Compression device

Abstract

The disclosed compression device (10) is provided with: a compression roller (20) which has a roller main body section (21) and a shaft section (22) and which compresses an electrode plate (100) for a battery by means of the roller main body section (21); a circulating oil supply type bearing (30) that rotatably supports the shaft part (22); and temperature control devices (41, 42) which are connected to the bearing (30) via a pipe (50) and which control the temperature of the bearing (30) by supplying the temperature-adjusted lubricating oil to the bearing (30). The temperature control devices (41, 42) are configured so as to adjust the temperature of the lubricating oil such that the difference between the temperature of the lubricating oil and a target oil temperature determined on the basis of a roller center temperature, which is the temperature of the center region of the roller body (21), is equal to or less than a first threshold value. As a result, the occurrence of thermal convexity can be suppressed.

Description

Technical Field

[0001] The present disclosure relates to a compression device. Background Art

[0002] Conventionally, a compression device for compressing a plate electrode for a battery has been known (for example, Patent Document 1). The compression device of Patent Document 1 includes a compression roller that compresses the plate electrode, a plurality of bearings that support both end portions of the compression roller, a lubricating oil temperature adjustment unit that adjusts the temperature of the lubricating oil supplied to each bearing, a plurality of temperature sensors that detect the surface temperatures of the central portion and both end portions of the compression roller, and a control unit that controls the lubricating oil temperature adjustment unit based on the detection values of the plurality of temperature sensors. Here, the control unit controls the lubricating oil temperature adjustment unit so that the surface temperature of the central portion of the compression roller coincides with the surface temperature of both end portions of the compression roller.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2022-41417 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] However, in the compression device of Patent Document 1, there is a concern about the generation of thermal crown, which is a phenomenon in which, according to the temperature distribution inside the compression roller, the shape of the compression roller changes, resulting in undulations on the surface. This is because, according to the above control method, the surface temperature of the compression roller may become uniform over the entire length, but a gradient may be generated in the internal temperature of the compression roller. For example, when the internal temperature of the central portion of the compression roller is higher than the internal temperature of both end portions of the compression roller, even if the surface temperatures of both are equal, thermal crown such as the central portion bulging occurs because the central portion of the compression roller expands relatively greatly thermally. If thermal crown occurs, the thickness of the compressed plate electrode becomes uneven. In such a situation, one of the objects of the present disclosure is to suppress the occurrence of thermal crown.

[0008] Means for Solving the Problems

[0009] One aspect of the present disclosure relates to a compression device. The compression device includes: a compression roller having a roller main body portion and a shaft portion, and compressing a battery electrode plate by the roller main body portion; a circulating oil supply type bearing rotatably supporting the shaft portion; and a temperature control device connected to the bearing via a pipe, and controlling the temperature of the bearing by supplying temperature-adjusted lubricating oil to the bearing. The temperature control device is configured to adjust the temperature of the lubricating oil so that the difference between the temperature of the lubricating oil and a target oil temperature determined based on the roller center temperature is equal to or less than a first threshold value, where the roller center temperature is the temperature of the central region of the roller main body portion.

[0010] Another aspect of the present disclosure relates to a compression device. The compression device includes: a compression roller having a roller main body portion and a shaft portion, and compressing a battery electrode plate by the roller main body portion; a circulating oil supply type bearing rotatably supporting the shaft portion; and a temperature control device connected to the bearing via a pipe, and controlling the temperature of the bearing by supplying temperature-adjusted lubricating oil to the bearing. The temperature control device is configured to adjust the temperature of the lubricating oil so that the difference between the temperature of the shaft portion or the bearing and a target oil temperature determined based on the roller center temperature is equal to or less than a second threshold value, where the roller center temperature is the temperature of the central region of the roller main body portion.

[0011] Advantages of the Invention

[0012] According to the present disclosure, the occurrence of thermal camber can be suppressed.

[0013] The novel features of the present invention are described in the appended claims. However, both the structure and content of the present invention can be better understood by referring to the following detailed description with reference to the drawings in combination with other objects and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram schematically showing the compression device of Embodiment 1.

[0015] Figure 2 It is a flowchart showing the temperature control method of the lubricating oil of Embodiment 1.

[0016] Figure 3 It is a structural diagram schematically showing the compression device of Embodiment 2.

[0017] Figure 4 It is a flowchart showing the temperature control method of the lubricating oil of Embodiment 2. DETAILED DESCRIPTION OF THE INVENTION

[0018] For the embodiments of the compression device related to the present disclosure, examples are given below. However, the present disclosure is not limited to the examples described below. In the following description, specific numerical values and materials are sometimes illustrated, but other numerical values and materials can also be applied as long as the effects of the present disclosure can be obtained.

[0019] A compression device according to an embodiment of the present disclosure (hereinafter, also referred to as compression device A) is a device for compressing a battery plate (hereinafter, also simply referred to as a plate). It includes a compression roller, a bearing, and a temperature control device. In addition, the battery includes primary batteries such as lithium primary batteries, and secondary batteries such as alkaline storage batteries (nickel-metal hydride batteries, nickel-cadmium batteries, etc.), lithium-ion secondary batteries, lithium-metal secondary batteries, and all-solid-state batteries including solid electrolytes. In the present disclosure, within the category of secondary batteries, it also includes electrical storage devices (e.g., lithium-ion capacitors) in which at least one of the positive and negative electrodes exhibits capacitance through a Faraday reaction.

[0020] The compression roller has a roller main body portion and a shaft portion, and the battery plate is compressed by the roller main body portion. The roller main body portion can be supported by the shaft portion. The plate can have a coated portion where an active material layer is formed on the surface of a substrate (current collector plate), and a foil exposed portion (uncoated portion) where no active material layer is formed on the surface of the substrate. The compression roller can compress the coated portion of the plate through the roller main body portion. The compression roller can have a pair of rollers arranged at a given interval. In addition, the compression roller can also be configured to compress not only the coated portion of the plate but also the uncoated portion of the plate. Typically, when the compression roller compresses a plate having an active material layer formed by intermittently coating a composite agent slurry on a substrate, the uncoated portion of the plate is compressed. Such a plate has a structure in which the coated portions are intermittently formed in the length direction of the substrate, and the uncoated portions between adjacent coated portions are compressed by the compression roller.

[0021] The bearing is a circulating oil supply type bearing that rotatably supports the shaft portion of the compression roller. The bearing can also be a circulating oil supply type rolling bearing.

[0022] The temperature control device is connected to the bearing via a pipe. The temperature control device controls the temperature of the bearing by supplying lubricating oil whose temperature has been adjusted to the bearing. The temperature control device can have a heating portion for heating the lubricating oil and a cooling portion for cooling the lubricating oil. The heating portion can, for example, also have a resistance heater for heating the lubricating oil. The cooling portion can, for example, also have a refrigerant evaporator for cooling the lubricating oil. In addition, the temperature control device can also have a circulating device (e.g., a pump) for circulating the lubricating oil.

[0023] The temperature control device is configured to adjust the temperature of the lubricating oil so that the difference between the temperature of the lubricating oil and the target oil temperature determined based on the central temperature of the roll becomes equal to or less than the first threshold value. The central temperature of the roll is the temperature of the central region of the roll main body. The temperature of the lubricating oil may be the temperature of the lubricating oil flowing out of the temperature control device, the temperature of the lubricating oil flowing into the temperature control device, or the temperature of the lubricating oil at other positions in the lubricating oil circulation path. The central region of the roll main body refers to the region within 50% of the center in the length direction (or axial direction) of the roll main body. In particular, the central region of the roll main body is preferably the region in contact with the electrode plate. The target oil temperature may also be the central temperature of the roll, or the temperature obtained by adding a given value (any positive or negative value) to the central temperature of the roll. The first threshold value may be, for example, 0.2 °C or more and 0.5 °C or less.

[0024] In the compression device A having the above structure, when the target oil temperature is the central temperature of the roll, the temperature of the shaft portion becomes substantially the same as the temperature of the roll main body due to the heating or cooling action of the lubricating oil flowing in the bearing. That is, the temperature is substantially uniform throughout the compression roll. Thereby, the occurrence of thermal camber can be suppressed. On the other hand, in the compression device A, when the target oil temperature is the temperature obtained by adding a given value to the central temperature of the roll, a state in which a difference corresponding to the given value is generated between the temperature of the shaft portion and the temperature of the roll main body due to the heating or cooling action of the lubricating oil flowing in the bearing. Thereby, a desired thermal camber can also be generated. For example, by slightly expanding the central region of the roll main body, the portion of the electrode plate in contact with the central region can be formed thinner than other portions.

[0025] The temperature control device may also be configured such that when the difference between the central temperature of the roll and the first target temperature (hereinafter also referred to as the first temperature deviation) is equal to or less than the first threshold value, the temperature of the lubricating oil is adjusted to the first target temperature, and is configured such that when the difference between the central temperature of the roll and the first target temperature (the first temperature deviation) exceeds the first threshold value, the temperature of the lubricating oil is adjusted to the second target temperature obtained by adding the difference between the central temperature of the roll and the first target temperature (the first temperature deviation) to the first target temperature. In the former case, the occurrence of thermal camber can be sufficiently suppressed by the lubricating oil whose temperature is adjusted to the first target temperature. This is because if the difference between the central temperature of the roll and the temperature of the lubricating oil (the temperature extremely close to the temperature of the shaft portion) is small, the heat transfer inside the compression roll is suppressed. On the other hand, in the latter case, there is a concern that the occurrence of thermal camber cannot be sufficiently suppressed by the lubricating oil whose temperature is adjusted to the first target temperature. This is because if the difference between the central temperature of the roll and the temperature of the lubricating oil is large, a non-negligible temperature gradient is generated inside the compression roll, and heat moves inside the compression roll. Therefore, in this structure, in the latter case, by adjusting the temperature of the lubricating oil to the second target temperature obtained by adding the first temperature deviation to the first target temperature, the difference between the central temperature of the roll and the temperature of the lubricating oil is reduced, and the temperature gradient inside the compression roll is reduced. Thereby, the occurrence of thermal camber can be sufficiently suppressed.

[0026] The compression device (hereinafter also referred to as compression device B) according to another embodiment of the present disclosure is a device for compressing a battery plate, and includes a compression roll, a bearing, and a temperature control device.

[0027] The compression roll may be the same as the compression roll of compression device A.

[0028] The bearing may be the same as the bearing of compression device A.

[0029] The temperature control device is connected to the bearing via a pipe. The temperature control device controls the temperature of the bearing by supplying temperature-adjusted lubricating oil to the bearing. The temperature control device may also have a heating unit for heating the lubricating oil, a cooling unit for cooling the lubricating oil, and a circulation device for circulating the lubricating oil.

[0030] The temperature control device is configured to adjust the temperature of the lubricating oil such that the difference between the temperature of the shaft portion or the bearing and the target oil temperature determined based on the central temperature of the roll is equal to or less than the second threshold value, where the central temperature of the roll is the temperature of the central region of the roll main body portion. The temperature of the shaft portion or the bearing may be the temperature of the portion of the shaft portion close to the bearing, or may also be the temperature of the shaft housing that houses the bearing. The target oil temperature may also be the central temperature of the roll, or may also be the temperature obtained by adding a given value (any positive or negative value) to the central temperature of the roll. The second threshold value may be, for example, 0.2 °C or more and 0.5 °C or less.

[0031] In the compression device B having the above structure, the same effects as those of the compression device A can also be obtained. That is, the occurrence of thermal camber can be suppressed, or a desired thermal camber can be made to occur.

[0032] The temperature control device may also be configured such that when the difference between the roll center temperature and the third target temperature (hereinafter, also referred to as the second temperature deviation) is equal to or less than the second threshold value, the temperature of the lubricating oil is adjusted to the third target temperature, and is configured such that when the difference between the roll center temperature and the third target temperature (the second temperature deviation) exceeds the second threshold value, the temperature of the lubricating oil is adjusted to the fourth target temperature obtained by adding the difference between the roll center temperature and the third target temperature (the second temperature deviation) to the third target temperature. In the former case, the occurrence of thermal camber can be sufficiently suppressed by the lubricating oil whose temperature is adjusted to the third target temperature. This is because if the difference between the roll center temperature and the temperature of the lubricating oil (the temperature extremely close to the temperature of the shaft portion) is small, the heat transfer inside the compression roll is suppressed. On the other hand, in the latter case, there is a concern that the occurrence of thermal camber cannot be sufficiently suppressed by the lubricating oil whose temperature is adjusted to the third target temperature. This is because if the difference between the roll center temperature and the temperature of the lubricating oil is large, a non-negligible temperature gradient is generated inside the compression roll, and heat moves inside the compression roll. Therefore, in this structure, in the latter case, by adjusting the temperature of the lubricating oil to the fourth target temperature obtained by adding the second temperature deviation to the third target temperature, the difference between the roll center temperature and the temperature of the lubricating oil is reduced, and the temperature gradient inside the compression roll is reduced. Thereby, the occurrence of thermal camber can be sufficiently suppressed.

[0033] As described above, according to the present disclosure, by making the temperature substantially uniform throughout the entire compression roll, the occurrence of thermal camber can be suppressed. Further, according to the present disclosure, a desired thermal camber can be made to occur by changing the target oil temperature.

[0034] Hereinafter, an example of the compression device according to the present disclosure will be specifically described with reference to the drawings. The above-described constituent elements can be applied to the constituent elements of the compression device of an example described below. The constituent elements of the compression device of an example described below can be changed based on the above description. In addition, the matters described below can also be applied to the above-described embodiments. Constituent elements that are not essential for the compression device according to the present disclosure among the constituent elements of the compression device of an example described below can be omitted. In addition, the drawings shown below are schematic and do not accurately reflect the shapes and numbers of actual components.

[0035] <<Embodiment 1>>

[0036] Description is given to Embodiment 1 of the present disclosure. The compression device 10 of the present embodiment is a device for compressing the electrode plate 100 for a battery (for example, a lithium ion secondary battery) (hereinafter, also simply referred to as the electrode plate 100). Although not shown in the drawings, the electrode plate 100 has a coated portion in which an active material layer is formed on the surface of a base material (current collector), and a foil exposed portion (uncoated portion) in which the active material layer is not formed on the surface of the base material.

[0037] As Figure 1 shown, the compression device 10 includes a compression roller 20, a plurality of bearings 30, a first temperature control device 41, a second temperature control device 42, a first roller temperature sensor 61, a second roller temperature sensor 62, a first oil temperature sensor 71, a second oil temperature sensor 72, and a control unit 90.

[0038] The compression roller 20 has a pair of rollers 20A and 20B, and compresses the electrode plate 100 for a battery (specifically, the coated portion of the electrode plate 100) therebetween. The compression roller 20 has a roller main body portion 21 for compressing the electrode plate 100, and a shaft portion 22 for supporting the roller main body portion 21.

[0039] A plurality of (in this example, four) bearings 30 rotatably support the shaft portion 22 of the compression roller 20. Each bearing 30 is a bearing with circulating oil supply. Each bearing 30 may also be, for example, a rolling bearing with circulating oil supply. Each bearing 30 is housed in a bearing housing 31.

[0040] The first temperature control device 41 is connected via a pipe 50 to the bearing 30 that supports the shaft portion 22 of one roller 20A ( Figure 1 the upper roller 20A in this case). The first temperature control device 41 controls the temperature of the bearing 30 by supplying lubricating oil whose temperature has been adjusted to the bearing 30. Specifically, the first temperature control device 41 is configured to adjust the temperature of the lubricating oil so that the difference between the temperature of the lubricating oil and the temperature of the central region of the roller main body portion 21 of one roller 20A (roller central temperature), that is, the target oil temperature, becomes equal to or less than a first threshold value. The first temperature control device 41 is an example of a temperature control device. In addition, the target oil temperature may also be the temperature obtained by adding a given value to the roller central temperature.

[0041] The second temperature control device 42 is connected via a pipe 50 to the bearing 30 that supports the shaft portion 22 of the other roller 20B ( Figure 1is connected to a bearing 30 that supports the shaft portion 22 of the lower roller 20B. The second temperature control device 42 controls the temperature of the bearing 30 by supplying lubricating oil whose temperature has been adjusted to the bearing 30. Specifically, the second temperature control device 42 is configured to adjust the temperature of the lubricating oil so that the difference between the temperature of the lubricating oil and the target oil temperature, which is the roller center temperature of the other roller 20B, becomes equal to or less than a first threshold value. The second temperature control device 42 is an example of a temperature control device. In addition, the target oil temperature may be a temperature obtained by adding a given value to the roller center temperature.

[0042] The first roller temperature sensor 61 detects the roller center temperature of one roller 20A. The first roller temperature sensor 61 preferably detects the surface temperature at the center in the axial direction of one roller 20A as the roller center temperature. The first roller temperature sensor 61 may be a non-contact temperature sensor or a contact temperature sensor. The data of the roller center temperature detected by the first roller temperature sensor 61 is sent to the control unit 90.

[0043] The second roller temperature sensor 62 detects the roller center temperature of the other roller 20B. The second roller temperature sensor 62 preferably detects the surface temperature at the center in the axial direction of the other roller 20B as the roller center temperature. The second roller temperature sensor 62 may be a non-contact temperature sensor or a contact temperature sensor. The data of the roller center temperature detected by the second roller temperature sensor 62 is sent to the control unit 90.

[0044] The first oil temperature sensor 71 detects the temperature of the lubricating oil flowing out from the first temperature control device 41 (hereinafter, also referred to as the first outflow temperature). The first oil temperature sensor 71 may detect the temperature of the pipe 50 near the outlet of the first temperature control device 41 as the outflow temperature. The first oil temperature sensor 71 may be a contact temperature sensor or a non-contact temperature sensor. The data of the first outflow temperature detected by the first oil temperature sensor 71 is sent to the control unit 90. In addition, the first oil temperature sensor 71 may also detect the temperature of the lubricating oil flowing into the first temperature control device 41, or may detect the temperature of the lubricating oil at any position in the flow path corresponding to the first temperature control device 41.

[0045] The second oil temperature sensor 72 detects the temperature of the lubricating oil flowing out from the second temperature control device 42 (hereinafter, also referred to as the second outflow temperature). The second oil temperature sensor 72 may also detect the temperature of the pipe 50 near the outlet of the second temperature control device 42 as the outflow temperature. The second oil temperature sensor 72 may be a contact type temperature sensor or a non-contact type temperature sensor. The data of the second outflow temperature detected by the second oil temperature sensor 72 is sent to the control unit 90. In addition, the second oil temperature sensor 72 may also detect the temperature of the lubricating oil flowing into the second temperature control device 42, and may also detect the temperature of the lubricating oil at any part in the flow path of the lubricating oil corresponding to the second temperature control device 42.

[0046] The control unit 90 controls the operations of the components of the compression device 10. For example, the control unit 90 controls the operations of the first temperature control device 41 and the second temperature control device 42 based on the data sent from the first roller temperature sensor 61, the second roller temperature sensor 62, the first oil temperature sensor 71, and the second oil temperature sensor 72. The control unit 90 includes an arithmetic device and a storage device that stores programs executable by the arithmetic device.

[0047] Next, for an example of the method of controlling the temperature of the lubricating oil, refer to Figure 2 for description.

[0048] First, in step ST11, the control unit 90 acquires the central roller temperature T CE . The central roller temperature T CE of one roller 20A can be acquired using the first roller temperature sensor 61. The central roller temperature T CE of the other roller 20B can be acquired using the second roller temperature sensor 62. In addition, after the control unit 90 acquires the central roller temperature T CE , it starts the temperature acquisition timer for measuring the elapsed time. Next, proceed to step ST12.

[0049] In step ST12, the control unit 90 calculates the first temperature deviation ΔT1. The first temperature deviation ΔT1 is the difference between the central roller temperature T CE and the first target temperature T t1 (ΔT1 = T CE - T t1 ). The first target temperature T t1 is used as the target temperature of the lubricating oil supplied to each bearing 30. The first target temperature T t1 may also be the average value of the central roller temperatures T CE of the rollers 20A and 20B. Next, proceed to step ST13.

[0050] In step ST13, the control unit 90 determines whether the absolute value of the first temperature deviation ΔT1 is greater than the first threshold Th1. When the absolute value is greater than the first threshold Th1, it proceeds to step ST14. On the other hand, when the absolute value is less than or equal to the first threshold Th1, it proceeds to step ST15. In addition, when the absolute value is less than or equal to the first threshold Th1, the control unit 90 controls the first temperature control device 41 and the second temperature control device 42 so that the temperature of the lubricating oil becomes the first target temperature T t1 .

[0051] In step ST14, the control unit 90 performs target value correction. Specifically, the control unit 90 corrects the target temperature of the lubricating oil from the first target temperature T t1 to the second target temperature T obtained by adding the first temperature deviation ΔT1 thereto t2 (T t2 = T t1 + ΔT1). In this case, the control unit 90 controls the first temperature control device 41 and the second temperature control device 42 so that the temperature of the lubricating oil becomes the second target temperature T t2 . Next, it proceeds to step ST15.

[0052] In step ST15, the control unit 90 stands by until the next temperature acquisition timing. Specifically, the control unit 90 stands by until the measured value t of the temperature acquisition timer started in step ST11 becomes equal to or greater than a given time threshold td. When the condition t ≥ td is satisfied, it returns to step ST11. The time threshold td can be, for example, 0.5 minutes or more and 10 minutes or less. Thereafter, steps ST11 to ST15 are repeated.

[0053] <<Embodiment 2>>

[0054] Embodiment 2 of the present disclosure will be described. The structure of the temperature sensor system of the compression device 10 in this embodiment is different from that of the above-described Embodiment 1. Hereinafter, the points different from the above-described Embodiment 1 will be mainly described.

[0055] As Figure 3 shown, the compression device 10 of this embodiment includes a plurality of first bearing temperature sensors 81 and a plurality of second bearing temperature sensors 82.

[0056] A plurality (two in this example) of first bearing temperature sensors 81 are provided near the axle box 31 that houses the bearing 30 corresponding to one roller 20A, or near the axle box 31 at the shaft portion 22 of one roller 20A. Each first bearing temperature sensor 81 detects the temperature of the bearing 30 corresponding to one roller 20A, or the temperature of the shaft portion 22 of one roller 20A. The first bearing temperature sensor 81 can be a non-contact temperature sensor or a contact temperature sensor. The temperature data detected by the first bearing temperature sensor 81 is sent to the control unit 90.

[0057] A plurality (two in this example) of second bearing temperature sensors 82 are provided near the axle box 31 that houses the bearing 30 corresponding to the other roller 20B, or near the axle box 31 at the shaft portion 22 of the other roller 20B. Each second bearing temperature sensor 82 detects the temperature of the bearing 30 corresponding to the other roller 20B, or the temperature of the shaft portion 22 of the other roller 20B. The second bearing temperature sensor 82 can be a non-contact temperature sensor or a contact temperature sensor. The temperature data detected by the second bearing temperature sensor 82 is sent to the control unit 90.

[0058] Based on the data sent from the first roller temperature sensor 61, the second roller temperature sensor 62, the first bearing temperature sensor 81, and the second bearing temperature sensor 82, the control unit 90 controls the operations of the first temperature control device 41 and the second temperature control device 42.

[0059] Next, for an example of a method for controlling the temperature of the lubricating oil, reference is made to Figure 4 for description.

[0060] First, in step ST21, the control unit 90 acquires the roller center temperature T CE . The roller center temperature T CE of one roller 20A can be acquired using the first roller temperature sensor 61. The roller center temperature T CE of the other roller 20B can be acquired using the second roller temperature sensor 62. In addition, after the control unit 90 acquires the roller center temperature T CE , the temperature acquisition timer for measuring the elapsed time is started. Next, proceed to step ST22.

[0061] In step ST22, the control unit 90 calculates the second temperature deviation ΔT2. The second temperature deviation ΔT2 is the difference between the roller center temperature T CE and the third target temperature T t3 (ΔT2 = T CE - T t3 ). The third target temperature T t3 is used as the target temperature of the lubricating oil supplied to each bearing 30. The third target temperature T t3It may also be the average value of the central temperatures T of the respective rollers 20A and 20B. Next, proceed to step ST23. CE

[0062] In step ST23, the control unit 90 determines whether the absolute value of the second temperature deviation ΔT2 is greater than the second threshold value Th2. When the absolute value is greater than the second threshold value Th2, proceed to step ST24. On the other hand, when the absolute value is less than or equal to the second threshold value Th2, proceed to step ST25. Further, when the absolute value is less than or equal to the second threshold value Th2, the control unit 90 controls the first temperature control device 41 and the second temperature control device 42 so that the temperature of the lubricating oil becomes the third target temperature T t3

[0063] In step ST24, the control unit 90 performs target value correction. Specifically, the control unit 90 corrects the target temperature of the lubricating oil from the third target temperature T t3 to the fourth target temperature T obtained by adding the second temperature deviation ΔT2 thereto t4 (T t4 = T t3 + ΔT2). In this case, the control unit 90 controls the first temperature control device 41 and the second temperature control device 42 so that the temperature of the lubricating oil becomes the fourth target temperature T t4 . Next, proceed to step ST25.

[0064] In step ST25, the control unit 90 stands by until the next temperature acquisition timing. Specifically, the control unit 90 stands by until the measured value t of the temperature acquisition timer started in step ST21 becomes equal to or greater than a given time threshold value td, and when the condition t ≥ td is satisfied, returns to step ST21. The time threshold value td may be, for example, 0.5 minutes or more and 10 minutes or less. Thereafter, steps ST21 to ST25 are repeated.

[0065] <Footnote>

[0066] The following technology is disclosed by the description of the above embodiment.

[0067] (Technology 1)

[0068] A compression device, comprising:

[0069] A compression roller having a roller main body portion and a shaft portion, and compressing a battery electrode plate by the roller main body portion;

[0070] A circulating oil supply type bearing capable of rotatably supporting the shaft portion; and

[0071] A temperature control device is connected to the bearing via a pipe, and controls the temperature of the bearing by supplying lubricating oil whose temperature has been adjusted to the bearing.

[0072] The temperature control device is configured to adjust the temperature of the lubricating oil such that the difference between the temperature of the lubricating oil and the target oil temperature determined based on the central temperature of the roller is equal to or less than a first threshold value. The central temperature of the roller is the temperature of the central region of the roller main body.

[0073] (Technology 2)

[0074] The compression device according to Technology 1, wherein

[0075] The temperature control device is configured to adjust the temperature of the lubricating oil to the first target temperature when the difference between the central temperature of the roller and the first target temperature is equal to or less than the first threshold value.

[0076] The temperature control device is configured to adjust the temperature of the lubricating oil to a second target temperature obtained by adding the difference between the central temperature of the roller and the first target temperature to the first target temperature when the difference between the central temperature of the roller and the first target temperature exceeds the first threshold value.

[0077] (Technology 3)

[0078] A compression device includes:

[0079] A compression roller having a roller main body and a shaft portion, and compressing a battery plate through the roller main body;

[0080] A circulation oil supply type bearing that rotatably supports the shaft portion; and

[0081] A temperature control device is connected to the bearing via a pipe, and controls the temperature of the bearing by supplying lubricating oil whose temperature has been adjusted to the bearing.

[0082] The temperature control device is configured to adjust the temperature of the lubricating oil such that the difference between the temperature of the shaft portion or the bearing and the target oil temperature determined based on the central temperature of the roller is equal to or less than a second threshold value. The central temperature of the roller is the temperature of the central region of the roller main body.

[0083] (Technology 4)

[0084] The compression device according to Technology 2, wherein

[0085] The temperature control device is configured to adjust the temperature of the lubricating oil to the third target temperature when the difference between the central temperature of the roller and the third target temperature is equal to or less than the second threshold value.

[0086] The temperature control device is configured to: when the difference between the central temperature of the roller and the third target temperature exceeds the second threshold value, adjust the temperature of the lubricating oil to a fourth target temperature obtained by adding the difference between the central temperature of the roller and the third target temperature to the third target temperature.

[0087] (Technology 5)

[0088] The compression device according to any one of Technologies 1 to 4, wherein

[0089] The target oil temperature is the temperature of the central region of the roller main body.

[0090] (Technology 6)

[0091] The compression device according to any one of Technologies 1 to 4, wherein

[0092] The target oil temperature is the temperature obtained by adding a given value to the temperature of the central region of the roller main body.

[0093] Although the present invention has been described with respect to the preferred embodiments at the current time point, such a disclosure should not be construed in a limiting manner. For those skilled in the art in the technical field to which the present invention pertains, various modifications and changes will surely be known by reading the above disclosure. Therefore, the appended claims should be construed to include all modifications and changes without departing from the true spirit and scope of the present invention.

[0094] Industrial applicability

[0095] The present disclosure can be used for a compression device.

[0096] Explanation of reference numerals

[0097] 10: Compression device

[0098] 20: Compression roller

[0099] 20A: One roller (upper roller)

[0100] 20B: The other roller (lower roller)

[0101] 21: Roller main body

[0102] 22: Shaft portion

[0103] 30: Bearing

[0104] 31: Axle box

[0105] 41: First temperature control device (temperature control device)

[0106] 42: Second temperature control device (temperature control device)

[0107] 50: Pipe

[0108] 61: First roller temperature sensor

[0109] 62: Second roller temperature sensor

[0110] 71: First oil temperature sensor

[0111] 72: Second oil temperature sensor

[0112] 81: First bearing temperature sensor

[0113] 82: Second bearing temperature sensor

[0114] 90: Control unit

[0115] 100: Plate.

Claims

1. A compression device, comprising: A compression roller having a roller main body portion and a shaft portion, and compressing a plate for a battery by the roller main body portion; A circulation oil supply type bearing that rotatably supports the shaft portion; and A temperature control device connected to the bearing via a pipe, and controlling the temperature of the bearing by supplying lubricating oil whose temperature has been adjusted to the bearing, The temperature control device is configured to: adjust the temperature of the lubricating oil so that the difference between the temperature of the lubricating oil and a target oil temperature determined based on the central temperature of the roller is equal to or less than a first threshold value, and the central temperature of the roller is the temperature of the central region of the roller main body portion.

2. The compression device according to claim 1, wherein The temperature control device is configured to: when the difference between the central temperature of the roller and a first target temperature is equal to or less than the first threshold value, adjust the temperature of the lubricating oil to the first target temperature, The temperature control device is configured to: when the difference between the central temperature of the roller and the first target temperature exceeds the first threshold value, adjust the temperature of the lubricating oil to a second target temperature obtained by adding the difference between the central temperature of the roller and the first target temperature to the first target temperature.

3. A compression device, comprising: A compression roller having a roller main body portion and a shaft portion, and compressing a plate for a battery by the roller main body portion; A circulation oil supply type bearing that rotatably supports the shaft portion; and A temperature control device connected to the bearing via a pipe, and controlling the temperature of the bearing by supplying lubricating oil whose temperature has been adjusted to the bearing, The temperature control device is configured to: adjust the temperature of the lubricating oil so that the difference between the temperature of the shaft portion or the bearing and a target oil temperature determined based on the central temperature of the roller is equal to or less than a second threshold value, and the central temperature of the roller is the temperature of the central region of the roller main body portion.

4. The compression device according to claim 3, wherein The temperature control device is configured to: when the difference between the central temperature of the roller and a third target temperature is equal to or less than the second threshold value, adjust the temperature of the lubricating oil to the third target temperature, The temperature control device is configured to: when the difference between the central temperature of the roller and the third target temperature exceeds the second threshold value, adjust the temperature of the lubricating oil to a fourth target temperature obtained by adding the difference between the central temperature of the roller and the third target temperature to the third target temperature.

5. The compression device according to claim 1 or 3, wherein The target oil temperature is the central temperature of the roller.

6. The compression device according to claim 1 or 3, wherein The target oil temperature is a temperature obtained by adding a given value to the central temperature of the roller.

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