CN206848445U - A device for quickly testing the internal pressure of a finished hard-shell lithium-ion battery - Google Patents

Abstract

The utility model relates to a device of interior pressure of hard shell lithium ion battery of quick test finished product. The pressure sensor is fixed on a cover plate assembly of the battery through a connecting piece, the screw of the pressure sensor jacks up an explosion-proof valve, and the connecting piece is respectively sealed with the cover plate assembly and the pressure sensor. According to the above technical scheme, the utility model discloses a pressure sensor can detect the internal pressure of finished product hard shell lithium ion battery fast conveniently to realize the continuous automatic recording of data through automatic data collection station, can truly reflect the interior pressure change of battery.

Description

A device for quickly testing the internal pressure of a finished hard-shell lithium-ion battery

technical field

The utility model relates to a device for quickly testing the internal pressure of a finished hard shell lithium ion battery.

Background technique

Lithium-ion battery is a new type of high-energy battery successfully developed in the 20th century. It has the advantages of high working voltage, high specific energy, no pollution, no memory effect, and long life. It is widely used in modern digital products such as mobile phones and notebooks. Especially in the past ten years, lithium-ion batteries have developed rapidly in the field of electric vehicles such as passenger cars and buses.

Lithium-ion batteries are always accompanied by oxidation-reduction side reactions from the initial formation, capacity separation to later use, which will inevitably generate a certain amount of gas, causing the internal pressure of the battery to increase, causing the shell to bulge and deform. Increase the impedance between pole pieces. This side reaction will not only reduce the capacity and life of the battery, but also bring safety hazards. Therefore, the ability to quickly and conveniently detect the internal pressure of the finished hard-shell battery has important guiding significance for inferring the internal reaction of the battery.

Utility model content

The purpose of this utility model is to provide a device for quickly testing the internal pressure of a finished hard-shell lithium-ion battery. The device can measure the pressure of the hard-shell lithium-ion battery in real time, quickly and conveniently during normal use without changing the internal environment of the battery. The electrical performance in the battery and the internal pressure of the battery during the overcharge safety test.

In order to achieve the above purpose, the utility model adopts the following technical solutions: it includes a battery, a pressure sensor connected to the inside of the battery and an automatic data collector connected to the pressure sensor, and the pressure sensor is fixed on the cover plate assembly of the battery through a connecting piece , and the screw rod of the pressure sensor opens the explosion-proof valve, and the connecting piece is sealed with the cover plate assembly and the pressure sensor respectively.

The sealing between the connecting piece and the cover plate assembly is formed by laser welding, and the connecting piece is welded at the position of the explosion-proof valve.

The pressure sensor is threadedly connected with the cover plate assembly.

The connecting piece has a flat waist-shaped structure as a whole, and the center of the connecting piece is provided with a threaded hole for matching with the pressure sensor, and the circumferential direction of the connecting piece is provided with a flange structure for welding with the cover plate assembly.

It can be seen from the above technical solution that the pressure sensor of the present invention can quickly and conveniently detect the internal pressure of the finished hard-shell lithium-ion battery, and realize continuous and automatic data recording through the automatic data collector, which can truly reflect the internal pressure change of the battery.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a top view of the utility model connector;

Fig. 3 is a cross-sectional view along line A-A of Fig. 2 .

detailed description

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1, a device for quickly testing the internal pressure of a finished hard-shell lithium-ion battery includes a battery 1, a pressure sensor 2 connected to the battery 1, and an automatic data collector 3 connected to the pressure sensor 2, and the pressure sensor 2 The connecting piece 4 is fixed on the cover plate assembly 5 of the battery 1, and the screw rod of the pressure sensor 2 opens the explosion-proof valve, and the connecting piece 4 is sealed with the cover plate assembly 5 and the pressure sensor 2 respectively. The automatic data collector 3 can collect the pressure value in the whole process, and it is not limited to this during use, and manual recording can also be adopted.

Further, a seal is formed between the connecting piece 4 and the cover assembly 5 by laser welding, and the connecting piece 4 is welded at the position of the explosion-proof valve.

Further, the pressure sensor 2 is screwed to the cover assembly 5 .

Further, as shown in Fig. 2 and Fig. 3, the connecting piece 4 has a flat waist-shaped structure as a whole, and the center of the connecting piece 4 is provided with a threaded hole 41 for matching with the pressure sensor 2, and the circumferential direction of the connecting piece 4 is provided with The flanging structure 42 is convenient for welding with the cover plate assembly 5 .

The beneficial effects of the utility model are: 1) The utility model is easy to operate and can be directly used for the finished hard-shell lithium-ion battery; 2) The sealed design of the utility model can realize the normal use, electrical performance and overcharge safety of the lithium-ion battery During the test, it is completely isolated from the environment without changing the internal atmosphere of the battery, and truly reflects the change of the internal pressure of the battery; 3) The connector and the cover plate group are welded by laser, and the pressure sensor and the connector are connected by thread, which can be conveniently and quickly Realize the connection of the test device; 4) The automatic data collector can realize real-time and continuous automatic recording of data, which greatly reduces the workload; 5) The pressure sensor can realize the accurate measurement of the internal pressure of the battery during the battery test process. Research and development, improvement, quality monitoring in the battery production process and battery performance testing are all of great significance.

The above-mentioned embodiments are only described to the preferred implementation of the utility model, and are not limited to the scope of the utility model. Various modifications and improvements made should fall within the scope of protection determined by the claims of the utility model.

Claims (4)

1. A device for quickly testing the internal pressure of a finished hard-shell lithium-ion battery, characterized in that it includes a battery (1), a pressure sensor (2) connected to the battery (1), and an automatic pressure sensor (2) connected to the pressure sensor (2). In the data collector (3), the pressure sensor (2) is fixed on the cover assembly (5) of the battery (1) through the connector (4), and the screw of the pressure sensor (2) pushes the explosion-proof valve, so The above connecting piece (4) is sealed with the cover plate assembly (5) and the pressure sensor (2) respectively. 2. The device for quickly testing the internal pressure of a finished hard-shell lithium-ion battery according to claim 1, characterized in that: the seal between the connecting piece (4) and the cover plate assembly (5) is formed by laser welding, and The connecting piece (4) is welded at the position of the explosion-proof valve. 3. The device for quickly testing the internal pressure of a finished hard-shell lithium-ion battery according to claim 1, characterized in that: the pressure sensor (2) is screwed to the cover assembly (5). 4. The device for quickly testing the internal pressure of a finished hard-shell lithium-ion battery according to claim 1, characterized in that: the connecting piece (4) has a flat waist-shaped structure as a whole, and the center of the connecting piece (4) A threaded hole (41) is provided to match with the pressure sensor (2), and a flange structure (42) is provided on the circumference of the connecting piece (4) to facilitate welding with the cover plate assembly (5).