Battery, battery pack and vehicle including same

Abstract

A battery according to the present invention comprises: a cell housing; an electrode assembly which is disposed in the cell housing, and which includes a first electrode having a first polarity, a second electrode having a polarity opposite to the first polarity, and a separator interposed between the first electrode and the second electrode; and a current-collecting plate disposed in the cell housing and electrically connected to the cell housing and the second electrode, wherein the current-collecting plate includes: an electrode coupling part electrically connected to the second electrode; a peripheral part electrically connected to the cell housing; and at least one bridge extending between the electrode coupling part and the peripheral part and connecting same, the at least one bridge including an adjustment part deformed in response to an applied force.

Description

Batteries, battery packs and vehicles containing them

[0001] The present invention relates to a battery, a battery pack, and a vehicle including the same, and more particularly, to a battery, a battery pack, and a vehicle including the same, which relates to a rechargeable secondary battery such as a lithium-ion secondary battery.

[0002] This application claims priority to Korean Patent Application No. 10-2024-0089202, filed July 5, 2024, the entire disclosure of which is incorporated herein by reference.

[0003] With the recent surge in demand for portable electronic devices such as laptops, video cameras, and mobile phones, and the full-scale development of electric vehicles, energy storage batteries, robots, and satellites, research into high-performance secondary batteries capable of repeated charging and discharging is actively underway.

[0004] Currently commercialized secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries are receiving attention due to their advantages such as having almost no memory effect compared to nickel-based secondary batteries, allowing free charging and discharging, a very low self-discharge rate, and high energy density.

[0005] These lithium-ion secondary batteries primarily use lithium oxide as a positive electrode active material and carbon-based materials as a negative electrode active material. Furthermore, the lithium-ion secondary battery comprises an electrode assembly comprising positive and negative electrode plates coated with positive and negative electrode active materials, respectively, with a separator interposed between them, and an outer case that accommodates and seals the electrode assembly together with an electrolyte.

[0006] Meanwhile, depending on the shape of the battery case, lithium-ion secondary batteries can be classified into pouch-type secondary batteries in which the electrode assembly is inserted into a pouch made of aluminum laminate sheet, and can-type secondary batteries in which the electrode assembly is inserted into a metal can. In addition, can-type secondary batteries can be further classified into cylindrical batteries and square batteries depending on the shape of the metal can. Such lithium-ion secondary batteries can be used as battery modules or battery packs in which multiple battery cells are densely configured by overlapping or stacking and electrically connected to each other to implement high voltage and high current.

[0007] FIGS. 1A to 1B are perspective views sequentially illustrating steps of inserting an electrode assembly combined with a current collector plate into a cell housing of a battery in a conventional battery, and FIG. 1C is a plan view illustrating a portion of a current collector plate in a conventional battery.

[0008] Referring to FIGS. 1A to 1C, a cylindrical battery (10) may include a negative electrode collector plate (16). The negative electrode collector plate (16) is electrically connected to the negative electrode of the electrode assembly (12) and, at the same time, is electrically connected to a metal can (cell housing) (14), so that the metal can (14) has the same potential as the negative electrode and can function as a negative terminal of the battery (10). The cylindrical battery (10) including the negative electrode collector plate (16) may be manufactured by a process of combining the negative electrode collector plate (16) to the electrode assembly (12) and then inserting it into the metal can (14).

[0009] It may be important that the negative current collector (16) and the electrode assembly (12) are concentrically coupled and share the same central axis. If the center of the negative current collector (16) and the center of the electrode assembly (12) are significantly misaligned, the negative current collector (16) may catch on or interfere with the metal can (14) during the process of inserting the electrode assembly (12) into the metal can (14), making insertion difficult. Even if the electrode assembly (12) is forcibly inserted in this state, the negative current collector (16), the electrode assembly (12), and / or the metal can (14) may be unintentionally deformed. In addition, if the outer diameter of the negative current collector (16) and the inner wall of the metal can (14) are not sufficiently closely adhered, welding between the two may become difficult or impossible. Nevertheless, in an actual process, it is very difficult to precisely align the respective centers of the negative current collector (16) and the electrode assembly (12).

[0010] The present invention was created in consideration of the above-described problems, and has as its primary purpose the provision of a battery, a battery pack, and an automobile including the same, wherein the current collector plate and the electrode assembly can be easily and firmly inserted into a cell housing even when the current collector plate and the electrode assembly are dislocated.

[0011] In addition, another object of the present invention is to provide a battery, a battery pack and a vehicle including the same, wherein the current collector plate is in substantially close contact with the cell housing, so that the current collector plate and the cell housing can be effectively joined (e.g., welded).

[0012] In addition, another object of the present invention is to provide a battery, a battery pack, and a vehicle including the same, which can effectively prevent deformation of the peripheral portion of the current collector plate even when the current collector plate and the electrode assembly are inserted into the cell housing in an eccentric state.

[0013] The technical problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention described below.

[0014] A battery according to the present invention comprises: a cell housing; an electrode assembly disposed within the cell housing, the electrode assembly comprising a first electrode having a first polarity, a second electrode having a polarity opposite to the first polarity, and a separator interposed between the first electrode and the second electrode; and a current collector plate disposed within the cell housing and electrically connected to the cell housing and the second electrode, the current collector plate comprising: an electrode coupling portion electrically connected to the second electrode; a peripheral portion electrically connected to the cell housing; and at least one bridge extending between the electrode coupling portion and the peripheral portion and connecting them, wherein the at least one bridge comprises a control portion configured to be deformed in response to an applied force.

[0015] Additionally, the polarity of the first electrode may be positive, and the polarity of the second electrode may be negative.

[0016] Additionally, the cell housing may have a cylindrical outer shape, and the peripheral portion of the current collector may have an annular shape.

[0017] Additionally, the radial outer surface of the above-mentioned peripheral portion may be in contact with the inner surface of the above-mentioned cell housing.

[0018] Additionally, the radial outer surface of the above periphery can be welded to the inner surface of the cell housing.

[0019] Additionally, the electrode joint may be positioned radially inward with respect to the peripheral portion.

[0020] The at least one bridge of the above collector plate may include a plurality of bridges, including a first bridge and a second bridge, each of which includes the control unit.

[0021] The first bridge and the second bridge may be positioned at opposite positions with respect to the center of the collector plate.

[0022] The control member of said at least one bridge may be configured to be deformed to change the length of said bridge in response to an applied force.

[0023] The above bridge can extend linearly along the radial direction of the above collector plate.

[0024] The above-mentioned adjusting member may have a bending shape that deviates from the radial direction of the above-mentioned bridge.

[0025] The above control member may be configured to fold in response to an applied force.

[0026] The above control member may include a notch to facilitate the folding action.

[0027] The peripheral portion of the above current collector plate may include a rigid reinforcement structure for reinforcing the rigidity of the peripheral portion.

[0028] The above rigid reinforcement structure can extend transversely with respect to the radial plane in which the current collector plate is oriented.

[0029] The above rigid reinforcement structure may include at least one annular wall protruding transversely with respect to the radial plane.

[0030] The above periphery has a planar surface oriented parallel to the radial plane, and the rigid reinforcement structure can define a deviation from the planar surface along a vertical direction perpendicular to the radial plane.

[0031] The electrode assembly may have a jelly roll structure in which the first electrode, the second electrode, and the separator interposed therebetween are all wound around a central axis extending transversely to a radial plane in which the current collector plate is oriented.

[0032] A battery pack according to the present invention includes a plurality of batteries according to the present invention.

[0033] A vehicle according to the present invention includes a battery pack according to the present invention as a power source.

[0034] According to the present invention, a battery, a battery pack, and a vehicle including the same can be provided, which can be easily and firmly inserted into a cell housing even when the current collector plate and the electrode assembly are eccentric to each other by including a control portion in the bridge of the current collector plate.

[0035] In addition, according to one aspect of the present invention, a battery, a battery pack, and a vehicle including the same can be provided, in which the bridge includes a control unit, so that the current collector plate is in substantially close contact with the cell housing, and the current collector plate and the cell housing can be effectively combined.

[0036] In addition, according to one aspect of the present invention, a battery, a battery pack, and a vehicle including the same can be provided, in which the peripheral portion of the current collector plate includes a rigid reinforcing structure, thereby effectively preventing deformation of the peripheral portion even when the current collector plate and the electrode assembly are inserted into the cell housing in an eccentric state.

[0037] The effects provided by the present invention are not limited to the above-described contents, and include various effects that can be clearly understood by those skilled in the art from the present specification and drawings.

[0038] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0039] Figures 1a and 1b are perspective views sequentially illustrating steps of inserting an electrode assembly combined with a current collector plate into a cell housing of a battery in a conventional battery.

[0040] Figure 1c is a plan view showing a portion of a current collector plate in a conventional battery.

[0041] FIG. 2 is a perspective view showing the overall appearance of a battery according to one embodiment of the present invention.

[0042] FIG. 3 is another perspective view showing the overall appearance of a battery according to another embodiment of the present invention.

[0043] FIG. 4 is a cross-sectional side view illustrating the overall structure of a battery according to one embodiment of the present invention.

[0044] FIG. 5 is a cross-sectional side view illustrating a portion of a battery according to one embodiment of the present invention.

[0045] FIG. 6 is a perspective view illustrating a current collector plate of a battery according to one embodiment of the present invention.

[0046] FIG. 7 is a side cross-sectional view illustrating a bridge of a current collector plate according to one embodiment of the present invention.

[0047] FIG. 8 is a side cross-sectional view illustrating a bridge of a current collector plate according to another embodiment of the present invention.

[0048] FIGS. 9 (a) to 9 (d) are cross-sectional side views showing examples of variations in the shape of the peripheral portion of a current collector plate according to various embodiments of the present invention.

[0049] FIG. 10 is a drawing illustrating a battery pack according to one embodiment of the present invention.

[0050] FIG. 11 is a drawing illustrating a vehicle according to one embodiment of the present invention.

[0051] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Before proceeding, it should be noted that the terms used in this specification and the appended claims are not limited to their general and dictionary meanings, but should be interpreted based on meanings and concepts consistent with the technical aspects of the present invention, and should be understood as appropriately defined by the inventors for the best explanation.

[0052] Accordingly, the embodiments described herein and the configurations depicted in the drawings represent only some of the most preferred embodiments of the present invention and do not fully represent all of the technical concepts of the present invention. Therefore, various equivalents and modifications are possible at the time of filing this application and are included in the present invention.

[0053] For different embodiments of the present invention, redundant descriptions of essentially identical or similar configurations may be omitted, and descriptions will be made focusing on major differences.

[0054] In this specification, unless otherwise stated, the Z-axis direction means the vertical direction, and the X-axis and Y-axis directions mean the horizontal direction perpendicular to the Z-axis.

[0055] The reference numerals used in this specification may overlap somewhat between FIGS. 1A to 1C and FIGS. 2 to 11. However, it should be understood that the components designated by the reference numerals used in FIGS. 1A to 1C and the components designated by the reference numerals used in FIGS. 2 to 11 represent different elements.

[0056]

[0057] FIG. 2 is a perspective view showing the overall appearance of a battery according to one embodiment of the present invention, FIG. 3 is another perspective view showing the overall appearance of a battery according to another embodiment of the present invention, FIG. 4 is a side sectional view showing the overall structure of a battery according to one embodiment of the present invention, FIG. 5 is a side sectional view showing a part of a battery according to one embodiment of the present invention, and FIG. 6 is a perspective view showing a current collector plate of a battery according to one embodiment of the present invention.

[0058] Referring to FIGS. 2 to 6, a battery (10) according to one embodiment of the present invention may include an electrode assembly (12), a cell housing (14), and a current collector (16). The battery (10) may be a secondary battery capable of being charged and discharged, and may be, for example, a cylindrical battery.

[0059] The electrode assembly (12) may include one or more first electrodes (121) and one or more second electrodes (122), and a separator (123) (or portions of one continuous separator (123)) may be interposed therebetween. The first electrode (121), the second electrode (122), and the separator (123) may be laminated to form a laminated structure. The first electrode (121) may have a first polarity, and the second electrode (122) may have a second polarity opposite thereto. For example, a long first electrode sheet and a long second electrode sheet may be laminated with one long separator sheet interposed therebetween, and then a spiral structure (also known as a “jelly roll” structure) may be formed by winding them around a central axis. Each electrode sheet may include an edge region (32) at an axial end that is not coated with an electrode active material, and a conductive tab (124) may be formed in this edge region. The edge region of the first electrode (121) may be located at the first axial end of the jelly roll, and the edge region of the second electrode (122) may be located at the opposite end. These edge regions (32) and / or tabs (124) are used to electrically connect the electrodes (121, 122) to other structures of the battery (10). This allows the positive and negative polarities of the electrodes to be electrically connected to the positive and negative terminals of the battery (10), respectively.

[0060] The cell housing (14) can accommodate an electrode assembly (12) therein. An opening (18) is formed in the cell housing (14), and the electrode assembly (12) can be inserted and accommodated through this opening (18). The cell housing (14) can have a closed end (20) at an opposite end of the opening (18). As shown in FIG. 2, a terminal (22) can be positioned at the center of the closed end (20). When the cell housing (14) is formed with the same potential as one of the electrodes and serves as a polarity terminal of the electrode, the terminal (22) located at the closed end (20) of the cell housing (14) can have an opposite polarity. The cell housing (14) can be formed of or include a conductive metal. Therefore, an insulator (not shown) may be provided along the boundary (24) between the terminal (22) and the remainder of the cell housing (14) at the closed end (20) to electrically insulate them from each other.

[0061] The current collector (16) can be electrically connected to both the cell housing (14) and the second electrode (122). The current collector (16) can be electrically (and physically) disposed between the cell housing (14) and the electrode assembly (12) including the second electrode (122). Through the current collector (16), the cell housing (14) can be electrically connected to the second electrode (122) of the electrode assembly (12).

[0062] The collector plate (16) may include a peripheral portion (26), an electrode coupling portion (28), and at least one bridge (30) connecting the peripheral portion (26) and the electrode coupling portion (28).

[0063] The peripheral portion (26) can be electrically connected to the cell housing (14). The peripheral portion (26) can be arranged along the edge of the collector plate (16).

[0064] The electrode joint (28) can be electrically connected to the second electrode (122) of the electrode assembly (12). For example, the electrode joint (28) can be welded at one or more welding points (W) to the tab (124) and / or the uncoated region (32) located at the axial end of the electrode assembly (12) as previously mentioned. In the embodiment illustrated in FIG. 5, the second electrode (122) can include an uncoated region (32) at the axial end where the electrode active material is not applied, and this uncoated region can be located adjacent to the current collector (16). The electrode joint (28) can be electrically connected (e.g., welded) to the uncoated region (32) of the second electrode (122). In this regard, the electrode joint (28) may include one or more lobes (29) defining a welding point (W), which may be welded to an uncoated area (32) of the second electrode (122).

[0065] Each bridge (30) can connect the peripheral portion (26) and the electrode coupling portion (28). More specifically, the bridge (30) can electrically connect the peripheral portion (26) and the electrode coupling portion (28). One end of each bridge (30) can be connected to the peripheral portion (26), and the other end can be connected to the electrode coupling portion (28).

[0066] The bridge (30) may include a control member (34). The control member (34) may be configured to be deformable. For example, the control member (34) may have a deformable shape. The control member (34) may be deformed when a force is applied from the outside. For example, when a force is applied to the bridge (30) from the peripheral portion (26), the shape of the control member (34) may be deformed.

[0067] The first electrode (121) may be an anode, and the second electrode (122) may be a cathode. Accordingly, the current collector plate (16) may be a cathode current collector plate.

[0068] The periphery (26) can be electrically and structurally joined to the cell housing (14) by welding. For example, the outer periphery of the periphery (26) and the inner periphery of the cell housing (14) can be welded to each other. "Welding" in this specification may include, for example, any one of laser welding, spot welding, or ultrasonic welding.

[0069] The periphery (26) may be arc-shaped. That is, the periphery (26) may define a circle or a portion of a circle. Meanwhile, the cell housing (14) may be a cylindrical can shape with a circular cross-section. In this case, the outer circumferential radius of the periphery (26) may be substantially equal to the inner circumferential radius of the cell housing (14).

[0070] The electrode coupling portion (28) may be positioned radially inward with respect to the periphery (26). That is, the periphery (26) may be positioned to surround the electrode coupling portion (28). In addition, each bridge (30) may connect the electrode coupling portion (28) and the periphery (26), and may, for example, extend radially between the electrode coupling portion (28) and the periphery (26). For example, as illustrated in FIG. 6, the bridge (30) may extend from a portion of the electrode coupling portion (28) between the protrusions (29). In the illustrated example, four protrusions (29) and four bridges (30) may be provided. However, in other configurations, more or fewer protrusions (29) and / or bridges (30) may be provided.

[0071] At least one bridge (30) of the collector plate (16) may be a plurality of bridges (30) including a first bridge and a second bridge, each of which includes a control unit (34). The first bridge and the second bridge may be arranged at opposite positions across the center of the collector plate (16).

[0072] The bridge (30) may include an elastic material.

[0073] The adjusting member (34) may be configured such that the length of each bridge (30) can be changed. The length of the bridge (30) may be understood as the distance from one end to the other. The adjusting member (34) may be deformed, for example, such that the length of the bridge (30) becomes shorter. In addition, the adjusting member (34) may be deformed such that the length of the bridge (30) becomes longer. When a force is applied to one bridge (30) and its length is reduced, the length of the bridge (30) arranged on the opposite side of the collector plate (16) may increase.

[0074] FIG. 7 is a side cross-sectional view illustrating a bridge of a current collector plate according to an embodiment of the present invention.

[0075] Referring to Fig. 7, the adjusting member (34) can define the bending shape of the corresponding bridge (30). In this way, deformation of the adjusting member (34) can be facilitated.

[0076] FIG. 8 is a side cross-sectional view illustrating a bridge of a current collector plate according to another embodiment of the present invention.

[0077] Referring to FIG. 8, the control member (34) may be configured to fold when force is applied. In this case, the control member (34) may be easily deformed into a more or less folded form depending on the external force. In addition, the control member (34) may include a folding guide member (36) that induces the folding motion. The folding guide member (36) may be defined, for example, by one or more notches formed in the control member (34).

[0078] Figures 9 (a) to (d) are cross-sectional side views showing various shapes of the peripheral portion of the current collector plate in various embodiments according to the present invention.

[0079] Referring to FIGS. 5 and 9, the peripheral portion (26) may include a rigidity reinforcing structure. This rigidity reinforcing structure preferably reinforces the rigidity of the peripheral portion (26). For example, when the adjusting portion (34) of the bridge (30) is deformed by an external force, the peripheral portion (26) preferably maintains its shape due to the rigidity reinforcing structure.

[0080] The periphery (26) of the current collector (16) can generally extend in a horizontal direction (i.e., in a radial direction perpendicular to the central longitudinal axis of the battery (10) that coincides with the winding axis of the electrode assembly (12) when the electrode assembly (12) is provided in a jelly roll structure). Accordingly, the rigid reinforcement structure can be a structure that extends in a direction different from the radial direction or in a direction transverse to the radial direction. For example, referring to the drawing, the central longitudinal axis can be parallel to the vertical or height direction (i.e., the Z-axis), and the rigid reinforcement structure can extend in a direction different from the horizontal plane (XY plane) orthogonal to the central longitudinal axis oriented in the vertical direction. For example, the rigid reinforcement structure can extend in the vertical direction, or along a direction inclined with respect to the vertical direction or the horizontal plane.

[0081] Referring to (a) of FIG. 9, for example, the peripheral portion (26) may have a rigid reinforcement structure in the form of a wall (38) that protrudes vertically or axially along the radially inner and outer portions of the peripheral portion (26), so that the peripheral portion (26) has an approximately 'U' shape. Referring to (b) of FIG. 9, for example, the peripheral portion (26) may have a rigid reinforcement structure including a wall (38) that extends vertically along the outer perimeter of the peripheral portion (26) similarly to (a) of FIG. 9, wherein the remaining radial surface (40) may be formed to slope upward as it goes radially inward of the peripheral portion (26). Referring to (c) of FIG. 9, for example, the peripheral portion (26) may have a rigid reinforcement structure that protrudes vertically, which may be positioned between the radially inner and outer portions of the peripheral portion (26). As illustrated in the drawing, the protruding structure can be defined as a shape in which the radial surface of the periphery (26) deviates from the horizontal plane and then returns again. The result of this deviation can be the formation of an upwardly convex protrusion (42) as illustrated in (c) of FIG. 9, and in another example (not illustrated), a downwardly convex protrusion can be formed. Referring to (d) of FIG. 9, for example, the periphery (26) can include a rigid reinforcement structure having a repetitive deviation (44), which can be, for example, a repeated bending away from the horizontal plane, and, for example, an upwardly convex protrusion adjacent to a downwardly convex protrusion can be formed.

[0082] According to the above-described embodiments of the present invention, the bridge (30) of the current collector (16) includes one or more adjusting parts (34), so that the current collector (16) and the electrode assembly (12) can be easily and firmly inserted into the cell housing (14) even when the central axes of the current collector (16) and the electrode assembly (12) are misaligned and do not coincide with each other. Specifically, even if the current collector (16) and the electrode assembly (12) are mutually coupled in an eccentric state and inserted into the cell housing (14) in this coupled state, the current collector (16) can be deformed to fit the cell housing (14) as one or more adjusting parts (34) are deformed, so that the current collector (16) can be relatively easily and stably inserted.

[0083] In addition, according to the above-described embodiments of the present invention, the collector plate (16) can be in contact with the cell housing (14) in a substantially close state, so that the collector plate (16) and the cell housing (14) can be effectively joined (e.g., welded) even when they are eccentric to each other.

[0084] In addition, due to the rigid reinforcement structure described at least partially above, even if the current collector (16) and the electrode assembly (12) are inserted into the cell housing (14) in a state of being eccentric to each other, deformation of the peripheral portion (26) can be effectively prevented.

[0085] Meanwhile, referring again to FIGS. 2, 3, and 5, the battery (10) according to the present invention may include a can lid (46). The can lid (46) may be coupled to the opening (18) of the cell housing (14). The can lid (46) may be positioned to cover the opening (18). The can lid (46) may be fitted into the opening (18) and may be welded to the cell housing (14). The can lid (46) may be positioned at the outermost end opposite the closed end (20) of the cell housing (14) and may form a part of the outer shape of the battery (10). In a conventional battery, the cell housing includes a beading portion and a crimping portion having a recessed shape, and the electrode assembly and the current collector plate are fixed by the beading portion and the crimping portion. However, the battery (10) according to the present invention may not include such a beading portion and a crimping portion. In the battery (10) according to the present invention, the electrode assembly (12) and the current collector plate (16) can be firmly and stably fixed without the beading portion and crimping portion of a conventional battery.

[0086] Meanwhile, although preferred embodiments of the battery (10) according to the present invention have been described above, the technical idea of ​​the present invention is not limited to these, and may also include a form in which any two or more of these are combined.

[0087] Figure 10 is a drawing illustrating a battery pack according to the present invention.

[0088] Referring to FIG. 10, a battery pack (BP) according to the present invention may include one or more batteries (10) according to the present invention.

[0089] A battery pack (BP) may include various components in addition to a battery (10). For example, components of a battery pack (BP) may include one or more of a battery management system (BMS), a bus bar, a pack case (PC), a relay, a current sensor, etc.

[0090] In the above example, the current collector plate (16) can function as a negative current collector plate by being electrically connected to the negative electrode of the battery (10). However, according to the present invention, the current collector plate (16) is not limited to a negative current collector plate, and may also be a positive current collector plate by being electrically connected to the positive electrode of the electrode assembly (12) of the battery (10).

[0091] Figure 11 is a drawing illustrating a vehicle according to the present invention.

[0092] Referring to FIG. 11, a vehicle (V) according to the present invention may include a battery pack (BP) according to the present invention. The vehicle (V) may be a hybrid vehicle or an electric vehicle, and a battery pack (BP) including one or more batteries (10) according to the present invention may be used as a power source for the vehicle (V). The vehicle (V) according to the present invention may further include various components in addition to the battery pack (BP). For example, the vehicle (V) according to the present invention may further include a body, a motor, a control device such as an electronic control unit (ECU), etc. in addition to the battery pack (BP).

[0093] As described above, the present invention has been described with reference to the attached drawings, focusing on preferred embodiments. However, it will be apparent to those skilled in the art that numerous obvious modifications can be made without departing from the scope of the present invention. Accordingly, the scope of the present invention should be construed as encompassing such numerous modifications by the appended claims.

[0094]

[0095] [Explanation of symbols]

[0096] 10: Battery

[0097] 12: Electrode assembly

[0098] 121: First electrode

[0099] 122: Second electrode

[0100] 123: Membrane

[0101] 124: Tab

[0102] 14: Cell housing

[0103] 16: Current collector board

[0104] 18: Opening

[0105] 20: Closed end

[0106] 22: Terminal

[0107] 24: Boundary

[0108] 26: Periphery

[0109] 28: Electrode joint

[0110] 29: Protrusion

[0111] 30: Bridge

[0112] 32: Uncoated area

[0113] 34: Control section

[0114] 36: Folding guide section

[0115] 38: Wall

[0116] 40: Radial surface

[0117] 42: Protrusion

[0118] 44: Deviation

[0119] 46: Can lead

[0120] BP: Battery Pack

[0121] PC: Pack Case

[0122] V: Car

Claims

1. Cell housing; An electrode assembly disposed within the cell housing, comprising a first electrode having a first polarity, a second electrode having a polarity opposite to the first polarity, and a separator interposed between the first electrode and the second electrode; and A current collector plate is disposed within the cell housing and is electrically connected to the cell housing and the second electrode, The above collector plate, An electrode coupling portion electrically connected to the second electrode; a peripheral portion electrically connected to the cell housing; and At least one bridge extending between the electrode joint and the peripheral portion and connecting them, A battery wherein at least one bridge includes a control member configured to deform in response to an applied force.

2. In paragraph 1, A battery wherein the polarity of the first electrode is positive and the polarity of the second electrode is negative.

3. In paragraph 1, The above cell housing has a cylindrical shape, A battery in which the peripheral portion of the above-mentioned current collector plate has a circular shape.

4. In paragraph 3, A battery in which the radial outer surface of the above-mentioned peripheral portion is in contact with the inner surface of the above-mentioned cell housing.

5. In paragraph 4, A battery in which the radial outer surface of the above-mentioned peripheral portion is welded to the inner surface of the above-mentioned cell housing.

6. In paragraph 3, A battery in which the above electrode joint is positioned radially inward with respect to the periphery.

7. In paragraph 1, At least one bridge of the above collector plate, A battery comprising a plurality of bridges, each of which includes a first bridge and a second bridge, each of which includes the above-described control unit.

8. In paragraph 7, A battery wherein the first bridge and the second bridge are positioned at opposite positions across the center of the collector plate.

9. In paragraph 1, A battery wherein the control member of at least one of the bridges is configured to change the length of the bridge in response to an applied force.

10. In paragraph 1, A battery in which the above bridge extends linearly along the radial direction of the above collector plate.

11. In paragraph 10, A battery wherein the above-mentioned adjusting member has a bending shape that deviates from the radial direction of the above-mentioned bridge.

12. In paragraph 1, A battery wherein the above control unit is configured to fold in response to an applied force.

13. In paragraph 12, A battery wherein the above control unit includes a notch to facilitate folding operation.

14. In paragraph 1, A battery in which the peripheral portion of the above-mentioned current collector plate includes a rigid reinforcement structure for reinforcing the rigidity of the peripheral portion.

15. In paragraph 14, The above rigid reinforcement structure is a battery that extends transversely with respect to the radial plane on which the current collector plate is oriented.

16. In paragraph 15, A battery wherein the above rigid reinforcement structure includes at least one annular wall protruding transversely with respect to the radial plane.

17. In paragraph 15, The above peripheral portion has a planar surface oriented parallel to the above radial plane, The above rigid reinforcement structure is a battery that defines a deviation from the above plane surface along a vertical direction perpendicular to the above radial plane.

18. In paragraph 1, The above electrode assembly is a battery having a jelly roll structure in which the first electrode, the second electrode, and the separator interposed therebetween are all wound around a central axis extending transversely with respect to a radial plane in which the current collector plate is oriented.

19. A battery pack comprising a plurality of batteries according to paragraph 1.

20. A vehicle including a battery pack as a power source according to Article 19.

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