Steel shell battery

Abstract

The utility model relates to a steel shell battery. The steel shell battery comprises a battery shell, a conductive connecting piece and insulating glue, the battery shell is provided with a positive end face and a negative end face which are oppositely arranged. The positive end face and the negative end face are respectively connected with the terminal component through conductive connecting pieces, each conductive connecting piece comprises a connecting section, an insulating section and a leading-out section which are connected in sequence, the positive end face and the negative end face are respectively connected with the connecting sections of the corresponding conductive connecting pieces, and the leading-out sections are used for being connected with the terminal component. And the insulating glue is adhered to the periphery of the insulating section. The insulation paste not only can prevent the short circuit of the battery shell and the conductive connecting piece caused by the contact between the insulation section and the battery shell, but also can prevent the short circuit of the conductive connecting piece and the terminal component caused by the contact between the insulation section and the terminal component. And the insulating glue can be pre-processed into the conductive connecting piece bonded with the insulating glue by adopting hot-pressing equipment, so that an insulating layer does not need to be arranged on the battery shell in a plurality of processes during assembly, the structure of the steel shell battery is simplified, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to steel shell batteries. Background Art

[0002] The outer shell of a steel shell battery has conductive fixing characteristics. The battery outer shell is connected to a terminal device through a conductive connecting piece for power supply. However, in order to prevent short circuit between the battery outer shell and the conductive connecting piece, the conductive connecting piece needs to be insulated from the battery outer shell.

[0003] In related technologies, generally an insulating gasket is provided between the conductive connecting piece and the battery outer shell. However, since the battery outer shell is a three-dimensional structure while the insulating gasket is a planar structure, therefore, it is necessary to attach the insulating gasket to different surfaces of the battery outer shell in multiple processes respectively, resulting in a complex structure of the entire steel shell battery and low production efficiency. Summary of the Utility Model

[0004] Based on this, in view of the problems of complex structure and low production efficiency of the entire steel shell battery, it is necessary to provide a steel shell battery.

[0005] A steel shell battery, the steel shell battery includes:

[0006] A battery outer shell having a positive end face and a negative end face disposed opposite to each other;

[0007] A conductive connecting piece, the positive end face and the negative end face are respectively connected to a terminal component through the corresponding conductive connecting piece. The conductive connecting piece includes a connecting section, an insulating section, and a lead-out section connected in sequence. The positive end face and the negative end face are respectively connected to the connecting section of the corresponding conductive connecting piece, and the lead-out section is used to connect to the terminal component;

[0008] Insulating glue, and the insulating glue is adhesively bonded to the outer periphery of each insulating section respectively.

[0009] In one embodiment, the conductive connecting piece is a strip-shaped sheet structure. The insulating glue includes a first glue layer and a second glue layer. The first glue layer and the second glue layer are respectively adhesively bonded to two sides of the strip-shaped sheet structure. The two sides of the first glue layer and the second glue layer along the width direction respectively extend out of the conductive connecting piece, and the part of the first glue layer extending out of the conductive connecting piece is adhesively bonded to the part of the second glue layer extending out of the conductive connecting piece.

[0010] In one embodiment, the thickness of both the first glue layer and the second glue layer is 0.02 mm - 0.08 mm.

[0011] In one embodiment, the lead-out section is located on one side of the battery outer shell close to the positive end face or on one side of the battery outer shell close to the negative end face.

[0012] In one embodiment, the battery housing has a side wall located between the positive end face and the negative end face;

[0013] The conductive connection member includes a first conductive connection member. The connection section of the first conductive connection member is connected to the positive end face, and the lead-out section of the first conductive connection member is located on one side of the positive end face;

[0014] The conductive connection member includes a second conductive connection member. The connection section of the second conductive connection member is connected to the negative end face, and the insulating section of the second conductive connection member passes through and closely adheres to the outside of the side wall, so that the lead-out section of the second conductive connection member is located on one side of the positive end face.

[0015] In one embodiment, the insulating section of the first conductive connection member includes a noise reduction section, and the noise reduction section adheres to the positive end face.

[0016] In one embodiment, the noise reduction section is an arc structure.

[0017] In one embodiment, the battery housing has a side wall located between the positive end face and the negative end face;

[0018] The conductive connection member includes a first conductive connection member. The connection section of the first conductive connection member is connected to the positive end face, and the insulating section of the first conductive connection member passes through and closely adheres to the outside of the side wall, so that the lead-out section of the first conductive connection member is located on one side of the negative end face;

[0019] The conductive connection member includes a second conductive connection member. The connection section of the second conductive connection member is connected to the negative end face, and the lead-out section of the second conductive connection member is located on one side of the negative end face.

[0020] In one embodiment, a limiting groove is formed on the battery housing, and the insulating section of at least one of the conductive connection members cooperates with the limiting groove.

[0021] In one embodiment, the battery housing includes a housing and an end cover buckled outside the housing, and the limiting groove is formed on the end cover.

[0022] In the above steel shell battery, an insulating adhesive is bonded to the outer side of the insulating section of the conductive connecting member. The insulating adhesive can not only prevent the short circuit between the battery shell and the conductive connecting member caused by the direct contact between the insulating section and the battery shell, but also prevent the short circuit between the conductive connecting member and the terminal component caused by the contact between the insulating section and the terminal component. Moreover, for the conductive connecting member bonded by the insulating adhesive, the conductive connecting member bonded with the insulating adhesive can be prefabricated by a hot pressing device. During assembly, there is no need to set up an insulating layer on the battery shell in multiple processes, which simplifies the structure of the steel shell battery and improves the production efficiency. In addition, the insulating adhesive is bonded to the outer periphery of the insulating section, enabling the insulating adhesive to closely fit the insulating section, thereby reducing the change in the volume of the insulating section and facilitating the expansion of the applicable range of the steel shell battery. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a steel shell battery from one perspective in an embodiment.

[0024] Figure 2 It is a schematic structural diagram of a steel shell battery from another perspective in an embodiment.

[0025] Figure 3 It is an exploded structural diagram of a steel shell battery in an embodiment.

[0026] Figure 4 It is a schematic structural diagram of a steel shell battery with no limiting groove opened on the end cover in an embodiment.

[0027] Figure 5 It is a schematic structural diagram of a steel shell battery with a limiting groove opened on the end cover in an embodiment.

[0028] Reference Numerals: 100, battery shell; 110, positive electrode end face; 120, negative electrode end face; 130, side wall; 140, housing; 150, end cover; 151, limiting groove;

[0029] 210, connecting section; 220, insulating section; 221, noise reduction section; 222, bending section; 230, lead-out section; 240, first conductive connecting member; 250, second conductive connecting member;

[0030] 300, insulating adhesive; 310, first adhesive layer; 320, second adhesive layer. Detailed Description of the Embodiment

[0031] To make the above objects, features, and advantages of the present application more apparent and understandable, the following detailed description of the specific embodiments of the present application will be given with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0033] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if there is a term "plural", the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0034] In the present application, unless otherwise clearly specified and limited, if there are terms such as "installed", "connected", "joined", "fixed", etc., these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0036] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0037] Referring to Figures 1 - 3 , a steel shell battery provided by an embodiment of the present application includes a battery outer shell 100, a conductive connecting member, and an insulating adhesive 300. The battery outer shell 100 has a positive end face 110 and a negative end face 120 which are oppositely arranged. The positive end face 110 and the negative end face 120 are respectively connected to terminal components through corresponding conductive connecting members. The conductive connecting member includes a connecting section 210, an insulating section 220, and a lead-out section 230 which are connected in sequence. The positive end face 110 and the negative end face 120 are respectively connected to the connecting section 210 of the corresponding conductive connecting member, and the lead-out section 230 is used to connect to terminal components. Insulating adhesives 300 are respectively bonded to the outer peripheries of the insulating sections 220.

[0038] In this embodiment, an insulating adhesive 300 is bonded to the outside of the insulating section 220 of the conductive connecting member. The insulating adhesive 300 can both prevent the short circuit between the battery outer shell 100 and the conductive connecting member caused by the direct contact between the insulating section 220 and the battery outer shell 100, and prevent the short circuit between the conductive connecting member and the terminal components caused by the contact between the insulating section 220 and the terminal components. And since the insulating adhesive 300 bonds part of the conductive connecting member, the conductive connecting member bonded with the insulating adhesive 300 can be pre-processed by a hot pressing device. During assembly, there is no need to set an insulating layer on the battery outer shell 100 in multiple processes, which simplifies the structure of the steel shell battery and improves production efficiency. In addition, the insulating adhesive 300 is bonded to the outer periphery of the insulating section 220, which can make the insulating adhesive 300 closely fit with the insulating section 220, thereby reducing the change in the volume of the insulating section 220 and facilitating the expansion of the applicable range of the steel shell battery.

[0039] Among them, the positive end face 110 corresponds to the positive electrode of the battery, and the negative end face 120 corresponds to the negative electrode of the battery. The positive end face 110 is connected to the positive electrode of the terminal component through the corresponding conductive connecting member, and the negative end face 120 is connected to the negative electrode of the terminal component through the corresponding conductive connecting member.

[0040] In some embodiments, in combination with Figure 3, the conductive connecting member is in a strip-shaped sheet structure. The insulating adhesive 300 includes a first adhesive layer 310 and a second adhesive layer 320. The first adhesive layer 310 and the second adhesive layer 320 are respectively bonded to two sides of the strip-shaped sheet structure. The two sides of the first adhesive layer 310 and the second adhesive layer 320 along the width direction respectively extend out of the conductive connecting member, and the part of the first adhesive layer 310 extending out of the conductive connecting member is bonded to the part of the second adhesive layer 320 extending out of the conductive connecting member.

[0041] In this embodiment, the conductive connecting member bonded with the insulating adhesive 300 can be prefabricated in advance by prefabrication means to simplify the general assembly process and improve production efficiency. Specifically, the insulating adhesive 300 includes a first adhesive layer 310 and a second adhesive layer 320. The first adhesive layer 310 is hot-pressed and bonded to one side of the insulating section 220, and the second adhesive layer 320 is hot-pressed and bonded to the other side of the insulating section 220. And the two sides of the first adhesive layer 310 and the second adhesive layer 320 along the width direction respectively extend out of the conductive connecting member, so that the extending part of the first adhesive layer 310 is hot-pressed and bonded to the extending part of the second adhesive layer 320, thereby bonding the entire insulating section 220 to prevent the conductive connecting member from contacting the battery housing 100 and short-circuiting, or the insulating section 220 from contacting the terminal components and short-circuiting.

[0042] At the same time, since the first adhesive layer 310 and the second adhesive layer 320 are respectively hot-pressed and bonded to the insulating section 220, that is, the insulating adhesive 300 is closely attached to the insulating section 220. Therefore, it can effectively reduce the total thickness of the insulating section 220 bonded with the insulating layer, which is convenient for being applied to smaller-sized terminal electrical appliances.

[0043] In some embodiments, the thicknesses of both the first adhesive layer 310 and the second adhesive layer 320 are 0.02 mm - 0.08 mm.

[0044] Specifically, the insulating adhesive 300 is a PI-based high-temperature adhesive tape and a PET heat-shrinkable film. When in use, the PI-based high-temperature adhesive tape or the PET heat-shrinkable film is press-bonded to the surface of the insulating section 220 by a hot-pressing method. Among them, the thickness of the PI-based high-temperature adhesive tape or the PET heat-shrinkable film is 0.02 mm - 0.08 mm. Using the insulating adhesive 300 with a thickness of only 0.02 mm - 0.08 mm will not excessively increase the thickness of the insulating section 220 after being bonded to the surface of the insulating section 220, and can also achieve the purpose of insulation.

[0045] In some embodiments, the lead-out section 230 is located on one side of the battery housing 100 close to the positive end face 110 or on one side of the battery housing 100 close to the negative end face 120.

[0046] In actual use, the positions of the steel shell battery and the terminal components can be set according to the internal space of the actual product. When the lead-out section 230 is located on the side of the battery housing 100 close to the positive end face 110, the terminal components are located on the side of the positive end face 110 of the battery housing 100; when the lead-out section 230 is located on the side of the battery housing 100 close to the negative end face 120, the terminal components are located on the side of the negative end face 120 of the battery housing 100.

[0047] In some of these embodiments, in combination with Figure 1 and Figure 2 , the battery housing 100 has a side wall 130 located between the positive end face 110 and the negative end face 120. The conductive connecting member includes a first conductive connecting member 240. The connecting section 210 of the first conductive connecting member 240 is connected to the positive end face 110, and the lead-out section 230 of the first conductive connecting member 240 is located on one side of the positive end face 110. The conductive connecting member includes a second conductive connecting member 250. The connecting section 210 of the second conductive connecting member 250 is connected to the negative end face 120, and the insulating section 220 of the second conductive connecting member 250 passes through and is closely attached to the outside of the side wall 130 so that the lead-out section 230 of the second conductive connecting member 250 is located on one side of the positive end face 110.

[0048] In this embodiment, the terminal components are located on one side of the positive end face 110 of the battery housing 100. The connecting section 210 of the first conductive connecting member 240 is used to connect to the positive end face 110 of the battery, and the lead-out section 230 of the first conductive connecting member 240 is located on one side of the positive end face 110, that is, the first conductive connecting member 240 is used to connect the positive end face 110 to the terminal components located on one side of the positive end face 110 of the steel shell battery. At the same time, the connecting section 210 of the second conductive connecting member 250 is connected to the negative end face 120, and the insulating section 220 of the second conductive connecting member 250 passes through and is closely attached to the outside of the side wall 130 so that the lead-out section 230 of the second conductive connecting member 250 is located on one side of the positive end face 110, that is, the second conductive connecting member 250 connects the negative end face 120 to the terminal components located on one side of the positive end face 110 of the steel shell battery.

[0049] Wherein, the insulating section 220 of the second conductive connecting member 250 is closely attached to the outside of the side wall 130, which is used to reduce the size of the entire steel shell battery. At the same time, the insulating section 220 has insulating properties and can prevent contact short circuit with the side wall 130.

[0050] Furthermore, in combination with Figure 1 , the insulating section 220 of the first conductive connecting member 240 includes a noise reduction section 221, and the noise reduction section 221 is attached to the positive end face 110.

[0051] The noise reduction section 221 is attached to the positive end face 110 for noise reduction. The first conductive connecting member 240 is used to connect the positive end face 110 with the terminal component located on the positive end face 110. That is, the first conductive connecting member 240 is relatively shorter than the second conductive connecting member 250. And since the first conductive connecting member 240 does not need to pass through the side wall 130, the structure of the first conductive connecting member 240 is simple. On this basis, setting the noise reduction section 221 on the first conductive connecting member 240 is more conducive to the manufacture of the noise reduction section 221 than setting the noise reduction section 221 on the second conductive connecting member 250.

[0052] Specifically, the noise reduction section 221 is in an arc structure.

[0053] In this embodiment, the noise reduction section 221 is in an arc structure, which is adapted to the structure of the positive end face 110 of the steel shell battery, facilitating attachment to the positive end face 110. And the noise reduction section 221 is located on the insulating section 220, that is, the noise reduction section 221 will not cause a short circuit with the positive end face 110 of the steel shell battery.

[0054] In some other embodiments, the battery housing 100 has a side wall 130 located between the positive end face 110 and the negative end face 120. The conductive connecting member includes a first conductive connecting member 240. The connecting section 210 of the first conductive connecting member 240 is connected to the positive end face 110. The insulating section 220 of the first conductive connecting member 240 passes through and closely adheres to the outside of the side wall 130, so that the leading-out section 230 of the first conductive connecting member 240 is located on one side of the negative end face 120. The conductive connecting member includes a second conductive connecting member 250. The connecting section 210 of the second conductive connecting member 250 is connected to the negative end face 120. The leading-out section 230 of the second conductive connecting member 250 is located on one side of the negative end face 120.

[0055] In this embodiment, the terminal component is located on one side of the negative end face 120 of the battery housing 100. The connecting section 210 of the first conductive connecting member 240 is used to connect with the positive end face 110 of the battery. The insulating section 220 of the first conductive connecting member 240 passes through and closely adheres to the outside of the side wall 130, so that the leading-out section 230 of the first conductive connecting member 240 is located on one side of the negative end face 120, that is, the first conductive connecting member 240 is used to connect the positive end face 110 with the terminal component located on one side of the negative end face 120 of the steel shell battery. At the same time, the connecting section 210 of the second conductive connecting member 250 is connected to the negative end face 120, and the leading-out section 230 of the second conductive connecting member 250 is located on one side of the negative end face 120, that is, the second conductive connecting member 250 connects the negative end face 120 with the terminal component located on one side of the negative end face 110 of the steel shell battery.

[0056] In some embodiments, a limiting groove 151 is formed on the battery housing 100, and the insulating section 220 of at least one conductive connecting member is matched with the limiting groove 151.

[0057] In this embodiment, the insulating section 220 of the conductive connection member cooperates with the limiting groove 151, that is, the position of the corresponding conductive connection member can be fixed through the limiting groove 151, preventing the problem of unstable connection with the terminal component caused by the change of the lead-out end position of the conductive connection member. The conductive connection member can be the first conductive connection member 240 and / or the second conductive connection member 250.

[0058] Furthermore, in combination with Figure 5 , the battery housing 100 includes a housing 140 and an end cap 150 fastened to the housing 140, and the limiting groove 151 is formed on the end cap 150.

[0059] In this embodiment, in combination with Figure 4 , since the end cap 150 is fastened outside the housing 140, the diameter of the end cap 150 is larger than that of the housing 140, so that the side wall 130 of the battery housing 100 is uneven. When the conductive connection member closely adheres to and passes through the side wall 130 of the battery housing 100, the conductive connection member also needs to increase the bending section 222 to adapt to the side wall 130 of the battery housing 100, that is, the manufacturing difficulty of the conductive connection member. In this embodiment, in combination with Figure 5 , by forming the limiting groove 151 on the end cap 150 and the conductive connection member passing through the limiting groove 151, it is possible to achieve the fitting of the conductive connection member to the side wall 130 without setting the bending section 222 on the conductive connection member, and at the same time, the position of the conductive connection member can be restricted.

[0060] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0061] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A steel shell battery, characterized in that: The steel shell battery comprises: A battery housing having a positive terminal surface and a negative terminal surface disposed opposite to each other; Conductive connector, the positive terminal face and the negative terminal face are respectively connected to the terminal component through the corresponding conductive connector, the conductive connector comprises a connecting section, an insulating section and a lead section connected in sequence, the positive terminal face and the negative terminal face are respectively connected to the corresponding connecting section of the conductive connector, and the lead section is used to connect to the terminal component; Insulating glue, the outer periphery of each insulating segment is respectively bonded with the insulating glue.

2. The steel shell battery according to claim 1, characterized in that: The conductive connector is a strip-shaped sheet structure, and the insulating glue includes a first glue layer and a second glue layer, the first glue layer and the second glue layer are respectively bonded to the two sides of the strip-shaped sheet structure, the first glue layer and the second glue layer are respectively extended to the outside of the conductive connector along both sides along the width direction, and the part of the first glue layer extending outside the conductive connector is bonded to the part of the second glue layer extending outside the conductive connector.

3. The steel shell battery according to claim 2, characterized in that: The thickness of the first adhesive layer and the second adhesive layer are both 0.02 mm-0.08 mm.

4. The steel shell battery according to claim 1, characterized in that: The lead-out section is located on a side of the battery casing close to the positive terminal surface or on a side of the battery casing close to the negative terminal surface.

5. The steel shell battery according to claim 4, characterized in that: The battery housing has a side wall between the positive terminal surface and the negative terminal surface; The conductive connector comprises a first conductive connector, a connecting section of the first conductive connector is connected to the positive terminal surface, and a lead-out section of the first conductive connector is located at one side of the positive terminal surface; The conductive connector includes a second conductive connector, a connecting section of the second conductive connector is connected to the negative terminal surface, and an insulating section of the second conductive connector passes through and is tightly attached to the outside of the side wall so that the lead section of the second conductive connector is located on one side of the positive terminal surface.

6. The steel shell battery according to claim 5, characterized in that: The insulating section of the first conductive connector includes a noise reduction section, and the noise reduction section is attached to the positive terminal surface.

7. The steel shell battery according to claim 6, characterized in that: The noise reduction section is an arc structure.

8. The steel shell battery according to claim 4, characterized in that: The battery housing has a side wall between the positive terminal surface and the negative terminal surface; The conductive connector includes a first conductive connector, a connecting section of the first conductive connector is connected to the positive terminal surface, and an insulating section of the first conductive connector passes through and is closely attached to the outside of the side wall, so that the lead-out section of the first conductive connector is located on one side of the negative terminal surface; The conductive connector includes a second conductive connector, a connecting section of the second conductive connector is connected to the negative terminal surface, and a lead-out section of the second conductive connector is located at one side of the negative terminal surface.

9. The steel shell battery according to claim 1, characterized in that: The battery housing is provided with a limiting groove, and the insulating section of at least one of the conductive connecting members cooperates with the limiting groove.

10. The steel shell battery according to claim 9, characterized in that: The battery casing comprises a shell and an end cover buckled outside the shell, and the limiting groove is arranged on the end cover.

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