Battery structure and battery pack

Abstract

To provide a battery structure that reduces risks to battery production quality. [Solution] A battery structure and a battery pack are disclosed, which include a first case 1, a battery mounted within the first case, and a second case 2, a capacitor mounted within the second case, the battery having a first positive output member at its positive end and a cover plate serving as the negative end of the battery, and the capacitor having a second positive output member at its positive end and a negative output member at its negative end.

Description

【Technical Field】 【0001】 This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on July 11, 2024, with an application number of 202421642041.6, and all the contents of the above application are incorporated herein by reference. 【0002】 This application relates to the technical field of batteries, and particularly to battery structures and battery packs. 【Background Art】 【0003】 Lithium thionyl chloride batteries are widely used in smart card meters, computer support power supplies, medical devices, wireless communications, oil drilling, portable communication devices, scientific research equipment, remote control data acquisition systems, military applications, and other electric devices. In some application fields, such as smart card meters, military applications, etc., it is necessary to use power-type lithium thionyl chloride batteries. 【0004】 However, there are voltage delay and usage safety risks in power-type batteries, which affect their use. Currently, a composite power source of a capacity-type battery + capacitor has been proposed. The manufacturing method in the related technology is to first fabricate a conventional lithium-thionyl chloride battery, and then separately fabricate a supercapacitor that can provide a large current pulse with the outer shell as the positive electrode and the center of the bottom as the negative electrode. Connect the battery to the supercapacitor by wire connection, and inject and fill a resin adhesive at the connection point so that they become an integrated battery, thereby solving the large pulse current capacity and eliminating the voltage delay of the battery. 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 The configuration of the combined battery described in the background technology only mitigates the shortcomings of the battery's discharge performance. However, the actual assembly process is complex, a potting process is used in the production process, the production time is too long, and if there are any problems during the bonding or welding process, the risk to the battery's production quality increases. [Means for solving the problem] 【0006】 In the first aspect, the present application is: The device comprises a first case and a battery installed inside the first case, and a second case and a capacitor installed inside the second case. The aforementioned battery has a first positive output element at its positive terminal, and its cover plate is at the negative terminal of the battery. A second positive output member is provided at the positive terminal of the capacitor, and a negative output member is provided at the negative terminal of the capacitor. The present invention provides a battery structure in which the first case and the second case are mounted and combined, the first positive electrode output member and the second positive electrode output member are electrically connected, and the cover plate and the negative electrode output member are electrically connected. 【0007】 In a second aspect, the present application provides a battery pack having the battery structure described above. [Effects of the Invention] 【0008】 This invention eliminates the need to employ the potting sealing process of the prior art in manufacturing, and specifically employs a two-case mounting process. This new mounting process simplifies the assembly process, avoiding the need for complex production processes such as potting sealing during production, effectively avoiding quality and safety problems that are likely to occur during production. At the same time, this new design can reduce the production and assembly costs of batteries, increase the overall efficiency of the production process, and improve overall economic effects. 【0009】 More importantly, the dimensions of this battery structure can be specifically designed during the actual production and manufacturing process, and the designed dimensions can be matched to the dimensions of battery chambers used in existing applications, eliminating the need to create new molds. At the same time, the assembly process is simple, and it can be used in conjunction with battery chambers of existing application equipment. Furthermore, it supports the use of multiple series or parallel connections between batteries, and the overall appearance of the combination is more aesthetically pleasing and safer. [Brief explanation of the drawing] 【0010】 [Figure 1] This is a schematic diagram of the battery structure of an embodiment of the present invention. [Figure 2] This is a schematic diagram of the battery structure of the embodiment of the present invention in an exploded state. [Figure 3] This is a schematic diagram of the internal structure of the battery structure according to an embodiment of the present invention. [Figure 4] This is a schematic diagram of another internal structure in the battery structure of the embodiment of the present invention. [Figure 5] This is a schematic diagram of yet another internal structure in the battery structure of the embodiment of the present invention. [Figure 6] This is a schematic diagram of the structure of the insulating member in the battery structure of the embodiment of the present invention. [Figure 7] This is a schematic diagram of the further internal structure of the battery structure of the embodiment of the present invention. [Modes for carrying out the invention] 【0011】 Furthermore, in the description of this application, the directions or positional relationships indicated by terms such as "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" are based on the directions or positional relationships shown in the drawings and are merely for the purpose of facilitating the description of this application and simplifying the operation. They do not indicate or imply that the mentioned devices or elements have a specific direction, or that they must be configured and operated in a specific direction, and therefore cannot be understood as limiting this application. 【0012】 Unless otherwise defined, all technical and scientific terms used in this paper have the same meaning as those commonly understood by those skilled in the art. In this paper, the terms used in the specification are for illustrative purposes only and do not limit the application. 【0013】 Embodiments of the present application disclose a battery structure, which may specifically be a capacitive battery structure of lithium thionyl chloride. 【0014】 Referring to Figures 1 to 7, the battery structure comprises a first case 1 and a battery 11 mounted inside the first case 1, with a first positive electrode output member 12 provided at the positive terminal of the battery 11, and the cover plate 111 of the battery 11 being the negative terminal of the battery 11. The battery structure further comprises a second case 2 and a capacitor 21 mounted inside the second case 2, with a second positive electrode output member 22 provided at the positive terminal of the capacitor 21, and a negative electrode output member 23 provided at the negative terminal of the capacitor 21. The first case 1 and the second case 2 are mounted and combined, the first positive electrode output member 12 and the second positive electrode output member 22 are electrically connected, and the cover plate 111 and the negative electrode output member 23 are electrically connected. 【0015】 In this specific embodiment, the battery structure employs a design of two cases that can be mounted and combined, specifically providing a mounting structure for two cases, a first case 1 and a second case 2. The battery 11 and the capacitor 21 are mounted separately, that is, the battery 11 is mounted individually in the first case 1, and the capacitor 21 is mounted individually in the second case 2. Then the first case 1 and the second case 2 are mounted together as a single unit. Furthermore, the first positive electrode output member 12 of the internal battery 11 and the second positive electrode output member 22 of the capacitor 21 are electrically connected, and the cover plate 111 of the battery 11 and the negative electrode output member 23 of the capacitor 21 are electrically connected, thereby ensuring that the battery structure can be used normally. As can be seen from the above, this invention does not require the use of the potting sealing process of the prior art for manufacturing, but specifically employs a two-case mounting process for manufacturing. The mounting process of this new design simplifies the assembly process, avoids the need for complex production processes such as potting sealing during production, effectively avoids quality and safety problems that are likely to occur during production, and at the same time reduces the production and assembly costs of the battery 11, increases the overall efficiency of the production process, and improves the overall economic effect. 【0016】 More importantly, the dimensions of this battery structure can be specifically designed during the production and manufacturing process, and the designed dimensions can be matched to the dimensions of battery chambers used in existing applications, eliminating the need to create new molds. At the same time, the assembly process is simple, and it can be used in conjunction with battery chambers of existing application equipment. Furthermore, it supports the use of multiple series or multiple parallel connections, and the overall appearance of the combination is more aesthetically pleasing and safer. 【0017】 In one or more embodiments, the battery 11 may specifically be a capacitive battery of thionyl chloride lithium. In one or more embodiments, it may also be a capacitive battery of thionyl chloride lithium with a rated capacity corresponding to a power-type battery of thionyl chloride lithium. For example, the rated capacity may be 13 Ah, 14 Ah, 15 Ah, etc. By doing so, the capacity of the battery is maintained such that it meets the capacity of the corresponding power-type battery without changing the design of the internal structure. For example, it includes components such as ordinary metallic lithium, a carbon positive electrode, a separator, an electrolyte, a current collector, a steel shell, and a cover plate. 【0018】 In one or more embodiments, the height of the battery 11 itself is smaller than the height of an existing thionyl chloride lithium battery. For example, the range of the overall height h1 of the battery 11 may be 30 mm ≤ h1 ≤ 50 mm. By doing so, while the height is reduced, the battery 11 corresponds to the corresponding capacity of a power-type battery, and the cost of the battery 11 and the space occupied by the battery 11 can be effectively saved. 【0019】 In one or more embodiments, the range of the case wall thickness d2 of the first case 1 may be 0.1 mm ≤ d2 ≤ 1 mm. For example, the case wall thickness d2 of the first case 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 some other embodiments, the case wall thickness d2 of the first case 1 may be other values within the range of 0.1 mm ≤ d2 ≤ 1 mm. 【0020】 In one or more embodiments, it is preferable that the range of the case wall thickness d3 of the second case 2 is 0.1 mm ≤ d3 ≤ 1 mm. For example, the case wall thickness d3 of the second case 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 some other embodiments, the case wall thickness d3 of the second case 2 may be other values within the range of 0.1 mm ≤ d3 ≤ 1 mm. 【0021】 In one or more embodiments, it is preferable that the range of the self-height h1 of the battery 11 is 30 mm ≤ h1 ≤ 50 mm. For example, the self-height h1 of the battery 11 may 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 self-height h1 of the battery 11 may be other values within the range of 30 mm ≤ h1 ≤ 50 mm. 【0022】 In one or more embodiments, it is preferable that the range of the self-height h2 of the first case 1 is 30 mm ≤ h2 ≤ 50 mm. For example, the self-height h2 of the first case 1 may 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 self-height h2 of the first case 1 may be other values within the range of 30 mm ≤ h2 ≤ 50 mm. 【0023】 In one or more embodiments, it is preferable that the range of the self-height h3 of the second case 2 is 20 mm ≤ h3 ≤ 30 mm. For example, the self-height h3 of the second case 2 may 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 some other embodiments, the self-height h3 of the second case 2 may be other values within the range of 20 mm ≤ h3 ≤ 30 mm. 【0024】 In one or more embodiments, the range of the overall height h4 formed by attaching and combining the first case 1 and the second case 2 is preferably 50 mm ≤ h4 ≤ 80 mm. For example, the overall height h4 formed by attaching and combining the first case 1 and the second case 2 may 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 some other embodiments, the overall height h4 formed by attaching and combining the first case 1 and the second case 2 may be any other value within the range of 50 mm ≤ h4 ≤ 80 mm. 【0025】 In one or more embodiments, the capacitor 21 may have a diameter of 15 mm and a height of 20 mm, and the second case 2 in which the capacitor 21 is mounted may have a diameter of 34 mm and a height of 21 mm to better suit the actual situation. 【0026】 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 in the insulating member 13, and the first positive electrode output member 12 is mounted in the first mounting groove 131. In a specific mounting structure, the insulating member 13 is specifically attached 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 insulating member 13 is provided with a first mounting groove 131. The first positive electrode output member 12 can be engaged in the first mounting groove 131, effectively positioning and fixing the first positive electrode output member 12, thereby improving overall structural stability and structural strength. 【0027】 At the same time, in order to enable the first positive electrode output member 12 to be connected more compactly to the positive terminal of the battery 11, a through hole 133 may be provided through the insulating member 13, so that the pole of the positive electrode of the battery 11 can pass through the through hole 133 and be connected to the first positive electrode output member 12, thereby forming the positive terminal of the battery 11. 【0028】 In one or more embodiments, the insulating member 13 may specifically be a plastic lid made of a plastic material, thereby preventing other workpieces from coming into contact with the battery 11 and causing unwanted short-circuit problems, and improving overall safety. 【0029】 In one or more embodiments, the insulating member 13 may be circular in shape, and its diameter may match the diameter of the battery cover plate 111, for example, its diameter may be smaller than or equal to the diameter of the battery cover plate 111. 【0030】 In one or more embodiments, the first positive electrode output member 12 may have a welded piece structure, and its shape may be a straight line, that is, a straight line welded piece. 【0031】 In one or more embodiments, the thickness d1 of the insulating member 13 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 some other embodiments, the thickness d1 of the insulating member 13 may be any other value within the range of 0.1 mm ≤ d1 ≤ 1 mm. 【0032】 In actual use, the cover plate 111 of the battery 11 is the negative terminal of the battery 11. Therefore, in one or more embodiments, a notch 132 is provided through the insulating member 13 to make the structure more compact and to facilitate electrical connection with the negative terminal output member 23 of the capacitor 21. The negative terminal connection area is exposed from a position on the cover plate 111 of the battery 11 facing the notch 132, and the negative terminal output member 23 passes through the notch 132 and is electrically connected to the negative terminal connection area. This avoids interference between the negative terminal output member 23 of the capacitor 21 and the insulating member 13, makes the structure more compact, and saves on the cost of the battery 11 and the space of the battery pack. 【0033】 In one or more embodiments, the number of capacitors 21 can be determined according to the battery 11 actually applied. For example, in one or more embodiments, the number of capacitors 21 may be multiple, specifically three, four, or five, and in the illustrated embodiment, specifically three. In a specific structure, the second positive electrode output member 22 is connected to the positive electrode poles of the multiple capacitors 21, thereby ensuring that the multiple capacitors 21 can operate synchronously and normally, improving overall operating stability. 【0034】 To make the overall structure more compact, in one or more embodiments, a positive output column 221 is provided protruding from one end of the second positive output member 22 facing away from the capacitor 21, and a connecting member 222 is connected to the second positive output member 22. The connecting member 222 is provided beside the circumferentially outer side of the capacitor 21, and the connecting member 222 is electrically connected to the first positive output member 12 and the second positive output member 22, respectively. When actually installed, it was found that multiple capacitors 21 are interposed between the second positive output member 22 connected to the positive electrode pole of the capacitor 21 and the first positive output member 12 connected to the positive electrode pole of the battery 11, and that a certain distance exists between them. Therefore, in order to connect the second positive output member 22 of the capacitor 21 and the first positive output member 12 of the battery 11 more compactly, a connecting member 222 is provided to realize the connection between the second positive output member 22 and the first positive output member 12. At the same time, the connecting member 222 is provided so as to extend from the top part having the positive electrode of the capacitor 21 toward the bottom part having the negative electrode, and more specifically the connecting member 222 is provided beside the circumferential outer side of the capacitor 21, making the structure more compact and saving the cost of the battery 11 and the space of the battery pack. 【0035】 In one or more embodiments, the shape of the second positive electrode output member 22 may specifically be L-shaped, Z-shaped, plum blossom-shaped, or the like, and is not limited thereto. 【0036】 In one or more embodiments, the second positive electrode output member 22 may be a welded piece structure, and its shape may be plum blossom-shaped, that is, a plum blossom-shaped welded piece. 【0037】 In one or more embodiments, the negative electrode output member 23 may be a welded piece structure, and its shape can be designed as a straight line, crescent shape, or the like, depending on the number of capacitors 21. As can be seen from this, in one or more embodiments, the first positive electrode output member 12, the second positive electrode output member 22, and the negative electrode output member 23 are welded piece structures, and the connection by the welded piece method can reduce the production cost and assembly cost of the battery 11 and increase the overall efficiency of the production process. 【0038】 In one or more embodiments, the electrical connection between the connecting member 222 and the first positive electrode output member 12 may be fixed by a welding method such as resistance welding or laser welding. 【0039】 To facilitate the installation of the structure, in one or more embodiments, a contact spring 24 is electrically connected to the negative electrode output member 23, the contact spring 24 is located within a notch 132 of the insulating member 13, and the contact spring 24 is electrically connected to the cover plate 111 of the battery 11. In this way, when specifically installing, the contact spring 24 can be welded first to the cover plate 111 of the battery 11 or the negative electrode output member 23. In some embodiments, because there is ample space and the welding operation is easy, the contact spring 24 is welded to the cover plate 111 of the battery 11. Then, when installing the first case 1 and the second case 2, the unwelded end of the contact spring 24 specifically contacts the negative electrode output member 23, completing the electrical connection between the two. At this position, the spring is used to make physical contact and then fixed by joining the first case 1 and the second case 2, which solves the problem of the difficulty of the spot welding process at this position compared to a process where both ends need to be spot welded. 【0040】 To make the overall structure more compact, in one or more embodiments, a second mounting groove 134 is recessed at one end of the insulating member 13 facing the capacitor 21, and the negative electrode output member 23 is mounted within the second mounting groove 134. In this way, the position of the second mounting groove 134 can be effectively positioned and fixed, improving the overall structural stability and strength, while at the same time making the structure more compact and saving on the cost of the battery 11 and the space required for the battery pack. 【0041】 Since the insulating member 13 has both a first mounting groove 131 and a second mounting groove 134 recessed into it, the first positive output member 12 is mounted in the first mounting groove 131 and the negative output member 23 is mounted in the second mounting groove 134. In order to avoid interference between the first positive output member 12 and the negative output member 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, thereby offsetting the mounting positions of both the first positive output member 12 and the negative output member 23 to avoid interference. 【0042】 In one or more embodiments, the shape of the second mounting groove 134 matches the shape of the negative electrode output member 23, and in one or more embodiments, the shape may be arc-shaped or the crescent shape shown. 【0043】 To facilitate the installation of the capacitor 21 into the first case 1, the top end of the second case 2 that is separated from the first case 1 is left open. This makes it easier to install the capacitor 21 from the open portion, improving operating efficiency. Therefore, to avoid damage to the capacitor 21 due to exposure of the open portion and to improve overall sealing performance, a battery cover 3 is provided on the open portion of the top end of the second case 2, thereby improving overall safety performance. 【0044】 Since a positive electrode output column 221 is provided protruding from the second positive electrode output member 22, an opening 31 is provided through the battery cover 3 to allow for better connection to the external busbar, and the positive electrode output column 221 can extend outside the entire battery structure through the opening 31, thereby ensuring that the battery structure can operate normally. Alternatively, the battery cover 3 may be placed on the top of the first case 1, and then the entire assembly may be heat-shrink packaged in a casing to complete the assembly. [Explanation of Symbols] 【0045】 1...First case, 11...Battery, 111...Cover plate, 12...First positive output component, 13...Insulating component, 131...First mounting groove, 132...Notch, 133...Through hole, 134...Second mounting groove, 2...Second case, 21...Capacitor, 22...Second positive output component, 221...Positive output column, 222...Connecting component, 23...Negative output component, 24...Contact spring, 3...Battery cover, 31...Opening.

Claims

[Claim 1] The device comprises a first case (1) and a battery (11) installed inside the first case (1), and a second case (2) and a capacitor (21) installed inside the second case (2). The battery (11) has a first positive electrode output member (12) at its positive terminal, and its cover plate (111) is at the negative terminal of the battery (11). The capacitor (21) is provided with a second positive output member (22) at its positive terminal and a negative output member (23) at its negative terminal. The first case (1) and the second case (2) are mounted and combined, the first positive output member (12) and the second positive output member (22) are electrically connected, and the cover plate (111) and the negative output member (23) are electrically connected. Battery structure. [Claim 2] An insulating member (13) is fixed to the cover plate (111) of the battery (11), and a first mounting groove (131) is recessed in the insulating member (13) into which the first positive electrode output member (12) is mounted. The battery structure according to claim 1. [Claim 3] The insulating member (13) is provided with a notch (132) passing through it, and the negative electrode connection region is exposed from a position opposite the notch (132) in the cover plate (111) of the battery (11), and the negative electrode output member (23) is electrically connected to the negative electrode connection region by passing through the notch (132). The battery structure according to claim 2. [Claim 4] The first positive electrode output member (12), the second positive electrode output member (22), and the negative electrode output member (23) are welded pieces. The battery structure according to claim 2. [Claim 5] Multiple capacitors (21) are provided, and the second positive electrode output member (22) is connected to the positive electrode poles of the multiple capacitors (21). A positive electrode output column (221), which serves as the positive electrode end of the capacitor (21), is provided protruding from one end of the second positive electrode output member (22) that faces away from the capacitor (21), and a connecting member (222) is connected to the second positive electrode output member (22), which is provided beside the circumferential outer side of the capacitor (21) and is electrically connected to the first positive electrode output member (12) and the second positive electrode output member (22), respectively. The battery structure according to any one of claims 1 to 4. [Claim 6] A contact spring (24) is electrically connected to the negative electrode output member (23), which is located within a notch (132) of the insulating member (13) and electrically connected to the cover plate (111) of the battery (11). The battery structure according to claim 3. [Claim 7] A second mounting groove (134) is recessed at one end of the insulating member (13) facing the capacitor (21), the negative electrode output member (23) is mounted in the second mounting groove (134), and the depth of the first mounting groove (131) is greater than the depth of the second mounting groove (134). The top end of the second case (2) that is separated from the first case (1) is provided open, and a battery cover (3) with an opening (31) passing through the open portion of the top end of the second case (2) is provided. The battery structure according to claim 2. [Claim 8] The range of the thickness d1 of the insulating member (13) is 0.1 mm ≤ d1 ≤ 1 mm. The range of the case wall thickness d2 in the first case (1) is 0.1 mm ≤ d2 ≤ 1 mm. The range of the case wall thickness d3 in the second case (2) described above is 0.1 mm ≤ d3 ≤ 1 mm. The battery structure according to any one of claims 2 to 4, 6, and 7. [Claim 9] The height h1 of the battery (11) is in the range of 30 mm ≤ h1 ≤ 50 mm. The range of the height h2 of the first case (1) described above is 30 mm ≤ h2 ≤ 50 mm. The range of the height h3 in the second case (2) described above may be 20 mm ≤ h3 ≤ 30 mm. The range of the overall height h4 formed by attaching and combining the first case (1) and the second case (2) is 50 mm ≤ h4 ≤ 80 mm. The battery structure according to any one of claims 2 to 4, 6, and 7. [Claim 10] A battery structure comprising the one described in any one of claims 1 to 4, claim 6, and claim 7, Battery pack.

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