Battery structure and battery pack

Abstract

The utility model relates to a battery structure and a battery pack. The battery structure comprises a first shell and a battery assembled in the first shell, the positive electrode end of the battery is provided with a first positive electrode output piece, and a cover plate of the battery is the negative electrode end of the battery; the capacitor is assembled in the second shell, the positive electrode end of the capacitor is provided with a second positive electrode output piece, and the negative electrode end of the capacitor is provided with a negative electrode output piece. According to the invention, a glue filling sealing technology in the prior art does not need to be adopted for preparation, but an assembling technology of the two shells is specifically adopted for preparation, the newly designed assembling technology is simple in assembling process, complex production technologies such as glue filling sealing in the production process are avoided, and the quality and safety problems easily generated in the production process can be effectively avoided; meanwhile, the new design can reduce the production cost and the assembly cost of the battery, improve the efficiency of the whole production process and improve the overall economic benefit.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery structure and a battery pack. Background Art

[0002] Lithium thionyl chloride batteries are widely used in smart card meters, computer support power supplies, medical equipment, wireless communications, oil drilling, portable communication equipment, scientific research instruments, remote control data acquisition systems, military applications and other electric equipment. In some application fields, such as smart card meters and military applications, power-type lithium thionyl chloride batteries are needed.

[0003] However, power-type batteries have voltage hysteresis and safety risks, which affect their use. Now, a composite power supply solution combining capacity-type batteries and capacitors has been introduced, such as a method for preparing a hysteresis-free lithium-thionyl chloride battery with patent authorization number CN100337364C. The method comprises the following steps: first, a traditional lithium-thionyl chloride battery is made; second, a supercapacitor with a positive outer shell and a negative bottom center that can provide a large current pulse is made; the supercapacitor is connected to the supercapacitor via a wire; and the connection part is filled with resin glue to form an integral battery to solve the problem of large pulse current capability and battery voltage hysteresis. However, this combined battery solution only solves the problem of battery discharge performance. The actual assembly process is complicated, and a glue filling process is used in the production process. The production time is too long. In addition, improper glue application and welding processes can easily lead to battery production quality risks. There is room for improvement. Utility Model Content

[0004] In order to overcome at least one of the defects of the above-mentioned prior art, according to one aspect of the present invention, a battery structure is provided to avoid the need for complex production processes such as glue filling and sealing during the production process, which can effectively reduce the occurrence of quality and safety problems during the production process.

[0005] A battery structure comprising:

[0006] A first housing and a battery assembled in the first housing, wherein the positive terminal of the battery is provided with a first positive output member, and the cover of the battery is the negative terminal of the battery;

[0007] a second housing and a capacitor assembled in the second housing, wherein the positive terminal of the capacitor is provided with a second positive output member, and the negative terminal of the capacitor is provided with a negative output member;

[0008] The first shell and the second shell are assembled, the first positive output component and the second positive output component are electrically connected, and the cover plate and the negative output component are electrically connected.

[0009] In one embodiment of the present application, an insulating member is fixed to the cover of the battery, a first assembly groove is recessed on the insulating member, and the first positive output member is assembled in the first assembly groove.

[0010] In one embodiment of the present application, a notch is provided through the insulating member, a negative electrode connection area is exposed on the battery cover at a position opposite to the notch, and the negative electrode output member is electrically connected to the negative electrode connection area through the notch.

[0011] In one embodiment of the present application, the first positive output component, the second positive output component and the negative output component are welding sheet structures.

[0012] In one embodiment of the present application, a plurality of capacitors are provided, and the second positive electrode output member is connected to the positive electrodes of the plurality of capacitors;

[0013] A positive output column is protruding from one end of the second positive output member facing away from the capacitor, and the positive output column serves as the positive terminal of the capacitor. The second positive output member is connected to a connector, which is arranged on the circumferential outer side of the capacitor. The connector is electrically connected to the first positive output member and the second positive output member respectively.

[0014] In one embodiment of the present application, the negative output member is electrically connected to a contact spring, the contact spring is located in a notch of the insulating member, and the contact spring is electrically connected to a cover plate of the battery.

[0015] In one embodiment of the present application, a second assembly groove is recessed at one end of the insulating member facing the capacitor, the negative output member is assembled in the second assembly groove, and the depth of the first assembly groove is greater than the depth of the second assembly groove;

[0016] The top end of the second shell away from the first shell is open, and a battery cover is provided at the open top end of the second shell; an opening is penetrated through the battery cover.

[0017] In one embodiment of the present application, the thickness d1 of the insulating member is in the range of 0.1 mm ≤ d1 ≤ 1 mm;

[0018] The shell wall thickness d2 of the first shell is in the range of 0.1mm≤d2≤1mm;

[0019] The shell wall thickness d3 of the second shell is in the range of 0.1 mm≤d3≤1 mm.

[0020] In one embodiment of the present application, the height h1 of the battery itself is in the range of 30 mm ≤ h1 ≤ 50 mm;

[0021] The height h2 of the first shell itself is in the range of 30mm≤h2≤50mm;

[0022] The height h3 of the second shell itself may be in the range of 20 mm ≤ h3 ≤ 30 mm;

[0023] The height h4 of the whole formed by the assembly of the first shell and the second shell is in the range of 50 mm ≤ h1 ≤ 80 mm.

[0024] According to another aspect of the present invention, a battery pack is provided, comprising the above-mentioned battery structure.

[0025] In summary, the battery structure and battery pack provided by the present invention have the following technical effects:

[0026] The present application does not need to adopt the glue filling and sealing process in the prior art for preparation, but instead adopts the assembly process of two shells for preparation. The assembly process of the newly designed assembly process is simple, avoiding the need for complex production processes such as glue filling and sealing during the production process, and can effectively avoid quality and safety problems that are easily generated during the production process; at the same time, the new design can reduce the battery production cost and assembly cost, improve the efficiency of the entire production process, and improve the overall economic benefits.

[0027] More importantly, during the specific production and manufacturing process, the dimensions of the battery structure can be specifically designed. The designed specific dimensions can be consistent with the dimensions of the battery compartment used in existing applications, without the need for re-molding. At the same time, the assembly process is simple, and it can match the battery compartment of existing application equipment. At the same time, it is compatible with multiple series or multiple connections between batteries and the overall combination appearance is more beautiful and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the battery structure of an embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the exploded state of the battery structure of an embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the internal structure of the battery structure in an embodiment of the utility model;

[0031] Figure 4 This is another schematic diagram of the internal structure of the battery structure in an embodiment of the present utility model;

[0032] Figure 5 This is another schematic diagram of the internal structure of the battery structure in an embodiment of the present utility model;

[0033] Figure 6 This is a schematic structural diagram of an insulating member in a battery structure according to an embodiment of the present utility model;

[0034] Figure 7This is another schematic diagram of the internal structure of the battery structure in an embodiment of the present utility model;

[0035] Figures: 1-first shell, 11-battery, 111-cover, 12-first positive output member, 13-insulating member, 131-first assembly groove, 132-notch, 133-through hole, 134-second assembly groove, 2-second shell, 21-capacitor, 22-second positive output member, 221-positive output column, 222-connecting member, 23-negative output member, 24-contact spring, 3-battery cover, 31-opening. DETAILED DESCRIPTION

[0036] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0039] The embodiment of the utility model discloses a battery structure, which can be specifically a lithium thionyl chloride capacity type battery structure.

[0040] See Figure 1-Figure 7 The battery structure includes a first shell 1 and a battery 11 assembled in the first shell 1, the positive terminal of the battery 11 is provided with a first positive output component 12, and the cover 111 of the battery 11 is the negative terminal of the battery 11; the battery structure also includes a second shell 2 and a capacitor 21 assembled in the second shell 2, the positive terminal of the capacitor 21 is provided with a second positive output component 22, and the negative terminal of the capacitor 21 is provided with a negative output component 23; wherein, the first shell 1 and the second shell 2 are assembled and combined, the first positive output component 12 and the second positive output component 22 are electrically connected, and the cover 111 and the negative output component 23 are electrically connected.

[0041] In this specific embodiment, the battery structure specifically adopts a design of two shell structures that can be assembled and combined. Specifically, by setting up an assembly structure of the first shell 1 and the second shell 2, the battery 11 and the capacitor 21 are assembled separately, that is, the battery 11 is assembled separately into the first shell 1, and the capacitor 21 is assembled separately into the second shell 2. The first shell 1 and the second shell 2 are then assembled into one body, and the first positive output component 12 of the battery 11 and the second positive output component 22 of the capacitor 21 are electrically connected, and the cover 111 of the battery 11 and the negative output component 23 of the capacitor 21 are electrically connected to ensure that the battery structure can be used normally. It can be seen that the present application does not need to adopt the glue sealing process in the prior art for preparation, but instead adopts the assembly process of two shells. The assembly process of this new design is simple, avoids the need for complex production processes such as glue sealing during the production process, and can effectively avoid quality and safety issues that are easily generated during the production process. At the same time, this new design can reduce the production cost and assembly cost of the battery 11, improve the efficiency of the entire production process, and improve the overall economic benefits.

[0042] More importantly, during the specific production and manufacturing process, the dimensions of the battery structure can be specifically designed. The designed specific dimensions can be consistent with the dimensions of the battery compartment used in existing applications, without the need for re-molding. At the same time, the assembly process is simple, and it can match the battery compartment of existing application equipment. At the same time, it can be compatible with multiple strings and can be used, and the overall combination appearance is more beautiful and safer.

[0043] The battery 11 mentioned above can be specifically a lithium sub-capacity battery. In an optional embodiment, it can be a lithium sub-capacity battery with a rated capacity corresponding to a lithium sub-power battery, for example, the rated capacity can be 13Ah, 14Ah or 15Ah, etc. With such a configuration, the internal structure design of the battery remains unchanged, for example, it includes conventional metal lithium, carbon positive electrode, diaphragm, electrolyte, current collector, steel shell, cover plate and other components, so that its capacity meets the corresponding required power battery capacity.

[0044] In another optional embodiment, the height of the battery 11 mentioned above is reduced compared to the height of the existing lithium thionyl chloride battery. For example, the overall height d1 of the battery 11 can be in the range of . In this way, while reducing the height, the capacity of the battery 11 is still comparable to that of a power battery, which can effectively save the cost of the battery 11 and the space occupied by the battery 11.

[0045] The shell wall thickness d2 of the first shell 1 mentioned above may be in the range of 0.1 mm ≤ d2 ≤ 1 mm. For example, the shell wall thickness d2 of the first shell 1 may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.18 mm, 0.9 mm, 1 mm, etc. Of course, in other embodiments, the shell wall thickness d2 of the first shell 1 may also be other values within the range of 0.1 mm ≤ d2 ≤ 1 mm.

[0046] The aforementioned thickness d3 of the second housing 2 may be in the range of 0.1 mm ≤ d3 ≤ 1 mm. For example, the thickness d3 of the second housing 2 may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.18 mm, 0.9 mm, 1 mm, etc. Of course, in other embodiments, the thickness d3 of the second housing 2 may be other values within the range of 0.1 mm ≤ d3 ≤ 1 mm.

[0047] The height h1 of the battery 11 mentioned above can be selected within the range of 30 mm ≤ h1 ≤ 50 mm. For example, the height h1 of the battery 11 can be 30 mm, 32 mm, 35 mm, 38 mm, 40 mm, 42 mm, 45 mm, 48 mm, 50 mm, etc. Of course, in some other embodiments, the height h1 of the battery 11 can also be other values within the range of 30 mm ≤ h1 ≤ 50 mm.

[0048] The height h2 of the first housing 1 mentioned above can be selected within the range of 30 mm ≤ h2 ≤ 50 mm. For example, the height h2 of the first housing 1 can be 30 mm, 32 mm, 35 mm, 38 mm, 40 mm, 42 mm, 45 mm, 48 mm, 50 mm, etc. Of course, in some other embodiments, the height h2 of the first housing 1 can also be other values within the range of 30 mm ≤ h2 ≤ 50 mm.

[0049] The height h3 of the second housing 2 mentioned above can be selected within the range of 20 mm ≤ h3 ≤ 30 mm. For example, the height h3 of the second housing 2 can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, etc. Of course, in other embodiments, the height h3 of the second housing 2 can also be other values within the range of 20 mm ≤ h3 ≤ 30 mm.

[0050] The height h4 of the assembly formed by the first shell 1 and the second shell 2 mentioned above can be selected within the range of 50 mm ≤ h4 ≤ 80 mm. For example, the height h1 of the assembly formed by the first shell 1 and the second shell 2 can be 50 mm, 52 mm, 55 mm, 58 mm, 60 mm, 62 mm, 65 mm, 68 mm, 70 mm, 72 mm, 75 mm, 78 mm, 80 mm, etc. Of course, in other embodiments, the height h1 of the assembly formed by the first shell 1 and the second shell 2 can also be other values within the range of 50 mm ≤ h4 ≤ 80 mm.

[0051] In an optional embodiment, the capacitor 21 may have a diameter of 15 mm and a height of 20 mm, and the second housing 2 for assembling the capacitor 21 may have a diameter of 34 mm and a height of 21 mm, so as to better adapt to actual conditions.

[0052] To improve structural stability, in an optional embodiment, an insulating member 13 is fixed to the cover plate 111 of the battery 11. The insulating member 13 is recessed with a first assembly groove 131, and the first positive output member 12 is assembled into the first assembly groove 131. In a specific assembly structure, the insulating member 13 is specifically assembled to the cover plate 111 of the battery 11. For example, the insulating member 13 is fixed to the cover plate 111 of the battery 11; and the first assembly groove 131 is provided on the insulating member 13. The first positive output member 12 can be locked into the first assembly groove 131, which can effectively limit and fix the position of the first positive output member 12, thereby improving the overall structural stability and strength.

[0053] At the same time, in order to enable the first positive output member 12 to be more compactly connected to the positive terminal of the battery 11, a through hole 133 can be specifically provided through the insulating member 13, and the positive pole of the battery 11 can pass through the through hole 133 to be connected to the first positive output member 12 to form the positive terminal of the battery 11.

[0054] The insulating member 13 mentioned above can be specifically a plastic cover made of plastic material to prevent other workpieces from contacting the battery 11 and causing unnecessary short circuit problems, thereby improving overall safety.

[0055] The insulating member 13 mentioned above may be circular, and the diameter of the insulating member 13 may be adapted to the diameter of the cover plate 111 of the battery 11 . For example, the diameter of the insulating member 13 may be smaller than or equal to the diameter of the cover plate 111 of the battery 11 .

[0056] The first positive output component 12 mentioned above may be a welding piece structure, and its shape may be a straight line, ie, a straight line welding piece.

[0057] The thickness d1 of the insulating member 13 mentioned above may be in the range of 0.1 mm ≤ d1 ≤ 1 mm. For example, the thickness d1 of the insulating member 13 may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.18 mm, 0.9 mm, 1 mm, etc. Of course, in other embodiments, the thickness d1 of the insulating member 13 may also be other values within the range of 0.1 mm ≤ d1 ≤ 1 mm.

[0058] Since, in actual use, the cover 111 of the battery 11 will serve as the negative terminal of the battery 11, in order to make the structure more compact and facilitate electrical connection with the negative output member 23 of the capacitor 21, in an optional embodiment, a notch 132 is provided through the insulating member 13. A negative connection area is exposed on the cover 111 of the battery 11 at a position opposite the notch 132, and the negative output member 23 is electrically connected to the negative connection area through the notch 132. This arrangement avoids interference between the negative output member 23 of the capacitor 21 and the insulating member 13, while also making the structure more compact, further saving the cost of the battery 11 and the space in the battery 11 package.

[0059] The number of capacitors 21 mentioned above can be determined based on the actual battery 11 used. For example, in an optional embodiment, the number of capacitors 21 can be multiple, specifically three, four, or five, etc. In the illustrated embodiment, there are three capacitors. In the specific structure, the second positive output member 22 is connected to the positive poles of the multiple capacitors 21 to ensure that the multiple capacitors 21 can operate normally and synchronously, thereby improving overall operational stability.

[0060] In order to make the overall structure more compact, in an optional embodiment, a positive output column 221 is protruding from the end of the second positive output member 22 facing away from the capacitor 21. The positive output column 221 serves as the positive terminal of the capacitor 21. The second positive output member 22 is connected to a connector 222. The connector 222 is arranged on the circumferential outer side of the capacitor 21. The connector 222 is electrically connected to the first positive output member 12 and the second positive output member 22, respectively. In actual assembly, it was found that there were multiple capacitors 21 between the second positive output member 22 connected to the positive pole of the capacitor 21 and the first positive output member 12 connected to the positive pole of the battery 11, with a certain distance therebetween. In order to make the second positive output member 22 of the capacitor 21 and the first positive output member 12 of the battery 11 more compactly connected, a connector 222 was provided to connect the second positive output member 22 and the first positive output member 12. At the same time, the connector 222 extended from the top of the capacitor 21 with the positive pole toward the bottom with the negative pole, and the connector 222 was specifically provided on the circumferential outer side of the capacitor 21. This made the structure more compact, which could further save the cost of the battery 11 and the space in the battery pack.

[0061] The shape of the second positive electrode output member 22 mentioned above can be specifically L-shaped, Z-shaped, plum blossom-shaped, etc., which is not limited here.

[0062] The second positive output member 22 mentioned above may be a welding piece structure, and its shape may be a plum blossom shape, that is, a plum blossom-shaped welding piece.

[0063] The aforementioned negative output member 23 may be a solder tab structure, and its shape can be designed to be a straight-line, crescent-shaped, or other shape depending on the number of capacitors 21. It can be seen that in an optional embodiment, the first positive output member 12, the second positive output member 22, and the negative output member 23 are solder tab structures. Using solder tabs for connection can further reduce the production and assembly costs of the battery 11 and further improve the efficiency of the entire production process.

[0064] The electrical connection between the aforementioned connecting member 222 and the first positive output member 12 can be fixed by welding methods such as resist welding or laser welding.

[0065] To make the structure easier to assemble, in an optional embodiment, the negative output member 23 is electrically connected to a contact spring 24, which is located in the notch 132 of the insulating member 13. The contact spring 24 is electrically connected to the cover 111 of the battery 11. With this arrangement, during assembly, the contact spring 24 can first be welded to the cover 111 of the battery 11 or the negative output member 23, preferably to the cover 111 of the battery 11, as there is ample space for welding. Then, when the first shell 1 and the second shell 2 are assembled, the non-welded end of the contact spring 24 will specifically abut against the negative output member 23, completing the electrical connection between the two. The spring is used for physical contact at this location, and the first shell 1 and the second shell 2 are then spliced together to further secure them. Compared to a process that requires spot welding at both ends, this can effectively solve the problem of difficult spot welding processes at this location.

[0066] To make the overall structure more compact, in an optional embodiment, a second mounting groove 134 is recessed on the end of the insulating member 13 facing the capacitor 21, and the negative output member 23 is mounted within the second mounting groove 134. This arrangement effectively limits and fixes the position of the second mounting groove 134, improving the overall structural stability and strength; at the same time, the structure is also more compact, further saving the cost of the battery 11 and the space required for the battery pack 11.

[0067] Since the first assembly groove 131 and the second assembly groove 134 are both recessed on the insulating member 13, the first positive output member 12 is assembled in the first assembly groove 131, and the negative output member 23 is assembled in the second assembly groove 134. In order to avoid interference between the first positive output member 12 and the negative output member 23, in an optional embodiment, the depth of the first assembly groove 131 is greater than the depth of the second assembly groove 134, so that the assembly positions of the first positive output member 12 and the negative output member 23 are staggered to avoid interference.

[0068] The shape of the second assembly groove 134 mentioned above is adapted to the shape of the negative electrode output member 23 , and the shape can be arc-shaped or crescent-shaped as shown in the figure.

[0069] In order to facilitate the assembly of the capacitor 21 on the first shell 1, the top of the second shell 2 away from the first shell 1 is opened, so that the capacitor 21 can be assembled from the opening to improve work efficiency. Therefore, in order to avoid damage to the capacitor 21 caused by exposure of the opening and to improve the overall sealing, a battery cover 3 is provided at the top opening of the second shell 2 to improve the overall safety performance.

[0070] Because the second positive output member 22 is provided with a protruding positive output post 221, an opening 31 is provided through the battery cover 3 to facilitate connection with an external busbar. The positive output post 221 can extend through the opening 31 to the exterior of the entire battery structure, ensuring proper operation of the battery structure. Furthermore, after the battery cover 3 is attached to the top of the first housing 1, the entire structure can be heat-shrunk with a sleeve to complete the overall assembly.

[0071] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A battery structure, characterized in that: include: A first housing (1) and a battery (11) assembled in the first housing (1), wherein the positive terminal of the battery (11) is provided with a first positive output member (12), and the cover plate (111) of the battery (11) serves as the negative terminal of the battery (11); A second housing (2) and a capacitor (21) assembled in the second housing (2), wherein the positive terminal of the capacitor (21) is provided with a second positive output component (22), and the negative terminal of the capacitor (21) is provided with a negative output component (23); The first shell (1) and the second shell (2) are assembled, the first positive output component (12) and the second positive output component (22) are electrically connected, and the cover plate (111) and the negative output component (23) are electrically connected.

2. A battery structure according to claim 1, characterized in that: An insulating member (13) is fixed to the cover plate (111) of the battery (11), a first assembly groove (131) is recessed on the insulating member (13), and the first positive output member (12) is assembled in the first assembly groove (131).

3. A battery structure according to claim 2, characterized in that: A notch (132) is provided through the insulating member (13), a negative electrode connection area is exposed on the cover plate (111) of the battery (11) at a position opposite to the notch (132), and the negative electrode output member (23) passes through the notch (132) and is electrically connected to the negative electrode connection area.

4. A battery structure according to claim 2, characterized in that: The first positive output component (12), the second positive output component (22) and the negative output component (23) are welding sheet structures.

5. A battery structure according to any one of claims 1 to 4, characterized in that: The capacitor (21) is provided in plurality, and the second positive electrode output member (22) is connected to the positive poles of the plurality of capacitors (21); A positive output column (221) is protruding from one end of the second positive output member (22) facing away from the capacitor (21), and the positive output column (221) serves as the positive terminal of the capacitor (21). The second positive output member (22) is connected to a connecting member (222), and the connecting member (222) is arranged on the circumferential outer side of the capacitor (21). The connecting member (222) is electrically connected to the first positive output member (12) and the second positive output member (22), respectively.

6. A battery structure according to claim 3, characterized in that: The negative output member (23) is electrically connected to a contact spring (24), the contact spring (24) is located in a notch (132) of the insulating member (13), and the contact spring (24) is electrically connected to a cover plate (111) of the battery (11).

7. A battery structure according to claim 2, characterized in that: A second assembly groove (134) is recessed on one end of the insulating member (13) facing the capacitor (21), the negative output member (23) is assembled in the second assembly groove (134), and the depth of the first assembly groove (131) is greater than the depth of the second assembly groove (134); The top end of the second shell (2) away from the first shell (1) is open, and a battery cover (3) is provided at the open top end of the second shell (2); an opening (31) is provided through the battery cover (3).

8. A battery structure according to any one of claims 2-4, 6, and 7, characterized in that: The thickness d1 of the insulating member (13) is in the range of 0.1 mm ≤ d1 ≤ 1 mm; The shell wall thickness d2 of the first shell (1) is in the range of 0.1 mm ≤ d2 ≤ 1 mm; The shell wall thickness d3 of the second shell (2) is in the range of 0.1 mm ≤ d3 ≤ 1 mm.

9. A battery structure according to any one of claims 2-4, 6, and 7, characterized in that: The height h1 of the battery (11) itself is in the range of 30 mm ≤ h1 ≤ 50 mm; The height h2 of the first shell (1) itself is in the range of 30 mm ≤ h2 ≤ 50 mm; The height h3 of the second shell (2) itself can be in the range of 20mm≤h3≤30mm; The height h4 of the whole formed by assembling the first shell (1) and the second shell (2) is in the range of 50 mm ≤ h1 ≤ 80 mm.

10. A battery pack, characterized in that: The invention comprises a battery structure according to any one of claims 1 to 9.

Images