Battery volume testing device

Abstract

The utility model relates to the field of battery testing, particularly discloses a battery volume testing device, and aims to solve the problem of how to improve the testing efficiency while improving the accuracy of battery volume measurement. In order to achieve the purpose, according to the battery volume testing device, the first weighing piece is arranged on the lifting piece, the weighing piece can weigh the mass of the battery to be tested and the mass of the battery to be tested completely placed in the liquid, the buoyancy of the battery to be tested is obtained by calculating the difference between the mass of the battery to be tested and the mass of the battery to be tested completely placed in the liquid, and the volume of the battery can be calculated without discharging the liquid. And the measurement accuracy of the battery volume is improved. Besides, at least two lifting pieces are arranged, and each lifting piece can be connected with the to-be-tested battery, so that the volume measuring device can load at least two to-be-tested batteries at the same time, the battery volume testing efficiency is improved, and the problem that the testing efficiency is affected as an existing measuring device only supports loading of one to-be-tested battery is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, and specifically provides a battery volume testing device. Background Art

[0002] As an energy carrier, batteries undergo constant chemical reactions and material deformation during use, causing their shape to continuously change with usage. During storage or cycling, internal pressure increases due to changes in electrode thickness or gas production, causing the battery's volume to change. In severe cases, this can cause swelling, which in turn affects the battery's electrical and safety performance. Therefore, the volume change of a battery under different conditions has become a key indicator of battery performance.

[0003] Currently, battery volume measurement is typically performed using the liquid displacement method. Specifically, the battery is immersed in liquid and the volume of liquid discharged is observed to determine its volume. However, when the liquid level rise is small, errors occur, resulting in low measurement accuracy. Furthermore, existing measurement devices only support loading one battery at a time. After measuring the volume of a battery, the previously measured battery must be unloaded and reloaded with the next one, resulting in low battery volume measurement efficiency.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the above technical problem, namely, how to improve the accuracy of battery volume measurement while improving the test efficiency. To this end, the present invention provides a battery volume test device, comprising:

[0006] a container and a supporting mechanism, wherein the container is used to contain a liquid;

[0007] a lifting mechanism comprising at least two lifting members, wherein a first end of each lifting member is disposed on the supporting mechanism and a second end is used to connect to a battery to be tested, and a distance of each battery to be tested relative to the container in a first direction is adjustable so that the battery to be tested on the lifting member can be moved in and out of the container;

[0008] A first weighing member is provided on the lifting member, and is used to weigh the mass of the battery to be tested and the mass of the battery to be tested after being completely placed in the liquid.

[0009] In the preferred technical solution of the above-mentioned battery volume testing device, the pulling mechanism further includes:

[0010] A connecting plate or connecting rod is provided on the supporting mechanism, and the connecting plate or connecting rod is provided with the pulling member and is configured to drive the pulling member to rotate so that the battery to be tested on the pulling member can correspond to the container in the first direction.

[0011] In the preferred technical solution of the above-mentioned battery volume testing device, the pulling mechanism further includes:

[0012] A first driving member is provided on the supporting mechanism, and an output end of the first driving member is connected to the connecting plate or the connecting rod, and is used for driving the connecting plate or the connecting rod to rotate.

[0013] In the preferred technical solution of the above-mentioned battery volume testing device, the battery volume testing device further includes:

[0014] A weighing mechanism is provided with the container, and is used to weigh the mass of the container containing the liquid and the mass of the container when the battery to be tested is completely placed in the liquid.

[0015] In the preferred technical solution of the above-mentioned battery volume testing device, the weighing mechanism includes:

[0016] a weighing platform, on which the container is arranged;

[0017] A second weighing member is provided on the weighing platform.

[0018] In the preferred technical solution of the above-mentioned battery volume testing device, the battery volume testing device further includes:

[0019] A first lifting mechanism is provided with the weighing platform so that the container can be moved closer to or farther away from the battery to be tested.

[0020] In the preferred technical solution of the above-mentioned battery volume testing device, the support mechanism includes:

[0021] A support rod, the support rod being arranged along a first direction;

[0022] A first connecting rod is arranged along a second direction, and a first end of the first connecting rod is connected to the support rod, and a second end of the first connecting rod is connected to the lifting member; the second direction is perpendicular to the first direction.

[0023] In the preferred technical solution of the above-mentioned battery volume testing device, the support mechanism includes:

[0024] A second connecting rod is arranged along the first direction, and a first end of the second connecting rod is connected to the second end of the first connecting rod, and a second end of the second connecting rod is connected to the lifting member.

[0025] In a preferred technical solution of the above-mentioned battery volume testing device, the second end of the first connecting rod is slidably disposed on the support rod, and the support mechanism further includes a second lifting mechanism, wherein an output end of the second lifting mechanism is connected to the first connecting rod so as to drive the first connecting rod to move along the support rod in the first direction;

[0026] The support rod is a telescopic rod.

[0027] In a preferred technical solution of the above-mentioned battery volume testing device, the battery volume testing device further includes a box, which is arranged at the second end of the pulling member and is used to carry the battery to be tested, and the box is provided with a connecting hole; or the battery volume testing device further includes a tray, which is arranged at the second end of the pulling member and is used to place the battery to be tested, and the tray is provided with a connecting hole; and / or

[0028] When the lifting member is a lifting rope, the battery volume testing device also includes a second driving member arranged on the supporting mechanism and a reel pivotally connected to the second driving member, the first end of the lifting rope is fixed on the reel, and the second end is connected to the battery to be tested; or when the lifting member is a lifting rod, the lifting rod is a telescopic rod.

[0029] Those skilled in the art will appreciate that the battery volume testing device of the present application provides a first weighing member on the lifting member. The weighing member can weigh the mass of the battery to be tested and the mass of the battery to be tested completely immersed in liquid, and the difference between the two is used to obtain the buoyancy of the battery to be tested, thereby calculating the volume of the battery. This allows the present application to calculate the volume of the battery without draining the liquid, thereby improving the accuracy of battery volume measurement. In addition, by providing at least two lifting members, each of which can be connected to the battery to be tested, the battery volume testing device can simultaneously load at least two batteries to be tested, thereby improving the efficiency of battery volume testing and resolving the problem that existing measuring devices only support loading one battery to be tested, which affects test efficiency.

[0030] Furthermore, by arranging the connecting plate or connecting rod to be able to rotate with the lifting member, so that the battery to be tested on the lifting member can correspond to the container in the first direction, it is convenient to adjust the distance between the container and the battery to be tested, and then obtain the mass of the battery to be tested and the mass of the battery to be tested completely placed in the liquid.

[0031] Furthermore, by using the first driving member to drive the connecting plate or the connecting rod to rotate, the battery to be tested on the pulling member can be aligned with the container in the first direction, reducing human intervention and improving the battery volume testing efficiency.

[0032] Furthermore, by using a weighing mechanism to measure the mass of the container containing the liquid and the mass of the container when the battery under test is completely immersed in the liquid, the difference between the two values ​​can be used to determine the buoyancy of the battery, and thus the battery volume. Furthermore, by using both the first weighing member and the weighing mechanism to measure the battery volume, a more comprehensive and accurate measurement of the battery volume is achieved, improving the reliability of the measurement results.

[0033] Furthermore, by arranging the weighing platform to be able to move the container closer to or away from the battery to be tested, the distance between the container and the battery to be tested can be adjusted, which facilitates weighing the mass of the container containing liquid and the mass of the container when the battery to be tested is completely placed in the liquid.

[0034] Furthermore, the support rod and / or the first connecting rod drives the battery to be tested toward or away from the container, which facilitates measurement of the mass of the battery to be tested and the mass of the battery to be tested completely immersed in the liquid.

[0035] Furthermore, by providing a connecting hole in the box or tray so that the box can be completely immersed in the liquid, it is convenient to accurately measure the volume of the battery. In addition, by using a lifting rod or lifting rope to move the battery to be tested toward or away from the container, it is convenient to measure the mass of the battery to be tested and the mass of the battery to be tested completely immersed in the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The preferred embodiments of the present application are described below with reference to the accompanying drawings, in which:

[0037] Figure 1 A schematic diagram of an embodiment of a battery volume testing device of the present application;

[0038] Figure 2 This is a schematic diagram of another embodiment of the battery volume testing device of the present application.

[0039] Description of Reference Numerals

[0040] 1. Support mechanism; 11. Support rod; 12. First connecting rod; 13. Second connecting rod; 14. Base; 2. Lifting mechanism; 21. Connecting plate; 22. Lifting rope; 23. Connecting rod; 3. Container; 4. Weighing platform; 5. Box body; 51. Connecting hole. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application. For example, although this embodiment is described in conjunction with an HJT cell, this is not intended to limit the scope of protection of the present application. Without departing from the principles of the present application, those skilled in the art can apply the present application to other solar cells, such as PERC cells, Topcon cells, etc.

[0042] It should be noted that in the description of this application, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be understood as limiting this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0043] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0044] Combine Figure 1-2 , the battery volume testing device of this application is introduced.

[0045] like Figure 1-2 As shown, in order to solve the problem of how to improve the test efficiency while improving the accuracy of battery volume measurement. The battery volume testing device of the present application includes a pulling mechanism 2, a container 3, a supporting mechanism 1 and a first weighing piece. Among them, the container 3 is used to contain liquid. The pulling mechanism 2 includes at least two pulling members, the first end of each pulling member is arranged on the supporting mechanism 1, and the second end is used to connect the battery to be tested, and the distance of each battery to be tested relative to the container 3 in the first direction is adjustable, so that the battery to be tested on the pulling member can enter and exit the container 3. The first weighing piece is arranged on the pulling mechanism 2, and is used to weigh the mass of the battery to be tested and the mass of the battery to be tested after it is completely placed in the liquid.

[0046] The battery volume testing device of the present application measures the volume of the battery in the following manner: before the battery on the lifting member is placed in the liquid, the first weighing member first weighs the mass of the battery, which is recorded as m1. This step can measure the actual mass of the battery to be measured. When the battery on the lifting member is completely immersed in the liquid in the container 3, the first weighing member can weigh the mass of the battery to be measured completely placed in the liquid, which is recorded as m2. This step is to obtain the mass of the battery to be measured when it is subjected to the buoyancy of the liquid. Therefore, the difference between m1 and m2 is the buoyancy F exerted on the battery. 浮 , then according to the buoyancy formula F 浮 =ρ 液 gV to obtain the battery volume V. Here, ρ is the density of the liquid. Furthermore, after completing the volume measurement of a battery on a pull-up member, when measuring the volume of the battery to be measured on the next pull-up member, the battery on that pull-up member can be removed and the unmeasured battery to be measured can be reinstalled for the next measurement.

[0047] This application improves the accuracy of battery volume measurement by providing a first weighing member on the lifting member. This weighing member can weigh the mass of the battery under test and the mass of the battery under test completely immersed in liquid. By calculating the difference between the two, the buoyancy of the battery under test can be obtained. This allows the battery volume to be calculated without draining the liquid, thereby improving the accuracy of battery volume measurement. In addition, by providing at least two lifting members, each of which can be connected to the battery under test, the volume testing device can simultaneously load at least two batteries under test, improving the efficiency of battery volume testing and resolving the problem that existing measurement devices only support loading one battery under test, which affects test efficiency.

[0048] Refer to the following Figure 1-2 , a preferred embodiment of the battery volume testing device of the present application is introduced. Those skilled in the art will understand that the embodiment described below is only used to illustrate the principle of the present application and is not intended to limit the scope of protection of the present application. On the premise that the battery volume testing device at least includes a pulling mechanism 2, a container 3, a support mechanism 1 and a first weighing member, those skilled in the art can adjust the following settings so that the present application can be applied to more specific application scenarios.

[0049] See also Figure 1-2 The battery volume testing device includes a supporting mechanism 1, a pulling mechanism 2, a container 3, a first weighing piece, and a weighing mechanism. The supporting mechanism 1 is provided with a pulling mechanism 2, which can be connected to the battery to be tested. The weighing mechanism is provided with a container 3, which is loaded with liquid. The first weighing piece is used to weigh the mass of the battery to be tested before it is immersed in the liquid and the mass of the battery to be tested when it is completely immersed in the liquid. The difference between the two values ​​can be used to obtain the buoyancy of the battery in the liquid, and then the buoyancy calculation formula F is used. 浮 =ρ 液The weighing mechanism is used to measure the mass of the liquid-filled container 3 before the battery is immersed in the liquid, and the mass of the container 3 when the battery is fully immersed in the liquid. The difference between the two values ​​can be used to determine the buoyancy of the battery in the liquid, and the battery volume can be calculated using the buoyancy calculation formula. Using these two methods to measure the battery volume facilitates a more comprehensive and accurate measurement of the battery volume, improving the reliability of the measurement results.

[0050] It should be noted that this application does not limit the specific type of liquid, as long as the liquid has a known density, low volatility, does not damage the battery, and does not produce harmful gases. For example, the liquid can be water.

[0051] In addition, in other preferred embodiments, the weighing mechanism is not necessary, and those skilled in the art can select it as needed. In the case where the weighing mechanism is not provided, the volume of the battery can also be obtained by the first weighing member.

[0052] See also Figure 1-2 As shown, the support mechanism 1 includes a base 14, a support rod 11, a first connecting rod 12 and a second connecting rod 13. The support rod 11 is arranged on the base 14 and extends in a first direction (such as Figure 1 The first connecting rod 12 is provided above the support rod 11 and extends in the second direction (as shown in the Z direction). Figure 1 The first connecting rod 12 extends in the first direction (X direction shown), and the second direction is perpendicular to the first direction. The first end of the first connecting rod 12 is arranged on the support rod 11, and the second end is provided with a second connecting rod 13. The second connecting rod 13 extends along the first connecting rod 12 in the first direction, and the second connecting rod 13 and the support rod 11 are arranged on the same side of the first connecting rod 12. The first end of the second connecting rod 13 is connected to the first connecting rod 12, and the second end is connected to the lifting mechanism. Among them, the support rod 11 is a telescopic rod, which can drive the first connecting rod 12 to move in the first direction, so that the lifting mechanism on the second connecting rod 13 can also move in the first direction, so that the battery to be tested on the lifting mechanism can be close to or away from the container 3, so that the first weighing piece can weigh the mass of the battery to be tested and the mass of the battery to be tested when it is completely placed in the liquid.

[0053] It should be noted that moving in the first direction includes: Figure 1-2 The arrows in the X direction indicate positive and negative directions.

[0054] Of course, the manner in which the distance between the battery under test and the container 3 is adjustable in this application is not fixed, and those skilled in the art may adjust it according to specific circumstances. For example, the first end of the first connecting rod 12 is slidably mounted on the support rod 11, and the support mechanism 1 further includes a second lifting mechanism, the output end of which is connected to the first connecting rod 12 to drive the first connecting rod 12 to move along the support rod 11 in the first direction, thereby enabling the lifting mechanism on the second connecting rod 13 to move in the first direction. Alternatively, the second connecting rod 13 may be a telescopic rod, which can also enable the lifting mechanism on the second connecting rod 13 to move in the first direction.

[0055] It should be noted that in other preferred embodiments, the second connecting rod 13 is not required, and those skilled in the art may adjust it according to the desired configuration. In the absence of the second connecting rod 13, the lifting member is directly mounted on the first connecting rod 12. Furthermore, the base 14 is not required, and those skilled in the art may select it based on the actual situation. In the absence of the base 14, the support rod 11 may be fixed to a desired location (e.g., a workbench).

[0056] See next Figure 1 The pulling mechanism 2 includes a connecting plate 21 and four pulling ropes 22. The connecting plate 21 is circular, with the center of its first end surface connected to the second end of the second connecting rod 13. Four pulling ropes 22 are circumferentially spaced along the outer edge of the second end surface, each used to connect to a battery under test. By providing four first weighing elements connected to the pulling ropes 22 on the connecting plate 21, each first weighing element can separately weigh the mass of the battery under test connected to the pulling rope 22.

[0057] Of course, the present application does not have a fixed setting for the lifting mechanism 2, and those skilled in the art can adjust it according to the setting needs. For example, the lifting member can also be a lifting rod. And / or, the lifting mechanism 2 can also include a connecting rod 23, and the lifting member is set on the connecting rod 23, such as Figure 2 When the lifting mechanism 2 includes a connecting rod 23 and a lifting rope 22, a lifting rope 22 can be provided at each end of the connecting rod 23 in the longitudinal direction. Furthermore, the number of lifting members provided in this application is not fixed and can be adjusted by those skilled in the art based on the required configuration. For example, the number of lifting members can be 2, 3, or another number, as long as the number of lifting members is greater than or equal to 2.

[0058] It should be noted that in other preferred embodiments, the connection plate 21 is not required and can be selected by those skilled in the art based on the desired configuration. For example, if the connection plate 21 is not provided, multiple lifting rods can be directly provided at the second end of the second connecting rod 13. In this case, each lifting rod can be inclined relative to the second connecting rod 13 to prevent the batteries under test on the multiple lifting rods from interfering with each other.

[0059] Of course, the manner in which the distance between the battery to be tested and the container 3 is adjustable in the present application is not fixed, and those skilled in the art can adjust it according to specific circumstances. For example, when the pulling member is a pulling rope 22, the battery volume testing device also includes a second driving member arranged on the support mechanism 1 and a reel pivotally connected to the second driving member, the first end of the pulling rope 22 is fixed on the reel, and the second end is connected to the battery to be tested. Alternatively, when the pulling member is a pulling rod, the pulling rod is a telescopic rod. Among them, when the pulling member is a pulling rope 22, the second end of the pulling rope 22 needs to bypass the first weighing member and be connected to the battery to be tested, so that the first weighing member can measure the mass of the battery to be tested.

[0060] See next Figure 1 The pulling mechanism 2 also includes a first driving member (not shown in the figure). The fixed end of the first driving member is set on the second connecting rod 13, and the output end thereof is connected to the center of the first end face of the connecting plate 21. The connecting plate 21 can drive the battery to be tested on the pulling rope 22 to rotate under the action of the first driving member, so that the battery to be tested on the pulling rope 22 can correspond to the container 3 in the first direction, which is conducive to the battery to be tested entering the liquid in the container 3.

[0061] In other preferred embodiments, the provision of a first driving member is not essential and can be selected by those skilled in the art as needed. Without the first driving member, the connecting plate 21 can be rotatably connected to the second end of the second connecting rod 13. Manual rotation of the connecting plate 21 can also align the battery under test with the container 3 in the first direction. Alternatively, the position of the container 3 can be adjusted to align the battery under test with the container 3 in the first direction.

[0062] See next Figure 1The battery volume testing device also includes a box body 5, which is rectangular and has an open design on one side close to the connecting plate 21. The pulling rope 22 includes a main rope and a branch rope, and the main rope is connected to the first weighing piece. Branch ropes are provided at the four corners of the open end of the box body 5, and the four branch ropes are connected to the main rope. The battery to be tested can be placed in the box body 5 through the opening. The four side walls of the box body 5 and the side away from the connecting plate 21 are provided with multiple connecting holes 51, so that the box body 5 can be completely immersed in the liquid. When measuring the volume of the battery, when there is no battery to be tested in the box body 5, when the box body 5 is completely immersed in the liquid in the container 3, the first weighing piece weighs the mass of the box body 5, which is recorded as m3. When a battery to be tested is placed in the box body 5, when the box body 5 is completely immersed in the liquid in the container 3, the first weighing piece weighs the mass of the box body 5, which is recorded as m4. Among them, the difference between m3 and m4 is the battery buoyancy Fbuoyancy, and then according to the buoyancy formula F 浮 =ρ 液 gV is used to obtain the volume V of the battery. Here, ρ is the density of the liquid. By weighing the box 5 without and with batteries, and then calculating the volume of the battery to be tested based on the battery volume calculation formula, the operation is simpler and the measurement results are more accurate.

[0063] Of course, the present application is not fixed for the device carrying the battery to be tested, and those skilled in the art can adjust it according to the needs of the setting. For example, the battery volume testing device also includes a tray, and a plurality of connecting holes 51 are provided on the tray. The battery to be tested can be placed directly into the box 5. A plurality of pulling ropes 22 are provided along the outer edge of the tray at intervals along its circumference, and the pulling ropes 22 are all connected to a first weighing member on the connecting plate 21. In addition, the present application is not fixed for the setting form of the box 5, and those skilled in the art can adjust it according to the needs of the setting. For example, the box 5 can also be cylindrical. And / or, a plurality of connecting holes 51 can be provided only on the side of the box 5 away from the connecting plate 21.

[0064] Furthermore, the present application does not limit the number of communication holes 51, as long as the housing 5 can be completely immersed in the liquid in the container 3. For example, the number of communication holes 51 can be one, two, or another number. When the number of communication holes 51 is relatively small, the cross-sectional area of ​​the communication holes 51 can be increased, as long as the communication holes 51 on the side of the housing 5 away from the connecting plate 21 can prevent the battery under test from falling.

[0065] See next Figure 1-2The weighing mechanism includes a weighing platform 4 and a second weighing piece arranged on the weighing platform 4. A container 3 is arranged on the weighing platform 4, so that the second weighing piece can weigh the mass of the container 3 containing the liquid and the mass of the container 3 when the box 5 loaded with the battery to be tested is completely immersed in the liquid. When measuring the volume of the battery, when there is no battery to be tested in the box 5, when the box 5 is completely immersed in the liquid in the container 3, the second weighing piece weighs the mass of the container 3, which is recorded as m5. When a battery to be tested is placed in the box 5, when the box 5 is completely immersed in the liquid in the container 3, the second weighing piece weighs the mass of the container 3, which is recorded as m6. The difference between m6 and m5 is the battery buoyancy F 浮 , then according to the buoyancy formula F 浮 =ρ 浮 gV is the volume V of the battery. Where ρ is the density of the liquid. By successively weighing the weight of the container 3 when the box 5 without batteries is completely immersed in the liquid and the weight of the box 5 after batteries are fully immersed in the liquid, and then calculating the volume of the battery to be tested based on the battery volume calculation formula, the operation process is simpler and the measurement results are more accurate.

[0066] At this time, the present application can simultaneously use two methods to measure the volume of the battery. The first method is to use a first weighing member to weigh the weight of the container 3 when the box 5 without batteries is completely immersed in the liquid and the weight of the box 5 after the batteries are loaded, and calculate the volume of the battery to be tested based on the battery volume calculation formula. The second method is to use a weighing mechanism to weigh the weight of the box 5 without batteries and the weight of the box 5 after the batteries are loaded, and calculate the volume of the battery to be tested based on the battery volume calculation formula. It is also possible to use only one method to measure the volume of the battery. When the battery volume is measured simultaneously using the above two methods, if the difference in the battery volume obtained by the two methods is less than the set value, it is considered that the measurement results of the first weighing member and the weighing mechanism are both reliable. At this time, the average value of the measurement results of the two methods can be used as the final battery volume. When the difference in the battery volume obtained by the two methods is greater than or equal to the set value, it is considered that the measurement results of the first weighing member and the weighing mechanism are both reliable, and there is a problem with the battery volume testing device, which needs to be repaired or maintained. By using two methods to measure the volume of the battery, on the one hand, the accuracy of the battery measurement can be improved, and on the other hand, the problems that may exist in the measuring device can be discovered and solved in time, thereby effectively avoiding the impact on the accuracy of the battery measurement. Among them, the set value can be artificially formulated, such as 1cm 3 .

[0067] It should be noted that when the battery volume test device does not include a box 5, when measuring the battery volume, the second weighing device weighs the mass of the container 3 filled with liquid, which is recorded as m7. When the battery to be tested is completely immersed in the liquid in the container 3, the second weighing device weighs the mass of the container 3, which is recorded as m8. The difference between m8 and m7 is the battery buoyancy F 浮 , then according to the buoyancy formula F 浮 =ρ 液 gV gives the volume V of the battery.

[0068] Of course, the configuration of the weighing mechanism in this application is not fixed and can be adjusted by those skilled in the art as needed. For example, the weighing mechanism may further include a second lifting mechanism, with the weighing platform 4 disposed at the output end of the second lifting mechanism. The weighing platform 4 can be moved in the first direction under the drive of the second lifting mechanism, which also facilitates adjustment of the distance between the battery under test and the container 3.

[0069] Those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims of this application, any of the claimed embodiments may be used in any combination.

[0070] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A battery volume testing device, characterized in that: include: a container and a supporting mechanism, wherein the container is used to contain a liquid; a lifting mechanism comprising at least two lifting members, wherein a first end of each lifting member is disposed on the supporting mechanism and a second end is used to connect to a battery to be tested, and a distance of each battery to be tested relative to the container in a first direction is adjustable so that the battery to be tested can be moved into and out of the container; A first weighing member is provided on the lifting member, and is used to weigh the mass of the battery to be tested and the mass of the battery to be tested after being completely placed in the liquid.

2. The battery volume testing device according to claim 1, characterized in that: The pulling mechanism further includes: A connecting plate or connecting rod is provided on the supporting mechanism, and the connecting plate or connecting rod is provided with the pulling member and is configured to drive the pulling member to rotate so that the battery to be tested on the pulling member can correspond to the container in the first direction.

3. The battery volume testing device according to claim 2, characterized in that: The pulling mechanism further includes: A first driving member is provided on the supporting mechanism, and an output end of the first driving member is connected to the connecting plate or the connecting rod, and is used for driving the connecting plate or the connecting rod to rotate.

4. The battery volume testing device according to claim 1, characterized in that: The battery volume testing device also includes: A weighing mechanism is provided with the container, and is used to weigh the mass of the container containing the liquid and the mass of the container when the battery to be tested is completely placed in the liquid.

5. The battery volume testing device according to claim 4, characterized in that: The weighing mechanism comprises: a weighing platform, on which the container is arranged; A second weighing member is provided on the weighing platform.

6. The battery volume testing device according to claim 5, characterized in that: The battery volume testing device also includes: A first lifting mechanism is provided with the weighing platform so that the container can be moved closer to or farther away from the battery to be tested.

7. The battery volume testing device according to claim 1, characterized in that: The supporting mechanism comprises: A support rod, the support rod being arranged along a first direction; A first connecting rod is arranged along a second direction, and a first end of the first connecting rod is connected to the support rod, and a second end of the first connecting rod is connected to the lifting member; the second direction is perpendicular to the first direction.

8. The battery volume testing device according to claim 7, characterized in that: The supporting mechanism comprises: A second connecting rod is arranged along the first direction, and a first end of the second connecting rod is connected to the second end of the first connecting rod, and a second end of the second connecting rod is connected to the lifting member.

9. The battery volume testing device according to claim 7, characterized in that: The second end of the first connecting rod is slidably disposed on the support rod, and the support mechanism further includes a second lifting mechanism, the output end of the second lifting mechanism being connected to the first connecting rod so as to drive the first connecting rod to move along the support rod in a first direction; The support rod is a telescopic rod.

10. The battery volume testing device according to claim 1, characterized in that: The battery volume testing device further comprises a box, which is arranged at the second end of the lifting member and is used to carry the battery to be tested, and the box is provided with a communication hole; or the battery volume testing device further comprises a tray, which is arranged at the second end of the lifting member and is used to place the battery to be tested, and the tray is provided with a communication hole; and / or When the lifting member is a lifting rope, the battery volume testing device also includes a second driving member arranged on the supporting mechanism and a reel pivotally connected to the second driving member, the first end of the lifting rope is fixed on the reel, and the second end is connected to the battery to be tested; or when the lifting member is a lifting rod, the lifting rod is a telescopic rod.

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