Battery pack stacking position identification device, battery pack, energy storage system and electrical equipment

Abstract

The invention discloses a battery pack stacking position recognition device, a battery pack, an energy storage system and electrical equipment, the device is applied to the energy storage system, the energy storage system at least comprises a first battery pack and a second battery pack, the first battery pack comprises a first recognition device, and the second battery pack comprises a second recognition device with the same structure as the first recognition device. The first identification device comprises a first identification circuit and a second identification circuit, the first identification circuit is connected with a first external interface of the first battery pack, and the second identification circuit is connected with a second external interface of the first battery pack; and the controller is respectively connected with the first external interface and the second external interface, and is used for acquiring the first voltage of the first external interface and the second voltage of the second external interface, and determining the stacking position of the first battery pack according to the first voltage and the second voltage. The device determines the stacking position of the first battery pack based on the first voltage and the second voltage, manual configuration is not needed, and the complexity of installation and debugging is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a battery pack stacking position identification device, a battery pack, an energy storage system and an electrical equipment. Background Art

[0002] Low-voltage household energy storage systems mostly employ a modular design, where battery packs are stacked and connected in parallel to form an integrated system. To facilitate universality, the hardware and software of each battery pack are universally designed. This also makes it impossible to identify the specific location of each battery pack after the energy storage system is assembled. This hinders users from intuitively understanding the energy storage system's status and hinders after-sales service from quickly locating problematic battery packs.

[0003] To solve the above problems, related technologies manually set the ID (Identity Document) corresponding to each battery pack during the installation and commissioning phase of the energy storage system. This technical solution increases the difficulty and time of installation and commissioning, and is not conducive to the rapid installation of the product. Summary of the Invention

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, a first object of the present invention is to provide a battery pack stacking position identification device that determines the stacking position of a first battery pack based on a first voltage at a first external interface of the first battery pack and a second voltage at a second external interface. This eliminates the need for manual configuration and reduces the complexity of installation and commissioning.

[0005] A second objective of the present invention is to provide a battery pack.

[0006] The third object of the present invention is to provide an energy storage system.

[0007] A fourth object of the present invention is to provide an electrical device.

[0008] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes a battery pack stacking position identification device, which is applied to an energy storage system, wherein the energy storage system includes at least a first battery pack and a second battery pack, the first battery pack and the second battery pack are arranged adjacent to each other, the first battery pack includes a first identification device, and the second battery pack includes a second identification device with the same structure as the first identification device, the first identification device includes: a first identification circuit and a second identification circuit, the first identification circuit is connected to the first external interface of the first battery pack, and the second identification circuit is connected to the second external interface of the first battery pack, wherein the first external interface of the first battery pack is suitable for being connected to the second external interface of the second battery pack or the second external interface of the first battery pack is suitable for being connected to the first external interface of the second battery pack; a controller, the controller is respectively connected to the first external interface and the second external interface, and is used to obtain a first voltage of the first external interface and a second voltage of the second external interface, and determine the stacking position of the first battery pack based on the first voltage and the second voltage.

[0009] A battery pack stacking position identification device according to an embodiment of the present invention is applied to an energy storage system, the energy storage system including at least a first battery pack and a second battery pack. The first battery pack and the second battery pack are arranged adjacent to each other, the first battery pack including a first identification device, and the second battery pack including a second identification device having the same structure as the first identification device. In the first identification device, a first identification circuit is connected to a first external interface of the first battery pack, and a second identification circuit is connected to a second external interface of the first battery pack. The first external interface of the first battery pack is adapted to be connected to the second external interface of the second battery pack, or the second external interface of the first battery pack is adapted to be connected to the first external interface of the second battery pack. A controller is connected to the first external interface and the second external interface, respectively. The controller obtains a first voltage of the first external interface and a second voltage of the second external interface, and determines the stacking position of the first battery pack based on the first and second voltages. Thus, the device can determine the stacking position of the first battery pack based on the first voltage of the first external interface and the second voltage of the second external interface of the first battery pack. This allows the device to automatically identify the stacking position of each battery pack after system installation, assuming that the software and hardware of each battery pack are universal, without the need for manual configuration, thus reducing the complexity of installation and commissioning.

[0010] In addition, the battery pack stacking position identification device according to the above embodiment of the present invention may also have the following additional technical features:

[0011] According to one embodiment of the present invention, the controller is used to perform at least one of the following judgments: when the second voltage is the first voltage value and the second voltage is different from the first voltage, determining that the first battery pack is located in the top layer; when the first voltage and the second voltage are both the first voltage value, determining that the first battery pack is located in the middle layer; when the first voltage is the first voltage value and the first voltage is different from the second voltage, determining that the first battery pack is located in the bottom layer.

[0012] According to one embodiment of the present invention, the first identification circuit includes a first resistor, which is connected in series between the first power supply terminal and the first external interface of the first battery pack; the second identification circuit includes a second resistor, which is connected in series between the first ground terminal and the second external interface of the first battery pack.

[0013] According to one embodiment of the present invention, the first external interface of the first battery pack is further suitable for being suspended or connected to a first external circuit, wherein when the first external circuit is connected to the first identification circuit, the first voltage is the second voltage value.

[0014] According to one embodiment of the present invention, the first external circuit includes a third resistor, one end of the third resistor is connected to the second ground terminal, and the other end of the third resistor is suitable for connecting to the first external interface of the first battery pack.

[0015] According to one embodiment of the present invention, the second external interface of the first battery pack is further suitable for being suspended or connected to a second external circuit, wherein when the second external circuit is connected to the second identification circuit, the second voltage is a third voltage value.

[0016] According to one embodiment of the present invention, the second external circuit includes a fourth resistor, one end of the fourth resistor is connected to the second power supply terminal, and the other end of the fourth resistor is suitable for connecting to the second external interface of the first battery pack.

[0017] According to one embodiment of the present invention, the controller is further configured to generate position identification information of the first battery pack according to the stacking position of the first battery pack.

[0018] According to one embodiment of the present invention, the first identification device further includes: a power module, which is connected to the controller and is used to convert at least part of the voltage of the battery modules in the battery pack to generate a power supply voltage to power the controller.

[0019] To achieve the above-mentioned objectives, a second embodiment of the present invention provides a battery pack, comprising the above-mentioned battery pack stacking position identification device.

[0020] According to the battery pack of an embodiment of the present invention, based on the above-mentioned battery pack stacking position identification device, the battery pack can determine its own stacking position based on the first voltage of the first external interface and the second voltage of the second external interface of the battery pack. Therefore, under the premise that the battery pack hardware and software are universal, after the system is installed, the battery pack can automatically identify its own stacking position without manual configuration, thereby reducing the complexity of installation and debugging.

[0021] In addition, the battery pack according to the above embodiment of the present invention may also have the following additional technical features:

[0022] According to one embodiment of the present invention, the battery pack further includes: a battery module; and a voltage conversion module, wherein the voltage conversion module is connected to the battery module and is configured to convert the voltage of the battery module to obtain a target voltage.

[0023] To achieve the above-mentioned purpose, the third embodiment of the present invention proposes an energy storage system, comprising: a plurality of battery packs stacked in sequence, and the number of battery packs is less than or equal to 3, and each battery pack is provided with the above-mentioned battery pack stacking position identification device to determine its own stacking position.

[0024] According to an embodiment of the present invention, the energy storage system includes a plurality of battery packs stacked in sequence, and the number of battery packs is less than or equal to 3. Each battery pack is provided with the above-mentioned battery pack stacking position identification device to determine its own stacking position. Thus, under the premise that the software and hardware of each battery pack are universal, after the energy storage system is installed, the stacking position of each battery pack can be automatically identified without manual configuration, thereby reducing the complexity of installation and commissioning of the energy storage system.

[0025] In addition, the energy storage system according to the above embodiment of the present invention may also have the following additional technical features:

[0026] According to one embodiment of the present invention, the energy storage system further includes an intelligent control module, and each battery pack is further configured to determine its own position identification information based on the stacking position and send the information to the intelligent control module.

[0027] According to one embodiment of the present invention, the first external circuit is provided in the intelligent control module.

[0028] To achieve the above-mentioned objectives, a fourth embodiment of the present invention proposes an electrical device, including the above-mentioned battery pack stacking position identification device, or the above-mentioned battery pack, or the above-mentioned energy storage system.

[0029] According to the electrical equipment of the embodiment of the present invention, based on the above-mentioned battery pack stacking position identification device, or the above-mentioned battery pack, or the above-mentioned energy storage system, the stacking position of the corresponding battery pack can be automatically identified, thereby achieving the premise that the software and hardware of each battery pack are universal, and after the installation is completed, the stacking position of each battery pack can be automatically identified without manual configuration, which reduces the complexity of installation and debugging, shortens the installation time, and facilitates the rapid installation of electrical equipment.

[0030] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the connection of a battery pack stacking position identification device according to one embodiment of the present invention;

[0032] Figure 2 A schematic diagram of the connection of a battery pack stacking position identification device according to another embodiment of the present invention;

[0033] Figure 3 A circuit diagram of an energy storage system including three battery packs according to a specific embodiment of the present invention is shown in FIG. Figure 1 ;

[0034] Figure 4 is a circuit diagram of a first identification device according to a specific embodiment of the present invention;

[0035] Figure 5 A circuit diagram of an energy storage system including two battery packs according to a specific embodiment of the present invention is shown in FIG. Figure 1 ;

[0036] Figure 6 A circuit diagram of an energy storage system including two battery packs according to a specific embodiment of the present invention is shown in FIG. Figure 2 ;

[0037] Figure 7 A circuit diagram of an energy storage system including three battery packs according to a specific embodiment of the present invention is shown in FIG. Figure 2 ;

[0038] Figure 8 A circuit diagram of an energy storage system including two battery packs according to a specific embodiment of the present invention is shown in FIG. Figure 3 ;

[0039] Figure 9 A circuit diagram of an energy storage system including three battery packs according to a specific embodiment of the present invention is shown in FIG. Figure 3 ;

[0040] Figure 10A circuit diagram of an energy storage system including two battery packs according to a specific embodiment of the present invention is shown in FIG. Figure 4 ;

[0041] Figure 11 A circuit diagram of an energy storage system including three battery packs according to a specific embodiment of the present invention is shown in FIG. Figure 4 ;

[0042] Figure 12 is a circuit diagram of a first battery pack according to a specific embodiment of the present invention;

[0043] Figure 13 A circuit diagram of an energy storage system including three battery packs according to a specific embodiment of the present invention is shown in FIG. Figure 5 ;

[0044] Figure 14 is a block diagram of a battery pack according to an embodiment of the present invention;

[0045] Figure 15 is a block diagram of a battery pack according to one embodiment of the present invention;

[0046] Figure 16 is a block diagram of an energy storage system according to an embodiment of the present invention;

[0047] Figure 17 is a block diagram of an energy storage system according to one embodiment of the present invention;

[0048] Figure 18 is a circuit diagram of an energy storage system according to a specific embodiment of the present invention;

[0049] Figure 19 A block diagram of an electrical device according to an embodiment of the present invention Figure 1 ;

[0050] Figure 20 A block diagram of an electrical device according to an embodiment of the present invention Figure 2 ;

[0051] Figure 21 A block diagram of an electrical device according to an embodiment of the present invention Figure 3 . DETAILED DESCRIPTION

[0052] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0053] The following describes a battery pack stacking position identification device, a battery pack, an energy storage system, and an electrical device according to embodiments of the present invention with reference to the accompanying drawings.

[0054] In energy storage systems, battery packs are stacked and connected in parallel to form an integrated system. To facilitate universalization, the hardware and software of each battery pack are universal. As a result, the specific location of each battery pack cannot be identified after the energy storage system is assembled. For example, if three battery packs are stacked together, the upper-level management system can use software to identify the number of battery packs, but it cannot identify which of the three battery packs is at the bottom, middle, or top. This hinders users from gaining a more intuitive understanding of the system's status and hinders after-sales service from quickly locating the problematic battery pack.

[0055] To address this issue, related technologies use DIP switches to manually dial a code during energy storage system installation to assign a different ID to each battery pack. Alternatively, during the energy storage system commissioning phase, different IDs are set for each battery pack via software to ensure that each battery pack has a unique ID. Alternatively, during the battery pack production phase, an address chip is built into each battery pack, and during energy storage system commissioning, the battery pack address is manually determined to correspond to the installation location. All of the above technical solutions require manual operation during the installation and commissioning phase of the energy storage system, increasing the difficulty and time of installation and hindering the rapid installation of the product.

[0056] In order to solve the above technical problems, the present application proposes a battery pack stacking position identification device. In the first identification device, the first identification circuit is connected to the first external interface of the first battery pack, and the second identification circuit is connected to the second external interface of the first battery pack, wherein the first external interface of the first battery pack is suitable for being connected to the second external interface of the second battery pack or the second external interface of the first battery pack is suitable for being connected to the first external interface of the second battery pack. The controller obtains the first voltage of the first external interface and the second voltage of the second external interface, and determines the stacking position of the first battery pack based on the first voltage and the second voltage, thereby achieving automatic identification of the stacking position of the first battery pack after the system installation is completed, without the need for manual configuration, under the premise that the battery pack hardware and software are universal, thereby reducing the complexity of installation and debugging.

[0057] Figure 1 Schematic diagram of the connection of a battery pack stacking position identification device according to one embodiment of the present invention.

[0058] like Figure 1As shown, the battery pack stacking position identification device according to an embodiment of the present invention is applied to an energy storage system 1000. The energy storage system 1000 includes at least a first battery pack 100 and a second battery pack 200. The first battery pack 100 and the second battery pack 200 are arranged adjacent to each other. The first battery pack 100 includes a first identification device 110, and the second battery pack 200 includes a second identification device 210 with the same structure as the first identification device 110. The first identification device 110 may include: a first identification circuit 10, a second identification circuit 20 and a controller 30.

[0059] The first identification circuit 10 is connected to the first external interface 120 of the first battery pack, and the second identification circuit 20 is connected to the second external interface 130 of the first battery pack. The first external interface 120 of the first battery pack is adapted to be connected to the second external interface 230 of the second battery pack, or the second external interface 120 of the first battery pack is adapted to be connected to the first external interface 220 of the second battery pack. A controller 30 is connected to the first external interface 120 and the second external interface 130, respectively. The controller 30 is configured to obtain a first voltage at the first external interface 120 and a second voltage at the second external interface 130, and to determine the stacking position of the first battery pack 100 based on the first and second voltages.

[0060] Specifically, the first external interface 120 of the first battery pack and the second external interface 130 of the first battery pack can be adaptively connected according to their stacking positions and system requirements. Taking the energy storage system 1000 consisting of a first battery pack 100 and a second battery pack 200 as an example, when the first battery pack 100 is located on the upper layer of the second battery pack 200, Figure 1 As shown, the second external interface 130 of the first battery pack is connected to the first external interface 220 of the second battery pack, and the first external interface 120 of the first battery pack can be suspended or connected to an external circuit; when the first battery pack 100 is located at the lower layer of the second battery pack 200, as shown Figure 2 As shown, the first external interface 120 of the first battery pack is connected to the second external interface 230 of the second battery pack, and the second external interface 130 of the first battery pack can be suspended or connected to an external circuit.

[0061] Since the connection circuits of the first external interface 120 and the second external interface 130 of the first battery pack at different stacking positions are different, the first voltage of the first external interface 120 and the second voltage of the second external interface 130 of the first battery pack at different stacking positions are also different. Figure 1In the embodiment shown, when the first external interface 120 is left floating, the first voltage of the first external interface 120 of the first battery pack is only related to the first identification circuit 10, and the second voltage of the second external interface 130 of the first battery pack is related to the second identification circuit 20 and the voltage at the first external interface 220 of the second battery pack, that is, the first identification circuit 10 in the second identification circuit 20; Figure 2 In the illustrated embodiment, when the second external interface 130 is left floating, the second voltage of the second external interface 130 of the first battery pack is only related to the second identification circuit 20 in the first battery pack 100. However, the first voltage of the first external interface 120 of the first battery pack is not only related to the first identification circuit 10 in the first battery pack 100, but is also affected by the voltage at the second external interface 230 of the second battery pack, that is, the second identification circuit 20 in the second battery pack 200.

[0062] The controller 30 obtains the first voltage of the first external interface 120 through the first identification circuit 10, obtains the second voltage of the second external interface 130 through the second identification circuit 20, and determines the stacking position of the first battery pack 100 based on the voltage values ​​of the first voltage and the second voltage, thereby eliminating the manual configuration process and reducing the complexity of installation and debugging of the stacked energy storage system.

[0063] Furthermore, the second identification device 210 has the same structure as the first identification device 110, including similarities in hardware and functionality. For example, from a hardware circuit perspective, the second identification device 210 includes the same circuit structure as the first identification device 110 to achieve the same function as the first identification device 110. That is, the second identification device 210 can determine the stacking position of the second battery pack 200 based on the voltage values ​​of the first voltage and the second voltage of the second battery pack 200. Thus, the two devices work together to confirm the stacking position of the battery packs within the energy storage system, eliminating the manual configuration process and reducing the complexity of system installation and commissioning. In one embodiment of the present invention, the controller 30 is configured to perform at least one of the following judgments: when the second voltage is the first voltage value V1 and the second voltage is different from the first voltage, determining that the first battery pack 100 is located in the top layer; when the first voltage and the second voltage are both the first voltage value V1, determining that the first battery pack 100 is located in the middle layer; when the first voltage is the first voltage value V1 and the first voltage is different from the second voltage, determining that the first battery pack 100 is located in the bottom layer.

[0064] Specifically, Figure 3For example, energy storage system 1000 is composed of three battery packs: battery pack A, battery pack B, and battery pack C, from top to bottom. Battery pack A has a first external interface A1 and a second external interface A2, battery pack B has a first external interface B1 and a second external interface B2, and battery pack C has a first external interface C1 and a second external interface C2. First external interface A1 is suspended, second external interface A2 is connected to first external interface B1, second external interface B2 is connected to first external interface C1, and second external interface C2 is suspended.

[0065] In battery pack A, the first voltage of the first external interface A1 is determined only by the first identification circuit 10, and the second voltage of the second external interface A2 is determined by the second identification circuit 20 in battery pack A and the first identification circuit 10 in battery pack B; in battery pack B, the first voltage of the first external interface B1 corresponds to the voltage of the second external interface A2 of battery pack A, and both are determined by the second identification circuit 20 in battery pack A and the first identification circuit 10 in battery pack B, and the second voltage of the second external interface B2 is determined by the second identification circuit 20 in battery pack B and the first identification circuit 10 in battery pack C; in battery pack C, the first voltage of the first external interface C1 is equal to the voltage of the second external interface B1 of battery pack B, and both are determined by the second identification circuit 20 in battery pack B and the first identification circuit 10 in battery pack C, and the second voltage of the second external interface C2 is determined by the second identification circuit 10.

[0066] Since the identification devices in each battery pack are the same, the second voltage of battery pack A, the first voltage of battery pack B, the second voltage of battery pack B, and the second voltage of battery pack C are all equal, which are the first voltage value V1. Due to different circuit connections, the first voltage of battery pack A and the second voltage of battery pack C are not the first voltage value V1.

[0067] Therefore, when the first voltage and the second voltage values ​​obtained by the controller 30 are both the first voltage value V1, the controller can determine that the first battery pack 100 is located in the middle layer. When the voltage values ​​of the first voltage and the second voltage obtained are different, if the second voltage is the first voltage value V1, the controller 30 determines that the first battery pack 100 is located in the top layer. If the first voltage is the first voltage value V1, the controller can determine that the first battery pack 100 is in the bottom layer.

[0068] In addition, when the energy storage system 1000 is composed of two battery packs, Figure 1 、 Figure 2 As shown, the controller 30 may determine that the first battery pack 100 is at the bottom layer when the first voltage of the first battery pack 100 is the first voltage value V1, and determine that the first battery pack 100 is at the top layer when the second voltage of the first battery pack 100 is the first voltage value V1.

[0069] The first external interface 120 and the second external interface 130 of the first battery pack can be connected according to actual conditions, such as being suspended, connected to an external circuit, or connected to the external interface of an adjacent battery pack. The voltage values ​​of the first voltage and the second voltage obtained in different situations are also different. Figure 3-11 The battery pack stacking position recognition device of the present application is described in detail.

[0070] In one embodiment of the present invention, Figure 4 As shown, the first identification circuit 10 includes a first resistor R1, which is connected in series between the first power supply terminal VCC1 and the first external interface 120 of the first battery pack; the second identification circuit 20 includes a second resistor R2, which is connected in series between the first ground terminal GND1 and the second external interface 130 of the first battery pack.

[0071] Specifically, the first power terminal VCC1 can be obtained by converting the power of the battery module in the first battery pack 100. The specific voltage value can be determined according to actual conditions. For example, the first power terminal VCC1 is 5V.

[0072] The port AD1 of the controller 30 is connected between the first external interface 120 and the first resistor R1. When the first external interface 120 is connected to the second external interface 230 of the second battery pack, the voltage value of the first voltage obtained by AD1 is the first voltage value V1=VCC1*R2 / (R1+R2), for example Figure 5 Battery pack B in the .

[0073] The port AD2 of the controller 30 is connected between the second external interface 130 and the second resistor R2. When the second external interface 130 is connected to the first external interface 220 of the second battery pack, the voltage value of the second voltage obtained by AD2 is the first voltage value V1=VCC1*R2 / (R1+R2), for example Figure 5 Battery pack A shown.

[0074] In one embodiment of the present invention, the first external interface 120 of the first battery pack is further suitable for being suspended or connected to the first external circuit 40, wherein when the first external circuit 40 is connected to the first identification circuit 10, the first voltage is the second voltage value V2.

[0075] Specifically, when the first external interface 120 of the first battery pack is suspended, the voltage value of the first voltage obtained by AD1 of the controller 30 is VCC1. Figure 5 The controller 30 determines that the first voltage and the second voltage of the first battery pack 100 are different. If the first voltage is VCC1 and the second voltage is the first voltage value V1, the controller 30 determines that the first battery pack 100 is at the top.

[0076] When the first external interface 120 of the first battery pack is connected to the first external circuit 40, the voltage value of the first voltage obtained by AD1 of the controller 30 is affected by the first identification circuit 10 and the first external circuit 40 and is the second voltage value V2, such as Figure 6 The battery pack A is shown. At this time, when it is determined that the first voltage and the second voltage of the first battery pack 100 are different, if the first voltage is determined to be the second voltage value V2 and the second voltage is the first voltage value V1, the first battery pack 100 is determined to be at the uppermost layer.

[0077] It should be noted that in the energy storage system composed of three battery packs, Figure 7 As shown, the second voltage value V2 is not equal to the first voltage value V1, so as to distinguish the uppermost layer from the middle layer. However, in the energy storage system composed of two battery packs, Figure 6 As shown, the first voltage of the battery pack A located at the top layer is the second voltage value V2, and the second voltage is the first voltage value V1. The first voltage of the battery pack B located at the bottom layer is the first voltage value V1, and the second voltage is 0. Therefore, in this embodiment, even if the first voltage value V1 and the second voltage value V2 are designed to be equal, the layers of the battery packs can be distinguished, so there is no restriction.

[0078] In one embodiment of the present invention, the first external circuit 40 includes a third resistor R3 , one end of the third resistor R3 is connected to the second ground terminal GND2 , and the other end of the third resistor R3 is suitable for connecting to the first external interface 120 of the first battery pack.

[0079] That is, when the first external interface 120 of the first battery pack is connected to the first external circuit 40, the first voltage detected by the AD1 port of the controller 30 is VCC1*R3 / (R1+R3), which is the second voltage V2. In practice, the resistance of the third resistor is different from the resistance of the first resistor to distinguish the first voltage V1 from the second voltage V2.

[0080] In one embodiment of the present invention, the second external interface 130 of the first battery pack is further suitable for being suspended or connected to the second external circuit 50, wherein when the second external circuit 50 is connected to the second identification circuit 20, the second voltage is a third voltage value V3.

[0081] Specifically, when the second external interface 130 of the first battery pack is left unconnected, the voltage value of the second voltage acquired by AD2 of the controller 30 is 0. At this time, when the controller 30 determines that the first voltage and the second voltage of the first battery pack 100 are different, if the second voltage is determined to be the first voltage value V1 and the second voltage is 0, it is determined that the first battery pack 100 is at the bottom layer. Figure 3 、 Figure 7The battery pack C shown, Figure 5 、 Figure 6 Battery pack B shown.

[0082] When the second external interface 130 of the first battery pack is connected to the second external circuit 50, the voltage value of the second voltage obtained by AD2 of the controller 30 is affected by the second identification circuit 20 and the second external circuit 50, and is the third voltage value V3. At this time, when the controller 30 determines that the first voltage and the second voltage of the first battery pack 100 are different, if the first voltage is determined to be the first voltage value V1 and the second voltage is the third voltage value V3, it is determined that the first battery pack 100 is at the bottom layer, such as Figure 8 The battery pack B shown Figure 9 Battery pack C shown.

[0083] It should be noted that in the energy storage system composed of three battery packs, Figure 9 As shown, the third voltage value V3 is not equal to the first voltage value V1, so as to distinguish the bottom layer from the middle layer. However, in the energy storage system composed of two battery packs, Figure 8 As shown, the first voltage of the battery pack A at the top layer is VCC1, and the second voltage is the first voltage value V1. The first voltage of the battery pack B at the bottom layer is the first voltage value V1, and the second voltage is the third voltage value V3. Since the first voltage value V1 is the voltage divider value of VCC1, the first voltage value V1 is not equal to VCC1. Therefore, in this embodiment, even if the first voltage value V1 and the third voltage value V3 are designed to be equal, the levels of the battery packs can be distinguished, so there is no restriction.

[0084] In one embodiment of the present invention, the second external circuit 50 includes a fourth resistor R4 , one end of which is connected to the second power supply terminal VCC2 , and the other end of which is suitable for connecting to the second external interface 130 of the first battery pack.

[0085] That is, when the second external interface 120 of the first battery pack 100 is connected to the second external circuit 50 , the second voltage value recognized by the AD2 port of the controller 30 is VCC2*R2 / (R4+R2), ie, the third voltage value V3.

[0086] In actual application, the first voltage value V1 and the third voltage value V3 can be distinguished by designing VCC1 and VCC2 to different voltage values, or by selecting different resistance values ​​for the first resistor R1 and the fourth resistor R4 to distinguish the first voltage value V1 and the third voltage value V3. There is no specific limitation.

[0087] As a specific embodiment of this application, Figure 3As shown, the first external interface A1 of the battery pack A located at the uppermost layer is suspended, and the second external interface C2 of the battery pack C located at the lowermost layer is suspended.

[0088] In battery pack A, the first voltage obtained by AD1 of controller 30 is the voltage provided by the first power supply terminal VCC1, and the voltage value of the second voltage obtained by AD2 is VCC1*R2 / (R1+R2), that is, the first voltage value V1; in battery pack B, the first voltage obtained by AD1 of controller 30 and the second voltage obtained by AD2 are both VCC1*R2 / (R1+R2), that is, the first voltage value V1; in battery pack C, the first voltage obtained by AD1 of controller 30 is VCC1*R2 / (R1+R2), that is, the first voltage value V1, and the voltage value of the second voltage obtained by AD2 is 0.

[0089] Therefore, in Figure 3 In the energy storage system 1000 shown, the controller 30 in the first battery pack can determine that the first battery pack 100 is in the top layer when the acquired first voltage is VCC1 and the second voltage is the first voltage value V1; when the acquired first voltage and the second voltage are both the first voltage value V1, it is determined that the first battery pack 100 is in the middle layer; and when the acquired first voltage is the first voltage value V1 and the second voltage is 0, it is determined that the first battery pack 100 is in the bottom layer.

[0090] As another specific embodiment of the present application, Figure 7 As shown, the first external interface A1 of the battery pack A located at the top layer is connected to the first external circuit 40 , and the second external interface C2 of the battery pack C located at the bottom layer is suspended.

[0091] In battery pack A, the first voltage obtained by AD1 of controller 30 is VCC1*R3 / (R1+R3), that is, the second voltage value V2, and the second voltage obtained by AD2 is VCC1*R2 / (R1+R2), that is, the first voltage value V1; in battery pack B, the first voltage obtained by AD1 of controller 30 and the second voltage obtained by AD2 are both VCC1*R2 / (R1+R2), that is, the first voltage value V1; in battery pack C, the first voltage obtained by AD1 of controller 30 is VCC1*R2 / (R1+R2), that is, the first voltage value V1, and the second voltage obtained by AD2 is 0.

[0092] Therefore, in Figure 7In the energy storage system 1000 shown, when the first voltage obtained is the second voltage value V2 and the second voltage is the first voltage value V1, the controller 30 can determine that the first battery pack 100 is in the top layer; when the first voltage and the second voltage obtained are both the first voltage value V1, the controller 30 can determine that the first battery pack 100 is in the middle layer; when the first voltage obtained is the first voltage value V1 and the second voltage is 0, the controller 30 can determine that the first battery pack 100 is in the bottom layer.

[0093] As another specific embodiment of the present application, Figure 9 As shown, the first external interface A1 of the battery pack A located at the top is suspended, and the second external interface C2 of the battery pack C located at the bottom is connected to the second external circuit 50 .

[0094] In battery pack A, the first voltage obtained by AD1 of controller 30 is VCC1, and the voltage value of the second voltage obtained by AD2 is VCC1*R2 / (R1+R2), that is, the first voltage value V1; in battery pack B, the voltage values ​​of the first voltage obtained by AD1 of controller 30 and the second voltage obtained by AD2 are both VCC1*R2 / (R1+R2), that is, the first voltage value V1; in battery pack C, the first voltage obtained by AD1 of controller 30 is VCC1*R2 / (R1+R2), that is, the first voltage value V1, and the voltage value of the second voltage obtained by AD2 is VCC2*R2 / (R4+R2), that is, the third voltage value V3.

[0095] Therefore, in Figure 9 In the energy storage system 1000 shown, when the first voltage obtained is VCC1 and the second voltage is the first voltage value V1, the controller 30 can determine that the first battery pack 100 is in the top layer; when the first voltage and the second voltage obtained are both the first voltage value V1, the controller 30 can determine that the first battery pack 100 is in the middle layer; when the first voltage obtained is the first voltage value V1 and the second voltage obtained is the third voltage value V3, the controller 30 can determine that the first battery pack 100 is in the bottom layer.

[0096] In addition, as another specific embodiment of the present application, Figure 11 As shown, the first external interface 120 of the battery pack A is connected to the first external circuit 40 , and the second external interface of the bottom battery pack C is connected to the second external circuit 50 .

[0097] In battery pack A, the first voltage obtained by AD1 of controller 30 is VCC1*R3 / (R1+R3), that is, the second voltage value V2, and the voltage value of the second voltage obtained by AD2 is VCC1*R2 / (R1+R2), that is, the first voltage value V1; in battery pack B, the first voltage obtained by AD1 of controller 30 and the second voltage obtained by AD2 are both VCC1*R2 / (R1+R2), that is, the first voltage value V1; in battery pack C, the first voltage obtained by AD1 of controller 30 is VCC1*R2 / (R1+R2), that is, the first voltage value V1, and the voltage value of the second voltage obtained by AD2 is VCC2*R2 / (R4+R2), that is, the third voltage value V3.

[0098] Therefore, in Figure 11 In the energy storage system 1000 shown, when the first voltage obtained is the second voltage value V2 and the second voltage is the first voltage value V1, the controller 30 can determine that the first battery pack 100 is in the top layer; when the first voltage and the second voltage obtained are both the first voltage value V1, the controller 30 can determine that the first battery pack 100 is in the middle layer; when the first voltage obtained is the first voltage value V1 and the second voltage obtained is the third voltage value V3, the controller 30 can determine that the first battery pack 100 is in the bottom layer.

[0099] In one embodiment of the present invention, the controller 30 is further configured to generate position identification information of the first battery pack 100 according to the stacking position of the first battery pack 100 .

[0100] by Figure 3 Taking the energy storage system 1000 shown as an example, specifically,

[0101] When the detected first voltage value is VCC1 and the detected second voltage value is VCC1*R2 / (R1+R2), the controller 30 determines that the battery pack in which it is located is at the top layer and sets the ID of the battery pack to 1;

[0102] When the detected first voltage and the detected second voltage are equal, namely, VCC1*R2 / (R1+R2), the controller 30 determines that the battery pack is in the middle layer and sets the ID of the battery pack to 2.

[0103] When the detected first voltage value is VCC1*R2 / (R1+R2) and the second voltage value is 0, the controller 30 determines that it is located at the bottom layer and sets the ID of the battery pack to 3.

[0104] Furthermore, the controller 30 can transmit information to the intelligent control module or host computer via CAN (Controller Area Network) communication, thereby completing the identification of the battery pack's ID and location. For example, when the energy storage system 1000 is used in a vehicle, the controller 30 can upload the battery pack's ID to the vehicle controller; when the energy storage system 1000 is used in a photovoltaic energy storage system, the controller 30 can upload the battery pack's ID to the system's master controller, providing a visual understanding of the energy storage system's status and helping after-sales service personnel more quickly locate problematic battery packs.

[0105] In one embodiment of the present invention, Figure 12 As shown, the first identification device 110 further includes: a power module 60 , which is connected to the controller 30 and is used to convert at least part of the voltage of the battery module 70 in the first battery pack 100 to generate a power supply voltage to power the controller 30 .

[0106] Specifically, the battery module 70 is constructed by connecting multiple cells in parallel or series to meet the power requirements of different applications. The voltage conversion module 80 within the first battery pack 100 converts and outputs the voltage. Simultaneously, some or all of the voltage from the battery module 70 is provided to the power module 60, which converts the voltage of the battery module 70 to generate a supply voltage for the controller 30, thereby powering up the controller 30. The first and second voltages are then detected via AD1 and AD2 to determine the stacking position of the first battery pack 100. Furthermore, the first power supply terminal VCC1 can also be provided by the power module 60.

[0107] Furthermore, the controller 30 may be an MCU (Microcontroller Unit) of a BMS (Battery Management System) of the first battery pack 100 , or may be independent, and there is no specific limitation.

[0108] As a specific embodiment of this application, Figure 13 As shown, energy storage system 1000 consists of three stacked battery packs connected in parallel, each equipped with an identification device. In each battery pack, power module 60 draws power from the battery module 70 within the pack and converts a portion of the voltage of the battery module 70 to generate a supply voltage for controller 30. Controller 30 powers up and detects the first and second voltages of the battery pack using AD1 and AD2.

[0109] When the detected voltage value of the first voltage is VCC1 and the voltage value of the second voltage is VCC1*R2 / (R1+R2), the controller 30 determines that the battery pack in which it is located is located in the top layer, sets the ID of the battery pack to 1, and sends it to the first controller through the CAN bus; when the detected voltage value of the first voltage is equal to the voltage value of the second voltage, both being VCC1*R2 / (R1+R2), the controller 30 determines that the battery pack in which it is located is located in the middle layer, sets the ID of the battery pack to 2, and sends it to the first controller through the CAN bus; when the detected voltage value of the first voltage is VCC1*R2 / (R1+R2) and the voltage value of the second voltage is 0, the controller 30 determines that the battery pack in which it is located is located in the bottom layer, sets the ID of the battery pack to 3, and sends it to the first controller through the CAN bus, thereby automatically completing the ID identification and position identification of the internal battery pack after the energy storage system 1000 is installed.

[0110] In summary, a battery pack stacking position identification device according to an embodiment of the present invention is applied to an energy storage system, wherein the energy storage system includes at least a first battery pack and a second battery pack. The first battery pack and the second battery pack are arranged adjacent to each other, the first battery pack includes a first identification device, and the second battery pack includes a second identification device with the same structure as the first identification device. In the first identification device, a first identification circuit is connected to the first external interface of the first battery pack, and a second identification circuit is connected to the second external interface of the first battery pack. The first external interface of the first battery pack is suitable for connecting to the second external interface of the second battery pack, or the second external interface of the first battery pack is suitable for connecting to the first external interface of the second battery pack. A controller is connected to the first external interface and the second external interface, respectively. The controller obtains a first voltage of the first external interface and a second voltage of the second external interface, and determines the stacking position of the first battery pack based on the first voltage and the second voltage. Thus, the device can determine the stacking position of the first battery pack based on the first voltage of the first external interface and the second voltage of the second external interface of the first battery pack. This allows the stacking position of each battery pack to be automatically identified after the energy storage system is installed, provided that the hardware and software of each battery pack are universal, without the need for manual configuration, thereby reducing the complexity of installation and debugging.

[0111] Corresponding to the above embodiment, the present invention also proposes a battery pack.

[0112] like Figure 14 As shown, the battery pack 300 of the embodiment of the present invention includes the above-mentioned battery pack stacking position identification device 310, so as to detect and identify the stacking position of the battery pack 300 through the battery pack stacking position identification device 310.

[0113] like Figure 15As shown, in one embodiment of the present invention, the battery pack 300 further includes: a battery module 70; a voltage conversion module 80, the voltage conversion module 80 is connected to the battery module 70, and is used to convert the voltage of the battery module 70 to obtain a target voltage.

[0114] Specifically, the battery module 70 can be composed of multiple cells connected in series or in parallel to provide the target power. The voltage conversion module 80 can be a DCDC (Direct Current-Direct Current, DC-DC) conversion module or a DCAC (Direct Current-Alternating Current, DC-AC) conversion module, which is not limited here. It is used to convert and output the voltage of the battery module 70. For details, please refer to Figure 12 shown.

[0115] The battery pack according to an embodiment of the present invention, based on the above-mentioned battery pack stacking position identification device, can determine its own stacking position based on the first voltage of the first external interface and the second voltage of the second external interface of the battery pack, thereby achieving the premise that the software and hardware of each battery pack are universal, after the system installation is completed, it can automatically identify its own stacking position without manual configuration, thereby reducing the complexity of installation and debugging.

[0116] Corresponding to the above embodiment, the present invention also proposes an energy storage system.

[0117] like Figure 16 As shown, an energy storage system 1000 according to an embodiment of the present invention includes: a plurality of battery packs 300 stacked in sequence, with the number of battery packs 300 being less than or equal to three. Each battery pack 300 is provided with the aforementioned battery pack stacking position identification device 310 to determine its stacking position. For example, the energy storage system 1000 may include two battery packs 300 stacked in sequence, connected in parallel; or the energy storage system 1000 may include three battery packs 300 stacked in sequence, connected in parallel, without limitation.

[0118] When the energy storage system 1000 is powered on, the battery pack stacking position identification device 310 in each battery pack 300 can automatically identify the stacking position of the battery pack 300, eliminating the manual debugging process, reducing the difficulty of installation and debugging of the energy storage system, and facilitating rapid installation of the system.

[0119] like Figure 17 As shown, in one embodiment of the present invention, the energy storage system 1000 further includes an intelligent control module 400 , and each battery pack 300 is further configured to determine its own position identification information based on the stacking position and send the information to the intelligent control module 400 .

[0120] Specifically, Figure 18 For example, in the energy storage system 1000, the battery pack 300 and the intelligent control module 400 are installed in an upper and lower stacking manner, with the intelligent control module 400 at the top. The main controller 410 of the intelligent control module 400 is connected to the controller 30 in each battery pack 300 through CAN communication to receive a position identification signal determined by each controller 30 according to the stacking position of the battery pack 300.

[0121] In one embodiment of the present invention, the first external circuit 40 is provided in the intelligent control module 400 .

[0122] According to an embodiment of the present invention, the energy storage system includes a plurality of battery packs stacked in sequence, and the number of battery packs is less than or equal to 3. Each battery pack is provided with the above-mentioned battery pack stacking position identification device to determine its own stacking position. Thus, under the premise that the software and hardware of each battery pack are universal, after the system is installed, the stacking position of each battery pack can be automatically identified without manual configuration, thereby reducing the complexity of installation and commissioning of the energy storage system.

[0123] Corresponding to the above embodiment, the present invention further proposes an electrical device.

[0124] like Figure 19 As shown, the electrical device 2000 of the embodiment of the present invention includes the above-mentioned battery pack stacking position identification device 310, or as shown in FIG. Figure 20 As shown, the electrical device 2000 includes the above-mentioned battery pack 300, or as shown in FIG. Figure 21 As shown, the electrical device 2000 includes the above-mentioned energy storage system 1000. The electrical device refers to a device that needs to use multiple battery packs to build its power supply unit, such as an electric vehicle, a wireless communication device, etc.

[0125] Specifically, in one embodiment of the present invention, the electrical device 2000 includes the above-mentioned battery pack stacking position identification device 310, so as to identify the stacking position of the battery pack in the electrical device through the battery pack stacking position identification device 310. In another embodiment of the present invention, the electrical device 2000 includes the above-mentioned battery pack 300, and a plurality of battery packs 300 are stacked to form the power supply and energy storage unit of the electrical device 2000, wherein the battery pack 300 can identify its own stacking position based on the battery pack stacking position identification device 310. In another embodiment of the present invention, the electrical device 2000 includes the above-mentioned energy storage system 1000, and the energy storage system 1000 serves as the power supply and energy storage unit of the electrical device 2000.

[0126] According to the electrical equipment of the embodiment of the present invention, based on the above-mentioned battery pack stacking position identification device, or the above-mentioned battery pack, or the above-mentioned energy storage system, the stacking position of the corresponding battery pack can be automatically identified, thereby achieving the premise that the software and hardware of each battery pack are universal, and after the equipment is installed, the stacking position of each battery pack can be automatically identified without manual configuration, which reduces the complexity of installation and debugging, shortens the installation time, and facilitates the rapid installation of electrical equipment.

[0127] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0128] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0129] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0130] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery pack stacking position identification device, characterized in that: Applied to an energy storage system, the energy storage system includes at least a first battery pack and a second battery pack, the first battery pack and the second battery pack are arranged adjacent to each other, the first battery includes a first identification device, the second battery includes a second identification device with the same structure as the first identification device, and the first identification device includes: a first identification circuit and a second identification circuit, wherein the first identification circuit is connected to the first external interface of the first battery pack, and the second identification circuit is connected to the second external interface of the first battery pack, wherein the first external interface of the first battery pack is suitable for connecting to the second external interface of the second battery pack, or the second external interface of the first battery pack is suitable for connecting to the first external interface of the second battery pack; A controller is connected to the first external interface and the second external interface respectively, and is used to obtain a first voltage of the first external interface and a second voltage of the second external interface, and determine the stacking position of the first battery pack according to the first voltage and the second voltage.

2. The device according to claim 1, characterized in that The controller is configured to perform at least one of the following determinations: When the second voltage is the first voltage value and the second voltage is different from the first voltage, determining that the first battery pack is located at the uppermost layer; When the first voltage and the second voltage are both the first voltage value, determining that the first battery pack is located in the middle layer; When the first voltage is the first voltage value and the first voltage is different from the second voltage, it is determined that the first battery pack is located at the bottom layer.

3. The device according to claim 2, characterized in that The first identification circuit includes a first resistor, which is connected in series between the first power supply terminal and the first external interface of the first battery pack; the second identification circuit includes a second resistor, which is connected in series between the first ground terminal and the second external interface of the first battery pack.

4. The device according to claim 3, characterized in that The first external interface of the first battery pack is further suitable for being suspended or connected to a first external circuit, wherein when the first external circuit is connected to the first identification circuit, the first voltage is a second voltage value.

5. The device according to claim 4, characterized in that The first external circuit includes a third resistor, one end of the third resistor is connected to the second ground terminal, and the other end of the third resistor is suitable for connecting to the first external interface of the first battery pack.

6. The device according to any one of claims 3 to 5, characterized in that: The second external interface of the first battery pack is further suitable for being suspended or connected to a second external circuit, wherein when the second external circuit is connected to the second identification circuit, the second voltage is a third voltage value.

7. The device according to claim 6, characterized in that The second external circuit includes a fourth resistor, one end of the fourth resistor is connected to the second power supply terminal, and the other end of the fourth resistor is suitable for connecting to the second external interface of the first battery pack.

8. The device according to any one of claims 1 to 5, characterized in that The controller is further configured to generate position identification information of the first battery pack according to the stacking position of the first battery pack.

9. The device according to any one of claims 1 to 5, characterized in that The first identification device further includes: a power supply module, which is connected to the controller and is used to convert at least part of the voltage of the battery modules in the first battery pack to generate a power supply voltage to power the controller.

10. A battery pack, characterized in that: It includes a battery pack stacking position identification device according to any one of claims 1-9.

11. The battery pack according to claim 10, wherein: The battery pack further includes: Battery modules; A voltage conversion module is connected to the battery module and is used to convert the voltage of the battery module to obtain a target voltage.

12. An energy storage system, characterized in that: include: A plurality of battery packs are stacked in sequence, and the number of the battery packs is less than or equal to 3, and each of the battery packs is provided with a battery pack stacking position identification device according to any one of claims 1 to 9 to determine its own stacking position.

13. The system according to claim 12, wherein: The system further includes an intelligent control module, and each of the battery packs is further configured to determine its own position identification information based on the stacking position and send the information to the intelligent control module.

14. The system according to claim 13, wherein: The first external circuit is arranged in the intelligent control module.

15. An electrical device, characterized in that: It includes the battery pack stacking position identification device according to any one of claims 1 to 9, or the battery pack according to claim 10 or 11, or the energy storage system according to any one of claims 12 to 14.

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