Assembled battery pack and energy storage equipment

Abstract

The invention relates to the technical field of energy storage, and discloses an assembled battery pack and energy storage equipment. The battery pack comprises a battery cell group, a control panel and a through-flow plate, a first splicing assembly is arranged on the control panel, so that the control panel is electrically connected with the battery cell group through the first splicing assembly; a second splicing assembly is arranged on the through-flow plate, so that the through-flow plate is electrically connected with the battery cell group through the second splicing assembly; the through-flow plate is further provided with a butt joint assembly so that the through-flow plate can be electrically connected with the control panel through the butt joint assembly, and the through-flow plate is used for conducting on-off control over an electrical loop in the assembled battery pack according to a control signal sent by the control panel. According to the battery pack, the control circuit part and the power on-off circuit part are split into the independent control board and the through-flow board from the board level, and different types of control boards and through-flow boards can be adaptively selected according to actual requirements to assemble the battery pack, so that the universality of the battery pack is improved; the whole battery pack is prevented from being replaced when the battery pack is not matched with the application scene, so that the maintenance cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an assembled battery pack and energy storage device. Background Art

[0002] At present, the development and design of a single battery pack are all integrated designs, in which all control circuits and power on-off circuits are integrated in a shell, and different types of battery packs are designed for different needs (such as series or parallel scenarios). Although such a design simplifies the assembly process of the battery pack, the battery packs designed for different scenario requirements are not universal. If the application scenario needs to be changed or a functional module in the battery pack needs to be upgraded (for example, replacing a new battery management system), the battery pack must be replaced as a whole. The battery pack has poor versatility, which leads to higher maintenance costs for the battery pack in the later stage. Summary of the invention

[0003] In view of this, in order to solve the technical problems of poor versatility and high maintenance cost caused by the integrated design of the battery pack in the prior art, an assembled battery pack and an energy storage device are provided.

[0004] In a first aspect, the present application provides an assembled battery pack, comprising:

[0005] Battery cell group;

[0006] A control board, wherein a first splicing component is provided on the control board so as to be electrically connected to the battery cell group through the first splicing component;

[0007] A flow plate, on which a second splicing assembly is provided, so as to be electrically connected to the battery cell group through the second splicing assembly;

[0008] The through-flow plate is also provided with a docking assembly to be electrically connected to the control board through the docking assembly. The through-flow plate is used to control the on-off of the electrical circuit in the assembled battery pack according to the control signal sent by the control board.

[0009] In an optional embodiment, the types of the through-flow plates include first-type through-flow plates, second-type through-flow plates, and third-type through-flow plates;

[0010] The first type of through-flow plate is applicable to a voltage range between a first voltage and a second voltage, and a current range between a first current and a second current;

[0011] The second type of through-flow plate is applicable to a voltage range greater than the second voltage and a current range not greater than the first current;

[0012] The third type of through-flow plate is applicable to a voltage range not greater than the first voltage, and a current range not less than the second current.

[0013] In an optional embodiment, the output positive electrode and the output negative electrode of the battery pack are connected to the positive terminal and the negative terminal of the battery cell group respectively;

[0014] The through-flow plate is disposed between the negative terminal of the battery cell group and the output negative electrode of the battery pack through the second splicing component, and the through-flow plate is also connected to the output positive electrode of the battery pack.

[0015] In an optional embodiment, the control panel further includes a first shell, the body of the control panel is placed in the first shell, and the first splicing assembly is arranged on the first shell.

[0016] In an optional embodiment, a first external communication interface is further provided on the first shell, and the control board communicates with an external battery pack or an external device through the first external communication interface.

[0017] In an optional embodiment, the control board is integrated with a collection unit and a control unit;

[0018] The collecting unit is used to collect the cell information of the cell group;

[0019] The control unit is used to generate a control signal based on the battery cell information; and send the control signal to the through-flow plate, so that the through-flow plate controls the connection state between the battery cell group and the output of the battery pack according to the control signal.

[0020] In an optional embodiment, the flow plate further includes a second shell, the body of the flow plate is placed in the second shell, and the second splicing assembly is arranged on the second shell.

[0021] In an optional embodiment, a second external communication interface is further provided on the second shell, and the flow plate communicates with an external battery pack or an external device through the second external communication interface.

[0022] In an optional embodiment, a switch unit is integrated on the flow plate, and the switch unit includes a charging switch and a discharging switch, and the charging switch and the discharging switch are connected in series and connected between the negative terminal of the battery cell group and the output negative electrode of the battery pack;

[0023] The switch unit is used to receive the control signal sent by the control board, so as to drive the internal charging switch or the discharging switch to close or turn off through the control signal, so as to realize the on-off control of the electrical circuit in the battery pack.

[0024] In an optional embodiment, the docking assembly includes one of a pluggable interface or a wiring harness terminal.

[0025] In a second aspect, the present application provides an energy storage device comprising at least one assembled battery pack as described above.

[0026] In an optional implementation, if there are multiple battery packs, each battery pack is connected in series in sequence and then connected to the same busbar;

[0027] The type of the through-flow plate in each of the battery packs is selected from the first type of through-flow plate and / or the second type of through-flow plate.

[0028] In an optional implementation, if there are multiple battery packs, each battery pack is connected in parallel to the same busbar;

[0029] The type of the through-flow plate in each of the battery packs is the first type of through-flow plate and / or the third type of through-flow plate.

[0030] In an optional embodiment, the energy storage device further includes a main control box; the main control box and each of the battery packs are connected to the same busbar;

[0031] The main control box is connected to each of the battery packs and is used to send a target indication signal to the target battery pack, wherein the target indication signal is used to instruct the control board to perform on-off control on the electrical circuit of the target battery pack through the flow plate.

[0032] In an optional embodiment, the energy storage device further includes a current conversion module;

[0033] Each of the battery packs is connected to the busbar through the converter module; the converter module is used to convert the electric energy output by the battery pack and input it to the busbar, or to convert the electric energy output by the busbar and input it to the battery pack;

[0034] And / or, each of the battery packs and the converter module are respectively connected to the same busbar; the converter module is used to convert the electric energy input to the busbar by each of the battery packs and then output it.

[0035] The embodiments of the present application have the following beneficial effects:

[0036] The present embodiment provides an assembled battery pack, including a battery cell group, a control board and a flow plate; a first splicing component is provided on the control board to be electrically connected to the battery cell group through the first splicing component; a second splicing component is provided on the flow plate to be electrically connected to the battery cell group through the second splicing component; a docking component is also provided on the flow plate to be electrically connected to the control board through the docking component, and the flow plate is used to control the on-off of the electrical circuit in the assembled battery pack according to the control signal sent by the control board. In the present embodiment, the control circuit part and the power on-off circuit part are separated into independent control boards and flow plates at the board level, and different types of control boards and flow plates can be adaptively selected according to actual needs to assemble the battery pack, and the corresponding parts in the battery pack can also be adaptively replaced according to actual needs, so that the battery pack can be compatible with different application scenarios with very small changes, avoiding the problem that the entire battery pack needs to be replaced when the battery pack function is not suitable for the application scenario, resulting in huge product cost and low flexibility in the use of the battery pack, improving the versatility of the battery pack, and significantly reducing the manufacturing and maintenance costs of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope of protection of the present application. For ordinary technicians in this field, other related drawings can also be obtained based on these drawings without creative work.

[0038] Figure 1 A schematic diagram showing the structure of each block module in the assembled battery pack in an embodiment of the present application is shown;

[0039] Figure 2 A first structural schematic diagram of an assembled battery pack in an embodiment of the present application is shown;

[0040] Figure 3 A second structural schematic diagram of an assembled battery pack in an embodiment of the present application is shown;

[0041] Figure 4 A third structural schematic diagram of an assembled battery pack in an embodiment of the present application is shown;

[0042] Figure 5 A schematic diagram of an application scenario of a battery cluster including a plurality of assembled battery packs connected in series in an embodiment of the present application is shown;

[0043] Figure 6 A schematic diagram of an application scenario of a battery cluster including a plurality of assembled battery packs connected in parallel in an embodiment of the present application is shown;

[0044] Figure 7 A first structural schematic diagram of an energy storage device in an embodiment of the present application is shown;

[0045] Figure 8 A second structural schematic diagram of the energy storage device in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0047] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0048] Hereinafter, the terms "including", "having" and their cognates, which may be used in various embodiments of the present application, are intended only to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items or adding the possibility of one or more features, numbers, steps, operations, elements, components, or combinations of the foregoing items.

[0049] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0050] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0051] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0052] The embodiment of the present application provides an assembled battery pack (hereinafter referred to as the battery pack), which splits and combines the control part and the power switching part at the board level to form a separate control board 200 and a flow board 300, which can be spliced ​​and combined with the battery cell group 100 to form a complete battery pack. Therefore, this embodiment can assemble the corresponding battery pack according to actual needs, so that the battery pack can be compatible with different application scenarios, thereby improving the versatility of the battery pack.

[0053] For reference, Figure 1 and Figure 2 As shown, the assembled battery pack includes a battery cell group 100, a control board 200 and a flow plate 300; wherein, a first splicing component is provided on the control board 200, and the control board 200 is electrically connected to the battery cell group 100 through the first splicing component; a second splicing component is provided on the flow plate 300, and the flow plate 300 is electrically connected to the battery cell group 100 through the second splicing component; and, a docking component 330 is also provided on the flow plate 300, and the flow plate 300 is electrically connected to the control board 200 through the docking component. Obviously, in this embodiment, an independent battery pack can be obtained by assembling the control board 200 and the flow plate 300 using the docking components on the control board 200 and the flow plate 300, and combining and splicing the respective splicing components with the battery cell group 100.

[0054] It should be noted that the control board 200 and the battery cell group 100, as well as the flow plate 300 and the battery cell group 100, are spliced ​​together through corresponding splicing components, so that the control board 200 and the flow plate 300 can achieve complex functional requirements through the splicing components; and when the control board 200 and the flow plate 300 are docked through the docking components, data exchange and function calls can be realized between the board levels, ensuring the coordinated work between the control board 200 and the flow plate 300.

[0055] It can be understood that in order to improve the flexibility of the battery pack in multi-scenario applications, this embodiment separates the control circuit and the power on-off circuit in the battery pack to form a separate control board 200 and a flow plate 300, and designs standardized docking components and splicing components for the control board 200 and the flow plate 300, so that they can be easily connected and disassembled, and the various parts in the battery pack can be replaced simply and quickly later, thereby achieving more flexible application and maintenance. Moreover, since the control board 200 and the flow plate 300 can be regarded as independent and detachable module structures, therefore, in actual use, different control boards 200 or flow plates 300 inside the battery pack can be replaced according to the requirements of different application scenarios or loads, thereby improving the flexibility and maintenance convenience of the battery pack in multi-scenario applications.

[0056] Furthermore, if Figure 3 and Figure 4As shown, in a single assembled battery pack, the positive terminal (i.e., B+) of the battery cell group 100 is connected to the output positive pole (i.e., P+) of the battery pack, and the negative terminal (i.e., B-) of the battery cell group 100 is connected to the output negative pole (i.e., P-) of the battery pack, and the through-flow plate 300 is arranged between the negative terminal of the battery cell group 100 and the output negative pole of the battery pack, and the through-flow plate 300 is also connected to the control board 200, and then the through-flow plate 300 is used to control the connection state between the battery cell group 100 and the output negative pole of the battery pack according to the control signal sent by the control board 200, so as to realize the on-off control of the electrical circuit of the battery pack.

[0057] Exemplarily, the battery cell group 100 includes a plurality of battery cells, which are connected in series in sequence. The positive terminal of the battery cell group 100 is connected to the output positive electrode of the battery pack, and the negative terminal of the battery cell group 100 is connected to the output negative electrode of the battery pack; further, after the battery cells are connected in series in sequence, the positive terminal of the first battery cell is connected to the output positive electrode of the battery pack, and the negative terminal of the last battery cell is connected to the output negative electrode of the battery pack.

[0058] The number of battery cells in each battery cell group 100 can be set according to actual needs, thereby forming battery cell groups 100 with different battery capacities, and each battery cell group 100 is used to assemble battery packs with different battery capacities; subsequently, users can select battery cell groups 100 with appropriate battery capacities according to actual needs to assemble battery packs that meet the needs.

[0059] In some examples, the battery cell group 100 also includes a third shell, which is used to cover the body of the battery cell group 100; optionally, a accommodating cavity is provided inside the third shell, and the accommodating cavity is used to place each battery cell; a plurality of third splicing components are also provided on the third shell, and the battery cell group 100 is electrically connected to the control board 200 and the flow plate 300 respectively through the corresponding third splicing components, wherein the type, setting position and number of the third splicing components can be set according to actual needs, and this embodiment does not limit this; for example, the third splicing component can be selected from wiring harness terminals, etc.

[0060] Furthermore, the third splicing component may correspond to an internal communication interface of the battery cell group 100 or a corresponding internal communication interface may be provided on the third shell, and the battery cell group 100 communicates with the control board 200 and the flow plate 300 respectively through the internal communication interface.

[0061] In one example, one or more external communication interfaces may be provided on the third housing, and the battery pack 100 may communicate with an external device or an external battery pack through the external communication interface. The type, location and number of the external communication interface may be set according to actual needs, and this embodiment does not limit this.

[0062] In this embodiment, the internal structure of the battery cell group 100 and its third shell can be set accordingly according to actual needs; for example, the discharge position and direction of each battery cell in the accommodating cavity, as well as the hardware line routing between the battery cells, etc. can be set.

[0063] In this embodiment, the control board 200 in a single battery pack can be integrated with components for realizing functions such as data collection, storage, calculation, power switch control, etc., so that the control board 200 can be used to realize the collection of cell information such as voltage, temperature, current, etc. of cells with different numbers of strings in the compatible cell group 100, as well as data storage, data calculation, external communication, power switch control, pre-charge signal control, current limiting, heating signal control, etc. Among them, the setting positions and circuit routings between the various components on the control board 200 can be adaptively set according to actual needs, and this embodiment does not limit them.

[0064] In this embodiment, various components on the control board 200 that are used to combine to implement a function can be virtualized to form a functional unit, and each functional unit is used to implement one or more functions.

[0065] For example, the control board 200 is integrated with a collection unit 210 and a control unit 220; wherein the collection unit 210 is used to collect cell information of the cell group 100; the cell information includes but is not limited to physical quantities such as voltage, temperature, and current of each cell in the cell group 100.

[0066] The control unit 220 is used to process the battery cell information collected by the collection unit 210, for example, to calculate corresponding performance parameters (such as SOC, etc.) based on the battery cell information, and to generate a control signal according to the battery cell information and the performance parameters, and the control signal is used to realize the power switch control of the battery pack; wherein, the control unit 220 sends the control signal to the through-flow plate 300, so that the through-flow plate 300 controls the connection state between the battery cell group 100 and the negative output electrode of the battery pack based on the control signal, thereby realizing the power switch control of the battery pack.

[0067] In some examples, the control board 200 may also integrate components for implementing functions such as pre-charging signal control, current limiting, and heating signal control to form a pre-charging signal control unit, a current limiting control unit, a heating signal control unit, and the like.

[0068] Furthermore, the control board 200 also includes a first shell, which is used to cover the body of the control board 200, that is, the body of the control board 200 is placed inside the first shell.

[0069] The first splicing component of the control board 200 can be arranged on the first housing, and the control board 200 is electrically connected to the battery pack 100 through the first splicing component, that is, the first splicing component of the control board 200 is connected to the third splicing component of the battery pack 100. The type, setting position and quantity of the first splicing component can be set according to actual needs, and this embodiment does not limit this.

[0070] In some examples, the first splicing component on the first shell can correspond to an internal communication interface of the control board 200 or an internal communication interface is set on the first shell, and the control board 200 communicates with the battery cell group 100 through such internal communication interface.

[0071] Furthermore, the control board 200 further includes a docking assembly 230, which can also be disposed on the first housing, wherein the control board 200 is electrically connected to the flow plate 300 via the docking assembly 230 disposed on the first housing; that is, the docking assembly 230 of the control board 200 is connected to the docking assembly 330 of the flow plate 300. The type, location and quantity of the docking assembly 230 can be specifically set according to actual needs, and this embodiment does not limit this.

[0072] Optionally, the docking assembly 230 on the first shell can serve as another internal communication interface of the control board 200 or another internal communication interface is provided on the first shell, and the control board 200 communicates with the flow plate 300 through such internal communication interface.

[0073] In one example, one or more external communication interfaces may be provided on the first housing, and the control board 200 communicates with an external device or an external battery pack through the external communication interface. The type, location and number of the external communication interface may be set according to actual needs, and this embodiment does not limit this.

[0074] In this embodiment, the structure of the control board 200 and its first shell can be arranged accordingly according to actual needs; for example, a accommodating cavity can also be arranged in the first shell to place the main body of the control board 200, or the arrangement position and direction of each component on the control board 200, as well as the hardware line routing between each component, etc. can be arranged as needed.

[0075] In this embodiment, the flow plate 300 in a single battery pack is connected to the battery cell group 100 through the second splicing component. Specifically, the flow plate 300 is arranged between the negative end of the battery cell group 100 and the output negative pole of the battery pack through the second splicing component, so that the battery cell group 100 is connected to the output negative pole of the battery pack through the flow plate 300; and the flow plate 300 is also connected to the output positive pole of the battery pack.

[0076] The through-flow plate 300 performs a switch control function in the battery pack; specifically, the through-flow plate 300 is connected to the control board 200 via the docking assembly 330 to receive a control signal sent by the control board 200, and controls the connection state between the battery cell group 100 and the output negative pole of the battery pack according to the control signal to achieve on-off control of the battery pack's charge and discharge circuits, and further achieve on-off control of the electrical circuit in the battery pack.

[0077] Furthermore, the flow plate 300 can be integrated with components for physically controlling the on and off of the electrical circuit of the battery pack, as well as realizing functions such as heating control, pre-charging control, current limiting control, and total circuit insurance protection; wherein, the setting positions and circuit routings of the various components on the flow plate 300 can be adaptively set according to actual needs, and this embodiment is not limited thereto.

[0078] Furthermore, the components on the flow plate 300 that are used to combine to achieve a function can be virtualized to form a functional unit, and each functional unit is used to achieve one or more functions.

[0079] For example, a switch unit 310 is integrated on the through-flow plate 300 , and the switch unit 310 is used to control the connection state between the battery cell group 100 and the output negative electrode of the battery pack according to the control signal sent by the control board 200 .

[0080] The switch unit 310 includes a charging switch and a discharging switch, wherein the charging switch and the discharging switch are connected in series and arranged between the output negative electrode of the battery pack and the negative terminal of the battery cell group 100. The switch unit 310 is used to receive a control signal sent by the control board 200, so as to drive the internal charging switch or discharging switch through the control signal, and then control the closing or closing of the charging switch and the discharging switch, thereby controlling the connection state between the battery cell group 100 and the output negative electrode of the battery pack, that is, closing or closing the charging and discharging circuit of the battery pack. The device type and setting quantity of the charging switch and the discharging switch are not limited here.

[0081] In some examples, the through-flow plate 300 is further integrated with a protection unit 320, and the protection unit 320 includes a fuse, and the protection unit 320 is used to fuse itself to cut off the loop current when the current in the through-flow plate 300 abnormally rises to a certain height and temperature, thereby ensuring the safe operation of the battery pack. The type of fuse used in this embodiment can be determined according to actual needs and is not limited thereto.

[0082] In other examples, components for implementing functions such as pre-charging, current limiting, heating, and circuit protection may be integrated on the flow plate 300 to form a pre-charging unit, a current limiting unit, a heating unit, and a protection unit 320, etc.

[0083] In practical applications, different types of through-flow plates 300 can be integrated according to the selection of various components inside the through-flow plate 300 to meet different needs; for example, the through-flow plate 300 can be divided into a first type of through-flow plate 300, a second type of through-flow plate 300 and a third type of through-flow plate 300; wherein the voltage range and current range applicable to different types of through-flow plates 300 are different; for example, the voltage range applicable to the first type of through-flow plate 300 (i.e., conventional through-flow plate 300) can be set to be between the first voltage and the second voltage, and the current range can be between the first current and the second current; the voltage range applicable to the second type of through-flow plate 300 (i.e., high-voltage through-flow plate 300) is greater than the second voltage, and the current range is not greater than the first current; the voltage range applicable to the third type of through-flow plate 300 (i.e., high-current through-flow plate 300) is not greater than the first voltage, and the current range is not less than the second current. wherein, the values ​​of the first voltage, the second voltage, the first current and the second current can be set according to actual needs, and this embodiment does not limit this.

[0084] That is, when constructing the flow plate 300, if higher insulation requirements and stronger voltage resistance are considered, and the device types selected are all devices with higher voltage resistance and better insulation, then a high-voltage flow plate 300 can be constructed; the high-voltage flow plate 300 is suitable for application scenarios with high voltage but not very large current requirements, for example, the type of the high-voltage flow plate 300 can be 200V100A.

[0085] If economic benefits are taken into consideration when constructing the flow plate 300 and devices with relatively low insulation requirements and voltage resistance are selected, a large current flow plate 300 can be constructed; the large current flow plate 300 is suitable for application scenarios with lower voltage and larger current output, such as current output of 200A and above; and the type of the large current flow plate 300 can be 48V200A; in addition, a conventional flow plate 300 can also be designed to meet basic daily needs, and the applicable current range and voltage range are relatively low, and the type of the conventional flow plate 300 can be 48V100A.

[0086] When assembling a single battery pack later, the appropriate type of through-flow plate 300 (i.e., high-voltage through-flow plate 300, high-current through-flow plate 300, or conventional through-flow plate 300) can be selected for splicing and combination according to actual needs (such as outputting higher power, etc.). Alternatively, different through-flow plates 300 can be selected for replacement in the same battery pack according to different application scenarios.

[0087] In one example, the flow plate 300 further includes a second shell, and the second shell is used to cover the body of the flow plate 300 , that is, the body of the flow plate 300 is disposed inside the second shell.

[0088] Furthermore, a second splicing component of the flow plate 300 can be arranged on the second shell, and the flow plate 300 is spliced ​​with the battery cell group 100 through the second splicing component, wherein the type, setting position and quantity of the second splicing component can be set according to actual needs, and this embodiment does not limit this.

[0089] As a feasible implementation, the second splicing assembly on the second shell can correspond to an internal communication interface of the flow plate 300 or a corresponding internal communication interface is set on the second shell, and the flow plate 300 communicates with the battery cell group 100 through this type of internal communication interface.

[0090] In addition, the docking assembly 330 of the flow plate 300 can also be set on the second shell, and the flow plate 300 is spliced ​​with the control board 200 through the docking assembly 330, wherein the type, setting position and number of the docking assembly 330 can be set according to actual needs, and this embodiment does not limit this.

[0091] As a feasible implementation, the docking assembly 330 on the second shell can correspond to an internal communication interface of the flow plate 300 or a corresponding internal communication interface is set on the second shell, and the flow plate 300 communicates with the control board 200 through this type of internal communication interface.

[0092] In this embodiment, the flow plate 300 and the control board 200 in a single battery pack can be connected in a pluggable manner or a terminal harness manner, that is, the docking assembly of the flow plate 300 and the control board 200 includes any one of a pluggable interface and a harness terminal.

[0093] Among them, the types of the pluggable interface include a socket type and a plug type with metal pins. The plug can be inserted into the corresponding socket to connect the signal and power in the circuit. Specifically, the plug includes a plurality of components such as a plug handle, a pin, a spring, etc., and the socket includes a plurality of slots for connecting with the plug pins; by inserting the plug into the socket, the pins on the plug are directly connected to the contact pin contacts in the socket, so that the purpose of signal transmission can be achieved; in this embodiment, the connection between the plug and the socket can be selected such as single-row pins, double-row pins and column pins, that is, the pins in the plug can be set to different types such as single-row pins, double-row pins and column pins.

[0094] Among them, if the docking component of the flow plate 300 is a pluggable interface in the form of a plug, then the docking component of the control board 200 corresponds to a pluggable interface in the form of a socket; conversely, if the docking component of the flow plate 300 is a pluggable interface in the form of a socket, then the docking component of the control board 200 corresponds to a pluggable interface in the form of a plug.

[0095] The types of the above-mentioned harness terminals include plug-in type and threaded type; the harness terminal includes a conductor, a terminal body, a housing, etc. Among them, the plug-in harness terminal is to pre-insert the copper core wire of the wire used to connect the external module or device into its own terminal, and then clamp the copper core wire and the conductor by crimping; the threaded harness terminal is to connect the wire used to connect the external module or device with its own terminal by tightening the thread.

[0096] In some examples, an external communication interface of the through-flow plate 300 may be provided on the second housing, and the through-flow plate 300 communicates with an external device or an external battery pack through the external communication interface. The type, location and number of the external communication interface may be set according to actual needs, and this embodiment does not limit this.

[0097] In this embodiment, the structure of the above-mentioned flow plate 300 and its second shell can be set accordingly according to actual needs; for example, a accommodating cavity can also be set in the second shell to place the body of the flow plate 300, or the discharge position and direction of each component on the flow plate 300, as well as the hardware line routing between each component, etc. can be set as needed.

[0098] In this embodiment, when the battery cell group 100, the control board 200 and the flow plate 300 in a single battery pack are connected and communicated with an external device or an external battery pack respectively, the connection mode includes physical connection and communication connection. If the connection mode is physical connection, the external communication interface of the battery cell group 100, the control board 200 and the flow plate 300 can be set as a wired interface or a wireless interface such as the aforementioned pluggable interface or wiring harness terminal; if the connection mode is communication connection, the external communication interface of each part can be set as a network protocol interface (such as a CAN bus interface) or a serial communication interface (such as an SPI interface). Among them, the specific connection mode between a single battery pack and an external device or an external battery pack and the type of the corresponding communication interface can be set according to actual needs, and this embodiment does not limit it.

[0099] In this embodiment, the control part and the power control part in the battery pack are decomposed at the board level to obtain the control board 200 and the flow plate 300 respectively. The control board 200, the flow plate 300 and the battery cell group 100 of any capacity are randomly combined and assembled to obtain multiple battery packs, and each part inside each battery pack (control board 200, flow plate 300 and battery cell group 100) can be an independently detachable modular structure, that is, this embodiment can realize the disassembly and combination of any type of control board 200, flow plate 300 and battery cell group 100, so as to meet various requirements such as assembling a single battery pack or a battery cluster, and later on, based on the detachability of each module in the battery pack, some of the internal modules can be adaptively replaced in different application scenarios to meet different scenario requirements and facilitate later maintenance, while avoiding the need to replace the entire battery pack when the application scenario changes, so that one battery pack can be compatible with multiple different scenarios such as high voltage and low voltage, saving the production cost of the battery pack and greatly enhancing the versatility and reuse rate of the battery pack.

[0100] In this embodiment, after the control board 200, the flow plate 300 and the battery cell group 100 are spliced ​​and combined into a single battery pack, in order to meet different application requirements, the multiple battery packs spliced ​​and combined in the aforementioned embodiments can be combined and applied in series or parallel, so as to be applied to scenarios requiring multiple battery packs, thereby improving the versatility of the battery pack and expanding the scope of application scenarios.

[0101] Exemplarily, an energy storage device or energy storage system includes a battery cluster, which includes multiple battery packs connected in series or in parallel, and each battery pack is assembled by splicing a cell group 100, a flow plate 300 and a control board 200 of a block module structure. The number of battery packs connected in series or in parallel in the battery cluster can be set according to actual needs, and this embodiment does not limit this. The above-mentioned energy storage device or energy storage system includes devices or systems such as two-wheeled electric vehicles, electric vehicles, and household appliances.

[0102] In one embodiment, in a battery cluster formed by multiple battery packs connected in series, each battery pack is connected in sequence through a communication bus, and each battery pack can be connected to the same busbar (including a positive busbar and a negative busbar); wherein the communication bus can be selected from CAN bus, RS485 bus, SPI bus, etc., and can be set according to actual needs. Optionally, the battery cluster can be provided with 2, 3, 4, etc. battery packs connected in series in sequence; the number of battery packs in the battery cluster can also be set according to actual needs, and this embodiment does not limit it.

[0103] For example, Figure 5As shown, the control boards 200 of each battery pack in the battery cluster are connected via a CAN bus, and the battery packs in the battery cluster are connected in series in sequence and then connected to the busbar; wherein, the current plate 300 of the first battery pack is connected to the positive busbar, and the current plate 300 of the last battery pack is connected to the negative busbar.

[0104] It should be noted that, in actual use, if the battery cluster is required to output greater power, the through-flow plate 300 of each battery pack in the battery cluster can be replaced with a first-type through-flow plate 300 (i.e., a conventional through-flow plate 300) or a second-type through-flow plate 300 (i.e., a high-voltage through-flow plate 300), or the first-type through-flow plate 300 and the second-type through-flow plate 300 can be used to replace each other, so as to meet corresponding needs.

[0105] Furthermore, the battery cluster can realize functions such as cell information collection of each battery pack, current collection of the total circuit, temperature monitoring, etc., so as to monitor the working status of each battery pack, and when an abnormal situation is detected or a corresponding shutdown control signal is received, any internal battery pack can be controlled to cut off its own charging and discharging circuit, thereby realizing the shutdown of the charging and discharging circuit of the entire battery cluster, so as to ensure the safety and stability of the entire battery cluster.

[0106] For example, if the battery cluster determines that a battery pack inside it is abnormal, the control board 200 inside the first battery pack drives the charging switch and the discharging switch in the flow plate 300 in the same battery pack to be in the off state, thereby shutting off its own charging and discharging circuits to achieve self-protection, and at the same time disconnecting the charging and discharging circuits of other battery packs in the battery cluster (i.e., cutting off the total charging and discharging circuit of the battery cluster), thereby ensuring the safety of the entire battery cluster.

[0107] Optionally, after cutting off the total charge and discharge circuit of the battery cluster, the flow plates 300, control board 200 and cell group 100 of each battery pack can also be disassembled. The disassembled flow plates 300 can be assembled with other parts (control board 200 and cell group 100) into different battery packs, thereby realizing the reuse of each modular structure to save the manufacturing and maintenance costs of the battery pack.

[0108] In another embodiment, in a battery cluster formed by multiple battery packs connected in parallel, each battery pack is connected in sequence through a communication bus, and each battery pack can be connected to the same busbar (including a positive busbar and a negative busbar); wherein the communication bus can be selected from CAN bus, RS485 bus, SPI bus, etc., and can be set according to actual needs. Optionally, the battery cluster can be provided with 2, 3, 4, etc. battery packs connected in parallel; the number of battery packs in the battery cluster can also be set according to actual needs, and this embodiment does not limit it.

[0109] For example, Figure 6As shown, the control boards 200 of each battery pack in the battery cluster are connected via a CAN bus, and each battery pack in the battery cluster is connected to a busbar.

[0110] It should be noted that during actual use, if the battery cluster is required to output greater power, the through-flow plates 300 of each battery pack in the battery cluster can be replaced with the first type of through-flow plates 300 (i.e., conventional through-flow plates 300) or the third type of through-flow plates 300 (i.e., low-pressure through-flow plates 300), or the low-pressure through-flow plates 300 and conventional through-flow plates 300 can be used interchangeably to meet corresponding needs.

[0111] Furthermore, the battery cluster can realize functions such as cell information collection of each battery pack, current collection of the total circuit, temperature monitoring, etc., so as to monitor the working status of each battery pack, and when an abnormal situation is detected in a battery pack or a corresponding shutdown control signal is received, the target battery pack can be controlled to cut off its own charging and discharging circuits, thereby realizing self-protection of a single battery pack and improving the overall safety and stability of the battery cluster.

[0112] For example, if the battery cluster determines that the second battery pack inside it is abnormal, the control board 200 inside the second battery pack drives the charging switch and the discharging switch in the flow plate 300 in the same battery pack to be in the off state, and then shuts off its own charging and discharging circuits to achieve self-protection of the single battery pack to avoid affecting the operating status of the entire battery cluster.

[0113] In some examples, the energy storage device or energy storage system further includes a main control box 400, which can be disposed inside a battery cluster or independently of a battery cluster, wherein the battery cluster is a battery cluster including a plurality of battery packs connected in series or in parallel. If the energy storage device or energy storage system includes only one battery pack, the main control box 400 can be disposed inside the battery pack or independently of the battery pack.

[0114] The following description takes an energy storage device including a battery cluster as an example, wherein the scenarios of an energy storage device including a single battery pack and an energy storage device including a battery cluster are the same, and therefore will not be described in detail.

[0115] For reference, Figure 7 As shown, the main control box 400 is set independently of the battery cluster and connected to the same busbar as each battery pack in the battery cluster. The main control box 400 is used to implement switch control to control the connection status of each battery pack in the battery cluster and the busbar; the main control box 400 is also used to implement charge and discharge control of the battery cluster to control the charge and discharge status of the battery cluster.

[0116] Furthermore, the main control box 400 is connected to the control board 200 inside each battery pack for communication, so as to obtain the cell information or status signal of each battery pack, and send a target signal to the control board 200 .

[0117] For example, the main control box 400 can be connected to the control board 200 inside each battery pack through the CAN bus, and send a target indication signal to the control board 200 of any battery pack, where the target indication signal is used to instruct the control board 200 of the target battery pack to drive the charging switch or discharging switch inside the through-flow plate 300 to close or turn off, so as to achieve the switching of the target battery pack to the busbar; that is, the control board 200 of the target battery pack sends a control signal to the through-flow plate 300 according to the target indication signal, so as to control the through-flow plate 300 to drive the internal charging switch or discharging switch, and then control the closing or turning off of the charging switch and the discharging switch, so as to control the switching of the battery cell group 100 in the same battery pack to the busbar, that is, to close or turn off the charging and discharging circuit of the target battery pack, so as to achieve the switch control or charging and discharging control of the battery pack.

[0118] For example, if the target indication signal is used to indicate that the target battery pack enters a charging state, the control board 200 of the target battery pack sends a control signal to the connected flow plate 300 after receiving the target indication signal. The control signal is used to drive the charging switch inside the flow plate 300 to control the charging switch to close, thereby closing the charging circuit of the target battery pack, thereby causing the target battery pack to enter a charging state.

[0119] Alternatively, the main control box 400 can also collect the cell information of each battery pack through the control board 200 inside each battery pack to generate a target indication signal based on the cell information and send the target indication signal to the target battery pack. The control board 200 of the target battery pack then sends a control signal to the through-flow plate 300 according to the target indication signal to control the through-flow plate 300 to drive the internal charging switch or discharging switch to close or open, so as to realize the closing or opening of the charging and discharging circuit of the target battery pack.

[0120] In another example, the energy storage device or energy storage system further includes a converter module, which can be disposed inside a battery cluster or independently of the battery cluster, wherein the battery cluster includes the aforementioned multiple battery packs connected in series or in parallel.

[0121] Among them, if the inverter module and each battery pack in the battery cluster are connected to the same busbar (positive busbar and negative busbar), it is used to convert the electric energy input from the battery cluster to the busbar into the type of electric energy required by the energy storage device, the energy storage system or the external device, so as to input the converted electric energy to the energy storage device, the energy storage system or the external device to realize the discharge of the battery cluster; or, convert the external electric energy input to the busbar into the type of electric energy required by the battery cluster, so as to input the converted electric energy to the battery cluster to realize the charging of the battery cluster.

[0122] If the battery cluster is connected to the busbar through the converter module, the converter module is used to convert the electric energy output by the battery cluster and input it to the busbar, or to convert the electric energy output by the busbar and input it to the battery cluster.

[0123] The conversion module includes but is not limited to a conversion unit and a control unit, etc. The AC unit in the conversion module is used to realize the conversion between different types of electric energy; the control unit is used to monitor and control the output frequency of the AC unit, etc., to ensure the stable output of the AC module.

[0124] The converter unit can be configured as a DC / AC bidirectional converter unit or a DC / DC converter unit, etc. The type and quantity of the functional units inside the converter module can be adaptively configured according to actual needs, and this embodiment does not limit this.

[0125] For example, the AC unit is also used to communicate with the control unit 220 of each battery pack in the battery cluster to obtain status information of each battery pack, which status information includes information such as battery cell information and working status of the battery pack. The AC unit is also used to control the frequency of the power conversion output based on the status information to achieve protective charging and discharging of the battery cluster and ensure the safe operation of the battery cluster.

[0126] As a feasible implementation method, similar to the scenario of the energy storage device including the battery cluster mentioned above, in the actual use of the energy storage device including a single battery pack, the single battery pack can also be connected to the converter (or converter module), and the converter is used to adjust the type of electric energy input or output of the battery pack, that is, to convert the type of electric energy input from the busbar or output to the busbar of the battery pack, so as to realize the charging and discharging application of the single battery pack. Among them, during the charging process of the battery pack, the electric energy on the busbar is converted by the converter and then input into the battery pack; during the discharging process of the battery pack, the electric energy output by the battery pack is converted by the converter and then input into the busbar.

[0127] In one implementation, this embodiment can also construct a multi-level power conversion architecture during actual use, and the number, position, and connection relationship between the conversion modules or converters in each level of the power conversion architecture and each battery pack are not specifically limited. For example, each level of the power conversion architecture can be set to include one or two conversion modules to meet the needs.

[0128] The following only uses an energy storage device including a single battery pack as an example for explanation, wherein the scenario of an energy storage device including multiple battery packs is the same as that of an energy storage device including a single battery pack, so it will not be described in detail.

[0129] For reference, Figure 8 As shown, the energy storage device or energy storage system includes a two-level power conversion architecture, wherein the first-level power conversion architecture is a DC / DC converter unit 510, and the second-level power conversion architecture is an energy storage converter (i.e., PCS); wherein the energy storage converter 520 is connected to the bus, and a single battery pack is used to be connected to the same bus through a DC / DC converter unit 510 independent of the energy storage converter 520.

[0130] Based on this architecture, during the charging process of the battery pack, the electric energy output from the busbar is converted by the DC / DC converter unit 510 and then input into the battery pack; during the discharging process of the battery pack, the electric energy output from the battery pack is converted by the DC / DC converter unit 510 and then input into the busbar.

[0131] Furthermore, when an external power source supplies power to the battery pack, the external electric energy is converted into electric energy via the energy storage inverter 520 and then input into the busbar, and then converted into electric energy via the DC / DC converter unit 510 and then input into the battery pack, so as to realize charging of the battery pack; and when the battery pack supplies power to an external load, the electric energy of the battery pack is converted into electric energy via the DC / DC converter unit 510 and then input into the busbar, and then converted into electric energy via the energy storage inverter 520 and then output to the external load, so as to realize discharging of the battery pack.

[0132] In this embodiment, after the independent control board 200, the flow plate 300 and the battery cell group 100 are spliced ​​and combined into an independent battery pack, these battery packs can be connected in series or in parallel to form a battery cluster, which can be applied to a variety of large-scale energy storage scenarios to meet different load requirements. Moreover, since each part inside each battery pack is a detachable independent structure, it is convenient to replace one of the parts of the battery pack with a different type based on different application scenario requirements or maintenance requirements in the future without replacing the entire battery pack, thereby improving the flexibility and maintenance convenience of the battery cluster in multi-scenario applications. Moreover, each independent structure in the battery pack can be reused, which can significantly reduce the manufacturing and maintenance costs of the battery pack.

[0133] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0134] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0135] If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk.

[0136] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the 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.

Claims

1. An assembled battery pack, characterized in that: include: Battery cell group; A control board, wherein a first splicing component is provided on the control board so as to be electrically connected to the battery cell group through the first splicing component; A flow plate, on which a second splicing assembly is provided, so as to be electrically connected to the battery cell group through the second splicing assembly; The through-flow plate is also provided with a docking assembly to be electrically connected to the control board through the docking assembly. The through-flow plate is used to control the on-off of the electrical circuit in the assembled battery pack according to the control signal sent by the control board.

2. The assembled battery pack according to claim 1, characterized in that: The types of the through-flow plates include first-type through-flow plates, second-type through-flow plates and third-type through-flow plates; The first type of through-flow plate is applicable to a voltage range between a first voltage and a second voltage, and a current range between a first current and a second current; The second type of through-flow plate is applicable to a voltage range greater than the second voltage and a current range not greater than the first current; The third type of through-flow plate is applicable to a voltage range not greater than the first voltage, and a current range not less than the second current.

3. The assembled battery pack according to claim 1, characterized in that: The output positive electrode and the output negative electrode of the battery pack are connected to the positive terminal and the negative terminal of the battery cell group respectively; The through-flow plate is disposed between the negative terminal of the battery cell group and the output negative electrode of the battery pack through the second splicing component, and the through-flow plate is also connected to the output positive electrode of the battery pack.

4. The assembled battery pack according to claim 1, characterized in that: The control panel further comprises a first shell, the body of the control panel is placed in the first shell, and the first splicing assembly is arranged on the first shell.

5. The assembled battery pack according to claim 4, characterized in that: The first shell is also provided with a first external communication interface, and the control board communicates with an external battery pack or an external device through the first external communication interface.

6. The assembled battery pack according to claim 1, characterized in that: The control board is integrated with a collection unit and a control unit; The collecting unit is used to collect the cell information of the cell group; The control unit is used to generate a control signal based on the battery cell information; The control signal is sent to the through-flow plate, so that the through-flow plate controls the connection state between the battery cell group and the output of the battery pack according to the control signal.

7. The assembled battery pack according to claim 1, characterized in that: The flow plate further includes a second shell, the body of the flow plate is placed in the second shell, and the second splicing assembly is arranged on the second shell.

8. The assembled battery pack according to claim 7, characterized in that: The second shell is also provided with a second external communication interface, and the flow plate communicates with an external battery pack or an external device through the second external communication interface.

9. The assembled battery pack according to claim 1, characterized in that: A switch unit is integrated on the through-flow plate, and the switch unit includes a charging switch and a discharging switch, and the charging switch and the discharging switch are connected in series between the negative terminal of the battery cell group and the output negative electrode of the battery pack; The switch unit is used to receive the control signal sent by the control board, so as to drive the internal charging switch or the discharging switch to close or turn off through the control signal, so as to realize the on-off control of the electrical circuit in the battery pack.

10. The assembled battery pack according to claim 1, characterized in that: The docking assembly includes one of a pluggable interface or a wiring harness terminal.

11. An energy storage device, characterized in that: Comprising at least one assembled battery pack as claimed in any one of claims 1 to 10.

12. The energy storage device according to claim 11, characterized in that: If there are multiple battery packs, the battery packs are connected in series in sequence and then connected to the same busbar; The type of the through-flow plate in each of the battery packs is selected from the first type of through-flow plate and / or the second type of through-flow plate.

13. The energy storage device according to claim 11, characterized in that: If there are multiple battery packs, each battery pack is connected in parallel to the same busbar; The type of the through-flow plate in each of the battery packs is the first type of through-flow plate and / or the third type of through-flow plate.

14. The energy storage device according to any one of claims 11 to 13, characterized in that: The energy storage device further includes a main control box; the main control box and each of the battery packs are connected to the same busbar; The main control box is connected to each of the battery packs and is used to send a target indication signal to the target battery pack, wherein the target indication signal is used to instruct the control board to perform on-off control on the electrical circuit of the target battery pack through the flow plate.

15. The energy storage device according to any one of claims 11 to 13, characterized in that: The energy storage device also includes a current conversion module; Each of the battery packs is connected to the busbar through the converter module; the converter module is used to convert the electric energy output by the battery pack and input it to the busbar, or to convert the electric energy output by the busbar and input it to the battery pack; And / or, each of the battery packs and the converter module are respectively connected to the same busbar; the converter module is used to convert the electric energy input to the busbar by each of the battery packs and then output it.

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