Battery edge voltage detection device and detection system

Abstract

The utility model relates to the field of detection devices, in particular to a battery edge voltage detection device and system. The battery edge voltage detection device comprises a detection platform, a pressing mechanism and a detection mechanism. The detection platform is used for positioning the battery; the pressing mechanism is arranged opposite to the detection platform so as to apply pressure to the battery; the detection platform can translate on a horizontal plane, so that the battery is right opposite to the pressure applying part of the pressing mechanism; the detection mechanism comprises a positive electrode detection assembly and a negative electrode detection assembly; the positive electrode detection assembly is opposite to the positive electrode side of the battery so as to detect the voltage between the positive electrode post of the battery and the shell of the battery; the negative electrode detection assembly is opposite to the negative electrode side of the battery so as to detect the voltage between the negative electrode post of the battery and the shell of the battery. According to the battery edge voltage detection device provided by the invention, the edge voltage of the battery can be detected, and the downward pressing mechanism is utilized to apply pressure to the battery before detection, so that the battery shell is in close contact with the battery core, and the detection rate of the battery of which the negative electrode is in virtual contact with the shell can be improved.

Description

Technical Field

[0001] The present application relates to the field of detection devices, and more particularly to a battery edge voltage detection device and a detection system. Background Art

[0002] Lithium-ion batteries with aluminum metal casings have advantages such as good heat dissipation performance and high mechanical strength. Inside the battery, due to the possible direct contact between the negative electrode of the battery cell and the metal casing during the production process, an edge voltage is formed, which may damage the original passivation film under certain conditions, leading to battery corrosion, leakage, or even failure. Utility Model Content

[0003] The purpose of the present application is to provide a battery edge voltage detection device and a detection system that can detect the edge voltage of the battery and improve the detection rate of defective batteries.

[0004] The present application provides a battery edge voltage detection device, including a detection platform, a pressing mechanism, and a detection mechanism;

[0005] The detection platform is used for positioning the battery; the pressing mechanism is arranged opposite to the detection platform to apply pressure to the battery; the detection platform can translate on a horizontal plane so that the battery is directly opposite to the pressing part of the pressing mechanism.

[0006] The detection mechanism includes a positive electrode detection component and a negative electrode detection component; the positive electrode detection component is opposite to the positive electrode side of the battery to detect the voltage between the positive electrode terminal of the battery and the battery casing; the negative electrode detection component is opposite to the negative electrode side of the battery to detect the voltage between the negative electrode terminal of the battery and the battery casing.

[0007] In the above technical solution, further, both the positive electrode detection component and the negative electrode detection component are provided with visual detection probes to distinguish the positive electrode terminal and the negative electrode terminal.

[0008] In the above technical solution, further, the visual detection probe is a color code sensor, and the color code sensor is used to detect the injection molded part color of the positive electrode terminal and the injection molded part color of the negative electrode terminal.

[0009] In the above technical solution, further, the positive electrode detection component includes a positive electrode driving device and a positive electrode detection head; the driving end of the positive electrode driving device is connected to the positive electrode detection head to drive the positive electrode detection head to approach or move away from the positive electrode side of the battery;

[0010] The negative electrode detection component includes a negative electrode driving device and a negative electrode detection head; the driving end of the negative electrode driving device is connected to the negative electrode detection head to drive the negative electrode detection head to approach or move away from the negative electrode side of the battery.

[0011] In the above technical solution, further, the positive electrode detection head includes a positive electrode voltage probe, and the positive electrode voltage probe is used for electrically connecting with the positive electrode post;

[0012] The negative electrode detection head includes a negative electrode voltage probe and a housing voltage probe. The negative electrode voltage probe is used for electrically connecting with the negative electrode post, and the housing voltage probe is used for electrically connecting with the housing exposed at the opening of the battery patch.

[0013] In the above technical solution, further, the detection platform includes a translation driving device, a guiding component and a positioning table;

[0014] The positioning table is used for positioning the battery; the positioning table is connected with the guiding component, and the driving end of the translation driving device is connected with the positioning table to drive the positioning table to reciprocate along the guiding direction of the guiding component.

[0015] In the above technical solution, further, the positioning table includes a bearing plate and a plurality of positioning blocks;

[0016] The driving end of the translation driving device is connected with the bearing plate, and the bearing plate is used for supporting the battery; the plurality of positioning blocks are installed on the bearing surface of the bearing plate to respectively position the two sides in the length direction and the two sides in the width direction of the battery.

[0017] In the above technical solution, further, the pressing mechanism includes a pressing driving device and a pressing plate;

[0018] The driving end of the pressing driving device is connected with the pressing plate to press the preset surface of the battery. The long side and the wide side of the battery enclose to form the preset surface;

[0019] The pressing range of the pressing plate is smaller than the extending range of the preset surface, so as to leave an un-pressed area in the circumferential direction of the preset surface.

[0020] In the above technical solution, further, a protective cover is further included;

[0021] The protective cover includes a bottom plate and a cover body. The cover body is buckled on the bottom plate to enclose and form an accommodating space;

[0022] The detection platform is installed on the bottom plate, and the pressing mechanism and the detection mechanism are installed on the cover body; a guiding member is arranged between the pressing mechanism and the cover body to guide the pressing movement of the pressing mechanism.

[0023] This application further provides a detection system, including the battery edge voltage detection device described in the above solution.

[0024] Compared with the prior art, the beneficial effects of the present application are as follows:

[0025] The battery edge voltage detection device provided by the present application detects the edge voltage of the battery through a detection mechanism. Before detection, the battery is pressurized by a pressing mechanism to make the battery case in close contact with the battery cell, which can improve the detection rate of batteries with virtual contact between the negative electrode and the case. Moreover, the device parts have a simple structure, the materials are easy to obtain, and the cost of the parts is low, which can effectively reduce the production cost.

[0026] The present application also provides a detection system, including the battery edge voltage detection device described in the above solution. Based on the above analysis, it can be seen that the detection system also has the above beneficial effects and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is the first structural schematic diagram of the battery edge voltage detection device provided by the present application;

[0029] Figure 2 It is the second structural schematic diagram of the battery edge voltage detection device provided by the present application;

[0030] Figure 3 It is the first structural schematic diagram of the detection mechanism provided by the present application;

[0031] Figure 4 It is the second structural schematic diagram of the detection mechanism provided by the present application.

[0032] In the figure: 101 - detection platform; 102 - pressing mechanism; 103 - positive electrode detection component; 104 - negative electrode detection component; 105 - battery; 106 - vision detection probe; 107 - positive electrode driving device; 108 - positive electrode detection head; 109 - negative electrode driving device; 110 - negative electrode detection head; 111 - positive electrode voltage probe; 112 - negative electrode voltage probe; 113 - case voltage probe; 114 - translation driving device; 115 - guiding component; 116 - positioning table; 117 - connecting block; 118 - bearing plate; 119 - positioning block; 120 - pressing driving device; 121 - pressing plate; 122 - protective cover; 123 - bottom plate; 124 - cover body; 125 - window; 126 - guiding rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative work shall fall within the protection scope of the present application.

[0034] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0036] Embodiment 1

[0037] During the manufacturing process of a lithium-ion battery, the aluminum shell is weakly conducted with the positive electrode terminal, causing the shell to be positively charged. Conventionally, it is considered that a battery with a voltage between the positive electrode and the shell ≤ 0.3V is a qualified battery. The generation of the battery edge voltage is generally due to the contact between the negative electrode and the shell inside the battery, reducing the voltage between the negative electrode and the shell, and at the same time raising the voltage between the positive electrode and the shell. When the voltage between the positive electrode and the shell reaches the lithium intercalation potential of aluminum, corrosion may occur, resulting in liquid leakage. Therefore, the battery edge voltage detection device provided in the present application mainly judges whether the battery generates edge voltage by detecting the voltages between the positive electrode and the shell, and between the negative electrode and the shell, and sets the abnormal battery selection criteria.

[0038] See Figures 1 to 4 As shown, the battery edge voltage detection device provided in the present application includes a detection platform 101, a pressing mechanism 102, and a detection mechanism.

[0039] As Figure 1 and Figure 2As shown in the figure, when detecting the battery 105, the battery 105 is placed on the detection platform 101, and the detection platform 101 can be used to position the battery 105. The pressing mechanism 102 is located above the detection platform 101 and is arranged opposite to the detection platform 101 to apply pressure to the battery 105. The pressing mechanism 102 compacts the battery 105 so that the battery case is in close contact with the battery cell, which can improve the detection rate of batteries with loose contact between the negative electrode and the case. Before detection, the detection platform 101 can translate on the horizontal plane to move the position of the battery 105 so that the battery 105 is directly opposite to the pressing part of the pressing mechanism 102 to ensure the accuracy of the pressing position of the pressing mechanism 102 on the battery 105.

[0040] Specifically, the detection mechanism includes a positive electrode detection component 103 and a negative electrode detection component 104. The positive electrode detection component 103 is opposite to the positive electrode side of the battery 105 to detect the voltage between the positive electrode terminal of the battery 105 and the case of the battery 105; the negative electrode detection component 104 is opposite to the negative electrode side of the battery 105 to detect the voltage between the negative electrode terminal of the battery 105 and the case of the battery 105. By detecting the above two voltage values by the detection mechanism, it can be determined whether the battery 105 generates side voltage.

[0041] In an optional solution of this embodiment, both the positive electrode detection component 103 and the negative electrode detection component 104 are provided with visual detection probes 106 to distinguish the positive electrode terminal and the negative electrode terminal, so as to avoid mismeasurement caused by the reverse placement of the positive and negative directions of the battery 105, and further misjudgment of the detection result.

[0042] Specifically, the visual detection probe 106 is a color mark sensor, and the color mark sensor is used to detect the injection molded part colors of the positive electrode terminal and the negative electrode terminal, so as to distinguish the positive electrode terminal and the negative electrode terminal. Generally, the positive electrode terminal is provided with a black injection molded part, and the negative electrode terminal is provided with an off-white injection molded part. The color mark sensor can respectively detect the color information of the injection molded parts of the positive electrode terminal and the negative electrode terminal, convert the color information into an electrical signal, and transmit the electrical signal to the device program to control the device to alarm, playing a role in preventing misloading of the battery 105. Of course, for the injection molded parts of the positive electrode terminal and the negative electrode terminal of other colors, the color mark sensor is also selected correspondingly to identify the corresponding color information.

[0043] In an alternative solution of this embodiment, the positive electrode detection component 103 includes a positive electrode driving device 107 and a positive electrode detection head 108; the positive electrode driving device 107 is specifically a cylinder, and the driving end of the positive electrode driving device 107 is connected to the positive electrode detection head 108 to drive the positive electrode detection head 108 to approach or move away from the positive electrode side of the battery 105; the negative electrode detection component 104 includes a negative electrode driving device 109 and a negative electrode detection head 110; the negative electrode driving device 109 is specifically a cylinder, and the driving end of the negative electrode driving device 109 is connected to the negative electrode detection head 110 to drive the negative electrode detection head 110 to approach or move away from the negative electrode side of the battery 105.

[0044] In this embodiment, before the detection step of the battery 105, the detection platform 101 needs to align the battery 105, and the pressing mechanism 102 needs to apply pressure to the battery 105. In the above two steps, the positive electrode driving device 107 drives the positive electrode detection head 108 away from the positive electrode side of the battery 105, and the negative electrode driving device 109 drives the negative electrode detection head 110 away from the negative electrode side of the battery 105, which can avoid the positive electrode detection head 108 and the negative electrode detection head 110 from colliding with the battery 105. Only in the detection step, the positive electrode driving device 107 drives the positive electrode detection head 108 to approach the positive electrode side of the battery 105, and the negative electrode driving device 109 drives the negative electrode detection head 110 away from the negative electrode side of the battery 105 to achieve the purpose of voltage detection.

[0045] In an alternative solution of this embodiment, as Figure 3 and Figure 4 shown, the positive electrode detection head 108 includes a positive electrode voltage probe 111, and the positive electrode voltage probe 111 faces the positive electrode post. When the positive electrode driving device 107 drives the positive electrode detection head 108 to approach the positive electrode side of the battery 105, the positive electrode voltage probe 111 can contact the positive electrode post to achieve electrical connection with the positive electrode post.

[0046] The negative electrode detection head 110 includes a negative electrode voltage probe 112 and a housing voltage probe 113. Among them, the negative electrode voltage probe 112 faces the negative electrode post. When the negative electrode driving device 109 drives the negative electrode detection head 110 to approach the negative electrode side of the battery 105, the negative electrode voltage probe 112 can contact the negative electrode post to achieve electrical connection with the negative electrode post.

[0047] In addition, since the positive electrode side end face and the negative electrode side end face of the battery 105 are both covered with patches. Except for the exposed positive electrode terminal post, the rest of the cover plate area is covered by the patch. However, the patch on the negative electrode side of the battery 105 is provided with a 10mm×10mm opening in addition to the exposed negative electrode terminal post, and a steel code label is provided on the housing exposed at the opening position. Therefore, in this application, the housing voltage probe 113 is arranged at the negative electrode detection head 110, and the housing voltage probe 113 is opposite to the opening of the patch of the battery 105. When the negative electrode driving device 109 drives the negative electrode detection head 110 to approach the negative electrode side of the battery 105, the voltage probe can contact the housing exposed at the opening to achieve electrical connection with the housing.

[0048] Both the positive electrode detection head 108 and the negative electrode detection head 110 are electrically connected to the detection module of the device, so that the voltage between the positive electrode terminal post and the housing of the battery 105 and the voltage between the negative electrode terminal post and the housing of the battery 105 can be detected, thereby detecting the edge voltage of the battery 105.

[0049] It should be noted that the color sensor provided on the negative electrode side can not only identify the color information of the negative electrode terminal post injection molding, but also identify the color information of the housing at the opening. When the positive and negative electrodes of the battery 105 are placed wrongly, the color sensor cannot detect the aluminum shell, and the color information of the terminal post injection molding is incorrect. The two detection information are both judged unqualified, realizing double alarm for the problem of wrongly placed battery 105.

[0050] In an optional solution of this embodiment, the detection platform 101 includes a translation driving device 114, a guiding component 115 and a positioning table 116; the positioning table 116 is used for positioning the battery 105; the positioning table 116 is connected to the guiding component 115, and the driving end of the translation driving device 114 is connected to the positioning table 116 to drive the positioning table 116 to reciprocate along the guiding direction of the guiding component 115.

[0051] In this embodiment, specifically as Figure 1 and Figure 2 shown, both the translation driving device 114 and the guiding component 115 are located at the bottom of the positioning table 116. A connecting block 117 is provided at the bottom of the positioning table 116, and the driving end of the translation driving device 114 is connected to the connecting block 117. The guiding component 115 includes a slide rail and a slider. The slider is slidably installed on the slide rail and is connected to the bottom of the positioning table 116. The guiding component 115 can guide the movement of the positioning table 116, so that the movement process of the positioning table 116 is more stable and the movement position is more accurate.

[0052] When testing the battery 105, the battery 105 needs to be placed on the positioning platform 116. At this time, the translation drive device 114 drives the positioning platform 116 to move so that the positioning platform 116 moves out of the coverage of the pressing mechanism 102, providing a larger space for the operation of placing the battery 105, so as to facilitate the placement of the battery 105 on the positioning platform 116. After the battery 105 is placed on the positioning platform 116, the translation drive device 114 drives the positioning platform 116 to move within the pressure range of the pressing mechanism 102, and the positive side and the negative side of the battery 105 can also be opposite to the positive detection head 108 and the negative detection head 110 respectively.

[0053] More specifically, the positioning platform 116 includes a supporting plate 118 and a plurality of positioning blocks 119, and a connecting block 117 connected to the translation driving device 114 is connected to the bottom of the supporting plate 118. The top surface of the supporting plate 118 is a supporting surface for supporting the battery 105, and a plurality of positioning blocks 119 are installed on the supporting surface of the supporting plate 118 to respectively position the two sides in the length direction and the two sides in the width direction of the battery 105, so as to correct the relative position of the battery 105, the pressing mechanism 102, and the detection probe, and prevent the battery 105 from shifting during the process of being pressed by the pressing mechanism 102 and the detection process, thereby improving the accuracy of the detection.

[0054] In an optional solution of this embodiment, the pressing mechanism 102 includes a pressing drive device 120 and a pressing plate 121. The pressing drive device 120 is specifically a cylinder, and the driving end of the pressing drive device 120 is connected to the pressing plate 121 to apply pressure to a preset surface of the battery 105, and the long side and the wide side of the battery 105 are surrounded to form the preset surface. The preset surface is the large surface of the battery 105, and the pressing mechanism 102 applies pressure to the large surface of the battery 105 to make the shell and the battery cell fit together, so as to improve the detection rate of the battery 105 with the negative electrode in virtual contact with the shell.

[0055] Furthermore, the pressure range of the pressure plate 121 is smaller than the extension range of the preset surface, so that an unpressurized area is left in the circumference of the preset surface, which can avoid the short side from being compressed and deformed, and the pressure range avoids the welding area between the positive and negative electrode covers and the shell, avoiding pressure damage to the weld of the battery 105.

[0056] Embodiment 2

[0057] The battery side voltage detection device in the second embodiment is an improvement on the above embodiment. The technical contents disclosed in the above embodiment will not be described repeatedly, and the contents disclosed in the above embodiment also belong to the contents disclosed in the second embodiment.

[0058] In an alternative solution of this embodiment, the battery edge voltage detection device further includes a protective cover 122, which includes a bottom plate 123 and a cover body 124. The cover body 124 is buckled on the bottom plate 123 to enclose an accommodation space. The detection platform 101 is installed on the bottom plate 123, and the pressing mechanism 102 and the detection mechanism are installed on the cover body 124. As Figure 1 and Figure 2 shown, the cover body 124 is U-shaped and covers a part of the area of the bottom plate 123. The area not covered by the cover body 124 is the loading area of the battery 105. Windows 125 are respectively opened on two opposite side plates of the cover body 124, and the positive electrode driving device 107 and the negative electrode driving device 109 are respectively installed at the two windows 125.

[0059] The pressing driving device 120 of the pressing mechanism 102 is installed outside the top plate of the cover body 124, and a through hole is opened on the top plate of the cover body 124. The driving shaft of the pressing driving device 120 can pass through the through hole and be connected to the pressing plate 121. A guiding member is arranged between the pressing mechanism 102 and the cover body 124 to guide the pressing movement of the pressing mechanism 102. Specifically, the guiding member includes a plurality of guiding rods 126 arranged on the pressing plate 121, and corresponding guiding holes are opened on the top plate of the cover body 124. When the pressing driving device 120 drives the pressing plate 121 to move up and down, the guiding rods 126 move along the guiding holes to guide the up and down movement of the pressing plate 121.

[0060] Embodiment III

[0061] Embodiment III of the present application provides a detection system, which includes the battery edge voltage detection device of any one of the above embodiments. Therefore, it has all the beneficial technical effects of the battery edge voltage detection device of any one of the above embodiments, and will not be elaborated here.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. In addition, those skilled in the art can understand that although some embodiments herein include some features included in other embodiments but not other features, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments.

Claims

1. A battery side voltage detection device, characterized in that, It includes a detection platform, a pressing mechanism and a detection mechanism; The detection platform is used for positioning the battery; the pressing mechanism is arranged opposite to the detection platform to press the battery; the detection platform can translate on a horizontal plane so that the battery is directly opposite to the pressing part of the pressing mechanism; The detection mechanism includes a positive electrode detection component and a negative electrode detection component; the positive electrode detection component is opposite to the positive electrode side of the battery to detect the voltage between the positive electrode post of the battery and the battery housing; the negative electrode detection component is opposite to the negative electrode side of the battery to detect the voltage between the negative electrode post of the battery and the battery housing.

2. The battery edge voltage detection device according to claim 1, wherein Both the positive electrode detection component and the negative electrode detection component are provided with visual detection probes to distinguish the positive electrode post and the negative electrode post.

3. The battery edge voltage detection device according to claim 2, wherein, The visual detection probe is a color code sensor, and the color code sensor is used to detect the injection molded part colors of the positive electrode post and the negative electrode post.

4. The battery edge voltage detection device according to claim 1, characterized in that, The positive electrode detection component includes a positive electrode driving device and a positive electrode detection head; the driving end of the positive electrode driving device is connected to the positive electrode detection head to drive the positive electrode detection head to approach or move away from the positive electrode side of the battery; The negative electrode detection component includes a negative electrode driving device and a negative electrode detection head; the driving end of the negative electrode driving device is connected to the negative electrode detection head to drive the negative electrode detection head to approach or move away from the negative electrode side of the battery.

5. The battery edge voltage detection device according to claim 4, characterized in that The positive electrode detection head includes a positive electrode voltage probe, and the positive electrode voltage probe is used for electrically connecting with the positive electrode post; The negative electrode detection head includes a negative electrode voltage probe and a housing voltage probe. The negative electrode voltage probe is used for electrically connecting with the negative electrode post, and the housing voltage probe is used for electrically connecting with the housing exposed at the opening of the battery patch.

6. The battery edge voltage detection device according to claim 1, characterized in that The detection platform includes a translation driving device, a guiding component and a positioning table; The positioning table is used for positioning the battery; the positioning table is connected to the guiding component, and the driving end of the translation driving device is connected to the positioning table to drive the positioning table to reciprocate along the guiding direction of the guiding component.

7. The battery edge voltage detection device according to claim 6, wherein The positioning table includes a bearing plate and a plurality of positioning blocks; The driving end of the translation driving device is connected to the bearing plate, and the bearing plate is used for supporting the battery; a plurality of the positioning blocks are installed on the bearing surface of the bearing plate to respectively position the two sides in the length direction and the two sides in the width direction of the battery.

8. The battery edge voltage detection device according to claim 1, characterized in that, The pressing mechanism includes a pressing driving device and a pressing plate; The driving end of the pressing driving device is connected to the pressing plate to press a preset surface of the battery, and the long side and the wide side of the battery enclose to form the preset surface; The pressing range of the pressing plate is smaller than the extending range of the preset surface, so that an unpressured area is left in the circumferential direction of the preset surface.

9. The battery edge voltage detection device according to claim 1, characterized in that, It further includes a protective cover; The protective cover includes a bottom plate and a cover body, and the cover body is buckled on the bottom plate to enclose to form an accommodating space; The detection platform is installed on the bottom plate, and the pressing mechanism and the detection mechanism are installed in the cover body; a guiding member is arranged between the pressing mechanism and the cover body to guide the pressing movement of the pressing mechanism.

10. A detection system, characterized in that, Comprising the battery edge voltage detection device according to any one of claims 1 to 9.

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