reinforcing member 102 to better restrict the movement of the reinforcing member 102 in the left and right directions and prevent it from shifting during the mold assembly process.

[0035] The first reinforcing part 102a is embedded in the inner wall of the battery pack end cover 101, so that the reinforcing member 102 is firmly connected to the battery pack end cover 101. The positioning member 12 has a limiting part 121 connected to the contour body 11. The diameter of the limiting part 121 gradually decreases in the direction away from the contour body 11. Preferably, the limiting part 121 is approximately conical. The positioning hole 103 is sleeved on the outer periphery of the limiting part 121. At the same time, the inner diameter of the positioning hole 103 is larger than the minimum outer diameter of the limiting part 121, but not larger than the maximum outer diameter of the limiting part 121, so that there is a gap between the first reinforcing part 102a and the battery pack end cover 101. During the injection molding process, the injection molding liquid will flow into the gap between the two, and the first reinforcing part 102a is embedded inside the battery pack end cover 101 to strengthen the structural strength of its area.

[0036] Furthermore, when assembling the first slider 3 and / or the second slider 4 to the fixed mold 1, positioning blocks 33 are designed on the first slider 3 and the second slider 4 to prevent them from impacting the reinforcing member 102. The first slider 3 and the second slider 4 are arranged approximately symmetrically, with the first slider 3 as an example.

[0037] In this embodiment, the first slider 3 has an outer contour body 31 adapted to the outer side wall of the battery pack end cover 101, a slide rail 32 protruding from the side wall of the outer contour body 31 toward the third reinforcing portion 102c, and a positioning block 33 protruding from the lower end face of the outer contour body 31 toward the second reinforcing portion 102b. The side wall of the slide rail 32 abuts against the third reinforcing portion 102c, further limiting the reinforcing member 102 in the left-right direction, and exposing the third reinforcing portion 102c to the battery pack end cover 101. The metal third reinforcing portion 102c can reduce wear on the battery pack end cover 101 at this position. At the same time, the lower end face of the positioning block 33 abuts against the upper end face of the second reinforcing portion 102b, for limiting the reinforcing member 102 in the up-down direction.

[0038] Specifically, the positioning block 33 has a first step portion 331 connected to the slide rail 32, a second step portion 332 connected to the first step portion 331, a step groove 333 located between the first step portion 331 and the second step portion 332, and a step angle 334 formed at the end of the second step portion 332. At least the second reinforcing portion 102b is received within the step groove 333, so that the first slider 3 presses against the reinforcing member 102. In addition, the step angle 334 is a chamfered right angle or a rounded corner, which is used to assist in supporting the movement of the first slider 3 and prevent the first slider 3 from colliding with the reinforcing member 102.

[0039] The reinforcing member 102 is installed on the limiting portion 121 of the fixed mold 1. Then, the first slider 3 and the second slider 4 are installed on the fixed mold 1. The slide rail 32 and the positioning block 33 press against the reinforcing member 102. Then, the moving mold 2 is installed on the fixed mold 1 to form a complete injection cavity. After the injection liquid is injected, it will solidify to form a battery pack end cap 101 with the reinforcing member 102. At the same time, in order to accommodate the positioning block 33, the battery pack end cap 101 will have a clearance groove that penetrates the battery pack end cap 101 along the height direction. The clearance groove is adapted to the shape of the positioning block 33, and at least part of the reinforcing member 102 is exposed in the clearance groove.

[0040] This utility model designs a positioning element 12, a slide rail 32 and a positioning block 33 on the battery pack end cap injection mold 100, thereby limiting the reinforcing element 102 in all directions and preventing the reinforcing element 102 from moving or being offset.

[0041] This utility model is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many other alternative solutions exist for the power tool of this utility model without departing from the principles and scope of this utility model. The scope of protection of this utility model is determined by the claims.

Claims

1. A battery pack end cap injection mold for embedding a reinforcing member into the battery pack end cap of a battery pack, the battery pack end cap injection mold comprising a fixed mold and a movable mold connected to the fixed mold, a first slider and a second slider, the fixed mold, the movable mold, the first slider and the second slider forming an injection cavity, wherein injection liquid flows into the injection cavity and solidifies to form the battery pack end cap; characterized in that: The fixed mold has a contoured body adapted to the inner wall of the battery pack end cover and a positioning member protruding upward from the end face of the contoured body, and the reinforcing member is installed on the positioning member.

2. The battery pack end cap injection mold according to claim 1, characterized in that: The reinforcing member has a first reinforcing portion connected to the fixed mold, and a second and third reinforcing portions connected to the first or second slider. The first reinforcing portion is parallel to the second reinforcing portion and perpendicular to the third reinforcing portion.

3. The battery pack end cap injection mold according to claim 2, characterized in that: The reinforcing member also has a positioning hole that penetrates the first reinforcing portion, and the positioning hole is fitted around the outer periphery of the positioning member.

4. The battery pack end cap injection mold according to claim 3, characterized in that: The first reinforcing portion is embedded inside the end cap of the battery pack. The positioning member has a limiting portion connected to the contour body. The diameter of the limiting portion gradually decreases in the direction away from the contour body. The positioning hole is sleeved on the outer periphery of the limiting portion.

5. The battery pack end cap injection mold according to claim 4, characterized in that: The inner diameter of the positioning hole is greater than the minimum outer diameter of the limiting portion, but not greater than the maximum outer diameter of the limiting portion.

6. The battery pack end cap injection mold according to claim 2, characterized in that: The first slider has an outer contour body adapted to the outer side wall of the battery pack end cap and a slide rail protruding from the side wall of the outer contour body toward the third reinforcing portion, the side wall of the slide rail abutting against the third reinforcing portion.

7. The battery pack end cap injection mold according to claim 6, characterized in that: The first slider also has a positioning block that protrudes from the lower end face of the outer contour body toward the second reinforcing portion, the lower end face of the positioning block abutting against the upper end face of the second reinforcing portion.

8. The battery pack end cap injection mold according to claim 7, characterized in that: The positioning block has a first step portion connected to the slide rail, a second step portion connected to the first step portion, and a step groove located between the first step portion and the second step portion, with at least a portion of the second reinforcing portion being received within the step groove.

9. The battery pack end cap injection mold according to claim 8, characterized in that: The positioning block also has a step angle formed at the end of the second step portion, the step angle being used to support the movement of the first slider.

10. A battery pack, comprising a battery pack end cap and a reinforcing member connected to the battery pack end cap, the reinforcing member being embedded in the battery pack end cap via an injection mold; characterized in that: The battery pack end cap has a clearance groove extending through the battery pack end cap along the height direction. The clearance groove is adapted to the shape of the positioning block of the battery pack end cap injection mold, and at least part of the reinforcement is exposed in the clearance groove.

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