Lithium battery conversion testing device

Abstract

The utility model provides a lithium battery conversion test device, and relates to the technical field of batteries, and the lithium battery conversion test device comprises a test control module, a lithium battery conversion module, a DC power supply, a DC load, and a switching module. Wherein the test control module is in communication connection with the lithium battery conversion module, and a battery interface and a discharge interface of the lithium battery conversion module are connected with a power supply end of the direct-current power supply and a power supply end of the direct-current load through the switching module; the control end of the switching module is connected with the test control module, and the DC power supply DC load is in communication connection with the test control module. Therefore, charging and discharging testing, short-circuit protection testing and the like can be achieved through the switching module, the current of the lithium battery conversion testing device does not need to be debugged, manual intervention is not needed, and testing automation is achieved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a lithium battery conversion test device. Background Art

[0002] In the field of battery technology, functional testing of lithium battery conversion test modules is mostly carried out using manual debugging and manual quality inspection.

[0003] Because lithium-ion battery conversion test modules require charge-discharge testing and short-circuit protection testing, current calibration and debugging are cumbersome and prone to errors due to debugging fatigue, which is time-consuming and labor-intensive. Furthermore, manual debugging and quality inspection of lithium-ion battery conversion test modules, which are characterized by high voltage, can easily create the risk of electric shock. Utility Model Content

[0004] The purpose of this application is to provide a lithium battery conversion test module to realize charge and discharge test and short circuit protection test through switching module, without debugging the current of lithium battery conversion test device and without manual intervention, so as to realize test automation.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a lithium battery conversion test device, comprising: a test control module, a lithium battery conversion module, a DC power supply, a DC load, and a switching module;

[0007] The test control module is communicatively connected to the lithium battery conversion module, and the battery interface and the discharge interface of the lithium battery conversion module are both connected to the power supply end of the DC power supply and the power supply end of the DC load through the switching module;

[0008] The control end of the switching module is connected to the test control module, and the DC power supply and the DC load are also communicatively connected to the test control module.

[0009] Optionally, the switching module includes: a first contactor, a second contactor, a third contactor and a fourth contactor;

[0010] The positive power interface of the DC power supply is connected to the positive battery interface and the positive discharge interface of the lithium battery conversion module through the first normally open contact of the first contactor and the first normally open contact of the second contactor respectively; the negative power interface of the DC power supply is connected to the negative battery interface and the negative discharge interface of the lithium battery conversion module through the second normally open contact of the first contactor and the second normally open contact of the second contactor respectively;

[0011] The positive power interface of the DC load is connected to the positive battery interface and the positive discharge interface of the lithium battery conversion module through the first normally open contact of the third contactor and the first normally open contact of the fourth contactor respectively; the negative power interface of the DC load is connected to the negative battery interface and the negative discharge interface of the lithium battery conversion module through the second normally open contact of the third contactor and the second normally open contact of the fourth contactor respectively;

[0012] The first connection terminals of the coils of the first contactor, the second contactor, the third contactor and the fourth contactor are all grounded, and the second connection terminals of the first contactor, the second contactor, the third contactor and the fourth contactor are the first control terminals of the switching module, and are all connected to multiple digital output points of the test control module.

[0013] Optionally, the switching module also includes: a fifth contactor, the first normally open contact and the second normally open contact of the fifth contactor are respectively connected to the positive battery interface and the negative battery interface of the lithium battery conversion module, the first terminal of the coil of the fifth contactor is grounded, and the second terminal of the coil of the fifth contactor is the second control terminal of the switching module, and is also used to connect the digital output point of the test control module.

[0014] Optionally, the switching module also includes: a sixth contactor, the first normally open contact and the second normally open contact of the sixth contactor are respectively connected to the positive discharge interface and the negative discharge interface of the lithium battery conversion module, the first terminal of the coil of the sixth contactor is grounded, and the second terminal of the coil of the sixth contactor is the third control terminal of the switching module, and is also used to connect the digital output node of the test control module.

[0015] Optionally, the lithium battery conversion test device further includes: a first indication unit, wherein a positive pin and a negative pin of the first indication unit are respectively connected to a positive power interface and a negative power interface of the DC power supply.

[0016] Optionally, the lithium battery conversion test device further includes: a second indicating unit, wherein a positive pin and a negative pin of the second indicating unit are respectively connected to a positive power interface and a negative power interface of the DC load.

[0017] Optionally, the test control module includes: a first control unit, an Ethernet unit, a first communication unit, a second communication unit, a digital output unit and a dry contact unit;

[0018] The first control unit is connected to the Ethernet unit, the first communication unit, the second communication unit, the digital output unit and the dry contact unit;

[0019] The Ethernet communication interface of the Ethernet unit is used to connect to a host computer, and the first communication interface and the second communication interface of the first communication unit are respectively connected to the DC power supply and the DC load;

[0020] The communication interfaces of the second communication unit are respectively connected to the corresponding communication interfaces of the lithium battery conversion module; the digital output point and the digital input point of the dry contact unit are respectively connected to the digital input point and the digital output point of the lithium battery conversion module;

[0021] The digital output point of the digital output unit is connected to the control end of the switching module.

[0022] Optionally, any one of the first communication interface and the second communication interface of the first communication unit is: a serial communication interface or an Ethernet communication interface;

[0023] The controller area network (CAN) interface and the serial communication interface of the second communication unit are connected to the CAN interface and the serial communication interface of the lithium battery conversion module respectively.

[0024] Optionally, the lithium battery conversion module includes: a third communication unit, an external interface unit, a second control unit, a drive unit, and a DC-DC power conversion unit; the third communication unit, the external interface unit, and the drive unit are all connected to the second control unit, and the drive unit is connected to the control end of the DC-DC power conversion unit;

[0025] The communication interface of the third communication unit is communicatively connected to the communication interface of the second communication unit in the test control module, and the digital input point and digital output point of the external interface unit are respectively the digital input point and digital output point of the lithium battery conversion module;

[0026] The first power interface and the second power interface of the DC-DC power conversion unit are respectively the battery interface and the discharge interface of the lithium battery conversion module.

[0027] Optionally, the lithium battery conversion module further includes: an insulation detection unit, the third communication unit is connected to the insulation detection unit, and the insulation detection unit is also connected to the battery interface of the lithium battery conversion module;

[0028] The lithium battery conversion test device further includes: an insulation detection circuit, the insulation detection circuit including: a first switch unit, a second switch unit, a first resistor and a second resistor;

[0029] The positive power interface and the negative power interface of the DC power supply are respectively connected to the normally open contact of the first switch unit and the normally open contact of the second switch unit. The normally open contact of the first switch unit and the normally open contact of the second switch unit are also respectively grounded through the first resistor and the second resistor. The first terminal of the coil of the first switch unit and the first terminal of the coil of the second switch unit are both grounded. The first terminal of the coil of the first switch unit and the second terminal of the coil of the second switch unit are respectively connected to the two digital output points of the test control module.

[0030] The beneficial effects of the lithium battery conversion test device provided by this application are:

[0031] The present application provides a lithium battery conversion test device, which is composed of a test control module, a lithium battery conversion module, a DC power supply, a DC load, and a switching module; wherein the test control module is communicatively connected to the lithium battery conversion module, and the battery interface and discharge interface of the lithium battery conversion module are both connected to the power supply end of the DC power supply and the power supply end of the DC load through the switching module, for realizing charge and discharge function testing and short-circuit protection testing; the control end of the switching module is connected to the test control module, and the DC power supply and DC load are also communicatively connected to the test control module. Therefore, the present application can realize automatic charge and discharge testing and short-circuit protection testing, etc. through the switching module, without the need to debug the current of the lithium battery conversion test device, and without manual intervention, thereby avoiding the risk of electric shock and realizing the automation of the lithium battery conversion test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 1 ;

[0034] Figure 2 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 2 ;

[0035] Figure 3 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 3 ;

[0036] Figure 4A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 4 ;

[0037] Figure 5 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 5 ;

[0038] Figure 6 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 6 ;

[0039] Figure 7 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 7 ;

[0040] Figure 8 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 8 ;

[0041] Figure 9 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 9 ;

[0042] Figure 10 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 10 . DETAILED DESCRIPTION

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0046] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0048] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0049] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0050] To better understand the various solutions provided in the embodiments of the present application, a lithium battery conversion test device provided in the embodiments of the present application is described in detail below in conjunction with the accompanying drawings.

[0051] Figure 1 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 1 .like Figure 1 As shown, the lithium battery conversion test device 100 may include: a test control module 110 , a lithium battery conversion module 120 , a DC power supply 130 , a DC load 140 and a switching module 150 .

[0052] Among them, the test control module 110 is communicatively connected to the lithium battery conversion module 120, and is used to receive test instructions sent by the test control module 110 and transmit data; the battery interface and discharge interface of the lithium battery conversion module 120 are both connected to the power supply end of the DC power supply 130 and the power supply end of the DC load 140 through the switching module 150, and are used to realize the charging and discharging function test and short-circuit protection test of the lithium battery conversion module 120 through the switching module 150; the control end of the switching module 150 is connected to the test control module 110, and is used to control the on and off of the switching module 150; the DC power supply 130 and the DC load 140 are also communicatively connected to the test control module 110, and are used to collect data from the DC power supply 130 and the DC load 140.

[0053] The DC power supply 130 can be selected according to actual conditions. For example, the DC power supply 130 can be selected as a DC voltage-regulated power supply.

[0054] It should be noted that the test control module 110 can also be used to communicate with a host computer, and the host computer can be connected to the Internet to transmit the data uploaded by the test control module 110 to the cloud platform. Furthermore, it should be noted that the test functions of the lithium battery conversion test device may include: discharge test, charge test, short circuit protection test, communication test, dry contact test, automatic test, automatic quality inspection, report viewing, error cause viewing, etc. These functions are not limited here.

[0055] In one possible implementation, after the lithium battery conversion test device completes testing, it can automatically generate an easy-to-read table or report of the test results, analyze and determine the test results. For data with test errors, the causes of the errors can be analyzed and listed based on the corresponding historical test results. These tables or reports can be accessed through the "Report View" and "Error View" functions on the host computer. This is not limited here.

[0056] The present application provides a lithium battery conversion test device, which is composed of a test control module, a lithium battery conversion module, a DC power supply, a DC load and a switching module; wherein the test control module is communicatively connected to the lithium battery conversion module, and the battery interface and discharge interface of the lithium battery conversion module are both connected to the power supply end of the DC power supply and the power supply end of the DC load through the switching module, for realizing charge and discharge function testing and short-circuit protection testing; the control end of the switching module is connected to the test control module, and the DC power supply and DC load are also communicatively connected to the test control module. Thus, the present application can realize the switching of automatic charge and discharge tests through the switching module, and realize short-circuit protection testing, etc. according to the lithium battery conversion module and the switching module, and the test control module can be communicatively connected to the DC power supply and the DC load, for realizing control of the DC power supply and the DC load and data interactive feedback. Thus, the lithium battery conversion test device is fully automated for functional testing, without the need to debug the current of the lithium battery conversion test device, and without manual intervention, thereby avoiding the risk of electric shock, and realizing the automation, safety and reliability of the lithium battery conversion test device.

[0057] The following is an illustrative description of the lithium battery conversion test device provided in the embodiments of the present application with reference to the accompanying drawings. Figure 2 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 2 .like Figure 2 As shown, the switching module 150 may include: a first contactor K1 , a second contactor K2 , a third contactor K3 and a fourth contactor K4 .

[0058] Among them, the positive power interface 2 of the DC power supply 130 is connected to the positive battery interface BAT+ and the positive discharge interface BUS+ of the lithium battery conversion module 120 through the first normally open contact of the first contactor K1 and the first normally open contact of the second contactor K2; the negative power interface 1 of the DC power supply 130 is connected to the negative battery interface BAT- and the negative discharge interface BUS- of the lithium battery conversion module 120 through the second normally open contact of the first contactor K1 and the second normally open contact of the second contactor K2; the positive power interface 2 of the DC load 140 is connected to the positive battery interface BAT+ and the positive discharge interface BUS- of the lithium battery conversion module 120 through the first normally open contact of the third contactor K3 and the first normally open contact of the fourth contactor K4. Discharge interface BUS+; the negative power supply interface 1 of the DC load 140 is connected to the negative battery interface BAT- and the negative discharge interface BUS- of the lithium battery conversion module 120 through the second normally open contact of the third contactor K3 and the second normally open contact of the fourth contactor K4 respectively; the first connection terminals of the coils of the first contactor K1, the second contactor K2, the third contactor K3 and the fourth contactor K4 are all connected to the ground corresponding to the preset power supply, and the second connection terminals of the first contactor K1, the second contactor K2, the third contactor K3 and the fourth contactor K4 are the first control terminals of the switching module, which are all connected to multiple digital output points of the test control module 110, such as D01A, D02A, D03A, and D04A.

[0059] It should be noted that among the multiple digital output points of the test control module 110, the odd-numbered pins are used to connect the various control terminals of the switching module 150, and the even-numbered pins are used to connect the preset power supply. The preset power supply can be selected according to actual conditions. For example, the preset power supply can be selected as 24V.

[0060] In one possible implementation, in the discharge test corresponding to the lithium battery conversion test device, the test control module 110 is used to control the first contactor K1 and the fourth contactor K4 to close, and the second contactor K2 and the third contactor K3 to disconnect; the lithium battery conversion module 120 is used to receive the discharge test instruction of the test control module 110; the DC power supply 130 is used to discharge the DC load 140 through the first contactor K1, the lithium battery conversion module 120 and the fourth contactor K4; the test control module 110 is also used to detect the size of the electrical signal data on the DC power supply 130 and the DC load 140 to ensure the completion of the discharge test. In the charging test corresponding to the lithium battery conversion test device, the test control module 110 is used to control the second contactor K2 and the third contactor K3 to close, and the first contactor K1 and the fourth contactor K4 to disconnect; the lithium battery conversion module 120 is used to receive the charging test instruction from the test control module 110; the DC power supply 130 is used to charge the DC load 140 through the third contactor K3, the lithium battery conversion module 120 and the second contactor K2; the test control module 110 is also used to detect the size of the electrical signal data on the DC power supply 130 and the DC load 140 to ensure the completion of the charging test.

[0061] The lithium battery conversion test device provided in the present application, the switching module can be composed of a first contactor, a second contactor, a third contactor and a fourth contactor; wherein, the positive power interface of the DC power supply is connected to the positive battery interface and the positive discharge interface of the lithium battery conversion module respectively through the first normally open contact of the first contactor and the first normally open contact of the second contactor; the negative power interface of the DC power supply is connected to the negative battery interface and the negative discharge interface of the lithium battery conversion module respectively through the second normally open contact of the first contactor and the second normally open contact of the second contactor; the positive power interface of the DC load is connected to the positive battery interface and the positive discharge interface of the lithium battery conversion module respectively through the first normally open contact of the third contactor and the first normally open contact of the fourth contactor; the negative power interface of the DC load is connected to the negative battery interface and the negative discharge interface of the lithium battery conversion module respectively through the second normally open contact of the third contactor and the second normally open contact of the fourth contactor; the first connection terminals of the coils of the first contactor, the second contactor, the third contactor and the fourth contactor are all grounded, and the second connection terminals of the first contactor, the second contactor, the third contactor and the fourth contactor are the first control terminals of the switching module, and are all connected to multiple digital output points of the test control module. Therefore, the present application can realize automatic discharge test through the first contactor and the fourth contactor; and realize automatic charging test according to the second contactor and the third contactor; and then realize automatic charging and discharging test through the switching module, thereby realizing the automation of the lithium battery conversion test device.

[0062] exist Figure 2 On this basis, the lithium battery conversion test device provided in the embodiment of the present application is described below with reference to the accompanying drawings. Figure 3A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 3 .like Figure 3 As shown, the switching module 150 may further include: a fifth contactor K5.

[0063] Among them, the first normally open contact and the second normally open contact of the fifth contactor K5 are respectively connected to the positive battery interface BUS+ and the negative battery interface BUS- of the lithium battery conversion module 120, the first connection terminal of the coil of the fifth contactor K5 is connected to the ground corresponding to the preset power supply (such as 24V), and the second connection terminal of the coil of the fifth contactor K5 is the second control terminal of the switching module 150, and is also used to connect the digital output point D05A of the test control module 110.

[0064] In one possible implementation, the fifth contactor K5 can be used for a charging short-circuit test, that is, in a discharge test corresponding to the lithium battery conversion test device, the fifth contactor K5 can be closed after the second contactor K2 and the third contactor K3 are closed, so as to short-circuit the positive battery interface BUS+ and the negative battery interface BUS- of the lithium battery conversion module 120, thereby achieving the purpose of the charging short-circuit test.

[0065] The lithium battery conversion test device provided by the present application can also include a switching module composed of a fifth contactor, wherein the first normally open contact and the second normally open contact of the fifth contactor are respectively connected to the positive battery interface and the negative battery interface of the lithium battery conversion module, the first terminal of the coil of the fifth contactor is grounded, and the second terminal of the coil of the fifth contactor is the second control terminal of the switching module, which is also used to connect to the digital output point of the test control module. Therefore, the present application can realize the charging short-circuit test of the lithium battery conversion test device by closing the fifth contactor and the second and third contactors.

[0066] exist Figure 3 On this basis, the lithium battery conversion test device provided in the embodiment of the present application is described below with reference to the accompanying drawings. Figure 4 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 4 .like Figure 4 As shown, the switching module 150 may further include: a sixth contactor K6.

[0067] Among them, the first normally open contact and the second normally open contact of the sixth contactor K6 are respectively connected to the positive discharge interface BUS+ and the negative discharge interface BUS- of the lithium battery conversion module 120, the first connection terminal of the coil of the sixth contactor K6 is connected to the ground corresponding to the preset power supply (such as 24V), and the second connection terminal of the coil of the sixth contactor K6 is the third control terminal of the switching module 150, and is also used to connect the digital output node D06A of the test control module 110.

[0068] In one possible implementation, the sixth contactor K6 can be used for a discharge short-circuit test, that is, in the discharge test corresponding to the lithium battery conversion test device, the sixth contactor K6 can be closed after the first contactor K1 and the fourth contactor K4 are closed, so as to short-circuit the positive discharge interface BUS+ and the negative discharge interface BUS- of the lithium battery conversion module 120, thereby achieving the purpose of the discharge short-circuit test.

[0069] The lithium battery conversion test device provided by the present application can also be composed of a switching module consisting of a sixth contactor, wherein the first normally open contact and the second normally open contact of the sixth contactor are respectively connected to the positive discharge interface and the negative discharge interface of the lithium battery conversion module, the first terminal of the coil of the sixth contactor is grounded, and the second terminal of the coil of the sixth contactor is the third control terminal of the switching module, which is also used to connect the digital output node of the test control module. Thus, the sixth contactor of the present application and the closure of the first contactor and the fourth contactor realize the discharge short-circuit test of the lithium battery conversion test device.

[0070] exist Figure 2 On this basis, the lithium battery conversion test device provided in the embodiment of the present application is described below with reference to the accompanying drawings. Figure 5 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 5 .like Figure 5 As shown, the lithium battery conversion testing device 100 may further include: a first indicating unit 160 .

[0071] The positive pin and negative pin of the first indicator unit 160 are connected to the positive power interface 2 and the negative power interface 1 of the DC power supply 130, respectively, and are used to indicate the operating status of the DC power supply 130. For example, if the first indicator unit 160 is green, it means that the DC power supply 130 is capable of charging and discharging; if the first indicator unit 160 is red, it means that the DC power supply 130 is in a fault state.

[0072] It should be noted that the above embodiments corresponding to the lighting of the first indicator unit 160 and the working state of the DC power supply 130 are merely illustrative and should not be construed as limiting the present application.

[0073] The first indicating unit 160 may be selected according to actual conditions. For example, the first indicating unit 160 may be an indicator light Lamp1.

[0074] The lithium battery conversion test device provided herein may further include a first indicator unit, the positive pin and negative pin of which are connected to the positive power interface and negative power interface of a DC power supply, respectively. Thus, the present application can use the first indicator unit to indicate the operating status of the DC power supply, thereby avoiding the risk of electric shock.

[0075] The following is an illustrative description of the lithium battery conversion test device provided in the embodiments of the present application with reference to the accompanying drawings. Figure 6 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 6 .like Figure 6 As shown, the lithium battery conversion testing device 100 may further include: a second indicating unit 170 .

[0076] The positive pin and negative pin of the second indicator unit 170 are connected to the positive power interface 2 and the negative power interface 1 of the DC load 140, respectively, and are used to indicate the operating status of the DC load 140. For example, if the second indicator unit 170 is green, it means that the DC load 140 is operating normally; if the second indicator unit 170 is red, it means that the DC load 140 is in a fault state.

[0077] It should be noted that the above embodiments corresponding to the lighting of the second indicator unit 170 and the working state of the DC load 140 are merely illustrative and should not be construed as limiting the present application.

[0078] The second indicating unit 170 may be selected according to actual conditions. For example, the second indicating unit 170 may be an indicator light Lamp2.

[0079] The lithium battery conversion test device provided herein may further include a second indicator unit, the positive and negative pins of which are connected to the positive and negative power interfaces of a DC load, respectively. Thus, the second indicator unit can be used to indicate the operating status of the DC load, thereby preventing the risk of electric shock.

[0080] The following is an illustrative description of the lithium battery conversion test device provided in the embodiments of the present application with reference to the accompanying drawings. Figure 7 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 7 .like Figure 7 As shown, the test control module 110 may include: a first control unit 111 , an Ethernet unit 112 , a first communication unit 113 , a second communication unit 114 , a digital output unit 115 and a dry contact unit 116 .

[0081] Among them, the first control unit 111 is communicatively connected to the Ethernet unit 112, the first communication unit 113, the second communication unit 114, the digital output unit 115 and the dry contact unit 116; the Ethernet communication interface of the Ethernet unit 112 is used to connect to the host computer, for receiving automatic testing or automatic quality inspection instructions sent by the host computer; the first communication interface and the second communication interface of the first communication unit 113 are communicatively connected to the DC power supply 130 and the DC load 140 respectively; the communication interfaces of the second communication unit 114 are respectively connected to the corresponding communication interfaces of the lithium battery conversion module 120, for data interaction with the lithium battery conversion module 120; the digital output point DO and the digital input point DI of the dry contact unit 116 are respectively connected to the digital input point DI and the digital output point DO of the lithium battery conversion module 120.

[0082] The odd-numbered pins of the digital output point DO of the digital output unit 115 are connected to the control terminal of the switching module 150 ; the even-numbered pins of the digital output point DO of the digital output unit 115 are used to connect to a preset power supply (eg, 24V).

[0083] The lithium battery conversion test device provided in the present application, the test control module can be composed of a first control unit, an Ethernet unit, a first communication unit, a second communication unit, a digital output unit and a dry contact unit; the first control unit is connected to the Ethernet unit, the first communication unit, the second communication unit, the digital output unit and the dry contact unit; the Ethernet communication interface of the Ethernet unit is used to connect to the host computer, the first communication interface and the second communication interface of the first communication unit are respectively connected to the DC power supply and the DC load; the communication interface of the second communication unit is respectively connected to the corresponding communication interface of the lithium battery conversion module; the digital output point and the digital input point of the dry contact unit are respectively connected to the digital input point and the digital output point of the lithium battery conversion module; the digital output point of the digital output unit is connected to the control end of the switching module. Therefore, the test control module in the present application can control the execution of all functional tests in the lithium battery conversion test device. For example, according to the first control unit, the digital output unit, the first communication unit and the second communication unit, in conjunction with the lithium battery conversion module, the DC power supply, the DC load and the switching module, the charge and discharge test and the short-circuit protection test of the lithium battery conversion test device can be realized; it is also possible to use the first control unit, the second communication unit and the communication interface of the lithium battery conversion module to check whether the second communication unit in the test control module and the communication interface of the lithium battery conversion module can normally send and receive data to each other, and then determine whether the communication interface of the lithium battery conversion module is normal, thereby realizing the communication test of the lithium battery conversion test device; at the same time, according to the digital input point and digital output point of the first control unit, the dry contact unit and the lithium battery conversion module, the digital output point of the dry contact unit and the digital input point of the lithium battery conversion module can be controlled by the first control unit to control the on-off operation of the digital output point of the dry contact unit and the digital input point of the lithium battery conversion module, and determine whether the on-off state of the digital input point of the lithium battery conversion module is normal. Similarly, the on-off operation of the digital input point of the dry contact unit and the digital output point of the lithium battery conversion module can be controlled to determine whether the on-off state of the digital output point of the lithium battery conversion module is normal, thereby realizing the dry contact test.

[0084] Optionally, in a possible embodiment, any one of the first communication interface and the second communication interface of the first communication unit 113 is a serial communication interface or an Ethernet communication interface, that is, the first communication interface and the second communication interface of the first communication unit 113 can both be a serial communication interface or an Ethernet communication interface, or any one of the first communication interface and the second communication interface of the first communication unit 113 can be a serial communication interface or an Ethernet communication interface.

[0085] The serial communication interface can be selected according to actual conditions. For example, the serial communication interface can be selected as an RS485 communication interface or an RS232 communication interface, which is not limited here.

[0086] It should be noted that the first communication interface and the second communication interface of the first communication unit 113 may be the same or different. For example, the first communication interface and the second communication interface may both be RS485 communication interfaces, or the first communication interface may be an RS485 communication interface and the second communication interface may be an RS232 communication interface. This is not limited here.

[0087] Furthermore, to clearly illustrate the connection diagram of the second communication unit 114, Figure 8 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 8 .like Figure 8 As shown, the controller area network (CAN) interface and the serial communication interface (such as RS485 communication interface) of the second communication unit 114 are respectively connected to the CAN interface and the serial communication interface (such as RS485 communication interface) of the lithium battery conversion module 120 .

[0088] In the lithium battery conversion test device provided by this application, either the first communication interface or the second communication interface of the first communication unit is a serial communication interface or an Ethernet communication interface; the controller area network (CAN) interface and the serial communication interface of the second communication unit are connected to the CAN interface and the serial communication interface of the lithium battery conversion module, respectively. Thus, this application can achieve communication connection with a DC power supply and a DC load via the first communication interface and the second communication interface of the first communication unit; and achieve communication connection with the lithium battery conversion module via the controller area network (CAN) interface and the serial communication interface of the second communication unit.

[0089] The following is an illustrative description of the lithium battery conversion test device provided in the embodiments of the present application with reference to the accompanying drawings. Figure 9 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 9 .like Figure 9 As shown, the lithium battery conversion module 120 may include: a third communication unit 121 , an external interface unit 122 , a second control unit 123 , a driving unit 124 and a DC-DC power conversion unit 125 .

[0090] Among them, the third communication unit 121, the external interface unit 122 and the driving unit 124 are all connected to the second control unit 123, and the driving unit 124 is connected to the control end of the DC power conversion unit 125; the communication interface of the third communication unit 121 is connected to the communication interface of the second communication unit 114 in the test control module 110, and the digital input and digital output points of the external interface unit 122 are respectively the digital input points and digital output points of the lithium battery conversion module 120; the first power interface and the second power interface of the DC power conversion unit 125 are respectively the battery interface BAT and the discharge interface BUS of the lithium battery conversion module 120.

[0091] The lithium battery conversion test device provided in the present application comprises a lithium battery conversion module composed of a third communication unit, an external interface unit, a second control unit, a drive unit and a DC power conversion unit; the third communication unit, the external interface unit and the drive unit are all connected to the second control unit, the drive unit is connected to the control end of the DC power conversion unit, and is used to drive the DC power conversion unit to perform power conversion; the communication interface of the third communication unit is connected to the communication interface of the second communication unit in the test control module, and is used to implement communication testing; the digital input and digital output points of the external interface unit are respectively the digital input and digital output points of the lithium battery conversion module, and are used to implement dry contact testing; the first power interface and the second power interface of the DC power conversion unit are respectively the battery interface and the discharge interface of the lithium battery conversion module, and are used for power testing in charge and discharge testing.

[0092] The following is an illustrative description of the lithium battery conversion test device provided in the embodiments of the present application with reference to the accompanying drawings. Figure 10 A schematic diagram of the structure of a lithium battery conversion test device provided in an embodiment of the present application Figure 10 .like Figure 10 As shown, the lithium battery conversion module 120 may further include: an insulation detection unit 126 .

[0093] The third communication unit 121 is connected to the insulation detection unit 126 , and the insulation detection unit 126 is further connected to the battery interface of the lithium battery conversion module 120 , so as to implement insulation testing of the lithium battery conversion test device.

[0094] The lithium battery conversion testing device 100 may further include an insulation detection circuit 180 .

[0095] The insulation detection circuit 180 may include: a first switch unit K7, a second switch unit K8, a first resistor R1 and a second resistor R2.

[0096] The positive power interface 2 and the negative power interface 1 of the DC power supply 130 are connected to the normally open contact of the first switch unit K7 and the normally open contact of the second switch unit K8, respectively. The normally open contact of the first switch unit K7 and the normally open contact of the second switch unit K8 are also connected to the PE ground through the first resistor R1 and the second resistor R2, respectively. The first terminal of the coil of the first switch unit K7 and the first terminal of the coil of the second switch unit K8 are both connected to the ground corresponding to the preset power supply (e.g., 24V). The first terminal of the coil of the first switch unit K7 and the second terminal of the coil of the second switch unit K8 are respectively connected to two digital output points of the test control module 110, such as D07A and D08A.

[0097] The first resistor R1 and the second resistor R2 are used as test resistors for insulation testing.

[0098] It should be noted that since the insulation detection circuit 180 is located on both sides of the positive power interface 2 and the negative power interface 1 of the DC power supply 130, it needs to be closed and connected to the lithium battery conversion module 120 through the first contactor K1 in the switching module 150.

[0099] In one possible implementation, during the insulation detection test corresponding to the lithium battery conversion test device, the insulation detection unit 126 in the lithium battery conversion module 120 is configured to receive an initial electrical signal detected when the positive power interface 2 and the negative power interface 1 of the DC power supply 130 are closed by the first contactor K1 in the switching module 150 when the first switch unit K7 and the second switch unit K8 are disconnected, and upload the initial electrical signal to the first control unit 111 in the test control module 110. The insulation detection unit 126 is then further configured to receive an electrical signal detected when the positive power interface 2 and the negative power interface 1 of the DC power supply 130 are closed by the first contactor K1 in the switching module 150 when the first switch unit K7 and the second switch unit K8 are closed, and transmit the electrical signal to the first control unit 111 in the test control module 110. The first control unit 111 determines the difference between the electrical signal and the initial electrical signal, and sends the determination result to the host computer via the Ethernet unit 112, which then presents the insulation detection result.

[0100] The lithium battery conversion test device provided by the present application, the lithium battery conversion module can also be composed of an insulation detection unit, the communication unit is connected to the insulation detection unit, and the insulation detection unit is also connected to the battery interface of the lithium battery conversion module; the lithium battery conversion test device also includes: an insulation detection circuit, the insulation detection circuit is composed of a first switch unit, a second switch unit, a first resistor and a second resistor; the positive power supply interface and the negative power supply interface of the DC power supply are respectively connected to the normally open contact of the first switch unit and the normally open contact of the second switch unit, the normally open contact of the first switch unit and the normally open contact of the second switch unit are also respectively grounded through the first resistor and the second resistor, the first terminal of the coil of the first switch unit and the first terminal of the coil of the second switch unit are both grounded, and the second terminal of the coil of the first switch unit and the second terminal of the coil of the second switch unit are respectively connected to the two digital output points of the test control module. Therefore, the present application can realize the insulation detection test of the lithium battery conversion test device through the insulation detection circuit and the insulation detection unit.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A lithium battery conversion test device, characterized in that: include: Test control module, lithium battery conversion module, DC power supply, DC load and switching module; The test control module is communicatively connected to the lithium battery conversion module, and the battery interface and the discharge interface of the lithium battery conversion module are both connected to the power supply end of the DC power supply and the power supply end of the DC load through the switching module; The control end of the switching module is connected to the test control module, and the DC power supply and the DC load are also communicatively connected to the test control module.

2. The lithium battery conversion test device according to claim 1, characterized in that: The switching module includes: a first contactor, a second contactor, a third contactor and a fourth contactor; The positive power interface of the DC power supply is connected to the positive battery interface and the positive discharge interface of the lithium battery conversion module through the first normally open contact of the first contactor and the first normally open contact of the second contactor respectively; the negative power interface of the DC power supply is connected to the negative battery interface and the negative discharge interface of the lithium battery conversion module through the second normally open contact of the first contactor and the second normally open contact of the second contactor respectively; The positive power interface of the DC load is connected to the positive battery interface and the positive discharge interface of the lithium battery conversion module through the first normally open contact of the third contactor and the first normally open contact of the fourth contactor respectively; the negative power interface of the DC load is connected to the negative battery interface and the negative discharge interface of the lithium battery conversion module through the second normally open contact of the third contactor and the second normally open contact of the fourth contactor respectively; The first connection terminals of the coils of the first contactor, the second contactor, the third contactor and the fourth contactor are all grounded, and the second connection terminals of the first contactor, the second contactor, the third contactor and the fourth contactor are the first control terminals of the switching module, and are all connected to multiple digital output points of the test control module.

3. The lithium battery conversion test device according to claim 2, characterized in that: The switching module also includes: a fifth contactor, the first normally open contact and the second normally open contact of the fifth contactor are respectively connected to the positive battery interface and the negative battery interface of the lithium battery conversion module, the first terminal of the coil of the fifth contactor is grounded, and the second terminal of the coil of the fifth contactor is the second control terminal of the switching module, and is also used to connect the digital output point of the test control module.

4. The lithium battery conversion test device according to claim 2, characterized in that: The switching module also includes: a sixth contactor, the first normally open contact and the second normally open contact of the sixth contactor are respectively connected to the positive discharge interface and the negative discharge interface of the lithium battery conversion module, the first terminal of the coil of the sixth contactor is grounded, and the second terminal of the coil of the sixth contactor is the third control terminal of the switching module, and is also used to connect the digital output node of the test control module.

5. The lithium battery conversion test device according to claim 1, characterized in that: The lithium battery conversion test device further includes: a first indicating unit, wherein a positive pin and a negative pin of the first indicating unit are respectively connected to a positive power interface and a negative power interface of the DC power supply.

6. The lithium battery conversion test device according to claim 1, characterized in that: The lithium battery conversion test device further includes: a second indicating unit, wherein a positive pin and a negative pin of the second indicating unit are respectively connected to a positive power interface and a negative power interface of the DC load.

7. The lithium battery conversion test device according to claim 1, characterized in that: The test control module includes: a first control unit, an Ethernet unit, a first communication unit, a second communication unit, a digital output unit and a dry contact unit; The first control unit is connected to the Ethernet unit, the first communication unit, the second communication unit, the digital output unit and the dry contact unit; The Ethernet communication interface of the Ethernet unit is used to connect to a host computer, and the first communication interface and the second communication interface of the first communication unit are respectively connected to the DC power supply and the DC load; The communication interfaces of the second communication unit are respectively connected to the corresponding communication interfaces of the lithium battery conversion module; the digital output point and the digital input point of the dry contact unit are respectively connected to the digital input point and the digital output point of the lithium battery conversion module; The digital output point of the digital output unit is connected to the control end of the switching module.

8. The lithium battery conversion test device according to claim 7, characterized in that: Any one of the first communication interface and the second communication interface of the first communication unit is: a serial communication interface or an Ethernet communication interface; The controller area network (CAN) interface and the serial communication interface of the second communication unit are connected to the CAN interface and the serial communication interface of the lithium battery conversion module respectively.

9. The lithium battery conversion test device according to claim 7, characterized in that: The lithium battery conversion module includes: a third communication unit, an external interface unit, a second control unit, a drive unit and a DC-DC power conversion unit; the third communication unit, the external interface unit and the drive unit are all connected to the second control unit, and the drive unit is connected to the control end of the DC-DC power conversion unit; The communication interface of the third communication unit is communicatively connected to the communication interface of the second communication unit in the test control module, and the digital input point and digital output point of the external interface unit are respectively the digital input point and digital output point of the lithium battery conversion module; The first power interface and the second power interface of the DC-DC power conversion unit are respectively the battery interface and the discharge interface of the lithium battery conversion module.

10. The lithium battery conversion test device according to claim 9, characterized in that: The lithium battery conversion module further includes: an insulation detection unit, the third communication unit is connected to the insulation detection unit, and the insulation detection unit is also connected to the battery interface of the lithium battery conversion module; The lithium battery conversion test device further includes: an insulation detection circuit, the insulation detection circuit including: a first switch unit, a second switch unit, a first resistor and a second resistor; The positive power interface and the negative power interface of the DC power supply are respectively connected to the normally open contact of the first switch unit and the normally open contact of the second switch unit. The normally open contact of the first switch unit and the normally open contact of the second switch unit are also respectively grounded through the first resistor and the second resistor. The first terminal of the coil of the first switch unit and the first terminal of the coil of the second switch unit are both grounded. The first terminal of the coil of the first switch unit and the second terminal of the coil of the second switch unit are respectively connected to the two digital output points of the test control module.

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