Mobile

Abstract

To provide a moving body that can suppress deterioration in mounting density of a battery in a battery case.SOLUTION: A moving body 1 comprises: first battery modules 2A and second battery modules 2B in which a plurality of battery cells 21 are laminated in a first direction; a battery case 3 housing the battery modules 2A and 2B; a charger 4 that charges the battery modules 2A and 2B; loads 6A and 6B; and a battery control device 7 that controls the battery modules 2A and 2B. The first battery modules 2A and the second battery modules 2B are arranged in parallel in the first direction and are electrically connected in parallel to the loads 6A and 6B and the charger 4. The battery control device 7, when either of the battery modules 2A and 2B are charged, prohibits the other of the battery modules 2B and 2A from being charged.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a moving body. [Background technology]

[0002] In recent years, efforts to realize a low-carbon or carbon-free society have been gaining momentum as a concrete measure against global climate change. There is also a strong demand for reducing CO2 emissions from moving objects such as vehicles, and the electrification of drive sources is rapidly progressing. Specifically, development is underway for vehicles such as electric vehicles or hybrid electric vehicles that are equipped with an electric motor as a drive source for the vehicle and a battery as a secondary battery capable of supplying power to the electric motor.

[0003] In order to increase the driving range of such vehicles, battery packs are becoming larger (for example, Patent Document 1), and attempts are being made to mount as many battery cells and / or battery modules as possible inside the case in order to increase the battery mounting density inside the case. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-193026 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the volume of a battery cell expands and contracts depending on the charge capacity. Therefore, the battery module expands when the battery is charged, and contracts when the battery is discharged. This tendency is particularly noticeable in all-solid-state batteries that use solid electrolytes.

[0006] Therefore, when placing the battery module inside the case in the initial state, it is necessary to ensure that there is a sufficient distance between the battery module and the case wall, which may result in a reduction in the mounting density of the battery cells and / or battery modules in the battery case.

[0007] The present invention provides a moving body capable of suppressing a decrease in battery mounting density inside a battery case. [Means for solving the problem]

[0008] The present invention relates to a first battery module and a second battery module each including a plurality of battery cells stacked in a first direction; a battery case that houses the first battery module and the second battery module; a charger that charges the first battery module and the second battery module; Load and A mobile object comprising: a battery control device that controls the first battery module and the second battery module, The first battery module and the second battery module are arranged side by side in the first direction, the first battery module and the second battery module are electrically connected in parallel to the load and the charger; The battery control device includes: When one of the first battery module and the second battery module is charged, charging of the other of the first battery module and the second battery module is prohibited.

[0009] The present invention also provides a method for producing a semiconductor device comprising the steps of: a battery case that houses a plurality of battery cells stacked in a first direction; a charger for charging the plurality of battery cells; Load and A mobile object comprising: a battery control device that controls the plurality of battery cells, the plurality of battery cells include a first battery cell group arranged in a first region adjacent to each other in the first direction and a second battery cell group arranged in a second region; the first battery cell group and the second battery cell group are electrically connected in parallel to the load and the charger; The battery control device includes: When one of the first battery cell group and the second battery cell group is charged, charging of the other of the first battery cell group and the second battery cell group is prohibited.

[0010] The present invention also provides a method for producing a method for manufacturing a semiconductor device comprising the steps of: At least three battery modules, each of which has a plurality of battery cells stacked in a first direction; a battery case housing the at least three battery modules; a charger for charging the at least three battery modules; Load and A mobile object comprising: a battery control device that controls the at least three battery modules; The at least three battery modules are arranged side by side in the first direction, the at least three battery modules are electrically connected in parallel to the load and the charger; The battery control device includes: When at least one of the at least three battery modules is charged, at least one of the remaining battery modules is discharged. Effect of the Invention

[0011] According to the present invention, a decrease in battery mounting density within a battery case can be suppressed. [Brief description of the drawings]

[0012] [Figure 1] 1 is a block circuit diagram showing a schematic configuration of a moving object 1 according to an embodiment of the present invention. [Diagram 2] 1 is an explanatory diagram showing a state in which a first battery module 2A is being charged by a charger 4. FIG. [Diagram 3] 1 is an explanatory diagram showing a state in which a first battery module 2A is being charged by a charger 4 while a second battery module 2B is being discharged to a second load 6B. FIG. [Figure 4] FIG. 11 is an explanatory diagram showing a state in which a first battery module 2A is being charged by a rapid charger while a second battery module 2B is being discharged to a second load 6B. [Diagram 5] FIG. 11 is an explanatory diagram showing a state in which a first battery module 2A is discharging to a first load 6A while a second battery module 2B is being charged by the first battery module 2A. [Figure 6] 11 is an explanatory diagram showing a state in which a first battery module 2A and a second battery module 2B are discharging to a second load 6B when a collision of a moving object 1 is detected or predicted. FIG. [Figure 7] 4 is an explanatory diagram illustrating a schematic relationship between the charge capacities of a first battery module 2A and a second battery module 2B and the clearance within a battery case 3. FIG. [Figure 8] 1 is a block circuit diagram showing a schematic configuration of a moving object 1 of a first modified example. [Figure 9] 9 is a schematic front view showing the configuration inside the battery case 3 of the moving object 1 of FIG. 8. FIG. [Figure 10] FIG. 11 is a block circuit diagram showing a schematic configuration of a moving object 1 according to a second modified example. [Figure 11] 4 is an explanatory diagram illustrating clearances between a battery case 3 and battery modules 2A and 2B. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, a moving body according to one embodiment of the present invention will be described with reference to FIGS.

[0014] A moving object 1 according to one embodiment of the present invention is, for example, an electric vehicle that runs on the power of a motor, and includes a battery module group 2, a battery case 3, a charger 4, a normal charging terminal 5A, a quick charging terminal 5B, a first load 6A, a second load 6B, and a battery control device (CTR) 7, as shown in Fig. 1. The battery module group 2 according to this embodiment includes a plurality of first battery modules 2A (three in this embodiment) electrically connected in series, and a plurality of second battery modules 2B (three in this embodiment) electrically connected in series.

[0015] The battery case 3 houses the battery module group 2, i.e., in this embodiment, three first battery modules 2A and three second battery modules 2B. The number of the first battery modules 2A and the second battery modules 2B may be one or two, or may be four or more.

[0016] The first battery module 2A and the second battery module 2B are each configured by stacking a plurality of battery cells 21 in a first direction. The first battery module 2A and the second battery module 2B are arranged in a line in the first direction, and are configured such that the length in the first direction increases due to expansion of the battery cells 21 and decreases due to contraction of the battery cells 21. In other words, the first battery module 2A and the second battery module 2B are arranged such that the stacking directions of the plurality of battery cells 21 are the same and are aligned in the stacking direction.

[0017] Furthermore, the first battery module 2A and the second battery module 2B are electrically connected in parallel to the first load 6A, the second load 6B, the charger 4, and the rapid charging terminal 5B.

[0018] To specifically explain the electrical connection configuration, the first battery module 2A is connected to the first load 6A via a connection path CA1, connected to the second load 6B via a connection path CA2, connected to the charger 4 via a connection path CA3 through which the first switch SW1 is interposed, and connected to the quick charging terminal 5B via a connection path CA4 through which the third switch SW3 is interposed. The second battery module 2B is connected to the first load 6A via a connection path CB1, connected to the second load 6B via a connection path CB2, connected to the charger 4 via a connection path CB3 through which the second switch SW2 is interposed, and connected to the quick charging terminal 5B via a connection path CB4 through which the fourth switch SW4 is interposed. Furthermore, the battery modules 2A and 2B are connected to each other via a connection path C5.

[0019] The first battery module 2A and the second battery module 2B of this embodiment are configured using, for example, an all-solid-state battery. Although not shown, the all-solid-state battery has a positive electrode for the all-solid-state battery, a negative electrode for the all-solid-state battery, and a solid electrolyte arranged between the positive electrode for the all-solid-state battery and the negative electrode for the all-solid-state battery, and the all-solid-state battery is charged and discharged by the transfer of lithium ions between the positive electrode for the all-solid-state battery and the negative electrode for the all-solid-state battery via the solid electrolyte. There is no particular limit to the solid electrolyte as long as it has lithium ion conductivity and insulation properties, and materials generally used in all-solid-state lithium ion batteries can be used. For example, inorganic solid electrolytes such as sulfide solid electrolyte materials, oxide solid electrolyte materials, and lithium-containing salts, polymer-based solid electrolytes such as polyethylene oxide, and gel-based solid electrolytes containing lithium-containing salts and lithium ion-conductive ionic liquids can be mentioned. There is no particular limit to the form of the solid electrolyte material, but for example, a particulate form can be mentioned.

[0020] 1, an elastic body 22 is preferably sandwiched between the first battery module 2A and the second battery module 2B arranged side by side in the first direction inside the battery case 3. With such an elastic body 22, even if the first battery module 2A and the second battery module 2B expand and contract in the first direction in response to charging and discharging, the elastic body 22 can maintain the first battery module 2A and the second battery module 2B in a restrained state (pressed state).

[0021] A clearance is provided between the battery case 3 and the battery modules 2A, 2B. The clearance in the first direction is set in consideration of the expansion and contraction of the battery modules 2A, 2B in response to charging and discharging.

[0022] The clearance in the first direction is set so that the mounting density of the battery modules 2A and 2B is appropriate when the battery modules 2A and 2B are in the initial state (both charging capacities SOC are about 75%) as shown in the left side of FIG. 11. In this case, since the amount of expansion caused by charging is particularly large in the all-solid-state battery, when both the battery modules 2A and 2B are in a fully charged state (both charging capacities SOC are 100%) as shown in the center of FIG. 11, the battery modules 2A and 2B may interfere with the battery case 3. For this reason, in the past, the clearance in the first direction was increased as shown in the right side of FIG. 11, but this reduces the battery mounting density. In the present invention, the clearance in the first direction is reduced by a control to be described later, and a reduction in the battery mounting density in the battery case 3 is suppressed.

[0023] The charger 4 is an on-board charger mounted on the mobile object 1, and converts a household 100V AC power source connected to the normal charging terminal 5A into a predetermined DC voltage to charge the battery modules 2A, 2B. The battery modules 2A, 2B to be charged by the charger 4 can be selected by switching a first switch SW1 and a second switch SW2.

[0024] The quick charging terminal 5B is connected to a quick charger (not shown) provided outside the moving object 1. The battery modules 2A, 2B to be charged by the quick charger can be selected by switching the third switch SW3 and the fourth switch SW4.

[0025] The first load 6A is, for example, a motor that drives the moving object 1, and the second load 6B is, for example, an air conditioner, an audio device, an electric light, and the like of the moving object 1.

[0026] The battery control device 7 controls the charging and discharging of the battery modules 2A, 2B. The battery control device 7 of the present embodiment adjusts the expansion and contraction of the battery modules 2A, 2B based on the charging and discharging control of the battery modules 2A, 2B, thereby reducing the clearance in the first direction between the battery case 3 and the battery modules 2A, 2B, and making it possible to suppress a decrease in the battery mounting density. Specific control contents of the battery control device 7 will be described below with reference to Figs. 2 to 7.

[0027] When either the first battery module 2A or the second battery module 2B is charged by the charger 4, the battery control device 7 prohibits charging of the other battery module 2B of the first battery module 2A and the second battery module 2B. Specifically, as shown in FIG. 2, when the first battery module 2A is charged, the battery control device 7 prohibits charging of the second battery module 2B. In this way, even if the first battery module 2A expands, the second battery module 2B will not expand. Note that the example in FIG. 2 and subsequent figures illustrates a case where the first battery module 2A is charged, but it goes without saying that the second battery module 2B may be charged instead of the first battery module 2A.

[0028] This suppresses the expansion of the battery modules 2A, 2B in the first direction, making it possible to reduce the clearance in the first direction between the battery modules 2A, 2B and the battery case 3. This suppresses a decrease in the battery mounting density in the battery case 3. This control is particularly effective in the case of all-solid-state batteries that have a large amount of expansion.

[0029] When one of the battery modules 2A, 2B is charged by the charger 4, the battery control device 7 preferably discharges the other battery module 2B, 2A. Specifically, as shown in FIG. 3, when the first battery module 2A is charged, the battery control device 7 controls the second battery module 2B to discharge to the second load 6B. In this way, even if the first battery module 2A expands, the second battery module 2B contracts, so that the expansion of the battery modules 2A, 2B in the first direction is further suppressed. Therefore, it is possible to further reduce the clearance in the first direction between the battery modules 2A, 2B and the battery case 3.

[0030] When one of the battery modules 2A, 2B is charged by a rapid charger, the battery control device 7 preferably controls the other battery module 2B, 2A to be discharged. Specifically, as shown in FIG. 4, when the first battery module 2A is rapid charged, the battery control device 7 controls the second battery module 2B to be discharged to the second load 6B. In this way, even if the first battery module 2A expands during rapid charging, the second battery module 2B contracts, so that the expansion of the battery modules 2A, 2B in the first direction is further suppressed. Therefore, it is possible to further reduce the clearance in the first direction between the battery modules 2A, 2B and the battery case 3.

[0031] When discharging one of the battery modules 2A, 2B (for example, when the mobile body is traveling), the battery control device 7 preferably supplies power from one of the battery modules 2A, 2B to the other battery module 2B, 2A via the connection path C5 and charges the other battery module 2B, 2A. Specifically, as shown in FIG. 5, when discharging from the first battery module 2A to the first load 6A (for example, when the mobile body is traveling), the battery control device 7 supplies power from the first battery module 2A to the second battery module 2B via the connection path C5 and charges the second battery module 2B. In this way, the contraction amount of one of the battery modules 2A, 2B can be offset by the expansion of the other battery modules 2B, 2A. This makes it possible to suppress a decrease in the binding force due to excessive contraction of the battery modules 2A, 2B.

[0032] As shown in Fig. 1, the moving object 1 may be provided with a sensor device 71 that detects or predicts a collision of the moving object 1. As shown in Fig. 6, the battery control device 7 preferably causes the first battery module 2A and the second battery module 2B to discharge to the second load 6B when the sensor device 71 detects or predicts a collision of the moving object 1. In this way, the battery modules 2A, 2B are contracted when the moving object collides, thereby increasing the clearance and reducing the stress acting on the battery modules 2A, 2B.

[0033] Moreover, it is preferable that the battery control device 7 monitors the charge capacity of the first battery module 2A and the second battery module 2B, and controls the charge and discharge of the first battery module 2A and the second battery module 2B based on the charge capacity. In other words, by monitoring the charge capacity, it becomes possible to estimate the amount of expansion and contraction of the battery modules 2A and 2B, and appropriately control the charge and discharge of the battery modules 2A and 2B.

[0034] For example, as shown in Fig. 7, the battery control device 7 controls the charging and discharging of the first battery module 2A and the second battery module 2B so that the sum of the charge capacity of the first battery module 2A and the charge capacity of the second battery module 2B is equal to or less than a predetermined value (e.g., 150%). In this case, the charge capacity of both may be 75% as shown on the left side of Fig. 7, or the charge capacity of one may be 100% and the charge capacity of the other may be 50% as shown in the center of Fig. 7, or the charge capacity of both may be 50% as shown on the right side of Fig. 8. In this way, the expansion of the first battery module 2A and the second battery module 2B arranged in the battery case 3 in the first direction can be restricted, and excessive stress can be prevented from acting on the first battery module 2A and the second battery module 2B.

[0035] <First Modification> Next, a first modified example of the embodiment of the present invention will be described with reference to Fig. 8 and Fig. 9. However, for configurations common to the above-mentioned embodiment, the same reference numerals as those in the above-mentioned embodiment are used, and the description of the above-mentioned embodiment may be used.

[0036] 8 differs from the above embodiment in that a battery module is not formed from a plurality of battery cells 21 stacked in the first direction, but the plurality of battery cells 21 stacked in the first direction are treated as a first battery cell group 2C arranged in a first region and a second battery cell group 2D arranged in a second region adjacent to each other in the first direction. The electrical connection configuration is similar to that of the first battery module 2A and the second battery module 2B of the first embodiment, such as the first battery cell group 2C and the second battery cell group 2D being electrically connected in parallel to the loads 6A, 6B and the charger 4.

[0037] 9, the battery cells 21 stacked in the first direction have battery cells 211 located at both ends in the first direction fixed to a lower plate 23 fixed to the bottom of the battery case 3, and the other battery cells 212 are slidably displaced in the first direction relative to the lower plate 23. In this manner, the battery cells 21 are displaced in the first direction in response to expansion and contraction of the battery cells 21 accompanying charging and discharging, thereby reducing stress acting on the battery cells 21. It is preferable that an elastic body 22 is interposed between a first battery cell group 2C arranged in the first region and a second battery cell group 2D arranged in the second region adjacent to each other in the first direction.

[0038] When charging either the first battery cell group 2C or the second battery cell group 2D, the battery control device 7 prohibits charging the other battery cell group 2D or the other battery cell group 2C or the other battery cell group 2D. Even in this first modified example, the clearance between the battery cells 21 and the battery case 3 can be reduced, and a decrease in battery mounting density can be suppressed.

[0039] <Second Modification> Next, a second modified example of the embodiment of the present invention will be described with reference to FIG. In the above embodiment, the number of battery modules arranged in series in the first direction inside the battery case 3 is two, but in the second modified example, the number of battery modules arranged in series in the first direction is three.

[0040] In this modification, the battery module group 2 includes a plurality of first battery modules 2A (three in this embodiment) electrically connected in series, a plurality of second battery modules 2B (three in this embodiment) electrically connected in series, and a plurality of third battery modules 2E (three in this embodiment) electrically connected in series. Note that the number of the first battery modules 2A, the second battery modules 2B, and the third battery modules 2E may be one or two, or may be four or more.

[0041] Although not shown in the figures, the first battery module 2A, the second battery module 2B, and the third battery module 2E are electrically connected in parallel to the first load 6A, the second load 6B, the charger 4, and the quick-charging terminal 5B. When charging at least one of the three battery modules, the battery control device 7 discharges at least one of the remaining battery modules. This reduces the clearance between the battery modules and the battery case, and suppresses a decrease in battery mounting density. The number of battery modules arranged in series in the first direction may be four or more.

[0042] Although various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the claims, and it is understood that these also naturally belong to the technical scope of the present invention. Furthermore, the components in the above-mentioned embodiments may be arbitrarily combined within the scope of the invention.

[0043] For example, in the above embodiment, an all-solid-state battery using a solid electrolyte is exemplified, but the present invention is not limited to this and may be applied to a secondary battery using an electrolytic solution.

[0044] This specification describes at least the following items. Note that, in parentheses, components corresponding to those in the above-mentioned embodiment are shown, but the present invention is not limited to these.

[0045] (1) a first battery module (first battery module 2A) and a second battery module (second battery module 2B), each of which has a plurality of battery cells (battery cells 21) stacked in a first direction; a battery case (battery case 3) that houses the first battery module and the second battery module; a charger (charger 4) that charges the first battery module and the second battery module; Load (load 6A) and A mobile body (mobile body 1) including a battery control device (battery control device 7) that controls the first battery module and the second battery module, The first battery module and the second battery module are arranged side by side in the first direction, the first battery module and the second battery module are electrically connected in parallel to the load and the charger; The battery control device includes: When one of the first battery module and the second battery module is being charged, charging of the other of the first battery module and the second battery module is prohibited.

[0046] According to (1), in consideration of the characteristics of the battery cells expanding during charging, one battery module arranged in a row in the stacking direction of the battery cells in the case is prohibited from being charged while the other battery module is being charged, thereby suppressing the expansion of the first battery module and the second battery module in the first direction. Therefore, the clearance between the battery modules and the battery case can be reduced, and a decrease in the battery mounting density in the battery case can be suppressed.

[0047] (2) A moving object according to (1), The first battery module and the second battery module have a solid electrolyte.

[0048] According to (2), in an all-solid-state battery, the amount of expansion of the battery cell during charging is large, so the clearance can be reduced more effectively.

[0049] (3) A moving object according to (1) or (2), The battery control device includes: When the one battery module is charged, the other battery module is discharged.

[0050] According to (3), by taking into account the characteristics of battery cells that expand when charged and contract when discharged, one battery module is discharged while the other battery module is being charged, the expansion of the first battery module and the second battery module in the first direction is further suppressed and the clearance can be reduced.

[0051] (4) A moving object according to (1) or (2), The battery control device includes: When discharging the one battery module, the moving body supplies power from the one battery module to the other battery module to charge the other battery module.

[0052] According to (4), by taking into account the characteristics of the battery cells that expand when charged and contract when discharged, one battery module is charged while the other battery module is discharged, it is possible to prevent a decrease in the restraining force due to excessive contraction of the first battery module and the second battery module in the first direction.

[0053] (5) A moving object according to any one of (1) to (4), The moving body, wherein an elastic body (elastic body 22) is sandwiched between the first battery module and the second battery module.

[0054] According to (5), the first battery module and the second battery module can be maintained in a restrained (pressed) state by the elastic body.

[0055] (6) A moving object according to any one of (1) to (5), The moving body further includes a sensor device (sensor device 71) that detects or predicts a collision of the moving body, The battery control device discharges the first battery module and the second battery module when detecting or predicting a collision of the moving body.

[0056] According to (6), by discharging the first battery module and the second battery module when a collision is detected or predicted, the battery modules are contracted, thereby reducing the stress acting on the first battery module and the second battery module due to the clearance.

[0057] (7) A moving body according to any one of (1) to (6), the battery control device monitors the charge capacities of the first battery module and the second battery module; A moving object that controls charging and discharging of the first battery module and the second battery module based on the charge capacity.

[0058] According to (7), the amount of expansion and contraction of the battery module can be estimated by monitoring the charge capacity.

[0059] (8) A moving object according to (7), The battery control device includes: a mobile body that controls charging and discharging of the first battery module and the second battery module so that a sum of a charge capacity of the first battery module and a charge capacity of the second battery module is equal to or less than a predetermined value.

[0060] According to (8), by setting the sum of the charge capacities of the first battery module and the second battery module arranged in the stacking direction of the battery cells to a predetermined value or less, it is possible to avoid excessive stress being applied to the first battery module and the second battery module arranged in the battery case.

[0061] (9) A moving body according to any one of (1) to (8), The moving object is configured to be connectable to a quick charger provided outside the moving object, The battery control device includes: When the one battery module is charged by the rapid charger, the other battery module is controlled to be discharged.

[0062] According to (9), by controlling one battery module to discharge while the other battery module is being rapid-charged, expansion of the first battery module and the second battery module in the first direction during rapid charging can be suppressed. Therefore, the clearance between the battery modules and the battery case can be reduced, and a decrease in the battery mounting density in the battery case can be suppressed.

[0063] (10) a battery case (battery case) that accommodates a plurality of battery cells (battery cells 21) stacked in a first direction; a charger (charger 4) for charging the plurality of battery cells; Load (load 6A) and A mobile body (mobile body 1) including a battery control device (battery control device 7) that controls the plurality of battery cells, the plurality of battery cells include a first battery cell group (first battery cell group 2C) arranged in a first region adjacent to each other in the first direction, and a second battery cell group (second battery cell group 2D) arranged in a second region; the first battery cell group and the second battery cell group are electrically connected in parallel to the load and the charger; The battery control device includes: When one of the first battery cell group and the second battery cell group is charged, charging of the other of the first battery cell group and the second battery cell group is prohibited.

[0064] According to (10), in consideration of the characteristic of battery cells expanding during charging, one battery cell group arranged in a stacking direction of the battery cells in the case is prohibited from being charged while the other battery cell group is being charged, thereby suppressing expansion of the first battery cell group and the second battery cell group in the first direction. Therefore, the clearance between the battery cell group and the battery case can be reduced, and a decrease in the battery mounting density in the battery case can be suppressed.

[0065] (11) at least three battery modules (battery modules 2A, 2B, 2E), each of which has a plurality of battery cells (battery cells 21) stacked in a first direction; a battery case (battery case 3) that houses the at least three battery modules; a charger (charger 4) for charging the at least three battery modules; Load (load 6A) and A mobile body (mobile body 1) including a battery control device (battery control device 7) that controls the at least three battery modules, The at least three battery modules are arranged side by side in the first direction, the at least three battery modules are electrically connected in parallel to the load and the charger; The battery control device includes: When at least one battery module of the at least three battery modules is charged, at least one of the remaining battery modules is discharged.

[0066] According to (11), when multiple battery modules are arranged in a case in the stacking direction of the battery cells, taking into consideration the characteristics of the battery cells expanding during charging, when at least one battery module of at least three battery modules is charged, at least one of the remaining battery modules is discharged. This makes it possible to reduce the clearance between the battery module and the battery case, and suppress a decrease in the battery mounting density in the battery case. [Explanation of symbols]

[0067] 1. Mobile 2A 1st Battery Module 2B Second battery module 2C 1st battery cell group 2D Second battery cell group 2E 3rd Battery Module 21 Battery Cell 22 Elastic Body 3 Battery case 4 charger 6A 1st load 6B 2nd load 7 Battery Control Unit 71 Sensor Device

Claims

1. a first battery module and a second battery module each including a plurality of battery cells stacked in a first direction; a battery case that accommodates the first battery module and the second battery module; a charger that charges the first battery module and the second battery module; Load and A mobile body including a battery control device that controls the first battery module and the second battery module, The first battery module and the second battery module are arranged side by side in the first direction, the first battery module and the second battery module are electrically connected in parallel to the load and the charger; The battery control device includes: When one of the first battery module and the second battery module is being charged, charging of the other of the first battery module and the second battery module is prohibited.

2. The moving body according to claim 1 , The first battery module and the second battery module have a solid electrolyte.

3. The moving body according to claim 1 or 2, The battery control device includes: When the one battery module is charged, the other battery module is discharged.

4. The moving body according to claim 1 or 2, The battery control device includes: When discharging the one battery module, the moving body supplies power from the one battery module to the other battery module to charge the other battery module.

5. A moving body according to any one of claims 1 to 4, A moving body, wherein an elastic body is sandwiched between the first battery module and the second battery module.

6. A moving body according to any one of claims 1 to 5, The moving body further includes a sensor device that detects or predicts a collision of the moving body, The battery control device discharges the first battery module and the second battery module when detecting or predicting a collision of the moving body.

7. A moving body according to any one of claims 1 to 6, The battery control device monitors the charge capacities of the first battery module and the second battery module, A moving object that controls charging and discharging of the first battery module and the second battery module based on the charge capacity.

8. The moving body according to claim 7, The battery control device includes: a mobile body that controls charging and discharging of the first battery module and the second battery module so that a sum of a charge capacity of the first battery module and a charge capacity of the second battery module is equal to or less than a predetermined value.

9. A moving body according to any one of claims 1 to 8, The moving object is configured to be connectable to a quick charger provided outside the moving object, The battery control device includes: When the one battery module is charged by the rapid charger, the other battery module is controlled to be discharged.

10. a battery case that houses a plurality of battery cells stacked in a first direction; a charger for charging the plurality of battery cells; Load and A mobile object comprising: a battery control device that controls the plurality of battery cells, the plurality of battery cells include a first battery cell group arranged in a first region and a second battery cell group arranged in a second region adjacent to each other in the first direction, the first battery cell group and the second battery cell group are electrically connected in parallel to the load and the charger; The battery control device includes: When one of the first battery cell group and the second battery cell group is charged, charging of the other of the first battery cell group and the second battery cell group is prohibited.

11. At least three battery modules, each of which has a plurality of battery cells stacked in a first direction; a battery case that houses the at least three battery modules; a charger for charging the at least three battery modules; Load and A battery control device that controls the at least three battery modules, The at least three battery modules are arranged side by side in the first direction, the at least three battery modules are electrically connected in parallel to the load and the charger; The battery control device includes: When at least one battery module of the at least three battery modules is charged, at least one of the remaining battery modules is discharged.

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