Packaging structure for battery pack and battery pack thereof

Abstract

In order to solve the problems that according to an existing packaging structure without a single battery buffering part, a battery collides with a blister material partition plate, the blister material is broken and the passing rate of a drop test is reduced in a battery pack drop test, the utility model provides a packaging structure for a battery pack and the battery pack thereof. A plurality of positioning grooves and a plurality of buffer grooves are formed in the limiting piece, the positioning grooves are formed at intervals in the first direction, and one buffer groove is formed between every two adjacent positioning grooves; the battery is arranged in the positioning groove, and the groove wall of the positioning groove and the groove wall of the buffering groove are both made of elastic materials. According to the packaging structure, the positioning grooves and the buffering grooves are arranged at intervals, the buffering grooves play a buffering role, battery short circuit caused by mutual contact of soldering lugs at battery tab ends due to battery collision is prevented, and the battery falling test passing rate is increased; and the buffer groove can also prevent the soldering lug on the battery from deformation caused by collision, so that the battery assembly efficiency is improved.

Description

Technical Field

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

[0002] Existing batteries, such as cylindrical batteries, include positive terminals and negative terminals, wherein the positive terminals and negative terminals have structures located at both ends of the shell, and there are also structures in which the positive terminals and negative terminals are located at one end of the shell. For batteries in which both the positive terminals and negative terminals are located at one end, the existing packaging structure is as follows: a plurality of outer baffles, partitions and side baffles are arranged in the packaging box, two outer baffles and two side baffles form a rectangular frame, and partitions are arranged in the rectangular frame to divide into a plurality of equidistant grid-shaped battery positioning grooves, and the battery is placed flat in the battery positioning groove; the material of the outer baffles, partitions and side baffles is blister material. The above packaging structure has the following problems: 1) After the packaged battery pack is subjected to a drop test, the battery pack is easily scattered because it is placed flat in the positioning groove. There is no buffer part for a single battery in the packaging box. During the drop test, the battery will hit the partition of the blister material, and the blister material will break, resulting in the risk of battery contact leading to short circuit, which directly leads to a decrease in the pass rate of the drop test; at the same time, the battery is placed flat in the positioning groove, and the welding piece set on the battery is also easy to hit and deform. Utility Model Content

[0003] The utility model aims at the existing packaging structure without a single battery buffer part. In the battery pack drop test, the battery hits the blister material partition, the blister material breaks, and the drop test pass rate is reduced. The present application provides a packaging structure for a battery pack and a battery pack thereof.

[0004] The utility model provides a packaging structure for a battery pack, including a limiting member, on which a plurality of positioning grooves and a plurality of buffer grooves are arranged, the plurality of positioning grooves are arranged at intervals in a first direction, and a buffer groove is arranged between two adjacent positioning grooves; a battery is arranged in the positioning groove, and the groove walls of the positioning groove and the buffer groove are both made of elastic material.

[0005] Preferably, the limiting member includes a plurality of first partitions and a plurality of second partitions, the plurality of first partitions are arranged at intervals along the first direction, the plurality of second partitions are arranged at intervals along the second direction, the first direction is perpendicular to the second direction, and the plurality of first partitions and the plurality of second partitions are snapped together to form the positioning groove and the buffer groove.

[0006] Preferably, the first partition plate and the second partition plate are both made of elastic material.

[0007] Preferably, the first partition and the second partition are made of paper.

[0008] Preferably, the packaging structure further includes a box body and a plurality of buffer members, the plurality of buffer members are arranged in the box body, the limiting member is located between two of the buffer members, the buffer member covers the positioning groove and the buffer groove, and both ends of the battery abut against the buffer member.

[0009] Preferably, the buffer is made of pearl cotton.

[0010] Preferably, in the second direction, the positioning groove and the buffer groove are continuously arranged;

[0011] The second direction is perpendicular to the first direction.

[0012] Preferably, the volume of the positioning groove is larger than the volume of the buffer groove.

[0013] In a second aspect, the present application provides a battery pack, comprising a single cell and the above-mentioned packaging structure for a battery pack, wherein at least one single cell is arranged in each of the positioning grooves, each of the single cell comprises a pole lug end, and an extension direction of the battery toward the pole lug end intersects with a plane where the first direction is located, and an angle of intersection is greater than 0.

[0014] Preferably, the extension direction of each single cell toward the pole ear end is perpendicular to the plane where the first direction is located; the pole ear end is provided with a welding piece, the welding piece extends away from one end of the battery toward the buffer groove, and the welding piece of each single cell does not contact the adjacent single cell.

[0015] The packaging structure for a battery pack provided by the present application has a battery arranged in a positioning groove, and the groove wall of the positioning groove is made of an elastic material. When the battery pack is subjected to a drop test, the groove wall of the elastic material plays a buffering role, and also prevents the groove wall of the positioning groove from breaking; a buffer groove is arranged between two adjacent positioning grooves, and the buffer groove plays a buffering role, preventing the battery from colliding with the welding pieces at the battery ear end and contacting with each other to cause a battery short circuit, thereby improving the pass rate of the battery pack drop test; the buffer groove can also prevent the welding pieces on the battery from being deformed due to impact, thereby improving the battery assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a packaging structure for a battery pack provided by an embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of a battery pack structure provided by an embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of a packaging structure for a battery pack - a first partition structure provided by an embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of a packaging structure for a battery pack - a second partition structure provided by one embodiment of the utility model.

[0020] 1. Positioning groove; 101. First partition; 102. Second partition; 103. Card slot; 2. Buffer slot; 3. Battery; 301. Welding piece; 4. Box body; 5. Buffer. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] In order to illustrate the technical solution of the present utility model, specific embodiments are provided below for illustration.

[0023] like Figure 1-Figure 4 As shown, an embodiment of the utility model provides a packaging structure for a battery pack, including a limiting member, on which a plurality of positioning grooves 1 and a plurality of buffer grooves 2 are arranged, the plurality of positioning grooves 1 are arranged at intervals in a first direction, and a buffer groove 2 is arranged between two adjacent positioning grooves 1; a battery 3 is arranged in the positioning groove 1, and the groove walls of the positioning groove 1 and the buffer groove 2 are both made of elastic material.

[0024] The packaging structure for a battery pack provided in the present application has a battery 3 arranged in a positioning groove 1, and the groove wall of the positioning groove 1 is made of an elastic material. When the battery pack is subjected to a drop test, the groove wall of the elastic material plays a buffering role, and also prevents the groove wall of the positioning groove 1 from breaking; a buffer groove 2 is arranged between two adjacent positioning grooves 1, and the buffer groove 2 plays a buffering role, preventing the battery 3 from colliding with the welding piece 301 at the ear end of the battery 3 from contacting each other and causing the battery 3 to short-circuit, thereby improving the pass rate of the battery pack drop test; the buffer groove 2 can also prevent the welding piece 301 set on the battery 3 from deformation due to impact, thereby improving the battery assembly efficiency.

[0025] In this embodiment, the limiting member includes a plurality of first partitions 101 and a plurality of second partitions 102, the plurality of first partitions 101 are arranged at intervals along a first direction, the plurality of second partitions 102 are arranged at intervals along a second direction, the first direction is perpendicular to the second direction, and the plurality of first partitions 101 and the plurality of second partitions 102 are snapped together to form the positioning groove 1 and the buffer groove 2.

[0026] Specifically, Figure 1As shown, the first direction is the x-axis direction, and the second direction is the y-axis direction. In the x-axis direction, multiple first partitions 101 are arranged at intervals, and in the y-axis direction, multiple second partitions 102 are arranged at intervals. The first partitions 101 and the second partitions 102 are arranged alternately, and are snap-fitted to form multiple spaced positioning grooves 1, and also snap-fitted to form multiple spaced buffer grooves 2. In the x-axis direction, a buffer groove 2 is arranged between two adjacent positioning grooves 1.

[0027] The present application does not limit the width, length and height of the first partition 101 and the second partition 102. The height of the first partition 101 and the second partition 102 can be adjusted accordingly according to the height of the battery 3 so that the formed positioning groove 1 can place the battery 3 therein; the length of the first partition 101 and the second partition 102 is determined according to the number of single cells required.

[0028] Specifically, Figure 3-4 As shown, the first partition plate 101 and the second partition plate 102 are provided with a plurality of slots 103 along their length direction, and the slots 103 of the first partition plate 101 and the slots 103 of the second partition plate 102 are engaged with each other to form positioning slots 1 and buffer slots 2.

[0029] In this embodiment, the first partition plate 101 and the second partition plate 102 are both made of elastic material.

[0030] Specifically, the materials of the first partition 101 and the second partition 102 are both elastic materials, and the groove wall of the positioning groove 1 formed by the first partition 101 and the second partition 102 is also elastic. When the battery 3 is subjected to a drop test, the groove wall acts as a buffer to prevent the battery 3 from colliding and causing the groove wall of the positioning groove 1 to break, thereby preventing the battery 3 from contacting and short-circuiting.

[0031] Similarly, the buffer groove 2 formed by the first partition 101 and the second partition 102 is also made of elastic material. The buffer groove 2 made of elastic material can also play a buffering role to prevent the welding piece 301 set on the battery 3 from being deformed due to impact. At the same time, it prevents the battery 3 from being impacted and causing the welding pieces 301 at the ear ends of the battery 3 to contact each other, causing the battery 3 to short-circuit, thereby improving the pass rate of the battery 3 drop test.

[0032] In this embodiment, the first separator 101 and the second separator 102 are made of paper.

[0033] Paper material is cheaper than blister material, which reduces the cost of packaging structure.

[0034] In this embodiment, if Figure 2As shown, the packaging structure also includes a box body 4 and a plurality of buffer members 5, wherein the plurality of buffer members 5 are arranged in the box body 4, the limiting member is located between two of the buffer members 5, the buffer member 5 covers the positioning groove 1 and the buffer groove 2, and both ends of the battery 3 are in contact with the buffer member 5.

[0035] Specifically, the buffer member 5 covers the positioning groove 1 and the buffer groove 2, and the upper and lower ends of the battery 3 are in contact with the buffer member 5. The upper and lower ends of the battery 3 and the surroundings of the battery 3 can be buffered, thereby improving the pass rate of the drop test of the battery 3.

[0036] The upper and lower ends of the battery 3 are in contact with the buffer 5, and the buffer 5 is in close contact with the exposed metal of the positive and negative ends of the battery 3, isolating the moisture in the air, thereby blocking the formation of electrolyte and preventing rust caused by electrochemical corrosion.

[0037] In this embodiment, the buffer member 5 is made of pearl cotton.

[0038] Specifically, the pearl cotton has good elasticity and plays a good buffering role. At the same time, it can also better isolate the moisture in the air, and effectively prevent the rust caused by the electrochemical corrosion of the battery 3.

[0039] In this embodiment, the positioning groove 1 and the buffer groove 2 are continuously arranged in the second direction;

[0040] The second direction is perpendicular to the first direction.

[0041] Specifically, Figure 1 As shown, in the second direction, that is, in the y-axis direction, the positioning groove 1 is continuously arranged, and the buffer groove 2 is also continuously arranged; because of the packaging structure of the present application, the welding piece 301 at the pole ear end of the battery 3 is facing the buffer groove 2, when the battery 3 is dropped, the welding piece 301 of the battery 3 will not contact in the y-axis direction, so in the y-axis direction, the positioning groove 1 and the buffer groove 2 are continuously arranged, which can improve the space utilization rate of the packaging structure and carry more single cells.

[0042] In this embodiment, the volume of the positioning groove 1 is greater than the volume of the buffer groove 2 .

[0043] Specifically, a single battery is placed in the positioning groove 1, and the battery 3 is not placed in the buffer groove 2. The volume of the positioning groove 1 is larger than that of the buffer groove 2, which is convenient for placing more single batteries in the positioning groove 1, while improving the space utilization of the packaging structure and reducing transportation costs.

[0044] In the second aspect, the present application provides a battery pack, including a single cell and the above-mentioned packaging structure for the battery pack, each of the positioning grooves 1 is provided with at least one single cell, each of the single cell includes a pole ear end, and the extension direction of the battery 3 toward the pole ear end intersects with the plane described in the first direction, and the intersection angle is greater than 0.

[0045] Specifically, one single battery, two single batteries, three single batteries or more than three single batteries can be arranged in the positioning groove 1. The extension direction of the battery 3 toward the pole ear end intersects with the plane where the first direction is located, and the intersection angle is greater than 0, that is, the battery 3 is not placed flat in the positioning groove 1, but the battery 3 is placed upright in the positioning groove 1; such a positioning groove 1 can be placed in a plurality of single batteries, thereby improving space utilization and reducing transportation costs.

[0046] The battery pack provided by the present application uses the above packaging structure, at least one single battery is arranged in a single positioning groove 1, the extension direction of the battery 3 toward the pole ear end intersects with the plane where the first direction is located, and the intersection angle is greater than 0, and the single battery is placed standing in the positioning groove 1. Multiple single batteries can be placed in one positioning groove 1, thereby improving space utilization and reducing transportation costs. At the same time, the battery pack formed by the above packaging structure can improve the drop test pass rate of the battery pack.

[0047] In this embodiment, the extension direction of each single cell toward the pole lug end is perpendicular to the plane where the first direction is located; the battery 3 includes a pole lug end, and the pole lug end is provided with a welding piece 301, and the welding piece 301 extends away from one end of the battery 3 toward the buffer slot 2, and the welding piece 301 of each single cell does not contact the adjacent single cell.

[0048] Specifically, the extension direction of each single battery toward the tab end is perpendicular to the plane where the first direction is located, that is, the single battery is vertically placed in the positioning groove 1, which helps to place multiple single batteries in the positioning groove 1 and improve the space utilization of the packaging structure.

[0049] The welding piece 301 extends away from one end of the battery 3 toward the buffer slot 2 to prevent the battery 3 from short-circuiting due to the collision of two adjacent single batteries, and also to prevent the battery 3 from deforming due to the collision of the welding piece 301. The welding piece 301 of each single battery is limited to not contact the adjacent single battery, to prevent the welding piece 301 from contacting the housing or welding piece 301 of the adjacent battery 3, which may cause the battery 3 to short-circuit.

[0050] In a preferred embodiment, two single batteries are placed in each positioning groove 1 .

[0051] In a more preferred embodiment, four single cells are placed in each positioning groove 1 , and the four single cells can be arranged in two rows, with two cells 3 in each row.

[0052] It is understandable that the number of single cells in the positioning groove 1 is greater than or equal to 1, and the number of single cells can be set according to actual needs; the welding piece 301 of each single cell in the positioning groove 1 does not contact with the adjacent battery 3.

[0053] like Figure 2 As shown, multiple first partitions in the box body 4 are arranged along a direction parallel to the x-axis, and multiple second partitions 102 are arranged along a direction parallel to the y-axis. The arrangement of the first partitions and the second partitions 102 forms multiple positioning grooves 1 and buffer grooves 2. In the area formed by the first partitions 101, the second partitions 102 and the side walls of the box body 4, no battery 3 is placed, and the welding piece 301 of the single battery close to the side wall is facing the direction of the side wall.

[0054] The battery pack provided in the present application comprises the following steps when being assembled: firstly pad two cushioning members 5 made of pearl cotton at the bottom of the box body 4, place a plurality of first partitions 101 in the x-axis direction above the cushioning members 5, and place a plurality of second partitions 102 in the y-axis direction, the first partitions 101 and the second partitions 102 are arranged to form a plurality of positioning grooves 1 and buffer grooves 2, two single cells are placed in each positioning groove 1, and the welding piece 301 of the single cell faces the buffer groove 2, the single cells are to be placed in the same direction, and the empty area next to the side wall of the box body 4 is not allowed to place single cells, and then place two cushioning members 5 made of pearl cotton above the first partition 101 and the second partition 102; and finally, the box body 4 is packaged.

[0055] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the utility model, and should be included in the protection scope of the utility model.

Claims

1. A packaging structure for a battery pack, characterized in that: The invention comprises a limiting member, wherein the limiting member is provided with a plurality of positioning grooves (1) and a plurality of buffer grooves (2); the plurality of positioning grooves (1) are arranged at intervals in a first direction, and a buffer groove (2) is arranged between two adjacent positioning grooves (1); a battery (3) is arranged in the positioning groove (1), and the groove walls of the positioning groove and the buffer groove (2) are both made of elastic material.

2. The packaging structure for a battery pack according to claim 1, characterized in that: The limiting member comprises a plurality of first partitions (101) and a plurality of second partitions (102); the plurality of first partitions (101) are arranged at intervals along a first direction; the plurality of second partitions (102) are arranged at intervals along a second direction; the first direction is perpendicular to the second direction; the plurality of first partitions (101) and the plurality of second partitions (102) are engaged to form the positioning groove (1) and the buffer groove (2).

3. The packaging structure for a battery pack according to claim 2, characterized in that: The first partition plate (101) and the second partition plate (102) are both made of elastic material.

4. The packaging structure for a battery pack according to claim 3, characterized in that: The first partition (101) and the second partition (102) are made of paper.

5. The packaging structure for a battery pack according to claim 1, characterized in that: The packaging structure further comprises a box body (4) and a plurality of buffer members (5), wherein the plurality of buffer members (5) are arranged in the box body (4), the limiting member is located between two of the buffer members (5), the buffer member (5) covers the positioning groove (1) and the buffer groove (2), and both ends of the battery (3) are in contact with the buffer member (5).

6. The packaging structure for a battery pack according to claim 5, characterized in that: The material of the buffer component (5) is pearl cotton.

7. The packaging structure for a battery pack according to claim 1, characterized in that: In the second direction, the positioning groove (1) and the buffer groove (2) are both arranged continuously; The second direction is perpendicular to the first direction.

8. The packaging structure for a battery pack according to claim 1, characterized in that: The volume of the positioning groove (1) is greater than the volume of the buffer groove (2).

9. A battery pack, characterized in that: A packaging structure for a battery pack comprising a single cell and any one of claims 1 to 8, wherein at least one single cell is arranged in each positioning groove (1), each single cell comprises a tab end, and an extension direction of the battery towards the tab end intersects with a plane where the first direction is located, and an angle of intersection is greater than 0.

10. The battery pack according to claim 9, characterized in that: The extension direction of each single cell toward the pole lug end is perpendicular to the plane where the first direction is located; the pole lug end is provided with a welding piece (301), the welding piece (301) extends in a direction away from one end of the battery (3) toward the buffer slot (2), and the welding piece (301) of each single cell does not contact the adjacent single cell.

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