Battery module

Abstract

The utility model discloses a battery module which comprises a box body, a single battery cell is arranged in the box body, pressure release valves are arranged at two ends of the box body, an anti-explosion channel is arranged on one side of the top end of the single battery cell, two ends of the anti-explosion channel are connected with the pressure release valves, an anti-explosion valve is arranged at the bottom end of the anti-explosion channel, and the pressure release valves are connected with the anti-explosion valve. The anti-explosion valves are arranged on the single battery cells; by designing the anti-explosion channel, gas generated after the single cell anti-explosion valve is broken through can only flow in the anti-explosion channel, the two ends of the anti-explosion channel directly face the pressure relief valve, the pressure relief valve can be quickly broken through for pressure relief, explosion can be effectively prevented, the single cell is not prone to deformation due to pressure, and follow-up thermal runaway analysis is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion batteries, and in particular to a battery module. Background Technology

[0002] In electric vehicles, energy storage systems, and other electronic devices, batteries serve as the core energy storage unit and are typically used in large modules. Thermal runaway is one of the common problems with battery modules. Although various battery modules exist to address thermal runaway, some significant defects and shortcomings still remain.

[0003] When thermal runaway occurs in the existing module, the explosion-proof valve of the individual cell will be broken. When the pressure inside the box reaches a certain level, it will break the pressure relief valve of the module. However, during the process of the gas pressure rising inside the battery module, the individual cells inside the module will be subjected to greater pressure and are prone to deformation. At the same time, the module is prone to fire if the pressure relief valve is not broken, which may lead to an explosion. This is not conducive to subsequent analysis of cell thermal runaway and poses a safety hazard.

[0004] Therefore, we propose a battery module to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a battery module.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A battery module includes a housing, a single battery cell is disposed inside the housing, pressure relief valves are disposed at both ends of the housing, an explosion-proof channel is disposed on one side of the top of the single battery cell, the two ends of the explosion-proof channel are connected to the pressure relief valves, an explosion-proof valve is disposed at the bottom of the explosion-proof channel, and the explosion-proof valve is disposed on the single battery cell.

[0008] More preferably, the top of the box is provided with a cover plate, which is fixed to the box by welding.

[0009] More preferably, the top center of the individual battery cell is recessed, and an electrode post is provided at the recessed part of the top of the individual battery cell.

[0010] More preferably, the top of the pole post is provided with a collection plate, and the collection plates are fixedly connected to each other with a connecting rod.

[0011] More preferably, the top surface of the acquisition board is lower than the top surface of the individual battery cell.

[0012] More preferably, the top surface of the explosion-proof channel is flush with the top surface of the individual battery cell.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] By designing an explosion-proof channel, the gas generated after the explosion-proof valve of a single battery cell is ruptured can only flow within the explosion-proof channel. The two ends of the explosion-proof channel are directly opposite the pressure relief valve, which can quickly rupture the pressure relief valve to release pressure, effectively preventing explosion. The single battery cell is not easily deformed due to pressure, which is beneficial for subsequent thermal runaway analysis. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of a battery module proposed in this utility model;

[0016] Figure 2 This is a diagram of the internal structure of the enclosure;

[0017] Figure 3 This is an exploded view of the internal structure of the box.

[0018] In the diagram: 1. Housing; 2. Cover plate; 3. Pressure relief valve; 4. Individual battery cell; 5. Explosion-proof channel; 6. Data acquisition board; 7. Connecting rod; 8. Terminal post; 9. Explosion-proof valve. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-3 A battery module includes a housing 1, with a single battery cell 4 inside the housing 1. Pressure relief valves 3 are provided at both ends of the housing 1. When the module experiences thermal runaway and the internal pressure becomes too high, the pressure inside the module will break through the pressure relief valves 3, which can prevent the module from exploding due to excessive internal pressure.

[0021] An explosion-proof channel 5 is provided on one side of the top of the individual battery cell 4. The two ends of the explosion-proof channel 5 are connected to the pressure relief valve 3. An explosion-proof valve 9 is provided at the bottom of the explosion-proof channel 5. The explosion-proof valve 9 is located on the individual battery cell 4. By designing the explosion-proof channel 5, the gas generated after the explosion-proof valve 9 of the individual battery cell 4 is ruptured can only flow in the channel 5. The two ends of the explosion-proof channel 5 are directly opposite the pressure relief valve 3, which can quickly rupture the pressure relief valve 3 to release pressure and effectively prevent explosion. The individual battery cell 4 is not easily deformed due to pressure, which is beneficial for subsequent thermal runaway analysis.

[0022] The top of the box 1 is provided with a cover plate 2, which covers the top of the box 1 to seal the box 1 and prevent external dust and other impurities from entering the box 1 and causing an impact. The cover plate 2 is fixed to the box 1 by welding, which makes the welding fixation more firm and stable and can improve stability.

[0023] The top center of the single cell 4 is recessed, and the recessed part of the top of the single cell 4 is provided with a pole post 8. The pole post 8 is set in the groove, which can effectively reduce the space used, facilitate the connection and fixation with the acquisition board 6 or busbar, reduce the height of the module box 1, and facilitate the subsequent installation of the module.

[0024] A data acquisition plate 6 is provided at the top of the terminal post 8. The data acquisition plate 6 connects the terminals 8 of multiple individual cells 4 to realize the series and parallel connection of the cells. A connecting rod 7 is fixedly connected between the data acquisition plates 6. The connecting rod 7 can connect the data acquisition plates 6, thereby connecting multiple individual cells 4 together, which can effectively improve the stability of the individual cells 4 after connection in the housing 1.

[0025] The top surface of the acquisition board 6 is lower than the top surface of the individual battery cell 4, which can effectively reduce the space used, facilitate the connection and fixation between the acquisition board 6 and the individual battery cell 4, reduce the height of the module housing 1, and facilitate the subsequent installation of the module.

[0026] The top surface of the explosion-proof channel 5 is flush with the top surface of the individual battery cell 4, which can effectively reduce space usage and lower the height of the module housing 1, making it easier for the module to be installed later.

Claims

1. A battery module, comprising a housing, wherein a single battery cell is disposed inside the housing, and pressure relief valves are provided at both ends of the housing, characterized in that, An explosion-proof channel is provided on one side of the top of the individual battery cell. The two ends of the explosion-proof channel are connected to the pressure relief valve. An explosion-proof valve is provided at the bottom of the explosion-proof channel. The explosion-proof valve is located on the individual battery cell.

2. A battery module according to claim 1, characterized in that, The top of the box is provided with a cover plate, which is fixed to the box by welding.

3. A battery module according to claim 1, characterized in that, The top center of the individual battery cell is recessed, and an electrode post is provided at the recessed part of the top of the individual battery cell.

4. A battery module according to claim 3, characterized in that, The top of the pole is provided with a collection plate, and the collection plates are fixedly connected by a connecting rod.

5. A battery module according to claim 4, characterized in that, The top surface of the acquisition board is lower than the top surface of the individual battery cell.

6. A battery module according to claim 1, characterized in that, The top surface of the explosion-proof channel is flush with the top surface of the individual battery cell.

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