Test equipment and battery detection system

Abstract

The utility model discloses test equipment and a battery detection system. The test equipment comprises a base, a movable plate, a grating measurement assembly and a controller, wherein the base is used for supporting a to-be-tested battery; the movable plate is parallel to the base and is movably arranged with the base at an interval, and the movable plate can approach the base according to a control signal so as to abut against the to-be-tested battery and apply specified pressure to the to-be-tested battery; a measuring head of the grating measuring assembly is connected with the movable plate so as to measure and display the thickness of the battery to be measured according to the movement distance of the movable plate; and the controller is in signal connection with charging and discharging test equipment so as to generate the control signal according to a measurement signal of the charging and discharging test equipment, so that the movable plate is controlled to be close to or far away from the base.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a testing device and a battery testing system. Background Art

[0002] Soft-pack lithium batteries will expand due to electrochemical changes during the charging and discharging process. For devices that use soft-pack lithium batteries, such as laptops, the expansion thickness of the soft-pack lithium batteries needs to meet the thickness requirements of the equipment and also comply with relevant standards. Therefore, soft-pack lithium batteries need to undergo repeated charge and discharge tests before leaving the factory to test their service life, and at the same time, the battery expansion thickness test must be performed.

[0003] However, existing thickness testing equipment cannot guarantee the free expansion of the battery, resulting in deviations in the test results. Utility Model Content

[0004] The embodiments of the present application provide a testing device and a battery testing system.

[0005] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0006] The first aspect of the present application provides a testing device, which comprises

[0007] A base, the base being used to support the battery to be tested;

[0008] A movable plate, the movable plate is movably arranged parallel to the base and spaced therefrom, and the movable plate can approach the base according to a control signal to contact the battery to be tested and apply a specified pressure to the battery to be tested;

[0009] A grating measurement component, wherein a measuring head of the grating measurement component is connected to the movable plate so as to be able to measure and display the thickness of the battery to be measured according to the movement distance of the movable plate;

[0010] The controller is connected to the charge and discharge test device signal to generate the control signal according to the measurement signal of the charge and discharge test device to control the movable plate to approach or move away from the base.

[0011] In some modified implementations of the first aspect of the present application, the aforementioned testing device further includes a driving unit:

[0012] The driving part is connected to the movable plate to drive the movable plate to move closer to or away from the base;

[0013] The controller is electrically connected to the driving part to control the movable plate to approach or move away from the base according to the control signal.

[0014] In some modified implementations of the first aspect of the present application, in the aforementioned testing device, the driving unit includes a driving motor and a connecting member;

[0015] One end of the connecting member is wound around the output shaft of the driving motor, and the other end is connected to the movable plate.

[0016] In some modified implementations of the first aspect of the present application, the aforementioned test device, wherein the grating measurement assembly includes a measuring piece, a scale grating, and a grating reading head;

[0017] The grating reading head is fixedly arranged on a side of the movable plate away from the base;

[0018] The measuring member extends along a first direction and is connected to the movable plate so as to move closer to or farther away from the base as the movable plate moves toward the base; the first direction is the direction in which the movable plate points toward the base;

[0019] The scale grating is arranged on the measuring piece, and the scale grating is connected with the grating reading head signal.

[0020] In some modified implementations of the first aspect of the present application, the aforementioned test device, wherein the grating measurement assembly includes a first measuring member, a scale grating, a grating reading head, an amplifying transmission structure and a second measuring member;

[0021] The grating reading head is fixedly arranged on a side of the movable plate away from the base;

[0022] The first measuring member extends along a first direction and is connected to the movable plate so as to move closer to or farther away from the base as the movable plate moves toward the base; the first direction is the direction in which the movable plate points toward the base;

[0023] The second measuring member is movably connected to the first measuring member through the amplifying transmission structure, so that the second measuring member can move towards the first measuring member in a first direction;

[0024] The scale grating is arranged on the second measuring member, and the scale grating is connected to the grating reading head signal.

[0025] In some modified implementations of the first aspect of the present application, in the aforementioned testing device, the first measuring member and the second measuring member are both racks;

[0026] The amplifying transmission structure comprises a first gear and a second gear;

[0027] The first gear and the second gear are coaxial and spaced apart along the axial direction, and the radius of the first gear is smaller than the radius of the second gear;

[0028] Wherein, the first measuring member is meshed with the first gear, and the second measuring member is meshed with the second gear.

[0029] In some modified implementations of the first aspect of the present application, the aforementioned testing device further includes at least three guide pillars;

[0030] At least three guide posts are arranged on the base at intervals along a non-linear direction, and the movable plate is movably sleeved on at least the three guide posts.

[0031] In some modified implementations of the first aspect of the present application, in the aforementioned testing equipment, the grating measurement component and / or the controller are arranged on the top of any one of the guide columns.

[0032] In some modified implementations of the first aspect of the present application, the aforementioned testing device further includes a plurality of load-bearing members;

[0033] The weights of the plurality of load-bearing members are the same or different, and the load-bearing members are used to be movably arranged on the movable plate, so that the movable plate can apply a specified pressure to the battery to be tested.

[0034] A second aspect of the present application provides a battery detection system, which includes the aforementioned test device and a charge and discharge test device, wherein the charge and discharge test device is signal-connected to a controller of the test device to send a measurement signal to the controller.

[0035] Compared with the prior art, the test equipment provided by the present application controls the movable plate to flexibly approach the base through a controller to ensure the free expansion of the battery to be tested during the charging and discharging process, thereby preventing the movable plate from being pressed on the battery to be tested for a long time and affecting the accuracy of the test results; at the same time, through the setting of the grating measurement component, the thickness measurement data can be obtained quickly and directly, greatly improving the test efficiency; thereby solving the problem that the existing thickness testing equipment cannot ensure the free expansion of the battery, resulting in deviations in the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0037] Figure 1 A schematic diagram of the structure of a testing device is shown schematically;

[0038] Figure 2 The structure diagram of a grating measurement component in a test device is schematically shown;

[0039] Figure 3The schematic diagram shows the structural coordination between the movable plate and the base in a testing device;

[0040] Figure 4 A structural block diagram of a test device is schematically shown;

[0041] Explanation of the accompanying drawings: base 1, movable plate 2, grating measurement assembly 3, grating reading head 31, first measuring piece 32, scale grating 33, amplifying transmission structure 34, first gear 341, second gear 342, second measuring piece 35, controller 4, driving unit 5, driving motor 51, connecting piece 52, guide column 6, first direction a. DETAILED DESCRIPTION

[0042] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0043] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0044] The technical solution of the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0045] Example 1

[0046] Reference Figure 1 and attached Figure 4 The test device provided in the embodiment of the present application includes a base 1, a movable plate 2, a grating measurement component 3 and a controller 4, wherein the base 1 is used to support a battery to be tested (not shown in the figure); the movable plate 2 is movably arranged parallel to the base 1 and spaced therefrom, and the movable plate 2 can approach the base 1 according to a control signal to contact the battery to be tested and apply a specified pressure to the battery to be tested; the measuring head of the grating measurement component 3 is connected to the movable plate 2 so as to measure and display the thickness of the battery to be tested according to the movement distance of the movable plate 2; the controller 4 is connected to a charge and discharge test device (not shown in the figure) by signal to generate the control signal according to the measurement signal of the charge and discharge test device to control the movable plate 2 to approach or move away from the base 1.

[0047] Specifically, in order to solve the problem that the existing thickness testing equipment cannot ensure the free expansion of the battery, resulting in deviations in the test results, the present embodiment provides a test equipment for measuring the thickness of the battery, which realizes flexible control of the movable plate 2 through the setting of the controller 4, realizes the normally open state of the movable plate 2, and avoids the movable part 2 being pressed on the battery to be tested for a long time to affect the free expansion of the battery to be tested and the final test results; at the same time, it cooperates with the grating measurement component 3 to accurately obtain the thickness data of the battery to be tested, thereby ensuring the accuracy of the test results.

[0048] The base 1 is a rigid structure, which may be a plate, table, frame, etc., as long as it can provide stable support for the battery to be tested (not shown in the figure). The base 1 may have a designated supporting surface, supporting area or limiting area to ensure that the battery to be tested is stably placed thereon.

[0049] Among them, the movable plate 2 is a rigid plate body, which can provide a specified pressure for the battery to be tested. During the charging and discharging process of the battery, expansion will occur due to electrochemical reactions, especially soft-pack lithium-ion batteries. When designing the battery, repeated charging and discharging tests will be performed to calculate the battery life, and thickness measurement is required during the charging and discharging process of the battery to ensure that the battery meets the overall thickness and spatial layout requirements of the electronic device during use; in this field, it is usually necessary to apply a pressure of 400g-1000g to the battery to be tested during the thickness test, and a pressure of 500g is used for the battery of a laptop computer. The movable plate 2 provided in this embodiment can adjust its own gravity according to the actual pressure requirements to achieve a specified pressure that meets industry standards. In this embodiment, the movable plate 2 is in a normally open state, that is, during the charging and discharging process of the battery to be tested, the movable plate 2 is always set apart from the base 1. When a thickness test is required, the movable plate 2 is controlled to be close to the base 1 and pressed on the battery to be tested to apply a specified pressure that meets industry standards to the battery to be tested. In this embodiment, the movable setting of the movable plate 2 relative to the base 1 can be achieved by a driving unit 5. The driving unit 5 can be but is not limited to a driving structure such as a motor, a cylinder, or a screw. In this embodiment, the driving unit 5 is connected to the movable plate 2 to drive the movable plate 2 to approach or move away from the base 1; the controller 4 is electrically connected to the driving unit 5 to control the movable plate 2 to approach or move away from the base 1 according to the control signal.

[0050] Among them, the grating measurement component 3 is a sensor-type device that uses the grating fringe principle to measure displacement. In this embodiment, the simplest grating measuring instrument can be used, or a more accurate and easier to observe grating measuring instrument can be set according to actual needs. For example, an amplification design structure is added to make the detection data easy to observe and effectively ensure accuracy.

[0051] Among them, the controller 4 is a PLC controller capable of receiving and sending data, analyzing, comparing and editing programs. In this embodiment, the controller 4 is connected to the charging and discharging device (not shown in the figure) by signal, which can be but not limited to wired connection and wireless signal connection. In this embodiment, through the setting of the controller 4, the battery to be tested can be tested for charging and discharging on the base 1. It is sufficient to ensure that the battery to be tested is electrically connected to the charging and discharging device, so that the charging and discharging device can obtain the charging and discharging state and service life related data of the battery to be tested. The path is not blocked. At the same time, the controller 4 can interact with the charging and discharging device to obtain the measurement signal sent by the charging and discharging device. For example, the charging and discharging device forms a measurement signal according to the time, number of cycles, capacity and other conditions during the charging and discharging test, that is, notifies the controller 4 that a thickness test is required. Then, the controller 4 can generate a control signal for the movable plate 2 and the grating measurement component according to the measurement signal, and control the movable plate 2 to approach the base 1 to complete the downward pressure and the acquisition of thickness data; of course, the measurement signal can also be sent directly to the controller 4 manually.

[0052] According to the above, the test equipment provided by the present application controls the movable plate 2 through the controller 4 to flexibly approach the base 1 to ensure the free expansion of the battery to be tested during the charging and discharging process, thereby preventing the movable plate 2 from being pressed on the battery to be tested for a long time and affecting the accuracy of the test results; at the same time, through the setting of the grating measurement component 3, the thickness measurement data can be obtained quickly and directly, greatly improving the test efficiency; thereby solving the problem that the existing thickness testing equipment cannot ensure the free expansion of the battery, resulting in deviations in the test results.

[0053] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B, which is specifically understood as: A and B may be included at the same time, A may exist alone, or B may exist alone, and any of the above three situations may exist.

[0054] Further, see Attachment Figure 1 and attached Figure 4 In the test equipment provided in this embodiment, in a specific implementation, the driving part 5 includes a driving motor 51 and a connecting member 52; one end of the connecting member 52 is wound around the output shaft of the driving motor 51, and the other end is connected to the movable plate 2.

[0055] Specifically, in order to realize the movable setting of the movable plate 2, the driving part 5 is set to include a driving motor 1 and a connecting member 52 in this embodiment. The driving motor 1 can be easily understood by those skilled in the art and will not be described in detail here. The connecting member 52 is a flexible structure, which can be but not limited to a rope body. One end of the rope body is connected to the output shaft of the driving motor 51, and the distance between the movable plate 2 and the base 1 can be adjusted by winding or disengaging the output shaft. The number of connecting members 52 in this embodiment can be designed and adjusted according to actual needs. For example, a number of connecting members 52 are evenly distributed around the movable plate 2, and are concentrated upward into a whole connected to the output shaft of the driving motor to ensure the stability of the rising and falling process of the movable plate 2. In the specific control process, the control signal of the controller 4 for the driving motor 51 can be set according to experiments or even experience, so that the driving motor 51 stops after rotating a specified number of times. The specified number of times needs to ensure that the movable plate 2 can be pressed on the battery to be tested.

[0056] Furthermore, in the specific implementation of the test equipment provided in this embodiment, the grating measurement component 3 includes a measuring piece (not shown in the figure), a scale grating (not shown in the figure) and a grating reading head 31; the grating reading head 31 is fixedly arranged on the side of the movable plate 2 away from the base 1; the measuring piece extends along a first direction a and is connected to the movable plate 2 to approach or move away from the base 1 as the movable plate 2 approaches; the first direction a is the direction in which the movable plate 2 points to the base 1; the scale grating is arranged on the measuring piece, and the scale grating is signal-connected to the grating reading head 31.

[0057] Specifically, in order to test the thickness of the battery to be tested, the grating measurement component is set in this embodiment to include a measuring piece (not shown in the figure), a scale grating (not shown in the figure) and a grating reading head 31. The grating measurement component under this setting can be easily understood by those skilled in the art. The measuring piece and the scale grating can move away from or close to the grating reading head 31 under the drive of the movable plate 2. In this process, the grating reading head 31 and the scale grating can cooperate to generate displacement readings and; it can be understood that the maximum distance between the movable plate 2 and the substrate 1 is known, and the controller 4 can be set to be the zero position when the movable plate 2 is at the highest point. When the movable plate 2 drops to the point where it contacts the battery to be tested and cannot continue to drop, the controller 4 can calculate the thickness of the battery to be tested; on the contrary, the controller 4 can be set to be the zero position when the movable plate 2 is attached to the base 1. After the movable plate 2 rises to the highest point and drops again, the controller 4 calculates the thickness of the battery to be tested; the above content can be easily understood and implemented by those skilled in the art, and no further elaboration is made here. The grating reading head 31 can be kept fixed by a bracket or a column.

[0058] Further, see Attachment Figure 2In the test equipment provided in this embodiment, in a specific implementation, the grating measurement component 3 includes a first measuring piece 32, a scale grating 33, a grating reading head 31, an amplifying transmission structure 34 and a second measuring piece 35; the grating reading head 31 is fixedly arranged on the side of the movable plate 2 away from the base 1; the first measuring piece 32 extends along a first direction a and is connected to the movable plate 2 to approach or move away from the base 1 as the movable plate 2 approaches; the first direction a is the direction in which the movable plate 2 points to the base 1; the second measuring piece 35 is movably connected to the first measuring piece 32 through the amplifying transmission structure 34, so that the second measuring piece 35 can move towards the first measuring piece 32 in the first direction a; the scale grating 33 is arranged on the second measuring piece 35, and the scale grating 33 is signal-connected to the grating reading head 31.

[0059] Specifically, in order to amplify the data display, an amplifying transmission structure 34 is set in the grating measurement component 3 in this embodiment. The first measuring piece 32 and the second measuring piece 35 can amplify the displacement of the movable plate 2 under the action of the amplifying transmission structure 34, thereby also amplifying the data of the thickness of the battery to be tested. For the overall test operation, the test cycle can be effectively shortened and unnecessary operation interference can be eliminated. Accordingly, the first measuring piece 32 is a rigid structure, which moves in the same direction as the movable plate 2 to directly obtain the movement displacement of the movable plate 2. The second measuring piece 35 transmits the amplified data to the grating reading head 31 through the amplifying transmission structure 34 for display and transmits it to the controller 4 for storage or analysis.

[0060] Further, see Attachment Figure 2 In the test equipment provided in this embodiment, in a specific implementation, the first measuring piece 32 and the second measuring piece 35 are both racks; the amplifying transmission structure 34 includes a first gear 341 and a second gear 342; the first gear 341 and the second gear 342 are coaxial and spaced apart along the axial direction, and the radius of the first gear 341 is smaller than the radius of the second gear 342; wherein the first measuring piece 32 is meshed with the first gear 341, and the second measuring piece 35 is meshed with the second gear 342.

[0061] Specifically, in order to realize the relative movement of the first measuring piece 32 and the second measuring piece 35 and to be able to amplify them, in the present embodiment, the two measuring pieces are both arranged in the form of racks, and a first gear 341 with a smaller radius and a second gear 342 with a larger radius are arranged correspondingly. The first gear 341 and the second gear 342 are coaxial but have different radii and different tooth spacings. Therefore, under the same rotation speed, the straight-line distances generated by the first gear 341 and the second gear 342 are different. Therefore, in the present embodiment, the first measuring piece 32 is used in conjunction with the first gear 341 to directly obtain the displacement of the movable plate 2, and then the displacement is amplified by the second gear 342 and the second measuring piece 35 and displayed on the grating reading head 31 through the scale grating 33.

[0062] Further, see Attachment Figure 3 The test device provided in this embodiment, in a specific implementation, further includes at least three guide columns 6; at least three of the guide columns 6 are arranged on the base 1 at intervals along a non-linear direction, and the movable plate 2 is movably connected to at least the three guide columns 6.

[0063] Specifically, in order to ensure the stable movement of the movable plate 2, a guide column 6 is provided in this embodiment. The guide column 6 is a rigid column, which can be, but is not limited to, a cylindrical or prism structure. In this embodiment, the number of guide columns 6 is at least three, and the three should be arranged in a non-linear direction to ensure the stability of the movable plate 2 and avoid deflection. Preferably, the arrangement is formed in an equilateral triangle; the guide column 6 can also guide the movement of the movable plate 2. Furthermore, the grating measurement component 3 and / or the controller 4 are arranged on the top of any of the guide columns 6 to achieve a fixed and stable setting.

[0064] Furthermore, the testing equipment provided in this embodiment, in a specific implementation, also includes a plurality of load-bearing members (not shown in the figure); the weights of the plurality of load-bearing members are the same or different, and the load-bearing members are used to be movably arranged on the movable plate 2 so that the movable plate 2 can apply a specified pressure to the battery to be tested.

[0065] Specifically, due to design tolerances, a certain deviation is unavoidable in the weight of the movable plate 2, and thus a number of load-bearing members are provided in the present embodiment, which may be but are not limited to weights, so that the movable plate 2 can cooperate with the downward force required by the industry standards; the load-bearing members and the movable plate 2 can be directly placed on the movable plate 2, or a receiving groove can be provided on the movable plate 2 to accommodate the load-bearing members.

[0066] Example 2

[0067] This embodiment provides a battery detection system, which includes the test device and a charge and discharge test device. The charge and discharge test device is signal-connected to a controller 4 of the test device to send a measurement signal to the controller 4 .

[0068] Specifically, the test device is the test device described in Example 1. For its structure and working principle, please refer to the detailed description of Example 1, and no further details will be given here.

[0069] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A testing device, characterized in that: It includes: A base, the base being used to support the battery to be tested; A movable plate, the movable plate is movably arranged parallel to the base and spaced therefrom, and the movable plate can approach the base according to a control signal to contact the battery to be tested and apply a specified pressure to the battery to be tested; A grating measurement component, wherein a measuring head of the grating measurement component is connected to the movable plate so as to be able to measure and display the thickness of the battery to be measured according to the movement distance of the movable plate; The controller is connected to the charge and discharge test device signal to generate the control signal according to the measurement signal of the charge and discharge test device to control the movable plate to approach or move away from the base.

2. The test device according to claim 1, characterized in that: Also includes the drive unit: The driving part is connected to the movable plate to drive the movable plate to move closer to or away from the base; The controller is electrically connected to the driving part to control the movable plate to approach or move away from the base according to the control signal.

3. The testing device according to claim 2, characterized in that: The driving part includes a driving motor and a connecting piece; One end of the connecting member is wound around the output shaft of the driving motor, and the other end is connected to the movable plate.

4. The testing device according to claim 1, characterized in that: The grating measurement component includes a measuring piece, a scale grating and a grating reading head; The grating reading head is fixedly arranged on a side of the movable plate away from the base; The measuring member extends along a first direction and is connected to the movable plate so as to move closer to or farther away from the base as the movable plate moves toward the base; the first direction is the direction in which the movable plate points toward the base; The scale grating is arranged on the measuring piece, and the scale grating is connected with the grating reading head signal.

5. The testing device according to claim 1, characterized in that: The grating measurement assembly includes a first measuring piece, a scale grating, a grating reading head, an amplifying transmission structure and a second measuring piece; The grating reading head is fixedly arranged on a side of the movable plate away from the base; The first measuring member extends along a first direction and is connected to the movable plate so as to move closer to or farther away from the base as the movable plate moves toward the base; the first direction is the direction in which the movable plate points toward the base; The second measuring member is movably connected to the first measuring member through the amplifying transmission structure, so that the second measuring member can move towards the first measuring member in a first direction; The scale grating is arranged on the second measuring member, and the scale grating is connected to the grating reading head signal.

6. The testing device according to claim 5, characterized in that: The first measuring member and the second measuring member are both racks; The amplifying transmission structure comprises a first gear and a second gear; The first gear and the second gear are coaxial and spaced apart along the axial direction, and the radius of the first gear is smaller than the radius of the second gear; Wherein, the first measuring member is meshed with the first gear, and the second measuring member is meshed with the second gear.

7. The testing device according to claim 1, characterized in that: Also included are at least three guide posts; At least three guide posts are arranged on the base at intervals along a non-linear direction, and the movable plate is movably sleeved on at least the three guide posts.

8. The testing device according to claim 7, characterized in that: The grating measurement component and / or the controller are arranged on the top of any one of the guide pillars.

9. The testing device according to claim 1, characterized in that: Also included are several load-bearing pieces; The weights of the plurality of load-bearing members are the same or different, and the load-bearing members are used to be movably arranged on the movable plate, so that the movable plate can apply a specified pressure to the battery to be tested.

10. A battery detection system, characterized in that: It includes: The testing device according to any one of claims 1 to 9; A charge and discharge test device is connected to the controller of the test device by signal so as to send a measurement signal to the controller.

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