Lithium-ion battery structure

Abstract

The utility model relates to a lithium ion battery, and the lithium ion battery structure includes: bottom shell, electric core, apron, positive terminal, negative terminal and protection board, and the one end of bottom shell is provided with accommodating groove, and the electric core is provided with positive tab and negative tab, and the apron is used for sealing and closing accommodating groove, and the apron is provided with the first lead -out hole and the second lead -out hole of mutual interval arrangement, and the first end of positive terminal is connected with positive tab, and the first end of negative terminal is connected with negative tab, and the first surface of protection board is connected with the second end of positive terminal and the second end of negative terminal. The protection board plays the protection effect to positive terminal and negative terminal and apron, and the protection board can also pass through the setting circuit layer, avoids the additional external protection circuit structure, and the compactness of structure is good, and the installation structure of lithium ion battery structure subsequent use is simplified, thereby improve the overall structure stability and reliability of lithium ion battery structure.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a lithium-ion battery structure. Background Technology

[0002] With the development and promotion of new energy, the application of lithium-ion battery structures is becoming more and more widespread. As a type of new energy battery, lithium-ion battery structures have advantages such as good cycle performance and high charge and discharge efficiency. They can be used in energy storage, power, digital smart products, etc., with a wide range of applications, bringing many conveniences to people's lives. The industrialization of lithium-ion battery structures has been rapidly improved, and the performance and quality of lithium-ion battery structures are also improving rapidly to meet the increasingly high performance and application requirements of application clients. As a mainstream new energy battery, the research on lithium-ion battery structures will gradually deepen.

[0003] However, in existing lithium-ion battery structures, the positive and negative terminals of the cell are typically mounted on a cover plate with protruding terminals, allowing them to be led out for easy connection to a power source or charger for charging and discharging. However, the cover plate structure of existing lithium-ion battery structures has poor stability and is easily damaged during processing or use. Furthermore, the positive and negative output terminals of the cell usually require external protection circuits before being connected to the power source or charger. This makes the installation and use of lithium-ion battery structures complex and cumbersome, resulting in poor reliability. In other words, the overall structural stability and reliability of lithium-ion battery structures need improvement. Therefore, it is necessary to provide a lithium-ion battery structure with better structural stability and reliability. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a lithium-ion battery structure.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A lithium-ion battery structure, comprising:

[0007] A bottom shell, one end of which has a receiving groove;

[0008] A battery cell is disposed in the receiving groove, and the battery cell is provided with a positive electrode tab and a negative electrode tab, the positive electrode tab and the negative electrode tab being arranged alternately;

[0009] A cover plate is connected to the bottom shell and is used to seal and close the receiving groove. The cover plate has a first outlet hole and a second outlet hole that are spaced apart from each other. The first outlet hole and the second outlet hole are respectively provided through the two end faces of the cover plate.

[0010] A positive terminal is disposed in the first outlet hole, and the first end of the positive terminal is connected to the positive electrode tab;

[0011] The negative terminal is disposed within the second outlet hole, and its first end is connected to the negative electrode tab; and

[0012] A protective plate, the first side of which is connected to the second end of the positive terminal and the second end of the negative terminal.

[0013] In one embodiment, a first conductive element and a second conductive element are provided on the first side of the protection plate, and the first conductive element and the second conductive element are electrically connected to the second end of the positive terminal and the second end of the negative terminal, respectively.

[0014] In one embodiment, the first conductive element is provided with a first extension, which at least partially covers the positive terminal.

[0015] In one embodiment, the second conductive element is provided with a second extension, which at least partially covers the negative terminal.

[0016] In one embodiment, a first sealing ring is further included, which is sleeved on the positive terminal and connected to the inner wall of the first outlet hole.

[0017] In one embodiment, a second sealing ring is further included, which is sleeved on the negative terminal and connected to the inner wall of the second outlet hole.

[0018] In one embodiment, the first sealing ring is provided with a first extension portion, which covers the first extension portion.

[0019] In one embodiment, the second sealing ring is provided with a second extension portion, which covers the second extension portion.

[0020] In one embodiment, the protection board is a circuit board.

[0021] In one embodiment, electronic components are disposed on the second side of the protective plate.

[0022] The advantages and beneficial effects of this utility model compared to the prior art are as follows:

[0023] This invention features a bottom shell with a receiving groove, within which the battery cell is housed. A cover plate is then placed on the bottom shell to seal the receiving groove. The cover plate has a first outlet hole and a second outlet hole communicating with the receiving groove, used to house the positive and negative terminals. The positive and negative terminals are respectively welded to the positive and negative electrode tabs of the battery cell, serving as the positive and negative output terminals of the battery cell. A protective plate is then provided, covering the positive and negative terminals, providing support and protection. This design prevents external forces from directly damaging the positive and negative terminals and the cover plate, thus protecting them and improving the stability of the positive and negative output terminals of the battery cell. Simultaneously, the protection board can provide protection circuitry for the positive and negative terminals by setting up a circuit layer, eliminating the need for additional external protection circuitry. This design also results in a compact structure and simplifies the subsequent installation of the lithium-ion battery, thereby improving the overall structural stability and reliability of the lithium-ion battery. Attached Figure Description

[0024] Figure 1 A schematic diagram of a lithium-ion battery structure according to one embodiment;

[0025] Figure 2 This is a three-dimensional exploded view of a lithium-ion battery structure according to one embodiment.

[0026] Figure 3 This is a cross-sectional schematic diagram of a lithium-ion battery structure according to one embodiment. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0028] Please see Figure 1 , Figure 2 and Figure 3In one embodiment, a lithium-ion battery structure 10 is provided, including a bottom shell 100, a battery cell 200, a cover plate 300, a positive terminal 400, a negative terminal 500, and a protection plate 600. A receiving groove 110 is formed at one end of the bottom shell 100. The battery cell 200 is disposed within the receiving groove 110, and the battery cell 200 is provided with a positive electrode tab 210 and a negative electrode tab 220, which are spaced apart from each other. The cover plate 300 is connected to the bottom shell 100, and the cover plate 300 is used to seal and close the receiving groove 110. The cover plate 300 has a first outlet hole 310 and a second outlet hole 320 that are spaced apart from each other, and the first outlet hole 310 and the second outlet hole 320 respectively penetrate both end faces of the cover plate 300. The positive terminal 400 is disposed within the first outlet hole 310, and its first end is connected to the positive electrode tab 210. The negative terminal 500 is disposed within the second outlet hole 320, and its first end is connected to the negative electrode tab 220. The first surface of the protective plate 600 is connected to the second ends of both the positive terminal 400 and the negative terminal 500.

[0029] It should be noted that the bottom shell 100 can be cylindrical, square, or irregularly shaped to prepare lithium-ion battery structures of different shapes suitable for different application scenarios. One end of the bottom shell 100 is provided with a receiving groove 110. The shape of the battery cell 200 is adapted to the shape of the receiving groove 110. The battery cell 200 can be a stacked battery cell 200 or a wound battery cell 200. The battery cell 200 is housed in the receiving groove 110. The battery cell 200 has a positive electrode tab 210 and a negative electrode tab 220 as its positive and negative output terminals. In this embodiment... In the battery cell 200, the positive electrode tab 210 and the negative electrode tab 220 are led out from the same end near the cover plate 300. That is to say, after the positive electrode tab 210 and the negative electrode tab 220 are led out, they are stacked on the end of the battery cell 200 near the cover plate 300. A gap is left between the positive electrode tab 210 and the negative electrode tab 220 to avoid direct contact and short circuit. Electrolyte is also injected into the receiving tank 110. The electrolyte is used to wet the battery cell 200 and provide a channel for the movement of lithium ions between the positive and negative electrode plates of the battery cell 200, so as to ensure the normal charging and discharging of the lithium-ion battery structure.

[0030] Furthermore, the cover plate 300 is fitted onto the bottom shell 100, and the cover plate 300 is sealed to the bottom shell 100 by welding. The cover plate 300 is used to seal and close the receiving groove 110. The cover plate 300 has a first outlet hole 310 and a second outlet hole 320 at the positions corresponding to the positive electrode tab 210 and the negative electrode tab 220, respectively. The first outlet hole 310 and the second outlet hole 320 are respectively connected to the receiving groove 110. The first outlet hole 310 and the second outlet hole 320 are used to accommodate the positive terminal 400 and the negative terminal 500, respectively. The positive terminal 400 extends into the receiving groove 110 through the first outlet hole 310. The positive terminal 400 is welded to the positive electrode tab 210, thus achieving electrical connection between the positive terminal 400 and the positive electrode tab 210. Similarly, the negative terminal 500 extends into the receiving groove 110 through the second outlet hole 320 and is welded to the negative electrode tab 220, thus achieving electrical connection with the negative electrode tab 220. This allows the positive terminal 400 and the negative terminal 500 to serve as the positive and negative output terminals of the cell 200, respectively. The positive terminal 400 and the negative terminal 500 are sealed to the inner walls of the first outlet hole 310 and the second outlet hole 320, respectively, thus sealing and encapsulating to obtain the lithium-ion battery structure. To ensure the overall sealing of the lithium-ion battery structure, a protection plate 600 is installed. The protection plate 600 and the cover plate 300 are arranged parallel to each other. The protection plate 600 covers the positive terminal 400 and the negative terminal 500. The positive terminal 400 and the negative terminal 500 can conduct electricity to the second surface of the protection plate 600 through conductive wires or conductive layers. External electrical devices can be electrically connected to the second surface of the protection plate 600, thereby achieving electrical connection with the positive and negative terminals of the battery cell 200 and realizing the power supply function of the lithium-ion battery structure. The protection plate 600 also provides support and protection, preventing external forces from affecting the battery. The protection board directly damages the positive terminal 400, the negative terminal 500, and the cover plate 300, thus protecting them and improving the stability of the positive and negative output terminals of the cell 200. Simultaneously, by setting up a circuit layer, the protection board can provide protection circuitry for the positive and negative terminals while maintaining electrical connection with them, avoiding the need for additional external protection circuitry. This results in a compact structure and simplifies the subsequent installation of the lithium-ion battery, thereby improving the overall structural stability and reliability of the lithium-ion battery.

[0031] As a further preferred embodiment, in one embodiment, the protection board 600 is a circuit board. It is understood that a circuit board is a plate-shaped structure with corresponding conductive circuit layers that can be set according to circuit design requirements, and can be used to support and install corresponding power supply or power consumption units. In this embodiment, the protection board 600 is a circuit board. The first and second sides of the protection board 600 can be respectively provided with conductive layers that are electrically connected to the positive terminal 400, the negative terminal 500, and the power consumption device, thereby realizing the circuit connection between the positive terminal 400, the negative terminal 500, and the power consumption device. While protecting the positive terminal 400 and the negative terminal 500, it also facilitates the circuit connection between the positive terminal 400, the negative terminal 500, and the power consumption device, thus offering good practicality.

[0032] Please see Figure 2 and Figure 3 In one embodiment, the first side of the protection plate 600 is provided with a first conductive element 610 and a second conductive element 620, and the first conductive element 610 and the second conductive element 620 are electrically connected to the second end of the positive terminal 400 and the second end of the negative terminal 500, respectively. Understandably, the first side of the protection plate 600 is provided with a first conductive element 610 and a second conductive element 620 made of metal, which are adapted to the positions of the positive terminal 400 and the negative terminal 500. The first conductive element 610 and the second conductive element 620 are electrically connected to the positive terminal 400 and the negative terminal 500 respectively through a welding process, which can realize the positioning electrical connection with the positive terminal 400 and the negative terminal 500 and realize the circuit connection. The first conductive element 610 and the second conductive element 620 can conduct the circuit to the second side of the protection plate 600 through the conductive layer provided in the middle of the protection plate 600. The external electrical device is electrically connected to the battery cell 200 through the electrical connection with the second side of the protection plate 600. The protection plate 600 can ensure the protection of the positive terminal 400 and the negative terminal 500, and ensure the overall structural stability and safety performance of the lithium-ion battery structure.

[0033] Please see Figure 2 and Figure 3In one embodiment, the first conductive element 610 is provided with a first extension 611, which at least partially covers the positive terminal 400. The second conductive element 620 is provided with a second extension 621, which at least partially covers the negative terminal 500. Understandably, in this embodiment, by providing a first extension 611 and a second extension 621, which are respectively adapted to the shapes of the positive terminal 400 and the negative terminal 500, the first extension 611 and the second extension 621 can fit snugly over the outer sidewalls of the positive terminal 400 and the negative terminal 500. On the one hand, this increases the contact area between the first conductive element 610 and the second conductive element 620 and the positive terminal 400 and the negative terminal 500, respectively, which is beneficial to better achieve the conductive connection between the first conductive element 610 and the second conductive element 620 and the positive terminal 400 and the negative terminal 500, respectively. On the other hand, the first extension 611 and the second extension 621 can better protect the positive terminal 400 and the negative terminal 500, further improving the structural stability and safety performance of the lithium-ion battery structure.

[0034] Please see Figure 2 and Figure 3 In one embodiment, a first sealing ring 700 is further included. The first sealing ring 700 is sleeved on the positive terminal 400 and is connected to the inner wall of the first outlet hole 310. It is understood that by providing the first sealing ring 700, which can be a rubber sealing ring, a sealed connection can be achieved between the positive terminal 400 and the inner wall of the first outlet hole 310. In this embodiment, the first sealing ring 700 extends to the outer edge of the first outlet hole 310, ensuring a complete seal of the first outlet hole 310 and ensuring the overall sealing performance of the lithium-ion battery structure.

[0035] Please see Figure 2 and Figure 3 In one embodiment, a second sealing ring 800 is further included. The second sealing ring 800 is sleeved on the negative terminal 500 and is connected to the inner wall of the second outlet hole 320. It is understood that, similarly, by providing the second sealing ring 800, which can be a rubber sealing ring, a sealed connection can be achieved between the negative terminal 500 and the inner wall of the second outlet hole 320. In this embodiment, the second sealing ring 800 extends to the outer edge of the second outlet hole 320, ensuring a complete seal of the second outlet hole 320 and ensuring the overall sealing performance of the lithium-ion battery structure.

[0036] Please see Figure 2 and Figure 3In one embodiment, the first sealing ring 700 is provided with a first extension portion 710, which covers the outside of the first extension portion 611. It is understood that the first sealing ring 700, near the protective plate 600, has a first extension portion 710 that matches the shape of the first extension portion 611. The first extension portion 710 fits snugly around the outside of the first extension portion 611, providing insulation and protection for the first extension portion 611, and also providing some shock absorption, further improving the overall structural stability and safety performance of the lithium-ion battery structure.

[0037] Please see Figure 2 and Figure 3 In one embodiment, the second sealing ring 800 is provided with a second extension portion 810, which covers the second extension portion 621. Similarly, the end of the second sealing ring 800 near the protective plate 600 is provided with a second extension portion 810 that matches the shape of the second extension portion 621. The second extension portion 810 fits snugly over the outside of the second extension portion 621, providing insulation and protection for the second extension portion 621, and also providing some shock absorption, further improving the overall structural stability and safety performance of the lithium-ion battery structure.

[0038] Please see Figure 1 and Figure 2 In one embodiment, an electronic component 630 is disposed on the second side of the protection board 600. It is understood that since the protection board 600 is a circuit board, the second side of the protection board 600 can be provided with circuitry and the electronic component 630 can be electrically connected via surface mount technology. This can increase the functionality of the lithium-ion battery structure. For example, the electronic component 630 includes a mini-breaker (over-temperature protector), which enables the protection board 600 to have temperature protection functionality, improves the circuit safety of the lithium-ion battery structure, and further enhances the overall safety performance of the lithium-ion battery structure.

[0039] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A lithium-ion battery structure, characterized by, include: A bottom shell, one end of which has a receiving groove; A battery cell is disposed in the receiving groove, and the battery cell is provided with a positive electrode tab and a negative electrode tab, the positive electrode tab and the negative electrode tab being arranged alternately; A cover plate is connected to the bottom shell and is used to seal and close the receiving groove. The cover plate has a first outlet hole and a second outlet hole that are spaced apart from each other. The first outlet hole and the second outlet hole are respectively provided through the two end faces of the cover plate. A positive terminal is disposed in the first outlet hole, and the first end of the positive terminal is connected to the positive electrode tab; The negative terminal is disposed within the second outlet hole, and its first end is connected to the negative electrode tab; and A protective plate, the first side of which is connected to the second end of the positive terminal and the second end of the negative terminal.

2. The lithium-ion battery structure of claim 1, wherein, The first side of the protection plate is provided with a first conductive element and a second conductive element, and the first conductive element and the second conductive element are electrically connected to the second end of the positive terminal and the second end of the negative terminal, respectively.

3. The lithium-ion battery structure of claim 2, wherein, The first conductive element is provided with a first extension portion, which at least partially covers the positive terminal.

4. The lithium-ion battery structure of claim 3, wherein, The second conductive element is provided with a second extension, which at least partially covers the negative terminal.

5. The lithium-ion battery structure of claim 4, wherein, It also includes a first sealing ring, which is sleeved on the positive terminal and connected to the inner wall of the first outlet hole.

6. The lithium-ion battery structure of claim 4, wherein, It also includes a second sealing ring, which is fitted onto the negative terminal and connected to the inner wall of the second outlet hole.

7. The lithium-ion battery structure of claim 5, wherein, The first sealing ring is provided with a first extension portion, which covers the first extension portion.

8. The lithium-ion battery structure according to claim 6, characterized in that, The second sealing ring is provided with a second extension portion, which covers the second extension portion.

9. The lithium-ion battery structure according to any one of claims 1 to 8, characterized in that, The protection board is a circuit board.

10. The lithium-ion battery structure according to claim 9, characterized in that, Electronic components are provided on the second side of the protection plate.

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