ELECTRODE STACK AND BATTERY

Abstract

The present disclosure provides an electrode stack having a detachment-resistant protective member disposed at a side portion, and a battery having the electrode stack that is resistant to interference between the bus terminal and the protective member and also has satisfactory structural efficiency. The electrode stack 10 of the disclosure is formed by stacking a plurality of preliminary electrode stacks 10'.The positions of the third and / or fourth side regions do not coincide in the direction in the plane of the electrode stack, (i) the protective component 20 extends at least partially between the third side region of the innermost preliminary electrode stack and the third side region of the outermost thereof, and / or (ii) the protective component extends at least partially between the fourth side region of the innermost preliminary electrode stack and the fourth side region of the outermost thereof.

Description

FIELD

[0001] The present disclosure relates to an electrode stack and a battery. BACKGROUND

[0002] Batteries with laminate films are known, which include a rectangular electrode stack, a collecting terminal arranged at a pair of opposite side portions of the electrode stack, and a laminate film sealing the electrode stack together with the collecting terminal, as disclosed in PTL 1.

[0003] A technique described in PTL 2 for this type of battery is to attach a protective component with a curable resin to a side portion where the collector terminal of the electrode stack is not located, in order to protect the side portions of the electrode stack. [CITATION LIST][PATENT LITERATURE] [PTL 1] Unexamined Japanese Patent Publication No. 2022-120699 [PTL 2] Unexamined Japanese Patent Publication No. 2021-114374 SUMMARY[TECHNICAL PROBLEM]

[0004] A protective component containing a curable resin may detach from the electrode stack, so that it can no longer adequately fulfill its function as a protective component.

[0005] To solve this problem, it was considered to anchor the electrode stack more firmly to the protective component by extending the protective component into the side area of the electrode stack where the collective terminal is located.

[0006] However, if the protective component extends to the side of the electrode stack where the bus terminal is located, interference between the bus terminal and the protective component may occur. To reduce such interference, it is necessary to leave more space between the bus terminal and the protective component, which, however, reduces the structural efficiency of the battery.

[0007] The present disclosure aims to provide an electrode stack having a protective member disposed at a side portion and resistant to peeling, and a battery having the electrode stack resistant to interference between the collecting terminal and the protective member and also having satisfactory structural efficiency. (SOLUTION OF THE PROBLEM)

[0008] The inventors have found that this goal can be achieved by the following means. <Gesichtspunkt 1>

[0009] Electrode stack which is rectangular and has a first side region in which a protective component with a curable resin is arranged, and a second side region opposite the first side region, and a third side region and a fourth side region opposite the third side region, wherein the electrode stack is formed by stacking a plurality of preliminary electrode stacks, wherein the locations of the third and / or fourth side regions of the plurality of preliminary electrode stacks do not coincide with each other in the direction in the plane of the electrode stacks, wherein (i) the protective component extends at least partially between the third side region of the innermost preliminary electrode stack and the third side region of the outermost preliminary electrode stack, and / or wherein (ii) the protective member extends at least partially between the fourth side region of the innermost preliminary electrode stack and the fourth side region of the outermost preliminary electrode stack. <Aspekt 2>

[0010] The electrode stack according to aspect 1, wherein: the protective component extends only partially between the third side region of the innermost preliminary electrode stack and the third side region of the outermost preliminary electrode stack, and / or, the protective component extends only partially between the fourth side region of the innermost preliminary electrode stack and the fourth side region of the outermost preliminary electrode stack. <Aspekt 3>

[0011] The electrode stack according to aspect 1 or 2, wherein: the distance between the third side region of the innermost preliminary electrode stack and the third side region of the outermost preliminary electrode stack is 0.5 mm or more and 2.0 mm or less, and / or, the distance between the fourth side region of the innermost preliminary electrode stack and the fourth side region of the outermost preliminary electrode stack is 0.5 mm or more and 2.0 mm or less amounts.<Gesichtspunkt 4>

[0012] A battery that has the following: an electrode stack according to one of the aspects 1 to 3, Collective terminals arranged on the third and fourth side areas of the electrode stack, and a laminate film that seals the electrode stack together with the collecting terminals. [ADVANTAGEOUS EFFECTS OF THE INVENTION]

[0013] According to the disclosure, it is possible to provide an electrode stack having a protective member disposed at a side portion that is resistant to peeling, and a battery having the electrode stack that is resistant to interference between the collecting terminals and the protective member and also has satisfactory structural efficiency. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a schematic plan view as an example of an electrode stack of the disclosure seen from above in the stacking direction (top side) and a schematic plan view as an example of an electrode stack of the disclosure seen from below in the stacking direction (bottom side). Fig. 2 shows a schematic plan view as an example of an electrode stack of a comparative example seen from above in the stacking direction (top side) and a schematic plan view as an example of an electrode stack of a comparative example seen from below in the stacking direction (bottom side). Fig. 3 is a simplified cross-sectional view showing an example of an electrode stack according to the disclosure. Fig. 4 shows a schematic plan view as an example of a battery of the disclosure in the stacking direction of the electrode stack seen from above (top side) and a schematic plan view as an example of a battery of the disclosure in the stacking direction of the electrode stack seen from below (bottom side). Fig. 5 shows a schematic plan view as an example of a battery of a comparative example in the stacking direction of the electrode stack seen from above (top side) and a schematic plan view as an example of a battery of the comparative example in the stacking direction of the electrode stack seen from below (bottom side). DESCRIPTION OF THE EMBODIMENTS

[0014] An embodiment of the disclosure will now be described in detail with reference to the accompanying drawings. However, the disclosure is not limited to the embodiment described below, and various modifications may be made without departing from the gist of the disclosure. The dimensional relationships in the drawings do not correspond to the actual dimensional relationships.

[0015] In the Fig. In the examples shown in Figures 1 to 5, the electrode stack 10 consists of two preliminary electrode stacks 10', but the number of preliminary electrode stacks 10' is not limited to two. <elektrodenstapel>

[0016] As in Fig. 1, the electrode stack 10 of the disclosure has a first side region (S1) in which a protective component 20 with a curable resin is arranged, a second side region (S2) opposite the first side region, and a third side region (S3) and a fourth side region (S4) opposite the third side region, and its shape is rectangular. As shown in Fig. 3, the electrode stack 10 of the disclosure is formed by stacking a plurality of preliminary electrode stacks 10'. In the electrode stack 10 of the disclosure, the positions of the third and / or fourth side regions (S3, S4) of the plurality of preliminary electrode stacks 10' do not match in the in-plane direction of the electrode stack 10, (i) the protective member 20 extends at least partially between the third side region (SI 3) of the innermost preliminary electrode stack 10' and the third side region (SO 3) of the outermost preliminary electrode stack 10', and / or (ii) the protective member 20 extends at least partially between the fourth side region (SI 4) of the innermost preliminary electrode stack 10' and the fourth side region (SO 4) of the outermost preliminary electrode stack 10'.

[0017] As already mentioned, a protective component 20 containing a curable resin may detach from the electrode stack 10, resulting in it no longer being able to adequately fulfill its function as a protective component 20.

[0018] In this context, the inventors focused on the fact that in an electrode stack 10 formed from a plurality of electrode stacks 10', each electrode stack 10' is shifted in the in-plane direction, and the present disclosure was developed on this basis. In particular, it was found that if a protective component 20 extends at least partially between the third and / or fourth side regions of the innermost preliminary electrode stack 10' and the third and / or fourth side regions of the outermost preliminary electrode stack 10', detachment of the protective component 20 from the electrode stack 10 is effectively prevented.

[0019] This is assumed because wrapping the protective member 20 up to the third and / or fourth side regions of any preliminary electrode stack 10' other than the outermost preliminary electrode stack 10' results in a stronger anchoring to the electrode stack 10.

[0020] Fig. 1 to 5 show examples in which the electrode stack 10 is composed of two preliminary electrode stacks 10'. In these drawings, the side region of the electrode stack on the side where the positive electrode collecting terminal 31 is arranged is the third side region (S3), and the side region of the electrode stack on the side where the negative electrode collecting terminal 32 is arranged is the fourth side region (S4) for convenience. The third side region (S3) is shown at the edges of the positive electrode collecting terminal 31 on the sides of the negative electrode collecting layer 15, the negative electrode active material layer 14, the electrolyte layer 13, and the positive electrode active material layer 12. Fig. 1 to 5 show examples in which the positive electrode active material layer 12 is formed smaller than the negative electrode active material layer 14, so that the positions of the individual layers of the electrode stack 10 do not match in the in-plane direction on the fourth side region (S4). Fig. 1 and Fig. 2, the fourth side region (S4) is therefore shown at the edges of the negative electrode collecting terminal 32 on the side of the negative electrode active material layer 14. The fourth side region (S4) may also be the edge of another layer forming the electrode stack 10, e.g., the edge of the positive electrode collecting layer 11. The size of the positive electrode active material layer 12 may also be the same as the size of the negative electrode active material layer 14, and therefore, the positions of each of the layers in the in-plane direction forming the electrode stack 10 may also be consistent in the fourth side region (S4), similar to the third side region (S3).

[0021] In the Fig. 1 and Fig. 2 and in the Fig. 4 and Fig. 5, the dashed lines a, b, and c are imaginary lines representing positional relationships with respect to the third side region (SO 3) in the in-plane direction. Specifically, the dashed line "a" represents the position of the outermost preliminary electrode stack 10' in the in-plane direction of the third side region (SO 3), the dashed line "b" represents the position of the preliminary electrode stack 10' in the in-plane direction of the protective member extending to the third side region (SI 3), and the dashed line "c" represents the position of the innermost preliminary electrode stack 10' in the in-plane direction of the third side region (SI 3).

[0022] In other words, the dashed line "a" represents the position of the side region closest to the positive electrode bus terminal 31 among the side regions of the preliminary electrode stack 10' on which the positive electrode bus terminal 31 is arranged, the dashed line "b" represents the in-plane position of the protective member 20 extending to the side region of the preliminary electrode stack 10' on which the positive electrode bus terminal 31 is arranged, and the dashed line "c" represents the in-plane position of the side region farthest from the positive electrode bus terminal 31 among the side regions of the preliminary electrode stack 10' on which the positive electrode bus terminal 31 is arranged.

[0023] In the electrode stack 10 of the disclosure and the battery 1 as shown in Fig. 1 and Fig. 4, the dashed lines are aligned in the order of "a", "b", and "c" from the positive electrode bus terminal 31 side. That is, the in-plane position "a" at the side portion closest to the positive electrode bus terminal 31 among the side portions of the preliminary electrode stack 10' where the positive electrode bus terminal 31 is arranged is farther toward the positive electrode bus terminal 31 side than the in-plane position "b" of the protective member 20 extending to the side portion of the preliminary electrode stack 10' where the positive electrode bus terminal 31 is arranged.

[0024] In an electrode stack 10 and a battery 1 according to the comparative examples as shown in the Fig. 2 and Fig. 5, the dashed lines are aligned in the order of "b", "a", and "c" from the end side where the positive electrode collecting terminal 31 is arranged. That is, the in-plane position "b" of the protective member 20 extending to the side portion of the preliminary electrode stack 10' where the collecting terminal 31 is arranged is further toward the positive electrode collecting terminal 31 side than the in-plane position at the side portion closest to the positive electrode collecting terminal 31 among the side portions of the preliminary electrode stack 10' where the positive electrode collecting terminal 31 is arranged.

[0025] For an electrode stack according to the specifications in the Fig. 2 and Fig. In the comparative examples shown in Figure 5, it can also be expected to prevent the protective component from detaching from the electrode stack. However, as already mentioned, a battery with such an electrode stack faces the problem of interference between the bus terminals and the protective component.

[0026] The present inventors have developed this disclosure after discovering that by using an electrode stack and a battery as described in the Fig. 1 and Fig. 4, it is possible to prevent the protective component from detaching from the electrode stack and at the same time to reduce the interference between the collecting terminals and the protective component.

[0027] In the electrode stack 10 of the disclosure, the positions of the third and / or fourth side portions of the plurality of preliminary electrode stacks 10' do not coincide in the in-plane direction of the electrode stack 10. That is, when the electrode stack 10 is viewed from the side portion where the protective component is disposed, each preliminary electrode stack 10' is shifted in the in-plane direction.

[0028] In the electrode stack 10 of the disclosure, (i) the protective component 20 extends at least partially between the third side region (Si 3) of the innermost preliminary electrode stack 10' and the third side region (So 3) of the outermost preliminary electrode stack 10', and / or (ii) the protective component 20 extends at least partially between the fourth side region (Si 4) of the innermost preliminary electrode stack 10' and the fourth side region (So 4) of the outermost preliminary electrode stack 10'.

[0029] That is, with respect to (i) the Fig. 1, the protective component 20 does not extend to the third side region (So 3) of the preliminary electrode stack 10' on the upper side, but the protective component 20 extends to the third side region (Si 3) of the preliminary electrode stack 10' on the lower side.

[0030] Fig. 1 shows a state in which the protective member 20 is provided only up to the part that coincides with the in-plane position of the fourth side region (Si 4) of the innermost preliminary electrode stack 10', but the protective member 20 may also extend at least partially between the fourth side region (Si 4) of the innermost preliminary electrode stack 10' and the fourth side region (So 4) of the outermost preliminary electrode stack 10', similar to the third side region. This allows the aspect of (ii) to be realized.

[0031] In the electrode stack 10 of the disclosure, the protective component 20 may extend only partially between the third side region (Si 3) of the innermost preliminary electrode stack 10' and the third side region (So 3) of the outermost preliminary electrode stack 10', and / or the protective component 20 may extend only partially between the fourth side region (Si 4) of the innermost preliminary electrode stack 10' and the fourth side region (So 4) of the outermost preliminary electrode stack 10'. With this type of construction, it is possible to reduce production costs if the protective component is arranged, for example, over the entire third and / or fourth side region.

[0032] If the electrode stack is formed from three or more preliminary electrode stacks, the protective component may extend to the third and / or fourth side regions of any preliminary electrode stack except for the outermost preliminary electrode stack.

[0033] The distance D between the third side region (Si 3) of the innermost preliminary electrode stack and the third side region (So 3) of the outermost preliminary electrode stack may be 0.5 mm or more and 2.0 mm or less, and / or the distance D between the fourth side region (Si 4) of the innermost preliminary electrode stack and the fourth side region (So 4) of the outermost preliminary electrode stack may be 0.5 mm or more and 2.0 mm or less. The distance D may be 0.5 mm or more, 0.6 mm or more, 0.7 mm or more, 0.8 mm or more, 0.9 mm or more, or 1.0 mm or more, and 2.0 mm or less, 1.8 mm or less, 1.6 mm or less, 1.4 mm or less, 1.2 mm or less, or 1.0 mm or less. If the distance D is within this range, it is easier to arrange the protective component at the desired location and thus effectively prevent the protective component from detaching from the electrode stack.The distance D may be the shortest distance between the third side region (Si 3) of the innermost preliminary electrode stack and an imaginary plane extending the third side region (So 3) of the outermost preliminary electrode stack in the vertical direction, or the shortest distance between the fourth side region (Si 4) of the innermost preliminary electrode stack and an imaginary plane extending the fourth side region (So 4) of the outermost preliminary electrode stack in the vertical direction.

[0034] The structure of the electrode stack of the disclosure will now be described.

[0035] As in Fig. 1, the electrode stack 10 of the disclosure has a first side region (S1) on which a protective member 20 comprising a curable resin is disposed, and a second side region (S2) opposite the first side region, as well as a third side region (S3) and a fourth side region (S4) opposite the third side region, and its shape is rectangular.

[0036] As in Fig. 3, the electrode stack 10 is formed by stacking a plurality of preliminary electrode stacks 10'. The electrode stack 10 may include a positive electrode collection layer 11, a positive electrode active material layer 12, an electrolyte layer (separator layer) 13, a negative electrode active material layer 14, and a negative electrode collection layer 15 in this order.

[0037] The term "preliminary electrode stack" used herein refers to a stack including the negative electrode active material layer 14, the electrolyte layer 13, the positive electrode active material layer 12, and the positive electrode collecting layer 11 in this order on both sides of the negative electrode collecting layer 15. In other words, a preliminary electrode stack is a stack including a positive electrode active material layer, a positive electrode active material layer, an electrolyte layer, a negative electrode active material layer, a negative electrode collecting layer, a negative electrode active material layer, an electrolyte layer, a positive electrode active material layer, and a positive electrode collecting layer in this order.The term "electrode stack" refers to a stack formed by stacking positive electrode collecting layers 11 of the plurality of preliminary electrode stacks 10' in contact with each other, or to a stack formed by stacking a positive electrode collecting layer 10 shared by preliminary electrode stacks 10'.

[0038] The preliminary electrode stack may also include layers other than those mentioned above. For example, it may include a carbon layer between the positive electrode collector layer and the positive electrode active material layer.

[0039] If the shapes of the individual parts of the layers constituting the electrode stack are rectangular in the in-plane direction, it is possible to form a rectangular electrode stack. The shapes of the parts of the positive electrode collecting layer and the negative electrode collecting layer of the electrode stack extending from the side regions are not particularly limited, and any suitable shape can be used to facilitate connection to the collecting terminals, as described below. <Verfahren zur Herstellung von Elektrodenstapeln>

[0040] The method of the disclosure for producing an electrode stack comprises the following steps: stacking a plurality of preliminary electrode stacks to form an electrode stack such that the positions of the third and / or fourth side regions do not match each other in the in-plane direction, coating the first and second side regions of the electrode stack with a curable resin such that the end of the curable resin on the third side region side is arranged between the third side region of the innermost preliminary electrode stack and the third side region of the outermost preliminary electrode stack, and curing the curable resin to provide a protective component, and / or: coating the first and second side regions of the electrode stack with a curable resin,so that the end of the curable resin is located on the side of the fourth side region between the fourth side region of the innermost preliminary electrode stack and the fourth side region of the outermost preliminary electrode stack, and curing the curable resin to provide a protective component.

[0041] In this method, the curable resin may penetrate into the third and / or fourth side region of any preliminary electrode stack other than the outermost preliminary electrode stack, and after curing, the protective component may be applied at the desired location to obtain an electrode stack according to the disclosure.

[0042] In order to more reliably arrange the protective component on the third and / or fourth side region of any preliminary electrode stack other than the outermost preliminary electrode stack, the curable resin may be applied and cured directly onto the third and / or fourth side region of the desired preliminary electrode stack. <batterie>

[0043] Fig. 4 shows a schematic plan view as an example of a battery of the disclosure from above in the stacking direction of the electrode stack (top side), and a schematic plan view as an example of a battery of the disclosure from below in the stacking direction of the electrode stack (bottom side). As in Fig. 4, the battery 1 of the disclosure includes an electrode stack 10 of the disclosure, collecting terminals 30 disposed at the third and fourth side portions of the electrode stack, and a laminate film 40 sealing the electrode stack 10 together with the collecting terminals 30.

[0044] Fig. 5 shows a schematic plan view as an example of a battery of a comparative example of the disclosure, viewed from above in the stacking direction of the electrode stack (top side), and a schematic plan view as an example of a battery of the comparative example of the disclosure, viewed from below in the stacking direction of the electrode stack (bottom side). When the protective member 20 extends to the side regions of the outermost preliminary electrode stack, in which the collecting terminals 30 are arranged to more firmly anchor the electrode stack 10 and the protective member 20, the collecting terminals 30 and the protective member 20 may interfere with each other, as shown above and below in FIG. Fig. 5 as an example. To reduce this overlap, it is necessary to provide more space between the bus terminals 30 and the protective component 20, which, however, reduces the structural efficiency of the battery.

[0045] In this context, the inventors have found that the problem can be solved by a battery having an electrode stack according to the disclosure.

[0046] This is believed to be because, in the electrode stack 10 of the disclosure, the protective member 20 is disposed further inward than the side portion of the outermost preliminary electrode stack 10', that is, the preliminary electrode stack 10' furthest from the bus terminal 30, on which the bus terminal 30 is disposed, so that the bus terminal 30 and the protective member 20 do not interfere with each other, and consequently, the battery does not require excessive space between the bus terminal 30 and the protective member 20.

[0047] The elements constituting the battery of revelation will now be described. <elektrodenstapel>

[0048] For an understanding of the electrode stack, reference is made to the above description of the electrode stack in the disclosure. <Schützendes Bauteil>

[0049] The protective component 20 is arranged on the first side region of the electrode stack 10 and the second side region opposite the first side region.

[0050] The protective component contains a curable resin. The curable resin is not particularly limited and can be, for example, a light-curing resin such as a UV-curing resin, an electron beam-curing resin, or a thermosetting resin. A curable resin can be a radical-polymerizing resin or a cationically polymerizable resin, or a combination thereof. <sammelanschluss>

[0051] The collecting terminal 30 is arranged on the third side region of the electrode stack 10 and the fourth side region opposite the third side region. The collecting terminal is electrically connected to the electrode stack via a current collector extending from the third and fourth side regions of the electrode stack. The current collector may be a bundle of sections of the positive electrode collecting layers of the electrode stack, with the other layers not laminated, or it may be a bundle of sections of the negative electrode collecting layers of the electrode stack, with the other layers not laminated.

[0052] The material of the collecting terminal is not particularly limited as long as it is a material with a current collecting function, and it can be, for example, the same metal material as the positive electrode collecting layer and the negative electrode collecting layer.

[0053] The shape and size of the collector terminal are not particularly restricted as long as the electrode stack can be sealed with the laminate film. <laminatfilm>

[0054] The laminate film 40 seals the electrode stack 10 together with the bus terminals 30. Specifically, the laminate film 40 may seal the electrode stack 10 together with the bus terminals 30 by wrapping the electrode stack 10 and the bus terminals 30 together. The laminate film 40 may also be composed of first and second films, wherein the first and second films may seal the electrode stack 10 together with the bus terminals 30 by superimposing the electrode stack 10 and the bus terminals 30 from the top and bottom in the stacking direction of the electrode stack 10. The laminate film may include a melt layer, a metal layer, and a resin layer, in this order in the thickness direction. <Restliche Konstruktion>

[0055] The battery of the disclosure may also include elements other than those mentioned above. For example, an insulating resin may be disposed on the side portion where the positive electrode bus terminal is located. EXAMPLES<Beispiel 1><Fertigung des Elektrodenstapels>

[0056] Two preliminary electrode stacks were fabricated in such a way that the side areas on which the collecting terminals were arranged did not coincide in the in-plane direction. This resulted in an electrode stack as shown in Fig. 3 shown. <Beschichtung mit aushärtbarem Harz>

[0057] A UV-curable resin was applied to the side regions where the collector terminals of the electrode stack were not located using a dispenser, in such a way that the end of the curable resin at the side region where the positive electrode collector terminal was located was located between the side region of the innermost preliminary electrode stack and the side region of the outermost preliminary electrode stack. <Platzierung des schützenden Bauteils>

[0058] A protective component was applied by irradiating the coated resin with ultraviolet rays to cure the resin. Thus, an electrode stack for Example 1 was obtained as shown in Fig. 1 shown. <Fertigung der Batterie>

[0059] Collective terminals were attached to the side portions of the resulting electrode stack where the protective component was not arranged, and the electrode stack and the collector terminals were sealed with a laminate film. Thus, a battery for Example 1 was obtained, as shown in Fig. 4 shown. <auswertung><Widerstand des schützenden Bauteils gegen Abschälen>

[0060] The protective component arranged on the electrode stack was evaluated for its peel strength based on the tensile stress acting on the side area where the positive electrode bus terminal was arranged when pulled from the end. Specifically, the rating was "VG" when the tensile stress was ≥ 200 N, "G" when the tensile stress was ≥ 50 N and < 200 N, and "P" when the tensile stress was < 50 N. <Störungen zwischen Sammelanschlüssen und schützendem Bauteil>

[0061] The presence or absence of interference between the bus terminals and the protective component in the battery was assessed. Specifically, the assessment was "No" if there was no contact between the bus terminals and the protective component on the electrode stack closest to the bus terminals, and "Yes" if there was contact with the protective component. <Vergleichendes Beispiel 1>

[0062] An electrode stack and a battery for Comparative Example 1 as shown in the Fig. 2 and Fig. 5 were prepared and evaluated in the same manner as in Example 1, except that the curable resin was coated up to the side portion of the outermost preliminary electrode stack where the positive electrode bus terminal was arranged. <Vergleichendes Beispiel 2>

[0063] An electrode stack and a battery for Comparative Example 2 were manufactured and evaluated in the same manner as in Example 1, except that in the coating with curable resin, the curable resin was coated further toward the inside of the innermost preliminary electrode stack than the side portion on which the positive electrode bus terminal was arranged, that is, no curable resin was coated on the side portion of a preliminary electrode stack on which the positive electrode bus terminal was arranged. <ergebnisse>

[0064] Table 1 shows the evaluation results for the resistance to detachment of the protective component and the overlap between the header terminals and the protective component. [Table 1]

[0065] As can be seen from Table 1, detachment of the protective component could be sufficiently prevented in the electrode stacks of the examples, while no interference between the collecting terminals and the protective component occurred in the batteries of the examples. LIST OF REFERENCE SYMBOLS 1 battery 10 electrode stacks 10' Preliminary electrode stack 11 Positive electrode collecting layer 12 Positive electrode active material layer 13 Electrolyte layer 14 Negative electrode active material layer 15 Negative electrode collecting layer 20 Protective component 30 Collective connection 31 Positive electrode collection connection 32 Negative electrode collection connection 40 laminate film QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 2022-120699

[0003] JP 2021-114374

[0003] < / ergebnisse> < / auswertung> < / laminatfilm> < / sammelanschluss> < / elektrodenstapel> < / batterie> < / elektrodenstapel>

Claims

[1] An electrode stack which is rectangular and has a first side region where a protective member comprising a curable resin is arranged, a second side region which is opposite to the first side region, and a third side region and a fourth side region which is opposite to the third side region, wherein the electrode stack is formed by stacking a plurality of preliminary electrode stacks, wherein the layers of the third and / or fourth side region of the plurality of preliminary electrode stacks do not match each other in the direction in the plane of the electrode stacks, wherein (i) the protective component extends at least partially between the third side region of the innermost preliminary electrode stack and the third side region of the outermost preliminary electrode stack, and / or wherein (ii) the protective member extends at least partially between the fourth side region of the innermost preliminary electrode stack and the fourth side region of the outermost preliminary electrode stack. [2] Electrode stack according to claim 1, wherein: the protective component extends only partially between the third side region of the innermost preliminary electrode stack and the third side region of the outermost preliminary electrode stack, and / or the protective component extends only partially between the fourth side region of the innermost preliminary electrode stack and the fourth side region of the outermost preliminary electrode stack. [3] Electrode stack according to claim 1, wherein: the distance between the third side region of the innermost preliminary electrode stack and the third side region of the outermost preliminary electrode stack is 0.5 mm or more and 2.0 mm or less, and / or the distance between the fourth side region of the innermost preliminary electrode stack and the fourth side region of the outermost preliminary electrode stack is 0.5 mm or more and 2.0 mm or less. [4] Battery with: an electrode stack according to one of claims 1 to 3, collecting terminals arranged on the third and fourth side regions of the electrode stack, and a laminate film that seals the electrode stack together with the collector terminals.

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