Battery detection device

Abstract

The utility model provides a battery detection device, and relates to the technical field of battery processing, the battery detection device comprises a rack, a detection mechanism and a liquid injection mechanism, the detection mechanism and the liquid injection mechanism are arranged on the rack, the detection mechanism comprises a positioning assembly and a first sensor, the positioning assembly is used for making contact with two opposite surfaces of a battery to position the battery, and the first sensor is configured to make contact with the two opposite surfaces of the battery; when the positioning assembly is in contact with the battery, the thickness of the battery is measured; the liquid injection mechanism comprises a liquid injection piece which is used for being connected with a liquid injection opening of the battery to charge the battery with electrolyte, and therefore liquid supplementing and thickness measuring operation of the battery can be achieved at the same station without carrying the battery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery processing, in particular to a battery detection device. BACKGROUND

[0002] When a battery is detected during processing, it needs to go through multiple processes such as liquid injection, charging, standing, and power supplementing. These processes are interleaved, so the battery needs to be transported back and forth to different positions for corresponding operations. This not only has low efficiency, but also easily damages the battery during transportation, reducing the quality of the battery. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a battery detection device to solve the problem that the battery needs to be transported back and forth between different positions during detection, which easily damages the battery during transportation.

[0004] The present application provides a battery detection device, comprising a rack, a detection mechanism and a liquid injection mechanism arranged on the rack, wherein:

[0005] The detection mechanism comprises a positioning assembly and a first sensor. The positioning assembly is used to contact two surfaces opposite to the battery to limit the position of the battery. The first sensor is configured to measure the thickness of the battery when the positioning assembly contacts the battery.

[0006] The liquid injection mechanism comprises a liquid injection member. The liquid injection member is used to connect with the liquid injection port of the battery to fill the battery with electrolyte.

[0007] In some possible embodiments of the present application, the liquid injection mechanism further comprises:

[0008] A quantitative assembly is used to connect a liquid supply device that supplies the electrolyte;

[0009] At least one liquid storage assembly is connected to the quantitative assembly and the liquid injection member. The liquid storage assembly is also used to connect the liquid injection member and a vacuum extraction device.

[0010] The quantitative assembly is configured to send the electrolyte into the liquid storage assembly according to a preset liquid volume when the liquid injection member fills the battery with the electrolyte.

[0011] In some possible embodiments of the present application, the quantitative assembly comprises:

[0012] A container has a containing cavity. The containing cavity is used to connect the liquid supply device.

[0013] At least one first liquid reservoir is located at least partially in the containing cavity. The top of the first liquid reservoir has a liquid inlet in the containing cavity. The bottom of the liquid reservoir is connected to the liquid storage assembly.

[0014] an adjusting member for adjusting the amount of liquid entering the first reservoir.

[0015] In some possible embodiments of the present application, the liquid injection mechanism further comprises a metering pump, which is configured to be connected to the liquid supply device and the accommodating cavity.

[0016] The container is provided with a liquid discharge pipe in communication with the accommodating cavity, and a liquid discharge valve is arranged on the liquid discharge pipe. The liquid discharge valve is configured to switch from a closed state to an open state when the amount of liquid in the first reservoir reaches a preset value, so that the liquid in the accommodating cavity flows out of the liquid discharge pipe.

[0017] In some possible embodiments of the present application, the adjusting member further comprises at least one second adjusting member corresponding to the first reservoir. The second adjusting member extends at least partially from the top of the accommodating cavity into the accommodating cavity. The second adjusting member is configured to adjust the volume of the first reservoir for accommodating the electrolyte by adjusting the length of the second adjusting member extending into the first reservoir.

[0018] In some possible embodiments of the present application, the adjusting member comprises a first adjusting member extending at least partially from the top of the accommodating cavity into the accommodating cavity. The first adjusting member is configured to change the volume of the accommodating cavity for accommodating the electrolyte by adjusting the length of the first adjusting member extending into the accommodating cavity.

[0019] In some possible embodiments of the present application, the first adjusting member and the second adjusting member each comprise an adjusting component and a first driving member. The first driving member is configured to drive the adjusting component to move, so as to change the length of the adjusting component extending into the accommodating cavity or the first reservoir.

[0020] In some possible embodiments of the present application, the liquid storage assembly comprises at least one second reservoir. The top of the second reservoir is connected to the bottom of the first reservoir in a one-to-one correspondence and is located below the first reservoir. A first control valve is arranged between the first reservoir and the second reservoir. The second reservoir is further configured to be connected to the vacuumizing device, and a second control valve is arranged between the second reservoir and the vacuumizing device.

[0021] In some possible embodiments of the present application, there are at least two second reservoirs. All the second reservoirs are connected to a flow converging member and connected to the vacuumizing device through the flow converging member. The second control valve is located between the flow converging member and the vacuumizing device.

[0022] In some possible embodiments of the present application, the positioning assembly comprises at least one limiting plate arranged on the rack, and at least one side of the limiting plate is provided with a floating plate, and a containing space for placing the battery is formed between the floating plate and the limiting plate, and the floating plate is configured to push the battery to move so that the battery is clamped between the floating plate and the limiting plate.

[0023] In some possible embodiments of the present application, the detection mechanism further comprises a driving assembly arranged on the rack, and the driving assembly is connected with the floating plate in one-to-one correspondence, and the driving assembly is configured to drive the floating plate to move so as to adjust the size of the containing space.

[0024] In some possible embodiments of the present application, the driving assembly comprises:

[0025] a transmission member connected with the floating plate;

[0026] a second driving member arranged on the rack and in transmission connection with the transmission member, and the second driving member is configured to drive the transmission member to push the floating plate to move.

[0027] In some possible embodiments of the present application, the driving assembly further comprises:

[0028] a first connecting member in transmission connection with the transmission member;

[0029] a second connecting member located between the first connecting member and the floating plate, and a limiting clamping groove is arranged on one side adjacent to the first connecting member of the second connecting member, and a clamping block is arranged on the first connecting member and inserted into the limiting clamping groove;

[0030] at least one elastic member connected with the floating plate and the second connecting member respectively;

[0031] a second sensor located between the clamping block and the second connecting member, and the second sensor is configured to detect the extrusion force of the clamping block on the first connecting member when the first connecting member is driven to move by the second driving member, so as to determine whether the floating plate and the limiting plate are in contact with the surface of the battery.

[0032] In some possible embodiments of the present application, the detection mechanism further comprises at least one mounting block for placing the battery, and the mounting block is located at the bottom of the containing space, the width of the mounting block is less than the thickness of the battery, and the mounting block is connected with the floating plate to drive the battery to move under the driving of the floating plate.

[0033] In some possible embodiments of the present application, the detection mechanism further comprises at least one test component corresponding to the floating plate, and the test component is configured to detect the performance of the corresponding battery.

[0034] In some possible embodiments of the present application, the test component comprises a first mounting member and a second mounting member arranged at two ends of the mounting block, and the first mounting member and the second mounting member are connected to the floating plate, and the first mounting member and / or the second mounting member is provided with a detection member configured to detect the performance of the battery, and the liquid injection member is arranged on the first mounting member or the second mounting member.

[0035] In some possible embodiments of the present application, the first mounting member and / or the second mounting member is provided with a third driving member configured to drive the detection member and the liquid injection member to move so as to contact the detection member and the liquid injection member with the battery.

[0036] The battery detection device provided by the present application comprises a detection mechanism and a liquid injection mechanism. The detection mechanism comprises a positioning component and a first sensor. The positioning component is configured to position the battery, and the first sensor is configured to measure the thickness of the battery. The liquid injection mechanism is configured to connect the liquid injection member with the liquid injection port of the battery to inject electrolyte into the battery, so that the battery can be filled with liquid and the thickness can be measured without moving the battery, thereby reducing the number of moving times during the battery detection process and reducing the probability of damage to the battery caused by moving. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0038] Figure 1 A structural schematic diagram of the battery detection device provided by the present application is shown in the accompanying drawings.

[0039] Figure 2 A structural schematic diagram of the liquid injection mechanism of the battery detection device provided by the present application is shown in the accompanying drawings.

[0040] Figure 3 A side view of the quantitative component of the battery detection device provided by the present application is shown in the accompanying drawings.

[0041] Figure 4 An internal structural schematic diagram of the quantitative component of the battery detection device provided by the present application is shown in the accompanying drawings.

[0042] Figure 5 A structural schematic diagram of the liquid storage component of the battery detection device provided by the present application is shown in the accompanying drawings.

[0043] Figure 6A front view of a detection mechanism of a battery detection device provided by an embodiment of the present application;

[0044] Figure 7 A top view of a detection mechanism of a battery detection device provided by an embodiment of the present application;

[0045] Figure 8 A side view of a detection mechanism of a battery detection device provided by an embodiment of the present application;

[0046] Figure 9 A perspective view of a detection mechanism of a battery detection device provided by an embodiment of the present application;

[0047] Figure 10 A process capability chart of a cup 1 in an experimental example of a battery detection device provided by an embodiment of the present application;

[0048] Figure 11 A process capability chart of a cup 2 in an experimental example of a battery detection device provided by an embodiment of the present application.

[0049] Explanation of reference numerals:

[0050] 100 - rack, 200 - liquid injection mechanism, 210 - liquid injection support, 220 - quantitative assembly, 221 - container, 2211 - containing cavity, 222 - first liquid reservoir, 223 - adjusting piece, 2331 - adjusting part, 2232 - first driving piece, 230 - liquid discharge pipe, 240 - liquid discharge valve, 250 - liquid storage assembly, 251 - second liquid reservoir, 252 - flange, 253 - flow converging piece, 254 - second control valve, 255 - first control valve, 256 - negative pressure sensor, 257 - tee, 258 - third control valve, 260 - liquid injection piece, 300 - detection mechanism, 310 - positioning assembly, 311 - floating plate, 312 - limiting plate, 313 - containing space, 320 - driving assembly, 321 - second driving piece, 322 - transmission piece, 323 - second connecting piece, 3231 - limiting clamping groove, 324 - first connecting piece, 3241 - clamping block, 325 - second sensor, 326 - elastic piece, 330 - testing assembly, 331 - first mounting piece, 332 - second mounting piece, 333 - detection piece, 340 - first sensor, 350 - mounting block, 360 - connecting plate, 370 - sliding block.

[0051] The specific embodiments of the present application have been shown and described in the above-described drawings, and will be described in more detail hereinafter. The drawings and the written description are not intended to restrict the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by reference to a particular embodiment. DETAILED DESCRIPTION

[0052] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description of the exemplary embodiments is intended to apply to any exemplary embodiment, unless specified otherwise. It is noted that the following descriptions assume exemplary embodiments in which the battery is a lithium-ion battery. However, the exemplary embodiments are not limited to lithium-ion batteries, and can be applied to other types of batteries.

[0053] Glossary:

[0054] Pre-charge: small current charging, the first start process of chemical reaction, activation of active material.

[0055] Formation: the first charging of the battery after the injection of the electrolyte under the condition of maintaining the open negative pressure and restraint, to achieve the activation of the battery. Thus, a solid electrolyte interphase (SEI) film is formed on the surface of the negative electrode material. The SEI film is a passivation layer with the characteristics of ion conduction but electronic insulation, which can effectively prevent the corrosion and damage of the electrolyte to the electrode material, and increase the cycle life of the battery.

[0056] Full charge: after the secondary injection of the battery, the SOC (State of Charge) of the battery is increased to 100% through a certain charging system, and the positive electrode is fully activated to improve the capacity of the battery.

[0057] Supplemental power: the battery is fully charged to prepare for the capacity of the battery.

[0058] Capacity grading: the capacity of the battery is evaluated and divided. After the battery is fully charged, it is discharged or discharged to a certain voltage & SOC. The capacity grading technology of emptying the electric quantity is called full grading, and the discharge to a certain voltage & SOC is called fixed grading. The capacity of the fixed grading needs to be fitted according to a specific formula, while the capacity of the full grading is the most real battery capacity.

[0059] OCV (Open circuit voltage): refers to the potential difference between the two stages when the battery is not discharged and opened.

[0060] DCIR (Direct Current Internal Resistance): refers to the internal resistance of the battery under direct current conditions. It is a method of calculating the impedance of the battery by discharging a large current and calculating the voltage drop.

[0061] ACIR (Alternating Current Internal Resistance): AC impedance of the battery is calculated by injecting an AC current signal of a specific frequency (0.1 Hz-1000 Hz freely adjustable) into the positive and negative electrodes of the battery.

[0062] In the production process of the existing battery, the battery needs to be transported back and forth to different process machines for multiple processes such as liquid injection, charging, standing, and power supplementing. These processes are interleaved, which consumes a large amount of cost and time, is low in efficiency, and in the process of transportation, there are risks such as bruising, foreign matter, and low capacity, which reduces the quality of the battery.

[0063] The present application integrates different detection processes such as liquid injection, restraint, and thickness measurement on the same operation platform, so that the battery can be detected without frequent transportation of the battery.

[0064] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0065] In some embodiments of the present application, as shown in Figure 1 The battery detection device includes a rack 100, a detection mechanism 300, and a liquid injection mechanism 200.

[0066] The detection mechanism 300 and the liquid injection mechanism 200 are both arranged on the rack 100, as shown in Figure 6 and Figure 7 The detection mechanism 300 includes a positioning assembly 310 and a first sensor 340. The positioning assembly 310 is used to contact two surfaces opposite to the battery to limit the position of the battery. The first sensor 340 can measure the thickness of the battery when the positioning assembly 310 contacts the battery. The liquid injection mechanism 200 is used to connect with a liquid supply device for supplying electrolyte. An air control valve can be arranged between the liquid injection mechanism 200 and the liquid supply device to control whether to supply liquid into the liquid injection mechanism 200. The liquid injection mechanism 200 includes a liquid injection piece 260, which is used to connect with the liquid injection port of the battery to fill the battery with electrolyte.

[0067] The positioning assembly 310 can fix one or more batteries through structural design. Correspondingly, the number of the first sensors 340 is adapted to the number of the batteries that can be fixed by the positioning assembly 310, that is, each first sensor 340 is used to detect the thickness of one battery. The liquid injection member 260 can be used to inject electrolyte into one battery or can be used to inject electrolyte into different batteries in sequence. However, in order to save time, one liquid injection member 260 is generally arranged for each battery.

[0068] It can be understood that the number of the positioning assembly 310, the first sensors 340 and the liquid injection member 260 can be adjusted according to the number of the batteries that need to be detected, which is not limited in the embodiment.

[0069] In addition, the liquid injection member 260 can be a common liquid injection device such as a liquid injection needle, as long as it can be adapted to the liquid injection port of the battery and can send electrolyte into the liquid injection port.

[0070] When the battery is placed on the rack 100, the liquid injection member 260 can be connected to the liquid injection port of the battery, and the liquid injection mechanism 200 is connected to the liquid supply device. The electrolyte stored in the liquid supply device can be sent into the battery through the liquid injection member 260 to inject electrolyte into the battery. When the thickness of the battery needs to be measured, the battery can be restrained by the positioning assembly 310 to prevent the battery from being inclined or displaced. Then the thickness of the battery is measured by the first sensor 340. Therefore, the injection of electrolyte and the measurement of the thickness of the battery can be realized at one station, which effectively reduces the number of times of carrying the battery and reduces the probability of damage to the battery due to carrying.

[0071] In some embodiments of the present application, referring to FIG. 2, Figure 2 As shown in FIG. 2, the liquid injection mechanism 200 further comprises a metering assembly 220 and at least one liquid storage assembly 250, and the liquid storage assembly 250 corresponds to the liquid injection member 260 one by one.

[0072] The metering assembly 220 is used to connect the liquid supply device. The liquid storage assembly 250 is connected to the metering assembly 220 and the liquid injection member 260. The liquid storage assembly 250 is also used to connect the liquid injection member 260 and the vacuum pumping device. When the liquid injection member 260 is used to inject electrolyte into the battery, the metering assembly 220 sends the electrolyte into the liquid storage assembly 250 according to the preset amount of liquid, so as to realize the quantitative injection of electrolyte into the battery.

[0073] Specifically, the path for connecting the metering assembly 220 and the vacuum pumping device of each liquid storage assembly 250 is independent. When the liquid injection member 260 is connected to the liquid injection port of the battery, if the battery needs to be pumped, the liquid injection path is closed, the battery is pumped by the vacuum pumping device and the liquid storage assembly 250. If the battery needs to be injected, the vacuum path is closed, the electrolyte in the metering assembly 220 is transferred into the liquid storage assembly 250, and then the electrolyte is injected into the battery through the liquid injection member 260.

[0074] In addition, the liquid storage assembly 250 can also be used to temporarily store the electrolyte, so that the dosing assembly 220 can timely store the electrolyte for the next time for injecting the electrolyte into the battery, and the efficiency is improved.

[0075] The vacuumizing device can be, for example, a scroll vacuum pump, a Roots vacuum pump, a molecular pump, etc., and the present embodiment is not limited thereto.

[0076] Further, as shown in Figure 2 、 Figure 3 and Figure 4 , the dosing assembly 220 comprises a container 221, at least one first liquid storage 222 and an adjusting member 223.

[0077] The container 221 has a containing cavity 2211 for connecting the liquid supply device, the first liquid storage 222 is at least partially located in the containing cavity 2211, the top of the first liquid storage 222 has a liquid inlet in the containing cavity 2211, the bottom of the first liquid storage 222 is in communication with the liquid storage assembly 250, and the adjusting member 223 is used to adjust the amount of liquid entering the first liquid storage 222.

[0078] Specifically, when the electrolyte enters the containing cavity 2211, the electrolyte can enter the first liquid storage 222 through the liquid inlet at the top of the first liquid storage 222 until the first liquid storage 222 is filled, and the capacity of the first liquid storage 222 is the total amount of electrolyte required for the battery to be filled at one time.

[0079] The first liquid storage 222 can be, for example, a liquid storage cup with an open top, as long as the open top can enter the electrolyte and the bottom can be connected to a pipeline to be connected to the liquid storage assembly 250, and the present embodiment is not limited thereto.

[0080] In addition, the number of the first liquid storages 222 is the same as the number of the liquid injection members 260, and they are connected one by one. When a plurality of first liquid storages 222 are provided, they can be sequentially arranged in the containing cavity 2211.

[0081] In some embodiments of the present application, the liquid injection mechanism 200 further comprises a dosing injection pump for connecting the liquid supply device and the containing cavity 2211.

[0082] The container 221 is provided with a liquid discharge pipe 230 in communication with the containing cavity 2211, and the liquid discharge pipe 230 is provided with a liquid discharge valve 240. When the amount of liquid in the first liquid storage 222 reaches a preset value, the liquid discharge valve 240 can be switched from a closed state to an open state, so that the liquid in the containing cavity 2211 flows out from the liquid discharge pipe 230.

[0083] Exemplarily, when judging whether the liquid amount in the first liquid reservoir 222 reaches the preset value, a liquid level sensor can be arranged for each first liquid cup. When the liquid level sensor detects that the liquid amount in the first liquid reservoir 222 reaches the preset value, the drain valve 240 is automatically opened to drain the liquid, so as to drain the excess electrolyte in the containing cavity 2211.

[0084] Exemplarily, the opening and closing of the drain valve 240 can also be manually controlled or directly controlled by the controller without arranging the liquid level sensor. Taking the control by the controller as an example, the quantitative liquid injection pump and the drain valve 240 are in communication connection with the controller. After adjusting the electrolyte amount pumped by the quantitative liquid injection pump each time, the volume of the containing cavity 2211 and the volume of the first liquid reservoir 222, the drain valve 240 can be controlled to be opened after the quantitative liquid injection pump delivers the electrolyte with a preset interval, and the drain valve 240 can be controlled to be closed before the quantitative liquid injection pump delivers the electrolyte each time.

[0085] It can be understood that the drain pipe 230 and the quantitative liquid injection pump can also be controlled by other common ways, which are not limited in the embodiment.

[0086] The drain pipe 230 can be connected with a liquid supply device or a device for recycling electrolyte, which is not limited in the embodiment.

[0087] In order to effectively drain the excess electrolyte in the containing cavity 2211 each time, the inlet of the drain pipe 230 can be arranged at the bottom of the containing cavity 2211, and the number of the drain pipe 230 can be increased to improve the drain speed and basically empty the electrolyte in the containing cavity 2211.

[0088] Part of the electrolyte entering the containing cavity 2211 remains in the containing cavity 2211, and part of the electrolyte enters the first liquid reservoir 222 from the liquid inlet. When the amount of the electrolyte entering the containing cavity 2211 is constant, if it is desired to change the liquid amount that the first liquid reservoir 222 can accommodate to adapt to the liquid injection requirements of different batteries, the capacity of the first liquid reservoir 222 can be adjusted by the adjusting member 223. If the amount of the electrolyte entering the containing cavity 2211 cannot meet the liquid amount required by the first liquid reservoir 222, the capacity of the containing cavity 2211 can be reduced by the adjusting member 223, so as to increase the liquid amount that can enter the first liquid reservoir 222.

[0089] Exemplarily, the adjusting member 223 includes a first adjusting member, which extends at least partially from the top of the containing cavity 2211 into the containing cavity 2211. The volume of the containing cavity 2211 for containing liquid can be changed by adjusting the length of the first adjusting member entering the containing cavity 2211.

[0090] Specifically, the longer the length of the first adjusting member entering the containing cavity 2211, the larger the space occupied, which will result in the decrease of the space of the containing cavity 2211 for containing electrolyte, thereby increasing the electrolyte that can enter the first reservoir 222. In addition, the number of the first adjusting members can be set according to the capacity adjustment range of the containing cavity 2211, which is not limited in the embodiment.

[0091] Exemplarily, the adjusting member 223 further comprises at least one second adjusting member, the second adjusting member corresponding to the first reservoir 222 one by one, and the second adjusting member extending at least partially from the top of the containing cavity 2211 into the containing cavity 2211. The length of the second adjusting member entering the containing cavity 2211 can be adjusted to enter or exit the first reservoir 222 from the liquid inlet of the first reservoir 222, so as to adjust the volume of the first reservoir 222 for containing liquid.

[0092] The first adjusting member and the second adjusting member each comprise an adjusting component 2331 and a first driving member 2232, and the first driving member 2232 can drive the adjusting component 2331 to move, so as to change the length of the adjusting component 2331 extending into the containing cavity 2211.

[0093] The adjusting component 2331 can be a rod, a plate, a ball or other structures, as long as the volume of the containing cavity 2211 or the volume of the first reservoir 222 can be changed by changing the length of the adjusting component 2331 entering the containing cavity 2211.

[0094] Exemplarily, the adjusting component 2331 can be a screw rod, the screw rod being threadedly connected with the container 221, and the first driving member 2232 being a servo motor or other devices capable of accurately controlling the depth of the screw rod entering the containing cavity 2211. When the screw rod is used, the screw rod can be in sealed sliding connection with the container 221 regardless of whether it is driven by the first driving member 2232 to rise or to descend, thereby reducing the influence of external impurities on the electrolyte and helping to improve the adjustment accuracy.

[0095] Exemplarily, the first adjusting member and the second adjusting member can also only comprise a screw rod, so that the length of the screw rod entering the containing cavity 2211 can be changed in a manual rotating manner.

[0096] At this time, in order to facilitate the determination of the adjustment amount, the corresponding positions of the screw rod can be marked by scale lines, so that the adjustment amount can be accurately judged when the screw rod is manually rotated.

[0097] When the servo motor or the like is used as the first driving member 2232, the first driving member 2232 can be in communication connection with a controller, so that the servo motor can be controlled to rotate a corresponding number of turns by the controller, thereby facilitating the adjustment.

[0098] In some embodiments of the present application, the liquid storage assembly 250 comprises at least one second liquid storage 251, the top of the second liquid storage 251 is connected to the bottom of the first liquid storage 222 one by one, and is located below the first liquid storage 222, so that the electrolyte in the first liquid storage 222 can automatically flow into the second liquid storage 251 under the action of gravity, without the need to add additional equipment to provide transport force for the electrolyte.

[0099] In order to facilitate the electrolyte to enter the battery, the height of the first liquid storage 222 and the second liquid storage 251 can also be raised, that is, in the vertical direction, the first liquid storage 222, the second liquid storage 251 and the battery are arranged in a top-down relationship in sequence, the bottom of the first liquid storage 222 is located above the top of the second liquid storage 251, the bottom of the second liquid storage 251 is located above the bottom of the battery, and the liquid injection member 260 is connected to the bottom of the second liquid storage 251. At this time, a liquid injection support 210 can be provided on the rack 100, and the container 221 and the second liquid storage 251 are fixed on the liquid injection support 210.

[0100] Among them, the first control valve 255 is arranged between the second liquid storage 251 and the first liquid storage 222, that is, the first control valve 255 is arranged on the pipeline connecting the first liquid storage 222 and the second liquid storage 251, and the communication and disconnection between the first liquid storage 222 and the second liquid storage 251 can be controlled through the first control valve 255. The second liquid storage 251 is also used to be connected with the vacuum pumping equipment, and the second control valve 254 is arranged between the second liquid storage 251 and the vacuum pumping equipment, that is, the second control valve 254 is arranged on the pipeline connecting the vacuum pumping equipment and the second liquid storage 251, and the communication and disconnection of the pipeline can be controlled through the second control valve 254.

[0101] Among them, the first control valve 255 and the second control valve 254 can be solenoid valves, and can be connected with the controller for control during use.

[0102] Further, the second liquid storage 251 is provided with at least two, so as to simultaneously realize the liquid injection of at least two batteries, and adapt to the use demand. All the second liquid storages 251 are connected with the current collecting member 253, and are connected with the vacuum pumping equipment through the current collecting member 253, and the second control valve 254 is located between the current collecting member 253 and the vacuum pumping equipment.

[0103] Specifically, the flow junction 253 can be fixed on the liquid injection support 210, and the flow junction 253 has a passage therein, which can communicate with all the second liquid reservoirs 251 and the vacuumizing device, so that the vacuumizing operation of the multiple batteries and the second liquid reservoirs 251 can be simultaneously realized through one second control valve 254 and one vacuumizing device, and after the vacuumizing, the electrolyte in the first liquid reservoir 222 can be rapidly introduced into the batteries through the second liquid reservoirs 251 and the liquid injection member 260 by means of the air pressure, and the battery liquid supplementing is completed.

[0104] In addition, a three-way joint 257 can be further added, one interface of the three-way joint 257 is connected with one air port of the flow junction 253, the other interface is connected with the second control valve 254, and the last interface is connected with the dry air through a third control valve 258, so that the vacuumizing is smoothly performed, wherein the third control valve 258 can also be an electromagnetic valve, and is connected with the controller, so as to be controlled. In addition, a negative pressure sensor 256 can be further arranged on the flow junction 253, the pressure in the flow junction 253 is detected through the negative pressure sensor 256, the negative pressure sensor 256 can be connected with the controller, when the pressure in the flow junction 253 reaches the preset pressure value, the controller can control the second control valve 254 to be closed, and the vacuumizing is stopped.

[0105] Optionally, as shown in Figure 2 and Figure 5 The liquid storage assembly 250 further includes a flange 252, the flange 252 is connected with the second liquid reservoir 251, and the second liquid reservoir 251 is fixed on the liquid injection support 100 or the flow junction 253 through the flange 252, wherein the top of the flange 252 is communicated with the flow junction 253, so that the flow junction 253 is communicated with the second liquid reservoir 251, and the side of the flange 252 can be connected with the pipeline communicated with the first liquid reservoir 222, so that the first liquid reservoir 222 is communicated with the second liquid reservoir 251, and the vacuumizing device and the first liquid reservoir 222 can be independently communicated with the second liquid reservoir 251, and do not interfere with each other.

[0106] In use, the electrolyte in the liquid supply device is controlled by the air control valve to enter the containing cavity 2211 or not. The liquid inlet at the top of the first liquid reservoir 222 is located in the containing cavity 2211. After the containing cavity 2211 is filled with electrolyte, the first liquid reservoir 222 is also filled with electrolyte synchronously, so that the quantitative effect is achieved. After being filled with electrolyte, the liquid in the containing cavity 2211 is discharged through the liquid discharge valve 240 and the liquid discharge pipe 230. The adjusting member 223 can adjust the volume of the containing cavity 2211 and the first liquid reservoir 222, so that the precise adjustment of the battery liquid injection amount can be achieved. Before the electrolyte is filled into the battery, the second control valve 254 is opened, vacuum is performed by the vacuum device, so that the second liquid reservoir 251 and the inside of the battery are in a negative pressure state. When the negative pressure sensor 256 detects that the negative pressure is a specified pressure value, the controller controls the second control valve 254 to be closed and controls the first control valve 255 to be opened. The electrolyte in the first liquid reservoir 222 enters the corresponding battery through the second liquid reservoir 251 and the liquid injection member 260 under the action of the pressure difference, so that the quantitative liquid injection is performed.

[0107] It can be understood that the liquid storage assembly 250 can also have other common structures, as long as it can transfer electrolyte and be independently connected with the converging member 253 and the first liquid reservoir 222. The embodiment herein is only illustrative and not limiting.

[0108] Of course, the second liquid reservoir 251 can be a common liquid storage cup or the like, as long as it can store electrolyte. The embodiment herein is not limited thereto.

[0109] Further, in order to more specifically describe the quantitative liquid injection capacity of the liquid injection mechanism 200, an experimental example is provided as follows:

[0110] In the experimental example, two first liquid reservoirs 222 are arranged in the containing cavity 2211, and two second liquid reservoirs 251 are correspondingly arranged. The theoretical liquid injection amount of the battery is set to 140.5g, and the tolerance is set to 6g. The volumes of the two first liquid reservoirs 222 and the containing cavity 2211 are adjusted by the adjusting member 223, so that they are adapted to the theoretical liquid injection amount. The two second liquid reservoirs 251 are marked as cup 1 and cup 2, respectively. Then, the liquid injection is performed at least 100 times, and 100 groups of liquid injection data corresponding to cup 1 and cup 2 are continuously taken. The results are shown in the following table. Figure 10 、 Figure 11

[0111]

[0112] ​Among them, the overall capability index is used to evaluate the overall performance of the process, and these indexes include Pp, PPL, PPU, Ppk and Cpm. They are similar to process capability index, but are usually used for short-term data or initial process evaluation. Pp is the overall capability index, which is an index for measuring the overall variability of the process without considering the center position of the process; Ppl is the lower overall capability index, which is an index for measuring the capability between the average value of the process and the lower limit of the specification; Ppu is the upper overall capability index, which is an index for measuring the capability between the average value of the process and the upper limit of the specification; Ppk is the overall capability index, which is a capability index considering the center position of the process, reflecting the actual overall capability of the process; Cpm is the target overall capability index, which is a capability index considering the target value (T) of the process, reflecting the deviation and variability of the process. Among them, generally, the values of Pp and Ppk greater than 1.33 are considered to be good process capability; values greater than 1.67 indicate very good process capability.

[0113] Cp is the process capability index, which is an index for measuring the potential capability of the process without considering the center position of the process; CPL is the lower process capability index, which is an index for measuring the capability between the average value of the process and the lower limit of the specification; CPU is the upper process capability index, which is an index for measuring the capability between the average value of the process and the upper limit of the specification; CPK is the process capability index, which is a capability index considering the center position of the process, reflecting the actual capability of the process. Among them, the values of Cp and CPK greater than 1.33 are considered to be good process capability; values greater than 1.67 indicate very good process capability.

[0114] From the above experimental data, it can be seen that the Cpk of the cup body 1 and the cup body 2 of the liquid injection mechanism in the embodiment of the application is much greater than 1.67, the process capability is good, the quantitative effect of the liquid injection mechanism 200 is good, the accuracy is high, and the number of the first liquid reservoir 222 and the second liquid reservoir 251 can be adjusted according to the actual situation, which is suitable for different number of battery detection requirements, is very convenient to use, is simple to maintain, and has low cost.

[0115] Compared with the existing mechanical quantitative pump, each channel of the existing mechanical quantitative pump must measure the liquid quantity, the more the number of channels, the greater the influence on the measurement of a single pump, and the cost of increasing the number of pumps is extremely high; the measurement repeatability and accuracy of the electronic control flowmeter are at a medium level, and the accuracy is prone to decrease in long-term use, and the price is expensive; the liquid level sensor is easily affected by medium characteristics and container material factors, resulting in unstable accuracy; the quantitative cup can stop liquid injection by sending a signal through a sensor after the liquid fills the quantitative cup, but it has high requirements for mechanical processing, and the residues in the cup may affect the accuracy of subsequent measurement.

[0116] The liquid injection mechanism 200 in the application embodiment has at least the following advantages by using the container 221, the first liquid reservoir and the second liquid reservoir for battery liquid injection:

[0117] The first driving component can precisely control the position of the adjusting component 2331, so that the injection volume can be accurate to 0.1g. After the relevant parameters are set, the single injection volume can be automatically adjusted by the controller, which can adapt to different injection process requirements.

[0118] Before injecting electrolyte, a vacuum is drawn to use atmospheric pressure difference to force electrolyte into the battery, preventing residual electrolyte in the second reservoir 251.

[0119] The structure is simple, it is easy to increase the number of first liquid reservoirs 222 and second liquid reservoirs 251, and no additional injection pumps and sensors are required. Maintenance is simple and the cost is low.

[0120] For some embodiments of this application, please refer to Figure 6 , Figure 7 As shown, the positioning component 310 includes at least one limiting plate 312 disposed on the frame 100. At least one side of the limiting plate 312 is provided with a floating plate 311. A receiving space 313 for placing the battery is formed between the floating plate 311 and the limiting plate 312. The floating plate 311 can push the battery to move so that the floating plate 311 and the limiting plate 312 respectively contact the opposite sides of the battery, thereby restraining the battery by the floating plate 311 and the limiting plate 312 to prevent the battery from shifting during the thickness measurement process.

[0121] Specifically, the limiting component and floating plate 311 can be made of marble slabs. Marble slabs have good surface flatness, will not scratch the battery, and are inexpensive, resulting in low operating costs. Of course, the limiting component and floating component can also be made of other materials or other structures, as long as the surfaces in contact with the battery are flat, will not affect thickness measurement, and will not scratch the battery.

[0122] At this time, the first sensor 340 can be a distance sensor, such as an ultrasonic sensor, an infrared sensor, a laser rangefinder, a photoelectric sensor, etc. It can be set on the floating plate 311 to measure the distance between the two opposing surfaces of the floating plate 311 and the limiting plate 312. These two surfaces are in contact with the two opposing surfaces of the battery, so the distance measured at this time is the thickness of the battery.

[0123] Of course, the first sensor 340 can also be set on the limiting plate 312, but it is relatively easier to arrange it on the floating plate 311. A clearance hole or slot can be opened at the corresponding position of the floating plate 311 for installing the first sensor 340.

[0124] The floating plate 311 can move relative to the limiting plate 312, making the width of the accommodating space 313 adjustable, thus making it suitable for batteries of different sizes and effectively expanding the application range of the battery testing device.

[0125] Wherein, one or two floating plates 311 can be arranged corresponding to each limiting plate 312, when two floating plates 311 are arranged, they can be arranged on the opposite sides of the limiting plate 312, so that each limiting plate 312 can be used for limiting two batteries, and the number of detectable batteries is increased. The positioning assembly 310 can be arranged with one or more limiting plates 312 according to the requirement of detecting the number of batteries, and the arrangement of the limiting plate 312 on the rack 100 is not limited in the example, and it is appropriate to save space while not affecting the detection of the battery.

[0126] Further, the detection mechanism 300 further comprises at least one driving assembly 320 arranged on the rack 100, the driving assembly 320 is connected with the floating plate 311 one by one, and the driving assembly 320 is used for driving the floating plate 311 to move, so as to adjust the size of the accommodating space 313.

[0127] Optionally, the driving assembly 320 comprises a transmission member 322 and a second driving member 321, the transmission member 322 is connected with the floating plate 311, the second driving member 321 is directly or indirectly connected with the rack 100, and the second driving member 321 is in transmission connection with the transmission member 322, so as to drive the transmission member 322 to push the floating plate 311 to move, and adjust the size of the accommodating space 313.

[0128] The second driving member 321 can be connected with the controller, and the controller controls the second driving member 321 to start driving the floating plate 311 to move when the thickness needs to be measured.

[0129] In actual use, in order to adapt to batteries with different thicknesses and avoid damage to the batteries, the driving assembly 320 further comprises a first connecting member 324, a second connecting member 323, at least one elastic member 326 and a second sensor 325 in the embodiment.

[0130] The first connecting piece 324 is in transmission connection with the transmission piece 322, the second connecting piece 323 is located between the first connecting piece 324 and the floating plate 311, the second connecting piece 323 is provided with a limiting clamping groove 3231 on the side adjacent to the first connecting piece 324, and the first connecting piece 324 is provided with a clamping block 3241 inserted into the limiting clamping groove 3231. The elastic piece 326 is connected with the floating plate 311 and the second connecting piece 323 respectively, and is used to transmit the acting force between the floating plate 311 and the second connecting piece 323. The second sensor 325 is located between the clamping block 3241 and the second connecting piece 323, and when the first connecting piece 324 is driven to move by the second driving piece 321, the second sensor 325 can detect the extrusion force of the clamping block 3241 on the first connecting piece 324, that is, the extrusion force on the bottom of the limiting clamping groove 3231, so as to judge whether the floating plate 311 and the limiting plate 312 are in contact with the surface of the battery. If the extrusion force reaches the preset value, it is judged that the battery can be effectively restrained, at this time, the second driving piece 321 stops acting, so as to avoid pressing the battery.

[0131] Among them, the depth of the limiting clamping groove 3231 can be greater than the thickness of the clamping block 3241, so as to provide installation space for the second sensor 325. The second sensor 325 can be a pressure sensor, such as a piezoresistive pressure sensor or a piezoelectric pressure sensor.

[0132] And the elastic piece 326 can be provided with one or more, so as to effectively connect the second connecting piece 323 and the floating plate 311, and make the floating plate 311 move with the second connecting piece 323 as appropriate. Among them, the elastic piece 326 can be a spring or a common elastic component such as a spring piece, which is not limited in the embodiment.

[0133] Exemplarily, the first connecting piece 324 can be a connecting block, and the end away from the floating plate 311 is connected with the transmission piece 322, and moves forward and backward by driving the transmission piece 322. The second connecting piece 323 can be a transmission plate, which is slidably connected with the rack 100 through at least one mounting seat, that is, a slide rail can be provided on the rack 100, a slide block 370 is provided on the mounting seat, the slide rail extends along the moving direction of the floating plate 311, the slide block 370 is in sliding connection with the slide rail, and the moving direction is limited through the slide rail, so that the moving direction of the second connecting piece 323 can be limited through the slide block 370 and the slide rail.

[0134] For example, one mounting seat can be arranged at each end of the second connecting piece 323, so that the moving direction of the second connecting piece 323 is limited from both ends of the second connecting piece 323, so that the second connecting piece 323 can only move along the extension direction of the guide rail, avoiding the deflection of the second connecting piece 323.

[0135] Exemplarily, the limiting slot 3231 can be formed by two L-shaped plates oppositely arranged on the first connecting piece 324 away from the floating plate 311, forming a limiting slot 3231 with the top and bottom openings, and the clamping block 3241 can be inserted into the limiting slot 3231 from the top or bottom of the limiting slot 3231, and the first connecting piece 324 can extend above or below the limiting slot 3231, thereby being connected with the clamping block 3241.

[0136] When the second driving piece 321 drives the first connecting piece 324 to move to constrain the battery by the floating plate 311, the clamping block 3241 will exert a pushing force on the first connecting piece 324, so that the first connecting piece 324 pushes the floating plate 311 to move, and when the battery is clamped by the floating plate 311 and the limiting plate 312, the elastic piece 326 will be gradually deformed by being pressed, so that the pressing force detected by the second sensor 325 gradually increases, and when the pressing force reaches a preset value, the second driving piece 321 stops working, and the first sensor 340 detects the thickness of the battery.

[0137] After the detection is completed, the second driving piece 321 drives the first connecting piece 324 to move reversely, at this time, the clamping block 3241 is limited by the limiting slot 3231 and cannot be separated from the limiting slot 3231, so as to pull the second connecting piece 323 to move synchronously, and then the floating plate 311 is reset by the elastic piece 326, waiting for the next thickness detection.

[0138] For the second driving piece 321, it only needs to provide a driving force to drive the first connecting piece 324 to move.

[0139] Exemplarily, the second driving piece 321 can be an electric cylinder, and the transmission piece 322 can be a flange 252 disc or other connecting structure, which connects the output end of the electric cylinder with the first connecting piece 324.

[0140] Exemplarily, the second driving piece 321 is a combination of a servo motor, a synchronous belt and a transmission seat, the transmission piece 322 can be a lead screw, the lead screw is threadedly connected with the transmission seat, the synchronous belt drives the transmission seat to rotate, and the clamping block 3241 and the limiting block make the first connecting piece 324 unable to rotate, so that when the servo motor drives the transmission seat to rotate through the synchronous belt, the lead screw moves forward and backward, thereby driving the first connecting piece 324 fixed at one end of the lead screw to move synchronously.

[0141] In some embodiments of the present application, the detection mechanism 300 further comprises a mounting block 350 for placing the battery, the mounting block 350 is located at the bottom of the accommodating space 313, the width of the mounting block 350 is smaller than the thickness of the battery, and the mounting block 350 is connected with the floating plate 311 to drive the battery to move under the driving of the floating plate 311.

[0142] Specifically, a connecting plate 360 can be connected to the bottom of the floating plate 311 through a connecting rod or the like, and the mounting block 350 can be arranged on the connecting plate 360, and a structure adapted to the battery can be arranged on the mounting block 350, so that the battery placed on the mounting block 350 can be limited to a certain extent, and one surface can be attached to the floating plate 311.

[0143] The mounting block 350 can be a block structure with a short length, and the number thereof can be determined according to the support requirements of the battery. In addition, the mounting block 350 can be made of marble, which is flat and helps to reduce costs. Of course, the mounting block 350 can also be made of other materials, which is not limited in the present embodiment.

[0144] In some embodiments of the present application, the detection mechanism 300 further comprises at least one test assembly 330, the test assembly 330 is connected one-to-one with the floating plate 311, and the test assembly 330 is used to detect the performance of the corresponding battery.

[0145] When the battery is placed on the mounting block 350, the related performance of the battery can be detected by the test assembly 330, such as capacity, OCV, DCIR, and ACIR, so that multiple detections of the battery can be completed without moving the battery, further improving the convenience of detection.

[0146] It can be understood that these related detections only need to increase corresponding probes to be connected with the positive and negative poles of the battery, and the specific detection methods are well known to those skilled in the art.

[0147] Further, the test assembly 330 comprises a first mounting piece 331 and a second mounting piece 332 arranged at both ends of the mounting block 350, the first mounting piece 331 and the second mounting piece 332 are connected with the floating plate 311, the first mounting piece 331 and / or the second mounting piece 332 are provided with a detection piece 333 for detecting the performance of the battery, and the liquid injection piece 260 is arranged on the first mounting piece 331 or the second mounting piece 332.

[0148] Some detection items only need to contact one side of the battery, and some detection items need to contact the positive or negative pole of the battery, so the corresponding detection piece 333 can be arranged on the first mounting piece 331 or the second mounting piece 332 according to the situation, or the detection piece 333 can be arranged on both the first mounting piece 331 and the second mounting piece 332.

[0149] Specifically, the bottom of the first mounting member 331 and the second mounting member 332 can be provided with a sliding block 370, and a sliding rail is arranged at the corresponding position of the rack 100, the sliding block 370 is connected with the sliding rail, so as to limit the moving direction of the first mounting member 331 and the second mounting member 332 through the sliding rail, and the second mounting member 332 and the first mounting member 331 are connected with the floating plate 311, and the moving direction of the floating plate 311 and the battery can be limited synchronously as the floating plate 311 moves.

[0150] Exemplarily, the two ends of the connecting plate 360 can be connected with the first mounting member 331 and the second mounting member 332 correspondingly.

[0151] In this way, when the battery is pushed to move by the floating plate 311, the corresponding detection member 333 and the liquid injection member 260 can move synchronously, and the relative position between the battery and the detection member 333 and the liquid injection member 260 does not change, so as not to affect the connection between the battery and the detection member 333 and the liquid injection member 260.

[0152] Further, a third driving member can be arranged on the first mounting member 331 and / or the second mounting member 332, and the third driving member is used to drive the detection member 333 to move towards the direction of approaching or moving away from the battery, so as to make the detection member 333 contact or separate from the battery.

[0153] Specifically, the third driving member can be a gas cylinder or an electric cylinder, and the output end of the third driving member is in contact with the detection member 333 and the liquid injection member 260, so as to push the detection member 333 and the liquid injection member 260 to move.

[0154] Optionally, a sliding table which is slidably connected with the first mounting member 331 or the second mounting member 332 can be arranged on the first mounting member 331 and the second mounting member 332, the third driving member is fixed on the first mounting member 331 or the second mounting member 332, and the output end is connected with the sliding table, the detection member 333 and the liquid injection member 260 can be arranged on the sliding table at the same time, only the sliding table needs to be driven to move, and all the elements arranged on the sliding table can move synchronously, and only the position of the different detection members 333 arranged on the sliding table needs to be adjusted, so as to make the different detection members 333 contact with different positions of the battery to perform corresponding detection.

[0155] In use, if it is necessary to limit the position of the battery, the floating plate 311 is put into the restraint state, the second driving member 321 drives the floating plate 311 to move, and the limiting plate 312 restrains the battery together. If it is not necessary to limit the position of the battery, the second driving member 321 drives the floating plate 311 to move reversely. When it is necessary to inject liquid into the battery or detect the performance of the battery, the third driving member controls the slide table to extend, and the detecting member 333 and the injecting member 260 contact the corresponding positions of the battery. Therefore, only by connecting the detecting power supply, the vacuum extraction equipment, the liquid supply equipment and other devices, the battery can be pre-charged, formed, fully charged, supplemented, divided, OCV, DCIR, ACIR, injected and processed in the same work station, and the battery does not need to be frequently moved, which can improve the convenience of the battery detection and protect the battery.

[0156] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0157] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the appended claims.

Claims

1. A battery testing device, characterized in that, It includes a frame (100), a detection mechanism (300) mounted on the frame (100), and a liquid injection mechanism (200), wherein: The detection mechanism (300) includes a positioning component (310) and a first sensor (340). The positioning component (310) is used to contact two surfaces opposite to the battery to position the battery. The first sensor (340) is configured to measure the thickness of the battery when the positioning component (310) contacts the battery. The liquid injection mechanism (200) includes a liquid injection component (260) for connecting to the liquid injection port of the battery to fill the battery with electrolyte.

2. The battery testing device according to claim 1, characterized in that, The liquid injection mechanism (200) further includes: A metering component (220) is used to connect to a liquid supply device for supplying the electrolyte; At least one liquid storage component (250) is connected to the metering component (220) and the injection device (260), and the liquid storage component (250) is also used to connect the injection device (260) and a vacuum device; The metering component (220) is configured to deliver the electrolyte into the storage component (250) according to a preset amount of liquid when the electrolyte is filled into the battery by the injection component (260).

3. The battery testing device according to claim 2, characterized in that, The quantitative component (220) includes: The container (221) has a receiving cavity (2211) for connecting the liquid supply device; At least one first reservoir (222) is located at least partially within the receiving cavity (2211), the top of the first reservoir (222) having an inlet located within the receiving cavity (2211), and the bottom of the reservoir communicating with the reservoir assembly (250); Adjustment element (223) is used to adjust the amount of liquid entering the first liquid reservoir (222).

4. The battery testing device according to claim 3, characterized in that, The liquid injection mechanism (200) further includes a metering injection pump, which is used to connect the liquid supply device and the receiving cavity (2211); The container (221) is provided with a drain pipe (230) communicating with the receiving cavity (2211). The drain pipe (230) is provided with a drain valve (240). The drain valve (240) is configured to switch from a closed state to an open state when the amount of liquid in the first liquid reservoir (222) reaches a preset value, so that the liquid in the receiving cavity (2211) flows out from the drain pipe (230).

5. The battery testing device according to claim 3, characterized in that, The adjusting member (223) further includes at least one second adjusting member corresponding to the first liquid reservoir (222). The second adjusting member extends at least partially from the top of the receiving cavity (2211) into the receiving cavity (2211). The second adjusting member is configured to adjust the volume of the first liquid reservoir (222) for containing liquid by adjusting its length into the first liquid reservoir (222).

6. The battery testing device according to claim 5, characterized in that, The adjusting member (223) includes a first adjusting member that extends at least partially from the top of the receiving cavity (2211) into the receiving cavity (2211), the first adjusting member being configured to change the volume of the receiving cavity (2211) for containing liquid by adjusting the length of the first adjusting member entering the receiving cavity (2211).

7. The battery testing device according to claim 6, characterized in that, Both the first and second adjusting members include an adjusting component (2331) and a first driving component (2232). The first driving component (2232) is configured to drive the adjusting component (2331) to move in order to change the length of the adjusting component (2331) extending into the receiving cavity (2211) or the first liquid reservoir (222).

8. The battery testing device according to claim 3, characterized in that, The liquid storage assembly (250) includes at least one second liquid storage tank (251), the top of the second liquid storage tank (251) is connected to the bottom of the first liquid storage tank (222) in a one-to-one correspondence and is located below the first liquid storage tank (222), a first control valve (255) is provided between the second liquid storage tank (251) and the first liquid storage tank (222), the second liquid storage tank (251) is also used to connect the vacuum pumping device, and a second control valve (254) is provided between the second liquid storage tank (251) and the vacuum pumping device.

9. The battery testing device according to claim 8, characterized in that, At least two second liquid reservoirs (251) are provided. All second liquid reservoirs (251) are connected to manifolds (253) and connected to the vacuum pumping device through manifolds (253). The second control valve (254) is located between manifolds (253) and the vacuum pumping device.

10. The battery testing device according to any one of claims 1-9, characterized in that, The positioning component (310) includes at least one limiting plate (312) disposed on the frame (100), the limiting plate (312) having a floating plate (311) disposed on at least one side, the floating plate (311) and the limiting plate (312) forming an accommodating space (313) for placing the battery, the floating plate (311) being configured to push the battery to move so that the battery is clamped between the floating plate (311) and the limiting plate (312).

11. The battery testing device according to claim 10, characterized in that, The detection mechanism (300) further includes a drive assembly (320) disposed on the frame (100). The drive assembly (320) is connected to the floating plate (311) in a one-to-one correspondence. The drive assembly (320) is configured to drive the floating plate (311) to move in order to adjust the size of the accommodating space (313).

12. The battery testing device according to claim 11, characterized in that, The drive component (320) includes: The transmission component (322) is connected to the floating plate (311); The second drive member (321) is disposed on the frame (100) and is connected to the transmission member (322) in a transmission manner. The second drive member (321) is configured to drive the transmission member (322) to push the floating plate (311) to move.

13. The battery testing device according to claim 12, characterized in that, The drive component (320) also includes: The first connecting member (324) is connected to the transmission member (322) in a transmission connection; The second connector (323) is located between the first connector (324) and the floating plate (311). A limiting slot (3231) is provided on the side of the second connector (323) adjacent to the first connector (324). A card block (3241) is provided on the first connector (324) and inserted into the limiting slot (3231). At least one elastic element (326) is connected to the floating plate (311) and the second connecting element (323), respectively; A second sensor (325) is located between the card block (3241) and the second connector (323). The second sensor (325) is configured to detect the pressing force applied by the card block (3241) to the first connector (324) when the first connector (324) is driven to move by the second driving member (321), so as to determine whether the floating plate (311) and the limiting plate (312) are in contact with the battery surface.

14. The battery testing device according to claim 10, characterized in that, The detection mechanism (300) further includes at least one mounting block (350) for supporting the battery. The mounting block (350) is located at the bottom of the accommodating space (313). The width of the mounting block (350) is less than the thickness of the battery. The mounting block (350) is connected to the floating plate (311) to drive the battery to move under the drive of the floating plate (311).

15. The battery testing device according to claim 14, characterized in that, The testing mechanism (300) further includes at least one testing component (330), which is connected to the floating plate (311) in a one-to-one correspondence, and the testing component (330) is used to test the performance of the corresponding battery.

16. The battery testing device according to claim 15, characterized in that, The test component (330) includes a first mounting component (331) and a second mounting component (332) disposed at both ends of the mounting block (350). Both the first mounting component (331) and the second mounting component (332) are connected to the floating plate (311). The first mounting component (331) and / or the second mounting component (332) are provided with a detection component (333) for detecting the battery performance. The liquid injection component (260) is disposed on the first mounting component (331) or the second mounting component (332).

17. The battery testing device according to claim 16, characterized in that, A third driving member is provided on the first mounting member (331) and / or the second mounting member (332), the third driving member being configured to drive the detection member (333) and the liquid injection member (260) to move so that the detection member (333) and the liquid injection member (260) come into contact with the battery.

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