Integrated detection device for volume and composition of gas produced by battery

Abstract

The utility model discloses a battery produced gas volume and component integrated detection device which comprises a produced gas volume detection device, a produced gas component detection device and a water bath heating device, the water bath heating device is used for containing at least two batteries at the same time and providing the same water bath temperature for the batteries, the produced gas volume detection device is matched with the water bath heating device and used for detecting the produced gas volume of the batteries, and the produced gas component detection device and the water bath heating device are arranged adjacently; and the produced gas component detection device is provided with a gas inlet pipe connected with a battery. According to the utility model, the gas production volume and the gas production component can be simultaneously tested in parallel, the chemical characteristic change of the battery in different stages can be accurately grasped, the failure progressive mechanism of the battery can be analyzed, and the device has important significance on the improvement of the battery material.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery detection technical field, especially point to battery gas volume and component integrated detection device. BACKGROUND

[0002] Lithium ion battery is mainly composed of positive pole, negative pole, electrolyte and isolation film, and in the process of charge and discharge, electrochemistry or chemical reaction will occur between positive pole material and electrolyte, thereby generating gas, the existence of gas can influence battery performance, and make battery swell and deform, when gas pressure reaches certain degree, it will cause battery shell to break, and cause safety accident, therefore, only comprehensive, accurate grasp of battery gas production and component can optimize battery material system and electrolyte, and design safe battery structure.

[0003] At present, when carrying out battery gas production test, only the volume of gas production or the component of gas production can be tested in the test process, the volume of gas production and the component of gas production cannot be tested simultaneously, and there is limitation.

[0004] In view of the above problems, it is necessary to study a battery gas volume and component integrated detection device, which can test the volume of gas production and the component of gas production simultaneously. UTILITY MODEL CONTENT

[0005] The utility model discloses a battery gas volume and component integrated detection device, which can test the volume of gas production and the component of gas production simultaneously.

[0006] In order to achieve the above purpose, the solution of the utility model is:

[0007] A battery gas volume and component integrated detection device, comprising a gas volume detection device, a gas component detection device and a water bath heating device, the water bath heating device is used for accommodating at least two batteries simultaneously and providing the same water bath temperature for each battery, the gas volume detection device is matched with the water bath heating device and is used for detecting the gas volume of the battery, the gas component detection device is arranged adjacent to the water bath heating device, and the gas component detection device has a gas inlet pipe connected with the battery.

[0008] The gas volume detection device has a containing chamber, and the water bath heating device is matched in the containing chamber.

[0009] The gas volume detection device has a detection jig connected with the battery.

[0010] The detection jig has a high-precision weighing sensor for detecting the buoyancy of the battery in the water bath heating device.

[0011] The water bath heating device comprises a double-layer water bath kettle, and an inner cavity of the double-layer water bath kettle is used for simultaneously accommodating at least two batteries and a heating solution used for heating the batteries and providing buoyancy for the batteries.

[0012] The heating solution is silicon oil.

[0013] The gas production component detection device adopts an in-situ differential electrochemical mass spectrometer.

[0014] After the above scheme, the battery gas production volume and component integrated detection device uses two batteries to be placed in the water bath heating device, and the water bath heating device provides the same water bath temperature for the two batteries, so that the two batteries are in the same test environment; then, the same charging and discharging operation is performed on the two batteries, and the gas production volume of one battery is detected in real time through the gas production volume detection device, and the gas production component of the other battery is detected in real time through the gas production component detection device.

[0015] As known from the foregoing, the water bath heating device can provide the same test environment for the two batteries, and the same charging and discharging operation is performed on the two batteries, so that the two batteries have the same gas production process; thus, the gas production volume and component integrated detection device can realize parallel and simultaneous testing of the gas production volume and component through real-time detection of the gas production volume and component of the two batteries respectively, which is helpful to accurately grasp the chemical characteristic change of the battery at different stages, and further helps to analyze the failure progression mechanism of the battery, and has important significance for improvement of the battery material. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure of the utility model is shown Figure One .

[0017] Figure 2 The structure of the utility model is shown Figure Two .

[0018] Figure 3 The local structure of the utility model is shown Figure One .

[0019] Figure 4 The local structure of the utility model is shown Figure Two .

[0020] Label explanation:

[0021] The gas production volume detection device 1, the accommodating chamber 11, the detection jig 12, the connecting wire 13,

[0022] The gas production component detection device 2, the gas inlet pipe 21,

[0023] a water bath heating device 3, a double-layer water bath pot 31,

[0024] a battery 4. DETAILED DESCRIPTION

[0025] In order to further explain the technical scheme of the utility model, the utility model will be described in detail below through specific embodiments.

[0026] As Figures 1 to 4 shown, the utility model discloses a kind of battery gas production volume and component integrated detection device, it includes gas production volume detection device 1, gas production component detection device 2 and water bath heating device 3;Wherein, water bath heating device 3 is used to simultaneously accommodate at least two batteries 4 and provide same water bath temperature to each battery 4, gas production volume detection device 1 is matched with water bath heating device 3 and is used to detect the gas production volume of battery 4, gas production component detection device 2 is adjacently arranged with water bath heating device 3, and gas production component detection device 2 has the gas inlet pipe 21 for connecting battery 4.

[0027] The battery gas production volume and component integrated detection device of the utility model uses, first two batteries 4 are placed in water bath heating device 3, and water bath heating device 3 provides same water bath temperature to the two batteries 4, so that the two batteries 4 are in same test environment;Then, the same charge-discharge operation is carried out to the two batteries 4, simultaneously, the gas production volume of one battery 4 is detected in real time by gas production volume detection device 1, and the gas production component of another battery 4 is detected in real time by gas production component detection device 2.

[0028] From the foregoing, the utility model can provide same test environment to two batteries 4 by water bath heating device 3, and the same charge-discharge operation is carried out to the two batteries 4, so that the two batteries 4 have same gas production process;So that the utility model can realize parallel simultaneous test of gas production volume and gas production component by gas production volume detection device 1 and gas production component detection device 2 simultaneously detecting the gas production volume and gas production component of the two batteries 4 respectively, which helps to accurately grasp the chemical characteristic change of battery 4 at different stages, and further helps to analyze the failure progression mechanism of battery 4, which has important significance for the improvement of battery 4 material.

[0029] In the embodiment of the utility model, the gas production volume detection device 1 has a containing chamber 11, and the water bath heating device 3 is matched in the containing chamber 11. The gas production volume detection device 1 has a detection jig 12 for connecting the battery 4 to detect the gas production volume of the battery 4; the battery 4 can float in the water bath heating device 3, the detection jig 12 has a high-precision weighing sensor for detecting the buoyancy of the battery 4 in the water bath heating device 3, the high-precision weighing sensor corresponds to the buoyancy of the battery 4 for detecting the gas production volume, the gas production volume detection device 1 detects the buoyancy change of the battery 4 in real time, and then calculates the volume change amount (i.e. the gas production volume of the battery 4) of the battery 4 according to the buoyancy change. The calculation formula of the volume change amount of the battery 4 is: Delta V = Delta F / (rho * g); wherein, Delta V is the volume change amount of the battery 4, Delta F is the buoyancy change amount of the battery 4, rho is the density of the liquid (i.e. the heating solution described below) provided by the water bath heating device 3 for the battery 4, and g is the gravitational constant.

[0030] In the embodiment of the utility model, the detection jig 12 also has a connecting wire 13 for connecting the positive and negative poles of the battery 4, and the charging and discharging of the battery 4 is controlled through the connecting wire 13.

[0031] In the embodiment of the utility model, the gas production component detection device 2 adopts an in-situ differential electrochemical mass spectrometer, which can realize in-situ analysis, qualitative and quantitative analysis and real-time monitoring, and has the characteristics of high sensitivity and high resolution.

[0032] In the embodiment of the utility model, the water bath heating device 3 includes a double-layer water bath pot 31, and the inner cavity of the double-layer water bath pot 31 is used to simultaneously accommodate at least two batteries 4 and a heating solution (not shown) for heating the batteries 4 and providing buoyancy for the batteries 4; the interlayer of the double-layer water bath pot 31 can be filled with hot water to heat the heating solution, so that the heating solution performs water bath heating on the batteries 4. The heating solution can be silicone oil, which has electrical insulation, weak volatility, a high boiling point greater than 200°C, is non-toxic and suitable for heating the batteries 4.

[0033] The above embodiment and drawing are not limited to the product shape and style of the utility model, and any ordinary technical personnel in the technical field can make appropriate changes or modifications, which should be considered as not departing from the patent category of the utility model.

Claims

1. A device for integrated detection of battery gas production volume and composition, characterized in that: The device comprises a gas production volume detection device, a gas production component detection device, and a water bath heating device. The water bath heating device is used for simultaneously accommodating at least two batteries and providing the same water bath temperature for each battery, the gas production volume detection device is matched with the water bath heating device and is used for detecting the gas production volume of the battery, the gas production component detection device is arranged adjacent to the water bath heating device, and the gas production component detection device has an air inlet pipe for connecting the battery.

2. The battery gas production volume and composition integrated detection device according to claim 1, characterized in that: The gas production volume detection device has a containing chamber, and the water bath heating device is matched in the containing chamber.

3. The battery gas production volume and composition integrated detection device according to claim 1 or 2, characterized in that: The gas production volume detection device has a detection jig for connecting the battery.

4. The battery gas production volume and composition integrated detection device according to claim 3, characterized in that: The detection jig has a high-precision weighing sensor for detecting the buoyancy of the battery in the water bath heating device.

5. The battery gas production volume and composition integrated detection device according to claim 3, characterized in that: The detection jig has connecting wires for connecting the positive and negative electrodes of the battery.

6. The battery gas production volume and composition integrated detection device according to claim 1, characterized in that: The water bath heating device comprises a double-layer water bath pot, and an inner cavity of the double-layer water bath pot is used for simultaneously accommodating at least two batteries and accommodating a heating solution for heating the batteries and providing buoyancy for the batteries.

7. The battery gas production volume and composition integrated detection device according to claim 6, characterized in that: The heating solution is silicon oil.

8. The battery gas production volume and composition integrated detection device according to claim 1, characterized in that: The gas production component detection device adopts an in-situ differential electrochemical mass spectrometer.

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