A 6V lithium battery with a single-side electrode structure

Abstract

The utility model discloses a 6V lithium battery with a single-sided electrode structure, comprising a battery shell, a first pole piece battery unit and a second pole piece battery unit, wherein the first pole piece battery unit and the second pole piece battery unit are respectively fixedly mounted on two sides of the battery shell, the positive pole ears of multiple pole piece batteries of the first pole piece battery unit are all welded on the same positive pole column, the negative pole ears of multiple pole piece batteries of the second pole piece battery unit are all welded on the same negative pole column, the negative pole ears of multiple pole piece batteries of the first pole piece battery unit and the positive pole ears of multiple pole piece batteries of the second pole piece battery unit are all welded on the same connecting pole column, the utility model divides a plurality of pole piece battery units inside a single battery into two groups, designs the positions of the positive pole ears and the negative pole ears respectively, arranges and stacks them and connects them in series, optimizes the internal connection structure, and improves the port voltage of the single battery.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery manufacturing, and specifically relates to a 6V lithium battery with a single-side electrode structure. Background Art

[0002] With the large-scale application of energy storage batteries, the application scenarios are wide and the volume is constantly expanding. Users have higher and higher requirements for the capacity of single cells. Since the voltage of the single cell port is relatively low, usually only between 2V and 5V, for example, the nominal voltage of lithium iron phosphate battery is 3.2V. The capacity of single cells is getting larger and larger. Most general battery application systems require a DC voltage level of tens to hundreds of volts, and even power storage requires thousands of volts. This requires a large number of low-voltage single cells to be connected in series to achieve a relatively high voltage level. The probability of inconsistency and the difficulty of control increase when the number of single cells is too large, and the short board effect increases significantly, which seriously affects the efficiency and life of the battery energy storage system and also brings huge safety risks. At the same time, the single-chip cells in the existing batteries are directly stacked together, and the heat dissipation problem during operation is also a major problem. Utility Model Content

[0003] In order to solve the above defects of the prior art, the utility model proposes a 6V lithium battery with a single-side electrode structure.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A 6V lithium battery with a single-sided electrode structure comprises a battery shell, a first pole piece battery unit and a second pole piece battery unit, wherein the first pole piece battery unit and the second pole piece battery unit are both composed of a plurality of pole piece batteries, the first pole piece battery unit and the second pole piece battery unit are respectively fixedly mounted on both sides of the battery shell, the positive pole tabs of the plurality of pole piece batteries of the first pole piece battery unit are all welded to the same positive pole column, the negative pole tabs of the plurality of pole piece batteries of the second pole piece battery unit are all welded to the same negative pole column, the negative pole tabs of the plurality of pole piece batteries of the first pole piece battery unit and the positive pole tabs of the plurality of pole piece batteries of the second pole piece battery unit are all welded to the same connecting pole column, and the negative pole tabs of the plurality of pole piece batteries of the first pole piece battery unit and the positive pole tabs of the plurality of pole piece batteries of the second pole piece battery unit are cross-stacked on the same straight line.

[0006] Furthermore, the cross-stacked structure of the multiple pole-sheet batteries of the first pole-sheet battery unit and the multiple pole-sheet batteries of the second pole-sheet battery unit is: the connecting pole is connected in sequence from one end to the other end with the negative pole tab of the first pole-sheet battery of the first pole-sheet battery unit, the positive pole tab of the first pole-sheet battery of the second pole-sheet battery unit, the negative pole tab of the second pole-sheet battery of the first pole-sheet battery unit... until all the negative pole tabs of the pole-sheet batteries in the first pole-sheet battery unit and the positive pole tabs of all the pole-sheet batteries in the second pole-sheet battery unit are connected.

[0007] Furthermore, after the positive electrode tabs and negative electrode tabs of the first pole piece battery unit and the second pole piece battery unit are stacked and connected, the spacing distance between the tabs of the first pole piece battery unit and the second pole piece battery unit meets the electrical safety distance requirement.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] The utility model aims at a single cell battery port whose voltage is only a few volts, making the current of the single cell battery very large, which not only aggravates the difficulty of thermal management inside the single cell battery, but also increases the short board effect of the battery energy storage system when a large number of single cells are connected in series to form a battery energy storage system, reduces efficiency and increases safety risks. The utility model divides the many pole piece battery units inside the single cell battery into two groups, designs the positions of the positive pole ear and the negative pole ear respectively, arranges and stacks them in series and connects them in series, optimizes the internal connection structure, increases the port voltage of the single cell battery, and is conducive to significantly reducing the number of single cells in the battery string in the battery energy storage system connected in series, reducing the short board effect and improving the use efficiency and safety of operation. This scheme is not only applicable to lithium iron phosphate batteries, but also to batteries made of other materials such as sodium batteries.

[0010] The present application also increases the spacing between multiple pole piece batteries in the first and second groups of pole piece battery units by staggered stacking, so that there is a certain heat dissipation space between the pole piece batteries, thereby improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of an existing pole piece battery unit;

[0012] Figure 2 It is a schematic diagram of the structure of a 6V lithium battery with a single-side electrode structure;

[0013] Figure 3 It is a schematic diagram of the internal top view structure of the present application.

[0014] Description of reference numerals:

[0015] 1. First pole piece battery unit; 2. Second pole piece battery unit; 11. Positive pole; 12. Connecting pole; 13. Negative pole. DETAILED DESCRIPTION

[0016] As an implementation example, a 6V lithium battery with a single-sided electrode structure is described in conjunction with the accompanying drawings. However, the described embodiment is a partial embodiment of the utility model applied to a 6V lithium battery with a single-sided electrode structure, rather than a complete embodiment.

[0017] Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model; the technology and solutions of the utility model are not limited to the contents given in the examples of the embodiments.

[0018] Referring to Figures 2-3, a 6V lithium battery with a single-sided electrode structure includes a battery shell, a first pole piece battery unit and a second pole piece battery unit, wherein the first pole piece battery unit and the second pole piece battery unit are both composed of multiple pole piece batteries, and the first pole piece battery unit and the second pole piece battery unit are respectively fixedly installed on both sides of the battery shell, the positive pole ears of the multiple pole piece batteries of the first pole piece battery unit are all welded on the same positive pole column, the negative pole ears of the multiple pole piece batteries of the second pole piece battery unit are all welded on the same negative pole column, the negative pole ears of the multiple pole piece batteries of the first pole piece battery unit and the positive pole ears of the multiple pole piece batteries of the second pole piece battery unit are all welded on the same connecting pole, and the negative pole ears of the multiple pole piece batteries of the first pole piece battery unit and the positive pole ears of the multiple pole piece batteries of the second pole piece battery unit are cross-stacked on the same straight line.

[0019] The cross-stacked structure of the multiple pole-sheet batteries of the first pole-sheet battery unit and the multiple pole-sheet batteries of the second pole-sheet battery unit is: the connecting pole is connected in sequence from one end to the other end with the negative pole tab of the first pole-sheet battery of the first pole-sheet battery unit, the positive pole tab of the first pole-sheet battery of the second pole-sheet battery unit, the negative pole tab of the second pole-sheet battery of the first pole-sheet battery unit... until all the negative pole tabs of the pole-sheet batteries in the first pole-sheet battery unit and the positive pole tabs of all the pole-sheet batteries in the second pole-sheet battery unit are connected.

[0020] After the positive electrode tabs and the negative electrode tabs of the first pole piece battery unit and the second pole piece battery unit are stacked and connected, the spacing distance between the tabs of the first pole piece battery unit and the second pole piece battery unit meets the electrical safety distance requirement.

[0021] The 6V lithium battery with a single-sided electrode structure described in the utility model has a voltage of only a few volts at the port of the single cell, which makes the current of the single cell very large, which not only aggravates the difficulty of thermal management inside the single cell, but also increases the short board effect of the battery energy storage system when a large number of single cells are connected in series to form a battery energy storage system, reduces efficiency and increases safety risks. The utility model divides the many pole piece battery units inside the single cell into two groups, designs the positions of the positive pole ear and the negative pole ear respectively, arranges and stacks them in series, optimizes the internal connection structure, and increases the port voltage of the single cell, which is beneficial to significantly reduce the number of single cells in the battery string in the battery energy storage system connected in series, reduces the short board effect, and improves the use efficiency and operation safety. This solution is not only applicable to lithium iron phosphate batteries, but also to batteries made of other materials such as sodium batteries.

[0022] At the same time, there is a certain amount of heat dissipation space between the pole pieces and batteries, which facilitates the control of heat dissipation and increases service life.

[0023] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A 6V lithium battery with a single-side electrode structure, comprising a battery housing, a first pole piece battery unit and a second pole piece battery unit, characterized in that: The first pole piece battery unit and the second pole piece battery unit are both composed of multiple pole piece batteries, and the first pole piece battery unit and the second pole piece battery unit are respectively fixedly installed on both sides of the battery shell, the positive pole ears of the multiple pole piece batteries of the first pole piece battery unit are all welded on the same positive pole column, the negative pole ears of the multiple pole piece batteries of the second pole piece battery unit are all welded on the same negative pole column, the negative pole ears of the multiple pole piece batteries of the first pole piece battery unit and the positive pole ears of the multiple pole piece batteries of the second pole piece battery unit are all welded on the same connecting pole, and the negative pole ears of the multiple pole piece batteries of the first pole piece battery unit and the positive pole ears of the multiple pole piece batteries of the second pole piece battery unit are cross-stacked on the same straight line.

2. According to the 6V lithium battery with a single-side electrode structure as claimed in claim 1, it is characterized in that: The cross-stacked structure of the multiple pole-sheet batteries of the first pole-sheet battery unit and the multiple pole-sheet batteries of the second pole-sheet battery unit is: the connecting pole is connected in sequence from one end to the other end with the negative pole tab of the first pole-sheet battery of the first pole-sheet battery unit, the positive pole tab of the first pole-sheet battery of the second pole-sheet battery unit, the negative pole tab of the second pole-sheet battery of the first pole-sheet battery unit... until all the negative pole tabs of the pole-sheet batteries in the first pole-sheet battery unit and the positive pole tabs of all the pole-sheet batteries in the second pole-sheet battery unit are connected.

3. A 6V lithium battery with a single-side electrode structure according to any one of claims 1-2, characterized in that: After the positive electrode tabs and the negative electrode tabs of the first pole piece battery unit and the second pole piece battery unit are stacked and connected, the spacing distance between the tabs of the first pole piece battery unit and the second pole piece battery unit meets the electrical safety distance requirement.

Images