Battery top cover and battery gas production testing device

Abstract

The utility model provides a battery top cover which comprises a top cover main body, a lower sealing cover and an upper sealing cover, the top cover main body is clamped between the upper sealing cover and the lower sealing cover, a guide pipe communicated with the inside of a battery is fixedly arranged on the lower sealing cover, and the guide pipe penetrates through the top cover main body and the upper sealing cover and extends to the outside of the battery. And sealing pieces are arranged between the upper sealing cover and the top cover main body and between the lower sealing cover and the top cover main body. According to the utility model, the structure of the battery top cover is improved, and gas production detection can be carried out without puncturing the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery detection technical field, concretely relates to a battery top cover and battery gas production testing arrangement. BACKGROUND

[0002] In order to guarantee the safe use of battery, need to carry out gas production testing to battery in research and development production stage, including the component analysis to the gas produced in the operation of battery, the quantitative analysis to battery gas production, the pressure test to battery gas production.

[0003] The gas produced to battery needs to be detected to be in-depth to the inside of battery, and the common operation mode is to use the needle to puncture battery, to make the detection device and the inside of battery communicate, usually through the explosion-proof valve or liquid injection hole on the top cover of battery to make the needle into battery. But this kind of mode needs to control the puncture depth, avoids the damage to the structure of battery cell caused by needle, leads to the abnormal function of battery cell, influences the test result, and after puncturing, the top cover needs to be sealed again, avoids the gas leakage to influence the measurement accuracy UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of battery top cover and battery gas production testing arrangement, to improve the structure of battery top cover, without puncturing battery, can carry out gas production detection.

[0005] The utility model provides a kind of battery top cover, including top cover main body, lower cover and upper cover, the top cover main body is clamped between the upper cover and the lower cover, the lower cover is fixedly provided with the catheter that is communicated with the inside of battery, the catheter extends to the outside of battery by penetrating the top cover main body and the upper cover, and the upper cover and the top cover main body between, the lower cover and the top cover main body between are provided with sealing element.

[0006] The utility model more preferably technical scheme: installation hole is set up on the top cover main body, the catheter is set in the installation hole;The lower cover covers the installation hole setting, the upper cover covers the installation hole setting.

[0007] The utility model more preferably technical scheme: lower installation slot is set up on the lower cover, upper installation slot is set up on the upper cover, two sealing elements are respectively set in the upper installation slot, the lower installation slot.

[0008] The utility model more preferably technical scheme: the sealing element is sealing ring, the sealing element surrounds the installation hole setting.

[0009] The utility model more preferably technical scheme: the outer surface of the catheter is provided with screw thread, locking nut is set on the upper cover, the locking nut is connected with the catheter screw thread.

[0010] The utility model provides a battery gas production testing arrangement, through battery top cover and battery inside intercommunication, test the battery gas production, including the intercommunication gas duct's gas guide passageway, set up on the gas guide passageway's pressure detector, first valve and collector, the first valve opening and closing change control the intercommunication state between the gas duct and the collector.

[0011] The utility model more preferably technical scheme: close to the gas duct is provided with the branch intercommunication with the gas guide passageway, the pressure detector is set up on the branch, and the branch end is provided with second valve.

[0012] The utility model more preferably technical scheme: the gas guide passageway is provided with vacuum pump, and the vacuum pump is set up between the first valve and the collector.

[0013] The utility model more preferably technical scheme: still include the gas testing appearance for detecting gas component, the gas testing appearance is connected the collector, to obtain gas from the collector.

[0014] The battery top cover and the battery gas production testing arrangement have the following beneficial effects: the upper cover and the lower cover are respectively clamped on the upper and lower ends of the battery top cover, the conduit on the lower cover is connected with the inside of the battery, the screw thread on the conduit is connected with the locking nut, the battery top cover is fixed between the upper cover and the lower cover by screwing the locking nut, the connection airtightness is ensured by the sealing element, the testing arrangement is connected with the conduit to connect the inside of the battery, the inside of the battery is connected without puncturing the battery, the operation is simple and safe. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application. In the drawings, like reference numerals are used to represent similar elements. The accompanying drawings illustrate some embodiments of the present application and not all possible embodiments. Other embodiments can become apparent to those of ordinary skill in the art upon reading the following description.

[0016] Fig. 1 It is a sectional view of the battery top cover of the utility model.

[0017] Fig. 2 It is a sectional view of another embodiment of the battery top cover of the utility model.

[0018] Fig. 3 It is a schematic view of the battery gas production testing arrangement of the utility model.

[0019] In the figure: 10, battery; 11, top cover main body; 111, mounting hole; 21, lower cover; 211, lower mounting groove; 22, upper cover; 221, upper mounting groove; 23, conduit; 24, sealing element; 25, locking nut; 30, gas passage; 301, branch; 31, pressure detector; 311, second valve; 32, first valve; 33, collector; 331, air inlet valve; 332, air outlet valve; 34, gas tester; 35, vacuum pump. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other at will.

[0021] Please refer to Figs. 1 to 3 A battery top cover comprises an upper cover 22, a lower cover 21, and a top cover main body 11 clamped between the upper cover 22 and the lower cover 21. The lower cover 21 is located at the bottom of the cover main body. The lower cover 21 is provided with a conduit 23. The conduit 23 communicates with the inside of the battery 10. The conduit 23 extends to the outside of the battery 10 through the top cover main body 11 and the upper cover 22. A testing device is connected to the conduit 23 to obtain the gas inside the battery 10 through the conduit 23. The upper cover 22 and the lower cover 21 are both provided with a sealing element 24 to ensure the air tightness of the connection and ensure that the gas inside the battery 10 only enters the testing device through the conduit 23.

[0022] The top cover body 11 is provided with a mounting hole 111, and the catheter 23 is inserted into the mounting hole 111 to communicate the inside and outside of the battery 10. The lower cover 21 covers the mounting hole 111 and is attached to the bottom surface of the top cover body 11, and the upper cover 22 covers the mounting hole 111 and is attached to the top surface of the top cover body 11. The lower cover 21 is provided with a lower mounting groove 211 on one side end surface facing the top cover body 11, and the upper cover 22 is provided with an upper mounting groove 221 on one side end surface facing the top cover body 11. Two sealing members 24 are arranged in the upper mounting groove 221 and the lower mounting groove 211, respectively. The catheter 23 extends through the top cover body 11 and the upper cover 22 to the outside of the battery 10. The upper cover 22 and the lower cover 21 are connected, and the top cover body 11 is clamped between the upper cover 22 and the lower cover 21. The upper cover 22 and the lower cover 21 press the sealing members 24 at the upper and lower ends of the top cover body 11, respectively, to prevent gas from leaking from the connecting surfaces between the upper cover 22 and the top cover body 11 and between the lower cover 21 and the top cover body 11, affecting the accuracy of gas testing.

[0023] In the embodiment, the upper cover 22 and the lower cover 21 are both non-metal plates, specifically plastic plates, to avoid the upper cover 22 or the lower cover 21 mistakenly connecting the positive and negative electrodes, causing the battery 10 to short circuit. The end surface of the upper cover 22 facing one side of the top cover body 11 and the end surface of the lower cover 21 facing one side of the top cover body 11 are both flat surfaces, to facilitate the upper cover 22 and the lower cover 21 clamping the top cover body 11 and effectively pressing the sealing members 24 to form a seal. Preferably, the sealing member 24 is a sealing ring, which is arranged around the outer periphery of the mounting hole 111 to ensure the airtightness of the connection between the upper cover 22, the lower cover 21, and the top cover body 11.

[0024] The catheter 23 is vertically arranged in the middle of the lower cover 21, and the catheter 23 extends through the lower cover 21 to communicate the inside of the battery 10. The lower cover 21 is integrally formed with the catheter 23, so that the lower cover 21 can be fixed by fixing the catheter 23, and the upper cover 22 and the lower cover 21 cooperate to clamp the top cover body 11. In the embodiment, the catheter 23 is a circular tube, and the outer circular surface of the catheter 23 is provided with external threads. The upper cover 22 is provided with a locking nut 25, and the catheter 23 is threadedly connected with the locking nut 25. By rotating the locking nut 25 to change the distance between the locking nut 25 and the lower cover 21, the locking nut 25 drives the upper cover 22 to move downward, so that the upper cover 22 moves closer to the lower cover 21. The upper cover 22 and the lower cover 21 cooperate to clamp the top cover body 11, and the sealing members 24 are used to achieve sealing. The catheter 23 communicates the inside and outside of the battery 10.

[0025] As another embodiment, as shown in Fig. 2 The upper cover 22 is provided with a threaded hole, the catheter 23 extends to the outside of the battery 10 through the mounting hole 111, and is threadedly connected with the upper cover 22. By rotating the upper cover 22, the upper cover 22 and the lower cover 21 clamp the top cover body 11, and cooperate with the sealing members 24 to achieve sealing.

[0026] It should be noted that the battery top cover of the present application is used for test battery in product development process, and the structure of the test battery is the same as that of the mass production battery. In the embodiment, the mounting hole 111 formed on the top cover body 11 is the same as the hole for mounting the explosion-proof valve on the mass production battery, that is, the existing battery 10 top cover structure does not need to be redesigned and remodeled, and the battery 10 top cover suitable for gas production test in the present application can be obtained based on the existing battery 10 top cover structure, which greatly saves the production cost and production efficiency; at the same time, the battery 10 top cover of the present application does not need to puncture the battery 10, and the test device and the conduit 23 are connected to communicate the inside of the battery 10, which improves the operation safety.

[0027] Please refer to Fig. 3 A battery 10 gas production test device, comprising a gas guide passage 30, a pressure detector 31 and a collector 33, the gas guide passage 30 is connected with the conduit 23 to communicate the inside of the battery 10, the pressure detector 31 and the collector 33 are both arranged on the gas guide passage 30 to detect the pressure inside the battery 10 and collect the gas generated during the operation of the battery 10 respectively. The gas guide passage 30 is sealingly connected with the conduit 23 to avoid gas leakage from the interface between them.

[0028] A first valve 32 is arranged between the pressure detector 31 and the collector 33, and the first valve 32 is closed when detecting the pressure inside the battery 10. The pressure detector 31 and the first valve 32 are both arranged close to the conduit 23 to reduce the communication space between the first valve 32 and the battery 10, thereby reducing the influence of this part of space on the detection data of the pressure inside the battery 10.

[0029] The collector 33 is used to collect the gas generated during the operation of the battery 10, and the gas collected by the collector 33 is the gas production of the battery 10. In the embodiment, the collector 33 is a gas bag, which is provided with an inlet valve 331 and an outlet valve 332, the inlet valve 331 is connected with the gas guide passage 30, and the inlet valve 331 is opened and closed to control the gas into the gas bag; the outlet valve 332 is connected with a gas tester 34 to control the communication between the gas bag and the gas tester 34, and the gas tester 34 obtains the gas from the gas bag to analyze the composition of the gas.

[0030] Preferably, a branch 301 is arranged close to the conduit 23, the branch 301 is in communication with the gas guide passage 30, the pressure detector 31 is arranged on the branch 301, and a second valve 311 is arranged at the end of the branch 301. When the pressure detector 31 detects that the pressure is too large, the second valve 311 is opened to release pressure, so as to ensure the operation safety.

[0031] Preferably, after the battery 10 gas production testing device connects the conduit 23, the first valve 32 is closed, the inlet valve 331 is opened, and the outlet valve 332 is opened, and the interior of the gas conducting passage 30 is vacuumized through the outlet valve 332, and then the outlet valve 332 is closed, and the gas conducting passage 30 is kept in a vacuum state. When collecting the gas, the first valve 32 and the inlet valve 331 are opened, and the pressure difference between the gas conducting passage 30 and the interior of the battery 10 causes the gas to enter the collector 33, and the gas produced in the working process of the battery 10 is collected.

[0032] Alternatively, a vacuum pump 35 is arranged on the gas conducting passage 30, and the vacuum pump 35 is arranged between the first valve 32 and the collector 33, and is used to collect the gas in the collector 33.

[0033] Specifically, the second valve 311 and the first valve 32 are both closed, and the pressure detector 31 detects the pressure in the interior of the battery 10. Then the second valve 311 is closed, the first valve 32 is opened, the inlet valve 331 is opened, the outlet valve 332 is closed, the collector 33 is connected to the interior of the battery 10 through the gas conducting passage 30, and is used to collect the gas produced by the battery 10, and the gas production of the battery 10 is detected. After the gas production of the battery 10 is obtained, the outlet valve 332 is opened, the gas tester 34 obtains the gas from the collector 33, and the composition of the gas produced by the battery 10 is analyzed. During the whole detection process, if the pressure value detected by the pressure detector 31 is too large (here, the pressure value can be the pressure in the interior of the battery 10, or the pressure in the whole testing device during the gas collecting process), the second valve 311 is opened, and the device is depressurized, so as to ensure the safety of the detection.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery top cover characterized by, The battery top cover comprises a top cover body (11), a lower cover (21) and an upper cover (22), the top cover body (11) is clamped between the upper cover (22) and the lower cover (21), the lower cover (21) is fixedly provided with a conduit (23) in communication with the inside of the battery (10), the conduit (23) extends to the outside of the battery through the top cover body (11) and the upper cover (22), and sealing members (24) are arranged between the upper cover (22) and the top cover body (11) and between the lower cover (21) and the top cover body (11).

2. The battery top cover of claim 1, wherein, An installation hole (111) is formed in the top cover body (11), and the conduit (23) is arranged in the installation hole (111); the lower cover (21) covers the installation hole (111), and the upper cover (22) covers the installation hole (111).

3. A battery top cover according to claim 2, wherein A lower installation groove (211) is formed in the lower cover (21), and an upper installation groove (221) is formed in the upper cover (22), and the two sealing members (24) are arranged in the upper installation groove (221) and the lower installation groove (211) respectively.

4. The battery cover of claim 3, wherein the cover includes a plurality of openings formed therein. The sealing member (24) is a sealing ring, and the sealing member (24) surrounds the installation hole (111).

5. The battery cover of claim 1, wherein the cover is made of a material selected from the group consisting of: aluminum, steel, and a combination thereof. The outer surface of the conduit (23) is provided with threads, the upper cover (22) is provided with a locking nut (25), and the locking nut (25) is threadedly connected with the conduit (23).

6. A battery gas generation testing device characterized by, The battery top cover in any one of claims 1-5 is in communication with the inside of the battery (10), and a test for gas generated by the battery (10) is carried out, comprising a gas guide passage (30) in communication with the conduit (23), a pressure detector (31), a first valve (32) and a collector (33) arranged on the gas guide passage (30), and the first valve (32) is opened and closed to change the communication state between the conduit (23) and the collector (33).

7. A battery gas production test apparatus according to claim 6, wherein A branch (301) in communication with the gas guide passage (30) is arranged close to the conduit (23), the pressure detector (31) is arranged on the branch (301), and a second valve (311) is arranged at the end of the branch (301).

8. The battery gas production test apparatus of claim 6, wherein A vacuum pump (35) is arranged on the gas guide passage (30), and the vacuum pump (35) is arranged between the first valve (32) and the collector (33).

9. The battery gas production test apparatus of claim 6, wherein A gas tester (34) for detecting the composition of the gas is further included, and the gas tester (34) is connected with the collector (33) to obtain the gas from the collector (33).

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