Rechargeable battery

Abstract

The utility model discloses a rechargeable battery which comprises a lithium battery, the lithium battery comprises a shell, a roll core, a first circuit board, a protective cover and a positive electrode body, the first circuit board is provided with an element side and a polarity side which are oppositely arranged, the shell is provided with a containing groove, the roll core is arranged in the containing groove, the first circuit board is arranged in a groove opening of the containing groove, and the element side faces the roll core; the protective cover is arranged on the element side. The positive electrode body is arranged on the polarity side. The charging shell is provided with a charging port, a second circuit board and a pole. The charging shell fixedly sleeves one end of the lithium battery and serves as a positive electrode end of the lithium battery, an external power supply is inserted into the charging port and is conductively connected with the lithium battery through the second circuit board, the lithium battery can be charged, and the charging shell and the lithium battery serve as a complete rechargeable battery during use; the conventional performance of the lithium battery is reserved, and the problem that a charging port cannot be formed due to insufficient space of the lithium battery is solved; and meanwhile, the first circuit board is arranged inwards, so that the size of the rechargeable battery is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage products, in particular to a rechargeable battery. Background Art

[0002] In order to reduce the cost of using batteries, rechargeable batteries were born. Earlier, they needed to be charged by adding an additional charging station, which was inconvenient. In order to facilitate battery charging, the type-C charging port, which is the same as the mobile phone interface, is a more popular method. Consumers only need to use the mobile phone charging cable to charge the battery. Although this method makes charging more convenient, it requires the battery's own space to set up a charging port, which not only increases the size of the battery, but also makes it difficult to make room for additional charging ports for some batteries with limited space. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a rechargeable battery.

[0004] The utility model discloses a rechargeable battery, comprising:

[0005] A lithium battery, comprising a shell, a winding core, a first circuit board, a protective cover and a positive electrode body, wherein the first circuit board has a component side and a polarity side arranged opposite to each other, the shell has a receiving groove, the winding core is arranged in the receiving groove, the first circuit board is arranged in a notch of the receiving groove, and the component side faces the winding core, the protective cover is arranged on the component side, and the positive electrode body is arranged on the polarity side;

[0006] The negative terminal of the winding core is conductively connected to the polarity side through the shell, and the positive terminal of the winding core is conductively connected to the positive electrode body through the protective cover;

[0007] A charging shell is arranged at the end of the shell, and the charging shell has a charging port, a second circuit board and a pole. The second circuit board is arranged in the charging port, and the pole is located at one end of the charging shell away from the shell; the second circuit board is conductively connected to the positive electrode body and the pole, and the second circuit board is also conductively connected to the shell and / or the polarity side.

[0008] According to one embodiment of the utility model, the charging shell also has a first conductive member and a second conductive member, the first conductive member is respectively connected to the positive electrode body, the second circuit board and the pole, and the second conductive member is respectively connected to the second circuit board and the shell and / or the polarity side.

[0009] According to one embodiment of the utility model, the charging shell also has a receiving groove, the charging port, the second circuit board, the first conductive member and the second conductive member are all arranged in the receiving groove, and one end of the shell is located in the receiving groove.

[0010] According to one embodiment of the present invention, the charging case is made of insulating material.

[0011] According to one embodiment of the utility model, a negative electrode body is provided on the polarity side, the shell is conductively connected to the negative electrode body, and the second circuit board is conductively connected to the shell and / or the negative electrode body.

[0012] According to an embodiment of the present invention, the lithium battery further includes a first sealing body, and the first sealing body is disposed between the protective cover and the wall surface of the containing groove.

[0013] According to an embodiment of the present invention, the lithium battery further includes a protection body, and the protection body is arranged between the protection cover and the component side.

[0014] According to one embodiment of the present invention, the lithium battery further comprises an explosion-proof body, the protective cover is provided with an exhaust hole, and the explosion-proof body is respectively connected to the wall surface of the exhaust hole and the positive terminal of the winding core.

[0015] According to one embodiment of the present invention, the lithium battery further includes a second sealing body, the second sealing body is located between the explosion-proof body and the protective cover, and one end of the explosion-proof body passes through the second sealing body and is connected to the wall of the exhaust hole.

[0016] According to an embodiment of the present invention, a groove is formed inwardly of the shell.

[0017] The beneficial effect of the utility model is that the charging shell is fixedly mounted on one end of the lithium battery and serves as the positive terminal of the lithium battery. The external power supply is inserted into the charging port and conductively connected to the lithium battery through the second circuit board, so that the lithium battery can be charged. When in use, the charging shell and the lithium battery act as a complete rechargeable battery. In this way, not only the conventional performance of the lithium battery is retained, but also the problem of insufficient space for opening a charging port for the lithium battery is solved. At the same time, the inward arrangement of the first circuit board is conducive to reducing the volume of the rechargeable battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of a rechargeable battery;

[0020] Figure 2 is a cross-sectional schematic diagram of a rechargeable battery;

[0021] Figure 3 is another schematic diagram of the three-dimensional structure of a rechargeable battery;

[0022] Figure 4 Schematic diagram of the three-dimensional structure of a lithium battery;

[0023] Figure 5 is a cross-sectional schematic diagram of a lithium battery;

[0024] Figure 6 for Figure 5 A partial enlarged view of .

[0025] Description of Reference Numerals

[0026] 10. lithium battery; 101. housing; 1011. receiving groove; 1012. groove; 102. winding core; 103. first circuit board; 1031. component side; 1032. polarity side; 1033. negative electrode body; 104. protective cover; 1041. exhaust hole; 105. positive electrode body; 106. first sealing body; 107. protective body; 108. explosion-proof body; 109. second sealing body;

[0027] 20. Charging shell; 201. Charging port; 202. Second circuit board; 203. Pole; 204. First conductive member; 205. Second conductive member; 206. Accommodating groove. DETAILED DESCRIPTION

[0028] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0029] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] like Figure 1-Figure 6 As shown, Figure 1 is a schematic diagram of the three-dimensional structure of a rechargeable battery; Figure 2 is a cross-sectional schematic diagram of a rechargeable battery; Figure 3 is another schematic diagram of the three-dimensional structure of a rechargeable battery; Figure 4 Schematic diagram of the three-dimensional structure of a lithium battery; Figure 5 is a cross-sectional schematic diagram of a lithium battery; Figure 6 for Figure 5 The rechargeable battery of the present application includes a lithium battery 10 and a charging shell 20, and the charging shell 20 is arranged at one end of the lithium battery 10. Specifically, the charging shell 20 and the lithium battery 10 are fixedly connected, that is, they are not removable, for example, the two are connected as a whole by glue.

[0031] The lithium battery 10 includes a shell 101, a core 102, a first circuit board 103, a protective cover 104 and a positive electrode body 105. The charging shell 20 is arranged at one end of the shell 101. The core 102 and the electrolyte are both arranged in the shell 101. The first circuit board 103 and the protective cover 104 are also arranged in the shell 101. The protective cover 104 is connected to the first circuit board 103 and the core 102. The first circuit board 103 is protected by the protective cover 104 to prevent the electrolyte from penetrating and contacting the electronic components on the first circuit board 103, and the first circuit board 103 is connected to the core 102 through the protective cover 104. The positive electrode body 105 is located outside the shell 101, the positive electrode body 105 is connected to the first circuit board 103, and the positive electrode body 105 is exposed as the positive electrode of the entire lithium battery 10.

[0032] The shell 101 has a receiving groove 1011, which is opened along the axial direction of the shell 101. The core 102, the first circuit board 103 and the protective cover 104 are all located in the receiving groove 1011, and the electrolyte injected later is also located in the receiving groove 1011. Furthermore, a groove 1012 is opened inwardly on the outer surface of the shell 101. Due to the setting of the groove 1012, the inner wall corresponding to the receiving groove 1011 forms an inner convex structure, which can not only play a role in fixing the core 102, but also serve as a bearing point for the first circuit board 103 and the protective cover 104, that is, the inner convex structure is divided into an upper side and a lower side along the axial direction, the lower side is close to the core 102, and the protective cover 104 is located on the upper side.

[0033] In specific applications, the first circuit board 103 has a component side 1031 and a polarity side 1032, and the component side 1031 and the polarity side 1032 are opposite sides. In this embodiment, the side of the first circuit board 103 facing the winding core 102 is the component side 1031, and the side of the first circuit board 103 away from the winding core 102 is the polarity side 1032. Specifically, the electronic components are integrated on the component side 1031, and the protective cover 104 is arranged on the component side 1031, and the protective cover 104 is arranged on the electronic components to protect the electronic components; in addition, the components of the first circuit board 103 The side 1031 is also integrated with a protection circuit. Compared with the traditional method of connecting the protection circuit to the lithium battery 10 after independent processing, this embodiment can simplify the process and improve efficiency. When used specifically, the first circuit board 103 can adjust the output voltage, for example, output a voltage value of 1.5V, 3.7V or 7.4V. Of course, the circuit supporting the first circuit board 103 in this embodiment is a prior art, and only needs to be increased or decreased according to demand. Similarly, the electronic components are also prior art. Therefore, the specific electronic component distribution and circuit composition of the first circuit board 103 are not elaborated. The positive electrode body 105 is arranged on the polarity side 1032 as the positive output end of the lithium battery 10. Further, the polarity side 1032 is also provided with a negative electrode body 1033, and the shell 101 is connected to the negative electrode body 1033. Specifically, the negative electrode body 1033 is arranged along the contour of the polarity side 1032, and the notch of the receiving groove 1011 on the shell 101 contacts the negative electrode body 1033 through inward folding.

[0034] It can be understood that the positive terminal of the winding core 102 is the positive electrode ear, which is conductively connected to the positive electrode body 105 through the protective cover 104 and the first circuit board 103. At this time, the positive electrode body 105 can be used as the positive output terminal of the lithium battery 10; the negative terminal of the winding core 102 is the negative electrode ear, which is conductively connected to the first circuit board 103 through the shell 101 and the negative electrode body 1033. That is to say, the shell 101 will serve as the negative output terminal of the lithium battery 10, so that the positive and negative electrodes of the lithium battery 10 form a complete circuit.

[0035] Preferably, the lithium battery 10 further includes a first sealing body 106, which is disposed between the protective cover 104 and the inner wall of the receiving groove 1011; in specific applications, the first sealing body 106 is located on the upper side of the groove 1012 of the housing 101, that is, the first sealing body 106 is supported by the upper side of the groove 1012; the protective cover 104 is disposed on the first sealing body 106, supported by the first sealing body 106, and the first sealing body 106 is disposed to not only seal the lithium battery 10 to prevent the electrolyte in the receiving groove 1011 from flowing out, but also block the contact between the protective cover 104 and the first circuit board 103 and the housing 101, thereby achieving an insulating effect. Specifically, the first sealing body 106 is made of a soft insulating material, such as plastic or silicone.

[0036] Furthermore, the lithium battery 10 also includes a protective body 107, which is disposed between the protective cover 104 and the first circuit board 103, and the protective body 107 is conductively connected to the protective cover 104, and the protective body 107 is conductively connected to the first circuit board 103. Specifically, the protective body 107 is a PTC thermistor, and the lithium battery 10 is protected by the provision of the protective body 107. For example, when the temperature is too high, the resistance of the protective body 107 increases, thereby blocking the conduction between the protective cover 104 and the first circuit board 103, that is, blocking the output of the positive terminal of the winding core 102; when the temperature drops, the resistance of the protective body 107 decreases, and the positive terminal of the winding core 102, the protective cover 104, the first circuit board 103 and the positive body 105 can remain in a conductive state.

[0037] Furthermore, the lithium battery 10 further includes an explosion-proof body 108, which is connected to the positive terminal of the winding core 102. At the same time, the protective cover 104 is provided with an exhaust hole 1041, and the internal space of the receiving groove 1011 and the internal space of the protective cover 104 can be communicated through the exhaust hole 1041. The side of the explosion-proof body 108 away from the positive terminal of the winding core 102 is connected to the wall surface of the exhaust hole 1041. It can be understood that due to the connection between the explosion-proof body 108 and the exhaust hole 1041, at this time, the exhaust hole 1041 is blocked, and the electrolyte in the receiving groove 1011 will not flow into the protective cover 104 through the exhaust hole 1041, and will not cause damage to the first circuit board 103. Specifically, the explosion-proof body 108 is a CID explosion-proof valve. When there is excessive gas in the receiving groove 1011, the gas pressure generated will force the explosion-proof body 108 to detach from the exhaust hole 1041. At this time, the internal space of the receiving groove 1011 is connected to the internal space of the protective cover 104. The gas can be discharged to the outside of the lithium battery 10 through the exhaust hole 1041 and the holes on the first circuit board 103 to achieve pressure relief, thereby preventing the lithium battery 10 from exploding due to excessive pressure inside, thereby improving the safety performance of the lithium battery 10.

[0038] Furthermore, the lithium battery 10 further includes a second sealing body 109, which is disposed between the explosion-proof body 108 and the protective cover 104. One side of the explosion-proof body 108 passes through the second sealing body 109 and is located in the exhaust hole 1041. The second sealing body 109 is disposed to not only enhance the connection stability between the explosion-proof body 108 and the protective cover 104, but also to seal the exhaust hole 1041 to prevent the electrolyte from flowing into the exhaust hole 1041. It is understandable that when the air pressure in the receiving tank 1011 exceeds a specified value, the explosion-proof body 108 not only detaches from the exhaust hole 1041, but also partially or completely detaches from the second sealing body 109, and the gas is discharged through the gap formed by the detachment of the explosion-proof body 108.

[0039] It should also be noted that the “conductive connection” referred to above is a connection mode in which electric current can be conducted, such as a connection between metals, which can conduct electric current.

[0040] It can be seen that the electronic components are concentrated on the component side 1031 of the first circuit board 103, and the component side 1031 faces the core 102. The protective cover 104 protects the component side 1031 to prevent the electrolyte from seeping in and damaging the electronic components. The positive end of the core 102 is connected to the first circuit board 103 through the protective cover 104, and then the positive electrode body 105 is used as the positive electrode. The shell 101 is connected to the negative end of the core 102 as the negative electrode; the component side 1031 of the first circuit board 103 is set inward, which can make full use of the space in the accommodating groove 1011, solve the problem of large volume caused by traditional electronic components facing outward, and reduce the volume of the lithium battery 10 to meet the needs of current products.

[0041] The charging shell 20 has a charging port 201, a second circuit board 202 and a pole 203. The charging port 201 is opened at the end of the charging shell 20 or the side of the charging shell 20. The second circuit board 202 is located in the charging port 201. The pole 203 is located at the end of the charging shell 20 away from the lithium battery cell. The second circuit board 202 is conductively connected to the positive electrode 105 and the pole 203. The second circuit board 202 is also in contact with the shell 101 and / or the negative electrode 1033; specifically, after the second circuit board 202 connects the positive electrode 105 with the pole 203, the pole 203 will serve as the positive electrode of the rechargeable battery, and the negative electrode of the second circuit board 202 is connected to the shell or the negative electrode. When in use, the external power supply is inserted into the charging port 201 and connected to the second circuit board 202. At this time, it is in the charging state of the rechargeable battery.

[0042] In this embodiment, the shape of the charging port 201 can be adapted according to the external power source. For example, the shape of the charging port 201 is adapted to the type-C connector, that is, the common type-C connector can be inserted into the charging port 201 and connected to the circuit board for conduction. Of course, it is also possible to select a charging port 201 that is adapted to other connectors, not limited to the type-C connector. Further explanation, the second circuit board 202 uses the product used by the existing charging port, which will not be elaborated here.

[0043] In specific applications, the charging shell 20 also has a first conductive member 204 and a second conductive member 205, the first conductive member 204 connects the second circuit board 202, the positive electrode body 105 and the pole 203, and the second conductive member 205 connects the second circuit board 202 and the shell 101; the first conductive member 204 and the second conductive member 205 realize the conduction between the second circuit board 202 and the positive electrode body 105, the pole 203 and the shell 101. Specifically, the first conductive member 204 and the second conductive member 205 are existing conductive products, such as metal wires or cables. Further, the charging shell 20 also has a receiving groove 206, and the charging port 201 extends into the receiving groove 206, that is, the charging port 201 is located in the receiving groove 206, and at the same time, the second circuit board 202, the first conductive member 204 and the second conductive member 205 are all located in the receiving groove 206; the shell 101 is provided with an end of the positive electrode body 105 located in the receiving groove 206.

[0044] Specifically, the charging shell 20 is made of insulating material, such as plastic material.

[0045] To sum up, the charging shell 20 is fixedly mounted on one end of the lithium battery 10 and serves as the positive terminal of the lithium battery 10. The external power supply is inserted into the charging port 201 and is conductively connected to the lithium battery 10 through the second circuit board 202, so that the lithium battery 10 can be charged. When in use, the charging shell 20 and the lithium battery 10 act as a complete rechargeable battery. In this way, not only the conventional performance of the lithium battery 10 is retained, but also the problem that there is insufficient space for the charging port 201 to be opened in the lithium battery 10 is solved. At the same time, the inward arrangement of the first circuit board is conducive to reducing the volume of the rechargeable battery.

[0046] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A rechargeable battery, characterized in that: include: A lithium battery (10), comprising a housing (101), a winding core (102), a first circuit board (103), a protective cover (104), and a positive electrode body (105); the first circuit board (103) has a component side (1031) and a polarity side (1032) arranged opposite to each other; the housing (101) has a receiving groove (1011); the winding core (102) is arranged in the receiving groove (1011); the first circuit board (103) is arranged at a notch of the receiving groove (1011), and the component side (1031) faces the winding core (102); the protective cover (104) is arranged on the component side (1031); and the positive electrode body (105) is arranged on the polarity side (1032); The negative terminal of the winding core (102) is conductively connected to the polarity side (1032) through the shell (101), and the positive terminal of the winding core (102) is conductively connected to the positive electrode body (105) through the protective cover (104); A charging shell (20) is arranged at an end of the shell (101), the charging shell (20) having a charging port (201), a second circuit board (202) and a pole (203), the second circuit board (202) being arranged in the charging port (201), and the pole (203) being located at an end of the charging shell (20) away from the shell (101); the second circuit board (202) is conductively connected to the positive electrode (105) and the pole (203), and the second circuit board (202) is also conductively connected to the shell (101) and / or the polarity side (1032).

2. The rechargeable battery according to claim 1, characterized in that: The charging shell (20) further comprises a first conductive member (204) and a second conductive member (205), wherein the first conductive member (204) is respectively connected to the positive electrode body (105), the second circuit board (202) and the pole (203), and the second conductive member (205) is respectively connected to the second circuit board (202) and the shell (101) and / or the polarity side (1032).

3. The rechargeable battery according to claim 2, characterized in that: The charging shell (20) further comprises a receiving groove (206), the charging port (201), the second circuit board (202), the first conductive member (204) and the second conductive member (205) are all arranged in the receiving groove (206), and one end of the shell (101) is located in the receiving groove (206).

4. The rechargeable battery according to claim 1, characterized in that: The charging shell (20) is made of insulating material.

5. The rechargeable battery according to any one of claims 1 to 4, characterized in that: The polarity side (1032) is provided with a negative electrode body (1033), the housing (101) is conductively connected to the negative electrode body (1033), and the second circuit board (202) is conductively connected to the housing (101) and / or the negative electrode body (1033).

6. The rechargeable battery according to any one of claims 1 to 4, characterized in that: The lithium battery (10) further comprises a first sealing body (106), wherein the first sealing body (106) is arranged between the protection cover (104) and the wall surface of the containing groove (1011).

7. The rechargeable battery according to any one of claims 1 to 4, characterized in that: The lithium battery (10) further comprises a protection body (107), wherein the protection body (107) is arranged between the protection cover (104) and the element side (1031).

8. The rechargeable battery according to any one of claims 1 to 4, characterized in that: The lithium battery (10) further comprises an explosion-proof body (108), the protective cover (104) is provided with an exhaust hole (1041), and the explosion-proof body (108) is respectively connected to the wall surface of the exhaust hole (1041) and the positive terminal of the winding core (102).

9. The rechargeable battery according to claim 8, characterized in that: The lithium battery (10) further comprises a second sealing body (109), the second sealing body (109) being located between the explosion-proof body (108) and the protective cover (104), and one end of the explosion-proof body (108) passing through the second sealing body (109) and connected to the wall surface of the exhaust hole (1041).

10. The rechargeable battery according to any one of claims 1 to 4, characterized in that: The housing (101) is provided with a groove (1012) facing inwards.

Images