Battery liquid retention capability testing tool

Abstract

The utility model provides a battery liquid retention capability testing tool, which relates to the field of battery testing and comprises a testing tank capable of forming a sealed space, a hanging point used for hanging a battery is arranged in the testing tank, the hanging point can measure weight, and a sensor used for detecting air pressure is further arranged in the testing tank. The liquid collecting box is connected with the testing tank; according to the utility model, after the battery is stabbed and placed properly, the electrolyte in the battery flows out from the stabbed position by sucking air in the tank, so that the overall electrolyte absorption and retention capability of the battery is evaluated by combining the air pressure in the tank monitored by the sensor, the overall mass change of the battery measured by the hook, and the relation curve of the dwell time and the electrolyte loss of the battery established.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery test field especially relates to a battery liquid reserve capacity test frock. BACKGROUND

[0002] The overall liquid absorption and reserve capacity of the battery cell is a crucial parameter in battery development, and there are currently few related test methods, only the wettability test of the pole piece, but the test cannot represent the overall situation inside the battery. UTILITY MODEL CONTENTS

[0003] The utility model discloses a battery liquid reserve capacity test frock to solve the above technical problem.

[0004] The utility model discloses a battery liquid reserve capacity test frock to solve the above technical problem.

[0005] A battery liquid reserve capacity test frock, including the test jar that can form the sealed space, there is the hanging point for hanging the battery in the test jar, and the hanging point can measure weight, and there is also the sensor for detecting air pressure;

[0006] Still include the liquid collecting box that is connected with the test jar;

[0007] Puncture the battery, suck the air from the sealed space, the liquid collecting box collects the electrolyte that flows from the puncture, the sensor monitors the air pressure, the hanging point measures the overall mass change of the battery, establishes the relationship curve of the pressure maintaining time and the battery liquid loss amount, and evaluates the overall liquid absorption and reserve capacity of the battery.

[0008] Preferably, it further includes a bend pipe for introducing nitrogen into the sealed space after testing.

[0009] Preferably, the test jar includes a jar body and a jar cover, wherein the jar body has a jar bottom interface, the jar bottom interface is a fixing structure of the liquid collecting box, and the jar body further has a plurality of jar opening extension parts.

[0010] The jar cover extension part is arranged at the jar cover and corresponds to the plurality of jar opening extension parts.

[0011] The jar opening extension part and the jar cover extension part correspond and are locked, and a sealed space can be formed in the jar body.

[0012] Preferably, the structure for locking the jar opening extension part and the jar cover extension part is a screw and a nut, the screw is installed on the jar opening extension part and extends upward through the jar cover extension part, and the nut is screwed on the upward extending part of the screw to lock the jar opening extension part and the jar cover extension part.

[0013] Preferably, the jar body is provided with a first check valve connected with a pump group and a stop valve connected with the bend pipe.

[0014] Preferably, the can lid has a pressure block in the center, and the pressure block contains a sensor body for connecting the sensor.

[0015] Preferably, the hanging point is a hook, and the liquid collection box is equipped with a second one-way valve.

[0016] Preferably, the test tank is equipped with a support, which includes struts that are connected one-to-one with the extension of the tank opening, and the support also includes a counterweight, which is a fixing structure for all the struts.

[0017] Preferably, the test tank is supported by a bracket, and a space is provided at the bottom of the test tank for personnel to install or remove the collection box.

[0018] The beneficial effects of this utility model are:

[0019] 1. In this utility model, after the battery is punctured and properly placed, the electrolyte in the battery flows out from the punctured position by evacuating the air inside the can. In combination with the sensor monitoring the air pressure inside the can and the hook measuring the overall mass change of the battery, a relationship curve between the pressure holding time and the amount of electrolyte loss of the battery is established to evaluate the overall electrolyte absorption and retention capacity of the battery.

[0020] 2. In testing the overall liquid absorption and retention capacity of a battery, this invention can also easily solve the technical problem of difficulty in extracting electrolyte from the battery. Attached Figure Description

[0021] Figure 1 A schematic diagram of a battery liquid retention capacity testing fixture;

[0022] Figure 2 for Figure 1 The diagram shows the structure of the tooling after it has been mounted on the bracket.

[0023] Figure 3 for Figure 1 The front view of the tooling shown;

[0024] Figure 4 for Figure 3 The tooling shown is shown in a split diagram;

[0025] Figure 5 for Figure 3 A cross-sectional view of the tooling shown;

[0026] Figure 6 A schematic diagram of the battery liquid retention capacity testing fixture during battery testing;

[0027] 1, tank body; 2, tank bottom interface; 3, liquid collecting box; 4, tank cover; 5, pressing block; 6, sensor body; 7, tank opening extension; 8, tank cover extension; 9, screw; 10, nut; 11, first one-way valve; 12, stop valve; 13, limiting sleeve; 14, supporting rod; 15, counterweight; 16, second one-way valve; 17, hook; 18, sensor; 19, elbow. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0030] The specific embodiments of the present application will be described below with reference to the accompanying drawings.

[0031] Embodiment 1

[0032] In this embodiment, a battery liquid retention capacity test tool is proposed, please refer to Figures 1-6 The battery liquid retention capacity test tool comprises a test tank capable of forming a sealed space, and a support for supporting the test tank.

[0033] In this embodiment, the test tank comprises a cylindrical tank body 1 and a tank cover 4 adapted to the tank opening. Further, the bottom of the tank body 1 is a tank bottom interface 2, which has threads. The tank bottom interface 2 is used to fix the liquid collecting box 3 provided with the second one-way valve 16 in a threaded connection manner. Further, the tank opening of the tank body 1 has six horizontally outward extending tank opening extensions 7. Corresponding to the six tank opening extensions 7 are the tank cover extensions 8 provided at the tank cover 4. It should be noted that the tank opening extensions 7 and the tank cover extensions 8 can be locked by means of the screws 9 and the nuts 10 after corresponding, thereby forming a sealed space in the tank body 1.

[0034] Please refer to Figure 1 and Figure 2 In this embodiment, the structure for locking the tank opening extensions 7 and the tank cover extensions 8 is the screw 9 and the nut 10. The screw 9 is installed in the tank opening extension 7 and extends upward through the tank cover extension 8. The nut 10 is screwed onto the upward extending part of the screw 9, locking the tank opening extension 7 and the tank cover extension 8.

[0035] Please refer to Figure 2 In this embodiment, the support includes struts 14 connected one-to-one with the can mouth extensions 7, and further includes counterweights 15, which are fixed structures of all the struts 14. Further, the can body 1 is externally provided with a limiting sleeve 13, and the struts 14 pass through the limiting sleeve 13 to be connected with the can mouth extensions 7.

[0036] Please refer to Figure 5 and Figure 6 In this embodiment, the test can is provided with a hanging point for suspending the battery. Further, the central part of the can cover 4 is provided with a through screw groove, and the pressing block 5 embedded with the sensor body 6 is arranged in the can cover 4 in a threaded connection manner. The above-mentioned hanging point is a hook 17 in this embodiment, which is connected with the sensor body 6 and further has the function of detecting the mass. Further, the sensor body 6 is further provided with a sensor 18 for measuring the air pressure in the can.

[0037] Please continue to refer to Figure 5 and Figure 6 The can body 1 is provided with a first one-way valve 11 connected with a pump group. The combination structure of the first one-way valve 11 and the pump group can suck the air in the test can, so as to form a negative pressure in the test can. The can body 1 is further provided with a stop valve 12, one end of which is connected with a nitrogen cylinder, and the other end of which is connected with a bend pipe 19 arranged in the test can, wherein the air outlet of the bend pipe 19 points to the liquid collecting box 3.

[0038] Please refer to Figure 5 In this embodiment, the battery after being pricked needs to be hung at the hook 17 for testing. Specifically, after the battery is pricked and placed properly, the test can is sealed, the air in the can is sucked by the pump group, a negative pressure is formed in the can, the electrolyte in the battery flows out from the pricked position, during which the sensor 18 monitors the air pressure in the can, and the hook 17 measures the mass change of the whole battery, so as to establish the relationship curve between the pressure maintaining time and the liquid loss amount of the battery, and evaluate the overall liquid absorption and retention capacity of the battery. Of course, after the measurement is completed, nitrogen needs to be introduced into the test can through the bend pipe 19 to ensure that the flowed-out electrolyte is not affected by the external environment.

[0039] Embodiment 2

[0040] In this embodiment, a battery liquid retention capacity test tool is provided. Please refer to Figures 1-6 The battery liquid retention capacity test tool includes a test can capable of forming a sealed space, and a support for supporting the test can.

[0041] In the embodiment, the test tank comprises a cylindrical tank body 1 and a tank cover 4 matched with the tank opening. Further, the bottom of the tank body 1 is a tank bottom interface 2, which is threaded and used to fix a liquid collecting box 3 provided with a second one-way valve 16 in a threaded connection. Further, the tank opening of the tank body 1 has six horizontally outward extending tank opening extensions 7, and the tank cover 4 is provided with six tank cover extensions 8 corresponding to the six tank opening extensions 7. It should be noted that the tank opening extensions 7 and the tank cover extensions 8 are locked by means of a screw 9 and a nut 10, thereby forming a sealed space in the tank body 1.

[0042] Please refer to Figure 1 and Figure 2 In the embodiment, the structure for locking the tank opening extensions 7 and the tank cover extensions 8 is the screw 9 and the nut 10. The screw 9 is installed in the tank opening extension 7 and extends upward through the tank cover extension 8, and the nut 10 is screwed on the upward extending part of the screw 9 to lock the tank opening extension 7 and the tank cover extension 8.

[0043] Please refer to Figure 2 In the embodiment, the bracket comprises a support rod 14 connected to the tank opening extension 7 one by one, and the bracket further comprises a counterweight 15, which is a fixed structure of all support rods 14. Further, the tank body 1 is further provided with a limiting sleeve 13, and the support rod 14 passes through the limiting sleeve 13 and is connected to the tank opening extension 7.

[0044] Please refer to Figure 5 and Figure 6 In the embodiment, the test tank has a hanging point for suspending a battery. Further, the central part of the tank cover 4 has a through threaded slot, and the pressing block 5 embedded with a sensor body 6 is arranged in the tank cover 4 in a threaded connection. The above-mentioned hanging point is a hook 17 in the embodiment, which is connected to the sensor body 6. After the hook 17 is connected to the sensor body 6, it also has the function of detecting the mass. Further, the sensor body 6 is further provided with a sensor 18, which is used to measure the air pressure in the tank.

[0045] Please refer to Figure 5 and Figure 6 Figure 5 Figures 1-6 The tank body 1 is provided with a first one-way valve 11, which is connected to a pump group. The combination structure of the first one-way valve 11 and the pump group can suck the air in the test tank, thereby forming a negative pressure in the test tank. The tank body 1 is further provided with a stop valve 12, one end of which is connected to a nitrogen cylinder, and the other end of which is connected to a bend pipe 19 arranged in the test tank. The air outlet of the bend pipe 19 points to the liquid collecting box 3.

[0046] The conventional method for taking out the electrolyte in the battery is to directly insert a needle tube into the battery to extract the electrolyte by manual operation. It is very difficult to take out the electrolyte due to poor air tightness and too small negative pressure of the needle tube, and the electrolyte cannot be taken out completely. In addition, during the extraction of the electrolyte, the external environment cannot be strictly controlled, and the electrolyte is often accompanied by irrelevant factors such as easily oxidized external gas and moisture. Furthermore, the needle is a conductor, and when it is inserted into the battery shell, it is easy to pierce into the internal battery, causing short circuit and even piercing the battery to the hand, which has great safety hazards. Therefore, the battery liquid preservation capacity test tool proposed in the embodiment can be used to take out the electrolyte in addition to the test work of the embodiment 1. Specifically, in the embodiment, the pricked battery needs to be hung on the hook 17, the air in the tank is pumped to form negative pressure in the tank, and the electrolyte in the battery flows out from the pricked position, and the collected electrolyte is collected by the liquid collecting box 3.

[0047] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combination of the technical features does not exist, it should be considered as the scope of the description.

[0048] The above embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, some modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A battery liquid retention capacity test tool, characterized by: The application relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank. The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank. The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank.

2. The battery liquid retention capacity test tool of claim 1, wherein: The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank.

3. The battery liquid retention capacity test tool of claim 1, wherein: The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank. The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank. The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank.

4. The battery liquid retention capacity test tool of claim 3, wherein: The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank.

5. The battery liquid retention capacity test tool of claim 3, wherein: The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank.

6. The battery liquid retention capacity test tool of claim 3, wherein: The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank.

7. The battery liquid retention capacity test tool of claim 6, wherein: The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank.

8. The battery liquid retention capacity test tool of claim 3, wherein: The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank.

9. The battery liquid retention capacity test tool of claim 3, wherein: The application also relates to a battery testing device, which comprises a testing tank capable of forming a sealed space, a hanging point for suspending a battery in the testing tank, a sensor for detecting air pressure, and a liquid collecting box connected with the testing tank.

10. The battery liquid retention capacity test tool of claim 9, wherein: ​

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