A current collection device and energy storage system
By introducing a switching unit into the combiner device, a simplified splitting operation between energy storage modules is achieved, solving the high cost problem caused by the complexity of the splitting operation in the existing technology and improving the safety and stability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNWODA ELECTRONICS CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-10
AI Technical Summary
Existing combiner devices have complex processes for implementing splitting operations, resulting in high costs.
A switching unit is set in the combiner device. The closing state of the switching unit realizes the combiner operation between energy storage modules, and the opening state realizes the split operation, reducing manual rerouting operations.
It simplifies the traffic splitting process, reduces costs, and improves system security and stability.
Smart Images
Figure CN224481469U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of energy storage technology, specifically relating to a combiner device and an energy storage system. Background Technology
[0002] As an important component of an energy storage system, a combiner device is typically connected to multiple energy storage modules and is mainly used to realize the combining and splitting operations between multiple energy storage modules.
[0003] However, the process of implementing the splitting operation in existing combiner devices is relatively complex, which increases costs. Utility Model Content
[0004] This application aims to provide a combiner device and energy storage system to solve the problem that the process of implementing the splitting operation of existing combiner devices is relatively complex and increases costs.
[0005] To solve the above-mentioned technical problems, this application is implemented as follows:
[0006] In a first aspect, this application discloses a bus combiner, the bus combiner comprising:
[0007] A first busbar assembly, which is used for electrical connection with a first energy storage module;
[0008] The second busbar assembly is used for electrical connection with the second energy storage module;
[0009] And a switching unit, one end of which is connected to the first busbar component and the other end of which is connected to the second busbar component;
[0010] The switching unit has a closed state and an open state. In the closed state, the first energy storage module and the second energy storage module are connected to realize the merging operation between the first energy storage module and the second energy storage module. In the open state, the first energy storage module and the second energy storage module are disconnected to realize the shunting operation between the first energy storage module and the second energy storage module.
[0011] Optionally, the switching unit is a first circuit breaker, one end of which is connected to the first busbar assembly and the other end of which is connected to the second busbar assembly. The first circuit breaker has the closed state and the open state.
[0012] Optionally, the switching unit includes a load switch, one end of which is connected to the first busbar assembly and the other end of which is connected to the second busbar assembly. The load switch has a closed state and an open state.
[0013] Optionally, the switching unit further includes a fuse connected between the load switch and the first busbar assembly, or the fuse connected between the load switch and the second busbar assembly.
[0014] Optionally, it further includes a current detection unit, which is connected between the first bus component and the switching unit, or the current detection unit is connected between the switching unit and the second bus component, and the current detection unit is used to detect current when the switching unit is in the closed state.
[0015] Optionally, the first busbar assembly includes a first positive busbar and a first negative busbar, wherein the first positive busbar is used to be electrically connected to the positive terminal of the first energy storage module, and the first negative busbar is used to be electrically connected to the negative terminal of the first energy storage module.
[0016] The second busbar assembly includes a second positive busbar and a second negative busbar. The second positive busbar is used to be electrically connected to the positive terminal of the second energy storage module, and the second negative busbar is used to be electrically connected to the negative terminal of the second energy storage module.
[0017] One end of the switching unit is connected to the first positive busbar and the first negative busbar, and the other end is connected to the second positive busbar and the second negative busbar.
[0018] Optionally, the switching unit is also electrically connected to the control unit, which controls the switching unit to switch between the closed state and the open state.
[0019] Secondly, this application also discloses an energy storage system, which includes: the combiner device described in any of the above claims, a first energy storage module, and a second energy storage module;
[0020] The first energy storage module is electrically connected to the first combiner component of the combiner device;
[0021] The second energy storage module is electrically connected to the second busbar component of the busbar device.
[0022] Optionally, the energy storage system further includes a first converter and a second converter, wherein the first converter is electrically connected to the first combiner assembly, and the second converter is electrically connected to the second combiner assembly;
[0023] When the switching unit of the combiner device is in the closed state, the first converter, the second converter, the first energy storage module and the second energy storage module are connected.
[0024] When the switching unit of the combiner device is in the off state, the first energy storage module and the first converter are disconnected from the second converter and the second energy storage module.
[0025] Optionally, there are multiple first energy storage modules, second energy storage modules, first converters, and second converters.
[0026] In this embodiment, by setting a switching unit in the first and second bus components, the first and second energy storage modules are connected by making the switching unit closed, thus realizing the bus operation between the two energy storage modules. The first and second energy storage modules are disconnected by making the switching unit open, thus realizing the split operation between the two energy storage modules. This reduces the need for manual rewiring to achieve split operation, making the split operation simpler and more convenient, and reducing costs.
[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0028] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0029] Figure 1 This is a schematic diagram of the structure of an energy storage system provided in an embodiment of this application;
[0030] Figure 2 This is a schematic diagram of another energy storage system provided in an embodiment of this application;
[0031] Reference numerals: 1. Busbar device; 11. First busbar assembly; 111. First positive busbar; 112. First negative busbar; 12. Second busbar assembly; 121. Second positive busbar; 122. Second negative busbar; 13. Switching unit; 130. First circuit breaker; 14. Current detection unit; 2. First energy storage module; 3. Second energy storage module; 4. First converter; 5. Second converter; 6. Second circuit breaker; 7. Third circuit breaker. Detailed Implementation
[0032] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0033] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0035] As an important component of an energy storage system, a combiner device is typically connected between multiple energy storage modules and is mainly used to realize the combining and splitting operations between multiple energy storage modules.
[0036] In related technologies, combiner devices typically require manual rewiring to achieve the splitting operation between multiple energy storage modules, which makes the splitting operation process more complex and increases costs.
[0037] Based on the above analysis, this application provides a combiner device 1. In practical applications, the combiner device 1 can be used in energy storage systems. The combiner device 1 of this application will be described in detail below with reference to the accompanying drawings.
[0038] This application provides a current combining device 1, which includes: a first current combining component 11 for electrical connection with a first energy storage module 2; a second current combining component 12 for electrical connection with a second energy storage module 3; and a switching unit 13, one end of which is connected to the first current combining component 11 and the other end of which is connected to the second current combining component 12. The switching unit 13 has a closed state and an open state. In the closed state, the first energy storage module 2 and the second energy storage module 3 are connected to realize the current combining operation between the first energy storage module 2 and the second energy storage module 3. In the open state, the first energy storage module 2 and the second energy storage module 3 are disconnected to realize the current splitting operation between the first energy storage module 2 and the second energy storage module 3.
[0039] like Figure 1 As shown, specifically, both the first energy storage module 2 and the second energy storage module 3 are used to store electrical energy and release electrical energy for use by external electrical equipment when needed. The first energy storage module 2 and the second energy storage module 3 can be structures such as battery packs and energy storage containers.
[0040] Both the first busbar component 11 and the second busbar component 12 are busbars. The first busbar component 11 can be electrically connected to the first energy storage module 2 through a wiring harness, so that the electrical energy in the first energy storage module 2 can be output or input through the first busbar component 11. The second busbar component 12 can be electrically connected to the second energy storage module 3 through a wiring harness, so that the electrical energy in the second energy storage module 3 can be output or input through the second busbar component 12.
[0041] One end of the switching unit 13 is connected to the first bus assembly 11 via a wiring harness, and the other end is also connected to the second bus assembly 12 via a wiring harness. The switching unit 13 has a closed state and an open state, and can be switched between the closed state and the open state by manual or electric operation.
[0042] When the switching unit 13 is in the closed state, the first busbar component 11 and the second busbar component 12 are connected, and the first energy storage module 2 and the second energy storage module 3 are connected, so that the first energy storage module 2 and the second energy storage module 3 can perform current combining operation, and the first energy storage module 2 and the second energy storage module 3 can jointly supply power to the electrical equipment.
[0043] When the switching unit 13 is in the off state, the first bus component 11 and the second bus component 12 are connected, and the first energy storage module 2 and the second energy storage module 3 are disconnected, realizing the split operation between the first energy storage module 2 and the second energy storage module 3. The first energy storage module 2 and the second energy storage module 3 can supply power to different electrical devices independently.
[0044] In this embodiment, a switching unit 13 is provided in the first busbar component 11 and the second busbar component 12. By keeping the switching unit 13 in a closed state, the first energy storage module 2 and the second energy storage module 3 are connected, realizing the busbar operation between the two energy storage modules. By keeping the switching unit 13 in a closed state, the first energy storage module 2 and the second energy storage module 3 are disconnected, realizing the splitting operation between the two energy storage modules. This can reduce the need for manual rewiring to achieve splitting, making the splitting operation simpler and more convenient, and reducing costs.
[0045] Optionally, the switching unit 13 is a first circuit breaker 130, one end of which is connected to the first busbar assembly 11 and the other end is connected to the second busbar assembly 12. The first circuit breaker 130 has a closed state and an open state.
[0046] like Figure 1 As shown, the switching unit 13 is a first circuit breaker 130. The two ends of the first circuit breaker 130 are connected to the first busbar assembly 11 and the second busbar assembly 12 via wiring harnesses, respectively. In the closed state, the contacts inside the first circuit breaker 130 are in close contact, conducting the circuit between the first busbar assembly 11 and the second busbar assembly 12, allowing current to flow between the first energy storage module 2 and the second energy storage module 3. In the open state, the contacts of the first circuit breaker 130 separate, cutting off the circuit connection between the first energy storage module 2 and the second energy storage module 3, achieving current shunting. Furthermore, the first circuit breaker 130 has automatic protection functions such as overload protection and short-circuit protection.
[0047] It should be noted that the specific structure of the first circuit breaker 130 can refer to the prior art, and the embodiments of this application do not specifically limit it.
[0048] In practical applications, by making the switching unit 13 the first circuit breaker 130, the first circuit breaker 130 can perform busing or splitting operations between the first energy storage module 2 and the second energy storage module 3, and also has automatic protection functions such as overload protection and short circuit protection. When circuit overload or short circuit faults occur in the circuit, the first circuit breaker 130 can automatically disconnect the circuit, making the bus breaker 1 safer and more reliable during operation.
[0049] In some alternative embodiments, the switching unit 13 includes a load switch, one end of which is connected to the first bus assembly 11 and the other end of which is connected to the second bus assembly 12. The load switch has a closed state and an open state.
[0050] Specifically, when the switching unit 13 is a load switch, its two ends are connected to the first busbar assembly 11 and the second busbar assembly 12 via wiring harnesses, respectively. In the closed state, the contacts inside the load switch are in close contact, conducting the circuit between the first busbar assembly 11 and the second busbar assembly 12, allowing current to flow between the first energy storage module 2 and the second energy storage module 3. In the open state, the contacts of the load switch separate, cutting off the circuit connection between the first energy storage module 2 and the second energy storage module 3, thus achieving current shunting.
[0051] In practical applications, by making the switching unit 13 a load switch, the load switch can perform busbar or shunt operations between the first energy storage module 2 and the second energy storage module 3. Since the purchase cost of the load switch is lower than that of the first circuit breaker 130, the cost of the busbar device 1 can be reduced.
[0052] Optionally, the switching unit 13 may also include a fuse connected between the load switch and the first busbar assembly 11, or the fuse connected between the load switch and the second busbar assembly 12.
[0053] Specifically, the fuse can be connected in series between the load switch and the first busbar assembly 11, or the fuse can be connected in series between the load switch and the second busbar assembly 12.
[0054] In this embodiment, by setting a fuse, the fuse can cut off the circuit when an overload or short circuit occurs in the circuit, which can prevent the busbar device 1 and the first energy storage module 2 and the second energy storage module 3 from being damaged by excessive current, thereby improving the safety of the energy storage system. Furthermore, the busbar and the second energy storage module 3 are connected and split by a load switch, and the circuit is cut off by a fuse in case of overload or short circuit. That is, the combination of load switch and fuse replaces the first circuit breaker 130. Since the combination of load switch and fuse has a lower procurement cost than the first circuit breaker 130, the cost of busbar device 1 can be reduced.
[0055] In some optional embodiments, a current detection unit 14 is also included, which is connected between the first bus assembly 11 and the switching unit 13, or the current detection unit 14 is connected between the switching unit 13 and the second bus assembly 12. The current detection unit 14 is used to detect the current when the switching unit 13 is in a closed state.
[0056] Specifically, such as Figure 1As shown, the current detection unit 14 is connected in series between the first bus component 11 and the switching unit 13, or the current detection unit 14 is connected in series between the switching unit 13 and the second bus component 12. When the switching unit 13 is in the closed state, the first bus component 11, the second bus component 12, the first energy storage module 2 and the second energy storage module 3 are connected, so that the first energy storage module 2 and the second energy storage module 3 merge. The current detection unit 14 is used to continuously detect the current in the circuit after the first energy storage module 2 and the second energy storage module 3 merge.
[0057] After the first energy storage module 2 and the second energy storage module 3 merge, a circulating current problem occurs due to inconsistencies in parameters between them. When the circulating current is too large, it will reduce the safety and stability of the energy storage system. In practical applications, a current detection unit 14 is set up to continuously detect the current detected by the first energy storage module 2 and the second energy storage module 3 after they merge. The control unit of the energy storage system can compare the current detected by the current detection unit 14 with the allowable loop current in the energy storage system. When the current detected by the current detection unit 14 exceeds the allowable loop current, the control unit controls the energy storage system to perform shutdown protection, thereby improving the safety and stability of the energy storage system.
[0058] In some embodiments, the first bus assembly 11 includes a first positive bus 111 and a first negative bus 112. The first positive bus 111 is electrically connected to the positive terminal of the first energy storage module 2, and the first negative bus 112 is electrically connected to the negative terminal of the first energy storage module 2. The second bus assembly 12 includes a second positive bus 121 and a second negative bus 122. The second positive bus 121 is electrically connected to the positive terminal of the second energy storage module 3, and the second negative bus 122 is electrically connected to the negative terminal of the second energy storage module 3. One end of the switching unit 13 is connected to the first positive bus 111 and the first negative bus 112, and the other end is connected to the second positive bus 121 and the second negative bus 122, respectively.
[0059] Specifically, such as Figure 1 As shown, the first positive bus 111, the first negative bus 112, the second positive bus 121 and the second negative bus 122 can be copper bus, aluminum bus, etc., and multiple through holes are provided on the first positive bus 111, the first negative bus 112, the second positive bus 121 and the second negative bus 122.
[0060] One through hole on the first positive busbar 111 is connected to the positive terminal of the first energy storage module 2 via a wiring harness, and another through hole is connected to one end of the switching unit 13 via a wiring harness. One through hole on the first negative busbar 112 is connected to the negative terminal of the first energy storage module 2 via a wiring harness, and another through hole is connected to one end of the switching unit 13 via a wiring harness. One through hole on the second positive busbar 121 is connected to the positive terminal of the second energy storage module 3 via a wiring harness, and another through hole is connected to one end of the switching unit 13 via a wiring harness. One through hole on the second negative busbar 122 is connected to the negative terminal of the second energy storage module 3 via a wiring harness, and another through hole is connected to one end of the switching unit 13 via a wiring harness.
[0061] In practical applications, by separately setting up the first positive bus 111, the first negative bus 112, the second positive bus 121, and the second negative bus 122, it is convenient for the first energy storage module 2 and the second energy storage module 3 to connect to the corresponding positive and negative bus when connected. Furthermore, by connecting the positive and negative bus through the switching unit 13, the current sharing operation or current splitting operation between the two energy storage modules can be realized by keeping the switching unit 13 in a closed or open state, making the current splitting operation simpler and more convenient, and reducing costs.
[0062] In some embodiments, the switching unit 13 is also electrically connected to the control unit, which controls the switching unit 13 to switch between a closed state and an open state.
[0063] Specifically, the control unit can be the control system in the energy storage system, or the control unit can be a controller integrated on the switching unit 13. In practical applications, the control unit can control the switching unit 13 to automatically switch between the closed state and the open state, thereby accurately controlling the two energy storage modules to switch between the convergence and divergence modes according to the operating requirements of the energy storage system, and improving the efficiency of the energy storage system.
[0064] In summary, the combiner device 1 of this application embodiment may include at least the following advantages:
[0065] In this embodiment, a switching unit 13 is provided in the first busbar component 11 and the second busbar component 12. By keeping the switching unit 13 in a closed state, the first energy storage module 2 and the second energy storage module 3 are connected, realizing the busbar operation between the two energy storage modules. By keeping the switching unit 13 in a closed state, the first energy storage module 2 and the second energy storage module 3 are disconnected, realizing the splitting operation between the two energy storage modules. This can reduce the need for manual rewiring to achieve splitting, making the splitting operation simpler and more convenient, and reducing costs.
[0066] This application also provides an energy storage system, which may specifically include a combiner device 1, a first energy storage module 2 and a second energy storage module 3 as described in any of the above embodiments; the first energy storage module 2 is electrically connected to the first combiner component 11 of the combiner device 1; and the second energy storage module 3 is electrically connected to the second combiner component 12 of the combiner device 1.
[0067] It should be noted that in this embodiment, the structure of the combiner device 1 is the same as that of the combiner device 1 in any of the above embodiments, and its beneficial effects are similar, so it will not be described in detail here.
[0068] In some embodiments, the energy storage system further includes a first converter 4 and a second converter 5. The first converter 4 is electrically connected to the first busbar assembly 11, and the second converter 5 is electrically connected to the second busbar assembly 12. When the switching unit 13 of the busbar device 1 is in the closed state, the first converter 4, the second converter 5, the first energy storage module 2, and the second energy storage module 3 are connected to achieve the busbar operation between the first converter 4, the second converter 5, the first energy storage module 2, and the second energy storage module 3. When the switching unit 13 of the busbar device 1 is in the open state, the first energy storage module 2 and the first converter 4 are disconnected from the second converter 5 and the second energy storage module 3.
[0069] like Figure 1 As shown, specifically, the positive and negative terminals of the first converter 4 are respectively connected to the first positive busbar 111 and the first negative busbar 112 of the first busbar assembly 11 via wiring harnesses, and the positive and negative terminals of the second converter 5 are respectively connected to the second positive busbar 121 and the second negative busbar 122 of the second busbar assembly 12 via wiring harnesses.
[0070] When the switching unit 13 of the combiner device 1 is in the closed state, the first converter 4, the second converter 5, the first energy storage module 2 and the second energy storage module 3 are connected, which can realize the combiner operation between the first converter 4, the second converter 5, the first energy storage module 2 and the second energy storage module 3. At this time, the first converter 4 and the second converter 5 can charge or discharge the first energy storage module 2 and the second energy storage module 3.
[0071] When the switching unit 13 of the combiner device 1 is in the off state, the first energy storage module 2 and the first converter 4 are disconnected from the second converter 5 and the second energy storage module 3, which can realize the split operation between the first energy storage module 2 and the first converter 4 and the second energy storage module 3 and the second converter 5. At this time, the first converter 4 and the first energy storage module 2 are connected, and the first converter 4 is used to charge or discharge the first energy storage module 2 alone. The second converter 5 and the second energy storage module 3 are connected, and the second converter 5 is used to charge or discharge the second energy storage module 3 alone.
[0072] In practical applications, the switching unit 13 of the combiner device 1 enables the first converter 4, the second converter 5, the first energy storage module 2, and the second energy storage module 3 to conduct through the switching unit 13 in the closed state, thereby realizing the combiner operation between the two energy storage modules and the two converters. When the switching unit 13 is in the open state, the first energy storage module 2 and the second energy storage module 3 are disconnected, and the first energy storage module 2 and the first converter 4 are disconnected from the second converter 5 and the second energy storage module 3, thereby realizing the split operation between the two energy storage modules and the two converters. This reduces the need for manual rewiring to achieve split operation, making the split operation simpler and more convenient, and reducing costs.
[0073] Furthermore, the switching unit 13 is a first circuit breaker 130, which is connected between the first busbar assembly 11 and the second busbar assembly 12. The first converter 4 and the first energy storage module 2 are connected through the first busbar assembly 11, and the second converter 5 and the second energy storage module 3 are connected through the second busbar assembly 12. In this way, the power of the first circuit breaker 130 can be selected according to the power of the first converter 4 or the second converter 5, which reduces the power of the first circuit breaker 130 in the busbar device 1, thereby reducing the cost of the first circuit breaker 130 in the busbar device 1. At the same time, the smaller power of the first circuit breaker 130 reduces the size of the first circuit breaker 130, which can save more space in the busbar device 1 and improve the system space utilization.
[0074] like Figure 1 As shown, in some embodiments, a second circuit breaker 6 is provided between the first converter 4 and the first busbar assembly 11. The second circuit breaker 6 is used to control the connection and disconnection between the first converter 4 and the first busbar assembly 11. A third circuit breaker 7 is provided between the second converter 5 and the second busbar assembly 12. The third circuit breaker 7 is used to control the connection and disconnection between the second converter 5 and the second busbar assembly 12.
[0075] In another embodiment, such as Figure 2 As shown, another embodiment of the energy storage system is provided, which is related to... Figure 1 The difference in the energy storage system shown is that it only includes one second energy storage module 3. When the switching unit 13 is in the closed state, the first converter 4 and the second converter 5 can work together to charge or discharge the second energy storage module 3. In this way, when the capacity of the second energy storage module 3 is large, the first converter 4 and the second converter 5 can meet the charging and discharging requirements of the second energy storage module 3 with higher power. This avoids the need to change the power capacity of the converter, reduces the need to purchase high-power converters, and lowers costs.
[0076] It should be noted that the energy storage system may also include only one first energy storage module 2, and its technical effect is the same as that of the aforementioned system including only one second energy storage module 3, which will not be elaborated here.
[0077] Optionally, there are multiple first energy storage modules 2, second energy storage modules 3, first converters 4, and second converters 5.
[0078] Specifically, the number of through holes in the first positive busbar 111 and the first negative busbar 112 of the first busbar assembly 11 can be increased according to actual needs, so that the positive and negative terminals of multiple first energy storage modules 2 and multiple first converters 4 are connected to the corresponding through holes on the first positive busbar 111 and the first negative busbar 112 respectively through wire harnesses, so that the first busbar assembly 11 can be connected to multiple first energy storage modules 2 and multiple first converters 4; the number of through holes in the second positive busbar 121 and the second negative busbar 122 of the second busbar assembly 12... The number of second energy storage modules 3 and second converters 5 can be increased according to actual needs, so that the positive and negative terminals of multiple second energy storage modules 3 and multiple second converters 5 are connected to the corresponding through holes on the second positive busbar 121 and the second negative busbar 122 respectively through wire harnesses. This allows the second busbar assembly 12 to be connected to multiple second energy storage modules 3 and multiple second converters 5. In this way, when the switching unit 13 is in the closed state, multiple first energy storage modules 2, second energy storage modules 3, first converters 4 and second converters 5 can be combined, which can improve the combined power and capacity of the energy storage system.
[0079] The number of the first energy storage module 2, the second energy storage module 3, the first converter 4, and the second converter 5 can be the same or different. For example, the first energy storage module 2 can be 2, 3, 4, etc., the second energy storage module 3 can be 2, 3, 4, etc., the first converter 4 can be 2, 3, 4, etc., and the second converter 5 can be 2, 3, 4, etc. The embodiments of this application do not make specific limitations in this regard.
[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0081] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A combiner device, characterized in that, The combiner device (1) includes: A first busbar assembly (11) is used to be electrically connected to a first energy storage module (2); The second busbar assembly (12) is used for electrical connection with the second energy storage module (3); And a switching unit (13), one end of which is connected to the first busbar assembly (11) and the other end of which is connected to the second busbar assembly (12); The switching unit (13) has a closed state and an open state. In the closed state, the first energy storage module (2) and the second energy storage module (3) are connected to realize the merging operation between the first energy storage module (2) and the second energy storage module (3). In the open state, the first energy storage module (2) and the second energy storage module (3) are disconnected to realize the splitting operation between the first energy storage module (2) and the second energy storage module (3).
2. The combiner device according to claim 1, characterized in that, The switching unit (13) is a first circuit breaker (130), one end of which is connected to the first busbar assembly (11) and the other end is connected to the second busbar assembly (12). The first circuit breaker (130) has the closed state and the open state.
3. The combiner device according to claim 1, characterized in that, The switching unit (13) includes a load switch, one end of which is connected to the first busbar assembly (11) and the other end of which is connected to the second busbar assembly (12). The load switch has a closed state and an open state.
4. The combiner device according to claim 3, characterized in that, The switching unit (13) further includes a fuse, which is connected between the load switch and the first busbar assembly (11), or the fuse is connected between the load switch and the second busbar assembly (12).
5. The combiner device according to claim 1, characterized in that, It also includes a current detection unit (14), which is connected between the first bus assembly (11) and the switching unit (13), or the current detection unit (14) is connected between the switching unit (13) and the second bus assembly (12), and the current detection unit (14) is used to detect the current when the switching unit (13) is in the closed state.
6. The combiner device according to any one of claims 1-5, characterized in that, The first busbar assembly (11) includes a first positive busbar (111) and a first negative busbar (112). The first positive busbar (111) is used to be electrically connected to the positive terminal of the first energy storage module (2), and the first negative busbar (112) is used to be electrically connected to the negative terminal of the first energy storage module (2). The second bus assembly (12) includes a second positive bus (121) and a second negative bus (122). The second positive bus (121) is used to be electrically connected to the positive terminal of the second energy storage module (3), and the second negative bus (122) is used to be electrically connected to the negative terminal of the second energy storage module (3). One end of the switching unit (13) is connected to the first positive busbar (111) and the first negative busbar (112), and the other end is connected to the second positive busbar (121) and the second negative busbar (122).
7. The combiner device according to any one of claims 1-5, characterized in that, The switching unit (13) is also electrically connected to the control unit, which controls the switching unit (13) to switch between the closed state and the open state.
8. An energy storage system, characterized in that, The device includes the combiner device described in any one of claims 1-7, the first energy storage module (2), and the second energy storage module (3); The first energy storage module (2) is electrically connected to the first combiner assembly (11) of the combiner device (1); The second energy storage module (3) is electrically connected to the second busbar assembly (12) of the busbar device (1).
9. The energy storage system according to claim 8, characterized in that, The energy storage system further includes a first converter (4) and a second converter (5), wherein the first converter (4) is electrically connected to the first busbar assembly (11), and the second converter (5) is electrically connected to the second busbar assembly (12); When the switching unit (13) of the combiner device (1) is in the closed state, the first converter (4), the second converter (5), the first energy storage module (2) and the second energy storage module (3) are connected. When the switching unit (13) of the combiner device (1) is in the off state, the first energy storage module (2) and the first converter (4) are disconnected from the second converter (5) and the second energy storage module (3).
10. The energy storage system according to claim 9, characterized in that, There are multiple first energy storage modules (2), second energy storage modules (3), first converters (4) and second converters (5).