A lithium-ion battery

Abstract

This utility model provides a lithium-ion battery, relating to the field of lithium-ion battery technology, comprising: a casing, a battery core disposed inside the casing, a cover plate disposed on top of the battery core, and a locking assembly disposed between the battery core and the cover plate for locking and fixing the cover plate to the top of the battery core. The locking assembly includes: an insert plate, a locking block, a connecting block, and a locking groove. An insulating assembly is disposed on the top of the cover plate to prevent large-area short circuits in the lithium-ion battery. The insulating assembly includes: an insulating plate, a slot, and an insulating block. This lithium-ion battery uses a locking assembly to allow the cover plate to be quickly installed on top of the battery core, ensuring the stability of the cover plate and the battery core. The insulating assembly prevents the conductive plate from contacting the cover plate and causing a large-area short circuit in the lithium-ion battery after a short circuit, thus ensuring the stability of the lithium-ion battery.

Description

Technical Field

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

[0002] Lithium-ion batteries are a type of rechargeable battery widely used in portable electronic devices, electric vehicles, and energy storage systems. They store and release energy by moving lithium ions between the positive and negative electrodes. However, existing lithium-ion batteries are prone to continuous vibration during this movement, and the electrode core and terminals, which are connected by welding, may loosen and detach, posing safety hazards and resulting in a short lifespan for lithium-ion batteries.

[0003] To address the aforementioned issues, CN202322388584.1 discloses "a semi-solid lithium-ion battery and a lithium-ion battery," which further secures the contact pieces and electrode pieces with bolts, making them less prone to separation under vibration and reducing safety hazards in the use of lithium-ion batteries. However, this device still has certain drawbacks in actual use. For example, although the device can further secure the contact pieces and electrode pieces with bolts, the installation is done by manually tightening the bolts, which is not only slow but also prone to human error, thus greatly affecting the production efficiency of lithium-ion batteries. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a lithium-ion battery in which the cover plate and the battery core can be quickly snapped together by a snap-fit ​​assembly, and the lithium-ion battery can be prevented from having a large-area short circuit after the conductive plate comes into contact with the cover plate by an insulating assembly.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0006] A lithium-ion battery includes: a casing, a battery core disposed inside the casing, a cover plate disposed on top of the battery core, and a locking assembly disposed between the battery core and the cover plate for locking and fixing the cover plate to the top of the battery core. The locking assembly includes: an insert plate, a locking block, a connecting block, and a locking groove. An insulating assembly is disposed on top of the cover plate to prevent large-area short circuits in the lithium-ion battery. The insulating assembly includes: an insulating plate, a slot, and an insulating block.

[0007] Optionally, two insert plates are provided on both sides of the top of the battery core. A locking block is installed on one side of the outer end of each insert plate. Connecting blocks are installed on both sides of the bottom of the cover plate. A slot is opened on both sides of the outer end of each connecting block. The slot communicates with the locking slot. Fixing plates are installed on both sides of the top of the battery core. The bottom of the four insert plates is connected to two fixing plates respectively. An elastic plate is installed between two adjacent insert plates. The locking assembly composed of the insert plates, locking blocks, connecting blocks and locking slots is used to lock and fix the cover plate to the top of the battery core.

[0008] Optionally, the cover plate has an insulating plate on top, a slot at the bottom of the insulating plate, an insulating block on top of the insulating plate, a liquid injection hole on one side of the top of the cover plate, an explosion-proof valve on one side of the top of the cover plate, vertical plates on both sides of the bottom of the insulating block, the bottom ends of the vertical plates connected to the insulating plate, terminals on both sides of the top of the cover plate, through holes on both sides of the top of the insulating plate, a voltage-conducting plate threaded to the outside of the terminals, a storage cavity inside the outer shell, and the battery core and the cover plate located inside the storage cavity. The insulating assembly consisting of the insulating plate, the slot, and the insulating block is used to prevent large-area short circuits in the lithium-ion battery.

[0009] The beneficial effects of this utility model are:

[0010] The advantage of this utility model is that the cover plate can be quickly installed on the top of the battery core by using a snap-fit ​​assembly, and the stability of the cover plate and the battery core can be ensured.

[0011] Secondly, the insulating components can prevent a large-area short circuit in the lithium-ion battery after the conductive plate comes into contact with the cover plate, thus ensuring the stability of the lithium-ion battery. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the outer shell structure of this utility model.

[0015] Figure 4 This is a schematic diagram of the battery core structure of this utility model.

[0016] Figure 5 This is a schematic diagram of the insert structure of this utility model.

[0017] Figure 6 This is a schematic diagram of the insulating plate structure of this utility model.

[0018] Figure 7 This is a schematic diagram of the cover plate structure of this utility model.

[0019] Figures 1-7 In the middle: 1-outer shell; 101-battery core; 102-cover plate; 2-insertion plate; 201-block; 202-connecting block; 203-slot; 3-slot; 301-fixing plate; 302-elastic plate; 4-insulating plate; 401-groove; 402-insulating block; 5-liquid injection hole; 501-explosion-proof valve; 502-vertical plate; 6-terminal post; 601-through hole; 602-voltage conductive plate; 7-storage cavity. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1-7 As shown, a lithium-ion battery includes: a casing 1, a battery core 101 disposed inside the casing 1, a cover plate 102 disposed on the top of the battery core 101, and a locking assembly disposed between the battery core 101 and the cover plate 102 for locking and fixing the cover plate 102 to the top of the battery core 101. The locking assembly includes: an insert plate 2, a locking block 201, a connecting block 202 and a locking groove 203. An insulating assembly is disposed on the top of the cover plate 102 for preventing large-area short circuits of the lithium-ion battery. The insulating assembly includes: an insulating plate 4, a slot 401 and an insulating block 402.

[0023] The battery core 101 has two insert plates 2 on both sides of its top. A locking block 201 is installed on one side of the outer end of each insert plate 2. Connecting blocks 202 are installed on both sides of the bottom of the cover plate 102. Each connecting block 202 has a slot 203 on both sides of its outer end. When the battery core 101 needs to be connected to the cover plate 102, the insert plate 2 is inserted into the slot 3. When inserted into the slot 3, the insert plate 2 bends towards the elastic plate 302 and presses against it. After the card block 201 is moved to the position of the slot 203, the spring force of the elastic plate 302 will cause the insert plate 2 to spring back to its original position, and the insert plate 2 will move the card block 201 into the slot 203. The card block 201 will engage in the slot 203 to fix the insert plate 2 inside the slot 3, and fix the cover plate 102 to the top of the battery core 101. Then the connecting block 202 will be welded to the outside of the insert plate 2 to ensure the stability between the cover plate 102 and the battery core 101.

[0024] The connecting block 202 has a slot 3 at its bottom, which is connected to the card slot 203. The battery core 101 has a fixing plate 301 installed on both sides of its top. The bottom of the four insert plates 2 are connected to two fixing plates 301 respectively. An elastic plate 302 is installed between two adjacent insert plates 2. Both the insert plates 2 and the elastic plate 302 are made of beryllium copper alloy material. Therefore, the insert plates 2 and the elastic plate 302 have good conductivity and elasticity. Thus, the insert plates 2 and the elastic plate 302 can be reset after deformation.

[0025] The cover plate 102 has an insulating plate 4 on top, a slot 401 at the bottom, and an insulating block 402 on top. When the battery core 101 is short-circuited, the insulating plate 4 and the insulating block 402 can prevent the conductive plate 602 from contacting the cover plate 102 and causing a large-area short circuit in the lithium-ion battery. Both the insulating block 402 and the insulating plate 4 are made of polyimide material, so the insulating block 402 and the insulating plate 4 have good insulation effect.

[0026] The cover plate 102 has an injection hole 5 on one side of its top, and an explosion-proof valve 501 is installed on one side of its top. Vertical plates 502 are installed on both sides of the bottom of the insulating block 402, and the bottom of the vertical plates 502 is connected to the insulating plate 4. When using this device, electrolyte can be injected into the storage cavity 7 through the injection hole 5. The explosion-proof valve 501 will automatically open when the battery core 101 experiences an abnormal situation that causes a rapid rise in temperature and generates a large amount of gas, thus increasing the internal pressure. This allows the gas to be safely discharged, thereby reducing the internal pressure and avoiding the risk of explosion due to excessive pressure. The slot 401 does not affect the use of the explosion-proof valve 501. The insulating block 402 has a round hole on its top to ensure the normal use of the injection hole 5.

[0027] The liquid injection hole 5 and the explosion-proof valve 501 are common structures in the battery field. However, this application does not improve the liquid injection hole 5 and the explosion-proof valve 501. Therefore, this application does not describe the detailed usage method of the liquid injection hole 5 and the explosion-proof valve 501.

[0028] The cover plate 102 has pole posts 6 connected to both sides of its top, and the insulating plate 4 has through holes 601 on both sides of its top. A voltage conductive plate 602 is threaded to the outside of the pole post 6. After the insulating plate 4 is welded to the top of the cover plate 102, the voltage conductive plate 602 is rotated to the outside of the pole post 6. The pole post 6 is used to supply power to external devices or charge the structure. When multiple lithium-ion batteries are connected in series or parallel, the voltage conductive plate 602 can help to distribute the current evenly and avoid local overheating.

[0029] The voltage-conducting plate 602 and the terminal post 6 are commonly used structures in the battery field. However, this application does not improve the voltage-conducting plate 602 and the terminal post 6. Therefore, this application does not describe the detailed usage method of the voltage-conducting plate 602 and the terminal post 6.

[0030] The outer casing 1 has a storage cavity 7 inside, and the battery core 101 and the cover plate 102 are both located inside the storage cavity 7. When using the device, the connected battery core 101 and cover plate 102 are placed inside the storage cavity 7, and then the cover plate 102 is fixed to the inner wall of the storage cavity 7 by laser welding. Next, the insulating plate 4 is placed on the top of the cover plate 102, and the pole 6 protrudes from the top of the insulating plate 4 through the through hole 601. Then the insulating plate 4 is welded to the top of the cover plate 102.

[0031] Working principle:

[0032] When using this device, insert plate 2 is inserted into slot 3. Upon insertion, insert plate 2 bends towards elastic plate 302 and presses against it. Insert plate 2 moves locking block 201 to slot 203, and the elasticity of elastic plate 302 returns insert plate 2 to its original position. This causes insert plate 2 to move locking block 201 into slot 203, where locking block 201 engages with the slot 203, fixing insert plate 2 inside slot 3. Cover plate 102 is then fixed to the top of battery core 101. Connecting block 202 is welded to the outside of insert plate 2 to ensure stability between cover plate 102 and battery core 101. Finally, the connected... The battery core 101 and cover plate 102 are placed inside the storage cavity 7. The cover plate 102 is then fixed to the inner wall of the storage cavity 7 by laser welding. Next, the insulating plate 4 is placed on top of the cover plate 102, and the electrode post 6 protrudes from the top of the insulating plate 4 through the through hole 601. The insulating plate 4 is then welded to the top of the cover plate 102. Electrolyte is then injected into the storage cavity 7 through the injection hole 5. The explosion-proof valve 501 can automatically open when the battery core 101 malfunctions, causing a rapid rise in temperature and the generation of a large amount of gas, which increases the internal pressure. This allows the gas to be safely discharged, thereby reducing the internal pressure and avoiding the risk of explosion due to excessive pressure.

[0033] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0034] The lithium-ion battery provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lithium-ion battery, characterized by, include: Outer shell (1); The outer casing (1) is provided with a battery core (101) inside, and a cover plate (102) is provided on the top of the battery core (101). A locking assembly is provided between the battery electrode core (101) and the cover plate (102) for locking and fixing the cover plate (102) on the top of the battery electrode core (101). The locking assembly includes: an insert plate (2), a locking block (201), a connecting block (202), and a locking groove (203). An insulating component is provided on the top of the cover plate (102) to prevent large-area short circuits of the lithium-ion battery. The insulating component includes an insulating plate (4), a slot (401), and an insulating block (402).

2. The lithium-ion battery of claim 1, wherein, Two insert plates (2) are provided on both sides of the top of the battery core (101). A card block (201) is installed on one side of the outer end of the insert plate (2). A connecting block (202) is installed on both sides of the bottom of the cover plate (102). A slot (203) is opened on both sides of the outer end of the connecting block (202).

3. The lithium-ion battery of claim 2, wherein, The bottom of the connecting block (202) is provided with a slot (3), which is connected to the card slot (203). The top two sides of the battery core (101) are equipped with fixing plates (301). The bottom of the four insert plates (2) are respectively connected to two fixing plates (301). An elastic plate (302) is installed between two adjacent insert plates (2).

4. The lithium-ion battery of claim 1, wherein, An insulating plate (4) is provided on the top of the cover plate (102), a slot (401) is provided on the bottom of the insulating plate (4), and an insulating block (402) is installed on the top of the insulating plate (4).

5. The lithium-ion battery of claim 4, wherein, The cover plate (102) has an injection hole (5) on one side of the top, and an explosion-proof valve (501) is installed on one side of the top of the cover plate (102). Vertical plates (502) are installed on both sides of the bottom of the insulating block (402), and the bottom end of the vertical plate (502) is connected to the insulating plate (4).

6. The lithium-ion battery of claim 4, wherein, The cover plate (102) is connected to pole posts (6) on both sides of the top, and the insulating plate (4) is provided with through holes (601) on both sides of the top. The pole post (6) is threaded to the outside of a voltage-conducting plate (602).

7. The lithium-ion battery of claim 1, wherein, The outer casing (1) has a storage cavity (7) inside, and the battery core (101) and the cover plate (102) are both located inside the storage cavity (7).

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