Battery assembly module and component attaching method for battery assembly

Abstract

To suppress the decrease in maintainability of a battery assembly.SOLUTION: A battery assembly module includes a battery assembly including a plurality of cells, a monitor device that monitors the state of at least one cell, a fixing member that fixes wires of the monitor device disposed on the cells to the cells, and a supply pipe disposed over the wire and being able to supply liquid to each cell.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a battery assembly module and a method for attaching components to a battery assembly. [Background technology]

[0002] In Patent Document 1, a control module is placed on the top surface of a battery (battery pack) that has multiple cells. Wires extend from each sensor that monitors the state of the cells to this control module. These wires pass through a wiring support provided on the top surface of the battery. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-514159 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the wire passing portion of the wire support is formed to be wide. This allows the wires to move freely along the upper surface of the battery, which may cause problems with the wires due to friction caused by the movement. If problems occur with the wires, there is a concern that the maintainability of the battery pack may be reduced.

[0005] The present disclosure aims to suppress a decrease in the maintainability of a battery pack. [Means for solving the problem]

[0006] A first aspect of the battery module of the present disclosure includes a battery assembly having a plurality of cells, a monitoring device that monitors the state of at least one of the cells, a fixing member that fixes wiring of the monitoring device arranged on the plurality of cells to the cells, and a supply pipe that is arranged above the wiring and can supply liquid to each of the cells.

[0007] In the battery module of the first aspect, for example, even if vibrations or the like are applied to the battery pack, friction between the wiring and the cells is suppressed because the wiring of the monitoring device is fixed to the cells by a fixing member. Friction between the wiring and the connecting members that electrically connect the electrodes of adjacent cells can also be suppressed. As a result, in the battery pack module described above, problems with the wiring are less likely to occur compared to a configuration in which the wiring is movable relative to the cells, and deterioration in the maintainability of the battery pack can be suppressed. Furthermore, in the battery module, since the supply pipe is arranged above the wiring, the work of connecting the supply pipe to the liquid supply means during maintenance to supply liquid to each cell is easier than in a configuration in which the supply pipe is arranged below the wiring, and this makes it possible to prevent a decrease in maintainability of the battery module.

[0008] A second aspect of the battery module of the present disclosure is the battery module of the first aspect, further comprising a connection member that electrically connects electrodes of adjacent cells to each other, and an insulating cover that covers the connection member, and the fixing member fixes the wiring to the insulating cover.

[0009] In the battery module of the second aspect, the wiring is fixed to the insulating cover that covers the connection member with a fixing member, so the cell structure can be simplified compared to a configuration in which a dedicated portion for fixing the wiring with a fixing member is provided in the cell.

[0010] A third aspect of the battery module of the present disclosure is the battery module of the second aspect, wherein the fixing member is a band-shaped binding member, and the binding member binds the insulating cover and the wiring together, thereby fixing the wiring to the cell via the insulating cover.

[0011] In the battery module of the third aspect, the insulating cover and the wiring are bound together with a strip-shaped binding member, thereby fixing the wiring to the cells via the insulating cover. In this way, in the battery module described above, the wiring can be fixed to the cells by binding the insulating cover and the wiring with the binding member, compared to, for example, a case in which the fixing member and the wiring, and the fixing member and the insulating cover are separately fixed, so that the burden of the wiring work can be reduced.

[0012] A fourth aspect of the battery module of the present disclosure is the battery module of the third aspect, wherein the bundling member bundles a plurality of the wires together.

[0013] In the battery module of the fourth aspect, multiple wires are bound together using a binding member and fixed to the cell, which reduces the burden of wiring work compared to, for example, a configuration in which each wire is fixed to the cell separately.

[0014] A fifth aspect of the battery module of the present disclosure is a battery module of any one of the first to fourth aspects, wherein the monitoring device includes a liquid level sensor that detects the liquid level in the cell, and wiring of the liquid level sensor is fixed to the cell by the fixing member.

[0015] In the battery module of the fifth aspect, the wiring of the liquid level sensor is fixed to the cell with a fixing member, which makes it less likely that problems will occur in the wiring of the liquid level sensor. In the battery module, the liquid level is detected by the liquid level sensor to monitor the state of the cell, so that the wiring of the liquid level sensor is less likely to be damaged, making it possible to stably monitor the state of the cell.

[0016] A sixth aspect of the battery module of the present disclosure is the battery module of the fifth aspect, wherein the monitoring device includes a display unit that displays the detection result detected by the liquid level sensor.

[0017] In the battery module of the sixth aspect, the detection result detected by the liquid level sensor is displayed on the display unit, so that the user can visually check the liquid level (liquid level) of the battery pack.

[0018] A seventh aspect of the battery module of the present disclosure is a battery module according to any one of the first to sixth aspects, wherein the monitoring device includes a temperature sensor that detects the temperature of the cell, and wiring of the temperature sensor is fixed to the cell by the fixing member.

[0019] In the battery module of the seventh aspect, the wiring of the temperature sensor is fixed to the cell with a fixing member, which makes it less likely that problems will occur in the wiring of the temperature sensor. In the battery module, the cell state is monitored by detecting the cell temperature with the temperature sensor, so that the wiring of the temperature sensor is less likely to be damaged, which makes it possible to stably monitor the state of the cell.

[0020] A method for installing components in a battery pack according to an eighth aspect of the present disclosure includes preparing a battery pack having a plurality of cells, arranging wiring for a monitoring device that monitors the state of the cells on the plurality of cells, fixing the wiring to the cells using a fixing member, and, after fixing the wiring to the cells, arranging a supply pipe capable of supplying liquid to each of the cells on the plurality of cells.

[0021] In an eighth aspect of the battery assembly component installation method, a battery assembly including a plurality of cells is first prepared. Next, wiring for a monitoring device is placed on the plurality of cells and fixed to the cells with a fixing member. After the wiring is fixed to the cells, a supply pipe capable of supplying a liquid to each cell is installed above the plurality of cells. In this battery assembly component installation method, even if the battery assembly is subjected to vibration or the like, friction between the wiring and the cells is reduced because the wiring for the monitoring device is fixed to the cells with the fixing member. Furthermore, friction between the wiring and the connecting member electrically connecting the electrodes of adjacent cells can also be reduced. As a result, the battery assembly component installation method is less likely to cause problems with the wiring and less likely to reduce the maintainability of the battery assembly compared to a method in which the wiring is arranged movably relative to the cells.

[0022] A ninth aspect of the present disclosure is a battery assembly component installation method, in which, in the eighth aspect of the battery assembly component installation method, the wiring is fixed to the cell via the insulating cover by using the fixing member to fix the wiring to an insulating cover that covers a connecting member that electrically connects the electrodes of adjacent cells.

[0023] In the battery pack component installation method of the ninth aspect, the wiring is fixed with fixing members to an insulating cover that covers a connection member placed on top of the cell, thereby reducing the burden associated with the work of fixing the wiring using fixing members.

[0024] A tenth aspect of the present disclosure is a method for installing components in a battery assembly, in which, in the method for installing components in a battery assembly of the ninth aspect, the fixing member is a band-shaped binding member, and the insulating cover and the wiring are bound together using the binding member, thereby fixing the wiring to the cell via the insulating cover.

[0025] In the battery pack component installation method of the tenth aspect, the insulating cover and the wiring are bound together using a strip-shaped binding member, thereby fixing the wiring to the cell via the insulating cover. Therefore, compared to a method in which, for example, the fixing member and the wiring, and the fixing member and the insulating cover are separately bound together, the wiring can be fixed to the cell by the binding work using the binding member, thereby reducing the burden on the wiring work. [Effects of the Invention]

[0026] According to the present disclosure, it is possible to suppress a decrease in the maintainability of the battery pack. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a diagram showing a schematic configuration of a battery maintenance system having a battery module according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a block diagram showing the configuration of a control system of a battery module according to an embodiment of the present disclosure. [Figure 3] FIG. 1 is a schematic plan view of a battery module according to one embodiment of the present disclosure. [Figure 4] 3 is a cross-sectional view showing the configuration of a first cell, an on-off valve, and a first liquid level sensor used in a battery module according to an embodiment of the present disclosure. FIG. [Figure 5] FIG. 2 is a cross-sectional view showing the configuration of a second cell, an on-off valve, and a second liquid level sensor used in the battery module of one embodiment of the present disclosure. [Figure 6] FIG. 2 is a cross-sectional view showing the configuration of a third cell and an on-off valve used in the battery module according to one embodiment of the present disclosure. [Figure 7] FIG. 2 is a diagram showing the locations where wires are tied together in a battery module according to one embodiment of the present disclosure. [Figure 8] FIG. 10 is a diagram showing the locations where wires are bound in a battery module according to another embodiment of the present disclosure. [Figure 9] 10 is a diagram showing a schematic configuration of a battery maintenance system having a battery module according to another embodiment of the present disclosure. [Figure 10] 10 is a diagram showing a schematic configuration of a battery maintenance system having a battery module according to another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0028] An embodiment of the present disclosure will be described below with reference to the drawings. In each drawing, the same or equivalent components and parts are denoted by the same reference numerals. Furthermore, the dimensional proportions in the drawings are exaggerated for the sake of explanation and may differ from the actual proportions.

[0029] As shown in FIG. 1, a battery maintenance system 10 (hereinafter referred to as "system 10" where appropriate) of this embodiment is a system that has the function of supplying liquid to a battery 110 (hereinafter referred to as "liquid supply") as an assembled battery. Note that in the figure, the liquid to be supplied to the battery 110 is indicated by the symbol FL. Also in the figure, the stored liquid stored in the cell 112 is indicated by the symbol RL. Also in the figure, the supply direction of the liquid FL (hereinafter referred to as "liquid supply direction" where appropriate) is indicated by an arrow SD. Also in the figure, the upward direction in the direction of gravity is indicated by an arrow UP.

[0030] First, before describing the system 10, a battery module 100 as a battery pack module including a battery 110 to which the liquid FL is supplied by the system 10 will be described.

[0031] <Battery module 100> 1, the battery module 100 includes a battery 110 having a plurality of cells 112, a monitoring device 18 that monitors the state of at least one of the cells 112, bundling members 88 (see FIG. 7) as fixing members that fix wiring 80 of the monitoring device 18 arranged on the plurality of cells to the cells 112, and a supply pipe 20 that is arranged above the wiring 80 and can supply liquid to each of the cells 112. The battery module 100 may also include a metal storage box 114 that houses the battery 110 and has a control unit 60 as a main body of the monitoring device 18 attached to a portion of an inner side wall 114b above the cells 112, as shown in FIG.

[0032] (Battery 110) As shown in FIG. 3 , the battery 110 is a lead-acid battery including a plurality of cells 112. The plurality of cells 112 are housed in parallel in a housing box 114. Specifically, the housing box 114 is a rectangular box, and the plurality of cells 112 are arranged in a matrix on the bottom surface of the housing box 114. In the present embodiment, as an example, the plurality of cells 112 are arranged in a matrix of 4 rows and 6 columns on the bottom surface of the housing box 114. Furthermore, of the plurality of cells 112, the cells 112 located on the periphery are in contact with a side wall 114a of the housing box 114 and their postures are supported.

[0033] 3, in the battery 110, the electrodes of adjacent cells 112 are electrically connected to each other by a connecting member 116. In this embodiment, as an example, the plurality of cells 112 are connected in series. However, the present disclosure is not limited to this configuration, and the plurality of cells 112 may be connected in parallel.

[0034] Each of the connection members 116 is covered with an insulating cover 118 .

[0035] Furthermore, the cell 112 of this embodiment has a voltage of, for example, 2 V when fully charged. That is, when a plurality of cells 112 are connected in series, the voltage becomes 48 V when fully charged.

[0036] Of the multiple cells 112, the cell with the largest number of contact surfaces with the storage box 114 is referred to as the first cell 112a, and the cell with the smallest number of contact surfaces with the storage box 114 is referred to as the second cell 112b. In FIG. 3, the second cell 112b is surrounded by a two-dot chain line. In this embodiment, of the multiple cells 112, the cells 112 arranged at the four corners of the storage box 114 in a plan view are the first cells 112a. The first cells 112a contact two surfaces of the side walls 114a and the bottom surface of the storage box 114. In other words, the first cells 112a contact the storage box 114 on three surfaces. Of the multiple cells 112, the cell 112 arranged on the inner side is the second cell 112b. The second cell 112b contacts the bottom surface of the storage box 114 but does not contact the side walls 114a. Therefore, the second cells 112b contact the storage box 114 on one surface. 3, a cell 112 having a number of contact surfaces with the storage box 114 between the first cell 112a and the second cell 112b may be referred to as a third cell 112c. Specifically, the cell 112 arranged along the side wall 114a of the storage box 114 is the third cell 112c. The third cell 112c contacts one surface and the bottom surface of the side wall 114a of the storage box 114. That is, the third cell 112c contacts the storage box 114 on two surfaces.

[0037] 1, the first cell 112a and the second cell 112b are adjacent to each other, but this is for the sake of convenience and differs from the actual cell arrangement. Furthermore, the electrodes of the adjacent first cell 112a and second cell 112b are connected, but this is also for the sake of convenience and differs from the actual electrode connections between the cells 112. The electrode connections between the cells 112 are shown in FIG. 3.

[0038] (Supply pipe 20) As shown in FIGS. 1 and 3, the supply pipe 20 is a pipe that supplies the liquid FL to the battery 110. In the present embodiment, as an example, the liquid FL supplied to the battery 110 is purified water, and the stored liquid RL stored in the cells 112 of the battery 110 is battery fluid. However, the present disclosure is not limited to this configuration. For example, the liquid FL may be water containing more impurities than purified water (tap water, for example), or it may be battery fluid. An example of battery fluid is dilute sulfuric acid (sulfuric acid + water). The specific gravity of dilute sulfuric acid is, for example, 1.1 to 1.3 at a temperature of 20°C. The battery fluid may contain additives such as inorganic salts and organic salts. When the liquid FL is dilute sulfuric acid, it may have the same concentration (specific gravity) as the stored liquid RL, or it may have a different concentration (specific gravity).

[0039] In addition, in this embodiment, the supply pipe 20 is connected, as an example, to a connecting pipe 26 extending from the storage unit 14 that stores the liquid FL. When the supply pipe 20 is connected to the connecting pipe 26, the liquid FL in the storage unit 14 is supplied to the battery 110. The supply pipe 20 and the connecting pipe 26 are connected by a joint mechanism 90. This joint mechanism 90 releasably connects the supply pipe 20 and the connecting pipe 26. Specifically, the joint mechanism 90 includes a male member 92 and a female member 94, and connecting the male member 92 and the female member 94 mechanically connects the male member 92 and the female member 94. When the male member 92 and the female member 94 are connected, water leakage from the connection between the male member 92 and the female member 94 is stopped by a water-stopping member (not shown), such as an O-ring or a packing.

[0040] Furthermore, the storage unit 14 in this embodiment is a container that stores the liquid FL, and is located upstream of the solenoid valve 30 in the supply direction of the liquid FL. In this embodiment, the upstream end of the supply pipe 20 is connected to the downstream end of the connecting pipe 26 by a joint mechanism 90. The upstream end of the connecting pipe 26 is then connected to the storage unit 14. However, the present disclosure is not limited to this configuration, and for example, the upstream end of the connecting pipe 26 may be connected to a water supply.

[0041] Moreover, as an example, the supply pipe 20 of this embodiment branches into multiple pipes along the way to supply the liquid FL to each of the cells 112. Specifically, the supply pipe 20 branches into multiple branch pipes 22 along the way, and the multiple branch pipes 22 that make up the portion downstream of the branched portion in the liquid supply direction supply the liquid FL to each of the cells 112.

[0042] 3, each cell 112 is provided with an on-off valve 40, and the supply pipe 20 is connected to each cell 112 via the on-off valve 40. Specifically, as an example, each on-off valve 40 is connected to the downstream end of each branch pipe 22. Each on-off valve 40 is open when the height of the liquid level LS of the stored liquid RL stored in the corresponding cell 112 (hereinafter referred to as the "liquid level height") is below a predetermined liquid level, and is closed when the height is equal to or higher than the predetermined liquid level. Note that the height of the liquid level LS of the stored liquid RL (liquid level height) here refers to the height from the bottom of the cell 112.

[0043] Moreover, the on-off valve 40 of this embodiment, for example, includes a float 42 that floats on the stored liquid RL, and a valve element 44 that moves in conjunction with the float 42 and contacts a valve seat 45 to close an internal flow path 48 when the liquid level of the stored liquid RL is at the predetermined liquid level. Specifically, as shown in FIG. 4 , the on-off valve 40 includes a housing 46. The interior of the housing 46 forms a part of the supply pipe 20 (branch pipe 22). The housing 46 is provided with a guide hole 47 that guides a shaft member 43 extending from the float 42. This guide hole 47 allows the float 42 to move up and down in accordance with the rise and fall of the liquid level LS. In addition, a valve element 44 is provided on the shaft member 43 on the opposite side from the float 42. Because the float 42 and valve element 44 are provided on the shaft member 43 in this manner, the valve element 44 moves up and down in conjunction with the up and down movement of the float 42. Furthermore, the valve element 44 is pushed up by the shaft 43 to a predetermined height within the housing 46, whereby it contacts the valve seat 45 and closes the internal flow path 48. That is, as the liquid level LS rises, the float 42 rises, and the valve element 44 is pushed up via the shaft 43, closing the internal flow path 48 of the housing 46 and stopping the supply of liquid FL to the cell 112. Here, the height of the liquid level LS at which the valve element 44 contacts the valve seat 45 and closes the internal flow path 48 is the predetermined liquid level (hereinafter referred to as the "water-stopping liquid level") described above. Note that even if the liquid level LS exceeds the water-stopping liquid level, the contact state between the valve element 44 and the valve seat 45 does not change, and therefore the closed state of the internal flow path 48 is maintained. Furthermore, the water-stopping liquid level of the on-off valve 40 may be set for each cell 112.

[0044] 1, in this embodiment, a solenoid valve 30 is provided as an electrically driven valve (i.e., a valve that is electrically driven to open and close) on the tip side of the connecting pipe 26, in other words, on the downstream side in the liquid supply direction. Note that the valve provided on the tip side of the connecting pipe 26 does not have to be the solenoid valve 30 as long as it is an electrically driven valve.

[0045] A liquid measuring unit is provided between the tip of the connecting pipe 26 and the solenoid valve 30. The liquid measuring unit has the function of measuring the pressure and flow rate of the liquid FL. The liquid measuring unit may be composed of, for example, a pressure gauge 31 and a flow meter 32. Specifically, as shown in FIG. 1, the pressure gauge 31 and the flow meter 32 are respectively provided between the tip of the connecting pipe 26 and the solenoid valve 30. The pressure gauge 31 transmits the pressure of the liquid FL flowing through the supply pipe 20 via the connecting pipe 26 to the control unit 60. The flow meter 32 transmits the flow rate of the liquid FL flowing through the supply pipe 20 via the connecting pipe 26 to the control unit 60.

[0046] (Monitoring device 18) 1 and 2, the monitoring device 18 is a device that monitors the state of at least one cell 112. The monitoring device 18 includes a control unit 60 as a main body, a liquid level sensor 50, and a temperature sensor .

[0047] -Liquid level sensor 50- The liquid level sensor 50 has a function of detecting the liquid level LS of the stored liquid RL. The liquid level sensor 50 may be installed in two or more cells 112. In this embodiment, as an example, the liquid level sensor 50 is installed in at least one first cell 112a and at least one second cell 112b. As shown in FIG. 4, the liquid level sensor 50 installed in the first cell 112a will be referred to as the first liquid level sensor 50a below as appropriate. As shown in FIG. 5, the liquid level sensor 50 installed in the second cell 112b will be referred to as the second liquid level sensor 50b below as appropriate. The detection results of each liquid level LS by each liquid level sensor 50 are transmitted to the control unit 60 via the corresponding wiring 52.

[0048] As an example, the liquid level sensor 50 of this embodiment is a sensor that detects the liquid level LS in the cell 112 in which it is installed, by being in a conductive state when the liquid level detection unit 51 is immersed in the stored liquid RL and being in a non-conductive state when the liquid level detection unit 51 is not immersed in the stored liquid RL. The liquid level sensor 50 can adjust the vertical position of the liquid level LS to be detected (liquid level height) by adjusting the vertical position of the liquid level detection unit 51 with respect to the cell 112. For example, by installing multiple liquid level sensors 50 in one cell 112 and varying the vertical positions of the respective liquid level detection units 51, it becomes possible to accurately grasp the vertical position of the liquid level LS with respect to the cell 112.

[0049] In this embodiment, as an example, the position of the liquid level detection unit 51a of the first liquid level sensor 50a is set to a position that is the upper limit for preventing liquid from overflowing from the first cell 112a, as shown in Fig. 4. That is, the liquid level detection unit 51a of the first liquid level sensor 50a is disposed at a position where it can detect the liquid level LS at a liquid level height that is the upper limit for preventing liquid overflow. Hereinafter, the liquid level height that is the upper limit will be referred to as the "upper limit liquid level height" as appropriate.

[0050] In this embodiment, as an example, the position of the liquid level detection unit 51b of the second liquid level sensor 50b is set to a position that is the lower limit for preventing the second cell 112b from running dry, as shown in Fig. 5. In other words, the liquid level detection unit 51b of the second liquid level sensor 50b is disposed at a position where it can detect the liquid level LS at a liquid level that is the lower limit for preventing the second cell 112b from running dry. Hereinafter, the liquid level that is the lower limit will be referred to as the "lower limit liquid level" as appropriate.

[0051] Here, the first cell 112a, which has the largest number of contact surfaces with the metal storage box 114, dissipates heat easily through the storage box. On the other hand, the second cell 112b, which has the smallest number of contact surfaces with the storage box 114, is not in contact with the storage box 114 compared to the first cell 112a, and therefore dissipates less heat through the storage box 114. For this reason, the second cell 112b is more likely to become hot and the stored liquid RL decreases more quickly than the first cell 112a. In this way, in the second cell 112b, which decreases the stored liquid RL most quickly, the liquid level detection unit 51b of the second liquid level sensor 50b is positioned at a lower limit position that prevents the second cell 112b from running out. When the liquid level detection unit 51b detects the liquid level, it becomes possible to determine that a predetermined amount of stored liquid RL has been secured even in cells 112 where the second liquid level sensor 50b is not installed. Furthermore, in the first cell 112a where the stored liquid RL decreases the slowest, in other words where the stored liquid RL remains the most and is most likely to overflow, by positioning the liquid level detection unit 51a of the first liquid level sensor 50a at a position that is the upper limit for preventing the liquid from overflowing in the first cell 112a, when the liquid level detection unit 51a detects the liquid level, it becomes possible to know that the liquid is about to overflow.

[0052] -Temperature Sensor 54- The temperature sensor 54 has a function of detecting the temperature of the cell 112. As shown in Fig. 3, the temperature sensor 54 may be inserted into a gap between adjacent cells 112. Alternatively, the temperature sensor 54 may be inserted into a gap between the sidewall inner surface 114b and the cell 112.

[0053] Furthermore, the temperature sensor 54 may be inserted into the gap between the second cell 112b, which has the fewest number of contact surfaces with the container 114, and the cell 112 adjacent to the second cell 112b, among the multiple cells 112. The adjacent cell 112 may be the third cell 112c, but is preferably the second cell 112b. In this manner, when the adjacent cell 112 is the second cell 112b, the temperature sensor 54 is inserted into the gap between the adjacent second cells 112b. In other words, the temperature sensor 54 can detect the temperature of the adjacent second cells 112b, which radiate less heat through the container 114.

[0054] In the present embodiment, as an example, the temperature sensor 54 is inserted into the gaps between the opposing corners of the four second cells 112b arranged in a matrix, as shown in Fig. 3. More specifically, the temperature sensor 54 is inserted into the gaps between the opposing corners of the four second cells 112b arranged in a matrix, at a position that is the center of the battery 110.

[0055] The corners of each cell 112 may be chamfered or curved in a convex arc shape in plan view. In the present embodiment, as an example, the corners of each cell 112 are curved in a convex arc shape in plan view. When the corners of the cells 112 are chamfered or curved in a convex arc shape in plan view in this way, it becomes easier to insert the temperature sensor 54 into the gaps between the opposing corners of the four second cells 112b.

[0056] The detection result detected by the temperature sensor 54 is transmitted to the control unit 60 via a wire 55 .

[0057] -Control unit 60- The control unit 60 includes, for example, a CPU (Central Processing Unit: processor) 61, a ROM (Read Only Memory) 62, a RAM (Random Access Memory) 63, and a storage 64, as shown in FIG.

[0058] The CPU 61 is a central processing unit that executes various programs and controls various components. That is, the CPU 61 reads programs from the ROM 62 or storage 64 and executes the programs using the RAM 63 as a work area. The CPU 61 controls the solenoid valve 30 (described later) and performs various arithmetic processing in accordance with the programs recorded in the ROM 62 or storage 64. Note that, if a liquid supply pump is used to supply the liquid FL from the reservoir 14, the CPU 61 controls the liquid supply pump in the same manner as the solenoid valve 30.

[0059] The ROM 62 stores various programs and various data. The RAM 63 temporarily stores programs or data as a working area. The storage 64 is configured with an HDD (Hard Disk Drive) or SSD (Solid State Drive) and stores various programs including the operating system and various data.

[0060] The control unit 60 has a function of controlling the driving (opening and closing) of the solenoid valve 30. As an example, the control unit 60 of this embodiment may determine the amount of liquid FL to be supplied (also referred to as the replenishment amount) to the battery 110 based on the charge and discharge history of the battery 110, and keep the solenoid valve 30 open until the determined amount of liquid FL is supplied to the battery 110. The charge and discharge history of the battery 110 is stored in the storage 64. When supplying liquid FL to the battery 110, the control unit 60 reads the charge and discharge history of the battery 110 from the storage 64 and determines the amount of liquid loss from the read charge and discharge history. The control unit 60 then sets the determined amount of liquid loss as the amount of liquid FL to be supplied, and controls the solenoid valve 30 to remain open until the determined amount of liquid FL is supplied to the battery 110. Note that, because the amount of remaining liquid before liquid supply differs for each cell 112, when liquid FL is supplied to each cell 112 via each branch pipe 22, the liquid level of the stored liquid RL may exceed the water-stop liquid level before the supply amount calculated above is fully supplied. In this case, the on-off valve 40 installed in the cell 112 where the liquid level of the stored liquid RL has exceeded the water-stop liquid level becomes closed, and the supply of liquid FL to the target cell 112 is stopped. Then, liquid FL continues to be supplied to the other cells 112 except for the cell 112 whose on-off valve 40 has become closed.

[0061] In this embodiment, as an example, the liquid FL is purified water and the stored liquid RL is battery fluid. When the battery fluid is reduced in volume, the water (purified water component) in the battery fluid evaporates. Therefore, the battery fluid is replenished by supplying purified water, which is the liquid FL, to the battery fluid.

[0062] Furthermore, as an example, the control unit 60 of this embodiment changes the solenoid valve 30 from an open state to a closed state when the liquid level detected by the liquid level sensor 50 is the upper limit liquid level. Specifically, when the liquid level detection unit 51a of the first liquid level sensor 50a detects the liquid level LS of the stored liquid RL stored in the first cell 112a and receives the detection signal, the control unit 60 controls the drive of the solenoid valve 30 so that the solenoid valve 30 changes from an open state to a closed state in order to prevent liquid from overflowing from the first cell 112a.

[0063] Furthermore, as an example, the control unit 60 of this embodiment maintains the open state of the solenoid valve 30 when the liquid level detected by the liquid level sensor 50 is the lower limit liquid level. Specifically, the liquid level detection unit 51b of the second liquid level sensor 50b detects the liquid level LS of the stored liquid RL stored in the second cell 112b, and until the control unit 60 receives the detection signal, the control unit 60 controls the drive of the solenoid valve 30 so that the solenoid valve 30 can maintain the open state in order to prevent the second cell 112b from running dry.

[0064] The control unit 60 also includes a case 66. The case 66 houses electronic components (for example, a CPU 61, a ROM 62, a RAM 63, and a storage 64) that constitute the control unit 60. Specifically, the case 66 houses a board on which the electronic components are mounted. The case 66 is attached to the sidewall inner surface 114b above the cells 112. Specifically, the case 66 is preferably attached to the sidewall inner surface 114b above the connection portion 24 between the supply pipe 20 (branch pipe 22) and the on-off valve 40. The case 66 may be attached to the sidewall inner surface 114b by adhesion, by fastening with screws, or by other methods.

[0065] The monitoring device 18 also includes a display unit 68 that displays the detection results detected by the liquid level sensor 50. This display unit 68 is connected to the control unit 60 via wiring 69. Note that, although the display unit 68 of this embodiment is a display device that notifies the detection of the liquid level by the liquid level sensor 50 by turning on a light source or the like, the present disclosure is not limited to this configuration. For example, a display that can display characters or the like may also be used.

[0066] (Binding member 88) The bundling member 88 is a member that fixes the wiring 80 to the cell 112. Specifically, the bundling member 88 fixes the wiring 80 to the insulating cover 118. This bundling member 88 is a strip-shaped member (a so-called cable tie), and as shown in FIG. 7 , fixes the wiring 80 to the cell 112 via the insulating cover 118 by bundling the insulating cover 118 and the wiring 80. Furthermore, in this embodiment, the bundling member 88 may fix the wiring 80 to the insulating cover 118 while bundling a plurality of wires 80 together.

[0067] The wiring 80 includes the wiring 52 for the liquid level sensor 50 and the wiring 55 for the temperature sensor 54. In addition to the above, the wiring 80 also includes wiring that connects the control unit 60 to the electronic devices. That is, the wiring 80 also includes wiring 69 that connects the control unit 60 to the display unit 68. The wiring 80 may also include wiring for measuring the voltage and current of the battery 110.

[0068] The battery module 100 also includes a charging cable 70, as shown in FIGS. 1 and 3. The charging cable 70 is connected to each electrode of the battery 110. As shown in FIG. 1, the battery 110 is charged by connecting the charging cable 70 to a charger 16. In this embodiment, as an example, the charging cable 70 includes a joint mechanism 72. The joint mechanism 72 includes a male member 74 and a female member 76. Electricity flows through the charging cable 70 by connecting the male member 74 and the female member 76. When the joint mechanism 90 and the joint mechanism 72 are detached, the battery module 100 can be removed. By attaching such a battery module 100 to a mobile object (e.g., a mobile object powered by electricity), the mobile object can be operated. On the other hand, by removing the battery module 100 from the mobile object and attaching a replacement battery module 100 to the mobile object, the mobile object can be operated continuously. The removed battery module 100 is supplied with liquid and charged.

[0069] In this embodiment, the refilling device 12 is made up of the connecting pipe 26, the solenoid valve 30, the liquid measuring unit, and the charger 16. The refilling device 12 may include a reservoir 14.

[0070] The battery maintenance system 10 of this embodiment is configured to include a battery module 100 and a replenishing device 12.

[0071] Next, an example of a method for attaching components to the battery 110 of the present disclosure will be described.

[0072] In the method for installing components in a battery 110 of this embodiment, a battery 110 having a plurality of cells 112 is prepared, wiring 80 of a monitoring device 18 that monitors the state of the cells 112 is placed on the plurality of cells 112, the wiring 80 is fixed to the cells 112 using a binding member 88, and after the wiring 80 is fixed to the cells 112, a supply pipe 20 that can supply liquid FL to each cell 112 is placed on the plurality of cells 112.

[0073] Specifically, first, a battery 110 in which a plurality of cells 112 are housed in a housing box 114 is prepared.

[0074] Next, the liquid level sensor 50 is attached to the second cell 112b. The temperature sensor 54 is inserted between the opposing corners of the four second cells 112b. The case 66 and display unit 68 of the control unit 60 are attached to the inner side wall surface 114b of the container box 114. Then, the wiring 80 (wiring 52, wiring 55, wiring 69) is connected on the multiple cells 112.

[0075] Next, each wire 80 is bound to the insulating cover 118 using a binding member 88, thereby fixing each wire 80 to the cell 112 via the insulating cover 118.

[0076] Next, after each wire 80 is fixed to the cell 112, the supply pipe 20 is placed on the plurality of cells 112. Then, each branch pipe 22 of the supply pipe 20 is connected to the on-off valve 40 of each cell 112, respectively.

[0077] Next, the charging cable 70 is connected to the electrodes of the battery 110, respectively, thereby completing the attachment of parts to the battery 110 and completing the battery module 100.

[0078] Here, in the above-described method for attaching components to a battery 110, the supply pipe 20 is installed after each wire 80 is fixed to the cell 112 with the bundling member 88. This prevents the supply pipe 20, the wire 80, and the insulating cover 118 from being accidentally bound together and fixed to the cell 112 during work. If the supply pipe 20 were bound to another component with the bundling member 88, there is a concern that the supply pipe 20 would be crushed and deformed, resulting in a decrease in flow rate. If the flow rate were to decrease, it would take longer to complete the supply of liquid during maintenance to supply liquid to the battery 110, which could reduce maintainability. However, in the method for attaching components to a battery 110, the supply pipe 20 is installed after each wire 80 is fixed to the cell 112 with the bundling member 88, which prevents a decrease in maintainability.

[0079] Next, the effects of this embodiment will be described. In the battery module 100 of the present embodiment, for example, even if vibration or the like is applied to the battery 110, the wiring 80 of the monitoring device 18 is fixed to the cell 112 by the binding member 88, thereby suppressing friction between the wiring 80 and the cell 112. As a result, in the battery module 100 described above, malfunctions are less likely to occur in the wiring 80 compared to a configuration in which the wiring 80 is movable relative to the cell 112, and deterioration in maintainability of the battery 110 can be suppressed.

[0080] Furthermore, in the battery module 100, since the supply pipe 20 is arranged above the wiring 80, it is easier to connect the supply pipe 20 to the connecting pipe 26 extending from the reservoir 14 as a liquid supply means, for example, during maintenance to supply liquid to each cell 112, compared to a configuration in which the supply pipe 20 is arranged below the wiring 80. This makes it possible to suppress a decrease in the ease of maintenance of the battery 110.

[0081] Furthermore, in the battery module 100 of this embodiment, the wiring 80 is fixed to the insulating cover 118 that covers the connection member 116 with a binding member 88, so the structure of the cell 112 can be simplified compared to a configuration in which a dedicated portion is provided in the cell 112 for fixing the wiring 80 with the binding member 88.

[0082] Furthermore, in the battery module 100 of this embodiment, the insulating cover 118 and the wiring 80 are bound together with a strip-shaped binding member 88, thereby fixing the wiring 80 to the cell 112 via the insulating cover 118. In this way, in the battery module 100, the wiring 80 can be fixed to the cell 112 by binding the insulating cover 118 and the wiring 80 with the binding member 88, compared to, for example, a case in which the binding member 88 and the wiring 80, and the binding member 88 and the insulating cover 118 are separately fixed, and therefore the burden of the wiring work can be reduced.

[0083] Furthermore, in the battery module 100 of this embodiment, multiple wirings 80 are bundled together using a bundling member 88 and fixed to the cell 112, which reduces the burden of wiring work compared to, for example, a configuration in which each wiring 80 is fixed to the cell 112 separately.

[0084] Furthermore, in the battery module 100 of this embodiment, the wiring 52 of the liquid level sensor 50 is fixed to the cell 112 with the bundling member 88, which makes it less likely that a malfunction will occur in the wiring 52 of the liquid level sensor 50. In the battery module 100 described above, the liquid level LS is detected by the liquid level sensor 50 to monitor the state of the cell 112, and therefore, since the wiring 52 of the liquid level sensor 50 is less likely to malfunction, it becomes possible to stably monitor the state of the cell 112.

[0085] Furthermore, in the battery module 100 of this embodiment, the detection result detected by the liquid level sensor 50 is displayed on the display unit 68, so that the user can visually check the position of the liquid level LS of the battery 110 (liquid level height).

[0086] Furthermore, in the battery module 100 of this embodiment, the wiring 55 of the temperature sensor 54 is fixed to the cell 112 with the binding member 88, which makes it less likely that a malfunction will occur in the wiring 55 of the temperature sensor 54. In the battery module 100 described above, the temperature sensor 54 detects the temperature of the cell 112 to monitor the state of the cell 112, and therefore, since the wiring of the temperature sensor 54 is less likely to malfunction, it becomes possible to stably monitor the state of the cell 112.

[0087] Furthermore, in the battery module 100 of this embodiment, even if the liquid FL supplied from the supply pipe 20 to each cell 112 overflows onto the cell 112, the control unit 60 of the monitoring device 18 is attached to a portion of the inner side wall 114b of the storage box 114 above the cell 112, and therefore the control unit 60 is prevented from getting wet with the liquid compared to a configuration in which the control unit 60 is disposed on the upper surface of the cell 112. In this way, in the battery module 100, the control unit 60 is prevented from getting wet with the liquid, and therefore malfunctions are less likely to occur in the control unit 60 (electronic components that make up the control unit 60), and deterioration in maintainability of the battery 110 can be prevented.

[0088] Furthermore, in the battery module 100 of this embodiment, even if leakage occurs from the connection 24 between the supply pipe 20 and the on-off valve 40, the control unit 60 of the monitoring device 18 is attached to the inner side wall 114b of the storage box 114 above the connection 24, and therefore the control unit 60 is less likely to be exposed to the liquid compared to a configuration in which the control unit 60 is attached at the same height as the connection 24 or below the connection 24. Thus, in the battery module 100 described above, even if leakage occurs from the connection 24 between the supply pipe 20 and the on-off valve 40, the control unit 60 of the monitoring device 18 is less likely to malfunction due to exposure to the liquid, and deterioration in maintainability of the battery 110 can be further suppressed.

[0089] Furthermore, in the battery module 100 of this embodiment, the temperature of the cells 112 is detected by the temperature sensor 54 inserted into the gap between adjacent cells 112, and the detected temperature is transmitted to the control unit 60 of the monitoring device 18. Here, in the battery module 100, the temperature sensor 54 is inserted into the gap between adjacent cells 112 to detect the temperature of the cells 112, which simplifies the work of installing the temperature sensor 54 in the battery 110 compared to a configuration in which the temperature sensor 54 is inserted into the cell 112 to detect the liquid temperature in the cell 112. Furthermore, in the battery module 100, the temperature of the cell 112 can be stably detected regardless of the position of the liquid level LS in the cell 112, thereby improving the maintainability of the battery 110. In the battery module 100, the temperature sensor 54 detects the temperature of the second cell 112b, which has the fewest number of contact surfaces with the storage box 114, i.e., the second cell 112b, which is less susceptible to heat dissipation through the storage box (it is more likely to become hot and dry up), so it is easy to grasp the state (temperature state) of the cell 112 that becomes hot.

[0090] In addition, in the battery module 100 of this embodiment, the liquid level sensor 50 detects the liquid level LS in the cell 112 and transmits it to the control unit 60 of the monitoring device 18, making it easy to grasp the state of the cell 112 (liquid amount in the cell).

[0091] In addition, in the battery module 100 of this embodiment, the liquid level sensor 50 detects the liquid level LS of the second cell 112b, which has the fewest number of contact surfaces with the storage box 114, making it easy to grasp the state (liquid amount) of the cell 112 that becomes hot.

[0092] Furthermore, in the battery module 100 of this embodiment, the temperature of the cell 112 may be detected by a temperature sensor 54 inserted into the gap between the inner side wall 114b of the storage box 114 and the cell 112, and the temperature may be transmitted to the control unit 60 of the monitoring device 18. Even in this case, the work of installing the temperature sensor 54 in the battery 110 is simplified compared to a configuration in which the temperature sensor 54 is inserted into the cell 112 to detect the liquid temperature in the cell 112. Furthermore, the temperature of the cell 112 can be detected stably regardless of the position of the liquid level LS in the cell 112, thereby improving the maintainability of the battery 110.

[0093] In the system 10 of this embodiment, by opening both the solenoid valve 30 and the on-off valve 40, the liquid FL is supplied to the battery 110 through the supply pipe 20. Here, in the system 10, even if a malfunction occurs in the on-off valve 40 while the liquid is being supplied to the battery 110, the supply of the liquid to the battery 110 can be stopped by closing the solenoid valve 30, which is located upstream of the on-off valve 40 in the liquid supply direction. This makes it possible to prevent an excessive supply of the liquid to the battery 110. By preventing an excessive supply of the liquid to the battery 110 in this way, an increase in the frequency of maintenance of the battery 110 due to liquid overflow is prevented, and the maintainability of the battery 110 is improved.

[0094] In particular, in the system 10 of this embodiment, the supply pipe 20 branches into multiple branch pipes 22, which causes differences in the amount of liquid supplied to each cell 112 depending on the distance of each branch pipe 22, but because each of the multiple branch pipes 22 is provided with an on-off valve 40, if the supply of liquid to any of the cells 112 becomes excessive, the on-off valve 40 corresponding to the excess cell 112 can be closed to stop the supply of liquid to the cell 112. In this way, the system 10 can prevent excessive supply of liquid to each cell 112 that constitutes the battery 110, compared to when the on-off valve 40 is provided upstream of the branch portion of the supply pipe 20 in the liquid supply direction.

[0095] Furthermore, in the system 10 of this embodiment, the control unit 60 controls the driving (opening and closing) of the solenoid valve 30. Therefore, in the system 10, the burden on the worker can be reduced compared to when the worker manually drives the solenoid valve 30.

[0096] Furthermore, in the system 10 of this embodiment, the control unit 60 determines the amount of liquid FL to be supplied to the battery 110 based on the charge / discharge history of the battery 110. Then, the control unit 60 keeps the solenoid valve 30 open until the determined supply amount is supplied to the battery 110. Therefore, in the system 10, it is possible to efficiently supply the battery 110 with the liquid FL that is insufficient, compared to a case in which a constant amount of liquid FL is always supplied to the battery 110 regardless of the charge / discharge history of the battery 110.

[0097] Furthermore, in the system 10 of this embodiment, when liquid is supplied to the battery 110, the on-off valve 40 remains open until the liquid level of the stored liquid RL stored in at least one cell 112 reaches the water-stopping liquid level. When the liquid level reaches or exceeds the water-stopping liquid level, the on-off valve 40 closes, and the supply of liquid to the battery 110 is stopped. Specifically, when liquid is supplied to the battery 110, if the liquid level in each cell 112 is below the water-stopping liquid level, the on-off valve 40 corresponding to each cell 112 remains open. When the liquid level in each cell 112 reaches or exceeds the water-stopping liquid level, the on-off valve 40 corresponding to each cell 112 remains closed, and the supply of liquid to each cell 112 is stopped. Here, in the system 10, if the water-stopping liquid level is set to a level that can prevent excessive supply of liquid FL to the battery 110, it is possible to further prevent an increase in the frequency of maintenance due to liquid overflow.

[0098] 4, in the system 10 of this embodiment, when the height of the liquid level LS detected by the liquid level detection unit 51a of the first liquid level sensor 50a installed in the first cell 112a where the decrease in the stored liquid RL is slow is equal to or higher than the upper limit liquid level, the control unit 60 closes the solenoid valve 30. This makes it possible to effectively prevent liquid from overflowing due to an excessive supply of liquid to the battery 110 (for example, liquid overflowing from the first cell 112a).

[0099] 5, in the system 10 of this embodiment, when the height of the liquid level LS detected by the second liquid level sensor 50b installed in the second cell 112b, in which the stored liquid RL decreases quickly, is below the lower limit liquid level, the control unit 60 opens the solenoid valve 30. This makes it possible to prevent the second cell 112b from running dry.

[0100] Furthermore, in the system 10 of this embodiment, the valve element 44, which moves in conjunction with the float 42, comes into contact with the valve seat 45 and closes the internal flow path 48 when the liquid level is equal to or higher than the water-stop liquid level. In this way, compared to when an electrically driven valve element 44 is used as the on-off valve 40, it is possible to suppress increases in costs related to controlling the on-off valve 40.

[0101] Furthermore, the system 10 of this embodiment may charge and supply liquid to the battery 110 by, for example, a user performing an operation to execute a maintenance mode set in the control unit 60. Here, the maintenance mode may include a mode in which both charging and supplying liquid to the battery 110 are performed, and a mode in which only one of these is performed. Furthermore, the control unit 60 monitors whether, for example, a predetermined time has elapsed since the previous maintenance, the voltage of the battery 110 has fallen below a predetermined voltage, or the liquid level in the second cell 112b has fallen below a lower limit liquid level, and when any one or a combination of these conditions is met, the system 10 may automatically execute the maintenance mode or may notify the user that the conditions have been met (including by notification via the Internet, etc.).

[0102] (Other embodiments) In the battery 110 of the above-described embodiment, the cells 112 are arranged in a matrix of 4 rows and 6 columns, as an example. However, the present disclosure is not limited to this. For example, the cells 112 of the battery 110 may be arranged in a matrix of 2 rows and 6 columns. In this case, as in the above-described embodiment, the cell with the most contact surfaces with the housing is referred to as the first cell 112a, and the cell with the fewest contact surfaces with the housing is referred to as the second cell 112b. A first liquid level sensor 50a is installed in at least one of the first cells 112a, and a second liquid level sensor 50b is installed in at least one of the second cells 112b. Furthermore, a temperature sensor 54 is inserted in the gap between adjacent cells 112. This achieves the same effects as the above-described embodiment. The matrix arrangement of the multiple cells 112 in n rows and m columns (n ​​and m are positive integers) can be set depending on the device to which it is applied. The multiple cells 112 do not have to be arranged in an orderly manner.

[0103] In the above-described embodiment, a liquid level sensor is used to detect the liquid level by immersing the liquid level detection unit in the liquid. However, the present disclosure is not limited to this configuration. For example, a non-contact liquid level sensor may be used to detect the up and down movement of the liquid level in detail. In this case, a non-contact liquid level sensor may be provided in all cells 112, or a liquid level sensor may be provided in at least one of the first cells 112a and at least one of the second cells 112b.

[0104] In the above-described embodiment, the cells in which the first liquid level sensor 50a and the second liquid level sensor 50b are installed are specified, but the present disclosure is not limited to this configuration. For example, the first liquid level sensor 50a and the second liquid level sensor 50b may be installed in all the cells 112.

[0105] In the above-described embodiment, the detection result by the liquid level sensor 50 is transmitted to the display unit 68 via the control unit 60 as shown in Fig. 7, but the present disclosure is not limited to this configuration. For example, as shown in Fig. 8, the detection result by the liquid level sensor 50 may be transmitted directly to the display unit 68. Furthermore, in a configuration in which the detection result by the liquid level sensor 50 is transmitted directly to the display unit 68, the monitoring device 18 may be a battery management unit, and the control unit 60 may be a control unit for the battery management unit.

[0106] Furthermore, in the above-described embodiment, the control unit 60 controls the opening and closing operation of the solenoid valve 30, but the present disclosure is not limited to this configuration, and for example, instead of the solenoid valve 30, an opening and closing valve that is manually opened and closed may be provided in the connecting pipe 26. In this case, the control unit 60 may function as a control unit of the battery management unit.

[0107] In the above-described embodiment, the supply pipe 20 of the battery module 100 is detachable from the storage unit 14, and the charging cable 70 is also detachable from the charger 16; however, the present disclosure is not limited to this configuration. As shown in Fig. 10 , the supply pipe 20 and the connecting pipe 26 of the battery module 100 may be configured to be undetachable, and the charging cable 70 may also be undetachable from the charger 16.

[0108] The above describes an embodiment of the present disclosure with reference to the accompanying drawings. However, it is clear that a person with ordinary knowledge in the field of technology to which the present disclosure pertains can conceive of various modifications or applications within the scope of the technical ideas set forth in the claims, and it is understood that these also naturally fall within the technical scope of the present disclosure. [Explanation of symbols]

[0109] 10 Battery Maintenance System 12 Replenishment device 14 Reservoir 16 charger 18 Monitoring equipment 20 Supply pipe 22 Branch pipe 26 Connecting pipe 30 Solenoid valve 31 Pressure gauge 32 Flow meter 40 On-off valve 42 Float 43 Shaft material 44 Valve body 45 Valve seat 46 Case 47 Guide hole 48 Internal flow path 50 Liquid level sensor 51 Liquid level detection section 52 Wiring 54 Temperature Sensor 55 Wiring 60 Control Unit 66 cases 68 Display section 69 Wiring 70 Charging Cable 72 Joint mechanism 74 Male member 76 Female member 80 Wiring 88 Binding member (an example of a fixing member) 90 Joint mechanism 92 Male member 94 Female member 100 Battery module (an example of a battery module) 110 Battery (example of a battery pack) 112 cells 112a First Cell 112b Second Cell 114 Storage Box 114a side wall 114b Inside side wall 116 Connecting member 118 Insulating cover RL Retention Fluid FL liquid LS liquid level SD liquid supply direction

Claims

1. a battery pack including a plurality of cells; a monitoring device for monitoring the status of at least one of said cells; a fixing member for fixing wiring of the monitoring device disposed on the plurality of cells to the cells; a supply pipe arranged above the wiring and capable of supplying liquid to each of the cells; A battery module comprising:

2. a connecting member that electrically connects the electrodes of the adjacent cells; an insulating cover that covers the connection member; Equipped with The fixing member fixes the wiring to the insulating cover. The battery module according to claim 1 .

3. the fixing member is a band-shaped binding member, The bundling member fixes the wiring to the cell via the insulating cover by bundling the insulating cover and the wiring. The battery module according to claim 2 .

4. The bundling member bundles the plurality of wires. The battery module according to claim 3 .

5. the monitoring device includes a liquid level sensor that detects the liquid level in the cell; The wiring of the liquid level sensor is fixed to the cell by the fixing member. The battery module according to claim 1 .

6. The monitoring device includes a display unit that displays the detection result detected by the liquid level sensor. The battery module according to claim 5 .

7. the monitoring device includes a temperature sensor for detecting a temperature of the cell; The wiring of the temperature sensor is fixed to the cell by the fixing member. The battery module according to claim 1 .

8. preparing a battery pack including a plurality of cells; Wiring for a monitoring device for monitoring the state of the cells is arranged on a plurality of the cells; Fixing the wiring to the cell using a fixing member; After the wiring is fixed to the cells, supply pipes capable of supplying liquid to each of the cells are arranged on the plurality of cells. How to install battery components.

9. The wiring is fixed to the cell via the insulating cover by using the fixing member to fix the wiring to an insulating cover that covers a connection member that electrically connects the electrodes of the adjacent cells. The method for mounting components to a battery pack according to claim 8.

10. the fixing member is a band-shaped binding member, The insulating cover and the wiring are bound together using the binding member, thereby fixing the wiring to the cell via the insulating cover. The method for mounting components to a battery pack according to claim 9.

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