Battery cell with side plate opening

Abstract

The utility model belongs to lithium battery technical field discloses a kind of battery shell and battery monomer of side plate trepanning, the shell is used to support multiple side-by-side arrangement's electric core, including top plate, a pair of end plate and a pair of side plate;The top plate is equipped with the electric terminal of the connection with the electric core;A pair of the end plate clamping is in the front and back of multiple electric core;A pair of side plate is located in the left and right of electric core;At least one side plate is equipped with at least one group of holes;The group of holes includes two single holes, and upper and lower arrangement, one is glue injection hole, another is observation hole;Buffer frame is pasted in the inside of side plate;The group of holes is located in the buffer frame.The utility model glue injection hole is on side plate, far from conductive component, and glue injection operation is convenient, not easy to make mistake.Before glue injection, electric core has been clamped and fixed by end plate, to facilitate first detection and then glue injection, avoid battery damage caused by disassembly and assembly.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery technology and relates to a battery casing with side plate openings and a battery cell. Background Technology

[0002] Lithium-ion batteries are typically manufactured using a glue-filling process. Adding glue inside the battery effectively fills gaps, ensuring a tight bond between internal components and improving battery stability. Glue filling also effectively reduces damage to the cells caused by external impacts, vibrations, or temperature changes. Furthermore, by selecting glue materials with thermal conductivity, the heat generated by the battery can be quickly conducted to the external environment, maintaining a stable battery temperature. Existing glue-filling holes are usually located at the top of the battery, as shown in patents CN 221108750U ("Battery Pack Glue-Filling Tooling") and CN222581402U ("A Battery Housing for Easy Glue Filling"). The problems with placing the glue injection hole on the top of the battery are as follows: First, the top of the battery usually has electrodes, and special tooling is required to ensure that the glue enters the glue cavity accurately. Furthermore, the amount of glue injected is difficult to observe, and any overflow is difficult to clean, making operation inconvenient. Second, the assembly process uses the battery casing to clamp and fix multiple cells to ensure their stability. Battery casings with top-mounted glue injection holes usually have fixed plates around them to withstand the pressure from clamping the cells. After glue injection, testing is performed. If a cell within a single battery cell is found to be defective, it needs to be removed and replaced. This is especially problematic for pouch batteries, where the glued battery casing is easily damaged during rework, causing adjacent, healthy cells to be scrapped. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a battery casing and battery cell with side plate openings. The purpose is to use a pair of end plates to clamp and fix multiple battery cells. The pair of side plates attached to both sides of the battery cell mainly serve a sealing function, do not bear pressure, and are detachable. Glue injection holes are opened on the side plates to allow for testing before glue injection. Glue is injected only after the test is passed, avoiding battery damage caused by disassembly and assembly.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a battery casing with side plate openings, comprising a top plate, a pair of end plates, and a pair of side plates for supporting multiple battery cells arranged side by side; the top plate is provided with a power connection terminal for connecting to the battery cells; characterized in that: the pair of end plates are clamped on the front and rear sides of the multiple battery cells; the pair of side plates are located on the left and right sides of the battery cells; at least one of the side plates is provided with at least one set of holes; the set of holes includes two single holes arranged vertically, one being an injection hole and the other being an observation hole; a buffer frame is attached to the inner side of the side plate; the set of holes is located within the buffer frame.

[0005] As a further optimization, the injection hole is located below the observation hole.

[0006] As a further optimization, the observation hole is located directly above the glue injection hole.

[0007] As a further optimization, the two side plates are provided with the group holes.

[0008] As a further optimization, the top plate is detachably connected to a pair of end plates by screws.

[0009] As a further optimization, both side plates are detachably connected to the end plate by screws.

[0010] As a further optimization, a buffer frame is attached to the inside of the side plate; the group hole is located inside the buffer frame.

[0011] This utility model also provides a battery cell, including a battery casing with side plate openings as described above; the top plate is provided with a power connection terminal connected to the battery cell; a plurality of battery cells are clamped between a pair of end plates, with their electrodes all facing upward and connected to the power connection terminal.

[0012] Compared with the prior art, the advantages of this utility model are: the glue injection hole is located on the side plate, away from conductive components, making the glue injection operation convenient and less prone to errors. Before glue injection, the battery cell is clamped and fixed by the end plate to facilitate testing before glue injection, avoiding battery damage caused by disassembly and assembly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the assembled structure of Embodiment 1 of this utility model;

[0014] Figure 2 This is a schematic diagram of the disassembled structure of Embodiment 1 of this utility model.

[0015] The correspondence between the technical features in the figure and the reference numerals is as follows: top plate 1; end plate 2; side plate 3; glue injection hole 31; observation hole 32; battery cell 4; buffer frame 5. Detailed Implementation

[0016] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some preferred embodiments of this utility model, and not all embodiments. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model, and are not intended to limit the protection scope of this utility model.

[0017] Example: Please refer to Figure 1-2This utility model provides the following technical solution: a battery casing with side plate openings, applied to a battery cell, wherein the casing encloses multiple side-by-side battery cells 4 to form the battery cell, wherein the casing includes a top plate 1, a bottom plate, a pair of end plates 2 and a pair of side plates 3 assembled to form a cuboid with an internal cavity for supporting a plurality of side-by-side battery cells 4; the top plate 1 is provided with a terminal for connection to the battery cells 4; the pair of end plates 2 are fixedly connected to the bottom plate and clamped on the front and rear sides of the plurality of battery cells 4; the pair of side plates 3 are located on the left and right sides of the battery cells 4 and are detachably connected to the end plates 2; at least one set of holes is provided on at least one side plate 3; the set of holes has two holes arranged vertically, the lower hole being a glue injection hole 31 and the upper hole being an observation hole 32. The terminal can be an opening exposing the electrode of the battery cell 4, or a metal electrode welded to the tab of the battery cell 4, so as to conduct electricity to the outside.

[0018] In use, several battery cells 4 are first placed between a pair of end plates 2, which have sufficient thickness to provide clamping force. Then, the top plate 1 is installed to clamp and fix the multiple battery cells 4. At this time, the battery cells can be tested regardless of whether the side plate 3 is installed. If the test is qualified, the side plate 3 is installed, and glue is injected through the lower glue injection hole 31. When glue overflows from the upper observation hole 32, it indicates that the glue is full. The observation hole 32 also serves as a vent to prevent air from accumulating inside the battery. Even if glue overflows, it will not interfere with conductive components because it is on the side and far from the top electrodes, and it is easy to wipe and clean. If the test is unqualified, glue injection is not performed first. At this time, the side plate 3 and the top plate 1 can be easily disassembled to replace the unqualified battery cells 4. Then, glue injection is performed after reassembly to avoid damage to the battery cells 4 and the casing caused by disassembly and reassembly.

[0019] Preferably, the observation hole 32 is located directly above the glue injection hole 31. The observation hole 32 should be lower than the height of the conductive component to avoid excessive glue injection.

[0020] To improve the efficiency of glue injection, the two side plates 3 are provided with the group holes.

[0021] Preferably, both side plates 3 are detachably connected to the end plates 2 by screws. The top plate 1 is detachably connected to the pair of end plates 2 by screws.

[0022] To ensure sufficient space for the adhesive, a buffer frame 5 is attached to the inner side of the side plate 3; the assembly hole is located within the buffer frame 5 to create a space for the adhesive between the side plate 3 and the battery cell 4. More preferably, the buffer frame 5 is rectangular and arranged close to the periphery of the side plate 3 to accommodate enough adhesive.

[0023] The advantage of this embodiment is that the glue injection hole 31 is located on the side plate 3, away from conductive components, making the glue injection operation convenient and less prone to errors. Before glue injection, the cell 4 has been clamped and fixed by the end plate 2, and the battery cell is basically formed, which can be tested. This allows for testing before glue injection, avoiding battery damage caused by disassembly and assembly.

[0024] Example 2, please refer to Figure 1-2 The difference between this embodiment and Embodiment 1 is that the housing may not include a bottom plate. The top plate is a PCB board and is not connected to the end plates, but only to the upper end of the battery cell 4. Its function is to connect the battery to transmit current and collect signals. A pair of end plates 2 and a pair of side plates 3 form a frame, which clamps multiple battery cells 4 in the middle of the frame without direct connection. The frame can be fixed at least by binding, or it can form a battery cell as described in Embodiment 1.

[0025] In use, the difference from Embodiment 1 is that if the test fails, glue is not applied immediately. Instead, the binding of the frame is released to facilitate the replacement of the defective battery cell 4. Then, the binding is reassembled and glue is applied, avoiding damage to the battery cell 4 and the casing caused by disassembly and assembly. Therefore, the disassembly and assembly in this embodiment are more convenient and efficient.

[0026] Example 3, please refer to Figure 1-2 The difference between this embodiment and Embodiment 1 is that, due to the restriction of the buffer frame 5, the adhesive can only flow within the buffer frame 5. Therefore, the battery can be placed upside down during adhesive injection, and adhesive injection can still be performed. The positions of the injection hole 31 and the observation hole 32 are opposite to those in Embodiment 1, but the same technical effect is still achieved.

[0027] The parts of this utility model not described in detail are prior art; for those skilled in the art, the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A battery casing with side openings, comprising a top plate (1), a pair of end plates (2) and a pair of side plates (3) for housing a plurality of battery cells (4) arranged side by side; the top plate (1) is provided with terminals for connection to the battery cells (4); characterized in that: A pair of end plates (2) are clamped on the front and rear sides of a plurality of battery cells (4); a pair of side plates (3) are attached to the left and right sides of the battery cells (4); at least one of the side plates (3) is provided with at least one set of holes; the set of holes includes two single holes arranged vertically, one being a glue injection hole (31) and the other being an observation hole (32); A buffer frame (5) is attached to the inside of the side plate (3); the group hole is located inside the buffer frame (5).

2. The battery casing with side panel openings according to claim 1, characterized in that: The injection hole (31) is located below the observation hole (32).

3. The battery casing with side panel openings according to claim 2, characterized in that: The observation hole (32) is located directly above the glue injection hole (31).

4. The battery casing with side panel openings according to claim 2, characterized in that: The two side plates (3) are provided with the group holes.

5. The battery casing with side panel openings according to claim 1, characterized in that: Both side plates (3) are detachably connected to the end plate (2) by screws.

6. The battery casing with side panel openings according to claim 1, characterized in that: The top plate (1) is detachably connected to a pair of end plates (2) by screws.

7. The battery casing with side panel openings according to claim 1, characterized in that: The buffer frame (5) is rectangular and is arranged close to the periphery of the side plate (3).

8. A single battery cell, characterized in that: The battery casing includes the side panel opening as described in any one of claims 1-7.

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