Battery charging and discharging test system

Abstract

The embodiment of the utility model discloses a battery charging and discharging test system, which comprises at least one control unit, a plurality of switch elements, a plurality of charging and discharging machines and a battery pack, and is characterized in that the control unit is used for controlling the on-off state of at least one switch element electrically connected with each charging and discharging machine; the state of the charging and discharging motor is a working state or a standby state; the charging and discharging machine in the standby state is controlled to carry out charging and discharging testing on the target battery pack electrically connected with the charging and discharging machine, and the target battery pack is one or more of the multiple battery packs; the charging and discharging machine is used for carrying out charging and discharging tests on the connected single or multiple battery packs under the condition that the charging and discharging machine is in a working state; wherein the configured actual operation power of the battery charging and discharging test system is smaller than the sum of the maximum rated power of each charging and discharging motor.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of batteries, and relate to but are not limited to a battery charging and discharging test system. Background Art

[0002] The battery testing workshop is a special workshop used to test the performance and quality of batteries. In the battery testing workshop, various tests can be carried out, such as battery charge and discharge tests, capacity tests, cycle life tests, safety performance tests, etc., to ensure that the quality and performance of the batteries meet the relevant standards.

[0003] In the related art, when a battery test workshop is used to perform charge and discharge tests on a battery, multiple charge and discharge machines are generally set up in the battery test workshop to perform charge and discharge tests on a battery pack. However, when multiple charge and discharge machines are working, they often work alone and cannot communicate effectively with each other. It is impossible to reasonably schedule the charge and discharge machines, which will cause a waste of resources. Utility Model Content

[0004] In view of this, the battery charge and discharge test system provided in the embodiment of the present application can realize the reasonable scheduling of the charger and discharge machine, avoid waste of resources, and improve test efficiency. The battery charge and discharge test system provided in the embodiment of the present application is implemented as follows:

[0005] The embodiment of the present application provides a battery charge and discharge test system, the system comprising at least one control unit, a plurality of switch elements electrically connected to the control unit, a plurality of chargers and dischargers, and a battery pack electrically connected to one end of each of the chargers and dischargers; the other end of each of the chargers and dischargers is connected to at least one switch element, the busbars of the respective chargers and dischargers are connected in parallel, and each of the chargers and dischargers is electrically connected to each of the battery packs through the busbars, wherein:

[0006] The control unit is used to control the on / off state of at least one switch element electrically connected to each of the chargers and dischargers, so that each of the chargers and dischargers is in a working state or a standby state; and control the chargers and dischargers in the standby state to perform a charge and discharge test on an electrically connected target battery pack, wherein the target battery pack is one or more of the multiple battery packs;

[0007] The charger and discharger is used to perform charge and discharge tests on a connected single or multiple battery packs when in working state;

[0008] The actual operating power configured for the battery charge and discharge test system is less than the sum of the maximum rated powers of the respective chargers and dischargers.

[0009] In some embodiments, the controlling the charging and discharging machine in the standby state to perform a charging and discharging test on the electrically connected target battery pack includes:

[0010] When the charger and discharger connected in series with the battery pack fails, other chargers and dischargers in a standby state are controlled to perform a charge and discharge test on the battery pack connected in series with the failed charger and discharger.

[0011] In some embodiments, the charger and discharger further comprises a plurality of DC / DC modules, each of which is connected in series between a single charger and discharger and a single battery pack;

[0012] The DC / DC module is used to step up or step down the output voltage of the charger and discharger so that the input voltage of the battery pack is adjusted within a preset range.

[0013] In some embodiments, the system further comprises a configuration module;

[0014] The configuration module is used to configure the actual operating power of the battery charge and discharge test system according to the target total power of the multiple chargers and dischargers, wherein the target total power is the sum of the maximum rated powers of the multiple chargers and dischargers when all are in the charging mode, or the target total power is the sum of the maximum rated powers of the multiple chargers and dischargers when all are in the discharging mode.

[0015] In some embodiments, the configuration module is specifically used to configure the actual operating power of the battery charge and discharge test system to be half of the target total power of the multiple chargers and dischargers, or to configure the actual operating power of the battery charge and discharge test system to be three quarters of the target total power of the multiple chargers and dischargers.

[0016] In some embodiments, the control unit is further configured to configure A number of the charging and discharging machines in working state to perform charging test according to actual production needs, and to configure B number of the charging and discharging machines in working state to perform discharging test within the same period of time. The ratio of the number of A to the number of B is such that the actual operating power configured for the battery charging and discharging test system is less than the sum of the maximum rated powers of each of the charging and discharging machines.

[0017] In some embodiments, the control unit is configured to control the number of the charging and discharging machines for the charging test to be less than the number of the charging and discharging machines for the discharging test when the battery charging and discharging test system is in a peak power consumption period according to the power consumption period of the battery charging and discharging test system; and

[0018] When the battery charge and discharge test system is in a low power consumption period, the number of the charge and discharge machines for the charge test is controlled to be greater than the number of the charge and discharge machines for the discharge test.

[0019] In some embodiments, the switching element is a contactor.

[0020] In some embodiments, the control unit configures each of the chargers and dischargers to be controlled via two switching elements, one switching element being used to control the corresponding charger and discharger to operate in a full-power charging mode, and the other switching element being used to control the corresponding charger and discharger to operate in a full-power discharging mode.

[0021] The battery charge and discharge test system provided in the embodiment of the present application includes at least one control unit, a plurality of switch elements electrically connected to the control unit, a plurality of chargers and dischargers, and a battery pack electrically connected to one end of each charger and discharger, the other end of each charger and discharger is connected to at least one switch element, the busbars of each charger and discharger are connected in parallel, and each charger and discharger is electrically connected to each battery pack through the busbar, so that the control unit can control each charger and discharger to be in working state or standby state by controlling the on-off state of the switch element, so as to realize the scheduling of the work of multiple chargers and dischargers in the entire battery charge and discharge test system. In addition, each charger and discharger is also connected in parallel through the busbar, and each charger and discharger is connected to each battery pack through the busbar. In this way, by setting the chargers and dischargers in parallel, and each charger and discharger can control multiple battery packs, each charger and discharger can communicate effectively with other chargers and dischargers while realizing independent work, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solution of the present application.

[0023] Figure 1 A schematic diagram of a battery charge and discharge test system in the related art provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of a battery charge and discharge test system provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of another battery charge and discharge test system provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of another battery charge and discharge test system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0029] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0030] It should be pointed out that the terms "first\second\third" involved in the embodiments of the present application are used to distinguish similar or different objects, and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0031] The battery testing workshop is a special workshop used to test the performance and quality of batteries. In the battery testing workshop, various tests can be carried out, such as battery charge and discharge test, capacity test, cycle life test, safety performance test, etc., to ensure that the quality and performance of the battery meet the relevant standards.

[0032] In addition, the battery testing workshop is usually equipped with various advanced testing equipment and instruments, such as charge and discharge testers, electrochemical workstations, battery safety performance testers, etc., to achieve comprehensive testing and analysis of batteries. Therefore, the battery testing workshop is an indispensable and important link in the battery R&D and production process, which can ensure that the quality and performance of the battery reach the best level.

[0033] like Figure 1 As shown in FIG. 1 , a schematic diagram of the effect of a battery charging and discharging test system in the related art is given. Figure 1 It can be seen that the battery charge and discharge test system includes a plurality of charge and discharge machines, and each charge and discharge machine is connected to a battery pack respectively.

[0034] It can be seen that in the related technology, when the production unit plans a new factory building (battery testing workshop), there is a lack of a mechanism for scheduling the charging and discharging between the various charging and discharging machines in the battery testing workshop, which leads to the power cabinet design and main transformer design of the workshop often far exceeding the actual use requirements, resulting in huge energy waste; in addition, the charging and discharging machines in the related technology are all operated independently, and different charging and discharging machines have no effective communication, which affects production capacity and indirectly leads to energy waste.

[0035] In view of this, an embodiment of the present application provides a battery charge and discharge test system. Figure 2 As shown, the battery charge and discharge test system 200 includes at least one control unit 201 , a plurality of switch elements 202 , a plurality of chargers and dischargers 203 and a plurality of battery packs 204 .

[0036] The switch element 202 may exist independently in the power control device or as part of the starter. It may be used to connect and disconnect the power line passing through the power line or repeatedly establish and interrupt the power circuit. It may be considered as the intersection of the control circuit and the power circuit, because it is controlled by the control circuit and controls the circuit between the power supply and the load.

[0037] In some embodiments, in a high-voltage circuit, the switch element may be a contactor, a plastic case, etc.; in a low-voltage circuit, the switch element may be a relay.

[0038] The charger and discharger 203 is a device widely used in various types of battery formation, plate formation, and rapid pulse formation charging and discharging. It can detect the voltage and temperature of a single cell.

[0039] like Figure 2 As shown, multiple switching elements 202 are electrically connected to at least one control unit 201, one end of each charger and discharger 203 is electrically connected to a battery pack 204, the other end of each charger and discharger 203 is connected to at least one switching element 202, the busbars 205 between each charger and discharger 203 are connected in parallel, and each charger and discharger 203 is electrically connected to each battery pack 204 through the busbar 205.

[0040] In an embodiment of the present application, a control unit 201 is used to control the on / off state of at least one switching element 202 connected to each charger and discharger 203, so that the state of each charger and discharger is a working state or a standby state; and to control the charger and discharger in the standby state to perform a charge and discharge test on the electrically connected target battery group, where the target battery group is one or more of the multiple battery groups.

[0041] In a preferred embodiment, the number of control units 201, switch elements 202, chargers and dischargers 203, and battery packs 204 is the same.

[0042] like Figure 2 As shown, each charger and discharger 203 is connected in parallel through a busbar. In this way, when the control unit 201 controls the on-off state of the switch element 202 connected to each charger and discharger 203, the charger and discharger 203 corresponding to each switch element 202 can be controlled to be in a working state or a standby state, thereby realizing reasonable scheduling of multiple chargers and dischargers 203 and improving the test efficiency of the charger and dischargers.

[0043] Specifically, when the switch element 202 is in the on state, the corresponding connected charger and discharger 203 is controlled to be in the working state; when the switch element 202 is in the off state, the corresponding connected charger and discharger 203 is controlled to be in the standby state. In this way, by adding a control unit and a switch element to the battery charge and discharge test system, the control of the working states of different chargers and dischargers can be realized.

[0044] In addition, since the multiple chargers and dischargers 203 are connected in parallel, when each charger and discharger 203 is working, it will not be interfered by other chargers and dischargers 203, so the test accuracy of the charger and discharger can be improved.

[0045] In the embodiment of the present application, the control unit 201 can also control the charger and discharger in the standby state to perform a charge and discharge test on the electrically connected target battery pack, which is one or more of the multiple battery packs. In this way, when the charger and discharger is in the standby state, it can also accept a work instruction to perform a charge and discharge test on the connected one or more battery packs.

[0046] For example, if Figure 2 As shown, the charger and discharger 4 is in a standby state. After receiving a working instruction and switching to a working state, it can perform a charge and discharge test on the connected battery pack 4; or, it can perform a charge and discharge test on the connected battery pack 5.

[0047] In this way, each charger and discharger 203 can also effectively communicate with other charger and discharger 203, thereby improving the test efficiency of the charger and discharger.

[0048] In the embodiments of the present application, there is no limitation on the installation position of the busbar. For example, in some embodiments, the busbar may be arranged inside each charging and discharging machine.

[0049] The charger and discharger 203 is used to perform charge and discharge tests on a single or multiple connected battery packs 204 when in working state.

[0050] The charger and discharger performs charge and discharge tests on the connected battery pack, that is, performs charge test and discharge test on the connected battery pack.

[0051] When the charger / discharger 203 performs a charging test on the battery pack 204, it can charge the battery pack 204 through the charging function to test the charging parameters such as the charging time and the charging current of the battery pack 204. When the charger / discharger 203 performs a discharge test on the battery pack 204, it can discharge the battery pack 204 through the discharge function to test the discharge parameters such as the discharge time and the discharge current of the battery pack 204. In this way, the obtained charging parameters and discharge parameters can be used to reflect the performance of the battery pack.

[0052] In the embodiment of the present application, the actual operating power configured for the battery charge and discharge test system is less than the sum of the maximum rated powers of the various charge and discharge machines. In this way, when the actual operating power of the battery charge and discharge test system is set, a certain margin is left to avoid over-configuration of power and waste of resources.

[0053] In an embodiment of the present application, the battery charge and discharge test system includes at least one control unit, a plurality of switch elements electrically connected to the control unit, a plurality of chargers and dischargers, and a battery pack electrically connected to one end of each charger and discharger, the other end of each charger and discharger is connected to at least one switch element, the busbars of each charger and discharger are connected in parallel, and each charger and discharger is electrically connected to each battery pack through the busbar, so that the control unit can control each charger and discharger to be in working state or standby state by controlling the switching state of the switch element, so as to realize the scheduling of the work of multiple chargers and dischargers in the entire battery charge and discharge test system. In addition, each charger and discharger is also connected in parallel through the busbar, and each charger and discharger is connected to each battery pack through the busbar. In this way, by setting the chargers and dischargers in parallel, and each charger and discharger can control multiple battery packs, each charger and discharger can communicate effectively with other chargers and dischargers while realizing independent work, thereby improving the test efficiency.

[0054] The present application embodiment further provides a battery charging and discharging test system. Figure 3 As shown, the battery charge and discharge test system 300 includes at least one control unit 301 , a plurality of switch elements 302 , a plurality of chargers and dischargers 303 , a plurality of battery packs 304 and a plurality of DC / DC modules 306 .

[0055] like Figure 3 As shown, multiple switching elements 302 are electrically connected to at least one control unit 301, one end of each charger and discharger 303 is electrically connected to a battery pack 304, the other end of each charger and discharger 303 is connected to at least one switching element 302, the busbars 305 between the chargers and dischargers 303 are connected in parallel, each charger and discharger 303 is electrically connected to each battery pack 304 through the busbar 305, and each DC / DC module 306 is respectively connected to a single charger and discharger 303 and a single battery pack 304.

[0056] In an embodiment of the present application, a control unit 301 is used to control the on / off state of at least one switching element 302 connected to each charger and discharger 303, so that the state of each charger and discharger is a working state or a standby state; and to control the charger and discharger in the standby state to perform a charge and discharge test on an electrically connected target battery group, where the target battery group is one or more of a plurality of battery groups.

[0057] The charger and discharger 303 is used to perform charge and discharge tests on a single or multiple connected battery packs 204 when in working state.

[0058] The control unit 301 is further used to control the charger and discharger 303 in a standby state to perform a charge and discharge test on an electrically connected target battery pack, where the target battery pack is one or more of the multiple battery packs.

[0059] Specifically, the control unit 301 can control other chargers and dischargers 303 in standby mode to perform charge and discharge tests on the battery pack 304 connected in series with the failed charger and discharger when a charger and discharger 303 connected in series with the failed charger and discharger fails.

[0060] It can be understood that in the embodiment of the present application, multiple chargers and dischargers 303 are connected in parallel via the bus 305, and each charger and discharger 303 is also connected to all battery packs 304 via the bus 305, that is, each charger and discharger 303 has the ability to perform charge and discharge tests on all battery packs 304.

[0061] In this way, if a fault occurs in a working charger and discharger 303, the control unit 301 can be used to control the switching state of the switching element 302 connected to the charger and discharger 303 in the standby state, so as to control the charger and discharger 303 in the standby state to change to the working state, thereby using the charger and discharger 303 in the standby state to perform a charge and discharge test on the battery pack 304 connected to the faulty charger and discharger 303.

[0062] For example, if Figure 3 As shown, it is assumed that the charger 1 and the charger 3 are in working state, the charger 1 performs charge and discharge test on the connected battery pack 1, the charger 3 performs charge and discharge test on the connected battery pack 2, and the charger 2 and the charger 4 are in standby state. In this way, in the case of a failure of the charger 1, the switch element 302 connected to the charger 2 or the charger 4 in the standby state can be controlled to control the charger 2 or the charger 4 to switch to the working state, so that the battery pack 1 is charged and discharged by the charger 2 or the charger 4 switched to the working state.

[0063] Among them, the embodiment of the present application does not limit the method of selecting the target charger and discharger from the charger and discharger in the standby state to perform a charge and discharge test on the battery pack connected to the failed charger and discharger. For example, a charger and discharger that is closer to the failed charger and discharger can be selected as the target charger and discharger, or a target charger and discharger that has no tasks in the future time period and can meet the charge and discharge test of the battery pack can be selected based on the assigned tasks of the charger and discharger in the standby state in the future time period and the test time required for the charge and discharge test of the battery pack.

[0064] The DC / DC module 306 is used to step up or step down the output voltage of the charger / discharger 303 so that the input voltage of the battery pack 304 is adjusted within a preset range.

[0065] It is understandable that, since the models of battery packs to be tested may be different, when performing charge and discharge tests on battery packs of different models, the input voltage of the battery pack should also be within its loadable range.

[0066] Based on this, in an embodiment of the present application, by setting a DC / DC module 306 in the charger and discharger 303 and the battery pack 304, the output voltage of the charger and discharger 303 can be boosted or bucked by the DC / DC module 306, so that the input voltage input to the battery pack 304 is adjusted to a preset range, so that the input voltage is within the carrying range of the battery pack 304.

[0067] In the embodiment of the present application, there is no limitation on the value of the preset range, for example, the preset range may be between 50V-500V.

[0068] In the embodiment of the present application, the control unit can control each charger and discharger to be in working state or standby state by controlling the switch state of the switch element, so as to realize the scheduling of the work of multiple chargers and dischargers in the entire battery charge and discharge test system. In addition, each charger and discharger is also connected in parallel through a bus bar, and each charger and discharger is connected to each battery pack through the bus bar. In this way, by setting each charger and discharger in parallel, and each charger and discharger can control multiple battery packs, each charger and discharger can effectively communicate with other chargers and dischargers, thereby improving the test efficiency.

[0069] The present application embodiment further provides a battery charging and discharging test system. Figure 4 As shown, the battery charge and discharge test system 400 includes at least one control unit 401 , multiple switch elements 402 , multiple chargers and dischargers 403 , multiple battery packs 404 , a bus 405 , multiple DC / DC modules 406 and a configuration module 407 .

[0070] like Figure 4As shown, the control unit 401 is respectively connected to each switch element 402 of at least one switch element, each charger and discharger 403 is respectively connected to at least one switch element 402 of the multiple switch elements, the chargers and dischargers 403 are connected in parallel through a bus 405, each charger and discharger 403 is connected to each battery pack 404 through the bus 405, and each DC / DC module 406 is respectively connected to a single charger and discharger 403 and a single battery pack 404.

[0071] In an embodiment of the present application, a control unit 401 is used to control the on / off state of at least one switching element 402 connected to each charger and discharger 403, so that the state of each charger and discharger 403 is a working state or a standby state; and to control the charger and discharger 403 in the standby state to perform a charge and discharge test on an electrically connected target battery group, where the target battery group is one or more of a plurality of battery groups.

[0072] The charger / discharger 403 is used to perform charge / discharge tests on a single or multiple connected battery packs 204 when in working condition.

[0073] The control unit 401 is also used to control other chargers and dischargers 403 in standby state to perform charge and discharge tests on the battery pack 404 connected in series with the failed charger and discharger when a charger and discharger 403 connected in series with the failed charger and discharger fails.

[0074] The DC / DC module 406 is used to step up or step down the output voltage of the charger / discharger 403 so that the input voltage of the battery pack 404 is adjusted within a preset range.

[0075] The configuration module 407 is used to configure the actual operating power of the battery charge and discharge test system 400 according to the target total power of the multiple chargers and dischargers 403, wherein the target total power is the sum of the maximum rated powers of the multiple chargers and dischargers when all are in the charging mode, or the target total power is the sum of the maximum rated powers of the multiple chargers and dischargers when all are in the discharging mode.

[0076] It is understandable that in the related art, when planning a new battery charge and discharge test system (battery test workshop), it is often just to accumulate the peak charge capacity or peak discharge capacity of each charger and discharger in the battery test workshop, and use the accumulated result as the distribution power for the battery charge and discharge test system. However, in actual production, it is generally not the case that the chargers and dischargers are charged at the same time, or the chargers and dischargers are discharged at the same time. Often, some chargers and dischargers are charged and some are discharged. Therefore, it is difficult to fully utilize the distribution power determined by the peak charge capacity or discharge capacity, resulting in the design of the power cabinet and main transformer in the battery charge and discharge test system often far exceeding the actual use requirements, resulting in a waste of resources.

[0077] Based on this, in an embodiment of the present application, when determining the power distribution of the battery charge and discharge test system, it is determined based on the target total power of the multiple chargers and dischargers 403, that is, based on the sum of the maximum rated powers of the multiple chargers and dischargers 403 when all are in the charging mode, or based on the sum of the maximum rated powers of the multiple chargers and dischargers when all are in the discharging mode.

[0078] During specific determination, the configuration module 407 may specifically configure the actual operating power of the battery charge and discharge test system 400 to be half of the target total power of the multiple charge and discharge machines, or configure the distribution power of the battery charge and discharge test system to be three quarters of the target total power of the multiple charge and discharge machines.

[0079] In this way, when the actual operating power of the battery charge and discharge test system 400 is set, a certain margin can be left to avoid the actual operating power being configured too high, which would cause a waste of resources.

[0080] In the embodiment of the present application, the control unit 401 is further configured to configure A number of working chargers and dischargers 403 for charging test according to actual production needs, and to configure B number of working chargers and dischargers 403 for discharging test in the same period of time. The configuration ratio of A and B makes the actual operating power of the battery charge and discharge test system configured to be less than the sum of the maximum rated powers of each charger and discharger 403.

[0081] Here, by controlling the number of charging and discharging machines for charging tests and the number of charging and discharging machines for discharging tests through the control unit 401, it is possible to ensure that the total power demand of the battery charging and discharging test system 400 is lower than the planned demand, that is, to ensure that the total power demand of the battery charging and discharging test system 400 is lower than the actual operating power of the configuration, thereby effectively achieving the purpose of energy conservation and emission reduction.

[0082] For example, in some embodiments, among the multiple chargers and dischargers, 10 chargers and dischargers can be controlled to be in full-power charging mode, and 5 chargers and dischargers can be controlled to be in full-power discharging mode, so that the electric energy obtained by the entire battery charge and discharge test system from the power grid is approximately the electric energy required by the 5 chargers and dischargers in full-power charging mode.

[0083] In some embodiments, the control unit 401 is further configured to control the number of the charging and discharging machines 403 for the charging test to be less than the number of the charging and discharging machines 403 for the discharging test when the battery charging and discharging test system 400 is in a peak power consumption period according to the power consumption period of the battery charging and discharging test system; and

[0084] When the battery charge and discharge test system 400 is in a low power consumption period, the number of the charge and discharge machines 403 performing the charge test is controlled to be greater than the number of the charge and discharge machines 403 performing the discharge test.

[0085] Here, the working mode of the charger and discharger can also be allocated according to the power consumption of the battery charge and discharge test system in different time periods, thereby reducing the overall power consumption of the battery charge and discharge test system to achieve the purpose of energy saving and emission reduction.

[0086] For example, during implementation, the working mode of each charger and discharger can be reasonably controlled according to the power consumption of the battery charge and discharge test system during the day and at night. For example, during the day, while ensuring that the total power does not exceed the configuration capacity of the battery charge and discharge test system, the chargers and dischargers are allocated as much as possible to perform discharge tests on the connected batteries, so that other equipment in the battery charge and discharge test system can consume part of the electrical energy; at night, the chargers and dischargers are allocated as much as possible to perform charge tests on the connected batteries, and the low power consumption at night is reasonably utilized, thus achieving the task of "peak shaving and valley filling" to a certain extent.

[0087] In some embodiments, Figure 4 As shown, each charger and discharger 403 can also be set to be controlled by two switch elements 402, one switch element 402 is used to control the corresponding charger and discharger to work in a full-power charging mode, and the other switch element 402 is used to control the corresponding charger and discharger to work in a full-power discharging mode.

[0088] In this way, the working conditions of the charger and discharger in different working modes, that is, the charging mode or the discharging mode, can be controlled respectively through switching elements of different paths, which can avoid confusion when changing the working conditions of the charger and discharger in different working modes, and further improve the control accuracy of the working of the charger and discharger.

[0089] In the embodiment of the present application, the control unit can control each charger and discharger to be in working state or standby state by controlling the switch state of the switch element, so as to realize the scheduling of the work of multiple chargers and dischargers in the entire battery charge and discharge test system. In addition, each charger and discharger is also connected in parallel through a bus bar, and each charger and discharger is connected to each battery pack through the bus bar. In this way, by setting each charger and discharger in parallel, and each charger and discharger can control multiple battery packs, each charger and discharger can effectively communicate with other chargers and dischargers, thereby improving the test efficiency.

[0090] It should be understood that, although the steps in the above-mentioned flowcharts are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the above-mentioned flowcharts may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these sub-steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0091] It should be understood that "one embodiment" or "an embodiment" or "some embodiments" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in one embodiment" or "in some embodiments" appearing throughout the specification may not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above description of each embodiment tends to emphasize the differences between the various embodiments, and the same or similar aspects can be referenced to each other. For the sake of brevity, this article will not repeat them.

[0092] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist at the same time, and object B exists alone.

[0093] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, article or device including the element.

[0094] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery charge and discharge test system, characterized in that: The system comprises at least one control unit, a plurality of switch elements electrically connected to the control unit, a plurality of chargers and dischargers, and a battery pack electrically connected to one end of each of the chargers and dischargers; the other end of each of the chargers and dischargers is connected to at least one switch element, the busbars of the chargers and dischargers are connected in parallel, and each of the chargers and dischargers is electrically connected to each of the battery packs through the busbars, wherein: The control unit is used to control the on / off state of at least one switch element electrically connected to each of the chargers and dischargers, so that each of the chargers and dischargers is in a working state or a standby state; and control the chargers and dischargers in the standby state to perform a charge and discharge test on an electrically connected target battery pack, wherein the target battery pack is one or more of the multiple battery packs; The charger and discharger is used to perform charge and discharge tests on a connected single or multiple battery packs when in working state; The actual operating power configured for the battery charge and discharge test system is less than the sum of the maximum rated powers of the respective chargers and dischargers.

2. The system according to claim 1, characterized in that The controlling the charging and discharging machine in a standby state to perform a charging and discharging test on an electrically connected target battery pack includes: When the charger and discharger connected in series with the battery pack fails, other chargers and dischargers in a standby state are controlled to perform a charge and discharge test on the battery pack connected in series with the failed charger and discharger.

3. The system according to claim 1, characterized in that The charger and discharger further comprises a plurality of DC / DC modules, each of which is connected in series between a single charger and discharger and a single battery pack; The DC / DC module is used to step up or step down the output voltage of the charger and discharger so that the input voltage of the battery pack is adjusted within a preset range.

4. The system according to claim 1, characterized in that The system also includes a configuration module; The configuration module is used to configure the actual operating power of the battery charge and discharge test system according to the target total power of the multiple chargers and dischargers, wherein the target total power is the sum of the maximum rated powers of the multiple chargers and dischargers when all are in the charging mode, or the target total power is the sum of the maximum rated powers of the multiple chargers and dischargers when all are in the discharging mode.

5. The system according to claim 4, characterized in that The configuration module is specifically used to configure the actual operating power of the battery charge and discharge test system to be half of the target total power of the multiple chargers and dischargers, or to configure the actual operating power of the battery charge and discharge test system to be three quarters of the target total power of the multiple chargers and dischargers.

6. The system according to claim 1, characterized in that The control unit is further configured to configure A number of the chargers and dischargers in working state to perform a charging test according to actual production needs, and to configure B number of the chargers and dischargers in working state to perform a discharging test within the same period of time, wherein the ratio of A to B is such that the actual operating power configured for the battery charge and discharge test system is less than the sum of the maximum rated powers of each of the chargers and dischargers.

7. The system according to claim 1, characterized in that The control unit is configured to control the number of the charging and discharging machines for the charging test to be less than the number of the charging and discharging machines for the discharging test when the battery charging and discharging test system is in a peak power consumption period according to the power consumption period of the battery charging and discharging test system; and When the battery charge and discharge test system is in a low power consumption period, the number of the charge and discharge machines for the charge test is controlled to be greater than the number of the charge and discharge machines for the discharge test.

8. The system according to claim 1, characterized in that The switching element is a contactor.

9. The system according to claim 1, characterized in that The control unit, the switch element, the charger and discharger, and the battery pack are of the same number.

10. The system according to claim 1, characterized in that The control unit configures each of the chargers and dischargers to be controlled via two switching elements, one switching element being used to control the corresponding charger and discharger to work in a full-power charging mode, and the other switching element being used to control the corresponding charger and discharger to work in a full-power discharging mode.

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