Battery structure and battery pack

Abstract

A battery structure and a battery pack. The battery structure comprises: a first housing (1) and a battery (11) assembled in the first housing (1), wherein a first positive output member (12) is disposed at a positive terminal of the battery (11), and a cover plate (111) of the battery (11) serves as a negative terminal of the battery (11); and a second housing (2) and a capacitor (21) assembled in the second housing (2), wherein a second positive output member (22) is disposed at a positive terminal of the capacitor (21), and a negative output member (23) is disposed at a negative terminal of the capacitor (21).

Description

A battery structure and battery pack

[0001] This application claims priority to Chinese Patent Application No. 2024216420416, filed on July 11, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and in particular to a battery structure and battery pack. Background Technology

[0003] Lithium thionyl chloride batteries are widely used in smart card meters, computer power supplies, medical devices, wireless communications, oil drilling, handheld communication equipment, scientific research instruments, remote data acquisition systems, military applications, and other electric equipment. In some application areas, such as smart card meters and military applications, power-type lithium thionyl chloride batteries are required.

[0004] However, due to voltage lag and safety risks associated with power batteries, their use is affected. Therefore, a composite power supply solution combining a capacity battery and a capacitor is now being introduced. The fabrication method in this technology is as follows: First, a traditional lithium-thionyl chloride battery is fabricated; then, a supercapacitor with a positive electrode on the outer shell and a negative electrode at the bottom center is fabricated, capable of providing a large current pulse; the supercapacitor is connected via wires; the connection points are filled with resin adhesive to form a single battery unit, solving the problem of large pulse current capability and eliminating battery voltage lag. Technical issues

[0005] The battery combination solution mentioned in the background technology only alleviates the shortcomings of battery discharge performance. The actual assembly process is complicated. The production process uses a potting process, which takes too long. Furthermore, improper potting and welding processes can easily lead to battery production quality risks. Technical solutions

[0006] In a first aspect, this application provides a battery structure, including:

[0007] A first housing and a battery assembled inside the first housing, wherein the positive terminal of the battery is provided with a first positive output component, and the cover plate of the battery is the negative terminal of the battery;

[0008] The second housing and the capacitor assembled inside the second housing, wherein the positive terminal of the capacitor is provided with a second positive output element and the negative terminal of the capacitor is provided with a negative output element;

[0009] The first housing and the second housing are assembled together, 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.

[0010] Secondly, this application provides a battery pack including the aforementioned battery structure. Beneficial effects

[0011] This application does not require the use of the existing potting and sealing process for preparation. Instead, it uses a two-shell assembly process. This newly designed assembly process is simple and avoids the need for complex production processes such as potting and sealing. It can effectively avoid quality and safety problems that are prone to occur during production. At the same time, this new design can reduce battery production costs and assembly costs, improve the efficiency of the entire production process, and improve overall economic benefits.

[0012] More importantly, the dimensions of this battery structure can be specifically designed during the manufacturing process. The designed dimensions can be consistent with the dimensions of the battery compartment used in existing applications, eliminating the need for new molds. The assembly process is simple and can be used with the battery compartments of existing application equipment. It is also compatible with multiple series or multiple connections between batteries, and the overall combination is more aesthetically pleasing and safer. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the battery structure according to an embodiment of this application;

[0014] Figure 2 is a schematic diagram of the exploded state of the battery structure according to an embodiment of this application;

[0015] Figure 3 is a schematic diagram of the internal structure of the battery structure in an embodiment of this application;

[0016] Figure 4 is a schematic diagram of another internal structure in the battery structure of this application embodiment;

[0017] Figure 5 is a schematic diagram of another internal structure in the battery structure of this application embodiment;

[0018] Figure 6 is a schematic diagram of the insulating component in the battery structure of an embodiment of this application;

[0019] Figure 7 is a schematic diagram of another internal structure in the battery structure of an embodiment of this application;

[0020] Attached Figures: 1-First housing, 11-Battery, 111-Cover plate, 12-First positive output component, 13-Insulator, 131-First assembly slot, 132-Notch, 133-Through hole, 134-Second assembly slot, 2-Second housing, 21-Capacitor, 22-Second positive output component, 221-Positive output post, 222-Connector, 23-Negative output component, 24-Contact spring, 3-Battery cover, 31-Opening. Embodiments of the present invention

[0021] In the description of this application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0023] The embodiments of this application disclose a battery structure, which may specifically be a lithium thionyl chloride capacity-type battery structure.

[0024] Referring to Figures 1-7, the battery structure includes a first housing 1 and a battery 11 assembled within the first housing 1. A first positive output component 12 is provided at the positive terminal of the battery 11, and a cover plate 111 of the battery 11 is the negative terminal of the battery 11. The battery structure also includes a second housing 2 and a capacitor 21 assembled within the second housing 2. A second positive output component 22 is provided at the positive terminal of the capacitor 21, and a negative output component 23 is provided at the negative terminal of the capacitor 21. The first housing 1 and the second housing 2 are assembled together, 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.

[0025] In this specific embodiment, the battery structure adopts a design of two assembleable shell structures. Specifically, by setting up an assembly structure of two shells, a first shell 1 and a 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. Then, the first shell 1 and the second shell 2 are assembled into one unit. The first positive electrode output component 12 of the battery 11 and the second positive electrode output component 22 of the capacitor 21 are electrically connected, and the cover plate 111 of the battery 11 and the negative electrode 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 this application does not need to use the potting and sealing process of the prior art, but specifically uses the assembly process of two shells. The assembly process of this new design is simple and avoids the complex production processes such as potting and sealing required in the production process, which can effectively avoid quality and safety problems that are prone to occur in 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.

[0026] More importantly, the dimensions of this battery structure can be specifically designed during the manufacturing process. The designed dimensions can be consistent with the dimensions of the battery compartment used in existing applications, eliminating the need for new molds. The assembly process is simple, and it can be used with the battery compartments of existing application equipment. It is also compatible with multiple series and multiple applications, and the overall combination is more aesthetically pleasing and safer.

[0027] In one or more embodiments, battery 11 may be a lithium subcapacity battery, or in one or more embodiments, a lithium subcapacity battery with a rated capacity corresponding to a lithium subpower battery, such as a rated capacity of 13Ah, 14Ah, or 15Ah. With this configuration, the internal structure design of the battery remains unchanged, for example, it includes conventional components such as lithium metal, carbon cathode, separator, electrolyte, current collector, steel shell, and cover plate, so that its capacity meets the corresponding power battery capacity requirements.

[0028] In one or more embodiments, the height of the battery 11 is reduced compared to the height of an existing lithium thionyl chloride battery. For example, the overall height d1 of the battery 11 can be within a certain range. With this setting, the height is reduced while 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.

[0029] In one or more embodiments, the wall thickness d2 of the first housing 1 can be in the range of 0.1mm ≤ d2 ≤ 1mm. For example, the wall thickness d2 of the first housing 1 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.18mm, 0.9mm, 1mm, etc. Of course, in some other embodiments, the wall thickness d2 of the first housing 1 can also be other values ​​within the range of 0.1mm ≤ d2 ≤ 1mm.

[0030] In one or more embodiments, the wall thickness d3 of the second housing 2 can be selected from the range of 0.1mm ≤ d3 ≤ 1mm. For example, the wall thickness d3 of the second housing 2 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.18mm, 0.9mm, 1mm, etc. Of course, in some other embodiments, the wall thickness d3 of the second housing 2 can also be other values ​​within the range of 0.1mm ≤ d3 ≤ 1mm.

[0031] In one or more embodiments, the height h1 of the battery 11 itself can be selected from the range of 30mm≤h1≤50mm. For example, the height h1 of the battery 11 itself can be 30mm, 32mm, 35mm, 38mm, 40mm, 42mm, 45mm, 48mm, 50mm, etc. Of course, in some other embodiments, the height h1 of the battery 11 itself can also be other values ​​within the range of 30mm≤h1≤50mm.

[0032] In one or more embodiments, the height h2 of the first housing 1 itself can be selected from the range of 30mm≤h2≤50mm. For example, the height h2 of the first housing 1 itself can be 30mm, 32mm, 35mm, 38mm, 40mm, 42mm, 45mm, 48mm, 50mm, etc. Of course, in some other embodiments, the height h2 of the first housing 1 itself can also be other values ​​within the range of 30mm≤h2≤50mm.

[0033] In one or more embodiments, the height h3 of the second housing 2 itself can be selected from the range of 20mm≤h3≤30mm. For example, the height h3 of the second housing 2 itself can be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, etc. Of course, in some other embodiments, the height h3 of the second housing 2 itself can also be other values ​​within the range of 20mm≤h3≤30mm.

[0034] In one or more embodiments, the height h4 of the entire assembly formed by the first housing 1 and the second housing 2 can be selected from the range of 50mm ≤ h4 ≤ 80mm. For example, the height h1 of the entire assembly formed by the first housing 1 and the second housing 2 can be 50mm, 52mm, 55mm, 58mm, 60mm, 62mm, 65mm, 68mm, 70mm, 72mm, 75mm, 78mm, 80mm, etc. Of course, in some other embodiments, the height h1 of the entire assembly formed by the first housing 1 and the second housing 2 can also be other values ​​within the range of 50mm ≤ h4 ≤ 80mm.

[0035] In one or more embodiments, the capacitor 21 may have a diameter of 15 mm and a height of 20 mm, and the second housing 2 for mounting the capacitor 21 may have a diameter of 34 mm and a height of 21 mm, in order to better adapt to actual conditions.

[0036] To improve structural stability, in one or more embodiments, an insulating member 13 is fixed to the cover plate 111 of the battery 11. A first mounting groove 131 is recessed on the insulating member 13, and the first positive electrode output member 12 is assembled within the first mounting groove 131. In a specific assembly structure, the insulating member 13 is specifically assembled onto 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. The first mounting groove 131 on the insulating member 13 allows the first positive electrode output member 12 to be engaged within the first mounting groove 131, effectively limiting and fixing the position of the first positive electrode output member 12, thereby improving the overall structural stability and strength.

[0037] Meanwhile, in order to make the first positive output component 12 more compactly connected to the positive terminal of the battery 11, a through hole 133 can be provided through the insulating component 13. The positive terminal post of the battery 11 can pass through the through hole 133 and be connected to the first positive output component 12 to form the positive terminal of the battery 11.

[0038] In one or more embodiments, the insulating element 13 may specifically be a plastic cover made of plastic material to prevent other workpieces from contacting the battery 11 and causing unnecessary short circuits, thereby improving overall safety.

[0039] In one or more embodiments, the insulating member 13 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 less than or equal to the diameter of the cover plate 111 of the battery 11.

[0040] In one or more embodiments, the first positive output component 12 may be a solder pad structure, and its shape may be a line-shaped solder pad.

[0041] In one or more embodiments, the thickness d1 of the insulating member 13 can be in the range of 0.1mm ≤ d1 ≤ 1mm. For example, the thickness d1 of the insulating member 13 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.18mm, 0.9mm, 1mm, etc. Of course, in some other embodiments, the thickness d1 of the insulating member 13 can also be other values ​​within the range of 0.1mm ≤ d1 ≤ 1mm.

[0042] In practical use, the cover plate 111 of battery 11 serves as the negative terminal of battery 11. To make the structure more compact and facilitate electrical connection with the negative terminal output component 23 of capacitor 21, in one or more embodiments, a notch 132 is provided through the insulating component 13. A negative terminal connection area is exposed on the cover plate 111 of battery 11 at a position opposite to the notch 132. The negative terminal output component 23 passes through the notch 132 and is electrically connected to the negative terminal connection area. This arrangement avoids interference between the negative terminal output component 23 of capacitor 21 and the insulating component 13, while also making the structure more compact and saving the cost of battery 11 and the space of battery pack 11.

[0043] In one or more embodiments, the number of capacitors 21 can be determined according to the battery 11 used in the actual application. For example, in one or more embodiments, the number of capacitors 21 can be multiple, specifically three, four, or five, etc. In the illustrated embodiment, it is specifically three. In the specific structure, the second positive output component 22 is connected to the positive terminal of the multiple capacitors 21 to ensure that the multiple capacitors 21 can work normally synchronously and improve the overall operational stability.

[0044] To make the overall structure more compact, in one or more embodiments, the second positive output component 22 has a positive output post 221 protruding from one end facing away from the capacitor 21. The positive output post 221 serves as the positive terminal of the capacitor 21. The second positive output component 22 is connected to a connector 222, which is located on the outer side of the capacitor 21. The connector 222 is electrically connected to the first positive output component 12 and the second positive output component 22. During actual assembly, it was found that there were multiple capacitors 21 between the second positive output component 22 connected to the positive terminal of capacitor 21 and the first positive output component 12 connected to the positive terminal of battery 11, resulting in a certain gap. In order to make the second positive output component 22 of capacitor 21 and the first positive output component 12 of battery 11 more compactly connected, a connector 222 was provided to connect the second positive output component 22 and the first positive output component 12. At the same time, the connector 222 extends from the top of capacitor 21 with the positive terminal to the bottom with the negative terminal, and the connector 222 is also specifically located on the circumferential outer side of capacitor 21, which makes the structure more compact and can save the cost of battery 11 and the space of battery 11 pack.

[0045] In one or more embodiments, the shape of the second positive output component 22 may specifically be L-shaped, Z-shaped, plum blossom-shaped, etc., and is not limited here.

[0046] In one or more embodiments, the second positive output component 22 may be a solder pad structure, and its shape may be plum blossom-shaped, i.e., plum blossom-shaped solder pad.

[0047] In one or more embodiments, the negative output component 23 can be a solder tab structure, the shape of which can be designed into a straight line, crescent shape, or other shapes depending on the number of capacitors 21. It is understood that in one or more embodiments, the first positive output component 12, the second positive output component 22, and the negative output component 23 are solder tab structures, and the use of solder tabs for connection can reduce the production cost and assembly cost of the battery 11, and improve the efficiency of the entire production process.

[0048] In one or more embodiments, the electrical connection between the connector 222 and the first positive output component 12 can be fixed by welding methods such as resist welding or laser welding.

[0049] To facilitate assembly, in one or more embodiments, the negative output component 23 is electrically connected to a contact spring 24, which is located within the notch 132 of the insulating component 13 and is electrically connected to the cover plate 111 of the battery 11. With this configuration, during assembly, the contact spring 24 can be specifically welded to the cover plate 111 of the battery 11 or the negative output component 23. In some embodiments, welding to the cover plate 111 of the battery 11 provides ample space and facilitates welding. Then, during the assembly of the first housing 1 and the second housing 2, the non-welded end of the contact spring 24 will specifically abut against the negative output component 23, completing the electrical connection between the two. This physical contact is achieved using a spring, and the components are then joined and fixed together by the first housing 1 and the second housing 2. Compared to the process where both ends require spot welding, this effectively solves the problem of difficult spot welding at this location.

[0050] To make the overall structure more compact, in one or more embodiments, the end of the insulating member 13 facing the capacitor 21 is recessed with a second mounting groove 134, and the negative output member 23 is mounted in the second mounting groove 134. This arrangement can effectively limit and fix the position of the second mounting groove 134, improving the overall structural stability and strength; at the same time, the structure will be more compact, saving the cost of the battery 11 and the space of the battery 11 pack.

[0051] Since the insulating component 13 has both a first mounting groove 131 and a second mounting groove 134 recessed on it, the first positive output component 12 is mounted in the first mounting groove 131 and the negative output component 23 is mounted in the second mounting groove 134. In order to avoid interference between the first positive output component 12 and the negative output component 23, in one or more embodiments, the depth of the first mounting groove 131 is greater than the depth of the second mounting groove 134, so as to stagger the mounting positions of the first positive output component 12 and the negative output component 23 and avoid interference.

[0052] In one or more embodiments, the shape of the second assembly groove 134 is adapted to the shape of the negative output component 23. In one or more embodiments, the shape is arc-shaped, or it can also be crescent-shaped as shown in the figure.

[0053] To facilitate the assembly of capacitor 21 on the first housing 1, the top of the second housing 2 is open away from the first housing 1, so that capacitor 21 can be assembled from the open and the work efficiency can be improved. Therefore, in order to avoid damage to capacitor 21 caused by the exposure of the open and to improve the overall sealing performance, a battery cover 3 is provided at the top open of the second housing 2, which can improve the overall safety performance.

[0054] Since the second positive output component 22 has a protruding positive output post 221, an opening 31 is provided through the battery cover 3 to better connect with the external busbar. The positive output post 221 can pass through the opening 31 and extend to the outside of the entire battery structure to ensure that the battery structure can operate normally. Furthermore, after the battery cover 3 is added to the top of the first housing 1, the whole assembly can be heat-shrink sealed with a sleeve to complete the overall assembly.

Claims

1. A battery structure, comprising: The first housing (1) and the battery (11) assembled in the first housing (1), wherein the positive terminal of the battery (11) is provided with a first positive output component (12), and the cover plate (111) of the battery (11) is the negative terminal of the battery (11); The second housing (2) and the capacitor (21) assembled in the second housing (2), wherein the positive terminal of the capacitor (21) is provided with a second positive output element (22) and the negative terminal of the capacitor (21) is provided with a negative output element (23); The first housing (1) and the second housing (2) are assembled together, 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. The battery structure according to claim 1, wherein, The cover plate (111) of the battery (11) is fixed with an insulating component (13), and the insulating component (13) is recessed with a first mounting groove (131), and the first positive electrode output component (12) is assembled in the first mounting groove (131).

3. A battery structure according to claim 2, wherein, A notch (132) is provided through the insulating component (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). The negative electrode output component (23) passes through the notch (132) and is electrically connected to the negative electrode connection area.

4. A battery structure according to claim 2, wherein, The first positive output device (12), the second positive output device (22), and the negative output device (23) are solder pad structures.

5. A battery structure according to any one of claims 1-4, wherein, The capacitor (21) is provided in multiple ways, and the second positive output component (22) is connected to the positive terminal of the multiple capacitors (21); The second positive output component (22) has a positive output post (221) protruding from one end facing away from the capacitor (21). The positive output post (221) serves as the positive terminal of the capacitor (21). The second positive output component (22) is connected to a connector (222). The connector (222) is located on the circumferential outer side of the capacitor (21). The connector (222) is electrically connected to the first positive output component (12) and the second positive output component (22).

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

7. A battery structure according to claim 2, wherein, The insulating component (13) has a second mounting groove (134) recessed at one end facing the capacitor (21), and the negative output component (23) is mounted in the second mounting groove (134). The depth of the first mounting groove (131) is greater than the depth of the second mounting groove (134). The top of the second housing (2) away from the first housing (1) is open, and a battery cover (3) is provided at the top opening of the second housing (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, wherein, The thickness d1 of the insulating component (13) is in the range of 0, 1mm ≤ d1 ≤ 1mm; The shell wall thickness d2 of the first shell (1) is in the range of 0, 1mm≤d2≤1mm; The shell wall thickness d3 of the second shell (2) is in the range of 0, 1mm ≤ d3 ≤ 1mm.

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

10. A battery pack comprising a battery structure according to any one of claims 1-9.

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