Current collector assembly, single battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and discloses a current collector assembly, a single battery and electric equipment. The current collector assembly comprises an insulating spacer, a first current collector and a second current collector, wherein the insulating spacer is provided with a first mounting groove and a second mounting groove which are opposite to each other; the first current collector is mounted in the first mounting groove in a matched manner, any one of the insulating spacer and the first current collector is provided with a first connecting column, the other one is provided with a first connecting hole, and the first connecting column is inserted into the first connecting hole in a matched manner; the second current collector is installed in the second installation groove in a matched mode, any one of the insulation spacer and the second current collector is provided with a second connecting column, the other one is provided with a second connecting hole, and the second connecting column is connected with the second connecting hole in a matched and inserted mode. According to the current collector assembly, the assembly efficiency of the current collector assembly can be improved, the welding quality between the current collector assembly and the cover plate and between the current collector assembly and the battery cell is improved, and the use reliability of the finally formed single battery is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a current collector assembly, single battery and electric equipment. BACKGROUND

[0002] Lithium battery has small volume, large capacity, long service life, low self-discharge rate, no memory effect, green environmental protection and the like advantages, is currently widely used in commercial vehicle, special vehicle, electric bicycle, energy storage system, medical instrument etc., the current high energy density battery becomes the development trend, and cylindrical battery group efficiency is high, consistency is good, has extensive application prospect.

[0003] The welding mode of the tab and the top cover of the traditional cylindrical battery is that the tab is led out and the tab and the top cover connecting piece are welded through spot welding, this mode has the problems of small current-carrying area, leading to poor overcurrent capacity, is not suitable for the high rate charge-discharge process of large capacity cylindrical battery, and when the cover plate and the current collector convex are welded, the phenomena of poor welding, welding off and virtual welding often appear, causing the battery to break down, affecting the production yield, and there is a great risk hidden danger.

[0004] Therefore, it is urgent to provide a new current collector assembly, single battery and electric equipment, so as to solve the above technical problems in the prior art. UTILITY MODEL CONTENTS

[0005] One purpose of the utility model is to provide a current collector assembly, which can improve the assembly efficiency of the current collector assembly, and improve the welding quality between the current collector assembly, the cover plate and the battery cell, and improve the use reliability of the finally formed single battery.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] The current collector assembly comprises an insulating gasket, a first current collector and a second current collector, the insulating gasket is provided with opposite first and second installation grooves, the first current collector is installed in the first installation groove, either the insulating gasket or the first current collector is provided with a first connecting column, and the other is provided with a first connecting hole, the first connecting column and the first connecting hole are matched and inserted, the second current collector is installed in the second installation groove, either the insulating gasket or the second current collector is provided with a second connecting column, and the other is provided with a second connecting hole, the second connecting column and the second connecting hole are matched and inserted, the first current collector, the second current collector and the insulating gasket are located on the same horizontal plane, and the insulating gasket is clamped between the first current collector and the second current collector.

[0008] Optionally, the second mounting groove comprises a main body portion and a center portion in communication with each other, and the center portion is coaxially arranged with the insulating pad; the second current collector comprises a protruding portion and a fitting portion connected with each other, the protruding portion is fitted and connected to the center portion, the fitting portion is fitted and connected to the main body portion, and the fitting portion is used for welding with the tab of the battery cell.

[0009] Optionally, a connecting portion is connected between the protruding portion and the fitting portion, and the connecting portion has elasticity.

[0010] Optionally, the connecting portion is formed by bending a plate material, and a longitudinal section of the connecting portion is in a wave shape.

[0011] Optionally, the insulating pad is provided with a surrounding edge, the fitting portion is clamped between the surrounding edge and the second mounting groove, and a top wall of the surrounding edge is higher than the fitting portion.

[0012] Optionally, the first current collector is provided with a turned-up edge portion, the turned-up edge portion surrounds an end of the first current collector away from the insulating pad, and a top wall of the turned-up edge portion has a same height as a top wall of the surrounding edge.

[0013] Optionally, a plurality of first connecting columns and a plurality of second connecting columns are arranged in one-to-one correspondence with the first connecting holes and the second connecting holes, respectively.

[0014] Optionally, the insulating pad is formed by injection molding in a space between the first current collector and the second current collector.

[0015] Another purpose of the utility model is to provide a single battery, which comprises the current collector assembly according to any one of the above schemes.

[0016] Still another purpose of the utility model is to provide an electric device, which comprises the single battery according to the above scheme.

[0017] Beneficial effects:

[0018] The current collector assembly is composed of the first current collector, the second current collector and the insulating gasket arranged between the first current collector and the second current collector, the insulating gasket is provided with the first mounting groove and the second mounting groove for mounting the first current collector and the second current collector respectively, the first current collector and the second current collector are arranged on the same horizontal plane with the insulating gasket, the welding of the first current collector, the second current collector, the cover plate and the internal cell tab can be facilitated, the welding efficiency and the welding quality can be improved, the first current collector and the insulating gasket are fixed by the first connecting column and the first connecting hole, the second current collector and the insulating gasket are fixed by the second connecting column and the second connecting hole, and the assembly efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the axonometric view of the current collector assembly provided by the embodiment of the utility model;

[0020] Figure 2 is the exploded view of the current collector assembly provided by the embodiment of the utility model.

[0021] In the drawings:

[0022] 100, insulating gasket; 110, first mounting groove; 120, second mounting groove; 121, main body part; 122, center part; 130, second connecting column; 140, surrounding edge;

[0023] 200, first current collector; 201, first connecting hole; 210, flange part;

[0024] 300, second current collector; 301, second connecting hole; 310, matching part; 320, protruding part; 330, connecting part. DETAILED DESCRIPTION

[0025] The utility model will be further explained in detail in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0026] In the description of the utility model, unless another definite provision and limitation, the term "link", "connection", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements internal communication or two element's mutual action relation. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them. Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature horizontal height is higher than the second feature. The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature horizontal height is less than the second feature.

[0028] In the description of the embodiment, the term "on", "under", "right", etc. orientation or position relation is based on the orientation or position relation shown in the drawing, just for convenient description and simplification operation, and does not indicate or imply the device or element referred to must have a particular orientation, with a particular orientation configuration and operation, therefore cannot be understood as the limitation of the utility model. In addition, the term "first", "second" is just used to distinguish in the description, and has no special meaning.

[0029] Please refer to Figure 1 And Figure 2The current collector assembly comprises an insulating pad 100, a first current collector 200 and a second current collector 300. The insulating pad 100 is provided with a first mounting groove 110 and a second mounting groove 120. The first current collector 200 is mounted in the first mounting groove 110. Either the insulating pad 100 or the first current collector 200 is provided with a first connecting column (not shown in the figure, which has the same structure as the second connecting column 130), and the other is provided with a first connecting hole 201. The first connecting column and the first connecting hole 201 are inserted and connected. The second current collector 300 is mounted in the second mounting groove 120. Either the insulating pad 100 or the second current collector 300 is provided with a second connecting column 130, and the other is provided with a second connecting hole 301. The second connecting column 130 and the second connecting hole 301 are inserted and connected. The first current collector 200, the second current collector 300 and the insulating pad 100 are located in the same horizontal plane. The insulating pad 100 is arranged between the first current collector 200 and the second current collector 300.

[0030] The current collector assembly in the embodiment comprises a first current collector 200, a second current collector 300 and an insulating pad 100 arranged between the first current collector 200 and the second current collector 300. The insulating pad 100 is provided with a first mounting groove 110 and a second mounting groove 120 for mounting the first current collector 200 and the second current collector 300, respectively. The first current collector 200 and the second current collector 300 are located in the same horizontal plane with the insulating pad 100, which facilitates the welding of the first current collector 200, the second current collector 300, the battery cover plate and the internal cell tab, improves the welding efficiency and welding quality, and enables the first current collector 200 and the insulating pad 100 to be fixed by the first connecting column and the first connecting hole 201, and the second current collector 300 and the insulating pad 100 to be fixed by the second connecting column 130 and the second connecting hole 301, which improves the assembly efficiency. The current collector assembly improves the assembly efficiency of the current collector assembly, improves the welding quality between the current collector assembly, the cover plate and the cell, and improves the use reliability of the finally formed single battery.

[0031] Further, the second installation groove 120 comprises a main body part 121 and a center part 122 which are in communication with each other, and the center part 122 is coaxially arranged with the insulating pad 100; the second current collector 300 comprises a protruding part 320 and a matching part 310 which are connected with each other, the protruding part 320 is connected with the center part 122 in a matching mode, the matching part 310 is connected with the main body part 121 in a matching mode, and the matching part 310 is used for welding with the tab of the battery cell. Specifically, the protruding part 320 is used for extending out of the cover plate to electrically connect with external equipment, so as to realize the external discharge of the single battery; the structure of the second installation groove 120 and the second current collector 300 can improve the assembly efficiency of the second current collector 300 and the second installation groove 120, so that the current collector assembly is generally in a whole circular sheet shape, and details are not described herein.

[0032] In the embodiment, the protruding part 320 and the matching part 310 are connected with a connecting part 330, and the connecting part 330 has elasticity. The connecting part 330 has elasticity, and the elastic force of the connecting part 330 can play a buffering role in the radial direction and the vertical direction, so as to play a role of elastic buffering when the second current collector 300 is welded with the battery cover plate, and avoid interference fit between the contact surfaces during welding, thereby increasing the welding yield rate between the current collector assembly and the battery cover plate.

[0033] Please continue to refer to Figure 2 The connecting part 330 is formed by bending a plate material, and the longitudinal section of the connecting part 330 is in a wave shape. In the embodiment, the connecting part 330 is formed by one-step stamping and bending of the plate material through a die, so that the connecting part 330 is in a wave shape, and the wave crest of the connecting part 330 is higher than the surface of the second current collector 300, thereby better playing a buffering role.

[0034] Further, the insulating pad 100 is provided with a surrounding edge 140, the matching part 310 is clamped between the surrounding edge 140 and the second installation groove 120, and the top wall of the surrounding edge 140 is higher than the matching part 310. The surrounding edge 140 is used for playing an insulating role, so as to avoid the battery cover plate from simultaneously contacting the first current collector 200 and the second current collector 300, avoid short circuit phenomenon, further improve the insulating capacity of the insulating pad 100, and improve the use reliability of the single battery.

[0035] Optionally, the first current collector 200 is provided with a turned-up edge part 210, the turned-up edge part 210 is arranged around one end of the first current collector 200 which is away from the insulating pad 100, and the top wall of the turned-up edge part 210 has the same height as the top wall of the surrounding edge 140. The turned-up edge part 210 is arranged to make the top wall of the peripheral edge of the current collector assembly consistent, so as to simultaneously support the battery cover plate, avoid the battery cover plate from being skewed after installation, and improve the subsequent welding quality.

[0036] In the embodiment, the insulating pad 100 is formed by injection molding in the space between the first current collector 200 and the second current collector 300. That is, after the first current collector 200 and the second current collector 300 are formed, the first current collector 200 and the second current collector 300 are placed in an injection mold, the insulating pad 100 is formed by an injection molding process, the first current collector 200 and the second current collector 300 are fixed, and the current collector assembly is formed, which is simpler in process and does not need to be assembled after the insulating pad 100 is produced, thereby improving production efficiency.

[0037] In the embodiment, the first current collector 200 is provided with the first connecting hole 201, the second current collector 300 is provided with the second connecting hole 301, and the first connecting column and the second connecting column 130 are formed after injection molding, which will not be described herein again.

[0038] Optionally, the first connecting column and the first connecting hole 201 are provided with a plurality of one-to-one correspondence, and the second connecting column 130 and the second connecting hole 301 are provided with a plurality of one-to-one correspondence. In the embodiment, the first connecting hole 201 and the second connecting hole 301 are provided with four, which are symmetrically arranged in two groups, thereby further improving the fixing effect between the first current collector 200, the second current collector 300 and the insulating pad 100, and improving the use reliability of the current collector assembly.

[0039] The embodiment also provides a single battery including the current collector assembly of any of the above-mentioned solutions. The single battery can be a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid (or lead-acid) battery, a lithium-ion battery, a polymer lithium-ion battery, etc. The single battery can also be a lithium-ion primary battery, a lithium-sulfur battery, a sodium lithium-ion battery, or a sodium-ion battery, or a magnesium-ion battery, etc., which will not be described herein again. The single battery has the beneficial effects of the current collector assembly of any of the above-mentioned solutions, which will not be described herein again.

[0040] Specifically, when the single battery uses the current collector assembly, the assembly efficiency of the current collector assembly is improved, the welding quality between the current collector assembly and the cover plate and the battery cell is improved, the use reliability of the finally formed single battery is improved, the production cost and the complexity of the production process of the single battery are reduced, and the production efficiency is improved.

[0041] The embodiment also provides a power-using device including the single battery of the above-mentioned solutions. The power-using device can be an electric bicycle, an electric vehicle, a hybrid vehicle, a ship, an energy storage device, etc., as long as it uses electric energy as a source of energy, which will not be described herein again.

[0042] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A current collector assembly, characterized by, The application relates to a current collector assembly. The application relates to a current collector assembly. The application relates to a current collector assembly. The application relates to a current collector assembly.

2. The current collector assembly of claim 1, wherein, The application relates to a current collector assembly.

3. The current collector assembly of claim 2, wherein, The application relates to a current collector assembly.

4. The current collector assembly of claim 3, wherein, The application relates to a current collector assembly.

5. The current collector assembly of claim 2, wherein, The application relates to a current collector assembly.

6. The current collector assembly of claim 5, wherein, The application relates to a current collector assembly.

7. The current collector assembly of any one of claims 1-6, wherein, The application relates to a current collector assembly.

8. The current collector assembly of any one of claims 1-6, wherein, The application relates to a current collector assembly.

9. A single cell characterized by The application relates to a current collector assembly.

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