Battery detection device and detection method thereof

Abstract

The invention relates to a battery detection device and a detection method thereof, and the device comprises a bearing part (8) which is configured to carry a to-be-detected battery (7); a detection electrode (1) mounted on the carrier member (8) and configured to apply a detection voltage to the battery (7); the plurality of defect detection parts (4) are connected with the bearing part (8) and are configured to be respectively positioned in different directions of the battery (7); and the controller (3) is in signal connection with the plurality of defect detection components (4) so as to judge the positions of the defects (10) of the battery (7) according to information fed back by the defect detection components (4). The problems that in the prior art, operation is complex when the positions of the defects of the battery are found by disassembling the battery, and the defects are prone to being damaged due to disassembling and cannot be recognized are solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery detection device and a detection method thereof. Background Art

[0002] Based on safety requirements, battery manufacturers need to conduct insulation and voltage withstand tests on batteries to ensure battery safety. At present, battery insulation and voltage withstand test devices can only test the insulation and voltage withstand performance of the battery as a whole.

[0003] Application Contents

[0004] The present application aims to provide a battery detection device and a detection method thereof which can capture the location of battery defects.

[0005] According to one aspect of an embodiment of the present application, the present application provides a battery detection device, the battery detection device comprising:

[0006] A carrier component configured to hold a battery to be tested;

[0007] A plurality of defect detection components connected to the carrying component and configured to be located at different positions of the battery; and

[0008] The controller is signal-connected to the plurality of defect detection components respectively to determine the location of the defect of the battery according to the information fed back by the defect detection components.

[0009] In some embodiments, the defect detection component includes a sound sensor or a vibration sensor.

[0010] In some embodiments, the defect detection component includes a sonic resistor, and the battery detection device also includes multiple ammeters arranged one-to-one corresponding to the sonic resistors. The ammeters are connected in series with the corresponding sonic resistors to form a detection branch, and the controller is signal-connected to the multiple ammeters respectively.

[0011] In some embodiments, the battery detection device further includes a power supply, and the multiple detection branches are electrically connected to the power supply respectively, and the multiple detection branches are connected in parallel.

[0012] In some embodiments, the battery detection device further includes a mounting substrate connected to the carrier component, and a plurality of defect detection components are arranged on the mounting substrate.

[0013] In some embodiments, a plurality of mounting substrates are included, and the plurality of mounting substrates are arranged to face different surfaces of the battery.

[0014] In some embodiments, the mounting substrate is configured to be movable relative to the supporting component to adjust the distance between the mounting substrate and the battery or to attach the defect detection component to the surface of the battery.

[0015] In some embodiments, a plurality of defect detection components are arranged in an array on a mounting substrate.

[0016] In some embodiments, the battery detection device includes power supplies arranged in a one-to-one correspondence with the mounting substrates, and the defect detection components arranged on the same mounting substrate are electrically connected to the power supplies corresponding to the mounting substrates, respectively.

[0017] In some embodiments, the carrying component includes a sound-proof chamber for accommodating a battery, and the detection electrodes and the defect detection component are disposed in the sound-proof chamber.

[0018] In some embodiments, the detection electrode is movable relative to the supporting component to adjust the relative position of the detection electrode and the battery.

[0019] In some embodiments, the battery testing device further includes a testing electrode mounted on the carrier component and configured to apply a voltage for withstand voltage testing to the battery.

[0020] According to another aspect of the present application, a detection method of the above-mentioned battery detection device is also provided, and the detection method comprises:

[0021] Arrange a plurality of defect detection components on the surface of the battery;

[0022] A detection voltage is applied to the battery and information fed back by multiple defect detection components is collected, and the failure position of the battery is determined based on the location of the defect detection component with abnormal information.

[0023] In some embodiments, applying a detection voltage to a battery and collecting information fed back by a plurality of defect detection components are performed in a silent environment.

[0024] In some embodiments, the arrangement defect detection component includes an arrangement sound sensor or a sonic resistor.

[0025] In some embodiments, arranging the defect detection components includes placing the defect detection components in an array on the surface of the battery.

[0026] By applying the technical solution of the present application, when testing a battery, a plurality of defect detection components are arranged around the battery, and the location of the battery defect can be determined based on the position of the defect detection component that outputs abnormal information, thereby improving the problem in the prior art of finding the location of the battery defect by disassembling the battery, which causes complicated operation and the defect is easily unrecognizable due to disassembly and damage.

[0027] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 A schematic diagram of the structure of an electric device disclosed in some embodiments of the present application is shown;

[0030] Figure 2 A schematic diagram of the exploded structure of a battery disclosed in some embodiments of the present application is shown;

[0031] Figure 3 A schematic diagram of the structure of a battery cell disclosed in some embodiments of the present application is shown;

[0032] Figure 4 A schematic diagram of the three-dimensional structure of a battery detection device disclosed in some embodiments of the present application is shown;

[0033] Figure 5 A schematic cross-sectional structure diagram of a battery detection device disclosed in some embodiments of the present application is shown;

[0034] Figure 6 A layout diagram of a defect detection component and a battery of a battery detection device disclosed in some embodiments of the present application is shown;

[0035] Figure 7 A working flow chart of a battery detection device disclosed in some embodiments of the present application is shown. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0038] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0039] Further, " scope " disclosed in the present application is limited in the form of lower limit and upper limit, and given range is limited by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of special range. The scope limited in this way can be including end value or not including end value, and can be combined arbitrarily, that is, any lower limit can form a scope with any upper limit combination. For example, if the scope of 60-120 and 80-110 is listed for a particular parameter, it is understood that the scope of 60-110 and 80-120 is also expected. In addition, if the minimum range value 1 and 2 listed, and if the maximum range value 3,4 and 5 are listed, the following scope can all be expected: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the present application, unless otherwise specified, the numerical range "ab" represents the abbreviation of any real number combination between a and b, wherein a and b are real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0040] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0041] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0042] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0043] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0044] If not specifically stated, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0045] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0046] In order to ensure the safety performance of the battery, the battery needs to be tested after the production and processing of the battery is completed. The battery testing device in the related technology can only test whether there are defects in the battery as a whole, but cannot directly trace the location of the defect of the battery. When it is necessary to determine the specific situation of the battery defect in order to improve the battery, it is often necessary to determine the location of the battery defect. In order to determine the location of the battery defect, the battery needs to be disassembled. The disassembly process requires searching all the positions of the product. The disassembly process is easy to damage the battery and even makes it difficult to identify the defect point.

[0047] In order to solve the above-mentioned problems, the present embodiment provides a battery detection device, which includes a plurality of defect detection components respectively arranged at a plurality of positions of a battery to be detected and a controller respectively connected to the plurality of defect detection components by signals, so as to judge the position of the defect of the battery according to the position of the defect detection component which outputs abnormal information, thereby improving the problem in the prior art of finding the position of the defect of the battery by disassembling the battery, which is complicated in operation and the defect is easy to be unrecognizable due to damage caused by disassembly.

[0048] In some embodiments, the battery inspection device is configured to perform an insulation withstand voltage test on the battery, and the above-mentioned defects are failure points generated during the insulation withstand voltage test.

[0049] Figure 1 FIG. 1 shows a schematic diagram of a structure of an electric device using a battery as a power source; Figure 1 As shown, the power-consuming device of this embodiment includes a vehicle 1000, which may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery pack 100 is disposed inside the vehicle 1000, and the battery pack 100 may be disposed at the bottom, head, or tail of the vehicle 1000. The battery pack 100 may be used to power the vehicle 1000, for example, the battery pack 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery pack 100 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.

[0050] In some embodiments of the present application, the battery pack 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0051] Please refer to Figure 2 , Figure 2An exploded view of a battery pack 100 provided for some embodiments of the present application. The battery pack 100 includes a case 110 and a battery module disposed in the case 110, the battery module includes a plurality of battery cells 120, and the battery cells 120 are accommodated in the case 110. Among them, the case 110 is used to provide a storage space for the battery cells 120, and the case 110 can adopt a variety of structures. In some embodiments, the case 110 may include a first portion 111 and a second portion 112, the first portion 111 and the second portion 112 cover each other, and the first portion 111 and the second portion 112 jointly define a storage space for accommodating the battery cells 120. The second part 112 may be a hollow structure with one end open, and the first part 111 may be a plate-like structure, and the first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 may also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box body 110 formed by the first part 111 and the second part 112 may be in various shapes, such as a cylinder, a cuboid, etc.

[0052] In the battery pack 100, there may be multiple battery cells 120, and the multiple battery cells 120 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 120 are both connected in series and in parallel. The multiple battery cells 120 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 120 is accommodated in the box 110; of course, the battery pack 100 may also be a battery module formed by connecting multiple battery cells 120 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 110. The battery pack 100 may also include other structures, for example, the battery pack 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 120.

[0053] Each battery cell 120 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 120 may be cylindrical, flat, rectangular, or in other shapes.

[0054] Please refer to Figure 3 , Figure 3 The schematic diagram of the decomposition structure of the battery cell 120 provided in some embodiments of the present application. The battery cell 120 refers to the smallest unit constituting the battery pack 100. Figure 3 The battery cell 120 includes an end cover 121, a shell 122, a battery cell assembly 123 and other functional components.

[0055] The end cap 121 is a component that covers the opening of the housing 122 to isolate the internal environment of the battery cell 120 from the external environment. Functional components such as electrode terminals 121a may be provided on the end cap 121. The electrode terminals 121a may be used to electrically connect to the battery cell assembly 123 to output or input electrical energy of the battery cell 120.

[0056] The housing 122 is a component used to cooperate with the end cover 121 to form an internal environment of the battery cell 120 , wherein the formed internal environment can be used to accommodate the battery cell assembly 123 , electrolyte and other components.

[0057] The cell assembly 123 is a component where electrochemical reactions occur in the battery cell 100. The housing 122 may contain one or more cell assemblies 123. The cell assembly 123 is mainly formed by winding or stacking pole sheets, wherein the pole sheets include a positive pole sheet and a negative pole sheet, and a separator is usually provided between the positive pole sheet and the negative pole sheet.

[0058] The electrode sheet mainly includes a thin sheet current collector and an active material coated on the current collector. The parts of the positive and negative electrode sheets with active materials constitute the main body of the battery cell assembly, and the parts of the positive and negative electrode sheets without active materials each constitute the pole ear 123a.

[0059] Combination Figures 4 to 6 As shown, the battery detection device of this embodiment includes a carrying component 8, a detection electrode 1, a plurality of defect detection components 4 and a controller 3. The carrying component 8 is configured to place the battery 7 to be detected; the plurality of defect detection components 4 are connected to the carrying component 8 and are configured to be located at different positions of the battery 7; the controller 3 is signal-connected to the plurality of defect detection components 4, respectively, to determine the position of the defect 10 of the battery 7 according to the information fed back by the detection component 4.

[0060] “Different positions” means that each detection component is located at a position of the battery respectively, and any two detection components are not at the same position of the battery.

[0061] The controller 3 may be an embedded system or a PLC.

[0062] In some embodiments, the battery detection device further includes a detection electrode 1, which is mounted on a carrier component 8 and configured to apply a voltage for insulation withstand voltage detection to the battery 7. The battery detection device is used to perform insulation withstand voltage detection on the battery, and the defect detection component 4 is used to detect whether a failure point of insulation withstand voltage detection is generated at its location.

[0063] The detection electrode 1 is a member having conductive properties, and may be, for example, a tube, aluminum, or silver, etc. The detection electrode 1 is connected to a detection power supply point.

[0064] In the technical solution of this embodiment, when testing the battery 7, a plurality of defect detection components 4 are arranged around the battery 7. The position of the defect 10 of the battery 7 can be determined based on the position of the defect detection component 4 that outputs abnormal information, thereby improving the problem in the prior art of finding the position of the defect 10 of the battery 7 by disassembling the battery 7, which causes complicated operation and the defect 10 is easily unrecognizable due to damage caused by disassembly.

[0065] In some embodiments,

[0066] In some embodiments, the defect detection component 4 includes a sound sensor. When the weak point of the battery 7 is broken down due to the detection voltage, the broken position will emit a sound. By detecting the difference in the sound emitted from different positions of the battery 7, the defect 10 can be captured.

[0067] In other embodiments, the defect detection component 4 includes a vibration sensor, which detects vibrations at a weak point of the battery 7 during a voltage breakdown process to be detected, and captures defects of the battery 7 by the difference in vibrations detected by different vibration sensors.

[0068] In some embodiments, the defect detection component 4 is configured to be attached to the surface of the battery 7 to accurately sense the sound emitted by the battery 7 to be detected. A plurality of defect detection components 4 are arranged in an array on the surface of the battery 7 to accurately locate the defect 10.

[0069] The power supply of the defect detection component 4 and the power supply of the detection electrode 1 are independent of each other. The defect detection component uses an independent power supply to prevent the signal of the defect detection component 4 from being interfered.

[0070] In some embodiments, an interface of an insulation withstand voltage test circuit including detection electrodes is built into the test device.

[0071] In some embodiments, in combination Figure 6 As shown, the defect detection component 4 includes a sonic resistor, and the battery detection device also includes a plurality of ammeters 11 arranged one by one corresponding to the sonic resistor. The ammeter 11 is connected in series with the corresponding sonic resistor to form a detection branch, and the controller 3 is signal-connected to the plurality of ammeters 11. The resistance of the sonic resistor changes according to the change of the sound. After the resistance of the sonic resistor changes, the current of the ammeter 1 connected in series with the sonic resistor also changes accordingly. The controller 3 is signal-connected to the ammeters 11 in the plurality of detection branches, and judges whether the battery 7 at the location of the corresponding sonic resistor is failed according to the current value in the detection branch fed back by the ammeter 11.

[0072] In some embodiments, the battery detection device also includes a power supply, multiple detection branches are electrically connected to the power supply respectively, multiple detection branches are connected in parallel, each detection branch includes a sonic resistor and an ammeter, and the multiple detection branches are independent of each other so that the ammeter 11 in each detection branch can feedback the sound at the location of the sonic resistor of the detection branch.

[0073] In some embodiments, the battery detection device further includes a mounting substrate 5 connected to the supporting component 8 , and a plurality of defect detection components 4 are arranged on the mounting substrate 5 .

[0074] In some embodiments, the battery testing device includes a plurality of mounting substrates 5, and the plurality of mounting substrates 5 are configured to face different surfaces of the battery 7. The insulation withstand voltage testing device of this embodiment can simultaneously test multiple surfaces of the battery 7, which is conducive to accurately locating the defects 10. In some embodiments, the mounting substrate 5 is an electrical insulating plate.

[0075] In some embodiments, the mounting substrate 5 is configured to be movable relative to the supporting component 8 to adjust the distance between the mounting substrate 5 and the battery 7 or to attach the defect detection component 4 to the surface of the battery 7 .

[0076] Combination Figure 4 and Figure 5 As shown, the battery insulation detection device further includes a substrate bearing component 6. The substrate bearing component 6 is configured to drive the mounting substrate 5 to move relative to the bearing component 8 to adjust the distance between the mounting substrate 5 and the battery 7 or to attach the defect detection component 4 to the surface of the battery 7.

[0077] In some embodiments, the substrate bearing component 6 includes a hydraulic cylinder. In other embodiments, the substrate bearing component 6 includes a telescopic guide rail, which includes a slide rail and a moving component movably connected to the slide rail, the extension direction of the slide rail and the moving component are consistent with the moving direction of the moving component, the telescopic guide rail extends when the moving component moves outward (extends) relative to the slide rail, and the moving component moves inward (retracts) relative to the slide rail, the moving component is connected to the mounting substrate 5, the slide rail is connected to the bearing component 8, and the moving component drives the mounting substrate 5 close to the surface of the battery 7 when it extends to the outer end of the slide rail.

[0078] In some embodiments, multiple defect detection components 4 are arranged in an array on the mounting substrate 5. After the substrate 5 is attached to the surface of the battery 7, the multiple defect detection components 4 are arranged in an array on the surface of the battery 7 to accurately locate the defect 10.

[0079] In some embodiments, the battery detection device includes power supplies arranged one-to-one corresponding to the mounting substrates 5, and the defect detection components 4 arranged on the same mounting substrate 5 are electrically connected to the power supplies corresponding to the mounting substrate 5 respectively so that the voltage of each defect detection component 4 is stable and uniform.

[0080] In some embodiments, the carrying component 8 includes a soundproof chamber for accommodating the battery 7, and the detection electrode 1 and the defect detection component 4 are arranged in the soundproof chamber to prevent external noise from affecting the detection result, so as to ensure the accuracy of the detection result. One side of the soundproof chamber is open, which is used for taking and placing the battery and installing the detection device. A soundproof door 9 that can be opened and closed is arranged on the opening of the soundproof chamber.

[0081] In some embodiments, the detection electrode 1 is movable relative to the carrier 8 to adjust the relative position of the detection electrode 1 and the battery 7. The battery detection device further includes a motion mechanism 4 mounted on the carrier 8, and the motion mechanism 4 is used to drive the detection electrode to adjust the position.

[0082] There are two detection electrodes 1, one detection electrode 1 is connected to the battery shell, and the other detection electrode is used to connect to the battery terminal. The position adjustment of the detection electrode 1 can be suitable for connecting to the terminals of batteries 7 of different sizes.

[0083] In some embodiments, the motion mechanism 4 includes a two-position motion mechanism configured to drive the detection electrode 1 to move in a two-position plane parallel to an end face of the battery. In some embodiments, the two-position motion mechanism includes a first lead screw, a first slider threadedly matched with the first lead screw, a bracket mounted on the first slider to move along the first lead screw with the slider, a second lead screw rotatably mounted on the bracket, and a second slider threadedly matched with the second lead screw, and the second slider is connected to the detection electrode 1.

[0084] In other embodiments, the detection electrode 1 is configured to move in a direction perpendicular to the above-mentioned two-dimensional plane to approach or move away from the end face of the battery 7. In some embodiments, the motion mechanism further includes a linear motion component connected to the second slider, and the linear motion component is configured to drive the detection electrode 1 to approach or move away from the end face of the battery 7. The linear motion component can be a hydraulic cylinder, a linear motor or a screw transmission mechanism, etc.

[0085] In this embodiment, the battery detection device includes two opposite mounting substrates 5 facing the battery 7 respectively and one mounting substrate 5 located on the bottom surface of the battery 7 .

[0086] In some other embodiments, a mounting substrate 5 is also provided on one side of the battery 7 where the detection electrode 1 is provided. The mounting substrate 5 is provided with a through hole allowing the detection electrode 1 to pass through.

[0087] Specifically, in this embodiment, after the battery (module / Pack) is connected to the insulation withstand voltage test circuit, the defect test component 4 is also attached to the bottom and side surfaces of the battery 7. When a breakdown effect occurs inside the battery 7, the defect detection component 4 (acoustic resistor) synchronously captures the failure sound source, thereby causing the resistance change of the acoustic resistor in the attached part. The array acoustic resistor is attached to each surface of the product to monitor the failure sound source at each position; the outer shell of the test device is a soundproof sealing device that can isolate external interference noise; when a certain part of the battery is broken down, due to the change of the acoustic resistor, the parallel current representation value changes synchronously and is transmitted back to the display interface. According to the current value distribution, the specific defect can be determined.

[0088] According to another aspect of the present application, a detection method of the battery detection device mentioned above is also provided, and the detection method comprises:

[0089] Arrange a plurality of defect detection components 4 on the surface of the battery 7;

[0090] A detection voltage is applied to the battery 7 and information fed back by multiple defect detection components 4 is collected, and the failure position of the battery 7 is determined according to the position of the defect detection component 4 with abnormal information.

[0091] In the technical solution of the present embodiment, when the insulation withstand voltage test is performed on the battery 7, a plurality of defect detection components 4 are arranged around the battery 7. The position of the insulation withstand voltage defect 10 of the battery 7 can be determined based on the position of the defect detection component 4 that outputs abnormal information. This improves the problem in the prior art of finding the position of the defect 10 of the battery 7 by disassembling the battery 7, which causes complicated operation and the defect 10 is easily unrecognizable due to damage during disassembly.

[0092] In some embodiments, applying the detection voltage to the battery 7 and collecting the information fed back by the multiple defect detection components 4 are performed in a silent environment. The detection electrode 1 and the defect detection component 4 are arranged in a soundproof chamber to prevent external noise from affecting the detection result, so as to ensure the accuracy of the detection result.

[0093] In some embodiments, the arrangement defect detection component 4 includes an arrangement sound sensor or a sonic resistor.

[0094] In some embodiments, arranging the defect detection components 4 includes placing the defect detection components 4 in an array on the surface of the battery 7 to accurately locate the defects 10 .

[0095] Combination Figure 7 Specifically, the insulation withstand voltage test process of this embodiment is as follows:

[0096] a) The entire test process is carried out in a soundproof environment formed by a soundproof chamber and a movable soundproof door 9. The defect detection component 4 (array acoustic sensor) is integrated on an absolute mounting substrate 5 attached to the battery 7. Multiple mounting substrates 5 are distributed on the bottom and two sides of the battery 7 (as shown in 4);

[0097] b) After the battery 7 to be tested enters the sound insulation station, the movable guide rail 4 is fixedly connected to the sound insulation board 6, and the insulation withstand voltage test probe 5 is integrated on the movable guide rail 4 to perform an insulation withstand voltage test on the battery 7 to be tested;

[0098] c) During the insulation withstand voltage test, the defect detection components 4 arranged in a three-sided array synchronously capture and locate the insulation withstand voltage defects of the battery 7;

[0099] d) The acoustic resistors of each failure detection component 4 are connected in parallel in the same power supply circuit, and each acoustic resistor is connected in series with an ammeter. When no failure occurs, the current values ​​of each parallel circuit are the same. When a certain part of the product is broken down, the acoustic resistor changes, and the value of the parallel ammeter changes synchronously, which is transmitted back to the display interface. According to the current value distribution, the specific defect can be determined;

[0100] e) The insulation withstand voltage test results and the failure sound source location results are fed back to the controller (PLC controller) at the same time, and the information is transmitted to the on-site host computer.

[0101] f) Compared with the existing technology, this insulation withstand voltage test solution is more accurate and efficient in determining the location of insulation withstand voltage failure, which significantly improves the efficiency of insulation withstand voltage test failure analysis at the production site and significantly reduces the risk of missed failures.

[0102] The above are merely exemplary embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery detection device, characterized in that: include: A carrier component (8) configured to place a battery (7) to be tested; A plurality of defect detection components (4) connected to the carrying component (8) and configured to be located at different positions of the battery (7); as well as The controller (3) is signal-connected to the plurality of defect detection components (4) respectively, so as to determine the location of the defect (10) of the battery (7) based on the information fed back by the defect detection components (4).

2. The battery detection device according to claim 1, characterized in that: The defect detection component (4) includes a sound sensor or a vibration sensor.

3. The battery detection device according to claim 1, characterized in that: The defect detection component (4) includes a sonic resistor, and the battery detection device also includes a plurality of ammeters (11) arranged in one-to-one correspondence with the sonic resistors, the ammeters (11) are connected in series with the corresponding sonic resistors to form a detection branch, and the controller (3) is signal-connected to the plurality of ammeters (11) respectively.

4. The battery detection device according to claim 3, characterized in that: It also includes a power supply, and the multiple detection branches are electrically connected to the power supply respectively, and the multiple detection branches are connected in parallel.

5. The battery detection device according to claim 1, characterized in that: It also comprises a mounting substrate (5) connected to the bearing component (8), and a plurality of the defect detection components (4) are arranged on the mounting substrate (5).

6. The battery detection device according to claim 5, characterized in that: The invention comprises a plurality of mounting substrates (5), and the plurality of mounting substrates (5) are arranged to face different surfaces of the battery (7).

7. The battery testing device according to claim 5, characterized in that: The mounting substrate (5) is configured to be movable relative to the supporting component (8) so as to adjust the distance between the mounting substrate (5) and the battery (7) or to attach the defect detection component (4) to the surface of the battery (7).

8. The battery testing device according to claim 5, characterized in that: The plurality of defect detection components (4) are arranged in an array on the mounting substrate (5).

9. The battery testing device according to claim 5, characterized in that: It comprises power supplies arranged in one-to-one correspondence with the mounting substrates (5), and the defect detection components (4) arranged on the same mounting substrate (5) are respectively electrically connected to the power supplies corresponding to the mounting substrates (5).

10. The battery testing device according to claim 1, characterized in that: The bearing component (8) comprises a soundproof chamber for accommodating the battery (7), and the detection electrode (1) and the defect detection component (4) are arranged in the soundproof chamber.

11. The battery testing device according to claim 1, characterized in that: The detection electrode (1) is movable relative to the supporting component (8) to adjust the relative position of the detection electrode (1) and the battery (7).

12. The battery detection device according to claim 1, characterized in that: It also comprises a detection electrode (1), which is mounted on the supporting component (8) and is configured to apply a voltage for withstand voltage detection to the battery (7).

13. A detection method for a battery detection device according to any one of claims 1 to 12, characterized in that: include: Arranging a plurality of the defect detection components (4) on the surface of the battery (7); A detection voltage is applied to the battery (7) and information fed back by a plurality of defect detection components (4) is collected, and the failure position of the battery (7) is determined based on the position of the defect detection component (4) with abnormal information.

14. The detection method according to claim 13, characterized in that: The applying of the detection voltage to the battery (7) and the collection of information fed back by the plurality of defect detection components (4) are performed in a silent environment.

15. The detection method according to claim 13, characterized in that: Arranging the defect detection component (4) includes arranging sound sensors or acoustic resistors.

16. The detection method according to claim 13, characterized in that: Arranging the defect detection components (4) includes arranging the defect detection components (4) in an array on the surface of the battery (7).

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