A cylindrical battery test connection device

Abstract

The utility model discloses a cylindrical battery test connection device, which relates to the technical field of battery test devices. Aiming at the problem that the existing ejector connection method has a small contact area, is not firm enough, and is easy to loosen, and generates heat and causes safety accidents when performing high-rate performance and safety tests on 46 series cylinders, the following scheme is proposed, which includes a battery, a positive electrode connecting piece and a negative electrode connecting piece. The positive electrode connecting piece is connected to the top of the battery, one end of the positive electrode connecting piece is connected to the middle of the upper end of the battery, and the upper end of the battery away from the positive electrode connecting piece is connected to the negative electrode connecting piece, and the negative electrode connecting piece is connected to the outer side of the upper end of the battery. The utility model has a novel structure, is connected to the positive electrode of the battery through one end of the positive electrode connecting piece without a hole, and is designed with a groove on one side of the negative electrode connecting piece, thereby increasing the contact area with the battery, thereby reducing the heat generation during the test.

Description

Technical Field

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

[0002] Sodium-ion and lithium-ion batteries are both energy storage devices that convert electrical energy into chemical energy. Among them, cylindrical batteries have the longest development time, the highest degree of standardization of production process equipment, the most mature process, the highest production yield rate, and the lowest production cost. At present, the performance and safety of cylindrical batteries need to be tested, and as the capacity of batteries increases, the requirements for testing are also getting higher and higher, especially the requirements for rate performance. As an important direction of cylindrical batteries, the 46 series cylindrical battery has higher requirements for its process technology and performance evaluation;

[0003] At present, the conventional testing method for cylindrical batteries is to use a pin connection. As the capacity of the battery increases, the testing requirements are also getting higher and higher, especially the requirements for rate performance. The pin connection method has a small contact area and is not reliable enough and is easy to loosen. When conducting high-rate performance and safety tests on the 46 series cylindrical batteries, heat is generated and safety accidents occur. Utility Model Content

[0004] The utility model provides a cylindrical battery test connection device, which solves the existing problems.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a cylindrical battery test connection device, comprising a battery, a positive electrode connecting plate and a negative electrode connecting plate, wherein a positive electrode connecting plate is connected to the top of the battery, one end of the positive electrode connecting plate is connected to the middle of the upper end of the battery, and the positive electrode connecting plate is used to stably fix and conduct the positive electrode of the battery, a negative electrode connecting plate is connected to the top of the battery away from the positive electrode connecting plate, and the negative electrode connecting plate is connected to the outer side of the upper end of the battery, and the negative electrode connecting plate is used to stably fix and conduct the negative electrode.

[0006] Preferably, the device is made of metal material, and part of the device is covered with Teflon material to improve the supporting strength and conductivity of the device. The middle part of the side of the battery is the positive electrode, and the outer side of the battery is the negative electrode.

[0007] Preferably, the positive electrode connecting piece is in the shape of a long strip, and arc-shaped protrusions are provided at both ends of the positive electrode connecting piece, and the arc radius is 90 mm.

[0008] Preferably, the arc-shaped portion at one end of the positive electrode connecting piece is connected to the middle of one end of the battery, and the middle of the arc-shaped portion at the other end of the positive electrode connecting piece is connected to a first screw for fixing the test power line.

[0009] Preferably, the width of the negative electrode connecting plate is greater than that of the positive electrode connecting plate, and a groove is provided at one end of the negative electrode connecting plate, and the radius of the groove is 110 mm. A semicircular arc plate is provided at the other end of the negative electrode connecting plate, and the radius of the arc plate is 230 mm. A second screw is connected inside the arc plate, and the second screw is used to fix the test power line.

[0010] Preferably, the negative electrode connecting sheet and the positive electrode connecting sheet are connected to the same side, and one end of the groove in the negative electrode connecting sheet is connected to the outer side of one end of the positive electrode connecting sheet.

[0011] Preferably, the positive electrode connecting piece is connected to one side of the battery, the negative electrode connecting piece is connected to the side away from the positive electrode connecting piece, and the grooves in the negative electrode connecting piece and the positive electrode connecting piece are connected facing each other with the first screw end.

[0012] The beneficial effects of the utility model are as follows: the device uses metal copper coated with Teflon material, which not only ensures the supporting strength and good conductivity of the device but also prevents short circuits, thereby improving the safety of the test; the end of the positive electrode connecting piece without a hole is connected to the positive electrode of the battery, and a groove is designed on one side of the negative electrode connecting piece to increase the contact area with the battery, thereby reducing heat generation during the test; the device has a simple structure, is easy to manufacture, reduces production costs, and is conducive to large-scale production and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 For the utility model Figure 1 Top view of the .

[0015] Figure 3 It is a structural schematic diagram of the utility model.

[0016] Figure 4 For the utility model Figure 3 Top view of the .

[0017] Figure 5 This is a dimension diagram of the positive electrode connecting piece of the present utility model.

[0018] Figure 6 This is the dimension diagram of the negative electrode connecting piece of the utility model

[0019] Numbers in the figure: 1, battery; 2, positive electrode connecting plate; 201, first screw; 3, negative electrode connecting plate; 301, groove; 302, second screw. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-Figure 6 A cylindrical battery test connection device comprises a battery 1, a positive electrode connecting piece 2 and a negative electrode connecting piece 3. The positive electrode connecting piece 2 is connected to the top of the battery 1, one end of the positive electrode connecting piece 2 is connected to the middle of the upper end of the battery 1, and the positive electrode connecting piece 2 is used to stably fix and conduct the positive electrode of the battery 1. The negative electrode connecting piece 3 is connected to the end of the battery 1 away from the positive electrode connecting piece 2, and the negative electrode connecting piece 3 is connected to the outer side of the upper end of the battery 1, and the negative electrode connecting piece 3 is used to stably fix and conduct the negative electrode.

[0022] Embodiment 1

[0023] refer to Figure 1 , Figure 2 The device is made of metal copper, and part of the device is covered with Teflon material to improve the supporting strength and conductivity of the device to prevent it from short circuiting. The middle part of the side of the battery 1 is the positive electrode, and the outer side of the battery 1 is the negative electrode. The positive electrode connecting piece 2 is a long strip plate structure, and both ends of the positive electrode connecting piece 2 are provided with arc-shaped protrusions with an arc radius of 90mm. The arc at one end of the positive electrode connecting piece 2 is connected to the middle of one end of the battery 1, and the middle of the arc at the other end of the positive electrode connecting piece 2 is connected with a first screw 201 for fixing the test power line. The width of the negative electrode connecting piece 3 is greater than that of the positive electrode connecting piece 2, and a groove 301 is opened at one end of the negative electrode connecting piece 3, and the radius of the groove 301 is 110mm. A semicircular arc plate is provided at the other end of the negative electrode connecting piece 3, and the arc plate radius is 230mm, and a second screw 302 is connected inside the arc plate, and the second screw 302 is used to fix the test power line.

[0024] Working principle: The positive connecting piece 2 and the negative connecting piece 3 are on the same side. First, the arc end without a hole of the positive connecting piece 2 is connected to the positive electrode of the battery 1 by welding, and the end with a hole is fixed to the test power line by the first screw 201 connected internally. Then, the end without a hole of the negative connecting piece 3 is connected to the negative electrode of the battery 1 by welding, and the end with a hole is fixed to the test power line by the second screw 302.

[0025] Embodiment 2

[0026] refer to Figure 3 , Figure 4The negative electrode connecting piece 3 and the positive electrode connecting piece 2 are connected to the same side, and one end of the groove 301 in the negative electrode connecting piece 3 is connected to the outside of one end of the positive electrode connecting piece 2, the positive electrode connecting piece 2 is connected to one side of the battery 1, and the negative electrode connecting piece 3 is connected to the side away from the positive electrode connecting piece 2, and the grooves 301 in the negative electrode connecting piece 3 and the positive electrode connecting piece 2 are connected to the ends of the first screw 201 facing each other.

[0027] The positive electrode connecting piece 2 and the negative electrode connecting piece 3 are on different sides. First, the battery 1 is consistent with Example 1, and then the negative electrode connecting piece 3, the end without a hole, is connected to the negative electrode of the battery 1 away from the positive electrode connecting piece 2 by welding, and the end with a hole is fixed to the test power line by the second screw 302;

[0028] The dimensions of both instances are identical (ref. Figure 5 , Figure 6 ).

[0029] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A cylindrical battery test connection device, comprising a battery (1), a positive electrode connection sheet (2) and a negative electrode connection sheet (3), characterized in that: A positive electrode connecting piece (2) is connected to the top of the battery (1), one end of the positive electrode connecting piece (2) is connected to the middle of the top of the battery (1), and the positive electrode connecting piece (2) is used to stably fix and conduct the positive electrode of the battery (1); a negative electrode connecting piece (3) is connected to the top of the battery (1) away from the positive electrode connecting piece (2), and the negative electrode connecting piece (3) is connected around the outer side of the top of the battery (1), and the negative electrode connecting piece (3) is used to stably fix and conduct the negative electrode.

2. A cylindrical battery test connection device according to claim 1, characterized in that: The device is made of metal and is partially covered with Teflon material. The middle of the side of the battery (1) is the positive electrode, and the outer side of the battery (1) is the negative electrode.

3. A cylindrical battery test connection device according to claim 1, characterized in that: The positive electrode connecting piece (2) is in the form of a long strip plate, and arc-shaped protrusions are provided at both ends of the positive electrode connecting piece (2), and the arc radius is 90 mm.

4. A cylindrical battery test connection device according to claim 2, characterized in that: The arcuate portion at one end of the positive electrode connecting piece (2) is connected to the middle of one end of the battery (1), and the middle of the arcuate portion at the other end of the positive electrode connecting piece (2) is connected to a first screw (201) for fixing the test power line.

5. A cylindrical battery test connection device according to claim 1, characterized in that: The width of the negative electrode connecting piece (3) is greater than that of the positive electrode connecting piece (2), and a groove (301) is provided at one end of the negative electrode connecting piece (3), and the radius of the groove (301) is 110 mm. A semicircular arc plate is provided at the other end of the negative electrode connecting piece (3), and the radius of the arc plate is 230 mm. A second screw (302) is connected inside the arc plate, and the second screw (302) is used to fix the test power line.

6. A cylindrical battery test connection device according to claim 1, characterized in that: The negative electrode connecting piece (3) and the positive electrode connecting piece (2) are connected to the same side, and one end of the groove (301) in the negative electrode connecting piece (3) is connected to the outside of one end of the positive electrode connecting piece (2).

7. A cylindrical battery test connection device according to claim 1, characterized in that The positive electrode connecting piece (2) is connected to one side of the battery (1), the negative electrode connecting piece (3) is connected to the side away from the positive electrode connecting piece (2), and the grooves (301) in the negative electrode connecting piece (3) and the positive electrode connecting piece (2) are connected to the ends of the first screw (201) facing each other.

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