Rechargeable battery

Abstract

Disclosed in the present application is a rechargeable battery, comprising: a lithium battery, which comprises a casing, a jelly roll, a first circuit board, a protective cover and a positive electrode body, the first circuit board having an element side and a polarity side which are arranged opposite to each other, the casing having an accommodation recess, and the element side facing the jelly roll; and a charging sleeve, which comprises a sleeve body, the sleeve body being provided with a mounting recess, a charging port and a second circuit board. When the lithium battery needs to be charged, one end of the lithium battery is clamped into the mounting recess, such that a positive electrode member is connected to the positive electrode body of the lithium battery, a negative electrode member is connected to the casing of the lithium battery, and an external power supply is plugged to the charging port so as to charge the lithium battery by means of the cooperation of the second circuit board, the positive electrode member, the negative electrode member, the positive electrode body and the first circuit board; and after the charging is completed, the lithium battery can be taken out from the mounting recess. Thus, the present application satisfies the charging demand of lithium batteries without increasing the size of lithium batteries, thus solving the problem that lithium batteries cannot be provided with charging ports due to insufficient space, and being applicable to most lithium batteries.

Description

rechargeable batteries Technical Field

[0001] This application relates to the field of energy storage product technology, and more specifically, to a rechargeable battery. Background Technology

[0002] To reduce the cost of using point batteries, rechargeable batteries were developed. Early rechargeable batteries required an additional charging dock, which was inconvenient. To facilitate charging, the Type-C charging port, the same as that used in mobile phones, is now the more popular method. Consumers can simply use a phone charging cable to charge the battery. While this method makes charging more convenient, it requires space within the battery itself to accommodate the charging port, increasing the battery's size. Furthermore, for batteries with limited space, it may be difficult to find room for such a port.

[0003] Application content

[0004] In view of the shortcomings of the prior art, this application provides a rechargeable battery.

[0005] This application discloses a rechargeable battery, comprising:

[0006] A lithium battery includes a casing, a winding core, a first circuit board, a protective cover, and a positive electrode. The first circuit board has an element side and a polarity side that are disposed opposite to each other. The casing has a receiving groove. The winding core is disposed in the receiving groove. The first circuit board is disposed at the opening of the receiving groove with the element side facing the winding core. The protective cover is disposed on the element side, and the positive electrode is disposed on the polarity side.

[0007] The negative terminal of the core is electrically connected to the polarity side through the shell, and the positive terminal of the core is electrically connected to the positive electrode through the protective cover.

[0008] A charging case includes a case body, the case body having a mounting groove, a charging port and a second circuit board, the second circuit board being disposed inside the charging port, the second circuit board having a positive electrode and a negative electrode, both of which extend into the mounting groove.

[0009] Charging status: The housing is detachably installed in the mounting slot, the positive electrode is in contact with the positive electrode and is conductive, the housing is in contact with the negative electrode and is conductive, and the external power supply charges the lithium battery through the second circuit board.

[0010] According to one embodiment of this application, the lithium battery further includes a first sealing body disposed between the protective cover and the wall of the receiving groove.

[0011] According to one embodiment of this application, the lithium battery further includes a protective body disposed between the protective cover and the component side.

[0012] According to an embodiment of the present application, the lithium battery further comprises an explosion-proof body, the protective cover is provided with an exhaust hole, and the explosion-proof body is connected to the wall surface of the exhaust hole and the positive electrode end of the winding core.

[0013] According to an embodiment of the present application, the lithium battery further comprises a second sealing body, the second sealing body is located between the explosion-proof body and the protective cover, one end of the explosion-proof body penetrates through the second sealing body and is connected to the wall surface of the exhaust hole.

[0014] According to an embodiment of the present application, the sleeve body is further provided with a plurality of positive electrode channels and negative electrode channels, the positive electrode channels and the negative electrode channels are both connected to the installation groove and the charging port, the positive electrode piece is located in the positive electrode channel, and the negative electrode piece is located in the negative electrode channel.

[0015] According to an embodiment of the present application, the sleeve body is further provided with a clamping groove, the clamping groove is connected to the installation groove, and the positive electrode piece extends to the clamping groove or the installation groove.

[0016] According to an embodiment of the present application, the clamping groove is provided with a clamping inclined surface at one end close to the installation groove.

[0017] According to an embodiment of the present application, the sleeve body is further provided with a magnetic piece, the magnetic piece is clamped in the clamping groove, and the positive electrode piece is in conductive connection with the magnetic piece.

[0018] According to an embodiment of the present application, the inner wall surface of the installation groove is provided with a buffer piece.

[0019] The present application has the beneficial effects that when the lithium battery needs to be charged, one end of the lithium battery is clamped into the installation groove, the positive electrode piece is connected to the positive electrode body of the lithium battery, the negative electrode piece is connected to the shell of the lithium battery, an external power supply is inserted into the charging port, and the charging of the lithium battery is realized through the cooperation of the second circuit board, the positive electrode piece, the negative electrode piece, the positive electrode body and the first circuit board; after the charging is completed, the lithium battery can be taken out from the installation groove. In this way, the charging demand of the lithium battery is met, the volume of the lithium battery is not increased, the problem that the lithium battery cannot be provided with a charging port due to insufficient space is solved, and the present application is suitable for most lithium batteries. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, and are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] FIG. 1 is a schematic view of a charging battery in a perspective structure;

[0022] FIG. 2 is a schematic view of the charging battery in a split state;

[0023] FIG. 3 is a schematic view of the charging battery in a cross-sectional structure;

[0024] FIG. 4 is a schematic view of a lithium battery in a perspective structure;

[0025] Fig. 5 is a sectional view of a lithium battery;

[0026] Fig. 6 is an enlarged view of a portion of Fig. 5;

[0027] Fig. 7 is a perspective view of a charging sleeve;

[0028] Fig. 8 is another perspective view of the charging sleeve;

[0029] Fig. 9 is a sectional view of the charging sleeve;

[0030] Fig. 10 is a partial view of the inside of the charging sleeve.

[0031] Explanation of Reference Numerals

[0032] 10, lithium battery; 101, housing; 1011, receiving groove; 1012, recess; 102, roll 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;

[0033] 20, charging sleeve; 201, sleeve body; 2011, mounting groove; 20111, buffer member; 2012, charging port; 2013, second circuit board; 20131, positive electrode member; 20132, negative electrode member; 2014, positive electrode passage; 2015, negative electrode passage; 2016, clamping groove; 20161, clamping inclined surface; 2017, magnetic member. DETAILED DESCRIPTION

[0034] Embodiments of the present application will be described below with reference to the drawings. Many practical details are described in the following description to provide a thorough understanding of the application. However, it will be apparent to those skilled in the art that the application can be practiced without these specific details. In other instances, well-known structures and components are shown in block diagram form in order to avoid obscuring the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0035] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and does not mean to indicate or imply the order or sequence, nor to limit the present application, which is merely to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0036] As shown in Figures 1-3, Figure 1 is a schematic diagram of the structure of the charging battery; Figure 2 is a diagram of the charging battery in a split state; Figure 3 is a schematic diagram of the cross-section of the charging battery. The charging battery of the present application comprises a lithium battery 10 and a charging sleeve 20, the lithium battery 10 and the charging sleeve 20 are detachably connected; specifically: when charging, one end of the lithium battery 10 is clamped in the charging sleeve 20, and the lithium battery 10 and the charging sleeve 20 are conductively connected, an external power supply is connected with the charging sleeve 20, to realize charging of the lithium battery 10; after charging is completed, the lithium battery 10 is separated from the charging sleeve 20, and the lithium battery 10 can be used alone.

[0037] Referring also to Figures 4-6, Figure 4 is a schematic diagram of the structure of the lithium battery 10; Figure 5 is a schematic diagram of the cross-section of the lithium battery 10; Figure 6 is a local enlarged view of Figure 5. The lithium battery 10 of the present application comprises a shell 101, a winding core 102, a first circuit board 103, a protective cover 104 and a positive electrode body 105, the winding core 102 and the electrolyte are 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 with the first circuit board 103 and the winding core 102, the first circuit board 103 is protected by the protective cover 104, to prevent the electrolyte from seeping in and contacting the electronic components on the first circuit board 103, and the first circuit board 103 is connected with the winding 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 with the first circuit board 103, and the positive electrode body 105 is exposed as the positive electrode of the entire lithium battery 10.

[0038] The shell 101 has a containing groove 1011 which is axially opened along the shell 101, the roll core 102, the first circuit board 103 and the protective cover 104 are all located in the containing groove 1011, and the electrolyte injected later is also located in the containing groove 1011. Further, the outer surface of the shell 101 is inwardly provided with a groove 1012, due to the arrangement of the groove 1012, the inner wall corresponding to the containing groove 1011 forms an inner convex structure, which can not only play a role in fixing the roll core 102, but also serve as a bearing point of 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 roll core 102, and the protective cover 104 is located on the upper side.

[0039] In specific application, the first circuit board 103 has an element side 1031 and a polarity side 1032, the element side 1031 and the polarity side 1032 are opposite sides, in the embodiment, the side of the first circuit board 103 facing the roll core 102 is the element side 1031, and the side of the first circuit board 103 away from the roll core 102 is the polarity side 1032, specifically, electronic components are integrated on the element side 1031, the protective cover 104 is arranged on the element side 1031, and the protective cover 104 covers the electronic components to protect the electronic components; in addition, the element side 1031 of the first circuit board 103 is also integrated with a protection circuit, compared with the traditional way of connecting the protection circuit with the lithium battery 10 after independent processing of the protection circuit, the embodiment can simplify the process and improve the efficiency; in specific use, 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 matched with the first circuit board 103 in the embodiment is prior art, and only needs to be increased or decreased according to the demand, and the electronic components are also prior art, therefore, the specific distribution of electronic components and the composition of the circuit of the first circuit board 103 will not be described. The positive body 105 is arranged on the polarity side 1032 as a positive output end of the lithium battery 10. Further, the polarity side 1032 is also provided with a negative body 1033, the shell 101 is connected with the negative body 1033, specifically, the negative body 1033 is arranged along the contour of the polarity side 1032, and the slot opening of the containing groove 1011 on the shell 101 is in contact with the negative body 1033 through inward folding.

[0040] It can be understood that the positive end of the roll core 102 is a positive tab which is conductively connected with the positive body 105 through the protective cover 104 and the first circuit board 103, at this time, the positive body 105 can serve as the positive output end of the lithium battery 10; the negative end of the roll core 102 is a negative tab which is conductively connected with the first circuit board 103 through the shell 101 and the negative body 1033, that is, the shell 101 serves as the negative output end of the lithium battery 10, so that the positive and negative poles of the lithium battery 10 form a complete loop.

[0041] Preferably, the lithium battery 10 further comprises a first sealing body 106, which is arranged between the protective cover 104 and the inner wall of the accommodating groove 1011. In a specific application, the first sealing body 106 is located on the upper side of the groove 1012 of the shell 101, i.e., the first sealing body 106 is supported by the upper side of the groove 1012. The protective cover 104 is arranged on the first sealing body 106 and supported by the first sealing body 106. Through the arrangement of the first sealing body 106, the lithium battery 10 is not only sealed to prevent the electrolyte in the accommodating groove 1011 from flowing out, but also insulated from the contact between the protective cover 104, the first circuit board 103 and the shell 101. Specifically, the first sealing body 106 is made of a soft insulating material, such as plastic or silicone.

[0042] Further, the lithium battery 10 further comprises a protective body 107, which is arranged between the protective cover 104 and the first circuit board 103. The protective body 107 is in conductive connection with the protective cover 104 and the first circuit board 103. Specifically, the protective body 107 is a PTC thermistor. Through the arrangement of the protective body 107, the lithium battery 10 is protected. 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, i.e., blocking the output of the positive terminal of the winding core 102. After the temperature decreases, 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 maintain a conductive state.

[0043] Further, the lithium battery 10 further comprises an explosion-proof body 108, which is connected to the positive terminal of the winding core 102. Meanwhile, the protective cover 104 is provided with an exhaust hole 1041, and the internal space of the accommodating groove 1011 and the internal space of the protective cover 104 can communicate 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 accommodating 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 excess gas in the accommodating groove 1011, the gas pressure generated thereby will force the explosion-proof body 108 to separate from the exhaust hole 1041. At this time, the internal space of the accommodating groove 1011 and the internal space of the protective cover 104 are communicated, and 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, thereby achieving pressure relief and preventing the lithium battery 10 from exploding due to excessive pressure, thereby improving the safety performance of the lithium battery 10.

[0044] Further, the lithium battery 10 further comprises a second sealing body 109, which is arranged between the explosion-proof body 108 and the protective cover 104, one side of the explosion-proof body 108 penetrates through the second sealing body 109 and is located in the exhaust hole 1041. Through the arrangement of the second sealing body 109, not only the connection stability of the explosion-proof body 108 and the protective cover 104 is enhanced, but also the exhaust hole 1041 can be sealed to prevent the electrolyte from flowing into the exhaust hole 1041. It can be understood that when the air pressure in the accommodating groove 1011 exceeds the limited value, the explosion-proof body 108 not only separates from the exhaust hole 1041, but also partially or completely separates from the second sealing body 109, and the gas is discharged through the gap formed by the separation of the explosion-proof body 108.

[0045] It should be further pointed out that the "conductive connection" referred to above is a connection mode in which current can be conducted, for example, the connection between metal and metal, which can conduct current.

[0046] It can be seen that the electronic components are concentrated on the element side 1031 of the first circuit board 103, the element side 1031 faces the winding core 102, the protective cover 104 protects the element side 1031 to prevent the electrolyte from seeping into and damaging the electronic components, the positive terminal of the winding core 102 is connected to the first circuit board 103 through the protective cover 104, and then the positive body 105 is used as a positive electrode for output, and the shell 101 is connected to the negative terminal of the winding core 102 as a negative electrode. By arranging the element side 1031 of the first circuit board 103 inward, the space in the accommodating groove 1011 can be fully utilized, the problem of large volume caused by the outward arrangement of the traditional electronic components is solved, and the volume of the lithium battery 10 is reduced, which is conducive to meeting the current product demand.

[0047] Further referring to FIGS. 7-10, FIG. 7 is a perspective structural schematic diagram of the charging sleeve 20; FIG. 8 is another perspective structural schematic diagram of the charging sleeve 20; FIG. 9 is a sectional schematic diagram of the charging sleeve 20; and FIG. 10 is a partial schematic diagram of the inside of the charging sleeve 20. The charging sleeve 20 of the present application comprises a sleeve body 201, which is sleeved on one end of the lithium battery 10 and is charged by an external power source.

[0048] The sleeve body 201 has a mounting groove 2011, a charging port 2012 and a second circuit board 2013. One end of the positive electrode body 105 of the lithium battery 10 is clamped in the mounting groove 2011, the second circuit board 2013 is arranged in the charging port 2012, and the second circuit board 2013 is in conduction with the lithium battery 10 in the mounting groove 2011. In specific application, the sleeve body 201 is in a cylindrical shape, and the mounting groove 2011 is axially arranged on the sleeve body 201. The charging port 2012 is located at one end of the sleeve body 201 away from the mounting groove 2011, or the charging port 2012 is arranged on the outer surface of the sleeve body 201. Further, the lithium battery 10 is detachably connected with the mounting groove 2011. When the lithium battery 10 needs to be charged, the lithium battery 10 is inserted into the mounting groove 2011 of the sleeve body 201. After the lithium battery 10 is fully charged, the lithium battery 10 is taken out of the mounting groove 2011.

[0049] Preferably, a buffer 20111 is further arranged in the mounting groove 2011. The buffer 20111 is arranged along the inner wall of the mounting groove 2011. When the lithium battery 10 is inserted into the mounting groove 2011, the buffer 20111 is located between the inner wall of the mounting groove 2011 and the outer surface of the shell 101 of the lithium battery 10. The buffer 20111 protects the outer surface of the shell 101 from being abraded by the inner wall of the mounting groove 2011. Specifically, the buffer 20111 is made of soft material, such as plastic or silica gel.

[0050] The shape of the charging port 2012 in the embodiment can be adapted to the external power supply. For example, the shape of the charging port 2012 is adapted to the type-C connector, that is, the common type-C connector can be inserted into the charging port 2012 and connected with the second circuit board 2013 to conduct electricity. Of course, the charging port 2012 adapted to other connectors can also be selected, and is not limited to the type-C connector.

[0051] The second circuit board 2013 has a positive piece 20131 and a negative piece 20132, one end of the positive piece 20131 is connected with the second circuit board 2013, and the other end extends into the mounting groove 2011; one end of the negative piece 20132 is connected with the second circuit board 2013, and the other end extends into the mounting groove 2011; when the lithium battery 10 is clamped in, the positive piece 20131 is in conductive connection with the positive body 105 of the lithium battery 10, and the negative piece 20132 is in conductive connection with the shell 101 or the negative body 1033 of the lithium battery 10, so that the second circuit board 2013 is in conduction with the lithium battery 10. Specifically, the positive piece 20131 and the negative piece 20132 are both wire materials with conductive ability, for example, cables, or directly using copper wires or other metal wires. Further, the charging sleeve 20 also has a positive channel 2014, the positive channel 2014 respectively communicates the charging port 2012 and the mounting groove 2011, and the positive piece 20131 is located in the positive channel 2014. Through the arrangement of the positive channel 2014, the positive piece 20131 can be quickly extended into the mounting groove 2011, and the positive piece 20131 is also protected. Similarly, the charging sleeve 20 also has a negative channel 2015, the negative channel 2015 is distributed in the positive channel 2014, and the negative channel 2015 respectively communicates the charging port 2012 and the mounting groove 2011. The negative piece 20132 is located in the negative channel 2015.

[0052] Further, the charging sleeve 20 also has a clamping groove 2016, the clamping groove 2016 communicates with the mounting groove 2011, when the lithium battery 10 is clamped into the mounting groove 2011, the positive body 105 of the lithium battery 10 is clamped into the clamping groove 2016, so as to improve the stability of the connection between the sleeve body 201 and the lithium battery 10. In specific application, the clamping groove 2016 communicates with the positive channel 2014, that is, one end of the positive piece 20131 extends into the mounting groove 2011 after passing through the positive channel 2014 and the clamping groove 2016. Preferably, the outer surface of one end of the clamping groove 2016 close to the mounting groove 2011 is provided with a clamping inclined surface 20161, the cross section of the clamping inclined surface 20161 is in inverted "eight" shape, or can be understood as in trumpet shape, wherein the caliber of the clamping inclined surface 20161 gradually decreases along the direction close to the mounting groove 2011, so as to improve the clamping effect of the clamping groove 2016 on the positive body 105 of the lithium battery 10.

[0053] In another embodiment, the charging sleeve 20 further has a magnetic piece 2017 located in the clamping groove 2016, and the positive piece 20131 is connected with the magnetic piece 2017 and is in conduction, when the positive body 105 of the lithium battery 10 is inserted into the clamping groove 2016, the magnetic piece 2017 is adsorbed and connected with the positive body 105 of the lithium battery 10, through the setting of the magnetic piece 2017, not only makes the positive piece 20131 quickly connected with the positive body 105 of the lithium battery 10, but also reduces the risk of the positive piece 20131 not in contact with the positive body 105 of the lithium battery 10. Specifically, the magnetic piece 2017 is a magnet.

[0054] When the lithium battery 10 needs to be charged, one end of the lithium battery 10 is inserted into the mounting groove 2011, at the same time, the positive body 105 of the one end is clamped into the clamping groove 2016, the magnetic piece 2017 is adsorbed on the positive body 105 of the lithium battery 10, and the negative piece 20132 is in contact and conduction with the shell 101 or the negative body 1033 of the lithium battery 10, then the external power supply is inserted into the charging port 2012 and connected with the second circuit board 2013, at this time, the lithium battery 10 can be charged. After the charging is completed, the sleeve body 201 is pulled out from one end of the lithium battery 10.

[0055] Further, the second circuit board 2013 is selected from the existing products used in the charging port, which is not described here.

[0056] In summary, when the lithium battery 10 needs to be charged, one end of the lithium battery 10 is clamped into the mounting groove 2011, the positive piece 20131 is connected with the positive body 105 of the lithium battery 10, the negative piece 20132 is connected with the shell 101 of the lithium battery 10, the external power supply is inserted into the charging port 2012, and the charging of the lithium battery 10 is realized through the cooperation of the second circuit board 2013, the positive piece 20131, the negative piece 20132, the positive body 105 and the first circuit board 106; after the charging is completed, the lithium battery 10 is taken out from the mounting groove 2011. In this way, the charging demand of the lithium battery 10 is met, and the size of the lithium battery 10 is not increased, the problem that the lithium battery 10 cannot be provided with a charging port 2012 due to insufficient space is solved, and it is suitable for most lithium batteries 10.

[0057] The above only describes the embodiments of the present application and is not used to limit the present application. The present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A rechargeable battery, characterized by The lithium battery (10) comprises a shell (101), a roll core (102), a first circuit board (103), a protective cover (104) and a positive electrode body (105), the first circuit board (103) has an element side (1031) and a polarity side (1032) arranged oppositely, the shell (101) has a receiving groove (1011), the roll core (102) is arranged in the receiving groove (1011), the first circuit board (103) is arranged at the opening of the receiving groove (1011), and the element side (1031) faces the roll core (102), the protective cover (104) is arranged on the element side (1031), and the positive electrode body (105) is arranged on the polarity side (1032). The negative electrode end of the roll core (102) is electrically connected to the polarity side (1032) through the shell (101), and the positive electrode end of the roll core (102) is electrically connected to the positive electrode body (105) through the protective cover (104). The charging sleeve (20) comprises a sleeve body (201), the sleeve body (201) has a mounting groove (2011), a charging port (2012) and a second circuit board (2013), the second circuit board (2013) is arranged in the charging port (2012), the second circuit board (2013) has a positive electrode piece (20131) and a negative electrode piece (20132), and the positive electrode piece (20131) and the negative electrode piece (20132) extend into the mounting groove (2011). In the charging state, the shell (101) is detachably arranged in the mounting groove (2011), the positive electrode body (105) is in contact with and conducts with the positive electrode piece (20131), the shell (101) is in contact with and conducts with the negative electrode piece (20132), and an external power supply charges the lithium battery (10) through the second circuit board (2013). The lithium battery (10) further comprises a first sealing body (106), the first sealing body (106) is arranged between the protective cover (104) and the wall surface of the receiving groove (1011).

2. The rechargeable battery of claim 1, wherein The lithium battery (10) further comprises a protective body (107), the protective body (107) is arranged between the protective cover (104) and the element side (1031).

3. The rechargeable battery of claim 1, wherein 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 connected to the wall surface of the exhaust hole (1041) and the positive electrode end of the roll core (102) respectively.

4. The rechargeable battery of claim 1, wherein The lithium battery (10) further comprises a second sealing body (109), the second sealing body (109) is located between the explosion-proof body (108) and the protective cover (104), one end of the explosion-proof body (108) penetrates through the second sealing body (109) and is connected to the wall surface of the exhaust hole (1041).

5. The rechargeable battery of claim 4, wherein ​ 6. The rechargeable battery of any one of claims 1-5, wherein, The sleeve body (201) further has positive electrode channels (2014) and negative electrode channels (2015) which are spaced apart and communicate with the mounting groove (2011) and the charging port (2012), the positive electrode member (20131) is located in the positive electrode channel (2014), and the negative electrode member (20132) is located in the negative electrode channel (2015).

7. The rechargeable battery of any of claims 1-5, wherein The sleeve body (201) further has a clamping groove (2016) which communicates with the mounting groove (2011), and the positive electrode member (20131) extends to the clamping groove (2016) or the mounting groove (2011).

8. The rechargeable battery of claim 7, wherein The clamping groove (2016) is provided with a clamping inclined surface (20161) near one end of the mounting groove (2011).

9. The rechargeable battery of claim 7, wherein The sleeve body (201) further has a magnetic member (2017) which is clamped in the clamping groove (2016), and the positive electrode member (20131) is in conductive connection with the magnetic member (2017).

10. The rechargeable battery of any one of claims 1-5, wherein The inner wall surface of the mounting groove (2011) is provided with a buffer member (20111).

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