Battery and electronic equipment

Abstract

The utility model discloses a battery and an electronic device, the battery comprises a battery cell and a circuit board, the battery cell comprises a main body part and a tab connected with the main body part, the circuit board is parallel to the top surface of the main body part, and the tab is electrically connected with the circuit board. According to the utility model, the battery capacity can be improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery and an electronic device. Background Art

[0002] Mobile phones, laptops and other electronic devices require batteries for power supply. In the prior art, the length of the battery is greatly affected by the width of the circuit board. Under the same volume, the wider the circuit board in the battery, the shorter the battery cell size and the smaller the battery capacity. Utility Model Content

[0003] According to a first aspect of an embodiment of the present application, a battery is provided, comprising a battery cell and a circuit board, wherein the battery cell comprises a main body and a pole ear connected to the main body, the circuit board is parallel to a top surface of the main body, one end of the pole ear is connected to the top surface, and the pole ear is electrically connected to the circuit board.

[0004] Optionally, the tab includes a parallel portion parallel to a top surface of the main body, and the parallel portion is connected to the circuit board.

[0005] Optionally, the battery cell further includes a top seal portion extending from the top surface of the main body, the top seal portion includes a bending portion parallel to the top surface of the main body, one end of the pole ear is connected to the top seal portion, and the other end is electrically connected to the circuit board.

[0006] Optionally, an extending direction of the parallel portion is opposite to an extending direction of the bent portion.

[0007] Optionally, the circuit board is provided with a connecting piece, one connecting side of the connecting piece is connected to the circuit board, and the other connecting side is connected to the tab.

[0008] Optionally, the circuit board is further provided with contacts, and the contacts are located on a side of the circuit board opposite to the tabs.

[0009] Optionally, the circuit board is further provided with at least two groups of contacts, each group of contacts comprising a positive contact and a negative contact.

[0010] Optionally, an injection molding material is filled between the circuit board and the top surface of the main body to form a top cover.

[0011] Optionally, the injection molding material covers the circuit board and exposes contacts of the circuit board.

[0012] Optionally, the main body is further covered with a flexible material, and the flexible material covers at least a portion of the injection molding material.

[0013] Optionally, a bottom cover is formed by injection molding between the bottom surface of the main body and the flexible material, and the bottom surface and the top surface are located at opposite ends of the main body.

[0014] According to a second aspect of an embodiment of the present application, there is provided an electronic device, comprising: a battery as described in any one of the above items.

[0015] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0017] Figure 1 This is an exploded view of the battery in the first embodiment of the present application.

[0018] Figure 2 This is a front view of the battery in the first embodiment of the present application.

[0019] Figure 3 It is a top view of the battery in the first embodiment of the present application.

[0020] Figure 4 for Figure 3 A partial cross-sectional enlarged view of part A in FIG.

[0021] Figure 5 This is a partial cross-sectional enlarged view of the second embodiment of the present application, corresponding to Figure 3 Part A of the

[0022] Figure 6 This is a partial cross-sectional enlarged view of the third embodiment of the present application, corresponding to Figure 3 Part A of the

[0023] Figure 7 This is a partial cross-sectional enlarged view of the fourth embodiment of the present application, corresponding to Figure 3 Part A of the

[0024] Figure 8 This is a partial cross-sectional enlarged view of the fifth embodiment of the present application, corresponding to Figure 3 Part A of the

[0025] Fig. 9 This is a partial cross-sectional enlarged view of the sixth embodiment of the present application, corresponding to Figure 3 Part A of the

[0026] Fig.10 This is a left view of the battery in the first embodiment of the present application.

[0027] Fig.11 This is a schematic diagram of the battery charging principle in the first embodiment of the present application.

[0028] Fig.12 for Figure 3 A partial cross-sectional enlarged view of part B in FIG.

[0029] Fig.13 It is a right side view of the battery in the first embodiment of the present application.

[0030] Fig.14 for Figure 2 A partial enlarged view of part C in FIG.

[0031] Explanation of the reference numerals: 1. battery cell; 101. main body; 102. ear; 103. top surface; 104. parallel portion; 105. top sealing portion; 106. bending portion; 107. bottom surface; 2. circuit board; 201. connecting piece; 202. one connecting side; 203. the other connecting side; 204. contact; 2041. first contact; 2042. second contact; 2043. third contact; 2044. fourth contact; 3. top cover; 4. bottom cover; 5. flexible material; 6. waterproof label; 7. fool-proof structure. DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] like Figures 1 to 4As shown, in the first embodiment of the present application, the battery includes a battery cell 1 and a circuit board 2. The battery cell 1 can be formed by winding a positive electrode sheet, a separator and a negative electrode sheet, and is an energy source, completing the conversion of chemical energy into electrical energy during charging and discharging. The circuit board 2 can be, for example, a PCB board, which integrates protection functions such as overcharge, overdischarge, short circuit, and overcurrent. The length of the battery is L, the width is W, and the thickness is T.

[0038] like Figure 4 As shown, the battery cell 1 in this embodiment includes a main body 101 and a tab 102. The main body 101 is used for converting chemical energy into electrical energy, and the tab 102 is used to connect to an external circuit to achieve charging and discharging. The circuit board 2 is parallel to the top surface 103 of the main body 101, one end of the tab 102 is connected to the top surface 103, and the tab 102 is electrically connected to the circuit board 2. In the present application, "parallel" is not an absolute parallel in a mathematical sense, and there may be an inclination angle within a certain range between the two. For example, the angle between the two surfaces of the circuit board 2 and the top surface 103 is within the manufacturing tolerance range of 3°, 4°, 5°, etc., and the circuit board 2 can be regarded as being parallel to the top surface 103. Compared with the design in the prior art that the circuit board 2 is substantially perpendicular to the top surface 103, the circuit board 2 in the embodiment of the present application is parallel to the top surface 103 of the main body 101, and the battery length L is affected by the thickness T0 of the circuit board 2, and the thickness T0 of the circuit board 2 is much smaller than its width W0. Therefore, under the condition that the battery length L is equal, the main body 101 of the battery in the embodiment of the present application can be longer, that is, under the condition that the dimensions in other directions (battery width W and thickness T) are equal, the embodiment of the present application can set a main body 101 of a larger volume of the battery cell 1 in the battery under the condition of the same battery volume, which is conducive to obtaining a larger battery capacity. Accordingly, under the condition that the battery capacity requirements are equal, the embodiment of the present application is also conducive to realizing battery miniaturization.

[0039] like Figure 5As shown, in the second embodiment of the present application, the pole ear 102 includes a parallel portion 104 parallel to the top surface 103 of the main body 101, and the parallel portion 104 is connected to the circuit board 2. The advantage of this structure is that the parallel portion 104 of the pole ear 102 is connected to the circuit board 2, so that the connection between the pole ear 102 and the circuit board 2 occupies less space in the direction of the battery length L. Therefore, under the condition that the battery length L is equal, the main body 101 of the battery in the second embodiment of the present application can be longer, that is, when the dimensions in other directions (battery width W and thickness T) are equal, the embodiment of the present application can be provided with a main body 101 of a larger volume of the battery cell 1 in the battery under the same battery volume, thereby facilitating the acquisition of a larger battery capacity. Accordingly, under the condition that the battery capacity requirements are equal, the second embodiment of the present application is also conducive to achieving battery miniaturization. At the same time, the parallel portion 104 enables the pole ear 102 to obtain a sufficient connection length with the circuit board 2, and the connection is more reliable.

[0040] like Figure 6 As shown, in the third embodiment of the present application, the battery cell 1 also includes a top seal portion 105 extending from the top surface 103 of the main body 101. One end of the pole ear 102 is connected to the bending portion 106, and the other end is electrically connected to the circuit board 2. The top seal is to prevent battery leakage, oxidation-reduction reaction of positive and negative electrode materials, etc., and the top surface 103 of the battery cell 1 needs to be sealed. The top seal is generally made of materials such as aluminum-plastic composite film, and part of the main body 101 and part of the pole ear 102 of the battery cell 1 are wrapped and sealed with hot melt adhesive. Therefore, after the top seal is completed, a top seal portion 105 extending toward the circuit board 2 (that is, extending along the length L of the battery) will be formed on the top surface 103. The top seal portion 105 seals the top surface 103 but cannot seal the pole ear 102, because the pole ear 102 needs to be partially exposed from the top seal portion 105 to connect with the circuit board 2 to realize the charging and discharging function of the battery.

[0041] like Figure 7 As shown in the fourth embodiment of the present application, the top seal portion 105 includes a bent portion 106 parallel to the top surface 103 of the main body 101. Figure 6 For the third embodiment shown in FIG. Figure 7The fourth embodiment shown bends the top seal 105 instead of extending completely along the direction of the battery length L. The advantage of this structure is that after the top seal 105 is bent to form the bent portion 106, since the bent portion 106 is also parallel to the top surface 103, the bent portion 106 extends in the width W direction of the battery. In other words, the length of the entire top seal 105 is no longer completely extended along the length L direction of the battery, but at least a portion extends along the width W direction of the battery, which further reduces the space occupied by the top seal 105 for the length L of the battery. Therefore, under the condition that the battery length L is equal, the main body 101 of the battery in the fourth embodiment of the present application can be longer, that is, under the condition that the dimensions in other directions (battery width W and thickness T, total length of the top seal 105) are equal, the embodiment of the present application can set a larger volume of the main body 101 of the battery cell 1 in the battery under the same battery volume, which is conducive to obtaining a larger battery capacity. Correspondingly, under the condition that the battery capacity requirements are equal, the fourth embodiment of the present application is also conducive to achieving battery miniaturization.

[0042] like Figure 8 As shown, in the fifth embodiment of the present application, the tab 102 includes a parallel portion 104 parallel to the top surface 103 of the main body 101, and the battery cell 1 also includes a top seal portion 105 extending from the top surface 103 of the main body 101, and the top seal portion 105 includes a bending portion 106 parallel to the top surface 103 of the main body 101. The extending direction of the parallel portion 104 is opposite to the extending direction of the bending portion 106. Specifically, the 1 / 2 width line of the battery (i.e., Figure 8 The dotted line in the figure is used as the boundary, the starting end of the bend portion 106 is located below the 1 / 2 width line of the battery, the bend portion 106 extends upward from below the 1 / 2 width line of the battery and continues to extend for a distance across the 1 / 2 width line of the battery, so that the terminal end of the bend portion 106 is located above the 1 / 2 width line of the battery, and the starting end of the parallel portion 104 is located above the 1 / 2 width line of the battery, and the parallel portion 104 extends downward from above the 1 / 2 width line of the battery and continues to extend for a distance across the 1 / 2 width line of the battery, so that the terminal end of the parallel portion 104 is located below the 1 / 2 width line of the battery. In other words, a shape similar to an "S" is formed between the parallel portion 104 and the bend portion 106. The advantage of this structure is that it can make full use of the thickness W direction of the battery cell 1 (i.e. Figure 8The space between the circuit board 2 and the top surface 103 (in the vertical direction) is used to accommodate the tabs 102 and the top seal 105, so that the length space between the circuit board 2 and the top surface 103 is occupied less by the top seal 105 and the tabs 102. Therefore, under the condition that the battery length L is equal, the main body 101 of the battery in the fifth embodiment of the present application can be longer, that is, under the condition that the dimensions in other directions (battery width W and thickness T, total length of the top seal 105, total length of the tabs 102) are equal, the embodiment of the present application can set a main body 101 of the battery cell 1 with a larger volume in the battery under the condition of the same battery volume, which is conducive to obtaining a larger battery capacity. Correspondingly, under the condition that the battery capacity requirements are equal, the fifth embodiment of the present application is also conducive to achieving battery miniaturization.

[0043] like Fig. 9 As shown, in the sixth embodiment of the present application, the circuit board 2 is provided with a connecting piece 201, one connecting side 202 of the connecting piece 201 is connected to the circuit board 2, and the other connecting side 203 is connected to the pole ear 102. The connecting piece 201 can be a conductive metal sheet such as a nickel sheet, a copper sheet, etc. During assembly, the connecting piece 201 is first set on the circuit board 2, and then the connecting piece 201 is bent to form two connecting sides, one connecting side 202 is connected to the circuit board 2, and the other connecting side 203 is connected to the pole ear 102. In the process of assembling the battery, after the connection is completed through the connecting piece 201, the circuit board 2 can also be pressed against the top sealing part 105 to minimize the occupation of the length space of the battery cell 1, and the assembly is simple. In use, the connecting piece 201 plays the role of electrically connecting the pole ear 102 to the circuit board 2, and one connecting side 202 is connected to the circuit board 2, and the other connecting side 203 is connected to the pole ear 102, so that the connection between the connecting piece 201 and the circuit board 2 and the pole ear 102 can achieve surface connection, and obtain a more reliable connection effect. By utilizing the deformability of the connecting piece 201 itself, one connecting side 202 and the other connecting side 203 can be made to form a right angle before the battery is assembled. In this case, the connecting piece 201 is an L-shaped plate, and the connection between the pole ear 102 and the connecting side 203, such as welding operation, will be more convenient. After the connection is completed, the connecting piece 201 is further bent so that one connecting side 202 is basically parallel to the other connecting side 203, thereby reducing the space occupied by the connecting piece 201 itself.

[0044] like Fig.10 and Fig.11 As shown, optionally, in the first embodiment of the present application, the circuit board 2 is further provided with a contact 204. The contact 204 is located on the side of the circuit board 2 opposite to the tab 102. The contact 204 is connected to the tab 102 through the overcharge, over-discharge, short circuit, overcurrent and other protection circuits on the circuit board 2. The contact 204 is connected to an external circuit to charge and discharge the battery.

[0045] like Fig.11As shown, optionally, in the first embodiment of the present application, the circuit board 2 is provided with at least two groups of contacts 204, each group of contacts 204 includes a positive contact and a negative contact. More specifically, the first contact 2041 and the fourth contact 2044 form a group of contacts, and the second contact 2042 and the third contact 2043 form a group of contacts. The first contact 2041 and the second contact 2042 are positive contacts, and the third contact 2043 and the fourth contact 2044 are negative contacts. During charging, the external power supply applies a first voltage U1 between the second contact 2042 and the third contact 2043, and the current I1 enters the positive electrode of the battery from the second contact 2042, and the external power supply, the second contact 2042 and the third contact 2043 form a first charging circuit; the external power supply applies a second voltage U2 between the first contact 2041 and the fourth contact 2044, and the current I2 enters the battery from the first contact 2041, and the external power supply, the first contact 2041 and the fourth contact 2044 form a second charging circuit. By using at least two groups of contacts 204, two parallel charging circuits can be realized when the battery is charged, thereby improving the charging efficiency. The number of contacts 204 can also be further increased as needed, for example, more than three groups of contacts 204 are provided to further improve the charging efficiency.

[0046] like Figure 1 and Fig. 9 As shown, optionally, in the sixth embodiment of the present application, the circuit board 2 and the top surface 103 of the main body 101 are filled with injection molding material to form a top cover 3, so as to achieve the fixation between the circuit board 2 and the battery cell 1. The thickness T1 of the top cover 3 needs to be designed according to the overall length of the battery to prevent excessive deviation after assembly from causing poor contact.

[0047] like Fig. 9 As shown, optionally, in the sixth embodiment of the present application, the injection molding material covers the circuit board 2 and exposes the contact 204 of the circuit board 2. In other words, after the injection molding is completed, the portion of the circuit board 2 other than the contact 204 is injection molded into a part of the top cover 3, which makes the connection between the circuit board 2 and the battery cell 1 more stable.

[0048] like Figure 1 , Fig. 9 and Fig.12 As shown, the main body 101 is also coated with a flexible material 5. The flexible material 5 at least coats a portion of the injection molding material. The flexible material 5 coats the main body 101, which can prevent the battery from being scratched and broken or damaged during assembly. The flexible material 5 at least coats a portion of the injection molding material, which means that the flexible material 5 also coats at least a portion of the top cover 3, thereby protecting the top cover 3 and the internally injected pole ear 102, the top seal 105, and the circuit structure on the circuit board 2. The flexible material 5 can be, for example, a polyimide film (PI film) or a polyamic acid film (PA film).

[0049] like Figure 1 and Fig.12 , Fig.13 As shown, in one embodiment of the present application, a bottom cover 4 is formed by injection molding between the bottom surface 107 of the main body 101 and the flexible material 5. The bottom cover 4 can protect the main body 101 on the one hand, and can also control the length of the battery on the other hand. In the present application, the bottom surface 107 and the top surface 103 are located at opposite ends of the main body 101.

[0050] like Figure 1 and Fig.10 As shown, optionally, in one embodiment of the present application, a waterproof label 6 is attached to the top cover 3 as a water ingress mark of the battery.

[0051] like Figure 2 and Fig.14 As shown, optionally, in the first embodiment of the present application, an anti-fool structure is designed between the top surface 103 of the battery and the top cover 3 to prevent the battery from being installed in reverse. In other words, the anti-fool structure is consistent with the structure of the battery slot in the electronic device, and the battery can only be loaded into the battery slot when the battery is installed correctly. Exemplarily, the anti-fool structure in the embodiment of the present application can be a step surface set at the fitting edge of the top surface 103 and the top cover 3, that is, part of the top surface 103 is not covered by the top cover 3 to form a step surface, and accordingly, a step is set in the battery slot in the electronic device, and the step can be adapted to the shape of the step surface. In other embodiments of the present application, the anti-fool structure can also be a depression formed between the top surface 103 and the top cover 3, and accordingly, a protrusion is set in the battery slot in the electronic device, and the protrusion can be stuck into the depression.

[0052] The embodiment of the present application further provides an electronic device, comprising: a battery as described in any of the above items. The electronic device may be a mobile phone, a tablet computer, a radio, a portable device, a wearable device, etc. The electronic device has a longer battery life due to the use of the above battery.

[0053] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery, characterized in that: It comprises a battery cell and a circuit board, wherein the battery cell comprises a main body and a tab, the circuit board is parallel to the top surface of the main body, one end of the tab is connected to the top surface, and the tab is electrically connected to the circuit board.

2. The battery according to claim 1, characterized in that The tab includes a parallel portion parallel to the top surface of the main body, and the parallel portion is connected to the circuit board.

3. The battery according to claim 2, characterized in that The battery cell also includes a top sealing portion extending from the top surface of the main body, the top sealing portion includes a bending portion parallel to the top surface of the main body, one end of the pole ear is connected to the bending portion, and the other end is electrically connected to the circuit board.

4. The battery according to claim 3, characterized in that An extending direction of the parallel portion is opposite to an extending direction of the bent portion.

5. The battery according to claim 1, characterized in that The circuit board is provided with a connecting piece, one connecting side of the connecting piece is connected to the circuit board, and the other connecting side of the connecting piece is connected to the tab.

6. The battery according to claim 1, characterized in that The circuit board is also provided with contacts, and the contacts are located on a side of the circuit board opposite to the tabs.

7. The battery according to claim 6, characterized in that The circuit board is provided with at least two groups of contacts, and each group of contacts includes a positive contact and a negative contact.

8. The battery according to any one of claims 3 to 7, characterized in that: An injection molding material is filled between the circuit board and the top surface of the main body to form a top cover.

9. The battery according to claim 8, characterized in that The injection molding material covers the circuit board and exposes the contacts of the circuit board.

10. The battery according to claim 9, characterized in that The main body is also covered with a flexible material, and the flexible material covers at least a portion of the injection molding material.

11. The battery according to claim 10, characterized in that A bottom cover is formed by injection molding between the bottom surface of the main body and the flexible material, and the bottom surface and the top surface are located at opposite ends of the main body.

12. An electronic device, characterized in that: include: A battery as claimed in any one of claims 1 to 11.

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