Battery holder and battery module

Abstract

To provide a battery holder capable of fixing a battery at a predetermined position without providing a new cover on the outside of the battery holder, and a battery module including such a battery holder.SOLUTION: A battery holder according to an embodiment of the present technology includes a first component that surrounds a side surface of a battery disposition region in which a cylindrical battery is disposed, and a second component that surrounds a side surface of the first component. The first component includes a first member in which a plurality of through holes or a plurality of notches are formed. The second component is configured to come into contact with the battery disposition region via the plurality of through-holes or the plurality of notches.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present technology relates to a battery holder and a battery module. [Background technology]

[0002] The battery module is provided with a battery holder for holding multiple batteries in predetermined positions (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. WO2019 / 044069 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when multiple batteries are not fixed to a battery holder or fixed to a terminal plate (tab) by welding or other means, they can vibrate or rotate at their respective locations. Therefore, for example, when connecting multiple batteries to each other by wire bonding, misalignment of the batteries can result in bonding failure. Furthermore, to prevent misalignment of the batteries, it is necessary to provide a cover on the outside of the battery holder to secure the multiple batteries in a predetermined position. However, providing such a cover can affect the movement of the probes of the wire bonding machine. It is desirable to provide a battery holder that can secure batteries in a predetermined position without providing a cover on the outside of the battery holder, and a battery module equipped with such a battery holder. [Means for solving the problem]

[0005] A battery holder according to a first aspect of the present technology includes a first component surrounding a side surface of a battery placement area where a cylindrical battery is placed, and a second component surrounding a side surface of the first component. The first component has a first member having a plurality of through holes or a plurality of notches formed therein. The second component is configured to be able to come into contact with the battery placement area via the plurality of through holes or the plurality of notches.

[0006] A battery holder according to a second aspect of the present technology includes a first component and a second component that surround the side surfaces of a battery placement area where a cylindrical battery is placed. The second component is made of a material that is more flexible than the first component. The first component has a restricting portion that can restrict shear strain that occurs in the second component due to displacement of the cylindrical battery when the cylindrical battery is placed in the battery placement area.

[0007] A battery module according to a third aspect of the present technology includes a cylindrical battery and a battery holder that holds the cylindrical battery. The battery holder has a first part that surrounds the side of the cylindrical battery and a second part that surrounds the side of the first part. The first part has a first member that has multiple through holes or multiple notches formed therein. The second part contacts the cylindrical battery via the multiple through holes or multiple notches.

[0008] A battery module according to a fourth aspect of the present technology includes a cylindrical battery and a battery holder that holds the cylindrical battery. The battery holder has a first component and a second component that surround the side surfaces of the cylindrical battery. The second component is made of a material that is more flexible than the first component. The first component has a restricting portion that can restrict shear strain that occurs in the second component due to displacement of the cylindrical battery. [Effects of the Invention]

[0009] According to the battery holder of the first aspect of the present technology, the second component surrounding the side surface of the first component is configured to be able to contact the battery placement area through the multiple through-holes or multiple notches in the first component. Therefore, when a cylindrical battery is placed in the battery placement area, the second component can be partially in contact with the side surface of the cylindrical battery. This allows the cylindrical battery to be fixed in a predetermined position and further suppresses vibration and rotation of the cylindrical battery. Therefore, the battery can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder.

[0010] According to a battery holder according to a second aspect of the present technology, a first component surrounding the side of the battery placement area where a cylindrical battery is placed is provided with a restricting portion capable of restricting shear strain that occurs in a second component made of a material more flexible than the first component due to displacement of the cylindrical battery when the cylindrical battery is placed in the battery placement area. Therefore, when the cylindrical battery is displaced and shear strain occurs in the second component when the cylindrical battery is placed in the battery placement area, the restricting portion can restrict the shear strain. This reduces the amount of displacement of the cylindrical battery by the amount of shear strain restricted by the restricting portion. As a result, the second component can fix the cylindrical battery in a predetermined position and further suppress vibration and rotation of the cylindrical battery. Therefore, the battery can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder.

[0011] According to the battery module of the third aspect of the present technology, the second component surrounding the side surface of the first component is in contact with the cylindrical battery through the through-holes or notches of the first component, allowing the second component to partially contact the side surface of the cylindrical battery. This allows the cylindrical battery to be fixed in a predetermined position and further suppresses vibration and rotation of the cylindrical battery. Therefore, the battery can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder.

[0012] According to a battery module according to a fourth aspect of the present technology, a first component surrounding the side of a cylindrical battery is provided with a restricting portion capable of restricting shear strain that occurs in a second component made of a material more flexible than the first component due to displacement of the cylindrical battery. When the cylindrical battery is placed in the battery placement area, if the cylindrical battery is displaced and shear strain occurs in the second component, the restricting portion can restrict the shear strain. This reduces the amount of displacement of the cylindrical battery by the amount of shear strain restricted by the restricting portion. As a result, the second component can fix the cylindrical battery in a predetermined position and further suppress vibration and rotation of the cylindrical battery. Therefore, the battery can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram illustrating a perspective configuration example of a battery module according to an embodiment of the present technology. [Figure 2] FIG. 2 is a perspective view showing an example of the structure of the battery module of FIG. 1 in an exploded state. [Figure 3] Fig. 3(A) is a diagram showing a perspective configuration example of the window frame part of Fig. 2. Fig. 3(B) is a diagram showing a top surface configuration example of the window frame part of Fig. 3(A). [Figure 4] Fig. 4(A) is a diagram illustrating a perspective configuration example of the deformation section of Fig. 2. Fig. 4(B) is a diagram illustrating a top surface configuration example of the deformation section of Fig. 4(A). [Figure 5] Fig. 5(A) is a perspective view illustrating an example of the configuration of the holder main body part of Fig. 2. Fig. 5(B) is a view illustrating an example of the configuration of the top surface of the holder main body part of Fig. 5(A). [Figure 6] FIG. 6 is a diagram illustrating an example of a cross-sectional configuration of the battery module of FIG. [Figure 7] FIG. 7 is a perspective view showing a state in which the subassembly is about to be inserted into the holder main body. [Figure 8] FIG. 8 is a cross-sectional view showing a state in which the sub-assembly is about to be inserted into the holder main body. [Figure 9]FIG. 9 is a cross-sectional view showing the state when the sub-assembly begins to be inserted into the holder main body. [Figure 10] FIG. 10 is a cross-sectional view showing the state when the subassembly is being inserted into the holder main body. [Figure 11] Fig. 11(A) is a diagram showing an example of the vertical cross-sectional configuration of a convex portion generated in a deformed portion, and Fig. 11(B) is a diagram showing an example of shear strain and compressive stress generated in the convex portion of the deformed portion when the battery is displaced in the extension direction of the battery. [Figure 12] Fig. 12(A) is a diagram showing an example of the horizontal cross-sectional configuration of a convex portion generated in a deformation portion, and Fig. 12(B) is a diagram showing an example of shear strain and compressive stress generated in the convex portion of a deformation portion when a battery is rotated. [Figure 13] Fig. 13(A) is a diagram showing a modified perspective configuration of the window frame portion of Fig. 2. Fig. 13(B) is a diagram showing an example of the top surface configuration of the window frame portion of Fig. 13(A). [Figure 14] Fig. 14(A) is a diagram illustrating a modified perspective configuration of the holder main body portion of Fig. 2. Fig. 14(B) is a diagram illustrating an example of the top surface configuration of the holder main body portion of Fig. 14(A). [Figure 15] Fig. 15(A) is a diagram showing a modified perspective configuration of the window frame portion of Fig. 2. Fig. 15(B) is a diagram showing an example of the top surface configuration of the window frame portion of Fig. 15(A). [Figure 16] Fig. 16(A) is a diagram showing a modified perspective configuration of the window frame portion of Fig. 2. Fig. 16(B) is a diagram showing an example of the top surface configuration of the window frame portion of Fig. 16(A). [Figure 17] Fig. 17(A) is a diagram showing a modified perspective configuration of the window frame portion of Fig. 2. Fig. 17(B) is a diagram showing an example of the top surface configuration of the window frame portion of Fig. 17(A). [Figure 18] Fig. 18(A) is a diagram showing a modified perspective configuration of the window frame portion of Fig. 2. Fig. 18(B) is a diagram showing an example of the top surface configuration of the window frame portion of Fig. 18(A). [Figure 19] Fig. 19(A) is a diagram illustrating a modified perspective configuration of the deformation section of Fig. 2. Fig. 19(B) is a diagram illustrating an example of the top surface configuration of the deformation section of Fig. 19(A). [Figure 20] FIG. 20 is a perspective view illustrating a modified example of the battery module of FIG. [Figure 21] FIG. 21 is a perspective view showing an example of the developed configuration of the battery module of FIG. [Figure 22] FIG. 22 is a diagram showing a modified example of the cross-sectional configuration of the battery module of FIG. [Figure 23] FIG. 23 is a perspective view showing an example of the configuration of a battery pack including battery modules according to the above embodiment and its modified example. [Figure 24] FIG. 24 is a perspective view showing an example of the configuration of a battery unit that is contained in the battery pack of FIG. [Figure 25] FIG. 25 is a perspective view showing an example of the battery pack of FIG. 23 in an exploded state. [Figure 26] FIG. 26 is a perspective view showing another example of the developed configuration of the battery pack of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present technology will be described in detail with reference to the drawings.

[0015] (Embodiment) First, a battery holder 20 and a battery module 100 according to an embodiment of the present technology will be described. Fig. 1 shows an example of a perspective configuration of the battery module 100. Fig. 2 shows an example of an exploded perspective configuration of the battery module 100.

[0016] As shown in FIG. 1, the battery module 100 includes a battery 10 and a battery holder 20 that holds the battery 10. The battery 10 is a primary battery or a secondary battery. When the battery 10 is a secondary battery, the type of secondary battery is not particularly limited, but specifically, it may be a lithium-ion secondary battery that obtains battery capacity by absorbing and releasing lithium ions. The battery 10 has a first end face and a second end face that face each other, and a circumferential surface that connects the first end face and the second end face. The battery 10 is, for example, a cylindrical battery in which the first end face and the second end face extend in a direction facing each other. The battery 10 includes, for example, a positive electrode 11 (see FIG. 6 described later) provided on the first end face and a negative electrode 12 (see FIG. 6 described later) provided on the second end face. The positive electrode 11 and the negative electrode 12 are made of metal.

[0017] As shown in FIGS. 1 and 2, the battery holder 20 includes a window frame 21, a deformation portion 22, and a holder main body 23. The window frame 21 corresponds to a specific example of a "first component" according to an embodiment of the present disclosure. The deformation portion 22 corresponds to a specific example of a "second component" according to an embodiment of the present disclosure. The holder main body 23 corresponds to a specific example of a "third component" according to an embodiment of the present disclosure. FIG. 3(A) illustrates an exemplary perspective configuration of the window frame 21. FIG. 3(B) illustrates an exemplary top view configuration of the window frame 21. FIG. 4(A) illustrates an exemplary perspective configuration of the deformation portion 22. FIG. 4(B) illustrates an exemplary top view configuration of the deformation portion 22. FIGS. 4(A) and 4(B) illustrate exemplary configurations of the deformation portion 22 when removed from the battery holder 20. Fig. 5(A) shows an example of a perspective configuration of the holder main body 23. Fig. 5(B) shows an example of a top surface configuration of the holder main body 23. Fig. 6 shows an example of a cross-sectional configuration of the battery module 100.

[0018] The holder main body 23 holds the battery 10, the window frame 21, and the deformation portion 22. The holder main body 23 surrounds the side of the deformation portion 22. The holder main body 23 has a battery housing portion 23A and two arm housing portions 23B. The battery housing portion 23A is configured to be able to house the battery 10, a frame 21A (described below) of the window frame 21, and the deformation portion 22. The two arm housing portions 23B are configured to be able to house two arms 21B (described below) of the window frame 21.

[0019] The battery accommodating section 23A is, for example, recessed and has an opening on the top surface of the holder main body 23. The opening of the battery accommodating section 23A is formed on the top surface of the holder main body 23 and is, for example, circular. The two arm accommodating sections 23B are provided on the inner surface of the battery accommodating section 23A. Each arm accommodating section 23B forms an area (space) in which the arm 21B is arranged and is, for example, groove-shaped with an opening extending from the inner surface of the battery accommodating section 23A to the top surface of the holder main body 23. The opening of each arm accommodating section 23B is formed on the inner surface of the battery accommodating section 23A and on the top surface of the holder main body 23 and is, for example, rectangular and extending from the inner surface of the battery accommodating section 23A to the top surface of the holder main body 23.

[0020] The holder main body 23 further has a bottom 23C. The bottom 23C constitutes the bottom of the holder main body 23 (battery accommodating section 23A). The bottom 23C supports the battery 10, the window frame section 21, and the deformation section 22. A through-hole H4 that connects the battery accommodating section 23A to the outside space is formed in the bottom 23C, and the bottom 23C is ring-shaped. When the battery 10 is accommodated in the holder main body 23 (battery accommodating section 23A), the through-hole H4 is provided in a position facing all or part of the negative electrode 12 of the battery 10. The holder main body 23 is made of, for example, molded resin (a resin molded part).

[0021] The window frame portion 21 has a frame body 21A and an arm body 21B. The frame body 21A corresponds to a specific example of a "first member" or "frame body" according to an embodiment of the present disclosure. The arm body 21B corresponds to a specific example of a "second member" according to an embodiment of the present disclosure. The frame body 21A surrounds the side of a battery arrangement area 10A (battery arrangement space) in which the battery 10 is arranged. The battery arrangement area 10A is a rod-shaped area extending in the Z direction. When the battery 10 is arranged in the battery arrangement area 10A, the frame body 21A surrounds the side of the battery 10. The frame body 21A is disposed in a position facing the battery arrangement area 10A (battery 10) in the X and Y directions orthogonal to the Z direction. The Z direction corresponds to a specific example of a "first direction" according to an embodiment of the present disclosure. The X and Y directions correspond to specific examples of a "second direction" according to an embodiment of the present disclosure.

[0022] A plurality of through holes H1 are formed in the frame body 21A. The plurality of through holes H1 are arranged, for example, at equal intervals in the circumferential direction around the battery arrangement area 10A (batteries 10). The plurality of through holes H1 may also be arranged, for example, at unequal intervals in the circumferential direction around the battery arrangement area 10A (batteries 10). In this case, however, it is preferable that the portions of the circumferential surface of the frame body 21A where no through holes H1 are formed are smaller in size than the through holes H1.

[0023] The frame body 21A is configured as a mesh-like frame body that forms multiple through holes H1. The openings of each through hole H1 formed in the peripheral surface of the frame body 21A extend in a direction oblique to the Z direction. That is, the inner peripheral surface of each through hole H1 is configured with inner walls W1 that face each other in a direction that obliquely intersects with the circumferential direction of the peripheral surface of the frame body 21A, and inner walls W2 that face each other in a direction perpendicular to the circumferential direction of the peripheral surface of the frame body 21A, at positions offset by a predetermined offset from the circumferential direction of the peripheral surface of the frame body 21A. The frame body 21A has a shape and size that allows multiple protrusions 22A (see FIG. 6) to be formed on the deforming portion 22 when the deforming portion 22 is pressed against the frame body 21A. The term "pressing" refers to the deforming portion 22 being pressed against the frame body 21A by pressure applied from the outside (specifically, the holder main body 23). The height of the frame 21A in the Z direction is equal to or greater than half the height of the battery placement area 10A (battery 10) in the Z direction.

[0024] The frame 21A is provided with a bottom 21C that supports the battery 10 when the battery 10 is housed in the holder main body 23 (battery housing portion 23A). The bottom 21C is provided with a through-hole H2 at a location facing all or part of the negative electrode 12 of the battery 10. When the battery 10 is housed in the holder main body 23 (battery housing portion 23A), the negative electrode 12 of the battery 10 is visible through the through-hole H2 in the window frame portion 21 and the through-hole H4 in the holder main body 23.

[0025] The arm 21B is connected to the frame 21A. The arm 21B is connected to the end of the frame 21A in the Z direction. The arm 21B is connected to the end of the frame 21A in the Z direction that is farthest from the bottom 21C. The arm 21B is further arranged in a position facing the side of the deformation section 22, for example, as shown in FIG. 2. The portion of the arm 21B connected to the frame 21A (hereinafter referred to as the "connecting portion") extends, for example, in a direction away from the battery arrangement area 10A (battery 10). The portion of the arm 21B connected to the connecting portion extends in the extension direction (Z direction) of the battery arrangement area 10A. The window frame section 21 is made of, for example, molded resin (a resin molded part).

[0026] The deformation portion 22 surrounds the side surface of the window frame portion 21. The deformation portion 22 is configured to be able to contact the battery arrangement area 10A through the multiple through holes H1. The deformation portion 22 contacts the batteries 10 through the multiple through holes H1. The deformation portion 22 has a shape and flexibility that allows a portion of the deformation portion 22 to be pushed toward the battery arrangement area 10A (batteries 10) through the multiple through holes H1 and thereby reach the battery arrangement area 10A (batteries 10) when pressed against the window frame portion 21. The inner diameter of the deformation portion 22 (the inner diameter of the through hole H3) when removed from the battery module 100 is larger than the outer diameter of the frame body 21A. Therefore, the deformation portion 22 can be pressed by the holder main body portion 23 and come into contact with the window frame portion 21. The deformation portion 22 is positioned opposite the battery arrangement area 10A in the X and Y directions, which are orthogonal to the Z direction. The height of the deformation portion 22 in the Z direction is equal to or greater than half the height of the battery placement area 10A (battery 10) in the Z direction.

[0027] The deformation portion 22 is made of a cylindrical resin sheet. When the deformation portion 22 is removed from the battery holder 20, the cylindrical resin sheet that makes up the deformation portion 22 has both a flat inner circumferential surface S1 and a flat outer circumferential surface S2, as shown in FIGS. 4A and 4B. When the deformation portion 22 is attached to the battery holder 20, the cylindrical resin sheet that makes up the deformation portion 22 is pressed by the holder main body 23 and comes into contact with the window frame 21, as shown in FIG. 6. As a result, the cylindrical resin sheet that makes up the deformation portion 22 has multiple protrusions 22A on the inner circumferential surface S1 at locations corresponding to the multiple through holes H1, as shown in FIG. 6. The cylindrical resin sheet that makes up the deformation portion 22 is made of a material (e.g., silicone resin) that is more flexible than the window frame 21.

[0028] Fig. 7 is a perspective view showing the state in which subassembly 100A is about to be inserted into holder main body 23. Fig. 8 is a cross-sectional view showing the state in which subassembly 100A is about to be inserted into holder main body 23. Fig. 9 is a cross-sectional view showing the state when subassembly 100A begins to be inserted into holder main body 23. Fig. 10 is a cross-sectional view showing the state in which subassembly 100A is being inserted into holder main body 23.

[0029] 7 and 8, the subassembly 100A is a module made up of a window frame portion 21, a deformation portion 22 covering the side surface of a frame body 21A of the window frame portion 21, and a battery 10 inserted into the window frame portion 21. The diameter of the outer peripheral surface S2 of the deformation portion 22 in the subassembly 100A is smaller than the diameter of the inner peripheral surface S3 of the battery accommodating portion 23A of the holder main body 23. Therefore, when the arm 21B of the subassembly 100A and the arm accommodating portion 23B of the holder main body 23 are aligned and the subassembly 100A begins to be inserted into the holder main body 23, the deformation portion 22 in the subassembly 100A is pressed by the inner peripheral surface S3 of the holder main body 23 and comes into contact with the window frame portion 21 (bottom portion 21C), as shown in FIG. At this time, a part of the deformation portion 22 is pushed out toward the circumferential surface of the battery 10 through the plurality of through holes H1, and thereby reaches the circumferential surface of the battery 10.

[0030] 10 , for example, a portion of the deformation portion 22 is pushed out toward the circumferential surface of the battery 10 through the multiple through-holes H1, thereby generating multiple protrusions 22A in the deformation portion 22 at locations corresponding to the multiple through-holes H1. In this way, the pressing force from the holder main body 23 presses each of the protrusions 22A generated in the deformation portion 22 against the circumferential surface of the battery 10. As a result, the battery 10 is fixed in place by each of the protrusions 22A generated in the deformation portion 22.

[0031] The inner diameter of the deforming portion 22 (the inner diameter of the through-hole H3) when removed from the battery module 100 may be smaller than the outer diameter of the frame body 21A. In this case, when the deforming portion 22 is incorporated into the subassembly 100A, the elasticity of the deforming portion 22 causes a portion of the deforming portion 22 to be pushed into the through-holes H1 even without pressing force from the holder main body 23, thereby generating multiple protrusions 22A in the deforming portion 22 at locations corresponding to the multiple through-holes H1. Preferably, each of the protrusions 22A thus generated has a height such that the protrusions 22A do not protrude from the through-holes H1 when there is no pressing force from the holder main body 23. This reduces insertion resistance when inserting the subassembly 100A into the holder main body 23.

[0032] Fig. 11(A) shows an example of the vertical cross-sectional configuration of the convex portion 22A generated in the deformation portion 22. Fig. 11(B) shows an example of the shear strain and compressive stress generated in the convex portion 22A of the deformation portion 22 when the battery 10 is displaced in the extension direction (Z direction) of the battery 10.

[0033] For example, as shown in FIG. 11(B), when the battery 10 is displaced in the Z direction, each protrusion 22A experiences a frictional force between the top of the protrusion 22A and the circumferential surface of the battery 10, and a reaction force to this frictional force generates shear strain. At this time, the side surfaces of each protrusion 22A are pressed against the inner wall W1 of the frame 21A by the shear strain, which generates compressive stress on the side surfaces of each protrusion 22A. This compressive stress limits the shear strain generated in each protrusion 22A. In other words, the frame 21A functions as a limiting element that can limit the shear strain generated in each protrusion 22A. As a result, the shear strain generated in each protrusion 22A is smaller than the shear strain that would occur in the resin sheet in contact with the circumferential surface of the battery 10 if the frame 21A were not present. Therefore, the displacement of the battery 10 in the Z direction is reduced by the amount of shear strain limited by the frame 21A.

[0034] For example, as shown in FIG. 12(B), when the battery 10 is displaced in the rotational direction, each protrusion 22A experiences a frictional force between the top of each protrusion 22A and the circumferential surface of the battery 10, and a reaction force to this frictional force generates shear strain. At this time, each protrusion 22A is pressed against the inner wall W2 of the frame 21A by the shear strain, which generates compressive stress on the side surface of each protrusion 22A. This compressive stress limits the shear strain generated in each protrusion 22A. In other words, the frame 21A functions as a limiting element that can limit the shear strain generated in each protrusion 22A. As a result, the shear strain generated in each protrusion 22A is smaller than the shear strain that would occur in the resin sheet in contact with the circumferential surface of the battery 10 if the frame 21A were not present. Therefore, the amount of displacement of the battery 10 in the rotational direction is reduced by the amount of shear strain limited by the frame 21A.

[0035] Next, the effects of the battery holder 20 and the battery module 100 will be described.

[0036] In this embodiment, the deformation portion 22 surrounding the side surface of the window frame portion 21 is configured to be able to come into contact with the battery placement area 10A (battery 10) through the multiple through-holes H1 of the window frame portion 21. This allows the deformation portion 22 to partially come into contact with the side surface of the battery 10. As a result, the battery 10 can be fixed in a predetermined position, and vibration and rotation of the battery 10 can be suppressed. Therefore, the battery 10 can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0037] In this embodiment, the window frame 21 surrounding the side of the battery placement area 10A (battery 10) is provided with a restricting portion (frame 21A) that can restrict shear strain that occurs in the deforming portion 22, which is made of a material more flexible than the window frame 21, due to displacement of the battery 10. As a result, when the battery 10 is placed in the battery placement area 10A and the battery 10 is displaced, causing shear strain in the deforming portion 22, the restricting portion (frame 21A) can restrict the shear strain. This reduces the amount of displacement of the battery 10 by the amount of shear strain restricted by the restricting portion (frame 21A). As a result, the deforming portion 22 can fix the battery 10 in a predetermined position and further suppress vibration and rotation of the battery 10. Therefore, the battery 10 can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0038] In this embodiment, the deforming portion 22 has a shape and flexibility that allows a portion of the deforming portion 22 to be pushed toward the battery placement area 10A (battery 10) through the multiple through-holes H1 when pressed against the window frame portion 21, thereby reaching the battery placement area 10A (battery 10). This allows the deforming portion 22 to fix the battery 10 in a predetermined position and also suppress vibration and rotation of the battery 10. Therefore, the battery can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0039] In this embodiment, the deformation portion 22 is pressed by the holder main body 23 and comes into contact with the window frame 21. This allows the deformation portion 22 to fix the battery 10 in a predetermined position and also suppress vibration and rotation of the battery 10. Therefore, the battery can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0040] In this embodiment, the window frame 21 is provided with an arm 21B, and the holder main body 23 is provided with an arm housing 23B that houses the arm 21B. This allows the amount of rotational displacement of the window frame 21 to be regulated within the tolerance range between the arm 21B and the arm housing 23B. As a result, rotation of the battery 10 can be suppressed. Therefore, the battery can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0041] In this embodiment, the openings of each through-hole H1 formed on the circumferential surface of the frame body 21A extend in a direction oblique to the Z direction. This reduces vibration and rotation of the battery 10 by the amount that shear strain is restricted by the frame body 21A. Therefore, the battery 10 can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0042] In this embodiment, the Z-direction height of window frame portion 21 and deforming portion 22 is at least half the Z-direction height of battery 10. This reduces the insertion resistance caused by friction between deforming portion 22 and battery 10 when inserting battery 10 into holder main body 23, compared to when the Z-direction height of window frame portion 21 and deforming portion 22 is the same as the Z-direction height of battery 10. As a result, the ease of assembly of battery module 100 can be improved.

[0043] In this embodiment, the multiple through-holes H1 formed in the frame body 21A are arranged at equal intervals in the circumferential direction around the battery placement area 10A (battery 10), or are arranged at uneven intervals within a range in which the areas on the circumferential surface of the frame body 21A where no through-holes H1 are formed are smaller in size than the through-holes H1. This effectively reduces vibration and rotation of the battery 10. Therefore, the battery 10 can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0044] In this embodiment, the frame 21A is configured as a mesh-like frame with multiple through-holes H1, and has a shape and size that allows multiple protrusions 22A to be formed in the deforming portion 22 when the deforming portion 22 is pressed against the frame 21A. This allows the deforming portion 22 to fix the battery 10 in a predetermined position and also suppress vibration and rotation of the battery 10. Therefore, the battery can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0045] In this embodiment, the window frame 21 is a molded resin part, and the deforming portion 22 is made of a cylindrical resin sheet. As a result, when the deforming portion 22 is pressed against the window frame 21, a portion of the deforming portion 22 is pushed toward the battery placement area 10A (battery 10) through the multiple through-holes H1, thereby reaching the battery placement area 10A (battery 10). As a result, the deforming portion 22 can fix the battery 10 in a predetermined position and can also suppress vibration and rotation of the battery 10. Therefore, the battery can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0046] Next, modified examples of the battery holder 20 and the battery module 100 will be described.

[0047] (Variation A) In the above embodiment, window frame 21 may have four arms 21B, for example, as shown in Figures 13(A) and 13(B). In this case, holder main body 23 may have four arm housings 23B corresponding to the four arms 21B, for example, as shown in Figures 14(A) and 14(B). In this case, rotation of window frame 21 can be further suppressed compared to when window frame 21 has two arms 21B and holder main body 23 has two arm housings 23B.

[0048] (Variation B) In the above embodiment and Modification A, the openings of the through holes H1 formed on the peripheral surface of the frame body 21A may extend in a direction parallel to the Z direction, as shown in Figures 15(A) and 15(B), for example. In this case, it is easier to narrow the pitch of the multiple through holes H1 in the circumferential direction around the battery arrangement area 10A (battery 10) compared to the above embodiment. This makes it possible to further suppress the amount of displacement of the battery 10 in the rotational direction compared to the above embodiment.

[0049] (Variation C) In the above embodiment and Modification A, the openings of the through holes H1 formed on the peripheral surface of the frame body 21A may extend in a direction perpendicular to the Z direction and parallel to the direction around the outer periphery of the battery arrangement area 10A (batteries 10), as shown in Figures 16(A) and 16(B). In this case, it is easier to narrow the pitch of the multiple through holes H1 in the Z direction compared to the above embodiment. In this case, the displacement of the batteries 10 in the Z direction can be further suppressed compared to the above embodiment.

[0050] (Variation D) In the above embodiment and modifications A to C, the bottom portion 21C of the frame body 21A may be omitted, for example, as shown in Figures 17(A) and 17(B). Even in this case, as in the above embodiment and modifications A to C, the deforming portion 22 can fix the battery 10 in a predetermined position and further suppress vibration and rotation of the battery 10. Therefore, the battery can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0051] (Variation E) In the above-described modification C, for example, as shown in FIGS. 18(A) and 18(B), the bottom portion 21C of the holder frame 21A may be omitted, the ring-shaped portion at the bottom of the frame 21A may be omitted, and some of the through-holes H1 in the frame 21A may be replaced with multiple notches C. Even in this case, the frame 21A can function as a restricting portion capable of restricting shear strain occurring in each protrusion 22A. As a result, the battery 10 can be fixed in a predetermined position, and vibration and rotation of the battery 10 can be suppressed. Therefore, the battery 10 can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0052] In this modification, the multiple cutouts C are arranged, for example, at equal intervals in the circumferential direction around the battery placement area 10A (battery 10). The multiple cutouts C may also be arranged, for example, at unequal intervals in the circumferential direction around the battery placement area 10A (battery 10). In this case, however, it is preferable that the area on the circumferential surface of the frame 21A where the cutouts C are not formed be smaller than the size of the cutouts C. This effectively reduces vibration and rotation of the battery 10. Therefore, the battery 10 can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0053] (Variation F) In the above embodiment and variations A to E, when the deforming portion 22 is removed from the battery holder 20, the cylindrical resin sheet constituting the deforming portion 22 may have multiple protrusions 22B on its inner circumferential surface S1 at positions corresponding to the multiple through-holes H1, as shown in FIGS. 19(A) and 19(B). In this case, even when the difference between the diameter of the outer circumferential surface S2 of the deforming portion 22 in the subassembly 100A and the diameter of the inner circumferential surface S3 of the battery accommodating portion 23A of the holder main body 23 is small, or when the cylindrical resin sheet constituting the deforming portion 22 is made of a resin with relatively low flexibility, the multiple protrusions 22A formed on the multiple protrusions 22B of the deforming portion 22 can be pressed from the inner circumferential surface S3 of the holder main body 23 to reliably contact the side surfaces of the battery. As a result, the battery 10 can be fixed in a predetermined position and vibration and rotation of the battery 10 can be suppressed. Therefore, the battery 10 can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0054] (Variation G) In the above embodiment and modifications A to F, the height in the Z direction of the window frame portion 21 and the deformation portion 22 may be approximately the same as the height in the Z direction of the battery 10, for example, as shown in Figures 20 and 21. Figure 20 shows a modification of the perspective configuration of the battery module 100. Figure 21 shows an example of an exploded perspective configuration of the battery module 100.

[0055] In this case, when inserting the battery 10 into the holder main body 23, the insertion resistance due to the friction between the deformation portion 22 and the battery 10 increases, but the fixing force that fixes the battery 10 in place can also be increased, more effectively suppressing vibration and rotation of the battery 10. Therefore, the battery 10 can be fixed in place without providing an additional cover on the outside of the battery holder 20.

[0056] (Variation H) In the above embodiment and modifications A to G, for example, as shown in FIG. 22 , the through-hole H4 may be omitted from the bottom 23C of the holder main body 23, and the bottom 23C of the holder main body 23 may be closed. In this case, both the positive electrode 11 and the negative electrode 12 of the battery 10 are provided on the first end surface. Even when the through-hole H4 is omitted from the bottom 23C of the holder main body 23, the battery 10 can be fixed in a predetermined position, as in the above embodiment and modifications A to G, and vibration and rotation of the battery 10 can be suppressed. Therefore, the battery 10 can be fixed in a predetermined position without providing an additional cover on the outside of the battery holder 20.

[0057] (Application example) Fig. 23 shows an example of a perspective configuration of a battery pack 1000 including a battery module 100 (hereinafter simply referred to as "battery module 100") according to the first embodiment and its modifications. Fig. 24 shows an example of a perspective configuration of a battery unit 300 housed in the battery pack 1000. Fig. 25 shows an example of an exploded perspective configuration of the battery pack 1000.

[0058] 23 and 24, the battery pack 1000 includes an exterior case 200 and a battery unit 300 housed in the exterior case 200. As shown in FIG. 24, the battery unit 300 includes a plurality of battery modules 100, terminal boards 110 and 120, and a control board 130. A plurality of holder main bodies 23 may be integrated into a plurality of battery modules 100. The control board 130 is connected to the terminal boards 110 and 120, for example, and includes circuits that measure the voltage of the batteries and battery unit, detect the remaining capacity of the battery unit, and measure the current output from the battery unit to detect the presence or absence of an overcurrent.

[0059] 25, the exterior case 200 is composed of a lower case 220 and an upper case 230. The lower case 220 and the upper case 230 are stacked together to form a storage space for storing the battery unit 300. The exterior case 200 (for example, the lower case 220) is provided with an external terminal 210 connected to the control board 130. The battery unit 300 is connected to the external terminal 210 via the control board 130.

[0060] The multiple battery modules 100 are arranged such that the axial directions of the batteries 10 face in a common direction, as shown in Fig. 25 , for example. The terminal boards 110, 120 are arranged opposite each other with the multiple battery modules 100 between them. The terminal board 110 is arranged on one end side of each battery module 100, and the terminal board 120 is arranged on the other end side of each battery module 100. The multiple battery modules 100 are electrically connected via the terminal boards 110, 120.

[0061] When each battery 10 is a double-sided current collection type battery having a positive electrode 11 on one end and a negative electrode 12 on the other end, the plurality of battery modules 100 may be arranged such that the plurality of batteries 10 whose positive electrodes 11 face the terminal plate 120 side and the plurality of batteries 10 whose positive electrodes 11 face the terminal plate 110 side are alternately arranged, as shown in Fig. 25. In this case, the terminal plates 110, 120 are connected to the positive electrodes 11 and negative electrodes 12 of the plurality of battery modules 100 so that the plurality of battery modules 100 are connected in series.

[0062] When each battery 10 is a one-sided current collection type battery in which the positive electrode 11 and the negative electrode 12 are provided on one end side, the plurality of battery modules 100 may be arranged so that the positive electrode 11 and the negative electrode 12 face in a common direction, as shown in Fig. 26. In this case, for example, terminal boards 110 and 120 are arranged on the side of the plurality of battery modules 100 on which the positive electrode 11 and the negative electrode 12 are provided, with the terminal board 110 connected to the positive electrode 11 and the terminal board 120 connected to the negative electrode 12.

[0063] In this application example, the battery module 100 according to the first embodiment and its modified example is used in a battery pack 1000. As a result, when connecting multiple batteries 10 together by wire bonding, for example, the batteries 10 are less likely to shift position, thereby preventing bonding defects caused by the shifting of the batteries. Furthermore, there is no need to provide a new cover on the outside of the battery holder 20 to fix the multiple batteries 10 in a predetermined position. Therefore, there is no impact on the movement of the probes of the wire bonding machine.

[0064] Although the present technology has been described above using one embodiment, the present technology is not limited to the aspect described in the above embodiment, and various modifications are possible with respect to the present technology. The effects described in this specification are merely examples, and therefore the effects of the present technology are not limited to the effects described in this specification. Therefore, other effects may be obtained with respect to the present technology.

[0065] The present technology can also be configured as follows. <1> a first component that surrounds a side surface of a battery placement area in which the cylindrical battery is placed; a second part surrounding a side surface of the first part; Equipped with the first component has a first member having a plurality of through holes or a plurality of notches formed therein; The second component is configured to be able to come into contact with the battery arrangement area through the plurality of through holes or the plurality of cutouts. Battery holder. <2> The second component has a shape and flexibility that allows a portion of the second component to be pushed toward the battery arrangement area through the plurality of through holes or the plurality of cutouts when the second component is pressed against the first component, thereby allowing the second component to reach the battery arrangement area. <1> 2. The battery holder according to claim 1 . <3> a third part that surrounds a side surface of the second part and holds the first part and the second part together; The second component is pressed by the third component to contact the first component. <1> or <2> 2. The battery holder according to claim 1 . <4> The first component further includes a second component connected to the first component and disposed at a position facing a side surface of the second component. <3> 2. The battery holder according to claim 1 . <5> The third component has a receiving portion that receives the second member. <4> 2. The battery holder according to claim 1 . <6> the battery arrangement region is a bar-shaped region extending in a first direction, the first component and the second component are disposed at positions facing the battery arrangement area in a second direction perpendicular to the first direction, The opening of each of the through holes or each of the notches extends in a direction oblique to the first direction. <1> Or <5> 10. The battery holder according to claim 9, wherein: <7> the battery arrangement region is a bar-shaped region extending in a first direction, the first component and the second component are disposed at positions facing the battery arrangement area in a second direction perpendicular to the first direction, The opening of each of the through holes or each of the notches extends in a direction parallel to the first direction. <1> Or <5> 10. The battery holder according to claim 9, wherein: <8> the battery arrangement region is a bar-shaped region extending in a first direction, the first component and the second component are disposed at positions facing the battery arrangement area in a second direction perpendicular to the first direction, The opening of each of the through holes or each of the notches extends in a third direction that is perpendicular to the first direction and parallel to the direction around the outer periphery of the battery arrangement area. <1> Or <5> 10. The battery holder according to claim 9, wherein: <9> the battery arrangement region is a bar-shaped region extending in a first direction, The height of the first component and the second component in the first direction is equal to or greater than half of the height of the battery arrangement region in the first direction. <1> Or <8> 10. The battery holder according to claim 9, wherein: <10> The plurality of through holes or the plurality of cutouts are arranged side by side at equal intervals in the circumferential direction around the battery arrangement region, or are arranged side by side at unequal intervals within a range in which unformed portions of the plurality of through holes or the plurality of cutouts in the first component are smaller in size than the sizes of the respective through holes or the respective cutouts. <1> Or <9> 10. The battery holder according to claim 9, wherein: <11> the first member is configured by a mesh-like frame body that forms the plurality of through holes or the plurality of notches, the second component has a cylindrical shape with both an outer circumferential surface and an inner circumferential surface that are flat when removed from the battery holder; The frame has a shape and a size that can generate a plurality of protrusions on the second component when the second component is pressed against the frame. <10> 2. The battery holder according to claim 1 . <12> the second component has a plurality of protrusions on a surface facing the first component, The plurality of protrusions are configured to be able to come into contact with the battery arrangement region via the plurality of through holes or the plurality of cutouts. <1> Or <11> 10. The battery holder according to claim 9, wherein: <13> the first component is a resin molded component, The second part is made of a cylindrical resin sheet. <1> Or <12> 10. The battery holder according to claim 9, wherein: <14> The battery pack includes a first component and a second component that can surround a side surface of a battery placement area in which a cylindrical battery is placed, the second component is made of a material that is more flexible than the first component; The first component has a restricting portion that can restrict shear strain that occurs in the second component due to displacement of the cylindrical battery when the cylindrical battery is placed in the battery placement area. Battery holder. <15> The restricting portion is configured to include a mesh-like frame body, and is capable of restricting shear strain that occurs in the second component due to displacement of the cylindrical battery when the second component is in contact with the cylindrical battery via the mesh of the frame body. <14> 2. The battery holder according to claim 1 . <16> a third component that surrounds the restricting portion and the second component and holds the first component and the second component; The restricting portion is capable of restricting shear strain that occurs in the second component due to displacement of the cylindrical battery when the second component is pressed by the third component and in contact with the cylindrical battery. <15> 2. The battery holder according to claim 1 . <17> A cylindrical battery, a battery holder for holding the cylindrical battery; Equipped with The battery holder includes: a first part that surrounds the side surface of the cylindrical battery; a second part surrounding a side surface of the first part; and the first component has a first member having a plurality of through holes or a plurality of notches formed therein; The second component contacts the cylindrical battery through the plurality of through holes or the plurality of notches. Battery module. <18> A cylindrical battery, a battery holder for holding the cylindrical battery; Equipped with the battery holder has a first part and a second part that surround the side surfaces of the cylindrical battery; the second component is made of a material that is more flexible than the first component; The first component has a restricting portion that can restrict shear strain that occurs in the second component due to displacement of the cylindrical battery. Battery module. [Explanation of symbols]

[0066] 10...battery, 10A...battery placement area, 11...positive electrode, 12...negative electrode, 20...battery holder, 21...window frame portion, 21A...frame body, 21B...arm body, 21C...bottom portion, 22...deformation portion, 22A, 22B...convex portion, 23...holder main body portion, 23A...battery accommodating portion, 23B...arm body accommodating portion, 23C...bottom portion, 100...battery module, 100A...subassembly, 110, 120...terminal board, 130...control board, 200...external case, 210...external terminal, 220...lower case, 230...upper case, 300...battery unit, 1000...battery pack, C...notch, H1, H2, H3, H4...through hole, S1...inner surface, S2...outer surface, W1, W2...inner wall.

Claims

1. a first component that surrounds a side surface of a battery placement area in which the cylindrical battery is placed; a second part surrounding a side surface of the first part; Equipped with the first component has a first member having a plurality of through holes or a plurality of notches formed therein; The second component is configured to be able to come into contact with the battery arrangement area through the plurality of through holes or the plurality of cutouts. Battery holder.

2. The second component has a shape and flexibility that allows a portion of the second component to be pushed toward the battery arrangement area through the plurality of through holes or the plurality of cutouts when the second component is pressed against the first component, thereby allowing the second component to reach the battery arrangement area. The battery holder according to claim 1 .

3. a third part that surrounds a side surface of the second part and holds the first part and the second part; The second component is pressed by the third component to come into contact with the first component.

3. The battery holder according to claim 1.

4. The first component further includes a second component connected to the first component and disposed at a position facing a side surface of the second component.

4. The battery holder according to claim 3.

5. The third component has a receiving portion that receives the second member.

5. The battery holder according to claim 4.

6. the battery arrangement region is a bar-shaped region extending in a first direction, the first component and the second component are disposed at positions facing the battery arrangement area in a second direction perpendicular to the first direction, The opening of each of the through holes or the notches extends in a direction oblique to the first direction.

3. The battery holder according to claim 1.

7. the battery arrangement region is a bar-shaped region extending in a first direction, the first component and the second component are disposed at positions facing the battery arrangement area in a second direction perpendicular to the first direction, The openings of the through holes or the notches extend in a direction parallel to the first direction.

3. The battery holder according to claim 1.

8. the battery arrangement region is a bar-shaped region extending in a first direction, the first component and the second component are disposed at positions facing the battery arrangement area in a second direction perpendicular to the first direction, The opening of each of the through holes or the notches extends in a third direction that is perpendicular to the first direction and parallel to a direction around the outer periphery of the battery arrangement area.

3. The battery holder according to claim 1.

9. the battery arrangement region is a bar-shaped region extending in a first direction, The height of the first component and the second component in the first direction is equal to or greater than half of the height of the battery arrangement region in the first direction.

3. The battery holder according to claim 1.

10. The plurality of through holes or the plurality of cutouts are arranged side by side at equal intervals in the circumferential direction around the battery arrangement region, or are arranged side by side at unequal intervals within a range in which unformed portions of the plurality of through holes or the plurality of cutouts in the first component are smaller in size than the sizes of the respective through holes or the respective cutouts.

3. The battery holder according to claim 1.

11. the first member is configured by a mesh-like frame body that forms the plurality of through holes or the plurality of notches, the second component has a cylindrical shape with both an outer circumferential surface and an inner circumferential surface that are flat when removed from the battery holder; The frame has a shape and a size that can generate a plurality of protrusions on the second component when the second component is pressed against the frame. The battery holder of claim 10.

12. the second component has a plurality of protrusions on a surface facing the first component, The plurality of protrusions are configured to be able to come into contact with the battery arrangement region via the plurality of through holes or the plurality of cutouts. The battery holder according to claim 1 .

13. the first component is a resin molded component, The second part is made of a cylindrical resin sheet. The battery holder according to claim 1 .

14. The battery pack includes a first component and a second component that can surround a side surface of a battery placement area in which a cylindrical battery is placed, the second component is made of a material that is more flexible than the first component; The first component has a restricting portion that can restrict shear strain that occurs in the second component due to displacement of the cylindrical battery when the cylindrical battery is placed in the battery placement area. Battery holder.

15. The restricting portion is configured to include a mesh-like frame body, and is capable of restricting shear strain that occurs in the second component due to displacement of the cylindrical battery when the second component is in contact with the cylindrical battery through the mesh of the frame body.

15. The battery holder of claim 14.

16. a third component that surrounds the restricting portion and the second component and holds the first component and the second component; The restricting portion is capable of restricting shear strain that occurs in the second component due to displacement of the cylindrical battery when the second component is pressed by the third component and in contact with the cylindrical battery.

16. The battery holder of claim 15.

17. A cylindrical battery, a battery holder for holding the cylindrical battery; Equipped with The battery holder includes: a first component that surrounds a side surface of the cylindrical battery; a second part surrounding a side surface of the first part; and the first component has a first member having a plurality of through holes or a plurality of notches formed therein; The second component contacts the cylindrical battery through the plurality of through holes or the plurality of notches. Battery module.

18. A cylindrical battery, a battery holder for holding the cylindrical battery; Equipped with the battery holder has a first part and a second part that surround the side surfaces of the cylindrical battery; the second component is made of a material that is more flexible than the first component; The first component has a restricting portion that can restrict shear strain that occurs in the second component due to displacement of the cylindrical battery. Battery module.

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