A bidirectional pressure relief battery module

Abstract

The utility model belongs to the battery module technical field, concretely relates to a two -way pressure relief's battery module, include: at least one electric core module, the electric core module includes the electric core monomer of opposite setting, and the pressure relief mouth on opposite setting electric core monomer mutually diverge from each other. The utility model discloses through the electric core monomer is to the setting, to make its pressure relief mouth mutually diverge from each other, thereby when single electric core failure, the high -temperature high -pressure gas that discharges does not directly impact other electric core, effectively isolates the fault, prevents the spread of thermal runaway, secondly, because the positive pole and the negative pole of electric core module are divided and set module two sides, increase the inter -electrode distance, reduce the short -circuit risk, and improve the security.

Description

Technical Field

[0001] This utility model belongs to the field of battery module technology, specifically relating to a bidirectional pressure relief battery module. Background Technology

[0002] In existing battery packs, battery cells are typically arranged in a parallel configuration, with all cell vents facing the same direction. Examples include a low-voltage power supply (CN222261294U), an internal wireless beam module (CN221508277U), and a hybrid cell ventilation structure (CN222546433U). This layout presents significant safety hazards: when a cell fails due to overcharging, overheating, or an internal short circuit, the released high-temperature, high-pressure gas can directly impact adjacent cells, potentially triggering a chain reaction that causes multiple cells to fail simultaneously, increasing safety risks.

[0003] Therefore, this invention provides a bidirectional pressure relief battery module to solve the above problems. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a bidirectional pressure relief battery module, comprising: at least one cell module, wherein the cell module comprises opposingly arranged individual cells, and the pressure relief ports on the opposingly arranged individual cells are opposite to each other.

[0005] Preferably, the battery cell module is further provided with positive and negative electrodes that are opposite to each other.

[0006] Preferably, the battery cell module is fixed by a mounting bracket or a housing.

[0007] Preferably, the fixing frame or the housing is provided with a pressure relief outlet opposite to the pressure relief port.

[0008] Preferably, the battery cell module further includes connecting pieces for electrically connecting individual battery cells.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. This utility model arranges individual battery cells in opposite directions so that their pressure relief ports are opposite to each other. This ensures that when a single battery cell fails, the released high-temperature and high-pressure gas will not directly impact other battery cells, effectively isolating the fault and preventing the spread of thermal runaway.

[0011] 2. The positive and negative electrodes of the battery cell module of this utility model are placed on both sides of the module, which increases the distance between the electrodes, reduces the risk of short circuit, and improves safety. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural diagram of the present invention from another perspective;

[0015] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the exploded structure from another perspective of this utility model.

[0017] In the diagram: 1. Battery cell module; 11. Battery cell; 111. Electrode tab; 2. Connecting piece; 21. First connecting piece; 22. Second connecting piece; 3. Pressure relief port; 4. Positive electrode; 5. Negative electrode. Detailed Implementation

[0018] 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.

[0019] Example 1:

[0020] This utility model relates to a bidirectional pressure relief battery module, such as... Figures 1-4 As shown, it includes at least one battery cell module 1.

[0021] Each cell module 1 includes two square cell units 11 arranged in pairs and connected in series or parallel with each other through a connecting piece 2. Each cell unit 11 is provided with a pressure relief port 3, which is used to release the high-pressure gas and electrolyte inside the cell unit 11 when it malfunctions, such as overcharging, short circuit, thermal runaway or other abnormal conditions. At the same time, the cell unit 11 is also provided with two positive and negative electrode tabs 111 located on the same side as the pressure relief port 3, so as to connect the circuit.

[0022] In use, the battery cell module 1 can be fixed with a suitable mounting bracket or housing, such as the housing structure mentioned in the patent with publication number CN222261294U, or the mounting bracket composed of an upper plastic sill plate, a lower plastic sill plate, and two side plates mentioned in the patent with publication number CN222546433U. After the battery cell module 1 is fixed, the pressure relief ports 3 of the two battery cells 11 placed opposite each other are separated from each other and face different positions on both sides of the housing or mounting bracket. This way, when any battery cell 11 fails, the high-pressure gas and electrolyte ejected from its pressure relief port 3 will not affect the other battery cell 11 opposite to it, thereby reducing the risk of simultaneous battery cell failure and improving overall safety.

[0023] Furthermore, since the positive and negative tabs 111 of the individual battery cell 11 are located on the same side as the pressure relief port 3, when the pressure relief port 3 is facing away from each other, the positive and negative tabs 111 of the opposing battery cells 11 are also facing away from each other. Simultaneously, when the battery cells 11 are electrically connected to form a battery cell module 1, the positive terminal 4 and negative terminal 5 of the module are formed on both sides of the battery cell module 1 and electrically connected using a longer second connecting piece 22. This results in a larger distance between the positive terminal 4 and the negative terminal 5, providing a good safety distance and effectively avoiding the risk of short circuits caused by close proximity of the positive and negative terminals. When multiple battery cell modules 1 are electrically connected, adjacent battery cell modules 1 on the same side are connected using a shorter first connecting piece 21.

[0024] Example 2:

[0025] Based on the above embodiment 1, in order to facilitate the effective pressure relief of the pressure relief port 3 of the battery cell 11, a pressure relief outlet opposite to the pressure relief port 3 is opened on the housing or mounting bracket that is fixed to it, so that the pressure relief port 3 can spray out high-pressure gas and electrolyte.

[0026] Specifically, the pressure relief outlet can be a through hole opened on the side of the housing or mounting bracket, and the size of the through hole should at least expose the pressure relief port 3. This design, on the one hand, can form natural air convection between the through holes opened on both sides of the housing or mounting bracket to assist the entire module in heat dissipation; on the other hand, it can facilitate pressure relief through the pressure relief port 3. At the same time, when pressure is relieved through one through hole, the opposite through hole can be driven by the ejector effect to drive air to flow in quickly and enhance heat dissipation, so as to effectively prevent heat spread.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bidirectional pressure relief battery module, characterized in that, include: At least one battery cell module (1), the battery cell module (1) includes battery cell units (11) arranged opposite to each other, and the pressure relief ports (3) on the battery cell units (11) arranged opposite to each other are away from each other.

2. The bidirectional pressure relief battery module according to claim 1, characterized in that: The battery cell module (1) is also provided with a positive electrode (4) and a negative electrode (5) that are opposite to each other.

3. The bidirectional pressure relief battery module according to claim 1, characterized in that: The battery cell module (1) is fixed by a mounting bracket or a housing.

4. The bidirectional pressure relief battery module according to claim 1, characterized in that: The battery cell module (1) also includes a connecting piece (2) for electrically connecting the individual battery cells (11).

5. The bidirectional pressure relief battery module according to claim 3, characterized in that: The mounting bracket or the housing is provided with a pressure relief outlet opposite to the pressure relief port (3).

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