Battery box body and battery pack

Abstract

The utility model discloses a battery box body and a battery pack. The battery box body comprises a shell, an insert and a handle, the shell is made of plastic; the insert is made of metal, one part of the insert is connected with the shell in an injection molding mode, and the other part of the insert is exposed out of the shell. The handle is connected with the insert and used for being held by a user. According to the utility model, the plastic shell and the metal insert are injection-molded together and are completely fused into a whole, and other fasteners for locking the insert and the shell together are not needed, so that a fastener for connecting the insert and the shell together is omitted, the insert can be connected with the shell together under the condition of shorter length, and the service life of the insert is prolonged. The mounting space of the insert is reduced; in addition, no gap exists between the shell and the insert, so that the sealing problem is avoided, and external dust and water vapor are prevented from entering the battery box body.

Description

Technical Field

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

[0002] There are a large number of handle designs for battery packs on the market, but most of them require a large handle installation space to place fasteners to lock the handle to the shell. For some designs with limited storage space, the handle is often omitted as a second choice, which will greatly affect the user experience of the product. Utility Model Content

[0003] One purpose of the utility model is to provide a battery box and a battery pack, which are intended to solve the technical problem of large handle installation space.

[0004] To achieve the above-mentioned purpose, the utility model provides a solution: a battery box, which includes a shell, an insert and a handle; the shell is made of plastic; the insert is made of metal, a part of the insert is injection-molded with the shell, and the other part of the insert is exposed from the shell; the handle is connected to the insert, and the handle is used for the user to hold.

[0005] Optionally, the insert includes a first portion and a second portion, the first portion is located in the shell and is injection-moldedly connected to the shell, and the second portion is connected to the first portion and exposed to the shell.

[0006] Optionally, the second portion is bent relative to the first portion, and an arc transition structure is provided at the connection between the first portion and the second portion.

[0007] Optionally, an outer surface of the shell connected to the first part is an outer standard surface, the first part is parallel to the outer standard surface, and the second part is perpendicular to the outer standard surface.

[0008] Optionally, the first portion is provided with a limiting opening, and part of the material of the shell is filled in the limiting opening.

[0009] Optionally, the surface of the first portion is provided with a plurality of pits, and / or the surface of the first portion is provided with a plurality of protrusions.

[0010] Optionally, the inner surface of the shell connected to the first part is an inner standard surface, the outer surface of the shell connected to the first part is an outer standard surface, the first part is parallel to the outer standard surface and the inner standard surface respectively, and the distance between the first part and the outer standard surface is greater than the distance between the first part and the inner standard surface.

[0011] Optionally, the second part is provided with an installation opening, the handle is passed through the installation opening, and the end of the second part away from the first part is provided with a notch connected to the installation opening, the width of the notch is D1, the width of the installation opening is D2, 8≤D2 / D1≤20; the handle is a flexible band, the handle is flexible, the wall thickness of the handle is D3, and D3≤D1.

[0012] Optionally, a receiving groove is provided in a region of the shell connected to the first part, and at least a portion of the second part is sunk into the receiving groove.

[0013] In order to achieve the above-mentioned object, the utility model provides a solution: a battery pack, which includes: a plurality of batteries and a battery box as described in any one of the above items, and the plurality of batteries are assembled in a plurality of battery boxes.

[0014] The beneficial effects of the utility model are:

[0015] The battery box includes a shell, an insert and a handle. The shell is made of plastic, which can be polycarbonate (PC), polystyrene (PS), etc. The shell made of plastic is easy to be formed into various complex shapes, making it more convenient to install various parts of the battery pack; the insert is made of metal, which can be iron, copper, aluminum, etc. The metal insert is hard and not easy to break. One part of the insert is injection-molded with the shell, and the other part of the insert is exposed to the shell; the handle is connected to the insert, and the handle is used for the user to hold and lift the shell.

[0016] The shell is made of plastic material, so it can be molded into various complex shapes, which makes it easier to install the various parts of the battery pack; the insert is made of metal material, which can be iron, copper, aluminum, etc. The metal insert is hard and not easy to break. The plastic shell and the metal insert are injection molded together, and the two are completely integrated into a whole. No other fasteners are required to lock the insert and the shell together, thereby eliminating the fasteners connecting the insert and the shell together. The insert can be connected to the shell in a shorter case to reduce the installation space of the insert. In addition, there is no gap between the shell and the insert, which avoids the problem of sealing and prevents external dust and water vapor from entering the interior of the battery case. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of a battery pack provided by an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of a battery box provided by an embodiment of the utility model;

[0020] Figure 3 The utility model embodiment provides Figure 2 A partial enlarged schematic diagram of the middle A area;

[0021] Figure 4 It is a structural schematic diagram of an insert provided by an embodiment of the utility model;

[0022] Figure 5 It is a partial enlarged schematic diagram of a battery box provided by another embodiment of the utility model. Explanation of the reference numerals: battery box 100, shell 10, outer standard surface 11, inner standard surface 13, accommodating groove 15, insert 20, first part 21, limiting opening 212, second part 23, installation opening 231, notch 233, handle 30. DETAILED DESCRIPTION

[0023] 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 of 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.

[0024] See also Figures 1 to 4 As shown, Figure 1 is a schematic diagram of the structure of a battery pack provided by an embodiment of the utility model, Figure 2 1 is a schematic diagram of the cross-sectional structure of a battery box 100 provided in an embodiment of the utility model. Figure 3 The utility model embodiment provides Figure 2 A partial enlarged schematic diagram of the A area in the middle. Figure 4 It is a schematic diagram of the structure of the insert 20 provided in the embodiment of the utility model.

[0025] The utility model embodiment provides a battery pack, which includes a plurality of batteries and a battery box 100. The plurality of batteries are assembled in the battery box 100. The plurality of batteries can be electrically connected in series or in parallel or in series and parallel. The batteries can be lithium batteries, sodium batteries, lead-acid batteries, etc. The batteries are used to store and release electricity. The user can carry the battery box 100 to move the battery pack to any location.

[0026] Specifically, the battery case 100 includes a shell 10, an insert 20 and a handle 30. The shell 10 is made of plastic, which may be polycarbonate (PC), polystyrene (PS), etc. The shell 10 made of plastic is easy to be formed into various complex shapes, so that it is more convenient to install various parts of the battery pack; the insert 20 is made of metal, which may be iron, copper, aluminum, etc. The metal insert 20 is hard and not easy to break. Part of the insert 20 is injection-molded and connected to the shell 10, and the other part of the insert 20 is exposed to the shell 10; the handle 30 is connected to the insert 20, and the handle 30 is used for the user to hold and lift the shell 10.

[0027] In this embodiment, the shell 10 is made of plastic material, so it can be molded into various complex shapes, so that it is more convenient to install various parts of the battery pack; the insert 20 is made of metal material, and the metal can be iron, copper, aluminum, etc. The metal insert 20 is hard and not easy to break. The shell 10 made of plastic material and the insert 20 made of metal material are injection molded together, and the two are completely integrated into a whole. No other fasteners are required to lock the insert 20 and the shell 10 together, thereby eliminating the fasteners that connect the insert 20 and the shell 10 together. The insert 20 can be connected to the shell 10 in a shorter case, and no other fasteners are required to lock the insert 20 and the shell 10 together, so the installation space of the insert 20 can be reduced. In addition, there is no gap between the shell 10 and the insert 20, thereby avoiding the problem of sealing and preventing external dust and water vapor from entering the interior of the battery box 100.

[0028] The insert 20 and the housing 10 may be connected by injection molding by a hot embedding method, an ultrasonic embedding method, a cold embedding method, a liquid injection molding method, or the like.

[0029] Specifically, the hot embedding method is a commonly used injection molding method for embedding metal into plastic. First, a position for a metal part is reserved in the plastic mold, and the metal part is preheated. Then, during the injection molding process, the preheated metal part is quickly inserted into the plastic melt to fully combine it with the plastic material. This method is suitable for situations where a certain mechanical strength and sealing are required between the metal part and the plastic.

[0030] Ultrasonic embedding is an injection molding method that uses ultrasonic vibration to combine metal parts with plastic materials. During the injection molding process, the metal parts are quickly inserted into the plastic melt through ultrasonic vibration, so that they form a strong bond with the plastic material. Ultrasonic embedding can achieve a high-strength bond between metal parts and plastics without causing damage to the metal parts. This method is suitable for situations where a close bond between metal parts and plastics is required.

[0031] Cold embedding is an injection molding method that embeds metal into plastic without heating the metal part in advance. During the injection molding process, the metal part is quickly inserted into the plastic melt and then combined with the plastic material by cooling. This method is suitable for situations where a high-strength bond between the metal part and the plastic is not required.

[0032] Liquid injection molding is an injection molding method that injects liquid metal into plastic. During the injection molding process, the liquid metal material and the molten plastic are injected into the mold at the same time, so that the two are mixed and form the desired product. This method is suitable for situations where liquid metal materials need to be mixed with plastic materials.

[0033] The insert 20 includes a first portion 21 and a second portion 23 . The first portion 21 is located in the housing 10 and connected to the housing 10 by injection molding. The second portion 23 is connected to the first portion 21 and exposed to the housing 10 .

[0034] The second part 23 is bent relative to the first part 21. The insert 20 is formed as a whole by bending the first part 21 and the second part 23. Compared with the welding connection method, the manufacturing is simpler, and the connection strength between the first part 21 and the second part 23 is higher and less likely to break.

[0035] An arc transition structure is provided at the connection between the first part 21 and the second part 23. The arc transition structure makes the connection between the first part 21 and the second part 23 smoother, and when the second part 23 is subjected to force, the force can be better transmitted to the first part 21, and the first part 21 further distributes the force on the housing 10, thereby increasing the overall force bearing capacity of the insert 20.

[0036] The outer surface of the housing 10 connected to the first part 21 is the outer standard surface 11. The first part 21 is parallel to the outer standard surface 11, and the parallel here refers to approximately parallel and absolutely parallel. The second part 23 is perpendicular to the outer standard surface 11, and the perpendicular here refers to approximately perpendicular and absolutely perpendicular. The spacing between each position of the first part 21 and the outer standard surface 11 is approximately equal, so that the pressure on the part of the housing 10 located on the outer standard surface 11 is approximately equal, so that the force is balanced and the housing 10 is prevented from deformation.

[0037] The first portion 21 is provided with a limiting opening 212, and a part of the material of the housing 10 is filled in the limiting opening 212. The limiting opening 212 may be in a regular shape such as a square, a rectangle, a triangle, a circle, a dovetail, or an irregular shape. The limiting opening 212 increases the contact area between the housing 10 and the insert 20, thereby increasing the strength of the connection between the two.

[0038] The surface of the first part 21 is provided with a plurality of pits, and / or the surface of the first part 21 is provided with a plurality of protrusions. In one case, the surface of the first part 21 is provided with a plurality of pits, and part of the shell 10 is accommodated in the pits, the pits increase the contact area between the shell 10 and the insert 20, and an undercut structure is formed between the pits and the shell 10, thereby increasing the strength of the connection between the two. In one case, the surface of the first part 21 is provided with a plurality of protrusions, and part of the shell 10 surrounds the protrusions, the protrusions increase the contact area between the shell 10 and the insert 20, and an undercut structure is formed between the protrusions and the shell 10, thereby increasing the strength of the connection between the two. In another case, the surface of the first part 21 has both pits and protrusions, part of the shell 10 surrounds the protrusions and fills in the pits, the pits and protrusions increase the contact area between the shell 10 and the insert 20, and the pits and protrusions form an undercut structure between the insert 20 and the shell 10, thereby increasing the strength of the connection between the two.

[0039] The inner surface of the housing 10 connected to the first part 21 is the inner standard surface 13, the outer surface of the housing 10 connected to the first part 21 is the outer standard surface 11, the first part 21 is parallel to the outer standard surface 11 and the inner standard surface 13, respectively, and the distance between the first part 21 and the outer standard surface 11 is greater than the distance between the first part 21 and the inner standard surface 13. Specifically, the first part 21 has an upper plane and a lower plane, and the distance between the upper plane and the outer standard surface 11 is greater than the distance between the lower plane and the inner standard surface 13, that is, the thickness of the housing 10 above the first part 21 is greater than the thickness of the housing 10 below the first part 21, so that the tensile strength of the housing 10 in the first part 21 area is increased when the thickness of the housing 10 remains unchanged.

[0040] The second portion 23 is provided with an installation opening 231, through which the handle 30 is inserted, and the installation opening 231 can facilitate the insertion of the handle 30 so as to be detachably connected with the insert 20. When the handle 30 is damaged, the handle 30 can be easily replaced, and when the handle 30 is not needed, the handle 30 can also be easily replaced, so as to avoid the handle 30 occupying too much space.

[0041] Furthermore, a notch 233 communicating with the installation opening 231 is provided at one end of the second portion 23 away from the first portion 21. The width of the notch 233 is D1, and the width of the installation opening 231 is D2, 8≤D2 / D1≤20. It can be understood that the installation opening 231 is used to contact the handle 30. Therefore, the wider the width of the installation opening 231, the greater the contact area between the insert 20 and the handle 30, and the force on the insert 20 is more dispersed and balanced. The handle 30 is a flexible belt, the handle 30 is flexible, and the wall thickness of the handle 30 is D3, D3≤D1. The notch 233 is mainly used for the flexible belt to pass through. Without disassembling the flexible belt, the flexible belt can be deformed and taken out through the notch 233.

[0042] Of course, the handle 30 can also be changed from a straight strip to a ring shape through its own Velcro or buttons.

[0043] See also Figure 5 , Figure 5 It is a partially enlarged schematic diagram of a battery box provided in another embodiment of the utility model.

[0044] The housing 10 is provided with a region where the first portion 21 is provided with a receiving groove 15, and part of the second portion 23 is assembled in the receiving groove 15. When the height of the second portion 23 remains unchanged, the more volume of the second portion 23 accommodated in the receiving groove 15, the less volume of the second portion 23 protruding from the outer standard surface 11, thereby reducing the protrusion of the second portion 23 and preventing the insert 20 from scratching other parts or users.

[0045] The number of the inserts 20 can be two, three, or four, etc. The insert 20 connects a plurality of inserts into a whole.

[0046] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0047] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0048] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0049] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A battery box, characterized in that: include: A shell, wherein the shell is made of plastic; An insert, wherein the insert is made of metal, a portion of the insert is connected to the housing by injection molding, and another portion of the insert is exposed outside the housing; as well as A handle is connected to the insert, and the handle is used for a user to hold.

2. The battery box according to claim 1, characterized in that: The insert comprises a first portion and a second portion, wherein the first portion is located in the housing and connected to the housing by injection molding, and the second portion is connected to the first portion and exposed to the housing.

3. The battery box according to claim 2, characterized in that: The second portion is bent relative to the first portion, and a circular arc transition structure is provided at the connection between the first portion and the second portion.

4. The battery box according to claim 2, characterized in that: The outer surface of the housing connected to the first part is an outer standard surface, the first part is parallel to the outer standard surface, and the second part is perpendicular to the outer standard surface.

5. The battery box according to claim 2, characterized in that: The first portion is provided with a limiting opening, and part of the material of the shell is filled in the limiting opening.

6. The battery box according to claim 2, characterized in that: The surface of the first portion is provided with a plurality of pits, and / or the surface of the first portion is provided with a plurality of protrusions.

7. The battery box according to claim 2, characterized in that: The inner surface of the shell connected to the first part is the inner standard surface, the outer surface of the shell connected to the first part is the outer standard surface, the first part is parallel to the outer standard surface and the inner standard surface respectively, and the distance between the first part and the outer standard surface is greater than the distance between the first part and the inner standard surface.

8. The battery box according to claim 2, characterized in that: The second part is provided with a mounting opening, the handle is passed through the mounting opening, and the second part is provided with a notch communicating with the mounting opening at one end away from the first part, the width of the notch is D1, the width of the mounting opening is D2, and 8≤D2 / D1≤20; The handle is a flexible belt, the handle is flexible, the wall thickness of the handle is D3, and D3≤D1.

9. The battery case according to any one of claims 2 to 8, characterized in that: A receiving groove is disposed in the area of ​​the shell connected to the first part, and at least a portion of the second part is sunk into the receiving groove.

10. A battery pack, characterized in that: The battery pack comprises: a plurality of batteries and a battery case as claimed in any one of claims 1 to 9, wherein the plurality of batteries are assembled in the battery case.

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