Circuit board assembly for optimizing output area of lithium thionyl chloride battery and battery pack with positive electrode and negative electrode at same end

Abstract

The utility model relates to the technical field of batteries, in particular to a circuit board assembly for optimizing the output area of a lithium thionyl chloride battery with the same positive and negative electrodes at the same end and a battery pack with the same positive and negative electrodes at the same end. The circuit board assembly comprises a circuit board, a positive electrode face and a negative electrode face are integrated on the upper end face of the circuit board, a first opening is formed in the positive electrode face and penetrates through the whole circuit board, via hole electroless plating copper is connected to the first opening, and the via hole electroless plating copper is used for being connected with a positive pole of a battery; the negative electrode surface is arranged around the positive electrode surface; a gap is formed between the positive electrode surface and the negative electrode surface; and a metal bonding pad is integrated on the lower end surface of the circuit board at a position corresponding to the negative electrode surface, is electrically connected with the negative electrode surface and is used for being connected with the negative electrode large surface of the battery. Compared with the prior art, the positive electrode output area of the coin type lithium thionyl chloride battery can be increased, so that the battery can work normally without strictly aligning the positive electrodes, the redundancy of the battery mounting space is increased, and the coin type lithium thionyl chloride battery has great popularization value.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technical field, specifically, it is a kind of circuit board assembly and positive and negative electrode same end battery pack of optimization lithium sub-battery output area. BACKGROUND

[0002] Lithium sub-battery has the advantages of large energy ratio, long one-time use life, environmental protection, etc., is favored by many users, and has wide application in handheld device, animal tracking and positioning, shared bicycle, intelligent water meter, internet of things equipment and other industries.In actual work, lithium sub-battery needs to be realized by area contact Output, the use of different fields is not the same, and the requirements of lithium sub-battery output mode are also different.

[0003] In the prior art, the positive and negative electrode of coin type lithium sub-battery is generally located at the same end of the battery, and the positive electrode pole is usually composed of a rod-shaped structure, and the output area is limited, which causes the battery to be usually required to be strictly aligned with the positive electrode during plug-in replacement to work normally;At the same time, since the positive electrode usually protrudes from the outer surface of the battery, it also causes many inconveniences when packaging and carrying. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of circuit board assembly and positive and negative electrode same end battery pack of optimization lithium sub-battery output area, compared with prior art, the utility model can increase the positive electrode output area of coin type lithium sub-battery, so that battery is more convenient and fast when plug-in replacement, without the positive electrode being strictly aligned to make the battery work normally, increase the redundancy of battery installation space;At the same time, the utility model optimizes the positive electrode pole protruding from the surface of the battery, so that the appearance of the battery is more flat and beautiful, and it is convenient for packaging and carrying.

[0005] The technical scheme of the utility model is as follows: a kind of circuit board assembly of optimization lithium sub-battery output area, comprising:

[0006] Circuit board, the upper end face of the circuit board is integrated with positive face and negative face, the first opening is provided on the positive face and penetrates the whole circuit board, the via hole copper is connected on the first opening, and the via hole copper is used to connect the positive electrode pole of battery;The negative face is arranged around the positive face;There is a gap between the positive face and the negative face;

[0007] The lower end face of the circuit board is integrated with metal pad at the position corresponding to the negative face, the metal pad is electrically connected with the negative face, and is used to connect the negative electrode of battery.

[0008] According to the circuit board assembly of optimization lithium sub-battery output area provided by the utility model, the shape of the circuit board is consistent with the shape and size of the battery plane.

[0009] The utility model provides a kind of circuit board assembly of optimization lithium sub-battery output area, the circuit board is insulating material.

[0010] According to the utility model provides a kind of circuit board assembly of optimization lithium sub-battery output area, the positive pole face, negative pole face is gold-plated material.

[0011] According to the utility model provides a kind of circuit board assembly of optimization lithium sub-battery output area, the plane size of via copper immersion is not more than the plane size of the positive pole face.

[0012] Based on the same concept, the utility model further provides a battery pack with positive and negative electrodes in the same end, comprising:

[0013] Circuit board, the circuit board of any one of the above;

[0014] Lithium sub-battery, the lithium sub-battery is the coin type lithium sub-battery with positive and negative electrodes in the same end;

[0015] Insulating sheet, the through hole is provided on the insulating sheet, and the through hole is used for the positive pole post of lithium sub-battery to pass through the insulating sheet and be connected with the via copper immersion on the circuit board;

[0016] Metal soldering strip, the metal soldering strip is used for electrically connecting the metal soldering pad and the negative pole surface of the lithium sub-battery;

[0017] Sleeve, the sleeve is used for being sleeved on the overall structure after the assembly of the circuit board, lithium sub-battery, insulating sheet and metal soldering strip.

[0018] According to the utility model provides a kind of battery pack with positive and negative electrodes in the same end, the two ends of the metal soldering pad on the circuit board are provided with second opening, the second opening penetrates the circuit board, for the connection of the metal soldering strip and the circuit board.

[0019] According to the utility model provides a kind of battery pack with positive and negative electrodes in the same end, the sleeve is heat shrinkable sleeve.

[0020] According to the utility model provides a kind of battery pack with positive and negative electrodes in the same end, the plane size of the insulating sheet is not more than the plane size of the positive pole face, and the thickness is not more than the height of the positive pole post of lithium sub-battery.

[0021] According to the utility model provides a kind of battery pack with positive and negative electrodes in the same end, the length of the metal soldering strip is greater than the length of the metal soldering pad, the plane size and installation position are not more than the range of the negative pole face, and the thickness is not more than the thickness of the insulating sheet.

[0022] The utility model has the following advantages:

[0023] 1. The utility model discloses a coin type lithium sub-battery positive pole output area can be increased, makes the battery more convenient and fast when plugging and replacing, need not the positive pole strict alignment can make the battery normal work, increased the redundancy of battery installation space, simultaneously, the utility model discloses the positive pole post protruding on the battery surface is optimized, makes the appearance of battery more even and beautiful, is convenient for packing and carrying,

[0024] 2. The shape of the circuit board is consistent with the shape and size of the battery plane, which can ensure that the appearance of the battery pack is flat and beautiful when integrating and assembling the battery pack.

[0025] 3. The circuit board is made of insulating material, which avoids short circuit when the assembly is connected to the battery.

[0026] 4. The positive pole surface and the negative pole surface are made of gold-plated material, and the area of the positive pole surface is larger than that of the positive pole post of the battery, effectively increasing the positive pole contact area of the battery pack. At the same time, the area of the negative pole surface is slightly smaller than that of the negative pole surface of the battery, which does not affect the normal use of the negative pole of the battery pack.

[0027] 5. The plane size of the via copper is not more than the plane size of the positive pole surface, which avoids the short circuit caused by the contact between the large plane of the via copper and the negative pole surface.

[0028] 6. The battery pack is provided with an insulating sheet between the circuit board and the lithium sub-battery, which can effectively avoid the short circuit caused by the tin solder material falling on the negative pole surface when the via copper is welded to the positive pole post.

[0029] 7. The plane size of the insulating sheet is not more than the plane size of the positive pole surface, which avoids the lack of space for installing the metal welding belt due to the large plane of the insulating sheet.

[0030] 8. The plane size and installation position of the metal welding belt are not more than the range of the negative pole surface, which facilitates the sleeve to combine and package the entire battery pack, and ensures the flatness and beauty of the appearance of the battery pack.

[0031] 9. The two ends of the metal pad on the circuit board are provided with a second opening, which facilitates the point welding connection between the metal welding belt and the circuit board, and reduces the processing difficulty of the battery pack.

[0032] 10. The heat shrinkable sleeve has low shrinkage temperature and fast shrinkage speed, and has excellent flame retardant, environmental protection and insulation performance. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical scheme of the utility model, the following will be needed to use the drawings described in the utility model briefly introduced, obviously, the following description of the drawings in the utility model is only some embodiments, for those skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0034] Figure 1 It is the structural schematic diagram of the circuit board assembly of the utility model;

[0035] Figure 2 It is the structural explosion schematic diagram of the battery pack of the utility model;

[0036] Figure 3 It is the structural schematic diagram of the battery pack of the utility model;

[0037] Wherein: 1-circuit board;101-positive pole surface;1011-first opening;102-negative pole surface;1021-second opening;103-via hole copper sinking;104-metal solder pad;2-insulating sheet;201-through hole;3-metal soldering strip;4-sleeve. DETAILED DESCRIPTION

[0038] The embodiments of the utility model are described in detail below, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0039] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the utility model.

[0040] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0041] The utility model relates to a kind of circuit board assembly of optimization lithium sub-battery output area and the battery pack of positive and negative pole same end, compared with prior art, the utility model can increase the positive output area of positive and negative pole same end coin type lithium sub-battery, make battery more convenient and fast when plugging replacement, without the positive pole strict alignment can make battery normal work, increase the redundancy of battery installation space;Meanwhile, the utility model optimizes the positive pole post protruding from the surface of battery, so that the appearance of battery is more flat and beautiful, easy to package and carry.

[0042] The utility model will be further described in detail below with the combination of drawings and specific embodiments.

[0043] A kind of circuit board assembly of optimization lithium sub-battery output area, specifically, as shown in Figure 1 It includes:

[0044] Circuit board 1, the upper end face of circuit board 1 is integrated with positive face 101 and negative face 102, first opening 1011 is equipped on positive face 101, and it is through the entire circuit board 1, via hole copper 103 is connected on first opening 1011, and via hole copper 103 is used to connect the positive pole post of battery;Negative face 102 is arranged around positive face 101;There is gap between positive face 101 and negative face 102;

[0045] The lower end face of circuit board 1 is integrated with metal pad 104 at the position corresponding to negative face 102, metal pad 104 is electrically connected with negative face 102, and is used to connect the negative large surface of battery.

[0046] In actual work, the positive pole post of battery is welded with via hole copper 103 by passing through first opening 1011, so that the positive pole post of battery is electrically connected with the positive face 101 of circuit board assembly, the optimization of battery positive output area is completed, the output of battery positive pole is changed into the positive face 101 of circuit board assembly, and the positive output area of battery is increased;Meanwhile, metal pad 104 is connected with the negative large surface of battery, so that the negative large surface of battery is electrically connected with the negative face 102 of circuit board assembly, and the negative output of battery is changed into the negative face 102 of circuit board assembly;With the combination of two conversion processes, the output end of battery can be changed into circuit board assembly, the positive output area of battery is increased, the problem that the positive pole post of battery protrudes from the surface of battery output end is optimized, and the appearance of battery is more flat and beautiful.

[0047] In some embodiments, as shown in Figure 2 The above-mentioned circuit board 1 is optimized, and the shape of circuit board 1 is consistent with the shape and size of battery plane in the embodiment.

[0048] In actual assembly, if the shape of the circuit board 1 is larger than the shape of the battery plane, the metal pads 104 on the circuit board 1 will be misaligned with the negative electrode large surface of the battery, resulting in unstable electrical connection of the circuit board assembly and the battery, and uneven overall appearance, which is not convenient for carrying; if the shape of the circuit board 1 is smaller than the shape of the battery plane, the positive electrode surface 101 and the negative electrode surface 102 on the circuit board 1 will be correspondingly reduced, and the area of the positive electrode surface 101 is reduced, which is contrary to the original intention of the utility model; the shape of the circuit board 1 is consistent with the shape of the battery plane, which not only ensures the stability of the electrical connection of the circuit board assembly and the battery, but also ensures the overall appearance of the assembled battery to be flat and beautiful.

[0049] Further, in the embodiment, the circuit board 1 is made of insulating material, which avoids the short circuit between the circuit board assembly and the battery caused by the conduction of the circuit board 1.

[0050] In some embodiments, as shown in Figure 1 The positive electrode surface 101 and the negative electrode surface 102 are optimized, and in the embodiment, the positive electrode surface 101 and the negative electrode surface 102 are made of gold-plated material.

[0051] In actual work, the positive electrode surface 101 and the negative electrode surface 102 are made of gold-plated material, which has good conduction effect and low cost, and can also avoid the influence of the thickness of the circuit board assembly on the overall appearance.

[0052] In some embodiments, as shown in Figure 1 The via copper 103 is optimized, and in the embodiment, the plane size of the via copper 103 is not more than the plane size of the positive electrode surface 101.

[0053] In actual work, the plane of the via copper 103 is too large to make the via copper 103 directly contact with the negative electrode surface 102, resulting in short circuit of the circuit board assembly; the essential function of the via copper 103 is to connect the positive electrode surface 101 of the circuit board assembly and the positive electrode pole of the battery, in order to make the connection of the positive electrode surface 101 of the circuit board assembly and the positive electrode pole of the battery more stable, a welding connection method is needed: first, the via copper 103 is connected to the first opening 1011 of the positive electrode surface 101 by soldering, and then the positive electrode pole of the battery is welded together through the first opening 1011 and the via copper 103.

[0054] A battery assembly with positive and negative electrodes on the same end, specifically, as shown in Figure 2 The battery assembly comprises:

[0055] The circuit board 1 is any one of the above-mentioned circuit boards 1;

[0056] The lithium sub-battery is a coin-type lithium sub-battery with positive and negative electrodes on the same end;

[0057] Insulating sheet 2, with through hole 201, through hole 201 for the positive electrode post of lithium-ion battery to pass through insulating sheet 2 and connect to through hole copper plating 103 on circuit board 1;

[0058] Metal welding strip 3 is used to electrically connect metal pad 104 to the negative electrode surface of lithium-ion battery.

[0059] Sleeve 4 is used to be fitted onto the overall structure assembled from circuit board 1, lithium-ion battery, insulating sheet 2 and metal welding strip 3.

[0060] Preferred, such as Figure 1 As shown, in some embodiments, a second opening 1021 is provided at both ends of the metal pad 104 on the circuit board 1, and the second opening 1021 penetrates the circuit board 1.

[0061] Preferably, in some embodiments, the metal welding strip 3 is made of nickel strip;

[0062] Preferably, in some embodiments, the sleeve 4 is a heat-shrinkable sleeve.

[0063] In actual assembly, the insulating sheet 2 is first put on the positive electrode rod of the lithium-ion battery to insulate the positive electrode rod; at the same time, the metal welding strip 3 is assembled with the circuit board 1, including welding the metal welding strip 3 to the metal pad 104. Specifically, the welding method is to spot weld the middle part of the metal welding strip 3 to the metal pad 104.

[0064] Next, the circuit board 1 is assembled with the lithium-ion battery: the positive electrode pin of the lithium-ion battery is passed through the first opening 1011 on the circuit board 1 and connected to the via copper plating 103. In this embodiment, the positive electrode pin and the via copper plating 103 are soldered together with a soldering iron. At the same time, the metal soldering strip 3 is connected to the lithium-ion battery. Specifically, the two ends of the metal soldering strip 3 are soldered to the surface of the lithium-ion battery through the second opening 1021.

[0065] Finally, use sleeve 4 to enclose the entire battery pack and heat it with a hair dryer to make sleeve 4 shrink due to heat, ensuring that the entire battery pack is securely connected together.

[0066] In some embodiments, such as Figure 2 As shown, the insulating sheet 2 described above has been optimized. In this embodiment, the plane size of the insulating sheet 2 does not exceed the plane size of the positive electrode surface 101, and the thickness does not exceed the height of the positive electrode post of the lithium-ion battery.

[0067] In actual work, if the plane of the insulating sheet 2 is too large, the installation position of the metal soldering strip 3 will be invaded, resulting in that the negative surface 102 of the circuit board 1 cannot be effectively connected with the negative large surface of the lithium sub-battery; if the plane of the insulating sheet 2 is too small, tin soldering material may fall into the negative large surface of the lithium sub-battery when the positive pin and the via hole copper 103 are soldered, and then the short circuit of the lithium sub-battery and the circuit board assembly occurs.

[0068] The thickness of the insulating sheet 2 is not more than the height of the positive pole of the lithium sub-battery, which can ensure that the positive pole of the lithium sub-battery is effectively connected with the via hole copper 103.

[0069] In some embodiments, as shown in FIG. 2, the insulating sheet 2 is optimized, and in the embodiment, the length of the metal soldering strip 3 is greater than the length of the metal pad 104, the plane size and the installation position are not more than the range of the negative surface 102, and the thickness is not more than the thickness of the insulating sheet 2. Figure 2

[0070] In actual assembly, the length of the metal soldering strip 3 is greater than the length of the metal pad 104, which can ensure that the metal soldering strip 3 can cover the position of the second opening 1021, and the electric soldering iron can spot weld the two end positions of the metal soldering strip 3 on the surface of the lithium sub-battery through the second opening 1021;

[0071] The plane size and the installation position of the metal soldering strip 3 are not more than the range of the negative surface 102, which can ensure that the metal soldering strip 3 does not invade the connection between the positive pole and the via hole copper 103, and the short circuit of the entire battery pack is avoided.

[0072] The thickness of the metal soldering strip 3 is not more than the thickness of the insulating sheet 2, which can ensure the stability of the connection between the positive pole of the lithium sub-battery and the via hole copper 103.

[0073] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.​

Claims

1. A circuit board assembly that optimizes the output area of a lithium sub- battery, characterized by, The utility model relates to a lithium sub-battery assembly, comprising: a circuit board (1), the upper end surface of the circuit board (1) is integrated with a positive electrode surface (101) and a negative electrode surface (102), a first opening (1011) is arranged on the positive electrode surface (101) and penetrates the whole circuit board (1), a via hole copper (103) is connected to the first opening (1011), and the via hole copper (103) is used for connecting the positive electrode pole of a battery; the negative electrode surface (102) is arranged around the positive electrode surface (101); and a gap exists between the positive electrode surface (101) and the negative electrode surface (102); a metal pad (104) is integrated on the lower end surface of the circuit board (1) corresponding to the position of the negative electrode surface (102), the metal pad (104) is electrically connected with the negative electrode surface (102), and is used for connecting the negative electrode surface of a battery.

2. A circuit board assembly that optimizes the output area of a lithium sub- battery according to claim 1, characterized in that, The shape of the circuit board (1) is consistent with the shape and size of the plane of a battery.

3. The circuit board assembly of claim 1, wherein, The circuit board (1) is made of insulating material.

4. The circuit board assembly of claim 1, wherein, The positive electrode surface (101) and the negative electrode surface (102) are made of gold-plated material.

5. The circuit board assembly of claim 1, wherein, The planar size of the via hole copper (103) is not more than the planar size of the positive electrode surface (101).

6. A battery pack in which the positive and negative electrodes are on the same side, characterized by The utility model relates to a lithium sub-battery assembly, comprising: a circuit board (1), the circuit board (1) is the circuit board (1) as claimed in any one of claims 1-5; a lithium sub-battery, the lithium sub-battery is a coin type lithium sub-battery with the same end of the positive electrode and the negative electrode; an insulating sheet (2), a through hole (201) is arranged on the insulating sheet (2), the through hole (201) is used for the positive electrode pole of the lithium sub-battery to pass through the insulating sheet (2) and be connected with the via hole copper (103) on the circuit board (1); a metal welding belt (3), the metal welding belt (3) is used for electrically connecting the metal pad (104) with the negative electrode surface of the lithium sub-battery; a sleeve (4), the sleeve (4) is used for sleeving the whole structure after the assembly of the circuit board (1), the lithium sub-battery, the insulating sheet (2) and the metal welding belt (3).

7. The battery pack of claim 6, wherein, Second openings (1021) are arranged at both ends of the metal pad (104) on the circuit board (1), and the second openings (1021) penetrate the circuit board (1).

8. The battery pack of claim 6, wherein, The sleeve (4) is a heat shrinkable sleeve.

9. The battery pack of claim 6, wherein, The planar size of the insulating sheet (2) is not more than the planar size of the positive electrode surface (101), and the thickness is not more than the height of the positive electrode pole of the lithium sub-battery.

10. The battery pack of claim 6, wherein, The length of the metal welding belt (3) is greater than the length of the metal pad (104), the planar size and the mounting position are not more than the range of the negative electrode surface (102), and the thickness is not more than the thickness of the insulating sheet (2).

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