Detection circuit and method

Abstract

The present application discloses a detection circuit and method, belonging to the field of battery detection technology. The present application sets multiple detection devices and multiple path switching circuits in the detection circuit, wherein the input end of the path switching circuit is respectively connected to different test circuits, each test circuit is respectively connected to the test end corresponding to the battery cell to be tested, and the output end of each path switching circuit is respectively connected to multiple detection devices; the path switching circuit is used to connect the detection device corresponding to the detection signal and the test end corresponding to the battery cell to be tested according to the detection signal; the detection device is used to obtain the detection result of the battery cell to be tested.

Description

Detection circuit and method Technical Field

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

[0002] In the actual production process of batteries, different types of battery products may have two possible types of positive and negative poles. The batteries need to be tested, and the testing process cannot be automated.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a detection circuit and method, which aim to solve the technical problem of being unable to automatically detect batteries.

[0005] In a first aspect, an embodiment of the present application provides a detection circuit, comprising a plurality of detection devices and a plurality of path switching circuits; an input end of each path switching circuit is respectively connected to a different test circuit, each test circuit is respectively connected to a test end corresponding to a battery cell to be tested, and an output end of each path switching circuit is respectively connected to the plurality of detection devices;

[0006] The path switching circuit is used to connect the detection device corresponding to the detection signal and the test terminal corresponding to the battery cell to be tested according to the detection signal;

[0007] The detection device is used to obtain the detection result of the battery cell to be tested.

[0008] In this embodiment, multiple detection devices and multiple path switching circuits are set in the detection circuit, the input end of the path switching circuit is respectively connected to different test circuits, each test circuit is respectively connected to the test end corresponding to the battery cell to be tested, and the output end of each path switching circuit is respectively connected to multiple detection devices; the path switching circuit is used to connect the detection device corresponding to the detection signal and the test end corresponding to the battery cell to be tested according to the detection signal; the detection device is used to obtain the detection result of the battery cell to be tested, and can automatically switch the corresponding detection device to detect the battery cell to be tested according to the detection signal, thereby realizing automated testing of the battery cell to be tested.

[0009] In some embodiments, the detection device includes an insulation detection device and a voltage detection device, there are multiple battery cells to be tested, and the path switching circuit includes: an insulation test channel and a voltage test channel;

[0010] The input end of the insulation test channel is respectively connected to the test ends corresponding to the positive electrodes of the plurality of battery cells to be tested, and the output end of the insulation test channel is connected to the insulation detection device;

[0011] The input end of the voltage test channel is connected to the test end corresponding to the positive electrode of each battery cell to be tested and the test end corresponding to the negative electrode of each battery cell to be tested, and the output end of the voltage test channel is connected to the voltage detection device;

[0012] The insulation detection device is used to obtain the insulation detection result of the battery cell to be tested when the insulation test channel is connected;

[0013] The voltage detection device is used to obtain the voltage detection result of the battery cell to be tested when the voltage test channel is connected.

[0014] In the technical solution of the embodiment of the present application, the detection equipment is configured as an insulation detection equipment and a voltage detection equipment. Different detection equipment are connected to corresponding test channels. When the corresponding test channels are connected, the corresponding detection equipment can detect the battery cell to be tested and obtain the detection results. The voltage and insulation of the battery cell to be tested can be detected separately to meet the different detection types of the battery cell to be tested and expand the detection range of the battery cell to be tested.

[0015] In some embodiments, the insulation test channel includes a first insulation test channel and a second insulation test channel, and the plurality of battery cells to be tested include: a first battery cell to be tested and a second battery cell to be tested, wherein the first battery cell to be tested and the second battery cell to be tested are independent of each other;

[0016] The input end of the first insulation test channel is connected to the test end corresponding to the positive electrode of the first battery cell to be tested, and the output end of the first insulation test channel is connected to the insulation detection device;

[0017] The input end of the second insulation test channel is connected to the test end corresponding to the positive electrode of the second battery cell to be tested, and the output end of the second insulation test channel is connected to the insulation detection device.

[0018] In the technical solution of the embodiment of the present application, when the insulation test result is obtained by performing insulation test on the battery cell to be tested by the insulation detection equipment, the insulation test channel is divided into a first insulation test channel and a second insulation test channel, so that the insulation test is performed between the positive pole of the first battery cell to be tested and the positive pole of the second battery cell to be tested at the same time. Compared with the problem of missed test in manual testing of the insulation between the positive poles of each battery cell to be tested, the present application can realize self-test of the insulation test circuit during detection, thereby improving the accuracy and completeness of the detection.

[0019] In some embodiments, the path switching circuit further includes: a first switch array and a second switch array;

[0020] The first switch array is provided on the first insulation test channel, the input end of the first switch array is connected to the test end corresponding to the positive electrode of the first battery cell to be tested, and the output end of the first switch array is connected to the insulation detection device;

[0021] The second switch array is provided on the second insulation test channel, the input end of the second switch array is connected to the test end corresponding to the positive electrode of the second battery cell to be tested, and the output end of the second switch array is connected to the insulation detection device;

[0022] The first switch array and the second switch array are used to close when performing insulation testing on the first battery cell to be tested and the second battery cell to be tested, and at the same time connect the test end corresponding to the positive electrode of the first battery cell to be tested with the insulation detection equipment and the test end corresponding to the positive electrode of the second battery cell to be tested with the insulation detection equipment.

[0023] In the technical solution of the embodiment of the present application, a first switch array and a second switch array are set in the path switching circuit. The first switch array is set on the first insulation test channel, and the second switch array is set on the second insulation test channel. When the insulation test is performed on the positive electrode between the first battery cell to be tested and the second battery cell to be tested, the circuit compatibility design of the insulation test between the positive electrodes of each battery cell to be tested is realized.

[0024] In some embodiments, the voltage test channel includes a first voltage test channel and a second voltage test channel;

[0025] The input end of the first voltage test channel is connected to the first test end corresponding to the positive electrode of each battery cell to be tested, and the output end of the first voltage test channel is connected to the voltage detection device;

[0026] The input end of the second voltage test channel is connected to the first test end corresponding to the negative electrode of each battery cell to be tested, and the output end of the second voltage test channel is connected to the voltage detection device.

[0027] In the technical solution of the embodiment of the present application, a first voltage test channel and a second voltage test channel are set in the voltage test channel, the first voltage test channel is respectively connected to the test end corresponding to the positive pole of the battery cell to be tested, and the second voltage test channel is respectively connected to the test end corresponding to the negative pole of the battery cell to be tested, so that a voltage detection loop is formed between the first voltage test channel and the second voltage test channel and the positive and negative poles of the battery cell to be tested and the voltage detection device, thereby realizing automatic voltage detection of the battery cell to be tested.

[0028] In some embodiments, the path switching circuit further includes: a third switch array and a fourth switch array;

[0029] The third switch array is provided on the first voltage test channel, the input end of the third switch array is connected to the first test end corresponding to the positive electrode of the battery cell to be tested, and the output end of the third switch array is connected to the voltage detection device;

[0030] The fourth switch array is provided on the second voltage test channel, the input end of the fourth switch array is connected to the first test end corresponding to the negative electrode of the battery cell to be tested, and the output end of the fourth switch array is connected to the voltage detection device;

[0031] The third switch array and the fourth switch array are used to close when performing a voltage test on the battery cell to be tested, connecting the first test end corresponding to the positive electrode of the battery cell to be tested with the voltage detection device and the first test end corresponding to the negative electrode of the battery cell to be tested with the voltage detection device.

[0032] In the technical solution of the embodiment of the present application, a third switch array and a fourth switch array are further provided in the path switching circuit, the third switch array is provided on the first voltage test channel, and the fourth switch array is provided on the second voltage test channel, so that they are closed when the voltage test is performed on the positive and negative poles of the battery cells to be tested, thereby realizing automated testing of the positive and negative pole voltages of each battery cell to be tested.

[0033] In some embodiments, the path switching circuit further comprises: a multiplexing channel;

[0034] The input end of the insulation test channel and the input end of the voltage test channel are both connected to the test end corresponding to the positive electrode of the battery cell to be tested through the multiplexing channel at the same time.

[0035] In the technical solution of the embodiment of the present application, a multiplexing channel is further provided in the path switching circuit, so that insulation detection and voltage detection of the battery cell to be tested can be simultaneously achieved through the connection of the multiplexing channel, thereby improving detection efficiency.

[0036] In some embodiments, the detection device further comprises: a conduction detection device, and the path switching circuit further comprises: a conduction test channel;

[0037] The input end of the conduction test channel is connected to the second test end corresponding to the positive electrode of each battery cell to be tested through the multiplexing channel, the input end of the conduction test channel is also connected to the second test end corresponding to the negative electrode of each battery cell to be tested, and the output end of the conduction test channel is connected to the conduction detection device;

[0038] The conduction detection device is used to obtain the conduction detection result of the battery cell to be tested when the conduction test channel is connected.

[0039] In the technical solution of the embodiment of the present application, a conduction detection device and a corresponding conduction test channel are also provided in the detection circuit, so that a conduction test can be performed between the positive and negative poles of the battery cell to be tested, and the voltage and conduction tests can be performed on the battery cell to be tested simultaneously, thereby shortening the test time of the battery cell to be tested.

[0040] In some embodiments, the conduction test channel includes: a first conduction test channel and a second conduction test channel;

[0041] The input end of the first conduction test channel is connected to the second test end corresponding to the positive electrode of each battery cell to be tested through the multiplexing channel, and the output end of the first conduction test channel is connected to the conduction detection device;

[0042] The input end of the second conduction test channel is connected to the second test end corresponding to the negative electrode of each battery cell to be tested, and the output end of the second conduction test channel is connected to the conduction detection device.

[0043] In the technical solution of the embodiment of the present application, a first conduction test channel and a second conduction test channel are set in the conduction test channel, the first conduction test channel is respectively connected to the test end corresponding to the positive pole of the battery cell to be tested, and the second conduction test channel is respectively connected to the test end corresponding to the negative pole of the battery cell to be tested, so that a conduction detection loop is formed between the first conduction test channel and the second conduction test channel and the positive and negative poles of the battery cell to be tested and the conduction detection equipment, thereby realizing automatic conduction detection of the battery cell to be tested.

[0044] In some embodiments, the path switching circuit further includes: a fifth switch array and a sixth switch array;

[0045] The fifth switch array is provided on the first conduction test channel, the input end of the fifth switch array is connected to the second test end corresponding to the positive electrode of each battery cell to be tested through the multiplexing channel, and the output end of the fifth switch array is connected to the conduction detection device;

[0046] The sixth switch array is provided on the second conduction test channel, the input end of the sixth switch array is connected to the second test end corresponding to the negative electrode of each battery cell to be tested, and the output end of the sixth switch array is connected to the conduction detection device;

[0047] The fifth switch array and the sixth switch array are used to close when performing a conduction test on the battery cell to be tested, connecting the second test end corresponding to the positive electrode of the battery cell to be tested with the conduction detection device and the second test end corresponding to the negative electrode of the battery cell to be tested with the conduction detection device.

[0048] In the technical solution of the embodiment of the present application, a fifth switch array and a sixth switch array are further provided in the path switching circuit, the fifth switch array is provided on the first conduction test channel, and the sixth switch array is provided on the second conduction test channel, so that they are closed when the conduction test is performed on the positive and negative poles of the battery cells to be tested, thereby realizing automated testing of the conduction of another group of positive and negative poles of each battery cell to be tested.

[0049] In some embodiments, the path switching circuit further includes: a seventh switch array;

[0050] The seventh switch array is provided on the multiplexing channel, the input end of the seventh switch array is connected to the test end corresponding to the positive electrode of each battery cell to be tested, and the output end of the seventh switch array is respectively connected to the input end of the insulation test channel, the input end of the voltage test channel, and the input end of the conduction test channel;

[0051] The seventh switch array is used to close when testing the battery cell to be tested, so as to connect the test end corresponding to the positive electrode of the battery cell to be tested and the corresponding test channel.

[0052] In the technical solution of the embodiment of the present application, a seventh switch array is provided on the multiplexing channel, so that the conduction of the multiplexing channel is controlled by the seventh switch array, thereby improving the control effect.

[0053] In some embodiments, the path switching circuit further comprises: a detection switching channel, wherein the battery cells to be tested include a first group of battery cells to be tested and a second group of battery cells to be tested;

[0054] The input end of the detection switching channel is connected to the test end corresponding to the first group of battery cells to be tested and the test end corresponding to the second group of battery cells to be tested, respectively, and the output end of the detection switching channel is connected to the detection device;

[0055] The detection switching channel is used to connect the test terminals corresponding to the first group of battery cells to be tested with the detection device when the first group of battery cells to be tested is being tested;

[0056] The detection switching channel is further used to connect the test terminals corresponding to the second group of battery cells to be tested with the detection device when the second group of battery cells to be tested is being tested.

[0057] In the technical solution of the embodiment of the present application, the connection status between the test terminals corresponding to different groups of battery cells to be tested and the detection equipment can be switched through the detection switching channel, thereby improving the detection efficiency.

[0058] In some embodiments, the detection switching channel includes: a first detection switching channel and a second detection switching channel;

[0059] The input end of the first detection switching channel is connected to the test end corresponding to the first group of battery cells to be tested, and the output end of the first detection switching channel is connected to the detection device;

[0060] The input end of the second detection switching channel is connected to the test end corresponding to the second group of battery cells to be tested, and the output end of the second detection switching channel is connected to the detection device.

[0061] In the technical solution of the embodiment of the present application, a first detection switching channel and a second detection switching channel are set in the detection switching channel, and the input end of the first detection switching channel is connected to the test end corresponding to the first group of battery cells to be tested, and the output end is connected to the detection equipment, so that when the first group of battery cells to be tested are detected, the test end corresponding to the first group of battery cells to be tested and the detection equipment are switched and connected, and the input end of the second detection switching channel is connected to the test end corresponding to the second group of battery cells to be tested, and the output end is connected to the detection equipment, so that when the second group of battery cells to be tested are detected, the test end corresponding to the second group of battery cells to be tested and the detection equipment are switched and connected, thereby realizing automatic switching of the paths when different groups of battery cells to be tested are detected.

[0062] In some embodiments, the path switching circuit further includes: an eighth switch array and a ninth switch array;

[0063] The eighth switch array is provided on the first detection switching channel, the input end of the eighth switch array is connected to the test end corresponding to the first group of battery cells to be tested, and the output end of the eighth switch array is connected to the detection device;

[0064] The ninth switch array is provided on the second detection switching channel, the input end of the ninth switch array is connected to the test end corresponding to the second group of battery cells to be tested, and the output end of the ninth switch array is connected to the detection device;

[0065] The eighth switch array is configured to be closed when testing the first group of battery cells to be tested, so as to connect the test terminals corresponding to the first group of battery cells to be tested with the detection device;

[0066] The ninth switch array is configured to be closed when testing the second group of battery cells to be tested, so as to connect the test terminals corresponding to the second group of battery cells to be tested with the detection device.

[0067] In the technical solution of the embodiment of the present application, an eighth switch array and a ninth switch array are further provided in the path switching circuit, the eighth switch array is provided on the first detection switching channel, and the ninth switch array is provided on the second detection switching channel, so that different detection channels are switched to be connected when testing different groups of battery cells to be tested, thereby realizing the automatic testing of different groups of battery cells to be tested and switching them at will.

[0068] In some embodiments, the detection equipment includes: a first group of detection equipment and a second group of detection equipment;

[0069] The input end of the detection switching channel is connected to the test end corresponding to the first group of battery cells to be tested and the test end corresponding to the second group of battery cells to be tested, and the output end of the detection switching channel is connected to the first group of detection equipment and the second group of detection equipment respectively;

[0070] The detection switching channel is used to connect the test terminals corresponding to the first group of battery cells to be tested and the first group of detection equipment when the first group of battery cells to be tested is being tested;

[0071] The detection switching channel is further used to connect the test terminals corresponding to the second group of battery cells to be tested with the second group of detection equipment when the second group of battery cells to be tested is being tested.

[0072] In the technical solution of the embodiment of the present application, the detection equipment sets a first group of detection equipment and a second group of detection equipment, the input end of the detection switching channel is respectively connected to the test end corresponding to the first group of battery cells to be tested and the test end corresponding to the second group of battery cells to be tested, and the output end of the detection switching channel is respectively connected to the first group of detection equipment and the second group of detection equipment. Therefore, when testing different groups of battery cells to be tested, different detection circuits are switched through the detection switching channel, and multiple groups of battery cells to be tested are tested separately, thereby improving the detection efficiency.

[0073] In some embodiments, the detection signal includes: a first detection signal;

[0074] The detection switching channel is further used to connect the test terminals corresponding to the first group of battery cells to be tested and the first group of detection equipment according to the first detection signal;

[0075] The first group of detection devices is used to obtain detection results of the first group of battery cells to be tested when the test terminals corresponding to the first group of battery cells to be tested are connected to the first group of detection devices.

[0076] In the technical solution of the embodiment of the present application, the detection switching channel connects the test end corresponding to the first group of battery cells to be tested with the first group of detection equipment through the first detection signal, so that the first group of battery cells to be tested can be detected by the first group of detection equipment to obtain the detection results, thereby realizing rapid detection of the first group of battery cells to be tested.

[0077] In some embodiments, the detection signal further includes: a second detection signal;

[0078] The detection switching channel is further used to connect the test terminals corresponding to the second group of battery cells to be tested with the second group of detection equipment according to the second detection signal;

[0079] The second group of detection equipment is used to obtain the detection results of the second group of battery cells to be tested when the test ends corresponding to the second group of battery cells to be tested are connected to the second group of detection equipment.

[0080] In the technical solution of the embodiment of the present application, the detection switching channel can connect the test ends corresponding to the second group of battery cells to be tested with the second group of detection equipment according to the second detection signal, so that the second group of battery cells to be tested can be detected by the second group of detection equipment to obtain the detection results, thereby realizing rapid detection of the second group of battery cells to be tested.

[0081] In some embodiments, the detection circuit further includes a filtering circuit;

[0082] A first end of the filter circuit is connected to the detection device, and a second end of the filter circuit is connected to the path switching circuit;

[0083] The filtering circuit is used to perform filtering when the battery cell to be tested is being tested.

[0084] In the technical solution of the embodiment of the present application, a filtering circuit is further provided in the detection circuit, so as to perform filtering when detecting the battery cell to be tested, thereby reducing interference signals during detection.

[0085] In some embodiments, the detection circuit further includes: a protection circuit;

[0086] A first end of the protection circuit is connected to the detection device, and a second end of the protection circuit is connected to the path switching circuit;

[0087] The protection circuit is used to perform current limiting protection when the battery cell to be tested is being tested.

[0088] In the technical solution of the embodiment of the present application, a protection circuit is provided in the detection circuit to perform current limiting protection on various components when detecting the battery cell to be tested, thereby ensuring the safety of the circuit.

[0089] In a second aspect, the present application also provides a detection method, which includes:

[0090] Get detection signal;

[0091] Control the corresponding detection device to connect to the test terminal corresponding to the battery cell to be tested according to the detection signal;

[0092] The battery cell to be tested is tested according to the detection signal to obtain a detection result.

[0093] In the technical solution of the embodiment of the present application, by obtaining a detection signal, the corresponding detection device is controlled to be connected to the test end corresponding to the battery cell to be tested according to the corresponding detection signal, so that the corresponding detection device can be connected to the test end corresponding to the battery cell to be tested, and the battery cell to be tested can be tested to obtain the detection result. The corresponding detection device can be automatically switched according to the detection signal to detect the battery cell to be tested, thereby realizing automated testing of the battery cell to be tested.

[0094] In some embodiments, controlling the corresponding detection device to connect to the test terminal corresponding to the battery cell to be tested according to the detection signal includes:

[0095] Determine the connection relationship between the test terminal corresponding to the battery cell to be tested and the detection device according to the detection signal;

[0096] Determine the target switch array and the closing timing of the target switch array through the connection relationship;

[0097] The target switch array is closed by controlling the closing timing of the target switch array, so that the corresponding detection device is connected to the test end corresponding to the battery cell to be tested.

[0098] In the technical solution of the embodiment of the present application, the test end to which the battery cell to be tested needs to be connected and the detection equipment to be connected can be determined according to the specific detection signal, thereby determining their connection relationship, and determining the corresponding switch array and the closing timing of the switch array according to the connection relationship. The target switch array is controlled to be closed through the closing timing of the switch array, thereby quickly controlling the corresponding detection equipment to be connected to the test end corresponding to the battery cell to be tested, thereby further improving the detection efficiency.

[0099] In some embodiments, the detection signal includes: an insulation detection signal;

[0100] The controlling, according to the detection signal, of the corresponding detection device to connect to the test terminal corresponding to the battery cell to be tested comprises:

[0101] According to the insulation detection signal, the insulation detection device is controlled to connect to the test terminal corresponding to the positive electrode of each battery cell to be tested.

[0102] In the technical solution of the embodiment of the present application, the detection signal includes an insulation detection signal. When the detection signal obtained is an insulation detection signal, it can be determined that the detection device is an insulation detection device, and the insulation detection device is controlled to be connected to the test end corresponding to the positive pole of each battery cell to be tested, and the insulation detection device is quickly connected to the test end corresponding to the positive pole of the battery cell to be tested according to the insulation detection signal.

[0103] In some embodiments, the step of testing the battery cell to be tested according to the detection signal to obtain a detection result includes:

[0104] An insulation test is performed on the test end corresponding to the positive electrode of each battery cell to be tested according to the insulation test signal to obtain an insulation test result.

[0105] In the technical solution of the embodiment of the present application, insulation detection can be performed on the test end corresponding to the positive electrode of each battery cell to be tested according to the insulation detection signal, thereby realizing automatic insulation detection between the positive electrodes of each battery cell to be tested.

[0106] In some embodiments, the detection signal includes: a voltage detection signal and a conduction detection signal;

[0107] The controlling, according to the detection signal, of the corresponding detection device to connect to the test terminal corresponding to the battery cell to be tested comprises:

[0108] According to the voltage detection signal and the conduction detection signal, the voltage detection device is controlled to be connected to the first test end corresponding to the positive electrode of the battery cell to be tested and the first test end corresponding to the negative electrode of the battery cell to be tested, and according to the conduction detection signal, the conduction detection device is controlled to be connected to the second test end corresponding to the positive electrode of the battery cell to be tested and the second test end corresponding to the negative electrode of the battery cell to be tested.

[0109] In the technical solution of the embodiment of the present application, the detection signal includes a voltage detection signal and a conduction detection signal. When the detection signal obtained is a voltage detection signal and a conduction detection signal, it can be determined that the detection device is a voltage detection device and a conduction detection device, so as to control the voltage detection device and the conduction detection device to be connected to the positive and negative poles corresponding to the battery cell to be tested respectively, and quickly connect the voltage detection device to the test end corresponding to the positive and negative poles of the battery cell to be tested and the conduction detection device to the test end corresponding to another group of positive and negative poles of the battery cell to be tested according to the voltage detection signal and the conduction detection signal.

[0110] In some embodiments, the step of testing the battery cell to be tested according to the detection signal to obtain a detection result includes:

[0111] The voltage detection and the conduction detection are performed on the battery cell to be tested according to the voltage detection signal and the conduction detection signal to obtain voltage and conduction detection results.

[0112] In the technical solution of the embodiment of the present application, voltage detection and conduction detection can be performed synchronously on the test ends corresponding to different positive and negative poles of each battery cell to be tested according to the voltage detection signal and the conduction detection signal, thereby realizing synchronization of voltage and conduction testing of the battery cell to be tested and shortening the test time. BRIEF DESCRIPTION OF THE DRAWINGS

[0113] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0114] FIG1 is a schematic structural diagram of an embodiment of a detection circuit proposed in an embodiment of the present application;

[0115] FIG2 is another structural diagram of an embodiment of a detection circuit proposed in an embodiment of the present application;

[0116] 3a-3d are schematic structural diagrams showing the connection between an insulation detection device and a battery cell to be tested according to an embodiment of a detection circuit according to an embodiment of the present application;

[0117] FIG4 is another structural diagram of the connection between the insulation detection device of the detection circuit embodiment of the present application and the battery cell to be tested;

[0118] FIG5 is a schematic structural diagram of the connection between a voltage detection device and a battery cell to be tested according to an embodiment of a detection circuit according to an embodiment of the present application;

[0119] FIG6 is another structural diagram of the connection between the voltage detection device and the battery cell to be tested in an embodiment of the detection circuit according to an embodiment of the present application;

[0120] FIG7 is another structural diagram of the connection between the voltage detection device and the battery cell to be tested in an embodiment of the detection circuit according to an embodiment of the present application;

[0121] FIG8 is another structural diagram of an embodiment of a detection circuit proposed in an embodiment of the present application;

[0122] FIG9 is another structural diagram of an embodiment of a detection circuit proposed in an embodiment of the present application;

[0123] FIG10 is another structural diagram of the connection between the voltage detection device and the conduction detection device of the detection circuit according to an embodiment of the present application and a battery cell to be tested;

[0124] FIG11 is another structural diagram of an embodiment of a detection circuit proposed in an embodiment of the present application;

[0125] FIG12 is another structural diagram of an embodiment of a detection circuit proposed in an embodiment of the present application;

[0126] FIG13 is another structural diagram of an embodiment of a detection circuit proposed in an embodiment of the present application;

[0127] FIG14 is a schematic diagram of the overall structure of an embodiment of a detection circuit proposed in an embodiment of the present application;

[0128] FIG15 is a flow chart of an embodiment of the detection method proposed in the present application.

[0129] The reference numerals in the specific embodiments are as follows: Detection circuit 1, battery cell to be tested 2, test terminal 3; Detection device 10, path switching circuit 11, filter circuit 12, protection circuit 13; Insulation detection device 101, voltage detection device 102, conduction detection device 103; Insulation test channel 111, voltage test channel 112, multiplexing channel 113, conduction test channel 114; First insulation test channel 1111, second insulation test channel 1112, first voltage test channel 1121, second voltage test channel 1122, first conduction test channel 1141, second conduction test channel 1142; First to ninth switch arrays K1-K9, first switch K11, second switch K21, third switch K31, fourth switch K41, fifth switch K42, sixth switch K43, seventh switch K51, eighth switch K61, ninth switch K62, tenth switch K63, eleventh switch K71, twelfth switch K71, thirteenth switch K73, fourteenth switch K74, fifteenth switch K81, sixteenth switch K82, seventeenth switch K83, eighteenth switch K84, nineteenth switch K91, twentieth switch K92, twenty-first switch K93, twenty-second switch K94, twenty-third switch K12, twenty-fourth switch K22; first group of battery cells to be tested A1, second group of battery cells to be tested B1; first battery cell to be tested 21, second group of battery cells to be tested 22; test terminals 31a / 31b corresponding to the positive electrode, and test terminal 32c corresponding to the negative electrode; The positive pole corresponds to the first test terminal 31a1, the positive pole corresponds to the second test terminal 31a2, the negative pole corresponds to the first test terminal 32c1, and the negative pole corresponds to the second test terminal 32c2.

[0130] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0131] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0132] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0133] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0134] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0135] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0136] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0137] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of 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 embodiments of the present application.

[0138] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0139] At present, in the actual production process of batteries, different battery product types may have two types of positive and negative poles, and the batteries need to be tested.

[0140] When testing batteries, the existing solution is to manually test the battery by manually switching the positive and negative probes of the voltage tester to connect to the positive pole of the battery's corresponding test end to test the insulation between the positive poles of the battery, and then touching the multimeter probes to the positive and negative poles of the battery's corresponding test end to test the battery voltage. Manually testing the battery insulation and voltage carries the risk of missed tests and the testing process cannot be automated.

[0141] In order to solve the above-mentioned defects, the invention of this application is as follows:

[0142] By designing a detection circuit, a battery cell consists of a positive electrode and a negative electrode, each electrode corresponds to two test terminals, and each battery cell corresponds to four test terminals, which are connected to the corresponding test terminals through different test circuits. A path switching circuit is also set on the test circuit, and the output end of the path switching circuit is connected to multiple detection devices, so that the battery cell is automatically detected through the detection circuit. The path switching circuit can switch different detection devices to connect with the test terminals corresponding to the battery cell, thereby realizing different types of detection of battery cells.

[0143] The detection circuit disclosed in the embodiments of the present application can be used to detect battery cells or detect electrical devices that use batteries as power sources, as well as detect various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery-powered vehicles, electric cars, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0144] Based on the above considerations, in order to improve the automated detection of battery cells, after in-depth research, a detection circuit and method are proposed, which are suitable for various detection scenarios during the actual use of batteries.

[0145] In order to better understand the embodiments of the present application, the detection circuit and method provided according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0146] Please refer to FIG. 1 , which is a schematic diagram of the structure of a detection circuit provided in some embodiments of the present application.

[0147] In some embodiments of the present application, the detection circuit 1 includes multiple detection devices 10 and multiple path switching circuits 11, the input end of each path switching circuit 11 is respectively connected to a different test circuit, each test circuit is respectively connected to the test end 2 corresponding to the battery cell 2 to be tested, and the output end of each path switching circuit 11 is respectively connected to multiple detection devices 10.

[0148] It should be noted that the detection circuit is provided with multiple detection devices 10, and the types of the detection devices 10 can be the same or different. For example, the detection device 10 can include a voltage detection device, a current detection device, an insulation detection device, a power detection device, a conduction detection device, etc., and can also be a device of other detection types, which is not limited in this embodiment. The detection device 10 can also be multiple identical detection devices, for example, the detection devices 10 can all be voltage detection devices or all be insulation detection devices, etc., which is not limited in this embodiment. The number of detection devices 10 can be set according to specific detection requirements and can also be set according to the number of battery cells to be tested.

[0149] The path switching circuit 11 can correspond one-to-one to the detection device 10. The input end of the path switching circuit 11 is respectively connected to different test circuits, and each test circuit is respectively connected to the test end 2 corresponding to the battery cell 2 to be tested. The output end of the path switching circuit 11 is respectively connected to multiple detection devices 10. The path switching circuit 11 can switch the connectivity between the detection device 10 and the test end corresponding to the battery cell 2 to be tested.

[0150] There may be multiple battery cells 2 to be tested. The input end of each path switching circuit 11 may be connected to the same battery cell 2 to be tested via a test line. The input end of each path switching circuit 11 may also be connected to different battery cells 2 to be tested via a test line.

[0151] The battery cell 2 to be tested may be placed on a probe board on which a plurality of probes are placed. The probes contact the battery cell 20 to be tested, thereby forming a detection loop.

[0152] The test circuit can be arranged according to the function of the detection device 10. For example, if the detection device 10 includes an insulation detection device and a voltage detection device, the test circuit includes an insulation test circuit and a voltage test circuit. One end of the insulation test circuit is connected to the test end 3 corresponding to the battery cell 2 to be tested, and the other end of the insulation test circuit is connected to the insulation detection device. One end of the voltage test circuit is connected to the test end 3 corresponding to the battery cell 2 to be tested, and the other end of the voltage test circuit is connected to the voltage detection device.

[0153] It should be understood that the path switching circuit 11 is used to connect the detection device 10 corresponding to the detection signal and the test terminal 3 corresponding to the battery cell 2 to be tested according to the detection signal; the detection device 10 is used to obtain the detection result of the battery cell 2 to be tested.

[0154] The detection signal can be determined according to the detection requirements. The detection signal may include a voltage detection signal, an insulation detection signal, a conduction detection signal or a circuit switching detection signal, etc. For example, if the detection signal is a voltage detection signal, the path switching circuit 11 can connect the voltage detection device and the test end 3 corresponding to the battery cell 2 to be tested according to the voltage detection signal.

[0155] As an example, when the detection device 10 is connected to the test terminal 3 corresponding to the battery cell 2 to be tested, it can detect the battery cell 2 to be tested and obtain the detection result of the battery cell 2 to be tested.

[0156] In this embodiment, multiple detection devices 10 and multiple path switching circuits 11 are set in the detection circuit 1, the input end of the path switching circuit 11 is respectively connected to different test circuits, each test circuit is respectively connected to the test end 3 corresponding to the battery cell 2 to be tested, and the output end of each path switching circuit 11 is respectively connected to multiple detection devices 10; the path switching circuit 11 is used to connect the detection device 10 corresponding to the detection signal and the test end 3 corresponding to the battery cell 2 to be tested according to the detection signal; the detection device 10 is used to obtain the detection result of the battery cell 2 to be tested, and can automatically switch the corresponding detection device 10 to detect the battery cell 2 to be tested according to the detection signal, thereby realizing automated testing of the battery cell 2 to be tested.

[0157] In some embodiments of the present application, the detection devices 10 may be provided in multiple types, so that different types of detections can be performed on the battery cells 2 to be tested by using different types of detection devices 10 .

[0158] 2 , the detection device 10 includes an insulation detection device 101 and a voltage detection device 102 . There are multiple battery cells 2 to be tested, and the path switching circuit 11 includes: an insulation test channel 111 and a voltage test channel 112 . The input end of the insulation test channel 111 is respectively connected to the test ends 31 corresponding to the positive poles of the multiple battery cells 2 to be tested, and the output end of the insulation test channel 111 is connected to the insulation detection device 101 . The input end of the voltage test channel 112 is respectively connected to the test end 31 corresponding to the positive pole of each battery cell 2 to be tested and the test end 32 corresponding to the negative pole of each battery cell 2 to be tested, and the output end of the voltage test channel 112 is connected to the voltage detection device 102 .

[0159] It should be noted that the number of insulation detection devices 101 and voltage detection devices 102 can be set to one or more respectively, and this embodiment does not limit this. This embodiment is explained by taking the example of setting one insulation detection device 101 and one voltage detection device 102.

[0160] There are multiple battery cells 2 to be tested, and the path switching circuit 11 includes an insulation test channel 111 and a voltage test channel 112. The input end of the insulation test channel 111 is respectively connected to the test end 31 corresponding to the positive poles of the multiple battery cells 2 to be tested, and the output end of the insulation test channel 111 is connected to the insulation detection device 10. The insulation detection device 101 can test the insulation between the positive poles of the multiple battery cells 2 to be tested through the insulation test channel 111.

[0161] The input end of the voltage test channel 112 is respectively connected to the test end 31 corresponding to the positive pole of each battery cell 2 to be tested and the test end 32 corresponding to the negative pole of the battery cell 2 to be tested, and the output end of the voltage test channel 112 is connected to the voltage detection device 102. The voltage detection device 102 can perform voltage testing on the inside of each battery cell 2 to be tested through the voltage test channel 112.

[0162] As an example, the insulation detection device 101 is used to obtain the insulation detection result of the battery cell 2 to be tested when the insulation test channel 111 is connected; the voltage detection device 102 is used to obtain the voltage detection result of the battery cell 2 to be tested when the voltage test channel 112 is connected.

[0163] The insulation testing device 101 can be a device for performing insulation testing on the battery cell 2 to be tested, such as an insulation tester, or other devices capable of performing insulation testing. The insulation tester can be a dielectric strength tester or a withstand voltage tester, etc. The voltage testing device 102 can be a device for performing voltage testing on the battery cell 2 to be tested, such as a voltage tester, or other devices capable of performing voltage testing, such as a multimeter.

[0164] The connectivity between the insulation test channel 111 and the voltage test channel 112 can be switched. For example, if a voltage test is required on the battery cell 2 to be tested, the voltage test channel 112 connects the test terminals corresponding to the positive and negative poles of the battery cell 2 to be tested and the voltage detection device 102. At this time, the insulation test channel 111 is in a disconnected state. For example, if an insulation test is required on the battery cell to be tested, the insulation test channel 111 connects the test terminals corresponding to the positive poles of each battery cell 2 to be tested and the insulation detection device 101. At this time, the voltage test channel 112 is in a disconnected state. The connectivity between the insulation test channel 111 and the voltage test channel 112 can be controlled by a switch or directly by a line.

[0165] In the technical solution of the embodiment of the present application, the detection device 10 is set as an insulation detection device 101 and a voltage detection device 102. Different detection devices 10 are connected to corresponding test channels. When the corresponding test channels are connected, the corresponding detection device 10 can detect the battery cell 2 to be tested and obtain the test results. The voltage and insulation of the battery cell 2 to be tested can be detected separately to meet the different detection types of the battery cell 2 to be tested and expand the detection range of the battery cell 2 to be tested.

[0166] It can be understood that when performing insulation testing on the battery cell 2 to be tested, what is tested is the insulation condition between the test ends corresponding to the positive poles of at least two battery cells 2 to be tested. Therefore, the number of insulation test channels 111 can be set according to the number of tests on the battery cells 2 to be tested. For example, the battery cell 2 to be tested can be two battery cells 2 to be tested, and each battery cell 2 to be tested is independent of each other. Then the number of insulation test channels 111 is set to two, which respectively correspond to the test ends corresponding to the positive poles of the battery cells 2 to be tested, thereby facilitating the separate control of the connectivity between the battery cell 2 to be tested and the insulation detection equipment 101.

[0167] Optionally, the insulation test channel 111 includes a first insulation test channel 1111 and a second insulation test channel 1112, and the multiple battery cells 2 to be tested include: a first battery cell to be tested 21 and a second battery cell to be tested 22; the first battery cell to be tested 21 and the second battery cell to be tested 22 are independent of each other, the input end of the first insulation test channel 1111 is connected to the test end 31 corresponding to the positive pole of the first battery cell to be tested 21, and the output end of the first insulation test channel 1111 is connected to the insulation detection device 101; the input end of the second insulation test channel 1112 is connected to the test end 31 corresponding to the positive pole of the second battery cell to be tested 22, and the output end of the second insulation test channel 1112 is connected to the insulation detection device 101.

[0168] As an example, the battery cell 2 to be tested includes a first battery cell to be tested 21 and a second battery cell to be tested 22. When the insulation test is performed on the first battery cell to be tested 21 and the second battery cell to be tested 22, the test end 31 corresponding to the positive pole of the first battery cell to be tested 21 and the test end 31 corresponding to the positive pole of the second battery cell to be tested 22 are respectively connected to the input end of the corresponding insulation test channel 111, and the insulation test channel 111 is divided into a first insulation test channel 1111 and a second insulation test channel 1112.

[0169] The first battery cell to be tested 21 and the second battery cell to be tested 22 are independent of each other and are not connected to each other. The test end 31 corresponding to the positive pole of the first battery cell to be tested 21 and the test end 31 corresponding to the positive pole of the second battery cell to be tested 22 each include two. The input end of the first insulating test channel 1111 can be connected to a certain test end 31a corresponding to the positive pole of the first battery cell to be tested 21, and can also be connected to all test ends 31 corresponding to the positive pole of the first battery cell to be tested 21. The input end of the second insulating test channel 1112 can be connected to a certain test end 31b corresponding to the positive pole of the second battery cell to be tested 22, and can also be connected to all test ends 31 corresponding to the positive pole of the second battery cell to be tested 22.

[0170] As shown in Figures 3a-3d, in Figure 3a, the first test terminal 31a1 corresponding to the positive electrode of the first battery cell to be tested 21 is connected to the input end of the first insulation test channel 1111, and the first test terminal 31b1 corresponding to the positive electrode of the second battery cell to be tested 22 is connected to the input end of the second insulation test channel 1112. In Figure 3b, the second test terminal 31a2 corresponding to the positive electrode of the first battery cell to be tested 21 is connected to the input end of the first insulation test channel 1111, and the first test terminal 31b1 corresponding to the positive electrode of the second battery cell to be tested 22 is connected to the input end of the second insulation test channel 1112. In Figure 3c, the first test terminal 31a1 corresponding to the positive electrode of the first battery cell to be tested 21 is connected to the input end of the first insulation test channel 1111, and the second test terminal 31b2 corresponding to the positive electrode of the second battery cell to be tested 22 is connected to the input end of the second insulation test channel 1112. 3d , the second test terminal 31a2 corresponding to the positive electrode of the first battery cell 21 to be tested is connected to the input end of the first insulation test channel 1111 , and the second test terminal 31b2 corresponding to the positive electrode of the second battery cell 22 to be tested is connected to the input end of the second insulation test channel 1112 .

[0171] The input end of the first insulation test channel 1111 can also be connected to all test terminals 31 corresponding to the positive electrode of the first battery cell 21 to be tested. To facilitate switching during testing, a switch can be provided on the first insulation test channel 1111 to switch the connection between the input end of the first insulation test channel 1111 and the first test terminal 31a1 or the second test terminal 31a2 corresponding to the positive electrode of the first battery cell 21 to be tested. The input end of the second insulation test channel 1112 can also be connected to all test terminals 31 corresponding to the positive electrode of the second battery cell 22 to be tested. To facilitate switching during testing, a switch can be provided on the second insulation test channel 1112 to switch the connection between the input end of the second insulation test channel 1112 and the first test terminal 31b1 or the second test terminal 31b2 corresponding to the positive electrode of the second battery cell 22 to be tested. This allows the insulation test electrical circuit between the positive electrodes of the first battery cell 21 to be tested and the second battery cell 22 to be compatible with situations where the positive electrodes are different.

[0172] In the technical solution of the embodiment of the present application, when the insulation test result is obtained by performing insulation test on the battery cell 2 to be tested by the insulation detection equipment 101, the insulation test channel 111 is divided into a first insulation test channel 1111 and a second insulation test channel 1112, so as to perform insulation test on the positive pole of the first battery cell 21 to be tested and the positive pole of the second battery cell 22 to be tested respectively. Compared with the problem of missed test in manual test of the insulation between the positive poles of each battery cell 2 to be tested, the present application can realize self-test of the insulation test circuit during detection, thereby improving the accuracy and completeness of the detection.

[0173] Optionally, in order to facilitate channel switching of the insulation test channel 111 , a switch array may be provided on the first insulation test channel 1111 and the second insulation test channel 1112 , respectively, so as to switch the connection channels through the switch array.

[0174] In some embodiments, as shown in FIG4 , the path switching circuit 11 further includes: a first switch array K1 and a second switch array K2 ;

[0175] The first switch array K1 is provided on the first insulation test channel 1111 , the input end of the first switch array K1 is connected to the test end 311 corresponding to the positive electrode of the first battery cell 21 to be tested, and the output end of the first switch array K1 is connected to the insulation detection device 101 ;

[0176] The second switch array K2 is provided on the second insulation test channel 1112 . The input end of the second switch array K2 is connected to the test end 311 corresponding to the positive electrode of the second battery cell 22 to be tested. The output end of the second switch array K2 is connected to the insulation detection device 101 .

[0177] It should be noted that the number of switches in the first switch array K1 may include two or more, and the number of switches in the second switch array K2 may include two or more. The first switch array K1 is arranged on the first insulation test channel 1111, and the input end of the first switch array K1 can be connected to the first test end 31a1 and the second test end 31a2 corresponding to the positive pole of the first battery cell 21 to be tested, respectively. The output end of the first switch array K1 is connected to the insulation detection device 101. The first switch array K1 can switch the first test end 31a1 corresponding to the positive pole of the first battery cell 21 to be tested to be connected to the insulation detection device 101, and the first switch array K1 can also switch the second test end 31a2 corresponding to the positive pole of the first battery cell 21 to be tested to be connected to the insulation detection device 101.

[0178] The second switch array K2 is arranged on the first insulation test channel 1112. The input end of the second switch array K2 can be connected to the first test end 31b1 and the second test end 31b2 corresponding to the positive pole of the second battery cell 22 to be tested, respectively. The output end of the second switch array K2 is connected to the insulation detection equipment 101. The second switch array K2 can switch the first test end 31b1 corresponding to the positive pole of the second battery cell 22 to be tested to be connected to the insulation detection equipment 101. The second switch array K2 can also switch the second test end 31b2 corresponding to the positive pole of the second battery cell 22 to be tested to be connected to the insulation detection equipment 101.

[0179] It can be understood that the first switch array K1 and the second switch array K2 are used to close when performing insulation testing on the first battery cell to be tested 21 and the second battery cell to be tested 22, and at the same time connect the test end 31 corresponding to the positive pole of the first battery cell to be tested 21 with the insulation detection equipment 101 and the test end 31 corresponding to the positive pole of the second battery cell to be tested 22 with the insulation detection equipment 101.

[0180] The first switch array K1 is configured to close when performing an insulation test on the first battery cell 21 to be tested, connecting the test terminal 31 corresponding to the positive electrode of the first battery cell 21 to be tested with the insulation testing device 101. The first switch array K1 is also configured to switch the circuit loop between the first test terminal 31a1 and the second test terminal 31a2 corresponding to the positive electrode of the first battery cell 21 to be tested and the insulation testing device 101.

[0181] The second switch array K2 is configured to close when performing an insulation test on the second battery cell 22 to be tested, connecting the test terminal 31 corresponding to the positive electrode of the second battery cell 22 to be tested with the insulation testing device 101. The second switch array K2 is also configured to switch the circuit loop between the second test terminal 31b1 and the second test terminal 31b2 corresponding to the positive electrode of the second battery cell 22 to be tested and the insulation testing device 101.

[0182] The first battery cell 21 to be tested and the second battery cell 22 to be tested are subjected to insulation tests simultaneously, and the first switch array K1 and the second switch array K2 are closed simultaneously, thereby performing insulation tests on the positive electrodes of the first battery cell 21 to be tested and the second battery cell 22 to be tested.

[0183] In the technical solution of the embodiment of the present application, a first switch array K1 and a second switch array K2 are set in the path switching circuit 11, the first switch array K1 is set on the first insulation test channel 1111, and the second switch array K2 is set on the second insulation test channel 1112, so that it is closed when the insulation test is performed on the positive electrode between the first battery cell to be tested 21 and the second battery cell to be tested 22, thereby realizing a loop compatible design of the insulation test between the positive electrodes of each battery cell to be tested 2.

[0184] It is understood that when performing voltage detection on the battery cells 2 to be tested, the voltage between the test terminal 31 corresponding to the positive electrode and the test terminal 32 corresponding to the negative electrode of each battery cell 2 to be tested is tested. Therefore, the voltage test channels 112 can be respectively set up with channels for the test terminal 31 corresponding to the positive electrode and channels for the test terminal 32 corresponding to the negative electrode. For example, when performing voltage detection on the first battery cell 21 to be tested among the battery cells 2 to be tested, the voltage test channels 112 can be respectively set up with the test terminal 31 corresponding to the positive electrode and the test terminal 32 corresponding to the negative electrode of the first battery cell 21 to be tested.

[0185] In some embodiments, as shown in FIG5 , the voltage test channel 112 includes a first voltage test channel 1121 and a second voltage test channel 1122 ;

[0186] The input end of the first voltage test channel 1121 is connected to the first test end 31a1 corresponding to the positive electrode of each battery cell 2 to be tested, and the output end of the first voltage test channel 1121 is connected to the voltage detection device 102;

[0187] An input end of the second voltage test channel 1122 is connected to the first test end 32 c 1 corresponding to the negative electrode of each battery cell 2 to be tested, and an output end of the second voltage test channel 1122 is connected to the voltage detection device 102 .

[0188] It should be noted that since there are two test terminals corresponding to the positive pole of the battery cell 2 to be tested and two test terminals corresponding to the negative pole of the battery cell 2 to be tested, when performing voltage detection, the voltage detection device 102 is connected to the output terminals of the first voltage test channel 1121 and the second voltage test channel 1122, the input terminal of the first voltage test channel 1121 is connected to the test terminal 31 corresponding to the positive pole in the battery cell 2 to be tested, and the input terminal of the second voltage test channel 1122 is connected to the test terminal 32 corresponding to the negative pole of the battery cell to be tested, thereby forming a voltage detection circuit.

[0189] When performing voltage detection on the first battery cell to be tested 21, the input end of the first voltage test channel 1121 can be connected to the first test end 31a1 corresponding to the positive pole of the first battery cell to be tested 21, and the input end of the second voltage test channel 1122 can be connected to the first test end 32c1 corresponding to the negative pole of the first battery cell to be tested 21.

[0190] In the technical solution of the embodiment of the present application, a first voltage test channel 1121 and a second voltage test channel 1122 are set in the voltage test channel 112, the first voltage test channel 1121 is respectively connected to the test terminal 3 corresponding to the positive pole of the battery cell 2 to be tested, and the second voltage test channel 1122 is respectively connected to the test terminal 3 corresponding to the negative pole of the battery cell 2 to be tested, thereby forming a voltage detection loop between the first voltage test channel 1121 and the second voltage test channel 1122 and the positive and negative poles of the battery cell 2 to be tested and the voltage detection device 102, thereby realizing automatic voltage detection of the battery cell 2 to be tested.

[0191] It should be noted that, in order to facilitate channel switching of the voltage test channel 112 , a switch array may be provided on the first voltage test channel 1121 and the second voltage test channel 1122 , respectively, so as to switch the voltage test channel 112 through the switch array.

[0192] In some embodiments, as shown in FIG6 , the path switching circuit 11 further includes: a third switch array K3 and a fourth switch array K4 ;

[0193] The third switch array K3 is provided on the first voltage test channel 1121 , the input end of the third switch array K3 is connected to the first test end 3 corresponding to the positive electrode of the battery cell 2 to be tested, and the output end of the third switch array K3 is connected to the voltage detection device 102 ;

[0194] The fourth switch array K4 is provided on the second voltage test channel 1122 . The input end of the fourth switch array K4 is connected to the second test end 3 corresponding to the negative electrode of the battery cell 2 to be tested. The output end of the fourth switch array K4 is connected to the voltage detection device 102 .

[0195] It is understood that the number of switches in the third switch array K3 and the fourth switch array K4 may include two or more. The third switch array K3 is provided on the first voltage test channel 1121, thereby connecting or disconnecting the circuit loop of the first voltage test channel 1121 according to the switching of the third switch array K3. The input end of the third switch array K3 is connected to the first test end 31a1 corresponding to the positive electrode of each battery cell 2 to be tested, and the output end of the third switch array K3 is connected to the voltage detection device 102.

[0196] The fourth switch array K4 is provided on the second voltage test channel 1122, thereby connecting or disconnecting the circuit loop of the second voltage test channel 1122 according to the switching of the fourth switch array K4. The input end of the fourth switch array K4 is connected to the first test terminal 32c1 corresponding to the negative electrode of each battery cell 2 to be tested, and the output end of the fourth switch array K4 is connected to the voltage detection device 102.

[0197] In some embodiments, the third switch array K3 and the fourth switch array K4 are used to close when performing a voltage test on the battery cell 2 to be tested, connecting the first test terminal 31a1 corresponding to the positive electrode of the battery cell 2 to be tested with the voltage detection device 102 and the second test terminal 32c1 corresponding to the negative electrode of the battery cell 2 to be tested with the voltage detection device 102.

[0198] Optionally, multiple switches can be set in the third switch array K3, so as to control the conduction of the first voltage test channel 1121 according to the switches. The switches can be transistors such as triodes and MOS tubes, or switching devices such as relays. Multiple switches can also be set in the fourth switch array K4. The number of switches in the third switch array K3 and the fourth switch array K4 can correspond one to one. The conduction of the second voltage test channel 1122 is controlled according to the switches. For example, if the current battery cell 2 to be tested is the first battery cell to be tested 21, then when the voltage test is performed on the first battery cell to be tested 21, the third switch array K3 and the fourth switch array K4 are both closed, connecting the first test end 31a1 corresponding to the positive pole of the first battery cell to be tested 21 with the voltage detection device 102, and the first test end 32c1 corresponding to the negative pole of the first battery cell to be tested 21 with the voltage testing device 102.

[0199] If the insulation test is performed on the battery cell 2 to be tested, the third switch array K3 and the fourth switch array K4 disconnect the corresponding first voltage test channel 1121 and the second voltage test channel 1122 .

[0200] When the voltage of the battery cell 2 to be tested is detected, the first switch array K1 and the second switch array K2 disconnect the corresponding first insulation test channel 1111 and second insulation test channel 1112 .

[0201] In the technical solution of the embodiment of the present application, a third switch array K3 and a fourth switch array K4 are further provided in the path switching circuit 11. The third switch array K3 is provided on the first voltage test channel 1121, and the fourth switch array K4 is provided on the second voltage test channel 1122. Thus, when the voltage test is performed on the positive and negative poles of the battery cells 2 to be tested, they are closed, thereby realizing automated testing of the positive and negative pole voltages of each battery cell 2 to be tested.

[0202] It should be noted that when the insulation detection device 101 is detecting the battery cell 2 to be tested, the insulation test channel 111 is connected to the test end 31a corresponding to the positive pole of the battery cell 2 to be tested. When the voltage detection device 102 is performing voltage detection on the battery cell 2 to be tested, the input end of the first voltage test channel 1121 in the voltage test channel 112 is also connected to the first test end 31a1 corresponding to the positive pole of the battery cell 2 to be tested. There are overlapping parts in the lines, and some lines can be reused to save resources.

[0203] In one embodiment, as shown in FIG7 , the path switching circuit 11 further includes a multiplexing channel 113 , through which the input end of the insulation test channel 111 and the input end of the voltage test channel 112 are simultaneously connected to the test end 31 a corresponding to the positive electrode of the battery cell 2 to be tested.

[0204] It should be noted that the output end of the multiplexing channel 113 can be connected to the input end of the insulation test channel 111 and the input end of the voltage test channel 112 at the same time, and the input end of the multiplexing channel 113 is connected to the first test end 31a1 corresponding to the positive electrode of the battery cell 2 to be tested.

[0205] In the technical solution of the embodiment of the present application, a multiplexing channel 113 is further provided in the path switching circuit 11 , so that insulation detection and voltage detection of the battery cell 2 to be tested can be simultaneously performed through the connection of the multiplexing channel 113 , thereby improving detection efficiency.

[0206] As an example, in addition to performing voltage detection on the battery cell 2 to be tested, another set of positive and negative electrodes of the battery cell 2 to be tested can be directly tested for conductivity, thereby completing the overall detection of the battery cell 2 to be tested. Therefore, the detection device 10 can also be provided with a device for performing conductivity detection on the battery cell 2 to be tested.

[0207] In some embodiments, as shown in FIG8 , the detection device 10 further includes: a conduction detection device 103 , and the path switching circuit 11 further includes: a conduction test channel 114 ;

[0208] The input end of the conduction test channel 114 is connected to the second test end 31a2 corresponding to the positive electrode of each battery cell 2 to be tested through the multiplexing channel 113. The input end of the conduction test channel 114 is also connected to the second test end 32c2 corresponding to the negative electrode of each battery cell 2 to be tested. The output end of the conduction test channel 114 is connected to the conduction detection device 103.

[0209] The conduction detection device 103 is used to obtain a conduction detection result of the battery cell 2 to be tested when the conduction test channel 114 is connected.

[0210] It should be noted that when voltage detection is performed on one group of positive and negative electrodes in the battery cell 2 to be tested, another group of positive and negative electrodes in the battery cell 2 to be tested can be additionally set up for conduction detection. The conduction detection device 103 can be a module for conducting conduction detection, or it can be a device such as a voltmeter that can detect circuit conduction, etc. This embodiment does not impose any restrictions on this.

[0211] The test channel corresponding to the conduction detection device 103 is the conduction test channel 114. For example, when a conduction test is performed on the first battery cell to be tested 21 in the battery cells to be tested 2, the input end of the conduction test channel 114 is respectively connected to the second test end 31a2 corresponding to the positive pole of the first battery cell to be tested 21 and the second test end 32c2 corresponding to the negative pole, and the output end of the conduction test channel 114 is connected to the conduction detection device 103, so that the signal output by the first battery cell to be tested 21 is transmitted to the conduction detection device 103, and the conduction test is performed on the first battery cell to be tested 21 through the conduction detection device 103.

[0212] By connecting the input ends of the insulation test channel 111, the voltage test channel 112 and the conduction test channel 114 to the test ends corresponding to the battery cell 2 to be tested through the multiplexing channel 113, one multiplexing channel 113 can be used to simultaneously perform insulation detection, voltage detection and conduction detection on the battery cell 2 to be tested, thereby realizing circuit reuse and saving design costs.

[0213] In the technical solution of the embodiment of the present application, a conduction detection device 103 and a corresponding conduction test channel 114 are also provided in the detection circuit 1, so that a conduction test can be performed between the positive and negative poles of the battery cell 2 to be tested, and the voltage and conduction tests can be performed on the battery cell 2 to be tested simultaneously, thereby shortening the test time of the battery cell 2 to be tested.

[0214] It will be appreciated that when conducting a continuity test on the battery cells 2 to be tested, the test is performed on the continuity between the test terminal 31 corresponding to the positive electrode and the test terminal 32 corresponding to the negative electrode of each battery cell 2 to be tested. Therefore, the continuity test channels 114 can be separately configured with channels for the test terminal 31 corresponding to the positive electrode and channels for the test terminal 32 corresponding to the negative electrode. For example, when conducting a continuity test on the first battery cell 21 to be tested, the continuity test channels 114 can be separately configured with the second test terminal 31a2 corresponding to the positive electrode and the test terminal 32c2 corresponding to the negative electrode of the first battery cell 21 to be tested, thereby enabling separate control of the corresponding test channels.

[0215] As shown in FIG9 , in some embodiments, the conduction test channel 114 includes: a first conduction test channel 1141 and a second conduction test channel 1142 ;

[0216] The input end of the first conduction test channel 1141 is connected to the second test end 31a2 corresponding to the positive electrode of each battery cell 2 to be tested through the multiplexing channel 113, and the output end of the first conduction test channel 1141 is connected to the conduction detection device 103;

[0217] An input end of the second conduction test channel 1142 is connected to the second test end 32 c 2 corresponding to the negative electrode of each battery cell 2 to be tested, and an output end of the second conduction test channel 1142 is connected to the conduction detection device 103 .

[0218] It should be noted that, since the first test terminal 31a1 corresponding to the positive pole of the battery cell 2 to be tested and the first test terminal 32c1 corresponding to the negative pole of the battery cell 2 to be tested are both connected to the corresponding voltage test channel 112, the input end of the first conduction test channel 1141 can be set to be connected to the second test terminal 31a2 corresponding to the positive pole of each battery cell 2 to be tested, and the input end of the second conduction test channel 1142 can be connected to the second test terminal 32c2 corresponding to the negative pole of each battery cell 2 to be tested, thereby forming a conduction detection circuit.

[0219] For example, if the battery cell 2 to be tested is the first battery cell to be tested 21, when performing a conduction test on the first battery cell to be tested 21, the input end of the first conduction test channel 1141 can be connected to the second test end 31a2 corresponding to the positive pole of the first battery cell to be tested 21, and the input end of the second conduction test channel 1142 can be connected to the second test end 32c2 corresponding to the negative pole of the first battery cell to be tested 21.

[0220] In the technical solution of the embodiment of the present application, a first conduction test channel 1141 and a second conduction test channel 1142 are set in the conduction test channel 114, the first conduction test channel 1141 is connected to the test terminal 3 corresponding to the positive pole of the battery cell 2 to be tested through the reuse channel 113, and the second conduction test channel 1142 is connected to the test terminal 3 corresponding to the negative pole of the battery cell 2 to be tested, so that a conduction detection loop is formed between the first conduction test channel 1141 and the second conduction test channel 1142 and the positive and negative poles of the battery cell 2 to be tested and the conduction detection device 103, thereby realizing automatic conduction detection of the battery cell 2 to be tested.

[0221] Optionally, in order to facilitate channel switching of the conduction test channel 114 , a switch array may be provided on the first conduction test channel 1141 and the second conduction test channel 1142 , respectively, so as to switch the connection channel through the switch array.

[0222] In some embodiments, as shown in FIG10 , the path switching circuit 11 further includes: a fifth switch array K5 and a sixth switch array K6 ;

[0223] The fifth switch array K5 is provided on the first conduction test channel 1141. The input end of the fifth switch array K5 is connected to the second test end 31a2 corresponding to the positive electrode of each battery cell 2 to be tested through the multiplexing channel 113. The output end of the fifth switch array K5 is connected to the conduction detection device 103.

[0224] The sixth switch array K6 is provided on the second conduction test channel 1142 . The input end of the sixth switch array K6 is connected to the second test end 32 c 2 corresponding to the negative electrode of each battery cell 2 to be tested. The output end of the sixth switch array K6 is connected to the conduction detection device 103 .

[0225] It is understood that the number of switches in the fifth switch array K5 and the sixth switch array K6 may include two or more. The fifth switch array K5 is provided on the first conduction test channel 1141, thereby connecting or disconnecting the circuit loop of the first conduction test channel 1141 according to the switching of the fifth switch array K5. The input end of the fifth switch array K5 is connected to the second test end 31a2 corresponding to the positive electrode of each battery cell 2 to be tested, and the output end of the fifth switch array K5 is connected to the conduction detection device 103.

[0226] The sixth switch array K6 is provided on the second voltage test channel 1122, thereby connecting or disconnecting the circuit loop of the second voltage test channel 1122 according to the switching of the sixth switch array K6. The input end of the sixth switch array K6 is connected to the second test terminal 32c2 corresponding to the negative electrode of each battery cell 2 to be tested, and the output end of the sixth switch array K6 is connected to the conduction detection device 103.

[0227] The fifth switch array K5 and the sixth switch array K6 are used to close when performing a conduction test on the battery cell 2 to be tested, connecting the second test terminal 31a2 corresponding to the positive electrode of the battery cell 2 to be tested with the conduction detection device 103 and the second test terminal 32c2 corresponding to the negative electrode of the battery cell 2 to be tested with the conduction detection device 103.

[0228] Optionally, multiple switches may be provided in the fifth switch array K5, so as to control the conduction of the first voltage conduction test channel 1141 according to the switches. The switches may be transistors such as triodes and MOS tubes, or switching devices such as relays. Multiple switches may also be provided in the sixth switch array K6. The number of switches in the fifth switch array K5 and the sixth switch array K6 may correspond one to one. The conduction of the second conduction test channel 1142 is controlled according to the switches. For example, if the current battery cell 2 to be tested is the first battery cell to be tested 21, then when the conduction test is performed on the first battery cell to be tested 21, the fifth switch array K5 and the sixth switch array K6 are both closed, connecting the second test end 31a2 corresponding to the positive electrode of the first battery cell to be tested 21 with the conduction detection device 103, and the second test end 32c2 corresponding to the negative electrode of the first battery cell to be tested 21 with the voltage conduction device 103.

[0229] The first test terminal 31a1 corresponding to the positive electrode, the second test terminal 31a2 corresponding to the positive electrode, the first test terminal 32c1 corresponding to the negative electrode, and the second test terminal 32c2 corresponding to the negative electrode of the battery cell 2 to be tested are all connected to corresponding test channels, so that voltage detection and conduction detection can be performed on the battery cell to be tested at the same time. When the voltage and conduction detection are performed on the battery cell 2 to be tested, the third switch array K3 and the fourth switch array K4 are connected to the first voltage test channel 1121 and the second voltage test channel 1122, the fifth switch array K5 and the sixth switch array K6 are connected to the first conduction test channel 1141 and the second conduction test channel 1142, and at the same time, the first switch array K1 and the second switch array K2 disconnect the corresponding first insulation test channel 1111 and the second insulation test channel 1112.

[0230] In the technical solution of the embodiment of the present application, a fifth switch array K5 and a sixth switch array K6 are further provided in the path switching circuit 11. The fifth switch array K5 is provided on the first conduction test channel 1141, and the sixth switch array K6 is provided on the second conduction test channel 1142. Thus, when the conduction test is performed on the positive and negative electrodes of the battery cells 2 to be tested, they are closed, thereby realizing an automated test of the conduction of another group of positive and negative electrodes of each battery cell 2 to be tested.

[0231] During use, the multiplexing channel 113 may short-circuit due to frequent use. In order to more conveniently control the multiplexing channel 113, a switch can be set on the multiplexing channel 113, so that when a problem occurs, the multiplexing channel 113 can be directly controlled to be on or off by the switch.

[0232] In some embodiments, as shown in FIG11 , the path switching circuit 11 further includes: a seventh switch array K7 ;

[0233] The seventh switch array K7 is provided on the multiplexing channel 113. The input end of the seventh switch array K7 is connected to the test end 31a corresponding to the positive electrode of each battery cell 2 to be tested. The output end of the seventh switch array K7 is respectively connected to the input end of the insulation test channel 111, the input end of the voltage test channel 112, and the input end of the conduction test channel 114.

[0234] The seventh switch array K7 is used to be closed when testing the battery cell 2 to be tested, so as to connect the test terminal 31 a corresponding to the positive electrode of the battery cell 2 to be tested and the corresponding test channel.

[0235] In the technical solution of the embodiment of the present application, by providing the seventh switch array K7 on the multiplexing channel 113 , the conduction of the multiplexing channel 113 is controlled by the seventh switch array K7 , thereby improving the control effect.

[0236] It should be noted that, when testing the battery cells 2 to be tested, in order to improve the testing efficiency, the testing device 10 may be configured to test multiple groups of battery cells 2 to be tested, thereby improving the testing efficiency.

[0237] In some embodiments, the path switching circuit 11 further includes: a detection switching channel, the battery cells 2 to be tested include a first group of battery cells A1 to be tested and a second group of battery cells B1 to be tested;

[0238] It should be understood that the first group of battery cells to be tested A1 and the second group of battery cells to be tested B1 both include multiple battery cells to be tested 2, and the detection device 10 is connected to the test end 3 corresponding to each battery cell 2 to be tested in the first group of battery cells to be tested A1 through the detection switching channel, and the group detection device 10 is also connected to the test end 3 corresponding to each battery cell 2 to be tested in the second group of battery cells to be tested B1 through the detection switching channel.

[0239] The detection switching channel can connect the corresponding group of battery cells 2 to be tested with the detection device 10 when the corresponding group of battery cells 2 to be tested is being tested, and disconnect the remaining groups of battery cells 2 to be tested from the detection device 10 .

[0240] The input end of the detection switching channel is connected to the test end 3 corresponding to the first group of battery cells A1 to be tested and the test end 3 corresponding to the second group of battery cells B1 to be tested, and the output end of the detection switching channel is connected to the detection device 10;

[0241] A detection switching channel, used for connecting the test terminals corresponding to the first group of battery cells A1 to be tested to the detection device 10 when testing the first group of battery cells A1 to be tested;

[0242] The detection switching channel is further used to connect the test terminals corresponding to the second group of battery cells B1 to be tested with the detection device 10 when the second group of battery cells B1 to be tested is being tested.

[0243] In the technical solution of the embodiment of the present application, the connection status between the test terminals corresponding to different groups of battery cells to be tested and the detection equipment can be switched through the detection switching channel, thereby improving the detection efficiency.

[0244] In some embodiments, to improve the control effect, the detection switching channel includes: a first detection switching channel and a second detection switching channel;

[0245] The input end of the first detection switching channel is connected to the test end 3 corresponding to the first group of battery cells A1 to be tested, and the output end of the first detection switching channel is connected to the detection device 10; the input end of the second detection switching channel is connected to the test end 3 corresponding to the second group of battery cells B1 to be tested, and the output end of the second detection switching channel is connected to the detection device 10.

[0246] By setting corresponding detection switching channels on the circuit loops of different groups of battery cells 2 to be tested and the detection device 10 , free switching can be achieved according to the detection switching channels.

[0247] By setting a first detection switching channel and a second detection switching channel in the detection switching channel, and connecting the input end of the first detection switching channel to the test end 3 corresponding to the first group of battery cells to be tested A1, and the output end to the detection device 10, when the first group of battery cells to be tested A1 is detected, the test end 3 corresponding to the first group of battery cells to be tested A1 is switched to connect with the detection device 10, and the input end of the second detection switching channel is connected to the test end 3 corresponding to the second group of battery cells to be tested B1, and the output end is connected to the detection device 10, so that when the second group of battery cells to be tested B1 is detected, the test end 3 corresponding to the second group of battery cells to be tested B1 is switched to connect with the detection device 10, thereby realizing automatic switching of paths when detecting different groups of batteries to be tested.

[0248] In some embodiments, as shown in FIG12 , the path switching circuit 11 further includes: an eighth switch array K8 and a ninth switch array K9 ;

[0249] The eighth switch array K8 is provided on the first detection switching channel, the input end of the eighth switch array K8 is connected to the test end 3 corresponding to the first group of battery cells A1 to be tested, and the output end of the eighth switch array K8 is connected to the detection device 10;

[0250] The ninth switch array K9 is provided on the second detection switching channel, the input end of the ninth switch array K9 is connected to the test end 3 corresponding to the second group of battery cells B1 to be tested, and the output end of the ninth switch array K9 is connected to the detection device 10;

[0251] It is understood that the number of switches in the eighth switch array K8 and the ninth switch array K9 may include two or more. The eighth switch array K8 is provided on the first detection switching channel, thereby connecting or disconnecting the circuit loop of the first detection switching channel according to the switching of the eighth switch array K8. The input end of the first detection switching channel is connected to the test terminal 3 corresponding to the first group of battery cells A1 to be tested, and the output end of the first detection switching channel is connected to the testing device 10.

[0252] The ninth switch array K9 is provided on the second detection switching channel, thereby connecting or disconnecting the circuit loop of the second detection switching channel according to the switching of the ninth switch array K9. The input end of the ninth switch array K9 is connected to the test terminal 3 corresponding to the second group of battery cells B1 to be tested, and the output end of the ninth switch array K9 is connected to the testing device 10.

[0253] The eighth switch array K8 is used to close when testing the first group of battery cells A1 to be tested, connecting the test end 3 corresponding to the first group of battery cells A1 to be tested and the detection device 10; the ninth switch array K9 is used to close when testing the second group of battery cells B1 to be tested, connecting the test end 3 corresponding to the second group of battery cells B1 to be tested and the detection device 10.

[0254] Optionally, multiple switches can be set in the eighth switch array K8, so as to control the conduction of the first detection switching channel according to the switch. The switch can be a transistor such as a triode, a MOS tube, or a switching device such as a relay. Multiple switches can also be set in the eighth switch array K8. The number of switches in the eighth switch array K8 and the ninth switch array K9 can correspond one to one. The conduction of the second detection switching channel is controlled according to the switch. For example, if the current battery cell 2 to be tested is the first group of battery cells to be tested A1, then when the first group of battery cells to be tested A1 is tested, the eighth switch array K8 is closed to connect the test end 3 corresponding to the first group of battery cells to be tested A1 with the detection device 10.

[0255] In the technical solution of the embodiment of the present application, an eighth switch array K8 and an eighth switch array K8 are further provided in the path switching circuit 11, the eighth switch array K8 is provided on the first detection switching channel, and the eighth switch array K8 is provided on the second detection switching channel, so that different detection channels are switched to be connected when testing different groups of battery cells 2 to be tested, thereby realizing the automatic testing of different groups of battery cells 2 to be tested and arbitrary switching.

[0256] When a group of detection devices 10 are used to detect multiple groups of battery cells 2 to be tested, a detection switching channel must be used for detection switching. Frequent switching can easily lead to circuit failure. Therefore, corresponding detection devices 10 can be set on each group of battery cells 2 to be tested to avoid frequent switching.

[0257] In some embodiments, the detection device 10 includes: a first group of detection devices and a second group of detection devices.

[0258] It should be understood that the first group of detection equipment and the second group of detection equipment may include detection equipment of multiple detection types, for example, both include insulation detection equipment, voltage detection equipment, and conduction detection equipment, etc., and other types of detection equipment may be added according to detection requirements.

[0259] The input end of the detection switching channel is respectively connected to the test end corresponding to the first group of battery cells A1 to be tested and the test end corresponding to the second group of battery cells B1 to be tested, and the output end of the detection switching channel is respectively connected to the first group of detection equipment and the second group of detection equipment;

[0260] A detection switching channel, used for connecting the test terminals 3 corresponding to the first group of battery cells A1 to be tested to the first group of detection equipment when the first group of battery cells to be tested is being tested;

[0261] The detection switching channel is further used to connect the test terminals 3 corresponding to the second group of battery cells B1 to be tested with the second group of detection equipment when the second group of battery cells B1 to be tested is being tested.

[0262] It should be noted that if the first group of testing equipment needs to perform an insulation test on the first group of battery cells A1 to be tested, the insulation testing equipment 101 in the first group of testing equipment can be connected to the first group of battery cells A1 to be tested via a test switching channel. At this time, the second group of testing equipment can also perform insulation testing or other types of testing on the second group of battery cells B1 to be tested, and the second group of testing equipment can also be connected to the second group of battery cells B1 to be tested via a test switching channel. The first group of testing equipment and the second group of testing equipment can simultaneously perform the same or different types of testing on the first group of battery cells A1 to be tested and the second group of battery cells B1 to be tested.

[0263] In the technical solution of the embodiment of the present application, the detection equipment sets a first group of detection equipment and a second group of detection equipment, the input end of the detection switching channel is respectively connected to the test end 3 corresponding to the first group of battery cells A1 to be tested and the test end 3 corresponding to the second group of battery cells B1 to be tested, and the output end of the detection switching channel is respectively connected to the first group of detection equipment and the second group of detection equipment, so that when testing different groups of battery cells 2 to be tested, different detection circuits are switched through the detection switching channel, and multiple groups of battery cells 2 to be tested are tested separately, thereby improving the detection efficiency.

[0264] In some embodiments, the detection signal includes: a first detection signal;

[0265] The detection switching channel is further used to connect the test terminal 3 corresponding to the first group of battery cells A1 to be tested with the first group of detection equipment according to the first detection signal;

[0266] The first group of detection equipment is used to obtain the detection results of the first group of battery cells A1 to be tested when the test terminals 3 corresponding to the first group of battery cells A1 to be tested are connected to the first group of detection equipment.

[0267] It is understandable that a detection switching channel can also be set in the first group of detection equipment and the second group of detection equipment. When the first group of detection equipment is working, the detection switching channel disconnects the circuit loop between the second group of detection equipment and the corresponding battery cell 2 to be tested.

[0268] The first detection signal is a signal for the first group of detection equipment to work for detection. When the first group of detection signals is received, the detection switching channel connects the first group of battery cells A1 to be tested and the first group of detection equipment, so that the first group of detection equipment is used to detect the first group of battery cells A1 to be tested to obtain detection results. The detection results may include insulation detection results, voltage detection results, conduction detection results, etc. of the first group of battery cells A1 to be tested.

[0269] In the technical solution of the embodiment of the present application, the detection switching channel connects the test terminal 3 corresponding to the first group of battery cells A1 to be tested with the first group of detection equipment through the first detection signal, so that the first group of battery cells A1 to be tested can be detected by the first group of detection equipment to obtain the detection results, thereby realizing rapid detection of the first group of battery cells A1 to be tested.

[0270] In some embodiments, the detection signal further includes: a second detection signal;

[0271] The detection switching channel is further used to connect the test terminal 3 corresponding to the second group of battery cells B1 to be tested with the second group of detection equipment according to the second detection signal;

[0272] The second group of detection equipment is used to obtain the detection results of the second group of battery cells B1 to be tested when the test terminals 3 corresponding to the second group of battery cells B1 to be tested are connected to the second group of detection equipment.

[0273] It is understandable that when the second group of detection equipment is working, the detection switching channel disconnects the circuit loop between the first group of detection equipment and the corresponding battery cell 2 to be tested.

[0274] The second detection signal is a signal for the second group of detection equipment to work for detection. When the second group of detection signals is received, the detection switching channel connects the second group of battery cells B1 to be tested and the second group of detection equipment, so that the second group of detection equipment is used to detect the second group of battery cells B1 to be tested to obtain detection results. The detection results may include insulation detection results, voltage detection results, conduction detection results, etc. of the second group of battery cells B1 to be tested.

[0275] In the technical solution of the embodiment of the present application, the detection switching channel can connect the test end 3 corresponding to the second group of battery cells B1 to be tested with the second group of detection equipment according to the second detection signal, so that the second group of battery cells B1 to be tested can be detected by the second group of detection equipment to obtain the detection results, thereby realizing rapid detection of the second group of battery cells B1 to be tested.

[0276] It should be noted that when the detection device 10 is used to detect the battery cell 2 to be tested, certain interference signals will be generated to affect the detection results. Therefore, an anti-interference circuit can be additionally provided in the detection circuit 1 to improve the accuracy of the detection.

[0277] In some embodiments, as shown in FIG13 , the detection circuit 1 further includes a filter circuit 12 ;

[0278] A first end of the filter circuit 12 is connected to the detection device 10 , and a second end of the filter circuit 12 is connected to the path switching circuit 11 ; the filter circuit 12 is used for filtering when the battery cell 2 to be tested is being detected.

[0279] It should be noted that the filter circuit 12 can be a filter composed of one or more of capacitors, magnetic rings, inductors, resistors, transistors, and operational amplifiers, or can be other modules that can achieve filtering, which is not limited in this embodiment.

[0280] In the technical solution of the embodiment of the present application, a filter circuit 12 is further provided in the detection circuit 1 so as to perform filtering when detecting the battery cell 2 to be tested, thereby reducing interference signals during detection.

[0281] It should be noted that when the testing device 10 is used to test the battery cell 2 to be tested, the circuit may be short-circuited due to the excessive voltage of the battery cell 2 to be tested. Therefore, a protection circuit needs to be provided in the testing circuit to protect the circuit and the components in the circuit.

[0282] In some embodiments, the detection circuit 1 further includes: a protection circuit 13;

[0283] A first end of the protection circuit 13 is connected to the detection device 10 , and a second end of the protection circuit 13 is connected to the path switching circuit 11 ; the protection circuit 13 is used for current limiting protection when the battery cell 2 to be tested is being tested.

[0284] It should be noted that the protection circuit 13 may be an overcurrent protection device composed of components such as resistors, diodes, etc. The protection circuit 13 performs overcurrent protection, thereby improving the safety of the entire circuit.

[0285] In the technical solution of the embodiment of the present application, a protection circuit 13 is provided in the detection circuit 1 to perform current limiting protection on various components when detecting the battery cell 2 to be tested, thereby ensuring the safety of the circuit.

[0286] In a specific implementation, as shown in FIG14 , the battery cells to be tested 2 include a first group of battery cells to be tested A1 and a second group of battery cells to be tested A2. The first group of battery cells to be tested A1 includes a first battery cell to be tested 21 and a second battery cell to be tested 22. The detection device 10 includes an insulation detection device 101, a voltage detection device 102, and a conduction detection device 103. The insulation detection device 101 may be a withstand voltage tester, the voltage detection device 102 may be a multimeter, and the conduction detection device 103 may be a conduction detection module. The filter circuit 12 may include a magnetic ring, and the protection circuit 13 may include a current-limiting resistor. On the detection channel of the first group of battery cells to be tested A1, the first switch array K1 may include a first switch K11, the second switch array K2 may include a second switch K21, the third switch array K3 may include a third switch K31, and the fourth switch array K4 may include a fourth switch K41, a fifth switch K42, and a sixth switch K43. The fifth switch array K5 may include a seventh switch K51, and the sixth switch array K6 may include an eighth switch K61, a ninth switch K62, and a tenth switch K63. The seventh switch array K7 may include an eleventh switch K71, a twelfth switch K72, a thirteenth switch K73, and a fourteenth switch K74. The eighth switch array K8 may include a fifteenth switch K81, a sixteenth switch K82, a seventeenth switch K83, and an eighteenth switch K84. The ninth switch array K9 may include a nineteenth switch K91, a twentieth switch K92, a twenty-first switch K93, and a twenty-second switch K94. The positive and negative poles of the battery cells 2 to be tested can be repositioned. To accommodate testing of different positions of the positive poles of different battery cells, a twenty-third switch K12 may be additionally provided in the first switch array K1, and a twenty-fourth switch K22 may be additionally provided in the second switch array K2, thereby switching between circuit test channels for different positive poles.

[0287] The input ends of the eleventh switch K71 and the twelfth switch K72 are respectively connected to the first test end 31a1 corresponding to the positive electrode of the first battery cell 21 to be tested and the second test end 31a2 corresponding to the positive electrode of the first battery cell 21 to be tested. The output end of the eleventh switch K71 is connected to the fifteenth switch K81. The output end of the fifteenth switch K81 is respectively connected to the first switch K11 in the insulation test channel 111 and the third switch K31 in the voltage test channel 112. The insulation test channel 111 and the voltage test channel 112 share a switching switch, namely, the eleventh switch K71.

[0288] The output end of the twelfth switch K72 is connected to the sixteenth switch K82. The output end of the sixteenth switch K82 is respectively connected to the second switch K21 in the insulation test channel 111 and the seventh switch K51 in the conduction test channel 114. The insulation test channel 111 and the conduction test channel 114 share a switching switch, namely, the twelfth switch K72.

[0289] The input ends of the thirteenth switch K73 and the fourteenth switch K74 are respectively connected to the first test end 31b1 corresponding to the positive electrode of the second battery cell 22 to be tested and the second test end 31b2 corresponding to the positive electrode of the second battery cell 22 to be tested. The output end of the thirteenth switch K73 is connected to the fifteenth switch K81. The output end of the fifteenth switch K81 is respectively connected to the first switch K11 in the insulation test channel 111 and the third switch K31 in the voltage test channel 112. The insulation test channel 111 and the voltage test channel 112 share a switching switch, namely the thirteenth switch K73.

[0290] The output end of the fourteenth switch K74 is connected to the sixteenth switch K82. The output end of the sixteenth switch K82 is respectively connected to the second switch K21 in the insulation test channel 111 and the seventh switch K51 in the conduction test channel 114. The insulation test channel 111 and the conduction test channel 114 share a switching switch, namely, the fourteenth switch K74.

[0291] The output ends of the first switch K11 and the twenty-third switch K12 are both connected to the high-voltage output end of the withstand voltage tester. The input end of the first switch K11 is connected to the output end of the fifteenth switch K81 via a current-limiting resistor. The input end of the fifteenth switch K81 is connected to the output ends of the eleventh switch K71 and the output end of the thirteenth switch K73, respectively. The input end of the eleventh switch K71 is connected to the first test end 31a1 corresponding to the positive electrode of the first battery cell to be tested 21, and the input end of the thirteenth switch K73 is connected to the first test end 31b1 corresponding to the positive electrode of the second battery cell to be tested 22. The input end of the twenty-third switch K12 is connected to the output end of the seventeenth switch K83 via a current-limiting resistor. The input end of the seventeenth switch K83 is connected to the output ends of the ninth switch K62 and the output end of the tenth switch K63, respectively. The input end of the ninth switch K62 is connected to the second test end 32c2 corresponding to the negative electrode of the first battery cell to be tested 21, and the input end of the tenth switch K63 is connected to the second test end corresponding to the negative electrode of the second battery cell to be tested 22.

[0292] The output ends of the second switch K21 and the twenty-fourth switch K22 are both connected to the low-voltage input end of the withstand voltage tester. The input end of the second switch K21 is connected to the output end of the sixteenth switch K82 via a current-limiting resistor. The input end of the sixteenth switch K82 is connected to the output ends of the twelfth switch K72 and the output end of the fourteenth switch K74, respectively. The input end of the twelfth switch K72 is connected to the second test end 31a2 corresponding to the positive electrode of the first battery cell to be tested 21, and the input end of the fourteenth switch K74 is connected to the second test end 31b2 corresponding to the positive electrode of the second battery cell to be tested 22. The input end of the twenty-fourth switch K22 is connected to the output end of the eighteenth switch K84 via a current-limiting resistor. The input end of the eighteenth switch K84 is connected to the first test end 32c1 corresponding to the negative electrode of the first battery cell to be tested 21 and the first test end corresponding to the negative electrode of the second battery cell to be tested 22, respectively.

[0293] The output end of the third switch K31 is connected to the high-voltage input end of the multimeter. The input end of the third switch K31 is connected to the output end of the fifteenth switch K81 through a current-limiting resistor. The input end of the fifteenth switch K81 is connected to the output end of the eleventh switch K71 and the output end of the thirteenth switch K73, respectively. The input end of the eleventh switch K71 is connected to the first test end 31a1 corresponding to the positive electrode of the first battery cell 21 to be tested. The input end of the thirteenth switch K73 is connected to the first test end 31b1 corresponding to the positive electrode of the second battery cell 22 to be tested.

[0294] The output end of the fourth switch K41 is connected to the low-voltage input end of the multimeter, the input end of the fourth switch K41 is connected to the output end of the eighteenth switch K84 through a current-limiting resistor, and the input end of the eighteenth switch K84 is respectively connected to the first test end 32c1 corresponding to the negative electrode of the first battery cell to be tested 21 and the first test end corresponding to the negative electrode of the second battery cell to be tested 22.

[0295] The output end of the fifth switch K51 is connected to the first end of the conduction detection module, the input end of the fifth switch K51 is connected to the output end of the sixteenth switch K82 through a current-limiting resistor, the input end of the sixteenth switch K82 is connected to the output end of the twelfth switch K72 and the output end of the fourteenth switch K74 respectively, the input end of the twelfth switch K72 is connected to the second test end 31a2 corresponding to the positive electrode of the first battery cell 21 to be tested, and the input end of the fourteenth switch K74 is connected to the second test end 31b2 corresponding to the positive electrode of the second battery cell 22 to be tested.

[0296] The output end of the sixth switch K61 is connected to the second end of the conduction detection module, the input end of the sixth switch K61 is connected to the output end of the seventeenth switch K83 through a current-limiting resistor, the input end of the seventeenth switch K83 is connected to the output end of the ninth switch K62 and the output end of the tenth switch K63, respectively, the input end of the ninth switch K62 is connected to the second test end 32c2 corresponding to the negative electrode of the first battery cell 21 to be tested, and the input end of the tenth switch K63 is connected to the second test end corresponding to the negative electrode of the second battery cell 22 to be tested.

[0297] When the withstand voltage tester is working, the first switch K11, the fifteenth switch K81, and the eleventh switch K71 are closed, and the first insulation test channel 1111 connects the first test end 31a1 corresponding to the positive pole of the first battery cell 21 to be tested and the high-voltage output end of the withstand voltage tester; the second switch K21, the sixteenth switch K82, and the fourteenth switch K74 are closed, and the second insulation test channel 1112 connects the second test end 31b2 corresponding to the positive pole of the second battery cell 22 to be tested and the low-voltage input end of the withstand voltage tester, thereby performing insulation detection between the positive poles of the first battery cell 21 to be tested and the second battery cell 22 to be tested at the same time through the withstand voltage tester. It is also possible to connect the low-voltage input end of the withstand voltage instrument with the second test end 31a2 corresponding to the positive pole of the first battery cell to be tested 21 by closing the second switch K21, the sixteenth switch K82 and the twelfth switch K72, and connect the high-voltage output end of the withstand voltage instrument with the first test end 32b1 corresponding to the positive pole of the second battery cell to be tested 22 by closing the first switch K11, the fifteenth switch K81 and the thirteenth switch K73, so as to perform insulation detection between the positive poles of the first battery cell to be tested 21 and the second battery cell to be tested 22 through the withstand voltage instrument.

[0298] When voltage and continuity testing is required on the first battery cell 21 to be tested, the third switch K31, the fifteenth switch K81, and the eleventh switch K71 are closed, connecting the high-voltage input terminal of the multimeter to the first test terminal 31a1 corresponding to the positive electrode of the first battery cell 21 to be tested. The fourth switch K41, the eighteenth switch K84, and the fifth switch K42 are closed, connecting the low-voltage input terminal of the multimeter to the first test terminal 32c1 corresponding to the negative electrode of the first battery cell 21 to be tested. The fifth switch K51, the sixteenth switch K82, and the twelfth switch K72 are closed, connecting the first terminal of the continuity testing module to the second test terminal 31a2 corresponding to the positive electrode of the first battery cell 21 to be tested. The eighth switch K61, the seventeenth switch K83, and the ninth switch K62 are closed, connecting the second terminal of the continuity testing module to the second test terminal 32c2 corresponding to the negative electrode of the first battery cell 21 to simultaneously perform voltage and circuit continuity testing on the first battery cell 21 to be tested.

[0299] Through the detection circuit 1 designed as above, the circuit compatibility of different insulation tests between the positive electrodes of the battery cells 2 to be tested can be achieved, and voltage testing and circuit conduction testing can be performed on each battery cell 2 to be tested simultaneously, thereby improving the test efficiency and realizing the automated testing of the battery cells to be tested.

[0300] The present application also provides a detection method, as shown in FIG15 , which includes the following steps:

[0301] Step S10: Acquire a detection signal.

[0302] It should be noted that the detection signal can be generated according to the detection requirements. The detection signal can be a signal for detecting the voltage of the battery cell to be tested, a signal for detecting the circuit conductivity of the battery cell to be tested, a signal for detecting the insulation between the positive electrodes of each battery cell to be tested, etc. For example, if the detection requirement is to detect the voltage of the battery cell to be tested, the detection signal is a signal for detecting the voltage of the battery cell to be tested.

[0303] Step S20: controlling the corresponding detection device to connect to the test terminal corresponding to the battery cell to be tested according to the detection signal.

[0304] It can be understood that when the controller receives the detection signal, it can analyze the detection signal to determine the specific detection item. For example, if the detection signal is to detect the insulation between the positive poles of the battery cells to be tested, the specific detection item is determined to be the test end corresponding to the positive poles of at least two battery cells to be tested. If the detection equipment is an insulation detection equipment, the insulation detection equipment is controlled to be connected to the test end corresponding to the positive pole of the battery cell to be tested according to the detection signal.

[0305] If the detection signal is a voltage detection signal, the voltage detection device is controlled to connect to the test terminal corresponding to the positive electrode and the test terminal corresponding to the negative electrode of the battery cell to be tested according to the voltage detection signal.

[0306] Step S30: testing the battery cell to be tested according to the detection signal to obtain a detection result.

[0307] As an example, after the detection items are determined, the corresponding test channels are connected, and corresponding detection can be performed on the battery cells to be tested according to the corresponding detection signals to obtain detection results, thereby realizing automated detection of the battery cells to be tested.

[0308] In the technical solution of the embodiment of the present application, by obtaining a detection signal, the corresponding detection device is controlled to be connected to the test end corresponding to the battery cell to be tested according to the corresponding detection signal, so that the corresponding detection device can be connected to the test end corresponding to the battery cell to be tested, and the battery cell to be tested can be tested to obtain the detection result. The corresponding detection device can be automatically switched according to the detection signal to detect the battery cell to be tested, thereby realizing automated testing of the battery cell to be tested.

[0309] In some embodiments, different detection signals correspond to different test channels, and different switch arrays are set on the test channels. Therefore, the test end that needs to be connected to the battery cell to be tested and the detection equipment that needs to be connected can be determined through the specific detection signal, so that the battery cell to be tested can be quickly detected.

[0310] Step S20 of “controlling the corresponding detection device to connect to the test terminal corresponding to the battery cell to be tested according to the detection signal” includes:

[0311] Step S201: determining the connection relationship between the test terminal corresponding to the battery cell to be tested and the detection device according to the detection signal.

[0312] It should be noted that the connection between the test terminal of the battery cell under test and the testing equipment varies depending on the test item. Therefore, the connection relationship between the battery cell under test and the corresponding testing equipment can be determined based on the test signal. For example, if the test signal is an insulation test signal, the test terminal corresponding to the battery cell under test can be determined to be the test terminal corresponding to the positive electrode, and the testing equipment can be determined to be an insulation test equipment, thereby determining the connection relationship between the test terminal corresponding to the positive electrode and the insulation test equipment.

[0313] Step S202: determining a target switch array and a closing timing of the target switch array according to the connection relationship.

[0314] In a specific implementation, after obtaining the connection relationship between the test end corresponding to the battery cell to be tested and the detection equipment, the specific test channel can be determined according to the connection relationship, thereby determining the switch array on the test channel, that is, the target switch array, and determining the closing timing of the target switch array.

[0315] The closing timing of the target switch array is the closing state of the switch array corresponding to the specific detection item.

[0316] Step S203: controlling the target switch array to close by the closing timing of the target switch array, so that the corresponding detection device is connected to the test terminal corresponding to the battery cell to be tested.

[0317] It is understandable that, after the closing timing of the target switch array is determined, the target switch array can be controlled to close, so that the corresponding detection device is connected to the test terminal corresponding to the battery cell to be tested.

[0318] In the technical solution of the embodiment of the present application, the test end to which the battery cell to be tested needs to be connected and the detection equipment to be connected can be determined according to the specific detection signal, thereby determining their connection relationship, and determining the corresponding switch array and the closing timing of the switch array according to the connection relationship. The target switch array is controlled to be closed through the closing timing of the switch array, thereby quickly controlling the corresponding detection equipment to be connected to the test end corresponding to the battery cell to be tested, thereby further improving the detection efficiency.

[0319] In some embodiments, the detection signal includes: an insulation detection signal;

[0320] Step S20 of “controlling the corresponding detection device to connect to the test terminal corresponding to the battery cell to be tested according to the detection signal” includes:

[0321] Step S201 ′: controlling the insulation detection device to connect to the test terminal corresponding to the single positive electrode of each battery to be tested according to the insulation detection signal.

[0322] It should be noted that when performing insulation testing on the battery cells to be tested, the insulation testing equipment in the testing equipment can be controlled according to the insulation detection signal to connect to the test end corresponding to the positive electrode of each battery cell to be tested, so that the insulation between the positive electrodes of the battery cells to be tested can be tested.

[0323] In the technical solution of the embodiment of the present application, the detection signal includes an insulation detection signal. When the detection signal obtained is an insulation detection signal, it can be determined that the detection device is an insulation detection device, and the insulation detection device is controlled to be connected to the test end corresponding to the positive pole of each battery cell to be tested, and the insulation detection device is quickly connected to the test end corresponding to the positive pole of the battery cell to be tested according to the insulation detection signal.

[0324] In some embodiments, step S30 of “testing the battery cell to be tested according to the detection signal to obtain a detection result” includes:

[0325] Step S301: performing insulation testing on the test end corresponding to the positive electrode of each battery cell to be tested according to the insulation testing signal to obtain an insulation testing result.

[0326] It can be understood that when insulation testing is required for the battery cells to be tested, the insulation testing equipment is connected to the test end corresponding to the positive pole of each battery cell to be tested, and the insulation testing equipment is controlled according to the insulation detection signal to perform insulation testing on the test end corresponding to the positive pole of each battery cell to be tested, thereby obtaining the insulation test results of the battery cells to be tested.

[0327] The insulation test result may include that the positive electrodes of the battery cells to be tested are insulated from each other, or may include that the positive electrodes of the battery cells to be tested are not insulated from each other.

[0328] In the technical solution of the embodiment of the present application, insulation detection can be performed on the test end corresponding to the positive electrode of each battery cell to be tested according to the insulation detection signal, thereby realizing automatic insulation detection between the positive electrodes of each battery cell to be tested.

[0329] In some embodiments, the detection signal includes: a voltage detection signal and a conduction detection signal;

[0330] Step S20 of “controlling the corresponding detection device to connect to the test terminal corresponding to the battery cell to be tested according to the detection signal” includes:

[0331] Step S201": controlling the voltage detection device to connect to the first test terminal corresponding to the positive electrode of the battery cell to be tested and the first test terminal corresponding to the negative electrode of the battery cell to be tested according to the voltage detection signal and the conduction detection signal, and controlling the conduction detection device to connect to the second test terminal corresponding to the positive electrode of the battery cell to be tested and the second test terminal corresponding to the negative electrode of the battery cell to be tested according to the conduction detection signal.

[0332] It should be noted that since the voltage detection and conduction detection of the battery cell to be tested are carried out simultaneously, the voltage detection device in the detection device can be controlled to be connected to the first test terminal corresponding to the positive pole of the battery cell to be tested and the first test terminal corresponding to the negative pole according to the voltage detection signal and the conduction detection signal, and the second test terminal corresponding to the positive pole of the battery cell to be tested and the second test terminal corresponding to the negative pole can be controlled to be connected according to the conduction detection signal, so that the voltage detection device and the conduction detection device can be used simultaneously to perform voltage and conduction detection on the battery cell to be tested.

[0333] In the technical solution of the embodiment of the present application, the detection signal includes a voltage detection signal and a conduction detection signal. When the detection signal obtained is a voltage detection signal and a conduction detection signal, it can be determined that the detection device is a voltage detection device and a conduction detection device, so as to control the voltage detection device and the conduction detection device to be connected to the positive and negative poles corresponding to the battery cell to be tested respectively, and quickly connect the voltage detection device to the test end corresponding to the positive and negative poles of the battery cell to be tested and the conduction detection device to the test end corresponding to another group of positive and negative poles of the battery cell to be tested according to the voltage detection signal and the conduction detection signal.

[0334] In some embodiments, step S30 of “testing the battery cell to be tested according to the detection signal to obtain a detection result” includes:

[0335] Step S301 ′: performing voltage detection and conduction detection on the battery cell to be tested according to the voltage detection signal and the conduction detection signal to obtain voltage and conduction detection results.

[0336] It should be noted that when voltage detection and conduction detection are required for the battery cell to be tested, the voltage detection device is connected to the first test terminal corresponding to the positive electrode and the first test terminal corresponding to the negative electrode of the battery cell to be tested, and the voltage detection device is controlled according to the voltage detection signal to perform voltage detection on the first test terminal corresponding to the positive and negative electrodes of the battery cell to be tested, thereby obtaining the voltage detection result of the battery cell to be tested. The conduction detection device is connected to the second test terminal corresponding to the positive electrode and the second test terminal corresponding to the negative electrode of the battery cell to be tested, and the conduction detection device is controlled according to the conduction detection signal to perform conduction detection on the second test terminal corresponding to the positive and negative electrodes of the battery cell to be tested, thereby obtaining the conduction detection result of the battery cell to be tested.

[0337] The voltage detection result may include whether the voltage of the battery cell to be tested is normal or abnormal, and the conduction detection result may include whether the circuit of the battery cell to be tested is conductive or disconnected.

[0338] In the technical solution of the embodiment of the present application, voltage detection and conduction detection can be performed synchronously on the test ends corresponding to different positive and negative poles of each battery cell to be tested according to the voltage detection signal and the conduction detection signal, thereby realizing synchronization of voltage and conduction testing of the battery cell to be tested and shortening the test time.

[0339] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A detection circuit, wherein: The detection circuit includes a plurality of detection devices and a plurality of path switching circuits; The input end of each path switching circuit is respectively connected to a different test circuit, each test circuit is respectively connected to a test end corresponding to a battery cell to be tested, and the output end of each path switching circuit is respectively connected to a plurality of the detection devices; The path switching circuit is used to connect the detection device corresponding to the detection signal and the test end corresponding to the battery cell to be tested according to the detection signal; The detection device is used to obtain the detection result of the battery cell to be tested.

2. The detection circuit according to claim 1, wherein: The detection device includes an insulation detection device and a voltage detection device, the battery cells to be tested are multiple, and the path switching circuit includes: an insulation test channel and a voltage test channel; The input end of the insulation test channel is respectively connected to the test ends corresponding to the positive electrodes of the battery cells to be tested, and the output end of the insulation test channel is connected to the insulation detection device; The input end of the voltage test channel is respectively connected to the test end corresponding to the positive electrode of each battery cell to be tested and the test end corresponding to the negative electrode of each battery cell to be tested, and the output end of the voltage test channel is connected to the voltage detection device; The insulation detection device is used to obtain the insulation detection result of the battery cell to be tested when the insulation test channel is connected; The voltage detection device is used to obtain the voltage detection result of the battery cell to be tested when the voltage test channel is connected.

3. The detection circuit according to claim 2, wherein: The insulation test channel includes a first insulation test channel and a second insulation test channel, and the plurality of battery cells to be tested include: a first battery cell to be tested and a second battery cell to be tested, wherein the first battery cell to be tested and the second battery cell to be tested are independent of each other; The input end of the first insulation test channel is connected to the test end corresponding to the positive electrode of the first battery cell to be tested, and the output end of the first insulation test channel is connected to the insulation detection device; The input end of the second insulation test channel is connected to the test end corresponding to the positive electrode of the second battery cell to be tested, and the output end of the second insulation test channel is connected to the insulation detection device.

4. The detection circuit according to claim 3, wherein: The path switching circuit further includes: a first switch array and a second switch array; The first switch array is arranged on the first insulation test channel, the input end of the first switch array is connected to the test end corresponding to the positive electrode of the first battery cell to be tested, and the output end of the first switch array is connected to the insulation detection device; The second switch array is arranged on the second insulation test channel, the input end of the second switch array is connected to the test end corresponding to the positive electrode of the second battery cell to be tested, and the output end of the second switch array is connected to the insulation detection device; The first switch array and the second switch array are used to close when the first battery cell to be tested and the second battery cell to be tested are subjected to insulation testing, and at the same time connect the test end corresponding to the positive electrode of the first battery cell to be tested with the insulation detection equipment and the test end corresponding to the positive electrode of the second battery cell to be tested with the insulation detection equipment.

5. The detection circuit according to claim 2, wherein: The voltage test channel includes a first voltage test channel and a second voltage test channel; The input end of the first voltage test channel is connected to the first test end corresponding to the positive electrode of each battery cell to be tested, and the output end of the first voltage test channel is connected to the voltage detection device; The input end of the second voltage test channel is connected to the first test end corresponding to the negative electrode of each battery cell to be tested, and the output end of the second voltage test channel is connected to the voltage detection device.

6. The detection circuit according to claim 5, wherein: The path switching circuit further includes: a third switch array and a fourth switch array; The third switch array is arranged on the first voltage test channel, the input end of the third switch array is connected to the first test end corresponding to the positive electrode of the battery cell to be tested, and the output end of the third switch array is connected to the voltage detection device; The fourth switch array is arranged on the second voltage test channel, the input end of the fourth switch array is connected to the first test end corresponding to the negative electrode of the battery cell to be tested, and the output end of the fourth switch array is connected to the voltage detection device; The third switch array and the fourth switch array are used to close when the voltage test is performed on the battery cell to be tested, connecting the first test end corresponding to the positive electrode of the battery cell to be tested with the voltage detection device and the first test end corresponding to the negative electrode of the battery cell to be tested with the voltage detection device.

7. The detection circuit according to claim 2, wherein: The path switching circuit further includes: a multiplexing channel; The input end of the insulation test channel and the input end of the voltage test channel are both connected to the test end corresponding to the positive electrode of the battery cell to be tested through the multiplexing channel at the same time.

8. The detection circuit according to claim 7, wherein: The detection device further includes: a conduction detection device, and the path switching circuit further includes: a conduction test channel; The input end of the conduction test channel is connected to the second test end corresponding to the positive electrode of each battery cell to be tested through the multiplexing channel, the input end of the conduction test channel is also connected to the second test end corresponding to the negative electrode of each battery cell to be tested, and the output end of the conduction test channel is connected to the conduction detection device; The conduction detection device is used to obtain the conduction detection result of the battery cell to be tested when the conduction test channel is connected.

9. The detection circuit according to claim 8, wherein: The conduction test channel includes: a first conduction test channel and a second conduction test channel; The input end of the first conduction test channel is connected to the second test end corresponding to the positive electrode of each battery cell to be tested through the multiplexing channel, and the output end of the first conduction test channel is connected to the conduction detection device; The input end of the second conduction test channel is connected to the second test end corresponding to the negative electrode of each battery cell to be tested, and the output end of the second conduction test channel is connected to the conduction detection device.

10. The detection circuit according to claim 9, wherein: The path switching circuit further includes: a fifth switch array and a sixth switch array; The fifth switch array is arranged on the first conduction test channel, the input end of the fifth switch array is connected to the second test end corresponding to the positive electrode of each battery cell to be tested through the multiplexing channel, and the output end of the fifth switch array is connected to the conduction detection device; The sixth switch array is arranged on the second conduction test channel, the input end of the sixth switch array is connected to the second test end corresponding to the negative electrode of each battery cell to be tested, and the output end of the sixth switch array is connected to the conduction detection device; The fifth switch array and the sixth switch array are used to close when performing a conduction test on the battery cell to be tested, connecting the second test end corresponding to the positive electrode of the battery cell to be tested with the conduction detection device and the second test end corresponding to the negative electrode of the battery cell to be tested with the conduction detection device.

11. The detection circuit according to any one of claims 7 to 10, wherein: The path switching circuit further includes: a seventh switch array; The seventh switch array is arranged on the multiplexing channel, the input end of the seventh switch array is connected to the test end corresponding to the positive electrode of each battery cell to be tested, and the output end of the seventh switch array is respectively connected to the input end of the insulation test channel, the input end of the voltage test channel and the input end of the conduction test channel; The seventh switch array is used to close when the battery cell to be tested is tested, so as to connect the test end corresponding to the positive electrode of the battery cell to be tested with the corresponding test channel.

12. The detection circuit according to any one of claims 1 to 11, wherein: The path switching circuit further comprises: a detection switching channel, wherein the battery cells to be tested comprise a first group of battery cells to be tested and a second group of battery cells to be tested; The input end of the detection switching channel is respectively connected to the test end corresponding to the first group of battery cells to be tested and the test end corresponding to the second group of battery cells to be tested, and the output end of the detection switching channel is connected to the detection device; The detection switching channel is used to connect the test ends corresponding to the first group of battery cells to be tested with the detection device when the first group of battery cells to be tested is tested; The detection switching channel is further used to connect the test ends corresponding to the second group of battery cells to be tested with the detection device when the second group of battery cells to be tested is tested.

13. The detection circuit according to claim 12, wherein: The detection switching channel includes: a first detection switching channel and a second detection switching channel; The input end of the first detection switching channel is connected to the test end corresponding to the first group of battery cells to be tested, and the output end of the first detection switching channel is connected to the detection device; The input end of the second detection switching channel is connected to the test end corresponding to the second group of battery cells to be tested, and the output end of the second detection switching channel is connected to the detection device.

14. The detection circuit according to claim 13, wherein: The path switching circuit further includes: an eighth switch array and a ninth switch array; The eighth switch array is provided on the first detection switching channel, the input end of the eighth switch array is connected to the test end corresponding to the first group of battery cells to be tested, and the output end of the eighth switch array is connected to the detection device; The ninth switch array is provided on the second detection switching channel, the input end of the ninth switch array is connected to the test end corresponding to the second group of battery cells to be tested, and the output end of the ninth switch array is connected to the detection device; The eighth switch array is used to close when testing the first group of battery cells to be tested, so as to connect the test terminals corresponding to the first group of battery cells to be tested with the detection device; The ninth switch array is used to close when testing the second group of battery cells to be tested, so as to connect the test ends corresponding to the second group of battery cells to be tested with the detection device.

15. The detection circuit according to claim 13, wherein: The detection equipment includes: a first group of detection equipment and a second group of detection equipment; The input end of the detection switching channel is respectively connected to the test end corresponding to the first group of battery cells to be tested and the test end corresponding to the second group of battery cells to be tested, and the output end of the detection switching channel is respectively connected to the first group of detection equipment and the second group of detection equipment; The detection switching channel is used to connect the test ends corresponding to the first group of battery cells to be tested and the first group of detection equipment when the first group of battery cells to be tested is being tested; The detection switching channel is further used to connect the test ends corresponding to the second group of battery cells to be tested with the second group of detection equipment when the second group of battery cells to be tested is being tested.

16. The detection circuit according to claim 15, wherein: The detection signal includes: a first detection signal; The detection switching channel is further used to connect the test terminals corresponding to the first group of battery cells to be tested with the first group of detection equipment according to the first detection signal; The first group of detection devices is used to obtain the detection results of the first group of battery cells to be tested when the test ends corresponding to the first group of battery cells to be tested are connected to the first group of detection devices.

17. The detection circuit according to claim 15, wherein: The detection signal also includes: a second detection signal; The detection switching channel is further used to connect the test terminals corresponding to the second group of battery cells to be tested with the second group of detection equipment according to the second detection signal; The second group of detection equipment is used to obtain the detection results of the second group of battery cells to be tested when the test ends corresponding to the second group of battery cells to be tested are connected to the second group of detection equipment.

18. The detection circuit according to any one of claims 1 to 17, wherein: The detection circuit also includes a filter circuit; The first end of the filter circuit is connected to the detection device, and the second end of the filter circuit is connected to the path switching circuit; The filtering circuit is used for filtering when the battery cell to be tested is being tested.

19. The detection circuit according to any one of claims 1 to 18, wherein: The detection circuit also includes: a protection circuit; A first end of the protection circuit is connected to the detection device, and a second end of the protection circuit is connected to the path switching circuit; The protection circuit is used to perform current limiting protection when the battery cell to be tested is being tested.

20. A detection method, wherein: The detection method comprises: Get the detection signal; Control the corresponding detection device to connect to the test end corresponding to the battery cell to be tested according to the detection signal; The battery cell to be tested is tested according to the test signal to obtain a test result.

21. The detection method according to claim 20, wherein: The controlling the corresponding detection device to connect to the test end corresponding to the battery cell to be tested according to the detection signal comprises: Determine the connection relationship between the test terminal corresponding to the battery cell to be tested and the detection device according to the detection signal; Determine the target switch array and the closing timing of the target switch array through the connection relationship; The target switch array is closed by controlling the closing timing of the target switch array, so that the corresponding detection device is connected to the test end corresponding to the battery cell to be tested.

22. The detection method according to claim 20, wherein: The detection signal includes: an insulation detection signal; The controlling the corresponding detection device to connect to the test end corresponding to the battery cell to be tested according to the detection signal comprises: The insulation detection device is controlled to be connected to the test end corresponding to the positive electrode of each battery cell to be tested according to the insulation detection signal.

23. The detection method according to claim 22, wherein: The step of testing the battery cell to be tested according to the detection signal to obtain a detection result includes: According to the insulation detection signal, insulation detection is performed on the test end corresponding to the positive electrode of each battery cell to be tested to obtain an insulation detection result.

24. The detection method according to claim 20, wherein: The detection signal includes: a voltage detection signal and a conduction detection signal; The controlling the corresponding detection device to connect to the test end corresponding to the battery cell to be tested according to the detection signal comprises: According to the voltage detection signal and the conduction detection signal, the voltage detection device is controlled to be connected to the first test end corresponding to the positive electrode of the battery cell to be tested and the first test end corresponding to the negative electrode of the battery cell to be tested, and according to the conduction detection signal, the conduction detection device is controlled to be connected to the second test end corresponding to the positive electrode of the battery cell to be tested and the second test end corresponding to the negative electrode of the battery cell to be tested.

25. The detection method according to claim 24, wherein: The step of testing the battery cell to be tested according to the detection signal to obtain a detection result includes: The voltage detection and conduction detection are performed on the battery cell to be tested according to the voltage detection signal and the conduction detection signal to obtain voltage and conduction detection results.

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