Battery connection module and energy storage system

Abstract

To provide a storage battery connection module, a wire harness, and a power storage system, which can prevent an increase in the number of assembly steps of connecting a plurality of storage batteries in series and complicated work.SOLUTION: Provided is a storage battery connection module 100 in which a plurality of storage battery modules M1-M10 are connected in series. The storage battery connection module includes: a base plate 101; a plurality of connection terminals provided on the base plate 101; a plurality of wire harnesses WH1 each connecting the connection terminal to a positive electrode terminal P and a negative electrode terminal N of each of the storage battery modules M1-M10; and a plurality of bus bars 102, 103, 104, 105, 106 provided on the base plate 101 and connecting the plurality of the connection terminals in series.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a battery connection module. , and and energy storage systems. [Background technology]

[0002] Known energy storage systems in which multiple storage batteries are connected in series include a switch that connects or disconnects the storage batteries, a switch that connects or disconnects a bypass line that bypasses the storage batteries, and a control device that detects the state of the storage batteries and controls both switches depending on the detected state (see, for example, Patent Documents 1 to 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-31247 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-31249 [Patent Document 3] Japanese Patent Publication No. 2020-171164 Summary of the Invention [Problem to be solved by the invention]

[0004] When the above-mentioned power storage system is configured by connecting a large number of storage batteries in series, a large number of power lines and signal lines and a large number of wiring and connection operations are required. Therefore, as the number of connected storage batteries increases, the number of steps in the assembly process of the power storage system increases, and the operations become more complicated.

[0005] In view of the above circumstances, the present invention provides a battery connection module that can suppress an increase in the number of steps and the complexity of the assembly process for connecting a plurality of storage batteries in series. , and The purpose is to provide a power storage system. [Means for solving the problem]

[0006] The battery connection module of the present invention comprises: linearly aligned A battery connection module that connects multiple batteries in series and is composed of multiple integrated insulating plates or one long insulating plate. extending along the row of batteries a base plate; Linearly spaced along the row of batteries a plurality of first connection terminals, each of which a wire harness including a positive electrode side wiring that connects a positive electrode terminal of the storage battery and a positive electrode side of the first connection terminal, and a negative electrode side wiring that connects a negative electrode terminal of the storage battery and a negative electrode side of the first connection terminal, One of the first connection terminals and one of the storage batteries The aforementioned Positive terminal and The aforementioned a plurality of first power lines that connect the negative terminal and the first connection terminal; via a plurality of the first power lines and a plurality of the storage batteries A second power line connected in series a plurality of bypass lines each provided on the base plate for each of the storage batteries and connected to the second power line so as to bypass the first connection terminal; a plurality of first switches each provided on the bypass line for each of the storage batteries and configured to interrupt or connect the bypass line; a plurality of second switches each provided on the second power line for each of the storage batteries and configured to interrupt or connect the second power line; a plurality of second connection terminals each connected to the first switches; a plurality of third connection terminals each connected to the second switches; a plurality of first signal lines each connecting a control device to the second connection terminals and transmitting control signals for controlling the first switches from the control device to the first switches; and a plurality of second signal lines each connecting the control device to the third connection terminals and transmitting control signals for controlling the second switches from the control device to the second switches. Equipped with.

[0008] The power storage system of the present invention comprises: linearly aligned A power storage system including a plurality of storage batteries and a storage battery connection module that connects the plurality of storage batteries in series, wherein the storage battery connection module is configured by a plurality of integrated insulating plates or one long insulating plate. extending along the row of batteries a base plate; Linearly spaced along the row of batteries Multiple No. 1 connection terminals, a wire harness including a positive electrode side wiring that connects a positive electrode terminal of the storage battery and a positive electrode side of the first connection terminal, and a negative electrode side wiring that connects a negative electrode terminal of the storage battery and a negative electrode side of the first connection terminal, One of the above No. 1 Connection terminals and one of the storage batteries The aforementioned Positive terminal and The aforementioned a plurality of first power lines connected to the negative terminal; No. 1 Connect the connection terminal via a plurality of the first power lines and a plurality of the storage batteries A second power line connected in series a plurality of bypass lines each provided on the base plate for each of the storage batteries and connected to the second power line so as to bypass the first connection terminal; a plurality of first switches each provided on the bypass line for each of the storage batteries and configured to interrupt or connect the bypass line; a plurality of second switches each provided on the second power line for each of the storage batteries and configured to interrupt or connect the second power line; a plurality of second connection terminals each connected to the first switches; a plurality of third connection terminals each connected to the second switches; a plurality of first signal lines each connecting a control device to the second connection terminals and transmitting control signals for controlling the first switches from the control device to the first switches; and a plurality of second signal lines each connecting the control device to the third connection terminals and transmitting control signals for controlling the second switches from the control device to the second switches. Equipped with. [Effects of the Invention]

[0009] According to the present invention, it is possible to suppress an increase in the number of steps and the complexity of the assembly process in which a plurality of storage batteries are connected in series. [Brief explanation of the drawings]

[0010] [Figure 1]FIG. 1 is a perspective view showing a power storage system including a battery connection module according to one embodiment of the present invention. [Figure 2] FIG. 2 is a plan view showing the power storage system of FIG. [Figure 3] FIG. 3 is a circuit diagram showing the power storage system of FIGS. [Figure 4] FIG. 4 is a circuit diagram showing a modification of the power storage system of FIG. [Figure 5] FIG. 5 is a plan view showing the connection unit of FIGS. 1 and 2. FIG. [Figure 6] FIG. 6 is a plan view showing the connection unit of FIGS. 1 and 2. FIG. [Figure 7] FIG. 7 is a plan view showing the connection unit of FIGS. 1 and 2. FIG. [Figure 8] FIG. 8 is a plan view showing a power storage system including a storage battery connection module according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention will be described below in accordance with preferred embodiments. Note that the present invention is not limited to the embodiments described below, and the embodiments can be modified as appropriate without departing from the spirit of the present invention. In addition, in the embodiments described below, some components are omitted from illustration and description, but for the details of the omitted technologies, publicly known or well-known technologies are applied as appropriate within the scope of not causing any contradictions with the content described below.

[0012] Fig. 1 is a perspective view showing a power storage system 1 including a battery connection module 100 according to one embodiment of the present invention. Fig. 2 is a plan view showing the power storage system 1 of Fig. 1. As shown in these figures, the power storage system 1 includes a battery string 10 and a battery connection module 100.

[0013] The storage battery string 10 is a stationary or vehicle-mounted power supply that includes n storage battery modules M1 to M10 (n is an integer of 2 or greater, and 10 in this embodiment) connected in series. Although not particularly limited, the storage battery string 10 in this embodiment is a refurbished used storage battery, and the storage battery modules M1 to M10 have different degrees of deterioration. The storage battery modules M1 to M10 are, for example, secondary batteries such as lithium-ion batteries or lithium-ion capacitors, and are charged by receiving power from an external system (not shown) via a power converter 130, and then discharge the charged power via the power converter 130 to supply power to the external system.

[0014] The external system includes a load, a generator, etc. When the power storage system 1 is for stationary use, the loads are household appliances, commercial power supply systems, LCD displays, communication modules, etc., and the generator is a solar power generation system, etc. On the other hand, when the power storage system 1 is for vehicle use, the loads are a drive motor, air conditioner, various vehicle electrical components, etc. The drive motor is both a load and a generator.

[0015] The battery string 10 may include a plurality of battery cells or battery packs connected in series instead of the plurality of battery modules M1 to M10 connected in series. As will be described later, the power storage system 1 includes a bypass circuit that bypasses each of the battery modules M1 to M10, but may also include a bypass circuit that bypasses each of the battery cells or battery packs.

[0016] The battery string 10 includes a plurality of voltage sensors 12 (see FIG. 3, etc.). The voltage sensors 12 are connected between the positive electrode terminal P and the negative electrode terminal N of each of the battery modules M1 to M10. The voltage sensors 12 measure the inter-terminal voltage of each of the battery modules M1 to M10.

[0017] The storage battery modules M1 to M10 have a positive terminal P and a negative terminal N to which a wire harness WH1 for supplying power is connected. The positions, sizes, and shapes of the positive terminal P and the negative terminal N vary depending on the product. For example, when regenerating an in-vehicle storage battery module, the positions, sizes, and shapes of the positive terminal P and the negative terminal N vary depending on the vehicle model.

[0018] The storage battery modules M1 to M10 have terminals (not shown) to which a wire harness WH2 for communication and power supply is connected. The position, size, shape, and number, position, and thickness of the terminals vary from product to product. For example, when remanufacturing an in-vehicle storage battery module, the position, size, shape, and number, position, and thickness of the terminals vary from vehicle to vehicle.

[0019] Furthermore, the type of information that the storage battery modules M1-M10 output through the communication wire harness WH2 varies from product to product. For example, when regenerating an in-vehicle storage battery module, the type of information that is output through the communication wire harness WH2 varies from vehicle to vehicle. Examples of information that the storage battery modules M1-M10 output through the communication wire harness WH2 include the inter-terminal voltage of each storage battery module M1-M10 measured by the voltage sensor 12, temperature information if each storage battery module M1-M10 is equipped with a temperature sensor, and abnormality detection information if each storage battery module M1-M10 is equipped with a CMU (Cell Management Unit).

[0020] The battery connection module 100 includes a base plate 101, a plurality of switch units SU1 to SU10, and bus bars 102, 103, 104, 105, and 106. The battery connection module 100 also includes a current sensor 108, a power converter 130, a service plug 140, and a BMS (Battery Management System) 150. The battery connection module 100 also includes a wire harness unit 160 for communication and power supply, a wire harness WH1 for power supply, and a wire harness WH2 for communication and power supply.

[0021] On the other hand, the battery connection module 100 includes n (n is an integer equal to or greater than 2, and is 6 in this embodiment) connection units CU1 to CU6 arranged in a line. The first connection unit CU1 is provided with a power converter 130 and a current sensor 108. Following this connection unit CU1, the connection units CU2 to CU6 are arranged in order. The connection units CU3 to CU5 arranged between the connection unit CU2 and the last connection unit CU6 have a common configuration. The connection units CU2 and CU6 have different configurations from the connection units CU3 to CU5. Furthermore, the connection units CU2 and CU6 have different configurations from each other. However, the connection units CU2 to CU6 include units with a common structure. The connection unit CU2 is fabricated by mounting a BMS 150, etc., on a unit with a common structure. The connection unit CU6 is fabricated by mounting a service plug 140, bus bars 105, 106, etc. on a unit with a common structure. Instead of the bus bars 102 to 106, other conductors capable of passing a large amount of current may be used.

[0022] The storage battery modules M1 to M5 are arranged in a linear row from the front to the rear, and the storage battery modules M6 to M10 are arranged in a linear row from the rear to the front. The row of storage battery modules M1 to M5 and the row of storage battery modules M6 to M10 are arranged parallel to each other, and the storage battery connection module 100 is arranged between them. The storage battery connection module 100 may be arranged overlapping the storage battery modules M1 to M10.

[0023] The connection unit CU2 is disposed between the storage battery modules M1 and M10 and includes a pair of switch units SU1 and SU10. The connection unit CU3 is disposed between the storage battery modules M2 and M9 and includes a pair of switch units SU2 and SU9. The connection unit CU4 is disposed between the storage battery modules M3 and M8 and includes a pair of switch units SU3 and SU8. The connection unit CU5 is disposed between the storage battery modules M4 and M7 and includes a pair of switch units SU4 and SU7. The connection unit CU6 is disposed between the storage battery modules M5 and M6 and includes a pair of switch units SU5 and SU6.

[0024] The storage battery modules M1 to M10 are arranged in order M1, M2, ... M10 in the direction in which the storage battery modules M1 to M10 are connected, while the switch units SU1 to SU10 are arranged in order SU1, SU2, ... SU10 in the direction in which the storage battery modules M1 to M10 are connected. The switch unit SU1 is connected to the positive terminal P and negative terminal N of the storage battery module M1 by a power supply wire harness WH1, and is connected to communication and power supply connection terminals (not shown) of the storage battery module M1 by a communication and power supply wire harness WH2. Similarly, the switch units SU2 to SU10 are connected to the positive terminal P and negative terminal N of the storage battery modules M2 to M10 by the power supply wire harness WH1, and are connected to communication and power supply connection terminals of the storage battery modules M2 to M10 by the communication and power supply wire harness WH2. The switch units SU1 to SU10 have a common configuration. The configuration of the switch units SU1 to SU10 will be described in detail later.

[0025] The power converter 130 is, for example, a bidirectional DC / DC converter, and includes a positive terminal 131 on the primary side during discharge, a negative terminal 132 on the primary side during discharge, a positive terminal (not shown) on the secondary side during discharge, and a negative terminal (not shown) on the secondary side during discharge. The positive terminal 131 is connected to an input terminal 111 of the switch unit SU1 of the connection unit CU2 by a bus bar 102. The negative terminal 132 is connected to a current sensor 108 by a bus bar 103. The current sensor 108 is connected to an output terminal 112 of the switch unit SU10 of the connection unit CU2 by a bus bar 104.

[0026] The output terminal 112 of the switch unit SU1 and the input terminal 111 of the switch unit SU2 are connected by a bus bar 104. Similarly, the switch units SU1 to SU5 that are adjacent in the connection direction of the storage battery modules M1 to M5 are electrically connected by the bus bar 104, and the switch units SU6 to SU10 that are adjacent in the connection direction of the storage battery modules M6 to M10 are electrically connected by the bus bar 104. Here, the adjacent switch units SU1 to SU10 are also mechanically coupled by the bus bar 104, so that the multiple connection units CU2 to CU6 are integrated, and a base plate 101 is configured in which multiple plates 110 (see FIG. 5, etc.) are integrated.

[0027] FIG. 3 is a circuit diagram showing the power storage system 1 of FIGS. 1 and 2. As shown in this figure, the power storage system 1 includes n bypass circuits (n is an integer of 2 or more, and is 10 in this embodiment) provided for each of the storage battery modules M1 to M10. Each bypass circuit includes a bypass line BL and switches S1 and S2. The bypass line BL is a power line that bypasses each of the storage battery modules M1 to M10. The switch S1 is provided on the bypass line BL. This switch S1 is, for example, a mechanical switch. The switch S2 is provided between the positive electrode of each of the storage battery modules M1 to M10 and one end of the bypass line BL. This switch S2 is, for example, a semiconductor switch or a relay.

[0028] When switch S1 is open and switch S2 is closed in all the bypass circuits, all the storage battery modules M1 to M10 are connected in series to the power converter 130 and an external system (not shown). On the other hand, when switch S2 is open and switch S1 is closed in any of the bypass circuits, the storage battery modules M1 to M10 corresponding to that bypass circuit are bypassed.

[0029] The switches S1 and S2 are provided in switch units SU1 to SU10 (see FIG. 1). The switch units SU1 to SU10 are connected to a BMS 150 (see FIG. 1, etc.), which monitors and controls each of the storage battery modules M1 to M10, and controls switching of each bypass circuit.

[0030] Fig. 4 is a circuit diagram showing a modified example of the power storage system 1 of Fig. 3. As shown in Fig. 3 and Fig. 4, the number of connected storage battery modules M1 to M10 can be increased or decreased in the power storage system 1. Correspondingly, for connection units CU1 to CU10 (see Fig. 1, etc.) in which the number of connected storage battery modules M1 to M10 is 1 or 0, it is possible to not implement switch units SU1 to SU10, or to not implement at least one of switches S1 and S2 in the switch units SU1 to SU10.

[0031] Here, each of the switch units SU1 to SU10 is provided with a power line (not shown) and a bypass line BL. The power line connects a bus bar (104, etc.) provided on a plate 110 (see FIG. 5, etc.) to a connection terminal 113 (see FIG. 5), which will be described later. A switch S2 is provided on this power line.

[0032] When the number of storage battery modules M1 to M10 connected to the connection units CU1 to CU10 is 1 or 0, the following measures (1) to (3) are possible. (1) As shown in FIG. 4, the corresponding switch units SU1 to SU10 are not mounted, jumpers JP are attached to the positions of the switch units SU1 to SU10 on the plate 110, and the bus bars (104, etc.) on the plate 110 are connected by the jumpers JP. (2) Switch S1 is not mounted on switch units SU1 to SU10, and a jumper JP is attached to the position of switch S1 on switch units SU1 to SU10, and the bypass line BL is connected via a jumper (not shown). Note that switch S2 may be either mounted or not mounted. (3) Switch S2 is not mounted on switch units SU1 to SU10, and a jumper (not shown) is attached between the position of switch S2 on switch units SU1 to SU10 and the position of connection terminal 113 to connect the power lines on switch units SU1 to SU10. Switch S1 may be either mounted or not mounted.

[0033] On the other hand, it is possible to not provide a bypass circuit or to increase or decrease the number of bypass circuits in the power storage system 1. When the number of bypass circuits in the connection units CU1 to CU10 is 1 or 0, the following measures (4) to (6) are possible. (4) The switch units SU1 to SU10 are replaced with jumper units (not shown) that do not have bypass circuits and have a structure for connecting the storage battery modules M1 to M10 to the bus bars (104, etc.) on the plate 110. (5) The switch units SU1 to SU10 are not implemented, and a connection terminal (not shown) is provided in place of the connection terminal 113, and a jumper (not shown) is attached between the connection terminal and the bus bar (104, etc.) on the plate 110 to connect the two. (6) Switch S2 is not installed in switch units SU1 to SU10, and a jumper (not shown) is attached to the position of switch S2 on switch units SU1 to SU10 to connect the power lines on switch units SU1 to SU10. Note that switch S1 may be either installed or not installed.

[0034] 1 and 2. Note that connection units CU4 and CU5 have the same configuration as connection unit CU3. As shown in this figure, connection unit CU3 includes a plate 110 and a pair of switch units SU2 and SU9. Plate 110 is an insulating plate material. Examples of materials for plate 110 include resin and bakelite.

[0035] Here, the plate 110 is a common part for the connection units CU2 to CU6, and the plates 110 of the connection units CU2 to CU6 have the same shape, dimensions, and material. A plurality of these plates 110 are arranged in a row to form a long base plate 101 (see FIG. 1, etc.).

[0036] The pair of switch units SU2, SU9 are mounted on the plate 110 so as to face each other with the wire harness unit 160 for communication and power supply in between. The switch unit SU2 faces the storage battery module M2, and the switch unit SU9 faces the storage battery module M9. The switch unit SU2 and the switch unit SU9 may be integrated.

[0037] The positive electrode terminals P and negative electrode terminals N of the storage battery modules M1 to M10 are provided on the top surfaces of the storage battery modules M1 to M10, spaced apart in the arrangement direction of the connection units CU1 to CU6 (left and right direction in the figure). The power supply wire harness WH1 includes a positive electrode wiring WHP, a negative electrode wiring WHN, and a bundle WHB that bundles the positive electrode wiring WHP and the negative electrode wiring WHN. A connection terminal 114 connected to the positive electrode terminal P is provided at the tip of the positive electrode wiring WHP, and a connection terminal 115 connected to the negative electrode terminal N is provided at the tip of the negative electrode wiring WHN. A connection terminal 116 is provided at the base end of the bundle WHB. Meanwhile, a connection terminal 113 is provided on the top surface of each of the switch units SU1 to SU10, and the connection terminal 113 is connected to the connection terminal 116 of the power supply wire harness WH1. Furthermore, each of the switch units SU1 to SU10 is provided with a connection terminal 118, to which a connection terminal 117 of a wire harness WH2 for communication and power supply is connected.

[0038] Here, the power supply wire harness WH1 is a dedicated product provided for each type of storage battery module M1-M10 to be connected. That is, the configuration of connection terminals 114, 115 of the power supply wire harness WH1, as well as the length and thickness of the power supply wire harness WH1, are set for each type of storage battery module M1-M10 to be connected. Note that the connection terminal 116 of the power supply wire harness WH1 is common to all types of storage battery modules M1-M10.

[0039] Furthermore, the wire harness WH2 for communication and power supply is a dedicated product provided for each type of storage battery module M1-M10 to be connected. That is, the length and thickness of the wire harness WH2 for communication and power supply, and the configuration of the connection terminals connected to the connection terminals of the storage battery modules M1-M10, are set for each type of storage battery module M1-M10 to be connected. Note that the connection terminals 117 of the wire harness WH2 for communication and power supply, which are connected to the connection terminals 118 of the switch units SU1-SU10, are standardized regardless of the type of storage battery modules M1-M10.

[0040] The communication and power supply wire harness unit 160 includes a bundle 161 in which a plurality of communication wire harnesses and a power supply wire harness are bundled together, and branch lines 162, 163, 164, 165, and 166 in which the respective wire harnesses branch off from the bundle 161. The bundle 161 is wired above the connection units CU2 to CU6 so as to extend in the arrangement direction of the connection units CU2 to CU6. The base end of the bundle 161 is connected to the BMS 150 (see FIG. 1).

[0041] The branch lines 162 and 163 are signal lines for transmitting a control signal for the switch S1. On the other hand, the switch units SU1 to SU10 are provided with connection terminals 119 to which the branch lines 162 and 163 are connected.

[0042] The branch lines 164 and 165 are signal lines for transmitting a control signal for the switch S2. On the other hand, the switch units SU1 to SU10 are provided with connection terminals 120 to which the branch lines 164 and 165 are connected.

[0043] The branch line 166 includes a signal line for communication with the storage battery modules M1-M10 and a power line for supplying power from the BMS 150 to communication circuits (not shown) in the storage battery modules M1-M10. Meanwhile, the switch units SU1-SU10 are provided with connection terminals 118 to which the branch line 166 and a wire harness WH2 for communication and power supply are connected. Electrical components such as the BMS 150, the power converter 130, and the communication circuits in the storage battery modules M1-M10 are supplied with power from a higher-level power supply. Note that power may also be supplied from the higher-level power supply to the communication circuits in the storage battery modules M1-M10 without going through the BMS 150.

[0044] The switch units SU1 to SU10 each include a power line (not shown) and switches S1 and S2. The power line is placed on a bypass line BL (see FIG. 3, etc.) provided on the plate 110, with an insulating layer interposed between them. The switch S1 is connected to the bypass line BL, and the switch S2 is connected to the power line.

[0045] When the switch units SU1 to SU10 are mounted on the plate 110, the power lines on the switch units SU1 to SU10 side are connected to the bypass lines BL on the plate 110 side. In addition, the power lines of adjacent switch units SU1 to SU10 are connected to each other by bus bars 104.

[0046] Fig. 6 is a plan view showing the connection unit CU2 shown in Figs. 1 and 2. As shown in this figure, the connection unit CU2, which is disposed between the storage battery modules M1 and M10, is provided with a BMS 150. A bundle portion 161 of a wire harness unit 160 for communication and power supply is connected to this BMS 150. The BMS 150 and the power converter 130 (see Fig. 1) are also connected by a wire harness 133 for communication. Note that the BMS 150 may be provided in the other connection units CU1, CU3 to CU6.

[0047] The configuration of the connection unit CU2 is the same as the connection units CU3 to CU5, except that the BMS 150 is mounted on the plate 110. The connection unit CU2 is produced by mounting the BMS 150 on the connection units CU3 to CU5.

[0048] Fig. 7 is a plan view showing the connection unit CU6 shown in Fig. 1 and Fig. 2. As shown in this figure, the connection unit CU6, which is disposed between the storage battery modules M5 and M6, is provided with a service plug 140. This service plug 140 and the output terminal 112 of the switch unit SU5 are electrically connected by a bus bar 105, and the service plug 140 and the input terminal 111 of the switch unit SU6 are electrically connected by a bus bar 106.

[0049] The configuration of connection unit CU6 is common to connection units CU3 to CU5, except that service plug 140 and bus bars 105, 106 are mounted on plate 110. Connection unit CU6 is fabricated by mounting service plug 140 and bus bars 105, 106 on connection units CU3 to CU5.

[0050] As described above, the storage battery connection module 100 of this embodiment modularizes the base plate 101, the multiple connection terminals 113, power lines such as the bus bar 104, and the multiple power supply wire harnesses WH1. The multiple connection terminals 113 are provided corresponding to each of the storage battery modules M1 to M10, the power lines such as the bus bar 104 connect the multiple connection terminals 113 in series, and the multiple power supply wire harnesses WH1 connect the positive terminal P and negative terminal N of each of the storage battery modules M1 to M10 to the connection terminals 113, respectively.

[0051] Here, in the assembly process for connecting the multiple storage battery modules M1 to M10, power lines such as bus bars 104 are already wired on the base plate 101, and multiple connection terminals 113 are also mounted on the base plate 101, before the start of the assembly process. Therefore, in the assembly process, the multiple storage battery modules M1 to M10 can be connected in series by simply connecting the connection terminals 114, 115 of the power supply wire harness WH1, which is wired corresponding to each storage battery module M1 to M10, to the positive terminal P or the negative terminal N, respectively. Therefore, an increase in the number of steps and complexity of the assembly process can be suppressed. Furthermore, by realizing a reduction in operational errors and a reduction in the complexity of wiring in the assembly process, the risk of failure of the energy storage system 1 can be reduced, and the maintenance costs of the energy storage system 1 can be reduced.

[0052] Furthermore, in the power storage system 1 of this embodiment, the storage battery modules M1-M10 are refurbished, whereas the power supply wire harness WH1 is a dedicated product manufactured specifically for each type of storage battery module M1-M10. Here, for example, when an in-vehicle storage battery module is refurbished and used, the position, size, and shape of the positive electrode terminal P and the negative electrode terminal N will differ depending on the vehicle model, and the voltage will also differ depending on the vehicle model. In contrast, in the storage battery connection module 100 of this embodiment, the power supply wire harness WH1 is dedicated to each type of storage battery module, such as each vehicle model. As a result, the storage battery connection module 100 of this embodiment makes it possible to connect multiple storage battery modules M1-M10 in series, regardless of the type of storage battery modules M1-M10 being refurbished.

[0053] Furthermore, in the battery connection module 100 of this embodiment, the base plate 101 is composed of multiple integrated insulating plates 110. This reduces the component cost of the base plate 101 compared to when it is composed of a single long plate. Here, the connection units CU2 to CU6, each equipped with the plate 110 and the connection terminal 113, include a unit with a common structure, and are common components with some or all of the configuration. Therefore, by increasing or decreasing the number of units with this common structure, it is possible to easily accommodate an increase or decrease in the number of connected battery modules M1 to M10, thereby improving versatility. Furthermore, by adding necessary components to the units with a common structure for the connection units CU2 to CU6, it is possible to flexibly accommodate changes in the configuration of the battery connection module 100, such as the presence or absence of a current sensor 108, a service plug 140, or a BMS 150.

[0054] Furthermore, in the storage battery connection module 100 of this embodiment, a bypass line BL, a switch S1 that interrupts or connects the bypass line BL, and a switch S2 that interrupts or connects the power line are provided corresponding to each of the storage battery modules M1 to M10. This increases the number of wires and the number of wire connection points in the power storage system 1. In contrast, in the storage battery connection module 100 of this embodiment, a wire harness unit 160 for communication and power supply that transmits control signals to the switches S1 and S2 is wired on the base plate 101. This eliminates the need for wiring and connecting the wire harness unit 160 for communication and power supply in the assembly process of connecting the multiple storage battery modules M1 to M10 so that they can communicate with each other, thereby preventing an increase in the number of steps and complexity of the assembly process.

[0055] Furthermore, in the storage battery connection module 100 of this embodiment, switch units SU1 to SU10 each including switches S1 and S2 are provided corresponding to each of the storage battery modules M1 to M10. Here, using the common connection units CU2 to CU6, it is possible to select whether or not to mount the switch units SU1 to SU10 on the plate 110. This makes it possible to easily and flexibly accommodate an increase or decrease in the number of connected storage battery modules M1 to M10, thereby enhancing versatility.

[0056] Furthermore, when the switch units SU1 to SU10 are not installed, jumpers JP can be attached to the positions of the switch units SU1 to SU10 on the plate 110, and the bus bars (104, etc.) on the plate 110 can be connected using the jumpers JP. This allows for easy and flexible adjustment to accommodate increases or decreases in the number of connected storage battery modules M1 to M10, improving versatility. Also, when switch units SU1 to SU10 to which storage battery modules M1 to M10 are not connected are installed, it is necessary to turn on the switch S1 of the switch unit SU1 to SU10 and turn off the switch S2, requiring that power be supplied to the switches S1 and S2. However, by not installing the switch units SU1 to SU10 and using the jumpers JP to connect the power lines, it is possible to achieve power savings.

[0057] On the other hand, it is possible to select whether or not to implement switches S1 and S2 in switch units SU1 to SU10. Here, if switch S1 is not implemented in switch units SU1 to SU10, a jumper (not shown) can be attached to the position of switch S1 on switch units SU1 to SU10 and the bypass line BL can be connected via the jumper. Also, if switch S2 is not implemented in switch units SU1 to SU10, a jumper (not shown) can be attached to the position of switch S2 on switch units SU1 to SU10 and the position of connection terminal 113 to connect the power line on switch units SU1 to SU10. This allows the number of storage battery modules M1 to M10 connected to connection units CU1 to CU10 to be either 1 or 0.

[0058] Furthermore, when the switch units SU1 to SU10 are not implemented, they can be replaced with a jumper unit (not shown) that does not have a bypass circuit and has a structure for connecting the storage battery modules M1 to M10 to the bus bar (104, etc.) on the plate 110. Alternatively, when the switch units SU1 to SU10 are not implemented, a connection terminal (not shown) can be provided in place of the connection terminal 113, and a jumper (not shown) can be attached between the connection terminal and the bus bar (104, etc.) on the plate 110 to connect them. This allows the storage battery modules M1 to M10 to be connected without the bypass function when it is not necessary.

[0059] Furthermore, when switch S2 is not implemented in switch units SU1 to SU10, a jumper (not shown) can be attached to the position of switch S2 on switch units SU1 to SU10 to connect the power lines on switch units SU1 to SU10. This allows the storage battery modules M1 to M10 to be connected without the bypass function when the bypass function is not required.

[0060] Furthermore, the switch units SU1 to SU10 include connection terminals 119 and 120 to which branch lines 162 to 165 that transmit control signals for controlling the switches S1 and S2 are connected. Therefore, it is possible to select whether to implement or not implement the switch units SU1 to SU10 and whether to implement or not implement the connection terminals 119 and 120 at the same time.

[0061] The battery connection module 100 of this embodiment also includes a plurality of connection terminals 118 and a plurality of communication and power supply wire harnesses WH2. The communication and power supply wire harness WH2 connects the connection terminals 118 to the communication and power supply connection terminals provided on the storage battery modules M1 to M10. In the assembly process for connecting the plurality of storage battery modules M1 to M10, the plurality of connection terminals 118 are already mounted on the base plate 101, and the communication and power supply wire harness WH2 is also wired in the battery connection module 100 before the start of the assembly process. Therefore, in the assembly process, the plurality of storage battery modules M1 to M10 can be communicatively connected by the simple operation of connecting the connection terminals of the communication and power supply wire harness WH2 wired corresponding to each storage battery module M1 to M10 to the communication and power supply connection terminals of the storage battery modules M1 to M10, respectively. This prevents an increase in the number of steps and complexity of the assembly process.

[0062] Furthermore, in the storage battery connection module 100 of this embodiment, the wire harness WH2 for communication and power supply is a dedicated product manufactured specifically for each type of refurbished storage battery module M1-M10. For example, when refurbishment of vehicle-mounted storage battery modules, the position, size, and shape of the connection terminals for communication and power supply, as well as the number, position, and thickness of the pins, vary depending on the vehicle model. Furthermore, the type of information output from the storage battery modules M1-M10 also varies depending on the vehicle model. In contrast, in the storage battery connection module 100 of this embodiment, the wire harness WH2 for communication and power supply is dedicated to each type of storage battery module, such as each vehicle model. As a result, the storage battery connection module 100 of this embodiment makes it possible to communicatively connect multiple storage battery modules M1-M10 regardless of the type of storage battery modules M1-M10 being refurbished.

[0063] 8 is a plan view showing a power storage system 2 including a storage battery connection module 200 according to another embodiment of the present invention. As shown in this figure, the power storage system 2 of this embodiment includes a storage battery string 10 and a storage battery connection module 200. Note that the same reference numerals are used to designate components similar to those in the above-described embodiment, and the description of the above-described embodiment is incorporated herein by reference.

[0064] The battery connection module 200 includes a base plate 201, a power line 202, switches S1 and S2 (the same number as the number of battery modules M1 to M10), a current sensor 108, a power converter 130, a service plug 140, and a BMS 150. The battery connection module 200 also includes a wire harness unit 160 for communication and power supply, a wire harness WH1 for power supply, and a wire harness WH2 for communication and power supply. The battery connection module 200 also includes connection terminals 113 and 118 (the same number as the number of battery modules M1 to M10).

[0065] Base plate 201 is made up of a single long insulating plate. Power lines 202 are provided on base plate 201. Power lines 202 are made up of multiple conductors, such as bus bars, for carrying large amounts of current. In this embodiment, the conductors are bus bars.

[0066] The power line 202 connects the multiple storage battery modules M1 to M10 in series. The power line 202 also includes a U-shaped main power line PL and a bypass line BL for each of the storage battery modules M1 to M10. The bypass line BL connects both ends of the main power line PL.

[0067] The main power line PL is provided with a connection terminal 113 and a switch S2. The bypass line BL is provided with a switch S1. A power supply wire harness WH1 is connected to the connection terminal 113, and branch lines 164 and 165 are connected to the switch S2. Branch lines 162 and 163 are connected to the switch S1. Note that, as in the above-described embodiment, switch units SU1 to SU10 may be implemented.

[0068] Furthermore, a connection terminal 118 is mounted for each of the storage battery modules M1 to M10 on the base plate 201. A wire harness WH2 for communication and power supply and a branch line 166 are connected to the connection terminal 118.

[0069] In the power storage system 2 of this embodiment, the power supply wire harness WH1 is also a dedicated product provided for each type of storage battery modules M1 to M10 to be connected. That is, the configuration of the connection terminals 114, 115 of the power supply wire harness WH1, the length, thickness, etc. of the power supply wire harness WH1 are set for each type of storage battery modules M1 to M10 to be connected.

[0070] Also in the power storage system 2 of this embodiment, the wire harness WH2 for communication and power supply is a dedicated product provided for each type of storage battery module M1 to M10 to be connected. That is, the length, thickness, and configuration of the connection terminals of the wire harness WH2 for communication and power supply are set for each type of storage battery module M1 to M10 to be connected.

[0071] As described above, the storage battery connection module 200 of this embodiment has the same configuration as the storage battery connection module 100 of the above-described embodiment, except that the base plate 201 is configured from a single elongated plate. Therefore, the storage battery connection module 200 of this embodiment can achieve the same effects as the above-described embodiment.

[0072] The present invention has been described above based on the above-mentioned embodiment, but the present invention is not limited to the above-mentioned embodiment, and modifications may be made within the scope of the spirit of the present invention, and publicly known or well-known technologies may be combined as appropriate.

[0073] For example, in the above-described embodiments, the battery connection modules 100, 200 include a power converter 130, a service plug 140, a BMS 150, and a wire harness unit 160 for communication and power supply, but these are not required to be included.

[0074] In the above-described embodiment, the battery connection modules 100, 200 include the bypass line BL and the switches S1, S2, but these are not essential. For example, if the deterioration state of the battery modules M1 to M10 is uniform, it is possible not to provide the bypass line BL and the switches S1, S2. [Explanation of symbols]

[0075] 1: Energy storage system 2: Energy storage system 100: Battery connection module 101: Base plate 102: Busbar (Second Power line) 103: Busbar (Second Power line) 104: Busbar (Second Power line) 105: Busbar (Second Power line) 106: Busbar (Second Power line) 110: Plate 113: Connection terminal (first connection terminal child) 118: Connection terminal (part 4 Connection terminal) 119: Connection terminal (second connection terminal) 120: Connection terminal (No. 3 Connection terminal) 150: BMS (control device) 160: Wire harness unit (first signal line, A second signal line, 4th Power Line) 161: Bundle portion (first signal line, A second signal line, 4th Power Line) 162: Branch line (first signal line) 163: Branch line (first signal line) 164: Branch line (No. 2 signal line) 165: Branch line (No. 2 signal line) 166: Branch line (4th power line) 200: Battery connection module 201: Base plate (long plate) 202: Power line (second power line) BL: Bypass line CU1 to CU6: Connection units JP: Jumper M1 to M10: Battery modules (batteries) N: Negative terminal P:Positive terminal PL: Main power line (secondary power line) S1: Switch (first switch) S2: Switch (second switch) SU1 to SU10: Switch units WH1: Wire harness (first power line) WH2: Wire harness (part 3 signal line, third power line)

Claims

1. A battery connection module for connecting a plurality of linearly aligned storage batteries in series, a base plate formed of a plurality of integrated insulating plates or a single long insulating plate and extending along the row of storage batteries; a plurality of first connection terminals arranged linearly at intervals along the row of the storage batteries on the base plate; a plurality of first power lines each connecting one of the first connection terminals to the positive terminal and the negative terminal of one of the storage batteries; and a plurality of first power lines each connecting one of the first connection terminals to the positive terminal and the negative terminal of one of the storage batteries. a second power line provided on the base plate and connecting the first connection terminals in series via the first power lines and the storage batteries; a plurality of bypass lines provided on the base plate for the respective storage batteries and connected to the second power line so as to bypass the first connection terminal; a plurality of first switches provided in the bypass line for each of the storage batteries, the first switches blocking or connecting the bypass line; a plurality of second switches each provided on the second power line for each of the storage batteries, the second switches configured to interrupt or connect the second power line; a plurality of second connection terminals each connected to the first switch; a plurality of third connection terminals each connected to the second switch; a plurality of first signal lines, each of which is a wire harness connecting a control device and the second connection terminal, for transmitting a control signal for controlling the first switch from the control device to the first switch; a plurality of second signal lines, each of which is a wire harness connecting the control device and the third connection terminal, for transmitting a control signal for controlling the second switch from the control device to the second switch; A battery connection module comprising:

2. the storage battery is refurbished; The battery connection module according to claim 1 , wherein the first power line is a dedicated product manufactured specifically for each type of the storage battery.

3. the base plate is composed of a plurality of integrated insulating plates, the plate is provided with the first connection terminal; a plurality of connection units each including the plate and the first connection terminal; The battery connection module according to claim 1 , wherein the plurality of connection units are common components having a common structure.

4. The battery connection module according to claim 1 , comprising a plurality of switch units each mounted on the base plate and including the first switch, the second switch, the bypass line, and the first connection terminal.

5. The switch unit is configured to be selectively mounted or unmounted on the base plate, or the first switch and / or the second switch is configured to be selectively mounted or unmounted on the switch unit, When the switch unit is not mounted on the base plate, the second power line is connected by a jumper; When the first switch is not mounted to the switch unit, the bypass line is connected by a jumper; The battery connection module according to claim 4 , wherein the second power line is connected by a jumper when the second switch is not mounted on the switch unit.

6. The switch unit is configured to be selectively mounted or unmounted on the base plate, or the first switch and / or the second switch is configured to be selectively mounted or unmounted on the switch unit, When the switch unit is not mounted on the base plate, the first power line and the second power line are connected by a jumper, The battery connection module according to claim 4 , wherein the first power line and the second power line are connected by a jumper when the second switch is not mounted on the switch unit.

7. The battery connection module according to claim 4 , wherein the switch unit includes the second connection terminal and the third connection terminal.

8. A plurality of fourth connection terminals each connected to the control device; a plurality of third signal lines, each of which is a wire harness connecting a communication connection terminal provided on the storage battery to the fourth connection terminal; The battery connection module of claim 1 , comprising:

9. the storage battery is refurbished; The storage battery connection module according to claim 8 , wherein the third signal line is a dedicated product manufactured specifically for each type of storage battery.

10. the control device that outputs the control signal transmitted through the first signal line and the second signal line; a plurality of third power lines each connecting a power supply connection terminal provided on the storage battery to the fourth connection terminal; a fourth power line connecting the plurality of fourth connection terminals and the control device; The battery connection module of claim 8 , comprising:

11. A plurality of linearly aligned storage batteries; a battery connection module that connects a plurality of the batteries in series; A power storage system comprising: The battery connection module includes: a base plate formed of a plurality of integrated insulating plates or a single long insulating plate and extending along the row of storage batteries; a plurality of first connection terminals arranged linearly at intervals along the row of the storage batteries on the base plate; a plurality of first power lines each connecting one of the first connection terminals to the positive terminal and the negative terminal of one of the storage batteries; and a plurality of first power lines each connecting one of the first connection terminals to the positive terminal and the negative terminal of one of the storage batteries. a second power line provided on the base plate and connecting the first connection terminals in series via the first power lines and the storage batteries; a plurality of bypass lines provided on the base plate for the respective storage batteries and connected to the second power line so as to bypass the first connection terminal; a plurality of first switches provided in the bypass line for each of the storage batteries, the first switches blocking or connecting the bypass line; a plurality of second switches each provided on the second power line for each of the storage batteries, the second switches configured to interrupt or connect the second power line; a plurality of second connection terminals each connected to the first switch; a plurality of third connection terminals each connected to the second switch; a plurality of first signal lines, each of which is a wire harness connecting a control device and the second connection terminal, for transmitting a control signal for controlling the first switch from the control device to the first switch; a plurality of second signal lines, each of which is a wire harness connecting the control device and the third connection terminal, for transmitting a control signal for controlling the second switch from the control device to the second switch; A power storage system comprising:

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