Low-internal-resistance welding-free lithium battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a low-internal-resistance welding-free lithium battery and electric equipment, and the low-internal-resistance welding-free lithium battery comprises a battery pack; the two ends of the battery pack are connected with supports, glue curing holes are formed in the supports, the ends, away from the battery pack, of the supports are connected with current-carrying pieces, glue inlet holes are formed in the current-carrying pieces, the current-carrying pieces at least partially cover the glue curing holes, and the current-carrying pieces, the glue curing holes and the end faces of the battery cell pole columns form curing cavities which are filled with conductive glue layers. And the battery cell pole, the bracket and the current-carrying sheet are bonded and fixed. Through the design of the conductive adhesive layer, the requirements on operators and operation equipment are low; and through the design of the glue inlet hole and the glue curing hole, the purpose of reducing the internal resistance is achieved. And when after-sales and repair are needed, the conductive adhesive layer can be stripped by using an adhesive remover, so that after-sales maintenance of the product is safe and reliable. Therefore, the connecting structure of the lithium battery disclosed by the utility model is higher in practicability.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a low internal resistance solderless lithium battery and electric device. Background Technology

[0002] In the production process of lithium batteries, in order to ensure that the current can be transmitted stably and reliably, the current-carrying cells need to be installed on the corresponding battery pack.

[0003] Currently, current-carrier cells are typically connected to the cell terminals within the battery pack via resistance welding, laser welding, soldering, or ultrasonic welding. However, this method requires specialized welding equipment and skilled operators, presenting inconvenience. Furthermore, variations in the contact area during welding can lead to higher overall internal resistance in the battery, negatively impacting its performance. Additionally, these welding processes have irreversible effects on returned products, necessitating their scrapping and incurring significant material costs. Therefore, the existing connection structures for lithium batteries have limited practicality. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a low internal resistance, solderless lithium battery and electric device.

[0005] In a first aspect, this utility model provides a low internal resistance solderless lithium battery, comprising: a battery pack;

[0006] Both ends of the battery pack are connected to brackets, and the brackets have multiple adhesive curing holes. Each adhesive curing hole is arranged opposite to each cell terminal in the battery pack. The end of the bracket away from the battery pack is connected to a current-carrying sheet. The current-carrying sheet has multiple glue inlet holes evenly distributed on it, and each glue inlet hole is arranged opposite to each adhesive curing hole. The current-carrying sheet at least partially covers the adhesive curing holes. The current-carrying sheet, the adhesive curing holes, and the end faces of the cell terminals form a curing cavity. The curing cavity is filled with a conductive adhesive layer to bond and fix the cell terminals, the brackets, and the current-carrying sheet.

[0007] In some embodiments, the width of the adhesive curing hole is greater than the width of the adhesive inlet hole.

[0008] In some embodiments, the cross-sectional area of ​​the adhesive curing hole at the end near the battery pack is greater than the cross-sectional area at the end away from the battery pack.

[0009] In some embodiments, the depth of the adhesive curing hole is 0.5 mm to 1.5 mm.

[0010] In some embodiments, the cross-sectional shape of the adhesive inlet hole is set to a cross shape.

[0011] In some embodiments, the current-carrying plate per 1mm 2 The maximum current is 8A.

[0012] In some embodiments, the support is provided with a limiting member for limiting the current-carrying plate.

[0013] In some embodiments, the limiting member includes a plurality of limiting blocks, which are arranged in a rectangular array.

[0014] In some embodiments, the conductive adhesive layer is made of silver paste and photosensitive adhesive.

[0015] Secondly, this utility model provides an electric device, which is a low internal resistance solderless lithium battery according to any of the above embodiments.

[0016] In summary, this utility model has at least the following advantages:

[0017] The low internal resistance, solderless lithium battery provided by this utility model achieves a solderless connection by using a conductive adhesive layer to bond and fix the current-carrying cells and the cell terminals within the battery pack. This simplifies the manufacturing process and reduces the requirements for operators and equipment. Furthermore, the design of the adhesive inlet and curing holes increases the contact area between the current-carrying cells and the cell terminals, thereby reducing internal resistance. This results in higher safety performance, lower heat generation, and longer battery life. In case of after-sales service or repair, the conductive adhesive layer can be removed using an adhesive remover, preventing damage to the cell's surface structure. This makes product assembly, manufacturing, and after-sales maintenance safer and more reliable. Therefore, the connection structure of the lithium battery in this application is more practical. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a low internal resistance, solderless lithium battery according to an embodiment of the present invention.

[0019] Figure 2 This is an exploded structural diagram of a low internal resistance solderless lithium battery according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the current-carrying plate on the support according to an embodiment of the present invention.

[0021] Marked in the image:

[0022] 10. Low internal resistance solderless lithium battery; 100. Battery pack; 200. Bracket; 210. Adhesive curing hole; 220. Limiting component; 300. Current carrier plate; 310. Adhesive inlet hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] In the following embodiments and accompanying drawings, reference is made to Figure 1 The coordinate system is defined with the direction of the arrow pointing to the X-axis as right, the direction of the arrow pointing to the Y-axis as front, and the direction of the arrow pointing to the Z-axis as up.

[0026] Example 1:

[0027] like Figures 1 to 3 As shown, in this embodiment, a low internal resistance solderless lithium battery is provided, including: a battery pack 100; both ends of the battery pack 100 are connected to a bracket 200, the bracket 200 has a plurality of glue curing holes 210, each glue curing hole 210 is arranged opposite to each cell terminal in the battery pack 100, the end of the bracket 200 away from the battery pack 100 is connected to a current-carrying sheet 300, the current-carrying sheet 300 has a plurality of glue inlet holes 310 evenly arranged, each glue inlet hole 310 is arranged opposite to each glue curing hole 210, and the current-carrying sheet 300 at least partially covers the glue curing holes 210, the end face of the current-carrying sheet 300, the glue curing holes 210 and the cell terminal forms a curing cavity, the curing cavity is filled with a conductive adhesive layer to bond and fix the cell terminal, the bracket 200 and the current-carrying sheet 300.

[0028] Specifically, the battery pack 100 includes multiple battery cells, each with a terminal post on its end face; brackets 200 are installed at both the top and bottom of the battery pack 100, and the material of the brackets 200 can be selected, but is not limited to, plastic; multiple adhesive curing holes 210 are evenly distributed on the brackets 200; multiple current-carrying plates 300 are arranged on the end of the brackets 200 away from the battery pack 100, and each current-carrying plate 300 has multiple adhesive inlet holes 310 evenly distributed; and the center line of each adhesive inlet hole 310, the center line of each adhesive curing hole 210, and the center line of each cell terminal post are mutually coincident, that is, each adhesive inlet hole 310, Each adhesive curing hole 210 and each cell terminal are arranged opposite each other, and the orthographic projection of the adhesive inlet hole 310 is located inside the adhesive curing hole 210, so that the surface of the current carrier 300 is at least partially covered by the adhesive curing hole 210. At this time, the end surface of the current carrier 300 near the battery pack 100, the inner side wall of the adhesive curing hole 210 and the end face of the cell terminal form a curing cavity. Then, conductive adhesive is poured into the curing cavity from the adhesive inlet hole 310, thereby forming a conductive adhesive layer in the curing cavity, so that the conductive adhesive layer can bond and fix the cell terminal, the bracket 200 and the current carrier 300 in the battery pack 100.

[0029] During preparation: The current carrier sheet 300 is placed in the corresponding support 200 position, so that each glue inlet hole 310 and each glue curing hole 210 corresponds to each cell terminal. The corresponding amount of conductive glue is poured into the curing chamber through the glue inlet hole 310. Then, the product with the conductive glue is irradiated by an ultraviolet lamp to quickly cure and form a conductive glue layer. At this time, the current carrier sheet 300 can be bonded and fixed to the cell terminal in the battery pack 100.

[0030] It is worth noting that during connection, the conductive adhesive layer design allows for bonding and fixing of the current-carrying sheet 300 and the cell terminals within the battery pack 100, achieving a solderless connection. Therefore, the manufacturing process is simple, requiring less skill from operators and less sophisticated equipment. Furthermore, the design of the adhesive inlet hole 310 and the adhesive curing hole 210 increases the contact area between the current-carrying sheet 300 and the cell terminals, thereby reducing internal resistance. This results in higher safety performance, lower heat generation, and a longer battery pack 100 range. In the event of after-sales service or repairs, the conductive adhesive layer can be removed using an adhesive remover, preventing damage to the cell's surface structure. This makes product assembly, manufacturing, and after-sales maintenance safer and more reliable. Therefore, the lithium battery connection structure of this application is more practical.

[0031] It is understood that the specific layout of the current-carrying sheet 300 is subject to actual production conditions and may be arranged in different sizes and shapes according to production needs. No specific limitations are imposed here, and the specific layout of the glue inlet holes 310 corresponds to the size and shape of the current-carrying sheet 300. For example, when the current-carrying sheet 300 is a narrow single sheet, the multiple glue inlet holes 310 are arranged in a straight line; when the current-carrying sheet 300 is a wide sheet, the multiple glue inlet holes 310 are arranged in a rectangular array.

[0032] To increase the bonding area between the current-carrying plate 300 and the cell terminals within the battery pack 100, such as... Figure 2 and Figure 3 As shown, in some embodiments, the width of the adhesive curing hole 210 is greater than the width of the adhesive inlet hole 310.

[0033] Specifically, by making the width of the adhesive inlet hole 310 smaller and the width of the adhesive curing hole 210 larger, the surface area of ​​the current-carrying sheet 300 covering the outside of the adhesive curing hole 210 is larger, thereby increasing the contact area between the conductive adhesive and the current-carrying sheet 300. This effectively increases the bonding area between the current-carrying sheet 300 and the cell terminals in the battery pack 100.

[0034] To enhance the practicality of the glue inlet 310, such as Figure 2 and Figure 3 As shown, in some embodiments, the cross-sectional shape of the glue inlet 310 is set to a cross shape.

[0035] Specifically, the cross-sectional shape of the adhesive inlet 310 is set to a cross shape. That is, the adhesive inlet 310 can be, but is not limited to, a cross-shaped opening. This can ensure the adhesive application effect and the contact area between the current-carrying sheet 300 and the cell terminals in the battery pack 100. It can also be understood that, compared with a circular adhesive inlet 310, a cross-shaped hole can guide the adhesive to the periphery of the adhesive curing hole 210 more quickly, rather than concentrating it in one area, causing the adhesive to overflow in the middle while the adhesive content around the periphery is low. Therefore, the cross-shaped hole is more practical.

[0036] To ensure a sufficient contact area between the current-carrying plate 300 and the cell terminal while also making the bonding more secure, such as Figure 2 and Figure 3 As shown, in some embodiments, the cross-sectional area of ​​the adhesive curing hole 210 near the battery pack 100 is larger than the cross-sectional area of ​​the end away from the battery pack 100.

[0037] Specifically, the width of the adhesive curing hole 210 at the end near the battery pack 100 is greater than the width at the end away from the battery pack 100, thereby allowing the adhesive curing hole 210 to hold more conductive adhesive. The conductive adhesive can fully contact the battery cell terminals on the battery pack 100, and the contact area between the two is larger, resulting in a more stable bond.

[0038] To ensure bonding effectiveness, in some embodiments, the depth of the adhesive curing hole 210 is 0.5 mm to 1.5 mm.

[0039] Specifically, by controlling the depth of the adhesive curing hole 210, the height of the conductive adhesive layer is ensured, thereby controlling the bonding strength of the conductive adhesive layer. The depth of the adhesive curing hole 210 is determined based on actual production conditions and is not limited here. In one embodiment, the depth of the adhesive curing hole 210 is 0.5 mm; in another embodiment, the depth of the adhesive curing hole 210 is 1 mm; and in yet another embodiment, the depth of the adhesive curing hole 210 is 1.5 mm.

[0040] To facilitate the use of the current carrier plate 300, in some embodiments, the current carrier plate 300 is spaced 1 mm apart. 2 The maximum current is 8A.

[0041] Thus, when the current-carrying plate 300 is in use, the maximum current value that its conductor per unit area can continuously carry for a long time without overheating or damage is 8A, thereby ensuring the normal use of the current-carrying plate 300.

[0042] In order to enable the use of the current carrier 300, in some embodiments, the current carrier 300 is made of nickel-plated steel strip.

[0043] Using nickel-plated steel strip as the material for the current carrier 300 has many advantages, including excellent conductivity, high strength and hardness, good corrosion resistance, improved lithium battery performance, simplified production process, easy cleaning and maintenance, and reduced costs.

[0044] To facilitate the use of the conductive adhesive layer, in some embodiments, the conductive adhesive layer is made of silver paste and photosensitive adhesive.

[0045] Specifically, by combining silver paste and photosensitive adhesive with other materials in a specific ratio to create a conductive adhesive, a conductive layer with excellent conductivity and adhesion can be formed. The conductive adhesive formed by combining silver paste and photosensitive adhesive is a conventional conductive adhesive and can be purchased and used directly from the market. It is understood that the material of the conductive adhesive layer depends on actual production needs and is not limited here. For example, the material of the conductive adhesive layer can also be set to a conventional conductive adhesive.

[0046] Example 2

[0047] This embodiment is a further implementation of Embodiment 1, such as... Figure 2 and Figure 3 As shown, in this embodiment, the bracket 200 is provided with a limiting member 220 for limiting the current-carrying plate 300.

[0048] Specifically, the edge of the limiting member 220 abuts against the outer side of the current-carrying plate 300, thereby limiting the current-carrying plate 300 and preventing it from shifting on the support 200. The limiting member 220 may be, but is not limited to, four limiting blocks distributed in a rectangular array.

[0049] In some embodiments, the support 200 has multiple through holes, and the current-carrying plate 300 has multiple heat dissipation holes, with each heat dissipation hole facing a through hole.

[0050] Specifically, by providing through holes and heat dissipation holes, most of the heat generated inside the battery pack 100 during charging and discharging can be dissipated, thus achieving heat dissipation. This helps improve the safety and stability of the lithium battery and extend its service life. When the current-carrying sheet 300 is a relatively wide sheet, each adhesive insertion hole 310 is located on both sides of the current-carrying sheet 300, and the heat dissipation hole is located in the middle of the current-carrying sheet 300. Each limiting member 220 is circumferentially arranged outside a through hole, and each limiting member 220 protrudes from a heat dissipation hole to limit the current-carrying sheet 300.

[0051] Example 3

[0052] An electric device is provided, including a low internal resistance solderless lithium battery 10 of embodiment 1 or 2.

[0053] Specifically, the low-internal-resistance, solderless lithium battery 10 manufactured using the connection structure of this application has a simple manufacturing process, requires very little equipment, and is suitable for all operators; it generates less heat, has higher safety performance, and the battery pack 100 has a longer range. Therefore, it is highly practical and easy to use for driving electric equipment.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0056] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0057] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A low internal resistance, solderless lithium battery, characterized in that, include: Battery pack (100); Both ends of the battery pack (100) are connected to brackets (200). The brackets (200) have multiple adhesive curing holes (210). Each adhesive curing hole (210) is arranged opposite to each cell terminal in the battery pack (100). One end of the bracket (200) away from the battery pack (100) is connected to a current-carrying sheet (300). The current-carrying sheet (300) has multiple glue inlet holes (310) evenly arranged. Each glue inlet hole (310) is arranged opposite to each adhesive curing hole (210). The current-carrying sheet (300) at least partially covers the adhesive curing holes (210). The current-carrying sheet (300), the adhesive curing holes (210), and the end faces of the cell terminals form a curing cavity. The curing cavity is filled with a conductive adhesive layer to bond and fix the cell terminals, the brackets (200), and the current-carrying sheet (300).

2. The low internal resistance solderless lithium battery according to claim 1, characterized in that, The width of the glue curing hole (210) is greater than the width of the glue inlet hole (310).

3. The low internal resistance solderless lithium battery according to claim 1, characterized in that, The cross-sectional area of ​​the adhesive curing hole (210) near the end of the battery pack (100) is greater than the cross-sectional area away from the end of the battery pack (100).

4. The low internal resistance solderless lithium battery according to claim 1, characterized in that, The depth of the adhesive curing hole (210) is 0.5 mm to 1.5 mm.

5. The low internal resistance solderless lithium battery according to claim 1, characterized in that, The cross-sectional shape of the glue inlet hole (310) is set to a cross shape.

6. The low internal resistance solderless lithium battery according to claim 1, characterized in that, The current carrier plate (300) per 1mm 2 The maximum current is 8A.

7. The low internal resistance solderless lithium battery according to any one of claims 1 to 6, characterized in that, The bracket (200) is provided with a limiting member (220) for limiting the current-carrying plate (300).

8. The low internal resistance solderless lithium battery according to claim 7, characterized in that, The limiting member (220) includes multiple limiting blocks, which are arranged in a rectangular array.

9. The low internal resistance solderless lithium battery according to claim 7, characterized in that, The conductive adhesive layer is made of silver paste and photosensitive adhesive.

10. An electric device, characterized in that, The low internal resistance solderless lithium battery (10) according to any one of claims 1 to 9.

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