Auxiliary test device and test system

Abstract

The utility model provides an auxiliary test device and a test system, and relates to the technical field of battery management. The auxiliary testing device comprises a power supply monitoring module, the sampling end of the power supply monitoring module is connected with the power supply end of a battery management unit, and the sampling end of the power supply monitoring module is connected with the power supply end of a signal acquisition unit; the switch module is connected with the battery management unit, the signal acquisition unit and the battery pack, and the switch module is used for respectively controlling the on-off state of the battery management unit and the battery pack and the on-off state of the signal acquisition unit and the battery pack; and the controller is connected with the control end of the switch module and is connected with the signal output end of the power supply monitoring module, and the controller is used for controlling the on-off state of the switch module according to the power supply signal. According to the invention, it is ensured that the battery management device can be cut off from all power supplies during power failure, the battery management device is prevented from being damaged, and the safety of the test process of the battery management device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery management, in particular to an auxiliary testing device and a testing system. BACKGROUND

[0002] With the continuous development and improvement of the energy storage industry, higher requirements are put forward for the battery management (BMS, Battery Management System) device. At the initial design stage of the battery management device, the electromagnetic compatibility (EMC, Electromagnetic Compatibility) test needs to be performed on the battery management device. In order to better verify the battery management device, generally, after the battery management device is powered, the battery management unit (BMU, Battery Array Unit) and the signal acquisition unit (SAU, Signal Acquisition Unit) in the battery management device need to be connected with the battery pack of a plurality of series-connected batteries.

[0003] In the related art, the tester may disconnect the power supply of the battery management device, and forget to disconnect the external connected battery pack, thereby causing the battery management device to be damaged in the rectification experiment, and even causing the tester to be injured. Therefore, the safety of the testing process of the battery management device is low. UTILITY MODEL CONTENT

[0004] The present application aims to solve the technical problem of low safety of the testing process of the battery management device in the prior art or related art.

[0005] To this end, a first aspect of the present application provides an auxiliary testing device.

[0006] A second aspect of the present application provides a testing system.

[0007] Therefore, the first aspect of the present application provides an auxiliary testing device applied to a battery management device, the battery management device comprising a battery management unit and a signal acquisition unit, both of which are connected with a battery pack, the auxiliary testing device comprising: a power supply monitoring module, a sampling end of the power supply monitoring module being connected with a power supply end of the battery management unit and a power supply end of the signal acquisition unit, the battery monitoring module being used for acquiring power supply signals of the battery management unit and the signal acquisition unit; a switch module, connected with the battery management unit, the signal acquisition unit and the battery pack, the switch module being used for controlling on-off states of the battery management unit and the battery pack and on-off states of the signal acquisition unit and the battery pack respectively; and a controller, connected with a control end of the switch module and a signal output end of the power supply monitoring module, the controller being used for controlling on-off states of the switch module according to the power supply signals.

[0008] In the technical solution, the auxiliary testing device is used for disconnecting the auxiliary battery management device from the externally connected battery pack in a power-off state during the process of performing electromagnetic compatibility testing on the battery management device. Specifically, the battery management device comprises a battery management unit and a signal acquisition unit, and the battery pack comprises a plurality of batteries, the battery management unit is used for managing states of the plurality of batteries respectively, and the signal acquisition unit is used for acquiring battery states of the plurality of batteries. When the battery management device is tested, the battery management unit and the signal acquisition unit need to be connected with the externally connected battery pack, and the signal acquisition unit needs to be connected with the batteries in the battery pack in series to form a total voltage, and the total voltage is formed at an interface position of the signal acquisition unit.

[0009] In the technical solution, the auxiliary testing device comprises a power supply monitoring module, the power supply monitoring module is used for monitoring power-on states of the signal acquisition unit and the battery management unit, and transmitting the monitored power-on states to the controller. The switch module is connected with the signal acquisition unit and the battery management unit, and when the controller determines that the battery management unit or the signal acquisition unit is powered off, the connection between the battery management unit and the battery pack is cut off, and the connection between the signal acquisition unit and the battery pack is cut off.

[0010] Specifically, the battery management unit is connected with each battery in the battery pack through a monitoring chip, the switch module can control on-off states between the monitoring chip and each battery, and the connection between the battery management unit and each battery is cut off in the case that the battery management unit is powered off. The signal acquisition unit is connected with the series-connected batteries in the battery pack, and the connection between the signal acquisition unit and the plurality of series-connected batteries is cut off when it is monitored that the signal sampling unit is powered off.

[0011] In this technical solution, the power monitoring module transmits a high-level signal to the controller when it detects that the signal acquisition unit and the battery management unit are powered on, and transmits a low-level signal to the controller when it detects that the signal acquisition unit or the battery management unit is powered off. When the controller receives a high-level signal from the power monitoring module, it keeps the switching module on. When it receives a low-level signal from the power monitoring module, it controls the switching module to switch the connection between the battery management unit and the signal acquisition unit and the battery pack, ensuring that all power to the battery management device is cut off.

[0012] In the technical solution of this application, when performing electromagnetic compatibility testing on the battery management device, an auxiliary testing device is connected to the battery management device. The power monitoring module in the auxiliary testing device monitors whether the battery management unit and signal acquisition unit in the battery management device are powered down. When a power failure is detected, the connection between the battery management device and the battery pack can be disconnected in time through the switch module. This ensures that the battery management device is disconnected from all power sources when power is lost, avoids damage to the battery management device, and improves the safety of the battery management device testing process.

[0013] In some technical solutions, optionally, the battery management unit includes an active management unit and a passive management unit, and the power monitoring module includes: N low-voltage monitoring sub-modules, where N is a positive integer;

[0014] The first monitoring submodule is connected to the first power supply of the active management unit, the second monitoring submodule is connected to the equalization power supply of the active management unit, and the third monitoring submodule is connected to the second power supply of the passive management unit. The first monitoring submodule, the second monitoring submodule, and the third monitoring submodule are all submodules among N low-voltage monitoring submodules.

[0015] In this technical solution, the battery management unit includes an active management unit capable of actively balancing the batteries in the battery pack, and a passive management unit capable of passively balancing the batteries in the battery pack.

[0016] The active management unit balances the charging of the plurality of batteries in the battery pack by means of power transfer when the battery pack is being charged, and therefore the active management unit needs to be connected to not only the first power supply but also the balancing power supply, that is, when monitoring the active management unit, not only the first power supply in the passive management unit needs to be monitored, but also the balancing power supply in the active management unit needs to be monitored. The passive management unit releases the power in the battery with a higher voltage in the battery pack in the form of heat by means of resistance discharge when the battery pack is being charged, thereby creating more charging time for other batteries in the battery pack, and therefore the passive management unit does not need to be connected to the balancing power supply, and when monitoring the passive management unit, only the second power supply in the passive management unit needs to be monitored.

[0017] In the technical solution, the power supply monitoring module includes N low-voltage monitoring sub-modules, a first monitoring sub-module in the N low-voltage monitoring sub-modules is connected to the first power supply in the active management unit, for monitoring whether the first power supply in the active management unit is powered off. A second monitoring sub-module in the N low-voltage monitoring sub-modules is connected to the balancing power supply in the active management unit, for monitoring whether the balancing power supply in the active management unit is powered off. A third monitoring sub-module in the N low-voltage monitoring sub-modules is connected to the second power supply in the passive management unit, for monitoring whether the second power supply in the passive management unit is powered off.

[0018] Specifically, when the power supply monitoring module detects that at least one of the first power supply, the second power supply, and the balancing power supply is powered off, the controller controls the switch module to cut off all connections between the battery management device and the battery pack, further improving the safety of testing the battery management device.

[0019] In the technical solution, since the battery management unit includes the active management unit and the passive management unit, the auxiliary testing device needs to be able to monitor the active management unit and the passive management unit, that is, N low-voltage monitoring sub-modules capable of monitoring the active management unit and the passive management unit are arranged in the auxiliary testing device, and the N low-voltage monitoring sub-modules include a first monitoring sub-module, a second monitoring sub-module, and a third monitoring sub-module respectively used for connecting the first power supply, the second power supply, and the balancing power supply, thereby improving the accuracy of monitoring the battery management unit in the battery management device.

[0020] In some technical solutions, optionally, the monitoring voltage of the N low-voltage monitoring sub-modules includes at least one of the following: 5V, 12V, 24V, 36V, 48V, and 60V; wherein the monitoring voltage of the first monitoring sub-module matches the first power supply, the monitoring voltage of the second monitoring sub-module matches the balancing power supply, and the monitoring voltage of the third monitoring sub-module matches the second power supply.

[0021] In the technical solution, the monitoring voltages of the N low-voltage monitoring sub-modules can be different or the same. By setting a plurality of sub-modules with different monitoring voltages in the N low-voltage monitoring sub-modules, when the battery management unit is connected with the low-voltage monitoring sub-modules, the first monitoring sub-module, the second monitoring sub-module and the third monitoring sub-module can be selected according to actual needs.

[0022] Specifically, the corresponding monitoring voltage is determined according to the power supply voltage value and the equalization voltage value of the active management unit, so as to select the corresponding first monitoring sub-module and the second monitoring sub-module in the N low-voltage monitoring sub-modules. The corresponding monitoring voltage is selected according to the power supply voltage value of the passive management unit, so as to select the corresponding third monitoring sub-module in the N low-voltage monitoring sub-modules. It should be noted that the monitoring voltage cannot exceed the corresponding power supply voltage value and equalization voltage value.

[0023] In the technical solution of the present application, by setting the monitoring voltages of the N low-voltage monitoring sub-modules, and setting the monitoring voltages of multiple gears, the auxiliary testing device can adapt to battery management devices of multiple different specifications.

[0024] In some technical solutions, optionally, the power supply monitoring module comprises: a high-voltage monitoring sub-module connected with the third power supply of the signal acquisition unit.

[0025] In the technical solution, the signal acquisition unit is used to acquire the sampling signals of a plurality of series-connected batteries in the battery pack. The third power supply with high voltage needs to be selected according to the plurality of series-connected batteries. Since the voltage of the third power supply is high, a high-voltage monitoring sub-module is arranged in the power supply monitoring module, and the third power supply of the signal acquisition unit is monitored by the high-voltage monitoring sub-module.

[0026] In the technical solution of the present application, since the battery management unit includes the signal acquisition unit, the auxiliary testing device needs to monitor the third power supply of the signal acquisition unit, and the power supply voltage of the third power supply is high. Therefore, a corresponding high-voltage monitoring sub-module is arranged in the battery monitoring module, and the high-voltage monitoring sub-module is used to monitor whether the signal acquisition unit is powered off, thereby improving the accuracy of monitoring the signal acquisition unit in the battery management device.

[0027] In some technical solutions, optionally, the monitoring voltage of the high-voltage monitoring sub-module comprises at least one of the following: 400V, 500V; wherein the monitoring voltage of the high-voltage monitoring sub-module matches the total voltage of the battery pack connected with the signal acquisition unit.

[0028] In the technical solution, the number of high-voltage monitoring sub-modules can be multiple, and the number of high-voltage monitoring sub-modules is greater than the number of signal acquisition units required to be monitored. The monitoring voltages of the multiple high-voltage monitoring sub-modules can be different or the same. When connecting the signal acquisition unit with the high-voltage monitoring sub-module, the corresponding monitoring voltage can be selected according to the actual demand.

[0029] Specifically, the signal acquisition unit is connected with multiple series-connected batteries in the battery pack, and therefore, the corresponding monitoring voltage is selected according to the total voltage of the batteries connected outside the signal acquisition unit.

[0030] In the technical solution of the present application, the monitoring voltages of the high-voltage monitoring sub-modules are set, and multiple-gear monitoring voltages are set, so that the auxiliary testing device can adapt to battery management devices of multiple different specifications.

[0031] In some technical solutions, the battery pack includes M batteries, and the switch module includes: a first relay connected between the monitoring chip of the battery management unit and the battery. The number of first relays is X, X and M are positive integers, and X is greater than or equal to M.

[0032] In the technical solution, the number of batteries in the battery pack is M, and M is a positive integer, that is, the number of batteries in the battery pack can be multiple. The battery management unit includes a monitoring chip, and the monitoring chip is connected with each battery in the battery pack. When the auxiliary testing device controls the disconnection of the connection between the battery management unit and the battery pack, the connection between the monitoring chip in the battery management unit and each battery needs to be cut off. Therefore, in the switch module, a number of first relays greater than the number of batteries in the battery pack need to be set to ensure that a first relay can be set between each battery and the monitoring chip of the battery management unit.

[0033] It should be noted that the battery management unit includes an active management unit and a passive management unit, and the number of first relays is greater than the sum of the number of active management units and the number of passive management units, so that each active management unit and passive management unit can be cut off by the first relay.

[0034] In the technical solution of the present application, multiple first relays are set in the switch module, and the number of first relays is greater than the number of batteries in the battery pack, so that a first relay can be set between each battery and the monitoring chip in the battery management unit, and the connection between the battery management unit and the battery pack can be cut off when the battery management unit is in a power-off state.

[0035] In some embodiments, the auxiliary testing device further comprises a buffer, an input end of the buffer is connected to the controller, and Y output ends of the buffer are connected to control ends of the Y first relays, Y is a positive integer, and Y is less than or equal to X.

[0036] In this embodiment, the auxiliary testing device further comprises a buffer, which is connected between the controller and the first relays, so that the controller can distribute the control signals to the first relays through the buffer when the control signals are sent.

[0037] Specifically, the buffer comprises Y transmission paths, that is, the buffer comprises one input end and Y output ends, and the Y output ends are connected to Y first relays among the X first relays. When the number of the first relays is greater than the number of the output ends of the buffer, multiple buffers can be arranged.

[0038] In the present application, the buffer is arranged in the auxiliary testing device, and the buffer comprises multiple output ends, different output ends of the buffer are connected to different first relays, that is, the controller can distribute the control signals to different first relays through the buffer, thereby synchronously controlling multiple first relays and improving the synchronization of cutting off the connection between multiple batteries and the battery management unit in the battery pack.

[0039] In some embodiments, the number of the buffers is Z, Z is a positive integer, and X is less than or equal to Z times Y.

[0040] In the present application, multiple buffers are arranged, and each buffer comprises multiple output ends, therefore, the number of the output ends of the multiple buffers needs to be greater than the number of the first relays, so that each first relay can receive the control signals sent by the controller and the consistency of the actions of the multiple first relays is improved.

[0041] In some embodiments, the switch module comprises a second relay and a third relay, the second relay is connected between the positive electrode of the battery pack and the total voltage acquisition end of the signal acquisition unit, and the third relay is connected between the negative electrode of the battery pack and the total voltage acquisition end of the signal acquisition unit.

[0042] In this embodiment, the battery management device further comprises a signal acquisition unit, and the total voltage acquisition end of the signal acquisition unit is connected to the positive electrode and the negative electrode of the battery pack. When the signal acquisition unit is powered off, in order to improve the safety of the battery management device, the connection between the total voltage acquisition end of the signal acquisition unit and the positive electrode and the negative electrode of the battery pack needs to be synchronously disconnected, that is, the second relay is arranged between the total voltage acquisition end and the positive electrode of the battery pack, and the third relay is arranged between the total voltage acquisition end and the negative electrode of the battery pack.

[0043] It should be noted that the control ends of the second relay and the third relay are connected with the controller, and the second relay and the third relay can be synchronously disconnected in response to the control signal sent by the controller, so that the positive electrode and the negative electrode of the battery pack are synchronously disconnected from the total voltage collection end of the signal collection unit.

[0044] In the technical scheme, the second relay and the third relay are arranged in the switch module, the second relay is connected between the positive electrode of the battery pack and the signal collection unit, and the third relay is connected between the negative electrode of the battery pack and the signal collection unit, so that the controller can synchronously cut off the connection between the positive electrode and the negative electrode of the battery pack and the signal collection unit when detecting power failure, and the safety of the battery management device test is further improved.

[0045] In some technical schemes, optionally, the number of the second relays, the number of the third relays, and the number of the total voltage collection ends of the signal collection unit are matched.

[0046] In the technical scheme, the signal collection unit can include a plurality of total voltage collection ends, and each total voltage collection end needs to be provided with a corresponding second relay and a third relay. Therefore, by setting the number of the second relays and the third relays to be the same as the number of the total voltage collection ends, the efficiency and stability of cutting off the connection between the plurality of signal collection units connected with the auxiliary test device and the battery pack can be ensured.

[0047] In some technical schemes, optionally, the auxiliary test device further includes: a first input and output port connected between the control end of the second relay and the controller; and a second input and output port connected between the control end of the third relay and the controller.

[0048] In the technical scheme, the auxiliary test device includes the first input and output port connected between the controller and the control end of the second relay, and the second input and output port connected between the controller and the control end of the third relay, so that the control signal output by the controller can be stably transmitted to the second relay and the third relay through the first input and output port and the second input and output port, thereby controlling the second relay and the third relay.

[0049] According to the second aspect of the present application, a test system is provided, which includes: the auxiliary test device in any of the above technical schemes; and a battery management device connected with the auxiliary test device. Since the auxiliary test device is the auxiliary test device in any of the above technical schemes, it has all the beneficial technical effects of the auxiliary test device in any of the above technical schemes, which will not be repeated here.

[0050] Additional aspects and advantages of the present application will become apparent in the light of the following description and by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0051] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings in which:

[0052] Figure 1 One of structural block diagrams of an auxiliary testing device provided in some embodiments of the present application is shown;

[0053] Figure 2 A structural block diagram of a battery management device provided in some embodiments of the present application is shown;

[0054] Figure 3 Another one of structural block diagrams of an auxiliary testing device provided in some embodiments of the present application is shown;

[0055] Figure 4 A structural block diagram of an active management unit provided in some embodiments of the present application is shown;

[0056] Figure 5 A structural block diagram of a passive management unit provided in some embodiments of the present application is shown;

[0057] Figure 6 A structural block diagram of a signal acquisition unit provided in some embodiments of the present application is shown;

[0058] Figure 7 A structural block diagram of a testing system provided in some embodiments of the present application is shown.

[0059] The reference signs are as follows:

[0060] 100 auxiliary testing device, 110 power supply monitoring module, 111 low voltage monitoring sub-module, 112 first monitoring sub-module, 113 second monitoring sub-module, 114 third monitoring sub-module, 115 high voltage monitoring sub-module, 120 switch module, 121 first relay, 122 second relay, 123 third relay, 130 controller, 140 buffer, 150 first input / output port, 160 second input / output port, 170 fourth power supply, 200 battery management device, 210 battery management unit, 211 active management unit, 212 passive management unit, 213 first power supply, 214 equalization power supply, 215 second power supply, 216 monitoring chip, 220 signal acquisition unit, 221 third power supply, 222 total voltage acquisition end, 300 battery pack, 302 battery, 700 testing system. DETAILED DESCRIPTION

[0061] In order to enable a more clear understanding of the above-mentioned objects, features and advantages of the present application, the present application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the features in the embodiments and the specific embodiments can be combined with each other without conflict.

[0062] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and therefore the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0063] The following description refers to the accompanying drawings and specific embodiments. Figures 1 to 7 An auxiliary testing device and a testing system according to some embodiments of the present application are described.

[0064] According to one embodiment of the present application, Figure 1 One of the structural block diagrams of an auxiliary testing device provided in some embodiments of the present application is shown, Figure 2 The structural block diagram of a battery management device provided in some embodiments of the present application is shown, as Figure 1 and Figure 2 As shown, an auxiliary testing device 100 is proposed, which is applied to a battery management device 200, the battery management device 200 includes a battery management unit 210 and a signal acquisition unit 220, the battery management unit 210 and the signal acquisition unit 220 are both connected with a battery pack 300, the auxiliary testing device 100 includes a power supply monitoring module 110, a switch module 120 and a controller 130.

[0065] The sampling end of the power supply monitoring module 110 is connected with the power supply end of the battery management unit 210, and the sampling end of the power supply monitoring module 110 is connected with the power supply end of the signal acquisition unit 220, the power supply monitoring module 110 is used to collect the power supply signals of the battery management unit 210 and the signal acquisition unit 220; the switch module 120 is connected with the battery management unit 210, the signal acquisition unit 220 and the battery pack 300, the switch module 120 is used to control the on-off state of the battery management unit 210 and the battery pack 300, and the on-off state of the signal acquisition unit 220 and the battery pack 300; the controller 130 is connected with the control end of the switch module and the signal output end of the power supply monitoring module 110, the controller 130 is used to control the on-off state of the switch module 120 according to the power supply signals.

[0066] In this embodiment, the auxiliary testing device 100 is used in the process of electromagnetic compatibility test of the battery management device 200, and the auxiliary battery management device 200 is disconnected from the externally connected battery pack 300 in the power-off state. Specifically, the battery management device 200 includes a battery management unit 210 and a signal acquisition unit 220, and the battery pack 300 includes a plurality of batteries 302. The battery management unit 210 is used to manage the states of the plurality of batteries 302 respectively, and the signal acquisition unit 220 is used to acquire the battery state of the plurality of batteries 302. When the battery management device 200 is tested, the battery management unit 210 and the signal acquisition unit 220 need to be connected to the externally connected battery pack 300, and the signal acquisition unit 220 needs to be connected to the battery 302 in the battery pack 300 to form a total voltage, and the total voltage is formed at the interface position of the signal acquisition unit 220.

[0067] Exemplarily, the controller 130 can be a micro controller unit (MCU).

[0068] Exemplarily, the battery 302 in the battery pack 300 can be a small capacity lithium battery.

[0069] In this embodiment, the auxiliary testing device 100 includes a power monitoring module 110, which is used to monitor the power-on state of the signal acquisition unit 220 and the battery management unit 210, and transmit the monitored power-on state to the controller 130. The switch module is connected to the signal acquisition unit 220 and the battery management unit 210. When the controller 130 determines that the battery management unit 210 or the signal acquisition unit 220 is powered off, the connection between the battery management unit 210 and the battery pack 300 is cut off, and the connection between the signal acquisition unit 220 and the battery pack 300 is cut off.

[0070] Specifically, the battery management unit 210 is connected to each battery 302 in the battery pack 300 through a monitoring chip 216, and the switch module 120 can control the on-off state between the monitoring chip 216 and each battery 302. In the case that the battery management unit 210 is powered off, the connection between the battery management unit 210 and each battery 302 is cut off. The signal acquisition unit 220 is connected to the series connected batteries 302 in the battery pack 300. When the signal acquisition unit is monitored to be powered off, the connection between the signal acquisition unit 220 and the plurality of series connected batteries 302 is cut off.

[0071] In this embodiment, the power monitoring module 110 transmits a high level signal to the controller 130 when detecting that the signal acquisition unit 220 and the battery management unit 210 are in a power-on state, and transmits a low level signal to the controller 130 when detecting that the signal acquisition unit 220 or the battery management unit 210 is in a power-off state. The controller 130 maintains the on state of the switch module 120 when receiving the high level signal transmitted by the power monitoring module 110, and controls the switch module 120 to switch the connection between the battery management unit 210 and the signal acquisition unit 220 and the battery pack 300 when receiving the low level signal transmitted by the power monitoring module 110, so as to ensure that all power supplies in the battery management device 200 are cut off.

[0072] In the embodiments of the present application, when the electromagnetic compatibility test is performed on the battery management device 200, the auxiliary test device 100 is connected with the battery management device 200, the power monitoring module 110 in the auxiliary test device 100 monitors whether the battery management unit 210 and the signal acquisition unit 220 in the battery management device 200 are powered off, and when detecting that the power is off, the switch module 120 can timely disconnect the connection between the battery management device 200 and the battery pack 300, so as to ensure that the battery management device 200 can be completely cut off from all power supplies when the power is off, avoid damage to the battery management device 200, and improve the safety of the test process of the battery management device 200.

[0073] Figure 3 Fig. 2 shows a structural block diagram of the auxiliary test device provided in some embodiments of the present application, Figure 4 Fig. 3 shows a structural block diagram of the active management unit provided in some embodiments of the present application, Figure 5 Fig. 4 shows a structural block diagram of the passive management unit provided in some embodiments of the present application, as Figures 3 to 5 As shown in Fig. 1, in some embodiments, the battery management unit 210 includes an active management unit 211 and a passive management unit 212, and the power monitoring module 110 includes N low-voltage monitoring sub-modules 111, where N is a positive integer.

[0074] The first monitoring sub-module 112 is connected with the first power supply 213 of the active management unit 211, the second monitoring sub-module 113 is connected with the equalization power supply 214 of the active management unit 211, and the third monitoring sub-module 114 is connected with the second power supply 215 of the passive management unit 212. The first monitoring sub-module 112, the second monitoring sub-module 113 and the third monitoring sub-module 114 are sub-modules in the N low-voltage monitoring sub-modules 111.

[0075] In this embodiment, the battery management unit 210 includes an active management unit 211 capable of actively balancing the batteries 302 in the battery pack 300, and a passive management unit 212 capable of passively balancing the batteries 302 in the battery pack 300.

[0076] In this embodiment, the active management unit 211 balances the batteries 302 in the battery pack 300 by transferring electric quantity when the battery pack 300 is charging, so the active management unit 211 needs to be connected to not only the first power supply 213 but also the balancing power supply 214, that is, when monitoring the active management unit 211, not only the first power supply 213 in the passive management unit 212 needs to be monitored, but also the balancing power supply 214 in the active management unit 211 needs to be monitored. The passive management unit 212 releases the electric quantity in the battery 302 with higher voltage in the battery pack 300 in the form of heat energy by discharging through resistance when the battery pack 300 is charging, thereby creating more charging time for other batteries 302 in the battery pack 300, so the passive management unit 212 does not need to be connected to the balancing power supply 214, and when monitoring the passive management unit 212, only the second power supply 215 in the passive management unit 212 needs to be monitored.

[0077] In this embodiment, the power supply monitoring module 110 includes N low-voltage monitoring sub-modules 111, a first monitoring sub-module 112 in the N low-voltage monitoring sub-modules 111 is connected to the first power supply 213 in the active management unit 211, for monitoring whether the first power supply 213 in the active management unit 211 is powered off. A second monitoring sub-module 113 in the N low-voltage monitoring sub-modules 111 is connected to the balancing power supply 214 in the active management unit 211, for monitoring whether the balancing power supply 214 in the active management unit 211 is powered off. A third monitoring sub-module 114 in the N low-voltage monitoring sub-modules 111 is connected to the second power supply 215 in the passive management unit 212, for monitoring whether the second power supply 215 in the passive management unit 212 is powered off.

[0078] Specifically, when the power supply monitoring module 110 detects that at least one of the first power supply 213, the second power supply 215 and the balancing power supply 214 is powered off, the controller 130 controls the switch module 120 to cut off all connections between the battery management device 200 and the battery pack 300, further improving the safety of testing the battery management device 200.

[0079] Exemplarily, the auxiliary testing device 100 can be connected with multiple battery management devices 200 at the same time, and the active management units 211 and the passive management units 212 of the multiple battery management devices 200 are monitored synchronously, therefore, the N low-voltage monitoring submodules 111 can include multiple first monitoring submodules 112, multiple second monitoring submodules 113 and multiple third monitoring submodules 114, and the number of the first monitoring submodules 112 and the second monitoring submodules 113 is the same as the number of the active management units 211 of the connected battery management devices 200, and the number of the third monitoring submodules 114 is the same as the number of the passive management units 212.

[0080] In the embodiment, since the battery management unit 210 includes the active management unit 211 and the passive management unit 212, the auxiliary testing device 100 needs to be able to monitor the active management unit 211 and the passive management unit 212, that is, N low-voltage monitoring subunits capable of monitoring the active management unit 211 and the passive management unit 212 are arranged in the auxiliary testing device 100, and the N low-voltage monitoring subunits include a first monitoring subunit, a second monitoring subunit and a third monitoring subunit respectively used for connecting the first power supply 213, the second power supply 215 and the balancing power supply 214, thereby improving the accuracy of monitoring the battery management unit 210 in the battery management device 200.

[0081] In some embodiments, optionally, the monitoring voltage of the N low-voltage monitoring submodules 111 includes at least one of 5V, 12V, 24V, 36V, 48V and 60V; wherein the monitoring voltage of the first monitoring submodule 112 matches the first power supply 213, the monitoring voltage of the second monitoring submodule 113 matches the balancing power supply, and the monitoring voltage of the third monitoring submodule 114 matches the second power supply 215.

[0082] In this embodiment, the monitoring voltages of the N low-voltage monitoring submodules 111 can be different or the same, by arranging multiple submodules with different monitoring voltages in the N low-voltage monitoring submodules 111, when the battery management unit 210 is connected with the low-voltage monitoring submodule 111, the corresponding first monitoring submodule 112, the second monitoring submodule 113 and the third monitoring submodule 114 can be selected according to the actual needs.

[0083] Specifically, the corresponding monitoring voltage is determined according to the supply voltage value and the balancing voltage value of the active management unit 211, so as to select the corresponding first monitoring submodule 112 and the second monitoring submodule 113 in the N low-voltage monitoring submodules 111. The corresponding monitoring voltage is selected according to the supply voltage value of the passive management unit 212, so as to select the corresponding third monitoring submodule 114 in the N low-voltage monitoring submodules 111. It should be noted that the monitoring voltage cannot exceed the corresponding supply voltage value and the balancing voltage value.

[0084] Exemplarily, the first monitoring submodule 112, the second monitoring submodule 113 and the third monitoring submodule 114 can all select the low-voltage monitoring submodule 111 with a monitoring voltage of 5V.

[0085] Exemplarily, the first monitoring submodule 112 and the third monitoring submodule 114 select the low-voltage monitoring submodule 111 with a monitoring voltage of 12V, and the second monitoring submodule 113 can select the low-voltage monitoring submodule 111 with a monitoring voltage of 5V.

[0086] In the embodiment of the application, by setting the monitoring voltage of the N low-voltage monitoring submodules 111, and setting the monitoring voltage of multiple gears, the auxiliary test device 100 can adapt to multiple different specifications of the battery management device 200.

[0087] Figure 6 The structure block diagram of the signal acquisition unit provided in some embodiments of the application is shown as follows: Figure 3 and Figure 6 As shown in FIGS. 1, 2 and 3, in some embodiments, the power monitoring module 110 can optionally include a high-voltage monitoring submodule 115 connected with the third power supply 221 of the signal acquisition unit 220.

[0088] In this embodiment, the signal acquisition unit 220 is used to acquire the sampling signals of the multiple series-connected batteries 302 in the battery pack 300, and the third power supply 221 with high voltage needs to be selected according to the multiple series-connected batteries 302. Since the voltage of the third power supply 221 is high, the high-voltage monitoring submodule 115 is arranged in the power monitoring module 110, and the third power supply 221 of the signal acquisition unit 220 is monitored through the high-voltage monitoring submodule 115.

[0089] In the embodiment of the present application, since the battery management unit 210 includes the signal acquisition unit 220, the auxiliary testing device 100 needs to monitor the third power supply 221 of the signal acquisition unit 220, and the power supply voltage of the third power supply 221 is relatively high. Therefore, the corresponding high-voltage monitoring submodule 115 is arranged in the power supply monitoring module 110, and the high-voltage monitoring submodule 115 is used to monitor whether the signal acquisition unit 220 is powered off, thereby improving the accuracy of monitoring the signal acquisition unit 220 in the battery management device 200.

[0090] In some embodiments, optionally, the monitoring voltage of the high-voltage monitoring submodule 115 includes at least one of 400V and 500V; wherein the monitoring voltage of the high-voltage monitoring submodule 115 matches the total voltage of the battery pack 300 connected to the signal acquisition unit 220.

[0091] In this embodiment, the number of high-voltage monitoring submodules 115 can be multiple, and the number of high-voltage monitoring submodules 115 is greater than the number of signal acquisition units 220 to be monitored. The monitoring voltages of the multiple high-voltage monitoring submodules 115 can be different or the same. When the signal acquisition unit 220 is connected to the high-voltage monitoring submodule 115, the corresponding monitoring voltage can be selected according to actual needs.

[0092] Specifically, the signal acquisition unit 220 is connected to multiple batteries 302 connected in series in the battery pack 300. Therefore, the corresponding monitoring voltage is selected according to the total voltage of the batteries 302 connected in series outside the signal acquisition unit 220.

[0093] In the embodiment of the present application, by setting the monitoring voltage of the high-voltage monitoring submodule 115 and setting multiple gears of the monitoring voltage, the auxiliary testing device 100 can adapt to multiple battery management devices 200 of different specifications.

[0094] As shown in FIG. 1, Figure 3 In some embodiments, optionally, the battery pack 300 includes M batteries 302, and the switch module 120 includes a first relay 121 connected between the monitoring chip 216 of the battery management unit 210 and the battery 302. The number of first relays 121 is X, X and M are positive integers, and X≥M.

[0095] In this embodiment, the number of the batteries 302 in the battery pack 300 is M, and M is a positive integer, that is, the number of the batteries 302 in the battery pack 300 can be multiple. The battery management unit 210 includes a monitoring chip 216, and the monitoring chip 216 is connected with each battery 302 in the battery pack 300. When the auxiliary testing device 100 controls the connection between the battery management unit 210 and the battery pack 300 to be disconnected, the connection between the monitoring chip 216 in the battery management unit 210 and each battery 302 needs to be cut off, and therefore, the number of the first relays 121 in the switch module 120 needs to be greater than the number of the batteries 302 in the battery pack 300, so as to ensure that each battery 302 and the monitoring chip 216 of the battery management unit 210 can be connected with a first relay 121.

[0096] For example, the number of the batteries 302 in the battery pack 300 is 13, and the number of the first relays 121 is 20, so that each battery 302 and the monitoring chip 216 of the battery management unit 210 are connected with a first relay 121.

[0097] It should be noted that the battery management unit 210 includes an active management unit 211 and a passive management unit 212, and therefore, the number of the first relays 121 is greater than the sum of the number of the active management units 211 and the number of the passive management units 212, so as to ensure that each active management unit 211 and each passive management unit 212 can be cut off by the first relays 121.

[0098] In the embodiment, by arranging multiple first relays 121 in the switch module 120, and the number of the first relays 121 is greater than the number of the batteries 302 in the battery pack 300, each battery 302 and the monitoring chip 216 in the battery management unit 210 can be connected with a first relay 121, so as to ensure that when the battery management unit 210 is in a power-off state, all the connections between the battery management unit 210 and the battery pack 300 can be cut off.

[0099] In some embodiments, optionally, the auxiliary testing device 100 further includes a buffer 140, an input end of the buffer 140 is connected with the controller 130, and Y output ends of the buffer 140 are connected with control ends of Y first relays 121, Y is a positive integer, and Y≤X.

[0100] In this embodiment, the auxiliary testing device 100 further includes the buffer 140, which is connected between the controller 130 and the first relays 121, so that when the controller 130 issues a control signal, the controller 130 can distribute the control signal to the first relays 121 through the buffer 140.

[0101] Specifically, the buffer 140 includes Y transmission paths, that is, the buffer 140 includes one input end and Y output ends, and the Y output ends are connected with Y first relays 121 in the X first relays 121 respectively. If the number of the first relays 121 is more than the number of the output ends of the buffer 140, a plurality of buffers 140 can be arranged.

[0102] For example, if the number of the first relays 121 is 13 and the number of the output ends of the buffer 140 is 8, two buffers 140 are needed to be arranged, wherein the 8 output ends of one buffer 140 are connected with 8 first relays 121, and the 5 output ends of the other buffer 140 are connected with the other 5 first relays 121.

[0103] In the embodiment of the application, by arranging the buffer 140 in the auxiliary testing device 100, and the buffer 140 includes a plurality of output ends, different output ends of the buffer 140 are connected with different first relays 121, that is, the buffer 140 can distribute the control signal output by the controller 130 to different first relays 121, thereby synchronously controlling a plurality of first relays 121, and the synchronization of cutting off the connection between the plurality of batteries 302 and the battery management unit 210 in the battery pack 300 is improved.

[0104] In some embodiments, optionally, the number of the buffer 140 is Z, Z is a positive integer, and X≤Z×Y.

[0105] In the embodiment of the application, by arranging a plurality of buffers 140, and each buffer 140 includes a plurality of output ends, therefore, it is needed to ensure that the number of the output ends of the plurality of buffers 140 is more than the number of the first relays 121, thereby ensuring that each first relay 121 can receive the control signal sent by the controller 130, and the consistency of the action of the plurality of first relays 121 is improved.

[0106] In some embodiments, optionally, the switch module 120 includes a second relay 122 and a third relay 123. The second relay 122 is connected between the positive electrode of the battery pack 300 and the total voltage acquisition end 222 of the signal acquisition unit; the third relay 123 is connected between the negative electrode of the battery pack 300 and the total voltage acquisition end 222 of the signal acquisition unit.

[0107] In this embodiment, the battery management device 200 is also provided with a signal acquisition unit, and the total voltage acquisition end 222 of the signal acquisition unit is connected to the positive and negative poles of the battery pack 300. When the signal acquisition unit is powered off, in order to improve the safety of the battery management device 200, the connection between the total voltage acquisition end 222 of the signal acquisition unit and the positive and negative poles of the battery pack 300 needs to be disconnected synchronously, that is, a second relay 122 is arranged between the total voltage acquisition end 222 and the positive pole of the battery pack 300, and a third relay 123 is arranged between the total voltage acquisition end 222 and the negative pole of the battery pack 300.

[0108] It should be noted that the control end of the second relay 122 and the control end of the third relay 123 are both connected to the controller 130, and the second relay 122 and the third relay 123 can be disconnected synchronously in response to the control signal sent by the controller 130, so that the positive and negative poles of the battery pack 300 are disconnected from the total voltage acquisition end 222 of the signal acquisition unit synchronously.

[0109] In the embodiments of the present application, the second relay 122 and the third relay 123 are arranged in the switch module 120, the second relay 122 is connected between the positive pole of the battery pack 300 and the signal acquisition unit, and the third relay 123 is connected between the negative pole of the battery 302 and the signal acquisition unit. Therefore, the controller 130 can synchronously cut off the connection between the positive and negative poles of the battery pack 300 and the signal acquisition unit 220 when detecting power failure, and the safety of the battery management device 200 test is further improved.

[0110] In some embodiments, optionally, the number of second relays 122, the number of third relays 123, and the number of total voltage acquisition ends 222 of the signal acquisition unit are matched.

[0111] In the embodiments of the present application, the signal acquisition unit can include a plurality of total voltage acquisition ends 222, and each total voltage acquisition end 222 needs to be provided with a corresponding second relay 122 and a third relay 123. Therefore, by setting the number of second relays 122 and the number of third relays 123 to be the same as the number of total voltage acquisition ends 222, the efficiency and stability of cutting off the connection between the plurality of signal acquisition units connected to the auxiliary test device 100 and the battery pack 300 can be ensured.

[0112] In some embodiments, optionally, the auxiliary test device 100 further comprises a first input and output port 150 and a second input and output port 160, the first input and output port 150 is connected between the control end of the second relay 122 and the controller 130, and the second input and output port 160 is connected between the control end of the third relay 123 and the controller 130.

[0113] In the embodiment of the present application, the auxiliary testing device 100 comprises a first input / output port 150 connected between the controller 130 and the control end of the second relay 122, and a second input / output port 160 connected between the controller 130 and the control end of the third relay 123, so that the control signal output by the controller 130 can be stably transmitted to the second relay 122 and the third relay 123 through the first input / output port 150 and the second input / output port 160, thereby controlling the second relay 122 and the third relay 123.

[0114] Exemplarily, the first input / output port 150 and the second input / output port 160 are selected as I / O (Input / Output) ports.

[0115] In some embodiments, optionally, the auxiliary testing device 100 further comprises a fourth power supply 170 connected with the power monitoring module 110, the switch module 120 and the controller 130, and used for supplying power to the power monitoring module 110, the switch module 120 and the controller 130.

[0116] According to one embodiment of the present application, Figure 7 The structure block diagram of a testing system provided in some embodiments of the present application is shown in FIG. 7. Figure 7 As shown in FIG. 7, a testing system 700 is provided, which comprises the auxiliary testing device 100 in any of the above embodiments and a battery management device 200 connected with the auxiliary testing device 100. Since the auxiliary testing device 100 is the auxiliary testing device 100 in any of the above embodiments, it has all the beneficial technical effects of the auxiliary testing device 100 in any of the above embodiments, which will not be described herein again.

[0117] It should be noted that in the claims, the specification and the drawings of the present application, the term "a plurality of" means two or more, unless otherwise specifically limited, and the terms "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and make the description process more convenient, and therefore these descriptions cannot be understood as limitations on the present application; the terms "connection", "installation", "fixation" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection between objects, or a detachable connection between objects, or an integral connection; it can be a direct connection between objects, or an indirect connection between objects through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances of the above data.

[0118] In the claims, specification, and drawings of this application, terms have their plain, ordinary meaning unless otherwise indicated by the context of their use. The terms "comprises", "comprising", "includes", "including", "has", "having" and the like are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. The term "about" when used before a numerical designation, has its plain ordinary meaning in common use now, i.e. nearly or nearly enough to an exact value.

[0119] The preferred embodiments of this application are described herein with reference to the drawings, in which: The application may, of course, vary in the details of implementation without departing from the spirit of the application which will be defined solely by the claims.

Claims

1. An auxiliary testing device, characterized in that, The application is applied to a battery management device, the battery management device comprises a battery management unit and a signal acquisition unit, the battery management unit and the signal acquisition unit are connected with a battery pack, and the auxiliary testing device comprises: a power supply monitoring module, a sampling end of the power supply monitoring module is connected with a power supply end of the battery management unit, and a sampling end of the power supply monitoring module is connected with a power supply end of the signal acquisition unit, the power supply monitoring module is used for collecting power supply signals of the battery management unit and the signal acquisition unit; a switch module, connected with the battery management unit, the signal acquisition unit and the battery pack, the switch module is used for controlling on-off states of the battery management unit and the battery pack and on-off states of the signal acquisition unit and the battery pack respectively; a controller, connected with a control end of the switch module and a signal output end of the power supply monitoring module, the controller is used for controlling on-off states of the switch module according to the power supply signals.

2. The supplementary testing device of claim 1, wherein, The battery management unit comprises an active management unit and a passive management unit, and the power supply monitoring module comprises N low-voltage monitoring sub-modules, N being a positive integer. The first monitoring sub-module is connected with a first power supply of the active management unit, the second monitoring sub-module is connected with an equalization power supply of the active management unit, and the third monitoring sub-module is connected with a second power supply of the passive management unit, and the first monitoring sub-module, the second monitoring sub-module and the third monitoring sub-module are sub-modules in the N low-voltage monitoring sub-modules.

3. The supplementary testing device of claim 2, wherein, The monitoring voltage of the N low-voltage monitoring sub-modules comprises at least one of 5V, 12V, 24V, 36V, 48V and 60V. The monitoring voltage of the first monitoring sub-module matches the first power supply, the monitoring voltage of the second monitoring sub-module matches the equalization power supply, and the monitoring voltage of the third monitoring sub-module matches the second power supply.

4. The supplemental testing device of claim 1, wherein, The power supply monitoring module comprises: a high-voltage monitoring sub-module, connected with a third power supply of the signal acquisition unit.

5. The supplementary testing device of claim 4, wherein, The monitoring voltage of the high-voltage monitoring sub-module comprises at least one of 400V and 500V. The monitoring voltage of the high-voltage monitoring sub-module matches the total voltage of the battery pack connected with the signal acquisition unit.

6. The supplementary testing device according to any one of claims 1 to 5, characterized in that, The battery pack comprises M batteries, and the switch module comprises: a first relay, connected between a monitoring chip of the battery management unit and the battery, wherein the number of the first relay is X, X and M are positive integers, and X≥M.

7. The supplementary testing device of claim 6, wherein, The auxiliary testing device further comprises: a buffer, an input end of the buffer is connected with the controller, Y output ends of the buffer are connected with control ends of Y first relays, Y is a positive integer, and Y≤X.

8. The supplemental testing device of claim 7, wherein, The number of the buffer is Z, Z is a positive integer, and X≤Z×Y.

9. The supplementary testing device according to any one of claims 1 to 5, characterized in that, The switch module comprises: a second relay, connected between a positive electrode of the battery pack and a total voltage acquisition end of the signal acquisition unit. A third relay connected between a negative pole of the battery pack and a total voltage acquisition end of the signal acquisition unit.

10. The supplementary testing device of claim 9, wherein, The number of the second relays and the number of the third relays match the number of the total voltage acquisition ends of the signal acquisition unit.

11. The supplemental testing device of claim 9, wherein, The auxiliary testing device further comprises: A first input / output port connected between a control end of the second relay and the controller; A second input / output port connected between a control end of the third relay and the controller.

12. A test system, characterized by The testing system comprises: The auxiliary testing device according to any one of claims 1 to 11; A battery management device connected with the auxiliary testing device.

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