Pole group assembling pressure auxiliary measuring device

Abstract

The utility model discloses a pole group assembling pressure auxiliary measuring device, which comprises a bottom support and an upper cover, and is characterized in that the bottom support is provided with a placing groove with an opening in the top surface, and the placing groove is used for placing a pole group of which the wet assembling pressure is to be detected; one side of the bottom support is provided with a through hole which is communicated with the placing groove and is used for enabling the acid liquid extruded from the pole group to flow out in the measurement process; the middle of the outer bottom surface of the bottom support is provided with an assembling groove used for being matched with a lower detection platform of a universal testing machine during measurement. The upper cover is pressed on the top surface of the pole group during detection, and an upper detection platform of the universal testing machine is pressed on the top surface of the upper cover. When the wet pressure of the polar group is detected, the lower detection platform and the upper detection platform of the universal testing machine can be prevented from being in direct contact with the polar group by using the bottom support and the upper cover, so that the polar group is prevented from being polluted and corroded by acid liquor. Acid liquid extruded from a polar group in the detection process flows out through the through holes in the bottom support and then is collected, so that environmental pollution is fully avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead-acid battery detection, and in particular relates to an auxiliary measuring device for pole group assembly pressure. Background Art

[0002] The structure of a lead-acid battery includes a battery tank and a pole group arranged in the battery tank. The pole group includes alternately stacked positive plates and negative plates, and a separator for separating the positive plates from the negative plates. When the pole group is assembled in the battery tank, it is in a tightly assembled state. The assembly pressure of the pole group is the pressure that the pole group bears when it is assembled into the battery tank due to the compression of the battery tank in the width direction. The assembly pressure of the pole group is an important quality inspection indicator in the battery manufacturing process, which will have an important impact on the capacity and life of the battery.

[0003] In actual production, the dry assembly pressure of the electrode group is usually measured. The so-called dry assembly pressure refers to the pressure that the electrode group is subjected to when it is compressed to a corresponding thickness and assembled into a battery slot when it is not immersed in electrolyte. However, during actual use, the electrode group fully absorbs the electrolyte or is immersed in the electrolyte. At this time, the pressure that the electrode group is subjected to is called wet assembly pressure. Dry pressure testing cannot fully reflect the situation of the electrode group when it is immersed in electrolyte, so in battery research it is usually necessary to test the wet assembly pressure of the electrode group after absorbing the electrolyte.

[0004] For example, the utility model with the authorization announcement number CN202002755U discloses a battery wet state pole group assembly pressure tester, including a bracket, a liquid injection tank arranged at the bottom of the bracket, a test tank arranged above the liquid injection tank, and a positioning measuring caliper arranged above the test tank, and a pressure tester is arranged on the side of the test tank. However, the device is more troublesome to use, and the device itself is also more complicated to prepare.

[0005] At present, the measurement of the assembly pressure of the lead-acid battery pole group is generally carried out using a universal testing machine. After the pole group is compressed to a set thickness through the upper and lower working platforms of the universal testing machine, the universal testing machine can read the pressure value of the pole group at this time, which is the pole group assembly pressure.

[0006] However, the universal testing machine is a general-purpose equipment, and there is no special testing device for different types of batteries. Especially when testing the wet assembly pressure of the electrode group, the electrode group is soaked and absorbed by the electrolyte. At this time, when the electrode group is compressed, the electrolyte will be squeezed out. When the electrode group is directly placed on the working platform of the universal testing machine for testing, the electrolyte will flow down and pollute the instrument and the environment. Therefore, it is necessary to specially make a testing device that is convenient for measuring the assembly pressure of the electrode group and avoids pollution to the environment and harm to the human body. Utility Model Content

[0007] The present utility model addresses the above-mentioned deficiencies in the prior art and provides an auxiliary measuring device for the assembly pressure of a battery plate group, facilitating the detection of the wet assembly pressure of the battery plate group.

[0008] An auxiliary measuring device for the assembly pressure of a battery plate group, which is used in cooperation with a universal testing machine when in use. The universal testing machine has a detection platform, and the detection platform includes a lower detection platform and an upper detection platform, and the upper detection platform can move up and down. The auxiliary measuring device for the assembly pressure of the battery plate group includes:

[0009] A bottom tray, having a placement groove with an open top surface, and the placement groove is used for placing the battery plate group whose wet assembly pressure is to be detected; a through hole communicating with the placement groove is provided on one side of the bottom tray for the acid solution extruded from the battery plate group to flow out during the measurement process; an assembly groove for cooperating with the lower detection platform of the universal testing machine during the measurement is provided in the middle of the outer bottom surface of the bottom tray.

[0010] An upper cover, which is used to press on the top surface of the battery plate group during the detection, and the upper detection platform of the universal testing machine presses on the top surface of the upper cover.

[0011] Preferably, a guide acid hose is externally connected to the through hole. More preferably, the auxiliary measuring device for the assembly pressure of the battery plate group further includes a receiving container for receiving the acid solution flowing out from the guide acid hose.

[0012] Preferably, a guide acid groove is provided at the bottom edge of the placement groove, and the through hole communicates with the guide acid groove.

[0013] Preferably, the depth of the guide acid groove is 2-5 mm, and the width of the guide acid groove is 2-5 mm.

[0014] Preferably, the size of the upper cover matches the size of the placement groove of the bottom tray; during the detection, the top surface of the battery plate group is lower than the top surface of the placement groove, and the upper cover is placed in the placement groove. More preferably, a raised edge is provided on the top surface edge of the upper cover to form a protection groove, and the upper detection platform of the universal testing machine presses in the protection groove.

[0015] Preferably, the auxiliary measuring device for the assembly pressure of the battery plate group further includes a universal testing machine. The universal testing machine has a detection platform, and the detection platform includes a lower detection platform and an upper detection platform, and the upper detection platform can move up and down. When in use, the assembly groove on the outer bottom surface of the bottom tray is placed in cooperation with the lower detection platform of the universal testing machine, and the upper cover is driven to squeeze the battery plate group during the downward movement of the upper detection platform.

[0016] Preferably, the materials of both the bottom tray and the upper cover are acid-resistant hard plastic materials. The hard plastic material can be polypropylene.

[0017] When the wet-assembly pressure auxiliary measuring device for the battery plate group of the present utility model is in use, the battery plate group after fully absorbing or soaking in the electrolyte is placed in the placement groove of the bottom tray. The bottom tray is placed on the lower detection platform of the universal testing machine through the assembly groove on the bottom surface. Generally, at this time, the top surface of the battery plate group is lower than the top surface of the placement groove. Then, the upper cover is placed on the top surface of the battery plate group. During the detection, the upper detection platform of the universal testing machine presses down on the top surface of the upper cover. The degree of downward pressure of the upper detection platform is set in advance according to the assembly thickness of the battery plate group. When the upper detection platform presses down to the set position, the universal testing machine reads the pressure value at this time, which is the wet-assembly pressure of the battery plate group. The electrolyte (acid solution) squeezed out from the battery plate group flows out from the through holes on the bottom tray, and a container can be used outside the bottom tray to collect the electrolyte flowing out from the through holes.

[0018] When the present utility model detects the wet pressure of the battery plate group, by using the bottom tray and the upper cover, it can avoid the direct contact between the lower detection platform and the upper detection platform of the universal testing machine and the battery plate group, so as to avoid being contaminated and corroded by the acid solution. By allowing the acid solution squeezed out from the battery plate group during the detection process to flow out through the through holes on the bottom tray and then collecting it, environmental pollution is fully avoided. Description of the Drawings

[0019] Figure 1 It is a top view of the bottom tray of the present utility model.

[0020] Figure 2 It is a top view of the upper cover of the present utility model.

[0021] Figure 3 It is a cross-sectional view of the bottom tray and the upper cover of the present utility model.

[0022] Reference numerals: bottom tray 1, placement groove 11, acid guide groove 12, through hole 13, acid guide hose 14, assembly groove 15, upper cover 2, protection groove 21. Detailed Description of the Preferred Embodiments

[0023] As Figures 1 to 3 shown, a wet-assembly pressure auxiliary measuring device for a battery plate group is used in cooperation with a universal testing machine. The universal testing machine has a detection platform, and the detection platform includes a lower detection platform and an upper detection platform, and the upper detection platform can move up and down. The universal testing machine is commercially available, so its specific structure will not be described in detail in this application.

[0024] The wet-assembly pressure auxiliary measuring device for the battery plate group of the present application includes a bottom tray 1 and an upper cover 2.

[0025] The bottom tray 1 has a placement groove 11 with an open top surface, and the placement groove 11 is used to place the battery plate group whose wet-assembly pressure is to be detected. The placement groove 11 is in the shape of a cuboid as a whole, and its size is slightly larger than that of the battery plate group, so that the battery plate group can be easily taken and placed.

[0026] The inner bottom surface of the base 1, that is, the bottom surface of the placement groove 11, is an overall flat surface. A circle of acid guide grooves 12 is provided at the bottom edge of the bottom surface of the placement groove 11. The depth of the acid guide groove 12 is 2 to 5 mm, and the width of the acid guide groove 12 is 2 to 5 mm.

[0027] One side of the base 1 is provided with a through hole 13 that communicates with the placement groove 11 and is used for the acid liquid extruded from the electrode group during the measurement to flow out. The height of the through hole 13 is adapted to that of the acid guide groove 12, that is, the through hole 13 communicates with the acid guide groove 12, so that the acid liquid extruded from the electrode group converges into the acid guide groove 12 and then discharges outwards from the through hole 13. The through hole 13 is preferably provided at one of the corners of the base 1.

[0028] A acid guide hose 14 is externally connected to the through hole 13. At the same time, the electrode group assembly pressure auxiliary measuring device of the present application further includes a receiving container for receiving the acid liquid flowing out from the acid guide hose 14. The receiving container can use a conventional plastic beaker that can be used to hold sulfuric acid solution, or other bottles.

[0029] In the middle of the outer bottom surface of the base 1, there is an assembly groove 15 for cooperating with the lower detection platform of the universal testing machine during measurement. The cross-section of the lower detection platform of the universal testing machine is circular, so the cross-section of the assembly groove 15 shown in the figure is also circular. The size of the assembly groove 15 should exactly match that of the lower detection platform, and there can be some fitting tolerances, so that the base 1 will not displace too much back and forth on the lower detection platform during use.

[0030] The upper cover 2 is used to press on the top surface of the electrode group during detection, and the upper detection platform of the universal testing machine presses on the top surface of the upper cover 2. By squeezing the upper cover 2, the upper cover 2 then squeezes the electrode group, which can prevent the upper detection platform from directly contacting the electrode group and touching the acid liquid in the electrode group. The size of the upper cover 2 matches that of the placement groove 11 of the base 1. During detection, the top surface of the electrode group is lower than the top surface of the placement groove 11, and the upper cover is placed in the placement groove 11.

[0031] A circle of protrusions is provided at the top surface edge of the upper cover 2 to form a protection groove 21, and the upper detection platform of the universal testing machine presses inside the protection groove 21. The setting of the protection groove 21 can further prevent the acid liquid from overflowing to the top surface of the upper cover 2 after the electrode group is squeezed by the upper cover 2, thereby polluting the upper detection platform.

[0032] The materials of the base 1 and the upper cover 2 are both acid-resistant hard plastic materials. The hard plastic material can be polypropylene. Other acid-resistant hard plastic materials can also be used.

[0033] In a preferred embodiment, the assembly pressure auxiliary measuring device for the electrode group further includes a universal testing machine, the universal testing machine has a detection platform, the detection platform includes a lower detection platform and an upper detection platform, and the upper detection platform can move up and down. During use, the assembly groove 15 on the outer bottom surface of the bottom tray 1 is placed in cooperation with the lower detection platform of the universal testing machine, and the upper cover 2 is driven to squeeze the electrode group during the downward movement of the upper detection platform.

[0034] When the assembly pressure auxiliary measuring device for the electrode group of the present utility model is in use, the electrode group after fully absorbing the electrolyte or soaking in the electrolyte is placed in the placement groove 11 of the bottom tray 1. The bottom tray 1 is placed on the lower detection platform of the universal testing machine through the assembly groove 15 on the bottom surface. At this time, the top surface of the electrode group is lower than the top surface of the placement groove 11. Then, the upper cover 2 is placed on the top surface of the electrode group. During detection, the upper detection platform of the universal testing machine presses down on the top surface of the upper cover. The degree of downward pressure of the upper detection platform is set in advance according to the assembly thickness of the electrode group. When the upper detection platform presses down to the set position, the universal testing machine reads the pressure value at this time, which is the wet assembly pressure of the electrode group. The electrolyte (acid solution) squeezed out of the electrode group flows out through the through hole 13 on the bottom tray 1, and after passing through the acid guide hose 14, a receiving container is used to receive the flowing acid solution.

Claims

1. A pressure-assisted measuring device for assembling a battery cell group, which is used in cooperation with a universal testing machine. The universal testing machine has a testing platform, and the testing platform includes a lower testing platform and an upper testing platform. The upper testing platform can move up and down. It is characterized in that, The polar group assembly pressure auxiliary measuring device includes: A bottom tray, having a placement groove with an open top surface, and the placement groove is used to place the polar group for detecting the wet assembly pressure; one side of the bottom tray is provided with a through hole communicating with the placement groove for allowing the acid solution extruded from the polar group during measurement to flow out; the middle of the outer bottom surface of the bottom tray is provided with an assembly groove for cooperating with the lower detection platform of the universal testing machine during measurement. An upper cover, which is used to press on the top surface of the polar group during detection, and the upper detection platform of the universal testing machine presses on the top surface of the upper cover.

2. The pressure-assisted measuring device for the electrode group assembly according to claim 1, wherein A guide acid hose is externally connected to the through hole.

3. The pressure-assisted measuring device for a battery electrode group assembly according to claim 2, wherein, It further includes a receiving container for receiving the acid solution flowing out from the guide acid hose.

4. The pressure-assisted measurement device for the electrode group assembly according to claim 1, wherein, A circle of acid guiding grooves is provided at the bottom edge of the placement groove, and the through hole communicates with the acid guiding grooves.

5. The pressure-assisted measuring device for the electrode group assembly according to claim 4, characterized in that, The depth of the acid guiding groove is 2-5 mm, and the width of the acid guiding groove is 2-5 mm.

6. The pressure-assisted measurement device for the electrode group assembly according to claim 1, wherein, The size of the upper cover matches the size of the placement groove of the bottom tray. During detection, the top surface of the polar group is lower than the top surface of the placement groove, and the upper cover is placed in the placement groove.

7. The pressure-assisted measurement device for the electrode group assembly according to claim 6, wherein A circle of protrusions is provided at the top surface edge of the upper cover to form a protection groove, and the upper detection platform of the universal testing machine presses in the protection groove.

8. The pressure-assisted measurement device for the electrode group assembly according to claim 1, wherein It further includes a universal testing machine. The assembly groove on the outer bottom surface of the bottom tray is placed in cooperation with the lower detection platform of the universal testing machine, and the upper detection platform drives the upper cover to squeeze the polar group during the descending process.

9. The pressure-assisted measuring device for the electrode group assembly according to claim 1, characterized in that, The materials of the bottom tray and the upper cover are both acid-resistant hard plastic materials.

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