Cylindrical battery fixing device

Abstract

The utility model relates to a cylindrical battery fixing device which comprises a base used for bearing a vertically arranged cylindrical battery and at least two side supporting pieces connected to the base, the at least two side supporting pieces are circumferentially distributed around the cylindrical battery and abut against the cylindrical battery, and the distance between the side supporting pieces is adjustable. According to the fixing device, the cylindrical battery can be fixed through the base and the at least two side supporting pieces, so that the cylindrical battery is kept in a vertical state during testing, an application scene of a single battery in a Pack is simulated, the cylindrical battery can be prevented from toppling over, measured data conforms to an actual application scene, and data reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery testing, in particular to a cylindrical battery fixing device. Background Art

[0002] With the rapid development of new energy vehicles in my country, the market demand for batteries is increasing. At present, the mainstream batteries on the market are lithium iron phosphate batteries and ternary lithium batteries. However, after the preparation of the above two types of batteries, a part of them needs to be extracted for charge and discharge testing, especially ternary lithium batteries. They can only be sold after confirming that the batch of batteries has no defects in charge and discharge performance, so as to ensure the quality of the finished battery products.

[0003] At present, cylindrical batteries are encapsulated in steel shells and have no external pole ears, so it is necessary to weld connecting plates on the batteries to lead out the positive and negative poles of the batteries for easy connection with the test equipment. Generally, before testing, the cylindrical single battery is placed directly in the test cabinet without using fixed tooling. The battery cell connecting plates are affected by the gravity and traction of the current lines, causing the batteries to be placed horizontally or tilted. On the one hand, the battery product development process usually involves the development of products of different specifications to meet market demand, so the degree of tipping of this battery will also increase with the increase of the battery height. On the other hand, after the pack is grouped, the cells are in a vertical state, and the batteries are in a horizontal or tilted state, which cannot simulate the application scenarios of single cells in the pack. Utility Model Content

[0004] Based on this, it is necessary to address the technical problem that currently cylindrical single cells are directly placed in a test cabinet during testing without using fixed tooling, and the application scenario of the single cell in a pack cannot be simulated. The utility model provides a cylindrical battery fixing device.

[0005] The utility model proposes a cylindrical battery fixing device, comprising a base for supporting a vertically arranged cylindrical battery and at least two side supports connected to the base, wherein the at least two side supports are distributed in a circle around the cylindrical battery and each side support is tightly pressed against the cylindrical battery, and the distance between the side supports is adjustable.

[0006] The fixing device of the utility model can fix the cylindrical battery through the base and at least two side supports, so that the cylindrical battery can remain in a vertical state during testing, simulating the application scenario of the single cell battery in the pack, and can also prevent the cylindrical battery from tipping over, so that the measured data conforms to the actual application scenario, thereby improving data reliability.

[0007] As a further improvement of the above solution of the utility model, a circular groove is provided on the base, a supporting platform coaxial with the circular groove is formed in the circular groove, and the height of the supporting platform is less than the depth of the circular groove.

[0008] As a further improvement of the above scheme of the utility model, the side support member includes a fixed block and a clamping rod, the fixed block has an arc-shaped cross-section and its arc-shaped opening faces the cylindrical battery, and the inner arc surface of the fixed block fits with the cylindrical battery; the clamping rod is arranged at an angle, one end of the clamping rod is connected to the fixed block and the other end thereof is clamped with the base.

[0009] As a further improvement of the above scheme of the utility model, at least two grooves are provided on the base, and the at least two grooves are respectively arranged in one-to-one correspondence with the at least two side support members, and the grooves are arranged radially along the circumference of the at least two side support members. A plurality of buckles are arranged side by side and at intervals in the grooves, and a slot is formed between any two adjacent buckles, and the end of the clamping rod away from the fixed block is clamped in one of the slots.

[0010] As a further improvement of the above solution of the utility model, the fixing block has a heat conduction function.

[0011] As a further improvement of the above solution of the utility model, an infrared radiation heat dissipation coating is provided on the outer arc surface of the fixing block.

[0012] As a further improvement of the above solution of the utility model, a connecting piece is provided on the outer arc surface of the fixing block, a connecting block is connected to the connecting piece and the height of the connecting block is adjustable, and one end of the clamping rod away from the base is connected to the connecting block.

[0013] As a further improvement of the above-mentioned scheme of the utility model, a vertically arranged installation groove is provided on the connecting plate, and two vertically arranged inner walls of the installation groove are provided with vertically arranged slides. The connecting block is arranged in the installation groove and slide grooves are provided on both sides of the connecting block. The two slides are respectively slidably connected with the two slide grooves.

[0014] As a further improvement of the above scheme of the utility model, the side support member also includes a positioning column, and a plurality of screw holes are spaced apart in the vertical direction on the bottom surface of the mounting groove. The positioning column passes through the clamping rod and the connecting block in turn and is connected to one of the screw holes, and the positioning column is threadedly connected to the clamping rod and the connecting block.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The fixing device of the utility model can fix the cylindrical battery through the base and at least two side supports, so that the cylindrical battery remains in a vertical state during testing, simulating the application scenario of the single cell in the Pack, and can also prevent the cylindrical battery from tipping over, so that the measured data conforms to the actual application scenario and improves data reliability.

[0017] 2. The fixing device of the utility model is compatible with cylindrical batteries of different heights. As the height dimensions of large cylindrical batteries are diversified, cylindrical batteries of various heights will also be faced during testing. The fixing device of the utility model can match cylindrical batteries of different heights and has high applicability.

[0018] 3. The fixing block of the fixing device of the utility model has a heat conduction function, and heat dissipation is taken into consideration while fixing, and has both heat dissipation and insulation functions, which is helpful for heat dissipation of the side wall of the cylindrical battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a cylindrical battery fixing device proposed in an embodiment of the utility model;

[0020] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0021] Figure 3 A schematic diagram of the structure of a fixing block in a cylindrical battery fixing device proposed in an embodiment of the utility model;

[0022] Figure 4 A schematic diagram of the connection structure between a clamping rod and a connecting piece of a cylindrical battery fixing device proposed in an embodiment of the utility model;

[0023] Figure 5 A schematic structural diagram of a connecting block in a cylindrical battery fixing device proposed in an embodiment of the utility model.

[0024] Figure numerals: 1. cylindrical battery; 2. base; 3. circular groove; 4. supporting platform; 5. fixing block; 6. clamping rod; 7. buckle; 8. connecting piece; 9. connecting block; 10. mounting groove; 11. slide platform; 12. slide groove; 13. positioning column. DETAILED DESCRIPTION

[0025] 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.

[0026] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0028] In this embodiment, the cylindrical single battery is currently placed directly in the test cabinet during testing, and no fixed tooling is used, which makes it impossible to simulate the technical problem of the application scenario of the single battery in the Pack. A cylindrical battery fixing device is provided, which can fix the cylindrical battery 1 so that the battery remains in a vertical state, so that the cylindrical battery 1 can simulate the application scenario of the single battery in the Pack during testing.

[0029] Reference Figure 1 The cylindrical battery fixing device of this embodiment includes a base 2 and three side supports.

[0030] In this embodiment, the base 2 is in the shape of a disk, a circular groove 3 is coaxially formed in the middle of the base 2, a circular support platform 4 is coaxially formed in the middle of the circular groove 3, and the height of the support platform 4 is less than the depth of the circular groove 3. In this embodiment, three grooves are also formed on the base 2, and the three grooves are distributed circumferentially around the circular groove 3 and the grooves are arranged radially along the base 2, combined with Figure 2 A plurality of buckles 7 are formed in each groove at intervals, and a clamping groove is formed between any two adjacent buckles 7 .

[0031] The three side supports are distributed in a circle around the cylindrical battery 1, and the three side supports are respectively arranged in one-to-one correspondence with the three grooves. In the present embodiment, each side support comprises a fixing block 5, a clamping rod 6 and a positioning column 13. The fixing block 5 of the side support has an arc-shaped cross-section and its arc-shaped opening faces the cylindrical battery 1, and the inner arc surface of the fixing block 5 fits with the cylindrical battery 1. In the present embodiment, surface heat dissipation needs to be considered while fixing. The fixing block 5 has a heat-conducting function. The fixing block 5 is made of a composite material with a heat-conducting function (polymer as a base material, and spherical boron nitride + aluminum nitride as a filling material, which is a heat-conducting material), so that the fixing block 5 has insulation and heat-conducting effects. An infrared radiation heat-dissipating coating (composed of a radiation base material and a filler) is provided on the outer arc surface of the fixing block 5, so that the fixing block 5 plays the role of inner layer fixing, heat conduction and outer layer heat dissipation. In the present embodiment, the width and length of the fixing block 5 are not specifically limited. The width and length of the fixing block 5 can be reasonably designed according to the actual usage. Combined with Figure 3 The outer arc surface of the fixing block 5 is provided with a connecting piece 8, and a vertically arranged mounting groove 10 is provided on the connecting piece 8. A plurality of screw holes are provided at intervals along the vertical direction on the bottom surface of the mounting groove 10. The two vertically arranged inner walls of the mounting groove 10 are provided with vertically arranged slides 11. A connecting block 9 is provided in the mounting groove 10. Figure 4 , both sides of the connecting block 9 are provided with slide grooves 12, and the two slide platforms 11 are respectively connected with the two slide grooves 12 in a sliding manner. The clamping rod 6 is arranged obliquely, and one end of the clamping rod 6 is clamped in one of the clamping grooves. Figure 5 The positioning column 13 passes through the other end of the clamp rod 6 and the connecting block 9 in sequence and then extends into one of the screw holes. The positioning column 13 rotates with the clamp rod 6 and is threadedly connected with the connecting block 9 and the connecting piece 8.

[0032] Through the above structural arrangement, when used to fix the cylindrical battery 1, the cylindrical battery 1 is first placed vertically and the bottom of the cylindrical battery 1 is placed on the supporting platform 4. The area of ​​the supporting platform 4 of this embodiment needs to be smaller than the bottom area of ​​the cylindrical battery 1 and the area of ​​the circular groove 3 needs to be larger than the bottom area of ​​the cylindrical battery 1, so that the bottom of the cylindrical battery 1 can be confined in the circular groove 3; then the fixing blocks 5 of the three side supports are surrounded and fitted on the outer surface of the cylindrical battery 1, and the end of the clamping rod 6 away from the connecting block 9 is clamped in one of the corresponding grooves, thereby fixing the cylindrical battery 1, and then the entire fixing device is placed in the test cabinet, so that the application scenario of the single cell battery being arranged vertically in the Pack can be simulated during detection.

[0033] It should be noted that, in this embodiment, there are three side supports. In other embodiments, as long as the cylindrical battery 1 is fixed, the number of side supports may be other numbers, such as two, four or five.

[0034] It should be noted that, in this embodiment, the cylindrical batteries 1 with different diameters can be fixed by providing the arc-shaped fixing block 5 and the plurality of slots in the groove.

[0035] The cylindrical battery fixing device of this embodiment is compatible with cylindrical batteries of different heights. The specific adjustment method is: first, according to the height of the cylindrical battery 1, push the connecting block 9 to move in the installation groove 10 to adjust the position of the connecting block 9 in the vertical direction; then, according to the height of the connecting block 9, adjust the angle of the clamping rod so that the fixing block 5 fits the battery, and clamp the bottom end of the clamping rod 6 in a suitable clamping groove, and then use the positioning column 13 to pass through the clamping rod 6 and connect it with the connecting block 9 and the connecting piece 8 to complete the fixing of cylindrical batteries of different heights. The position of the connecting block 9 in the installation groove 10 and the clamping position of the bottom of the clamping rod 6 in this embodiment dynamically adapt to batteries of different heights.

[0036] In this embodiment, the height difference between the supporting platform 4 and the depth of the circular groove 3 is maintained within 5 mm. Considering the function of only fixing the bottom of the battery, it is necessary to reduce the area of ​​the base 2 wrapping the cylindrical battery 1 as much as possible to avoid affecting heat dissipation.

[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A cylindrical battery fixing device, characterized in that: The invention comprises a base (2) for supporting a vertically arranged cylindrical battery (1) and at least two side support members connected to the base (2), wherein the at least two side support members are distributed in a circumference around the cylindrical battery (1) and each side support member is tightly pressed against the cylindrical battery (1), and the distance between the side support members is adjustable.

2. The cylindrical battery fixing device according to claim 1, characterized in that: A circular groove (3) is provided on the base (2), a supporting platform (4) coaxial with the circular groove (3) is formed in the circular groove (3), and the height of the supporting platform (4) is less than the depth of the circular groove (3).

3. The cylindrical battery fixing device according to claim 1, characterized in that: The side support member comprises a fixing block (5) and a clamping rod (6); the fixing block (5) has an arc-shaped cross-section and its arc-shaped opening faces the cylindrical battery (1); the inner arc surface of the fixing block (5) fits the cylindrical battery (1); the clamping rod (6) is arranged obliquely, one end of the clamping rod (6) is connected to the fixing block (5) and the other end thereof is clamped to the base (2).

4. The cylindrical battery fixing device according to claim 3, characterized in that: At least two grooves are provided on the base (2), and the at least two grooves are respectively arranged in one-to-one correspondence with the at least two side support members. The grooves are arranged radially along the circumference of the at least two side support members. A plurality of buckles (7) are arranged side by side at intervals in the grooves, and a clamping groove is formed between any two adjacent buckles (7). One end of the clamping rod (6) away from the fixing block (5) is clamped in one of the clamping grooves.

5. The cylindrical battery fixing device according to claim 3, characterized in that: The fixing block (5) has a heat conduction function.

6. The cylindrical battery fixing device according to claim 5, characterized in that: An infrared radiation heat dissipation coating is provided on the outer arc surface of the fixing block (5).

7. The cylindrical battery fixing device according to claim 3, characterized in that: The outer arc surface of the fixing block (5) is provided with a connecting piece (8), the connecting piece (8) is connected to a connecting block (9), and the height of the connecting block (9) is adjustable; the end of the clamping rod (6) away from the base (2) is connected to the connecting block (9).

8. The cylindrical battery fixing device according to claim 7, characterized in that: A vertically arranged mounting groove (10) is provided on the connecting piece (8), two vertically arranged inner walls of the mounting groove (10) are provided with vertically arranged slides (11), a connecting block (9) is arranged in the mounting groove (10) and slides (12) are provided on both sides of the connecting block (9), and the two slides (11) are respectively connected to the two slides (12) in a sliding manner.

9. The cylindrical battery fixing device according to claim 7, characterized in that: The side support member also includes a positioning column (13). The bottom surface of the mounting groove (10) is provided with a plurality of screw holes spaced apart in the vertical direction. The positioning column (13) passes through the clamping rod (6) and the connecting block (9) in sequence and is connected to one of the screw holes. The positioning column (13) is threadedly connected to the clamping rod (6) and the connecting block (9).

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