Novel battery cell isolation structure in lithium battery pack

Abstract

The utility model discloses a novel battery cell isolation structure in a lithium battery pack, which relates to the technical field of lithium battery insulation and comprises a fixed base and a fixed connecting plate on one side of the fixed base, a limiting connecting plate is arranged on one side of the fixed base, and a plurality of limiting restraining grooves are formed in the limiting connecting plate. The fixed battery cells are placed between every two elastic buffer plates, and are connected through the insertion fixing blocks on the elastic buffer plates and the insertion fixing grooves in the constraint connecting plates, so that the stability of the battery cells in the battery pack is ensured, and heat dissipation holes are formed in the elastic buffer plates, so that the internal temperature of the battery is reduced, and the performance and the safety of the battery are improved; in the use process of the lithium battery, when the battery cell expands due to heat generated by passing of current, a space can be provided for expansion of the battery cell, internal pressure is prevented from acting on the battery cell top cover in a concentrated and upward manner, the pressure borne by a welding seam of the battery cell top cover is effectively relieved, the risk of cracking of the welding seam is reduced, and the safety of the battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery insulation technology, and in particular to a novel cell isolation structure within a lithium battery pack. Background Technology

[0002] With the widespread use of lithium batteries, from portable electronic devices to electric vehicles, the safety and lifespan of lithium batteries have become a major concern. The assembly quality of lithium batteries largely determines their performance. However, existing lithium battery assembly technologies have many hidden dangers, which have seriously affected the safety and lifespan of batteries.

[0003] During use, lithium batteries generate heat due to the continuous flow of current, which causes internal expansion. However, in existing structures, there is no clearance between the battery cell and the epoxy resin rigid plate. When the battery cell expands, the internal pressure cannot be effectively dispersed and can only act upwards on the top cover of the battery cell. Over a long period of time, the pressure generated by the expansion of the battery cell can easily cause the weld to crack. This can lead to damage to the internal structure of the battery, loss of power supply, and disruption of normal equipment use. In severe cases, it can cause serious accidents such as battery fire or even explosion, resulting in irreparable losses.

[0004] Meanwhile, in traditional lithium battery structures, the cell and the epoxy resin rigid plate are in direct contact, resulting in a hard-on-hard contact without the necessary elastic buffer design. In applications such as electric vehicles, high-frequency vibrations are generated during vehicle operation, which are continuously transmitted to the battery. Since there is no buffer between the cell and the epoxy resin rigid plate, the battery casing directly bears the impact force from the cell, accelerating the wear of the battery casing. Over time, the wear of the battery casing may lead to a decrease in its protective performance, exposing the internal cells to greater safety risks, such as electrolyte leakage. In severe cases, it may even cause a battery short circuit, threatening the safety of the entire device or vehicle.

[0005] As the application of lithium batteries continues to expand in various fields, the requirements for the safety and lifespan of lithium batteries are becoming increasingly stringent. In order to ensure the reliable operation of lithium batteries, it is urgent to improve the existing lithium battery structure and develop a structure that avoids direct contact between the cell and the rigid plate and reserves space for cell expansion, thereby improving the safety performance of lithium batteries. Utility Model Content

[0006] In view of the increasingly stringent requirements for the safety and lifespan of lithium batteries as their applications expand in various fields, it is urgent to improve the existing lithium battery structure in order to ensure the reliable operation of lithium batteries. This leads to the development of a structure that avoids direct contact between the battery cell and the rigid plate and reserves space for cell expansion, thereby improving the safety performance of lithium batteries. This utility model is proposed.

[0007] Therefore, the purpose of this utility model is to place the fixed battery cell between every two elastic buffer plates, and connect them using the plug-in fixing blocks on the elastic buffer plates and the plug-in fixing slots on the constraint connecting plates, thus ensuring the stability of the battery cell within the battery pack. The heat dissipation holes opened on the elastic buffer plates reduce the internal temperature of the battery, improving the battery's performance and safety. During the use of the lithium battery, when the battery cell expands due to the heat generated by the current, this provides space for the expansion of the battery cell, preventing the internal pressure from concentrating upwards on the top cover of the battery cell, effectively relieving the pressure on the weld of the top cover of the battery cell, reducing the risk of weld cracking, and improving the safety of the battery.

[0008] To solve the above technical problems, this utility model provides the following technical solution: a novel cell isolation structure inside a lithium battery pack, including a fixed base and a fixed connecting plate on one side of the fixed base, wherein a limiting connecting plate is provided on one side of the fixed base, and multiple limiting constraint grooves are provided on the limiting connecting plate;

[0009] An insulating assembly includes multiple elastic buffer plates installed between the fixed connecting plate and the limiting connecting plate. The multiple elastic buffer plates are arranged at equal intervals, and an insulating fixing plate is provided between two elastic buffer plates.

[0010] The fixing component includes two constraint connecting plates installed between the fixing connecting plate and the limiting connecting plate. Each constraint connecting plate is located on one side of multiple elastic buffer plates, and each constraint connecting plate has two constraint fixing plates on one side.

[0011] As a preferred embodiment of the novel lithium battery pack cell isolation structure of this utility model, the fixed base has two fixed constraint grooves on one side, each elastic buffer plate has a fixed constraint block on one side, and each fixed constraint block is located inside the fixed constraint groove.

[0012] As a preferred embodiment of the novel lithium battery pack cell isolation structure of this utility model, each of the elastic buffer plates has multiple heat dissipation holes, each of the elastic buffer plates is provided with a plug-in fixing block, and a fixed cell is provided between every two elastic buffer plates.

[0013] As a preferred embodiment of the novel lithium battery pack cell isolation structure of this utility model, each of the constraint connecting plates is attached to a plurality of fixed cells on one side, and a plurality of insertion fixing slots are opened on each of the constraint connecting plates, and each insertion fixing block is inserted into the inner side of the corresponding insertion fixing slot.

[0014] As a preferred embodiment of the novel lithium battery pack cell isolation structure of this utility model, each of the constraint fixing plates is provided with a constraint fixing groove, the fixing connection plate is provided with multiple insertion constraint grooves, and each of the insertion constraint grooves is provided with an insertion stud on its inner side.

[0015] As a preferred embodiment of the novel lithium battery pack cell isolation structure of this utility model, the limiting connecting plate is provided with a plurality of plug-in nuts on one side, and each plug-in stud is suspended after passing through the limiting constraint groove on the inner side of the limiting connecting plate.

[0016] As a preferred embodiment of the novel lithium battery pack cell isolation structure of this utility model, each of the plug-in studs is inserted into the inner side of the corresponding plug-in nut at one end, and each of the constraint fixing plates is sleeved on the corresponding plug-in stud through the constraint fixing groove.

[0017] The beneficial effects of this utility model are:

[0018] The fixed battery cells are placed between every two elastic buffer plates and connected using the plug-in fixing blocks on the elastic buffer plates and the plug-in fixing slots on the constraint connecting plates, ensuring the stability of the battery cells within the battery pack. The heat dissipation holes on the elastic buffer plates reduce the internal temperature of the battery, improving battery performance and safety. During the use of lithium batteries, when the battery cells expand due to the heat generated by the current, the buffer plates provide space for the expansion of the battery cells, preventing internal pressure from concentrating upwards on the top cover of the battery cells. This effectively alleviates the pressure on the weld seams of the top cover of the battery cells, reduces the risk of weld seam cracking, and improves battery safety. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a partial structural diagram of the present utility model.

[0022] Figure 3 This is a top view of the structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the fixed base structure of this utility model.

[0024] Figure 5This is a schematic diagram of the elastic buffer plate structure of this utility model.

[0025] Figure 6 This is a schematic diagram of the constraint connection plate structure of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Fixed base; 2. Fixed connecting plate; 3. Fixed constraint groove; 4. Insertion constraint groove; 5. Elastic buffer plate; 6. Fixed constraint block; 7. Insulating fixing plate; 8. Insertion fixing block; 9. Heat dissipation hole; 10. Fixed battery cell; 11. Constraint connecting plate; 12. Insertion fixing groove; 13. Constraint fixing plate; 14. Constraint fixing groove; 15. Insertion stud; 16. Insertion nut; 17. Limiting connecting plate; 18. Limiting constraint groove. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Example 1

[0030] Reference Figure 1-4 This is the first embodiment of the present utility model, which provides a novel cell isolation structure inside a lithium battery pack, including a fixed base 1 and a fixed connecting plate 2 on one side of the fixed base 1. A limiting connecting plate 17 is provided on one side of the fixed base 1, and multiple limiting constraint grooves 18 are opened on the limiting connecting plate 17. Multiple elastic buffer plates 5 are installed between the fixed connecting plate 2 and the limiting connecting plate 17. The multiple elastic buffer plates 5 are arranged at equal intervals. An insulating fixing plate 7 is provided between two elastic buffer plates 5. Two fixing constraint grooves 3 are opened on one side of the fixed base 1. A fixing constraint block 6 is provided on one side of each elastic buffer plate 5. Each fixing constraint block 6 is located inside the fixing constraint groove 3.

[0031] Each elastic buffer plate 5 has multiple heat dissipation holes 9, each elastic buffer plate 5 has a plug-in fixing block 8, and a fixing cell 10 is provided between every two elastic buffer plates 5. One side of each constraint connecting plate 11 is attached to multiple fixing cells 10, and each constraint connecting plate 11 has multiple plug-in fixing slots 12. Each plug-in fixing block 8 is plugged into the inner side of the corresponding plug-in fixing slot 12.

[0032] Example 2

[0033] Reference Figure 3-6This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that it includes two constraint connecting plates 11 installed between the fixed connecting plate 2 and the limiting connecting plate 17. Each constraint connecting plate 11 is located on one side of multiple elastic buffer plates 5. Each constraint connecting plate 11 has two constraint fixing plates 13 on one side. Each constraint fixing plate 13 has a constraint fixing groove 14. The fixed connecting plate 2 has multiple insertion constraint grooves 4. Each insertion constraint groove 4 has an insertion stud 15 inside.

[0034] The limiting connecting plate 17 has multiple plug nuts 16 on one side. Each plug stud 15 has one end that passes through the limiting constraint groove 18 inside the limiting connecting plate 17 and is suspended. Each plug stud 15 has one end that is plugged into the inner side of the corresponding plug nut 16. Each constraint fixing plate 13 is sleeved on the corresponding plug stud 15 through the constraint fixing groove 14.

[0035] During the assembly of the lithium battery pack, the fixed base 1 is first placed in the designated position to provide stable support for the entire cell isolation structure. The fixed constraint groove 3 on one side of the fixed base 1 is used to install the elastic buffer plate 5. The fixed constraint block 6 on one side of the elastic buffer plate 5 cooperates with the fixed constraint groove 3 to achieve the initial positioning of the elastic buffer plate 5 on the fixed base 1, ensuring that its position is accurate and stable. The elastic buffer plate 5 is made of silicone, which has good elasticity, chemical stability, high temperature resistance and insulation, and can well meet the requirements of the cell isolation structure inside the lithium battery pack.

[0036] The fixed battery cell 10 is placed between every two elastic buffer plates 5 and connected by the plug-in fixing block 8 on the elastic buffer plate 5 and the plug-in fixing slot 12 on the constraint connecting plate 11. One side of the constraint connecting plate 11 is in contact with multiple fixed battery cells 10. When the plug-in fixing block 8 is inserted into the plug-in fixing slot 12, it can further fix the fixed battery cell 10. At the same time, the constraint connecting plate 11 also restricts the horizontal movement of the fixed battery cell 10, ensuring the stability of the battery cell in the battery pack.

[0037] During the process of fixing the battery cell 10, the insulating fixing plate 7 is located between the two elastic buffer plates 5, which plays an insulating role, prevents short circuits between the battery cells, and ensures the normal operation of the battery. The multiple elastic buffer plates 5 are arranged at equal intervals, which not only provides a stable support environment for fixing the battery cell 10, but also forms a certain gap between the battery cells, which helps to dissipate heat. The heat dissipation holes 9 opened on the elastic buffer plates 5 further enhance the heat dissipation effect, which can dissipate the heat generated by the battery cell during operation in a timely manner, reduce the internal temperature of the battery, and improve the performance and safety of the battery.

[0038] The constraint fixing plate 13, the plug-in stud 15, and the plug-in nut 16 in the fixing assembly work together to fasten the entire structure. The plug-in constraint groove 4 on the fixing connection plate 2 is provided with the plug-in stud 15. The plug-in nut 16 on one side of the limiting connection plate 17 cooperates with the plug-in stud 15 to tightly connect the fixing connection plate 2, the elastic buffer plate 5, the insulating fixing plate 7, the constraint connection plate 11, and the limiting connection plate 17 together to form a stable overall structure.

[0039] During the use of lithium batteries, when the battery cell expands due to the heat generated by the current, the elastic buffer plate 5 can play an elastic buffering role. Because the elastic buffer plate 5 has a certain degree of elasticity, and there is a certain gap between the elastic buffer plate 5 and the insulating fixing plate 7, space is provided for the expansion of the battery cell, avoiding the internal pressure from being concentrated upward on the top cover of the battery cell, effectively relieving the pressure on the weld of the top cover of the battery cell, and reducing the risk of weld cracking.

[0040] The remaining structure is the same as that in Example 1.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A novel cell isolation structure within a lithium battery pack, characterized in that: It includes a fixed base (1) and a fixed connecting plate (2) on one side of the fixed base (1). A limiting connecting plate (17) is provided on one side of the fixed base (1). Multiple limiting constraint grooves (18) are opened on the limiting connecting plate (17). The insulating assembly includes multiple elastic buffer plates (5) installed between the fixed connecting plate (2) and the limiting connecting plate (17), the multiple elastic buffer plates (5) are arranged at equal intervals, and an insulating fixing plate (7) is provided between two elastic buffer plates (5). The fixing component includes two constraint connecting plates (11) installed between the fixing connecting plate (2) and the limiting connecting plate (17). Each constraint connecting plate (11) is located on one side of multiple elastic buffer plates (5), and each constraint connecting plate (11) has two constraint fixing plates (13) on one side.

2. The novel lithium battery pack cell isolation structure according to claim 1, characterized in that: Two fixed constraint grooves (3) are opened on one side of the fixed base (1), and a fixed constraint block (6) is provided on one side of each elastic buffer plate (5), and each fixed constraint block (6) is located inside the fixed constraint groove (3).

3. The novel lithium battery pack cell isolation structure according to claim 2, characterized in that: Each of the elastic buffer plates (5) has multiple heat dissipation holes (9), each of the elastic buffer plates (5) is provided with a plug-in fixing block (8), and a fixing cell (10) is provided between every two elastic buffer plates (5).

4. The novel lithium battery pack cell isolation structure according to claim 3, characterized in that: Each of the constraint connection plates (11) is attached to one side of multiple fixed cells (10), and multiple insertion fixing slots (12) are opened on each of the constraint connection plates (11), and each insertion fixing block (8) is inserted into the inner side of the corresponding insertion fixing slot (12).

5. The novel lithium battery pack cell isolation structure according to claim 4, characterized in that: Each of the constraint fixing plates (13) has a constraint fixing groove (14), and the fixing connection plate (2) has multiple insertion constraint grooves (4), and each of the insertion constraint grooves (4) has an insertion stud (15) inside.

6. The novel lithium battery pack cell isolation structure according to claim 5, characterized in that: The limiting connecting plate (17) has multiple plug nuts (16) on one side, and each plug stud (15) is suspended after passing through the limiting constraint groove (18) inside the limiting connecting plate (17) at one end.

7. The novel lithium battery pack cell isolation structure according to claim 6, characterized in that: One end of each of the plug studs (15) is inserted into the inner side of the corresponding plug nut (16), and each of the constraint fixing plates (13) is sleeved on the corresponding plug stud (15) through the constraint fixing groove (14).

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