Ternary cell package structure

Abstract

The utility model discloses a ternary battery core package structure which comprises a shell, an upper bracket, a lower bracket, a high-temperature-resistant ceramic chip, a high-temperature-resistant insulating sheet and a copper bus bar, and is characterized in that the copper bus bar and the high-temperature-resistant insulating sheet are arranged at the top of the upper bracket and the bottom of the lower bracket; the upper support and the lower support are each provided with a plurality of counter bores designed in a penetrating mode so that the battery cells can be positioned and assembled. The positive electrode and the negative electrode of the battery cell are provided with nickel sheets so as to be electrically connected with the copper busbars at the upper end and the lower end; the high-temperature-resistant insulating sheets cover the copper bus bars, and the high-temperature-resistant insulating sheets are provided with I-shaped grooves corresponding to the mounting positions of the battery cells; the upper support is provided with a glue injection hole position and a connecting screw hole, an inner thread fixing guide column is formed in an inner cavity of the lower support, and the upper support and the lower support are mutually connected and fixed through matching of a bolt. According to the utility model, the practicability and the safety of the battery core package are improved through reasonable structural design.

Description

Technical Field

[0001] This utility model belongs to the field of battery cell pack technology, and in particular relates to a ternary battery cell pack structure. Background Technology

[0002] Secondary battery cells, such as lithium-ion cells, are commonly used as power cells in electric vehicles. They offer advantages such as high energy density, high average output voltage, and recyclability. These secondary battery cells typically have explosion-proof valve assemblies. When the cell experiences overvoltage or excessive temperature, the explosion-proof valve assembly opens to release high-temperature, high-pressure substances from inside the cell, thus preventing the cell from exploding due to excessive internal pressure or temperature.

[0003] The existing explosion-proof structure of battery packs still has room for improvement to further enhance their explosion-proof performance, thereby improving safety and practicality. Utility Model Content

[0004] This invention provides a ternary battery cell pack structure to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A ternary lithium battery cell package structure includes a shell, an upper bracket, a lower bracket, a high-temperature resistant ceramic sheet, a high-temperature resistant insulating sheet, and a busbar. The structure is characterized in that the top of the upper bracket and the bottom of the lower bracket are each equipped with a busbar and a high-temperature resistant insulating sheet, and both the upper and lower brackets have several through-holes for positioning and assembling the battery cells. The positive and negative terminals of each battery cell are equipped with nickel plates for electrical connection to the busbars at both ends. The high-temperature resistant insulating sheets cover the busbars, and each insulating sheet has an I-shaped groove aligned with the mounting position of each battery cell. The upper bracket has injection holes and connecting screw holes, while the lower bracket has internally threaded guide posts. The upper and lower brackets are connected and fixed to each other by bolts.

[0007] Preferably, the injection holes of the upper bracket are used for injecting thermally conductive adhesive, which fills the cavity formed by the upper and lower brackets, so that each cell makes thermal conduction contact based on the solidified thermally conductive adhesive.

[0008] Preferably, an airflow channel is pre-set between the housing and the upper and lower supports, and the housing has a window to allow the airflow channel to communicate with the outside atmosphere, and an explosion-proof valve is installed on the window.

[0009] Preferably, the high-temperature resistant ceramic sheet is laid on the top and bottom of the inner cavity of the shell.

[0010] Preferably, the housing is further provided with a BMS to connect with each battery cell for information monitoring, early warning and alarm.

[0011] Compared with existing technologies, the advantages of this utility model are:

[0012] 1. The battery cell support of this utility model is divided into upper and lower supports. The upper support has an injection hole, which can be used to inject thermally conductive adhesive after the upper and lower supports are combined. Both the upper and lower supports are formed with countersunk holes to position and assemble the battery cell. This structural design does not require additional jigs or fixtures for the injection operation and can stably assemble the battery cell. In addition, the injection operation can make each battery cell make thermal conduction contact based on the solidified thermally conductive adhesive. In the event of thermal runaway of one or more battery cells, heat can be dissipated quickly and the heat can be dissipated to battery cells further away. This can prevent the thermal runaway battery cell from affecting the temperature of several surrounding battery cells by absorbing heat as a whole.

[0013] 2. The positive electrode of each battery cell in this utility model uses a relatively soft nickel sheet. The nickel sheet is welded to the positive electrode of the battery cell to be electrically connected to the bus copper busbar. While meeting the working requirements, it can also be blown open when the battery cell burns and produces gas, ensuring that the high-temperature gas is released and buffered at a certain distance, and allowing it to be sprayed onto the high-temperature resistant ceramic sheet. When the nickel sheet is blown open, the high-temperature resistant insulating sheet with I-shaped grooves and the explosion-proof valve will also flip open and open at the same time based on the impact of the airflow, thus forming a reasonable and effective exhaust and pressure relief channel, reducing or even avoiding the possibility of explosion caused by high pressure and heat not being able to dissipate.

[0014] 3. The high-temperature resistant ceramic sheet prevents the top cover of the casing from burning through in the event of thermal runaway of the battery cell, which could lead to cascading thermal runaway of other components. This design improves practicality and safety.

[0015] 4. This utility model is equipped with a BMS to connect with each battery cell for information monitoring, early warning and alarm, so that users can monitor the usage status and receive early warnings in the first time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model.

[0017] Figure 2 This is an exploded view of the present invention.

[0018] Figure 3 This is a structural diagram of the upper and lower supports of this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the lower support of this utility model.

[0020] Figure 5 This is a schematic diagram of the upper support structure of this utility model.

[0021] Figure 6This is a schematic diagram of the assembly structure of the housing of this utility model, in which upper and lower supports are installed.

[0022] Figure 7 This is a partially enlarged schematic diagram of the battery cell of this utility model, which is equipped with nickel plates and a copper busbar. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 7 As shown, this utility model is a ternary battery cell pack structure, mainly composed of a shell (1), an upper bracket (2), a lower bracket (3), a high-temperature resistant ceramic sheet, a high-temperature resistant insulating sheet (5), and a busbar (6). The top of the upper bracket (2) and the bottom of the lower bracket (3) are both equipped with busbars (6) and high-temperature resistant insulating sheets (5). The upper bracket (2) and the lower bracket (3) are both provided with several through holes (7) for positioning and assembling the battery cell (8). The positive and negative terminals of the battery cell (8) are both equipped with... Nickel sheets (4) are electrically connected to the busbars (6) at the upper and lower ends; the high-temperature resistant insulating sheets (5) are all covered on the busbars (6), and the high-temperature resistant insulating sheets (5) are all provided with I-shaped grooves (50) at the installation positions of each battery cell (8); the upper bracket (2) is provided with glue injection holes (20) and connecting screw holes (21), while the inner cavity of the lower bracket (3) is formed with internal thread fixing guide posts (30), and the upper bracket (2) and the lower bracket (3) are connected and fixed to each other by bolts.

[0025] Regarding the injection hole (20) of the bracket (2), it is for injecting thermally conductive adhesive so that the thermally conductive adhesive fills the cavity formed by the upper bracket (2) and the lower bracket (3), so that each cell (8) makes thermal conduction contact based on the solidified thermally conductive adhesive. The purpose of this design is to enable rapid heat dissipation through the thermally conductive adhesive when one or more cells are thermally runaway, so as to dissipate heat to cells further away, and avoid the cell that is thermally runaway at a certain location from affecting the temperature of several cells around it by absorbing heat as a whole.

[0026] Regarding the housing (1), the top and bottom of the inner cavity of the housing (1) are covered with high-temperature ceramic sheets, which can prevent the top cover of the housing (1) from burning through when the battery cell thermally runs away, causing other components to experience thermal runaway. This design can improve practicality and safety. In addition, there is a pre-set airflow channel (10) between the housing (1) and the upper bracket (2) and the lower bracket (3). The housing (1) has a window (11) to allow the airflow channel (10) to be connected to the outside atmosphere. An explosion-proof valve is installed on the window (11). In conjunction with this design, the high-temperature resistant insulating sheet (5) is aligned with the installation position of each battery cell (8) and has an I-shaped groove (50). The purpose of this design is to ensure that when the battery cell (8) burns and generates gas, it can be pushed open, ensuring that the high-temperature gas is released and buffered at a certain distance, and that it can be sprayed onto the high-temperature resistant ceramic sheet. When the nickel sheet (4) is pushed open, the high-temperature resistant insulating sheet (5) with I-shaped grooves (50) and the explosion-proof valve will also open and flip open at the same time based on the impact of the airflow, thus forming a reasonable and effective exhaust and pressure relief channel, reducing or even avoiding the possibility of explosion caused by the inability of high pressure and heat to dissipate.

[0027] This utility model is also equipped with a BMS, which is connected to each battery cell for information monitoring, early warning and alarm, so that users can monitor the usage status and receive early warnings in the first time.

[0028] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

Claims

1. A ternary battery cell pack structure, comprising a shell (1), an upper support (2), a lower support (3), a high-temperature resistant ceramic sheet, a high-temperature resistant insulating sheet (5), and a busbar (6), characterized in that, The top of the upper bracket (2) and the bottom of the lower bracket (3) are equipped with busbars (6) and high-temperature insulating sheets (5). The upper bracket (2) and the lower bracket (3) are provided with several through-holes (7) for positioning and assembling the battery core (8). The positive and negative poles of the battery core (8) are provided with nickel plates (4) for electrical connection with the busbars (6) at the upper and lower ends. The high-temperature insulating sheets (5) cover the busbars (6) and are provided with I-shaped grooves (50) at the installation positions of each battery core (8). The upper bracket (2) is provided with glue injection holes (20) and connecting screw holes (21), while the inner cavity of the lower bracket (3) is formed with internal thread fixing guide posts (30). The upper bracket (2) and the lower bracket (3) are connected and fixed to each other by bolts.

2. The ternary battery cell pack structure according to claim 1, characterized in that, The injection hole (20) of the upper bracket (2) is used for injecting thermally conductive adhesive. The thermally conductive adhesive fills the cavity formed by the upper bracket (2) and the lower bracket (3), so that each cell (8) makes thermal conduction contact based on the solidified thermally conductive adhesive.

3. The ternary battery cell pack structure according to claim 1, characterized in that, An airflow channel (10) is pre-set between the housing (1) and the upper support (2) and the lower support (3). The housing (1) has a window (11) to allow the airflow channel (10) to communicate with the outside atmosphere, and an explosion-proof valve is installed on the window (11).

4. The ternary battery cell pack structure according to claim 1, characterized in that, The high-temperature resistant ceramic sheets are laid on the top and bottom of the inner cavity of the shell (1).

5. A ternary battery cell pack structure according to claim 1, characterized in that, The housing (1) is also equipped with a BMS to connect with each battery cell for information monitoring, early warning and alarm.

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