Printed battery and battery pack with perforated current collector

Abstract

The application discloses a printed battery with a perforated current collector and a battery pack, which comprises a substrate layer and a current collector layer, the substrate layer is provided with an opening area, the opening area is provided with conductive material, the conductive material is connected with the current collector layer and an additional current collecting layer, and the additional current collecting layer is located inside the substrate layer or on the side of the substrate layer far from the current collector layer. The application shortens the transmission distance of the charge between the printed thin film batteries, reduces the transmission resistance of the charge, and thus reduces the internal resistance of the battery pack, which is beneficial to large-current application scenarios.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a printed battery with perforated current collector and a battery pack. BACKGROUND

[0002] The printed thin film battery has flexibility, so it can be easily integrated with some flexible electronic devices without affecting the use comfort of the device. The shape of the thin film makes it have broad application prospects in the fields of intelligent packaging and wearable devices.

[0003] In the related art, when multiple printed thin film batteries are connected to form a battery pack, a tab carbon layer needs to be arranged on the side of the current collector of the printed thin film battery. The tab carbon layer is used as a connecting medium to connect the current collectors in the multiple printed thin film batteries horizontally. By arranging in this way, on the one hand, the horizontal transmission distance of the electric charge between the printed thin film batteries is far, and on the other hand, due to the use scenario of the printed thin film battery, the thickness of the tab carbon layer cannot be too thick, and the tab carbon layer is thin, which will cause the transmission resistance of the electric charge in the tab carbon layer to be large, thereby causing the internal resistance of the battery pack to be large, which is not conducive to the large current application scenario. SUMMARY

[0004] The main purpose of the present application is to provide a printed battery with perforated current collector and a battery pack, which aims to shorten the transmission distance of the electric charge between the printed thin film batteries, and reduce the transmission resistance of the electric charge, thereby reducing the internal resistance of the battery pack, which is conducive to the large current application scenario.

[0005] To achieve the above purpose, the present application provides a printed battery with perforated current collector, which comprises a substrate layer and a current collector layer. The substrate layer is provided with an opening area, and the opening area is provided with a conductive material. The conductive material connects the current collector layer and an additional current collecting layer. The additional current collecting layer is located inside the substrate layer or on the side of the substrate layer away from the current collector layer. The additional current collecting layer is used to connect the current collector layer of another printed thin film battery structure. The conductive material and / or the additional current collecting layer can be selected as metal paste or metal foil layer.

[0006] Optionally, the base layer comprises a first base layer and a second base layer, and the collector layer comprises a first collector layer and a second collector layer; the printed thin film battery structure further comprises a first electrode layer, a second electrode layer and an electrolyte diaphragm layer, and the first base layer, the first collector layer, the first electrode layer, the electrolyte diaphragm layer, the second electrode layer, the second collector layer and the second base layer are sequentially arranged, wherein the side of the first collector layer, the first electrode layer, the electrolyte diaphragm layer, the second electrode layer and the second collector layer is further coated with a first sealing layer; a metal grid layer is further arranged between the first base layer and the first collector layer, and the metal grid layer serves as the additional current collector layer of another printed thin film battery structure and is located outside the base layer.

[0007] Optionally, a second sealing layer formed of a sealing material is arranged in the first electrode layer and / or the second electrode layer; the second sealing layer is arranged to coat the first electrode layer and / or the second electrode layer, or part of the material of the first electrode layer and / or the second electrode layer is removed and the sealing material of the second sealing layer is filled; the second sealing layer is arranged on the same line as the center line of the opening area, and the opening area is located within the projection area of the electrolyte diaphragm layer on the first base layer / second base layer; the second sealing layer is used to prevent the electrolyte in the electrolyte diaphragm layer from penetrating into the opening area in the longitudinal direction; and the opening area is arranged in a dot matrix.

[0008] Optionally, the side of the opening area is provided with the conductive material, and the middle of the opening area is provided with the sealing material.

[0009] To achieve the above object, the application provides a battery pack comprising a first printed thin film battery and a second printed thin film battery, wherein the first printed thin film battery and the second printed thin film battery both adopt the printed battery with a perforated collector.

[0010] Optionally, the first collector layer of the first printed thin film battery and the second collector layer of the second printed thin film battery are connected by the conductive material to realize the series connection of the first printed thin film battery and the second printed thin film battery; the first printed thin film battery and the second printed thin film battery are connected in the longitudinal direction or the horizontal direction, and the first printed thin film battery and the second printed thin film battery can share the same base layer; when connected in the longitudinal direction, the first printed thin film battery and the second printed thin film battery are connected by the conductive material; and when connected in the horizontal direction, the first printed thin film battery and the second printed thin film battery are connected by the conductive material and the additional current collector layer.

[0011] Optionally, a plurality of the first printed thin film batteries and a plurality of the second printed thin film batteries are connected in series; the first tab layer is used to connect the first printed thin film battery and the second printed thin film battery located at the middle of the series connection to form a cuttable design; or the connecting carbon layer is used to connect the first printed thin film battery and the second printed thin film battery located at the middle of the series connection to form a foldable design.

[0012] Optionally, the first printed thin film battery and the second printed thin film battery are connected in parallel through the additional current collector layer between the two first current collector layers and the two second current collector layers; the first printed thin film battery and the second printed thin film battery are connected in series through the additional current collector layer between the first current collector layer and the second current collector layer; the first printed thin film battery and the second printed thin film battery share the same substrate layer.

[0013] Optionally, a plurality of the first printed thin film batteries and a plurality of the second printed thin film batteries are connected in series; the first printed thin film battery and the second printed thin film battery are connected in parallel through the additional current collector layer between the first current collector layer and the second current collector layer; the first printed thin film battery and the second printed thin film battery share the same substrate layer.

[0014] Optionally, when the additional current collector layer is located inside the substrate layer, the center lines of the opening areas of the first printed thin film battery and the second printed thin film battery are not on the same straight line.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] The present application sets an opening area on the substrate layer of the printed battery with a perforated current collector, uses the opening area as the perforated current collector; the opening area is provided with conductive material, and the conductive material is used to connect the current collector layer and the additional current collector layer; the conductive material in the opening area and / or the additional current collector layer are made of metal paste or metal foil layer with better conductivity, so that the transmission resistance of electric charge is greatly reduced, thereby reducing the internal resistance of the battery pack, which is beneficial to large current application scenarios. Moreover, because the metal paste or metal foil layer is separated from the electrolyte diaphragm layer / first electrode layer / second electrode layer by the current collector layer, the addition of the second sealing layer avoids longitudinal penetration of the electrolyte, and increases the horizontal penetration distance of the electrolyte, so that the metal paste or metal foil layer cannot contact the electrolyte or the electrode material, thereby avoiding mutual reaction.

[0017] The plurality of printed thin film batteries are combined to form a battery pack, wherein when the plurality of printed thin film batteries are connected in a transverse direction, the additional current collecting layer made of metal paste or metal foil layer reduces the resistance and thus reduces the internal resistance of the whole battery pack, and the open area of the dot matrix design can effectively collect charges without the additional current collecting layer in the current collecting layer; when the plurality of printed thin film batteries are connected in a longitudinal direction, the open area directly shortens the transmission distance of the charges, thereby reducing the internal resistance of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0019] Figure 1 It is an exploded structural schematic diagram of an embodiment of the printed thin film battery structure of the present application.

[0020] Figure 2 It is a structural schematic diagram of an embodiment of the printed thin film battery structure of the present application.

[0021] Figure 3 It is a structural schematic diagram of an embodiment of the printed thin film battery structure of the present application.

[0022] Figure 4 It is a structural schematic diagram of an embodiment of the printed thin film battery structure of the present application.

[0023] Figure 5 It is a structural schematic diagram of a series connection of an embodiment of the battery pack of the present application (arranged side by side).

[0024] Figure 6 It is a structural schematic diagram of a tailorable design of an embodiment of the battery pack of the present application.

[0025] Figure 7 It is a structural schematic diagram of a foldable design of an embodiment of the battery pack of the present application.

[0026] Figure 8 It is a structural schematic diagram of a parallel connection of an embodiment of the battery pack of the present application.

[0027] Figure 9 It is a structural schematic diagram of a combination of series connection and parallel connection of an embodiment of the battery pack of the present application.

[0028] Figure 10 It is a structural schematic diagram of an embodiment of the battery pack of the present application with a composite layer.

[0029] Figure 11 Fig. 2 is a schematic diagram of a structure with a composite layer for an embodiment of the battery of the present application;

[0030] Figure 12 Fig. 3 is a schematic diagram of a structure with a composite layer for an embodiment of the battery of the present application (series connection);

[0031] Figure 13 Fig. 4 is a schematic diagram of a structure with a composite layer for an embodiment of the battery of the present application (parallel connection);

[0032] Figure 14 Fig. 5 is a schematic diagram of a structure with a composite layer for an embodiment of the battery of the present application (combination of series and parallel connection).

[0033] The names of the components marked in the figures are as follows:

[0034]

[0035] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0036] The technical solutions in the present application will be described clearly and completely below with reference to the accompanying drawings in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0038] In addition, it should be noted that the description involving "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is also not within the scope of protection claimed by the present application.

[0039] The embodiment discloses a printed battery with a through-hole current collector and a battery pack, and refers to the accompanying drawings Figures 1-4 , comprising a substrate layer 1 and a current collector layer 2, the substrate layer 1 is provided with an opening area 3, the opening area 3 is provided with conductive material, the conductive material connects the current collector layer 2 and an additional current collector layer 4, the additional current collector layer 4 is located inside the substrate layer 1 or on the side of the substrate layer 1 away from the current collector layer 2; wherein the additional current collector layer 4 is used to connect the current collector layer 2 of another printed thin film battery structure; the conductive material and / or the additional current collector layer 4 can be selected as metal paste or metal foil layer, wherein the conductive material can be preferably provided by printing the current collector or the additional current collector together, that is, the same material is printed together when printing, and then the via hole reaches the inside of the opening or even penetrates through the substrate layer opening to reach the other side of the substrate layer.

[0040] The embodiment sets the opening area 3 on the substrate layer 1, uses the opening area 3 as a through-hole current collector; the opening area 3 is provided with conductive material, and the conductive material is used to connect the current collector layer 2 and the additional current collector layer 4, wherein the conductive material in the opening area 3 and / or the additional current collector layer 4 adopts metal paste or metal foil layer with better conductivity, so that the transmission resistance of the electric charge is greatly reduced, thereby reducing the internal resistance of the battery pack, which is beneficial to large-current application scenarios. Moreover, because the metal paste or metal foil layer is separated from the electrolyte diaphragm layer 7 / first electrode layer 5 / second electrode layer 6 by the current collector layer 2, and a second sealing layer 9 is further added to avoid longitudinal penetration of the electrolyte, and the horizontal penetration distance of the electrolyte is increased, the metal paste or metal foil layer cannot contact the electrolyte or the electrode material, thereby avoiding mutual reaction.

[0041] A plurality of printed thin film batteries are combined to form a battery pack, wherein when the plurality of printed thin film batteries are connected in the horizontal direction, the additional current collector layer 4 made of metal paste or metal foil layer reduces the resistance and thereby reduces the internal resistance of the entire battery pack, and the opening area 3 designed in the dot matrix can also effectively collect the electric charge without the additional current collector layer 4 in the current collector layer 2; when the plurality of printed thin film batteries are connected in the vertical direction, the opening area 3 directly shortens the transmission distance of the electric charge, thereby reducing the internal resistance of the battery pack.

[0042] Specifically, referring to the accompanying drawings Figures 1-2, the base layer 1 comprises a first base layer 101 and a second base layer 102, and the collector layer 2 comprises a first collector layer 201 and a second collector layer 202; the printed thin film battery structure further comprises a first electrode layer 5, a second electrode layer 6 and an electrolyte diaphragm layer 7, and the first base layer 101, the first collector layer 201, the first electrode layer 5, the electrolyte diaphragm layer 7, the second electrode layer 6, the second collector layer 202 and the second base layer 102 are sequentially arranged; wherein the side part of the first collector layer 201, the first electrode layer 5, the electrolyte diaphragm layer 7, the second electrode layer 6 and the second collector layer 202 is further coated with a first sealing layer 8, and the first sealing layer 8 is used to prevent the exosmosis of electrolyte; a metal grid layer is further arranged between the first base layer 101 and the first collector layer 201 as the negative electrode side, and the metal grid layer is used as an additional current collecting layer 4 of another printed thin film battery structure which is arranged outside the base layer; in this way, the printed thin film battery is formed by the combination of the sequentially arranged first base layer 101, the first collector layer 201, the first electrode layer 5, the electrolyte diaphragm layer 7, the second electrode layer 6, the second collector layer 202 and the second base layer 102, so as to meet the common printed thin film battery structure. In order to avoid the oxidation reaction between the additional current collecting layer 4 formed by the metal paste and the second collector layer 202 as the positive electrode side, the additional current collecting layer 4 is arranged only between the first collector layer 201 as the negative electrode side and the first base layer 101, so that the charge transport performance is improved without worrying about the damage of the printed thin film battery structure.

[0043] Specifically, referring to the accompanying drawings Figure 3, the second sealing layer 9 is arranged in the first electrode layer 5 and / or the second electrode layer 6, and the second sealing layer 9 is arranged on the center line of the opening area 3, and the opening area 3 is arranged in the projection area of the electrolyte diaphragm layer 7 on the first substrate layer 101 / second substrate layer 102; the second sealing layer 9 is used to prevent the electrolyte in the electrolyte diaphragm layer 7 from penetrating into the opening area 3 in the longitudinal direction, because the electrolyte needs to penetrate through the first / second current collector layer in the transverse direction, and the first / second current collector layer is thin and difficult to penetrate, and the penetration distance is relatively far. In this way, the electrolyte is prevented from penetrating into the opening area 3 in the longitudinal direction through the first / second electrode layer 5 / 6, so as to avoid the oxidation reaction between the electrolyte and the conductive material / extra current collector layer 4 formed by the metal paste and other adverse conditions. Arranging the opening area 3 in the projection area of the electrolyte diaphragm layer 7 on the first / second substrate layer 101 / 102 is also a measure to shorten the distance of charge transmission between the two printed thin film batteries. The opening area 3 is preferably arranged in a dot matrix, and the resistance is reduced through the extra current collector layer 4 inside or outside the substrate layer 1 after the opening area 3 is arranged. Compared with a strip or grid arrangement, the dot matrix arrangement can effectively prevent the electrolyte from penetrating.

[0044] Specifically, referring to the drawings Figure 4 The side part of the opening area 3 is provided with the conductive material, and the middle part of the opening area 3 is provided with the sealing material. In this way, when the opening range of the opening area 3 is too large, the conductive material can be arranged only in the side part of the opening area 3, and the sealing material is arranged in the middle part. Compared with the conductive material, the sealing material is relatively cheap in price, so as to save the conductive material. At the same time, arranging the sealing material in the middle part of the opening area 3 can further prevent the electrolyte from penetrating.

[0045] The embodiment also discloses a battery pack comprising a first printed thin film battery 11 and a second printed thin film battery 12, and the first printed thin film battery 11 and the second printed thin film battery 12 both adopt the printed battery with a perforated current collector in the above embodiment.

[0046] Specifically, the first current collector layer 201 of the first printed thin film battery 11 and the second current collector layer 202 of the second printed thin film battery 12 are connected through the conductive material, so as to realize the series connection of the first printed thin film battery 11 and the second printed thin film battery 12; wherein the first printed thin film battery 11 and the second printed thin film battery 12 are connected in the longitudinal direction or in the transverse direction.

[0047] When the longitudinal connection is adopted, the first printed thin film battery 11 and the second printed thin film battery 12 are connected through the conductive material. Specifically, as shown in FIG. 6, the first printed thin film battery 11 and the second printed thin film battery 12 are connected through the conductive material in the longitudinal direction. Figure 1 ,3 As shown in Figure 4, the first printed thin-film battery 11 is located above the second printed thin-film battery 12. The first current collector layer 201 of the first printed thin-film battery 11 is connected to the second current collector layer 202 of the second printed thin-film battery 12 via a metal grid layer (at this time, the metal grid layer of the first printed thin-film battery 11 also serves as an additional current collector layer 4 of the second printed thin-film battery 12) and the opening region 3. Since the polarities of the first electrode layer 5 and the second electrode layer 6 are opposite, the first printed thin-film battery 11 and the second printed thin-film battery 12 are connected in series. At this time, the first substrate layer 101 of the first printed thin-film battery 11 and the second substrate layer 102 of the second printed thin-film battery 12 can share the same substrate layer. In addition, when the first current collector layer 201 of the first printed thin-film battery 11 does not need to conduct charge laterally, since the charge is transferred longitudinally and the transmission distance is short, the metal grid layer can also be omitted and should also fall within the protection scope of this application.

[0048] When a lateral connection is used, the first printed thin-film battery 11 and the second printed thin-film battery 12 are connected through a conductive material and an additional current collector layer 4. Specifically, as shown in the attached diagram. Figure 5 As shown, the first printed thin-film battery 11 is located to the right of the second printed thin-film battery 12. The first current collector layer 201 of the first printed thin-film battery 11 passes sequentially through an additional current collector layer 4 disposed between the first current collector layer 201 and the first substrate layer 101, an opening region 3 of the first substrate layer 101, an additional current collector layer 4 disposed outside the substrate layer 1, and an opening region 3 of the second substrate layer 102 of the second printed thin-film battery 12 (at this time, the opening region can be disposed within the projection area of ​​the electrolyte separator layer, or it can extend to the first sealing layer to reach the outside), and finally connects to the second current collector layer 202 of the second printed thin-film battery 12. Since the polarities of the first electrode layer 5 and the second electrode layer 6 are opposite, the first printed thin-film battery 11 and the second printed thin-film battery 12 are connected in series. It should be noted that although the charge transmission distance is relatively long at this time, since the additional current collector layer 4 formed by metal paste and the opening region 3 are used as the transmission path, the internal resistance of charge transmission is relatively low, which can also achieve the purpose of reducing the internal resistance of the battery pack. At this time, the first substrate layer 101 of the first printed thin film battery 11 and the second substrate layer 102 of the second printed thin film battery 12 can share the same substrate layer, and the second substrate layer 102 of the first printed thin film battery 11 and the first substrate layer 101 of the second printed thin film battery 12 can share another substrate layer.

[0049] For details, please refer to the appendix. Figure 6(Fig. dotted line is the cutting line), including a number of series connected first printed thin film battery 11 and a number of second printed thin film battery 12; the first printed thin film battery 11 of the first collector layer 201 located at the series end is connected to the external second tab layer 1302 through the additional current collector layer 4, and the second printed thin film battery 12 of the second collector layer 202 is connected to the external third tab layer 1303 through the additional current collector layer 4; the first printed thin film battery 11 and the second printed thin film battery 12 located between the adjacent middle part of the series are connected to each other by the first tab layer 1301 to form a cuttable design. At this time, different voltage battery packs can be obtained by arbitrary cutting, so as to change flexibly according to the actual use.

[0050] Specifically, referring to the accompanying drawings Figure 7 (Fig. dotted line is the folding line, arrow is the folding direction), including a number of series connected first printed thin film battery 11 and a number of second printed thin film battery 12; the first printed thin film battery 11 of the first collector layer 201 located at the series end is connected to the external second tab layer 1302 through the additional current collector layer 4, and the second printed thin film battery 12 of the second collector layer 202 is connected to the external third tab layer 1303 through the additional current collector layer 4; the first printed thin film battery 11 and the second printed thin film battery 12 located between the adjacent middle part of the series are connected to each other by the first tab layer 1301 to form a cuttable design. At this time, different voltage battery packs can be obtained by arbitrary cutting, so as to change flexibly according to the actual use.

[0051] Specifically, as shown in the accompanying drawings Figure 8 The two first collector layers 201 of the first printed thin film battery 11 and the second printed thin film battery 12 and the two second collector layers 202 are connected by the additional current collector layer 4 to realize the parallel connection of the first printed thin film battery 11 and the second printed thin film battery 12. The following is the accompanying drawings Figure 8For example, the first printed thin film battery 11 and the second printed thin film battery 12 are arranged side by side, the first printed thin film battery 11 is located at the left side of the second printed thin film battery 12, the extra current collecting layer 4 between the first current collecting layer 201 and the first substrate layer 101 of the first printed thin film battery 11 is connected with the extra current collecting layer 4 between the first current collecting layer 201 and the first substrate layer 101 of the second printed thin film battery 12; the second current collecting layer 202 of the first printed thin film battery 11 and the second current collecting layer 202 of the second printed thin film battery 12 are connected in sequence through the opening area 3 of the second substrate layer 102 and the extra current collecting layer 4 outside the substrate layer 1, so as to realize the parallel connection of the first printed thin film battery 11 and the second printed thin film battery 12. At this time, the first substrate layer 101 of the first printed thin film battery 11 and the first substrate layer 101 of the second printed thin film battery 12 can share the same substrate layer, and the second substrate layer 102 of the first printed thin film battery 11 and the second substrate layer 102 of the second printed thin film battery 12 can share another substrate layer.

[0052] Specifically, referring to the accompanying drawings Figure 9 , including a plurality of first sub-battery groups connected in parallel, wherein the first sub-battery group is formed by the first printed thin film battery 11 and the second printed thin film battery 12 connected in series; or, including a plurality of second sub-battery groups connected in series, wherein the second sub-battery group is formed by the first printed thin film battery 11 and the second printed thin film battery 12 connected in parallel. In this way, considering the battery group composed of a plurality of printed thin film batteries, if the structure as shown in the accompanying drawings Figure 3 is adopted, it needs to be continuously stacked, resulting in a relatively thick overall thickness of the battery group; if the structure as shown in the accompanying drawings Figure 5 is adopted, it needs to be laid horizontally, resulting in a relatively large area occupied by the battery group, therefore, the present embodiment combines the accompanying drawings and the accompanying drawings, that is, a plurality of printed thin film batteries are connected in parallel and in series, so that the thickness and area of the combined battery group can be compromised.

[0053] As a preferred scheme of the above embodiment, referring to the accompanying drawings Figure 10When the additional current collector layer 4 is located inside the base layer 1, it is equivalent to the base layer 1 forming a composite layer 15 with the additional current collector layer 4 as an interlayer. The center lines of the opening regions 3 of the first printed thin-film battery 11 and the second printed thin-film battery 12 can be located on different straight lines. With this configuration, it is not necessary to require the opening regions 3 of the first printed thin-film battery 11 and the second printed thin-film battery 12 to be coaxially aligned. This reduces the processing precision required for the opening regions 3 of the first printed thin-film battery 11 and the second printed thin-film battery 12, while still ensuring effective electrical connection between them. In this case, the additional current collector layer 4 can be a metal foil layer or a dense layer composed of conductive polymers. The additional current collector layer 4 can be a single sheet of material without a design, or it can be a pre-die-cut material with a designed pattern.

[0054] As another embodiment of the above, refer to the appendix. Figure 11 A second sealing layer 9, formed of a sealing material, is provided in the first electrode layer 5 and / or the second electrode layer 6 to ensure that the electrolyte does not permeate through the first electrode layer 5 / second electrode layer 6 into the opening region 3; or, the opening region 3 is moved to a location outside the projection area of ​​the electrolyte membrane layer 7 of the first substrate layer 101 / second substrate layer 102. This extends the distance between the electrolyte membrane layer 7 and the opening region 3, ensuring that the electrolyte does not permeate into the opening region 3. This arrangement avoids adverse reactions such as oxidation between the electrolyte and the conductive material / additional current collector layer 4 formed of metal paste.

[0055] As another embodiment of the above, refer to the appendix. Figures 12-14 When multiple printed thin-film batteries are connected in series (as shown in the attached image) Figure 12 (as shown) or in parallel (as attached) Figure 13 (as shown) or connected in a combination of series and parallel (as attached) Figure 14 When (as shown), the composite layer 15 can be used as a connection medium between multiple printed thin-film batteries. In addition, a cut area 1501 can be provided on the composite layer 15 to form a tab structure. It should be noted that when the composite layer 15 connects two current collector layers 2 with the same polarity, the composite layer 15 should be die-cut to form a die-cut area 1502 to avoid short circuit accidents.

[0056] It should be noted that the printed thin-film battery structure and other contents of the battery pack disclosed in this invention are prior art and will not be described in detail here.

[0057] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. Any application of the present invention directly or indirectly in other related technical fields is included within the patent protection scope of the present invention.

Claims

1. A printed battery comprising a perforated current collector, characterized in that, It includes a substrate layer and a current collector layer. The substrate layer has an opening region that serves as a through-hole current collector. The opening region contains a conductive material that connects the current collector layer and an additional current collector layer. The additional current collector layer is located inside the substrate layer or on the side of the substrate layer away from the current collector layer. The substrate layer includes a first substrate layer and a second substrate layer, and the current collector layer includes a first current collector layer and a second current collector layer. The printed battery also includes a first electrode layer, a second electrode layer, and an electrolyte separator layer. The first substrate layer, the first current collector layer, the first electrode layer, the electrolyte separator layer, the second electrode layer, the second current collector layer, and the second substrate layer are sequentially arranged. The sides of the first current collector layer, the first electrode layer, the electrolyte separator layer, the second electrode layer, and the second current collector layer are further covered with a first sealing layer. A metal grid layer is also provided between the first substrate layer and the first current collector layer. The metal grid layer serves as an additional current collector layer located outside the substrate layer in another printed thin-film battery structure.

2. The printed battery with a perforated current collector according to claim 1, characterized in that: The first electrode layer and / or the second electrode layer are provided with a second sealing layer formed of a sealing material; the second sealing layer is on the same straight line as the center line of the opening region, and the opening region is located within the projection area of ​​the electrolyte membrane layer in the first substrate layer / second substrate layer; wherein the opening region is arranged in a dot matrix; the second sealing layer is used to prevent the electrolyte in the electrolyte membrane layer from longitudinally penetrating into the opening region.

3. The printed battery with a perforated current collector according to claim 2, characterized in that: The conductive material is provided on the side of the opening area, and the sealing material is provided in the middle of the opening area.

4. A battery pack characterized by: It includes a first printed thin-film battery and a second printed thin-film battery, both of which employ the printed battery with perforated current collector as described in any one of claims 1 to 3.

5. The battery pack of claim 4, wherein: The first current collector layer of the first printed thin-film battery and the second current collector layer of the second printed thin-film battery are connected by the conductive material to achieve a series connection between the first printed thin-film battery and the second printed thin-film battery; wherein, the first printed thin-film battery and the second printed thin-film battery are connected longitudinally or laterally, and the first printed thin-film battery and the second printed thin-film battery share the same substrate layer; when connected longitudinally, the first printed thin-film battery and the second printed thin-film battery are connected by the conductive material; when connected laterally, the first printed thin-film battery and the second printed thin-film battery are connected by the conductive material and the additional current collector layer.

6. The battery pack of claim 5, wherein: It includes a plurality of first printed thin-film batteries and a plurality of second printed thin-film batteries connected in series. The first tab layer is used to connect the first printed thin film battery and the second printed thin film battery located in the middle of the series to form a cuttable design; or the connecting carbon layer is used to connect the first printed thin film battery and the second printed thin film battery located in the middle of the series to form a foldable design.

7. The battery pack of claim 4, wherein: The two first current collector layers and the two second current collector layers of the first printed thin film battery and the second printed thin film battery are connected by the additional current collector layer to realize the parallel connection of the first printed thin film battery and the second printed thin film battery; wherein the first printed thin film battery and the second printed thin film battery are connected in a transverse manner and share the same base layer.

8. The battery pack according to claim 5 or 7, characterized by: The first printed thin film battery and the second printed thin film battery are connected in series to form a first sub-battery group, or the first printed thin film battery and the second printed thin film battery are connected in parallel to form a second sub-battery group.

9. The battery pack of claim 4, wherein: When the additional current collector layer is located inside the base layer, the center lines of the opening areas of the first printed thin film battery and the second printed thin film battery are not on the same straight line.

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