Cylindrical lithium battery structure

Abstract

The cylindrical lithium battery structure comprises a battery pack, a plurality of first electrode connecting sheets and a second electrode connecting sheet, the battery pack comprises a plurality of cylindrical lithium batteries which are arranged in parallel, the plurality of first electrode connecting sheets comprise first sheet bodies and first lead-out sheets connected with the first sheet bodies, and the second electrode connecting sheets comprise second sheet bodies and second lead-out sheets connected with the second sheet bodies. The plurality of first sheet bodies are connected with electrodes at one ends of the plurality of cylindrical lithium batteries, the first lead-out sheet is provided with a through hole, the second electrode connecting sheet comprises a second sheet body and a second lead-out sheet connected with the second sheet body, the second sheet body is connected with electrodes at the other ends of the plurality of cylindrical lithium batteries, and the second lead-out sheet is provided with a through hole. And the second lead-out sheet is bent around the battery pack and extends to one end, provided with the first electrode connecting sheet, of the battery pack. Therefore, the cylindrical lithium battery structure provided by the embodiment of the utility model has the characteristic of high safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lithium battery, in particular to a cylindrical lithium battery structure. BACKGROUND

[0002] In the related art, when the cylindrical lithium battery has abnormal overload and external short circuit problems during use, the electrode of the cylindrical lithium battery cannot be disconnected in time, which easily causes the problems of battery overheating and fire, and the safety is low. SUMMARY

[0003] The cylindrical lithium battery structure provided by the embodiments of the present application solves the problem of low safety of the cylindrical lithium battery in the related art, and achieves the effect of improving the safety of the cylindrical lithium battery.

[0004] The cylindrical lithium battery structure provided by the embodiments of the present application comprises:

[0005] The battery pack comprises a plurality of cylindrical lithium batteries arranged side by side.

[0006] The first electrode connecting piece comprises a first sheet body and a first lead-out sheet connected to the first sheet body, a plurality of first sheet bodies are respectively connected to the electrodes at one end of a plurality of cylindrical lithium batteries, and a through hole is arranged on the first lead-out sheet.

[0007] The second electrode connecting piece comprises a second sheet body and a second lead-out sheet connected to the second sheet body, the second sheet body is connected to the electrodes at the other end of a plurality of cylindrical lithium batteries, and the second lead-out sheet is bent and extended to one end of the battery pack provided with the first electrode connecting piece.

[0008] The cylindrical lithium battery structure provided by the embodiments of the present application sets a through hole on the first lead-out sheet of the first electrode connecting piece to timely fuse and cut off the output loop when the first lead-out sheet passes through an abnormally large current, thereby avoiding further escalation of abnormal problems and greatly improving the safety of the cylindrical lithium battery structure provided by the embodiments of the present application. At the same time, the second lead-out sheet of the second electrode connecting piece is bent and extended to one end of the battery pack provided with the first electrode connecting piece, i.e. the positive and negative electrode sheets of the battery pack are arranged at the same end, so that the positive and negative electrodes of the battery pack can be output from the same end of the battery pack, thereby greatly improving the space utilization of the cylindrical lithium battery structure provided by the embodiments of the present application.

[0009] Therefore, the cylindrical lithium battery structure provided by the embodiments of the present application has the characteristics of high safety and high space utilization.

[0010] In some embodiments, the first lead-out sheet comprises a first flat section, a first vertical section and a second flat section connected in sequence, and the first flat section is provided with a through hole.

[0011] In some embodiments, the cylindrical lithium battery structure further comprises a temperature detection assembly, the temperature detection assembly comprises a temperature sensor and a lead wire, the temperature sensor is arranged between the two cylindrical lithium batteries, one end of the lead wire is connected with the temperature sensor, and the other end of the lead wire is bent and extended to one end of the battery pack through the battery pack.

[0012] In some embodiments, the side wall surfaces of the two parallelly arranged cylindrical lithium batteries define a first accommodating groove and a second accommodating groove opposite in the front-rear direction;

[0013] The second lead piece is bent from the other end of the battery pack, extends to one end of the battery pack through the first accommodating groove, and the temperature sensor is arranged in the second accommodating groove.

[0014] The temperature sensor is arranged in the second accommodating groove, and the lead wire extends to the other end of the battery pack through the second accommodating groove and is bent around the battery pack to extend to one end of the battery pack through the first accommodating groove.

[0015] The part of the lead wire located in the first accommodating groove is arranged on the back side of the part of the second lead piece located in the first accommodating groove.

[0016] In some embodiments, the cylindrical lithium battery structure further comprises a first insulating tape, the first insulating tape comprises a first segment, a second segment and a third segment connected in sequence, the first segment is arranged in the first accommodating groove, the second segment is arranged at one end of the battery pack, and the third segment is arranged in the second accommodating groove to cover the temperature sensor and the part of the lead wire located in the second accommodating groove.

[0017] In some embodiments, the cylindrical lithium battery structure further comprises a second insulating tape, the second insulating tape is arranged in the first accommodating groove to cover the part of the second lead piece located in the first accommodating groove.

[0018] In some embodiments, the cylindrical lithium battery structure further comprises a third insulating tape, the insulating tape is arranged around the outside of the battery pack to fix the lead wire.

[0019] In some embodiments, the cylindrical lithium battery structure further comprises a sleeve, the sleeve comprises a first wall, a second wall, a third wall and a fourth wall connected in sequence, and the first wall, the second wall, the third wall and the fourth wall cover the upper side, the left side, the lower side and the right side of the battery pack respectively.

[0020] In some embodiments, the cylindrical lithium battery structure further comprises a first gasket and a second gasket, the first gasket is arranged between the battery pack and the sleeve and covers two first pieces at one end of the battery pack;

[0021] The second gasket is arranged between the battery pack and the sleeve and covers the second piece at the other end of the battery pack.

[0022] In some embodiments, the cylindrical lithium battery structure further comprises a first sponge and a second sponge, the first sponge is arranged outside the first wall;

[0023] The second sponge comprises a bottom sponge and two side sponges, the bottom sponge is arranged outside the third wall, and the two side sponges are arranged outside the second wall and the fourth wall respectively. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0025] Figure 1 is a structural schematic diagram of the cylindrical lithium battery structure of the embodiments of the present application;

[0026] Figure 2 is an exploded view of the cylindrical lithium battery structure of the embodiments of the present application;

[0027] Figure 3 is a top view of the first electrode connecting piece in the cylindrical lithium battery structure of the embodiments of the present application;

[0028] Figure 4 is a side view of the first electrode connecting piece in the cylindrical lithium battery structure of the embodiments of the present application;

[0029] Figure 5 is a state diagram of the installation step S100 of the cylindrical lithium battery structure of the embodiments of the present application;

[0030] Figure 6 is a state diagram of the installation step S200 of the cylindrical lithium battery structure of the embodiments of the present application;

[0031] Figure 7 is a state diagram of the installation step S300 of the cylindrical lithium battery structure of the embodiments of the present application;

[0032] Figure 8is a state diagram of the installation step S300 of the cylindrical lithium battery structure of the embodiment of the utility model;

[0033] Figure 9 is a state diagram of the installation step S400 of the cylindrical lithium battery structure of the embodiment of the utility model;

[0034] Figure 10 is a state diagram of the installation step S500 of the cylindrical lithium battery structure of the embodiment of the utility model;

[0035] Figure 11 is a state diagram of the installation step S500 of the cylindrical lithium battery structure of the embodiment of the utility model;

[0036] Figure 12 is a state diagram of the installation step S600 of the cylindrical lithium battery structure of the embodiment of the utility model.

[0037] In the figure,

[0038] 1, battery pack;101, first accommodating groove;102, second accommodating groove;103, cylindrical lithium battery;

[0039] 2, first electrode connecting piece;201, first sheet body;202, first lead-out piece;2021, first straight section;2022, first vertical section;2023, second straight section;

[0040] 3, second electrode connecting piece;301, second sheet body;302, second lead-out piece;

[0041] 4, temperature detection assembly;401, temperature sensor;402, lead-out wire;

[0042] 5, first insulating tape;101, first section;102, second section;103, third section;

[0043] 6, second insulating tape;

[0044] 7, third insulating tape;

[0045] 8, sleeve;801, first wall;802, second wall;803, third wall;804, fourth wall;

[0046] 9, first gasket;10, second gasket;

[0047] 11, first sponge;

[0048] 12, second sponge;121, bottom sponge;122, side sponge. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects solved by the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0050] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0051] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be glue injection inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] Figure 1 is a schematic structural diagram of a battery pack 1 in an embodiment of the present application, as Figure 1 shown, the embodiment of the present application provides a cylindrical lithium battery 103 structure, which comprises a battery pack 1, a plurality of first electrode connecting pieces 2 and second electrode connecting pieces 3.

[0053] As Figure 2 shown, the battery pack 1 comprises a plurality of cylindrical lithium batteries 103 arranged side by side, the cylindrical lithium battery 103 is in a cylindrical structure, and the two ends of the cylindrical lithium battery 103 are provided with electrodes.

[0054] It can be understood that one end of the battery pack and the cylindrical lithium battery is the end of the battery pack and the cylindrical lithium battery located above in the up-down direction, and the other end of the battery pack and the cylindrical lithium battery is the end of the battery pack and the cylindrical lithium battery located below in the up-down direction.

[0055] The plurality of first electrode connecting pieces 2 are respectively connected with the electrodes at one end of the plurality of cylindrical lithium batteries 103.

[0056] As Figure 2As shown, the first electrode connecting sheet 2 comprises a first sheet body 201 and a first leading-out sheet 202 connected with the first sheet body 201, and the plurality of first sheet bodies 201 are connected with the electrodes at one end of the plurality of cylindrical lithium batteries 103 respectively, and the first leading-out sheet 202 is provided with a through hole.

[0057] It can be understood that, by providing the through hole on the first leading-out sheet 202, the cross-sectional area of the region where the through hole is located is reduced, thereby reducing the local conduction area of the first leading-out sheet 202 and increasing the conduction impedance.

[0058] According to Joule's law, when the first leading-out sheet 202 passes through an abnormally large current, the region where the through hole is located will generate a large amount of heat, so that the first leading-out sheet 202 can be fused in time to cut off the current output circuit, thereby avoiding further occurrence of other abnormal problems.

[0059] It can be understood that, the maximum current that can be carried by the first leading-out sheet 202 can be adjusted by adjusting the diameter of the through hole, that is, different diameter through holes can be punched on the first leading-out sheet 202 according to different overload protection requirements of cylindrical lithium batteries of different specifications, which is simple and convenient.

[0060] As shown, Figure 2 The second electrode connecting sheet 3 comprises a second sheet body 301 and a second leading-out sheet 302 connected with the second sheet body 301, and the second sheet body 301 is connected with the electrodes at the other end of the plurality of cylindrical lithium batteries 103, and the second leading-out sheet 302 is bent and extended to one end of the battery pack 1 provided with the first electrode connecting sheet 2.

[0061] The cylindrical lithium battery structure of the embodiment of the utility model cuts off the output circuit in time by setting a through hole on the first leading-out sheet 202 of the first electrode connecting sheet 2 when the first leading-out sheet 202 passes through an abnormally large current, avoids further escalation of abnormal problems, greatly improves the safety of the cylindrical lithium battery structure of the embodiment of the utility model, and simultaneously, the application bends and extends the second leading-out sheet 302 of the second electrode connecting sheet 3 to one end of the battery pack 1 provided with the first electrode connecting sheet 2, that is, the positive and negative electrode sheets of the battery pack 1 are arranged at the same end, so that the positive and negative electrodes of the battery pack 1 can be output from the same end of the battery pack 1, and the space utilization of the cylindrical lithium battery structure of the embodiment of the utility model is greatly improved.

[0062] Therefore, the cylindrical lithium battery structure of the embodiment of the utility model has the characteristics of high safety and high space utilization.

[0063] In an embodiment of the utility model, as shown in Figure 3 and Figure 4As shown, the first lead-out sheet 202 comprises a first flat section 2021, a first vertical section 2022 and a second flat section 2023 connected in sequence, and the first flat section 2021 is provided with a through hole.

[0064] It can be understood that the first lead-out sheet 202 is arranged to extend forward as a whole, the first flat section 2021 and the first vertical section 2022 are perpendicular, and the first vertical section 2022 is perpendicular to the second flat section 2023.

[0065] The utility model discloses an embodiment cylindrical lithium cell structure through setting the first lead-out sheet 202 to comprise the first flat section 2021, the first vertical section 2022 and the second flat section 2023 connected in sequence, can adjust the size of the first flat section 2021, the first vertical section 2022 and the second flat section 2023 according to different connection demand, and then make the first lead-out can satisfy the connection demand of different external circuit, and the through hole is set on the first flat section 2021, can melt in time to cut off the output loop when the first flat section 2021 passes through the abnormally large current, avoids the further escalation of abnormal problem, and further improves the safety of the cylindrical lithium cell structure of the utility model embodiment.

[0066] In an embodiment of the utility model, as shown in Figure 2 The cylindrical lithium cell structure of the utility model embodiment further comprises a temperature detection assembly 4, the temperature detection assembly 4 comprises a temperature sensor 401 and a lead-out wire 402, the temperature sensor 401 is arranged between the two cylindrical lithium cells 103, one end of the lead-out wire 402 is connected with the temperature sensor 401, and the other end of the lead-out wire 402 is bent and extended to one end of the battery pack 1.

[0067] Optionally, the temperature sensor 401 is an NTC thermal sensor.

[0068] It can be understood that arranging the temperature detection assembly 4 between the two cylindrical lithium cells 103 can collect the temperature of the two cylindrical lithium cells 103 in real time to monitor the temperature of the cylindrical lithium cell 103 in real time, so that the staff can intervene and handle in time when the cylindrical lithium cell 103 has an overheating problem, the problem is avoided from escalation, and the safety of the cylindrical lithium cell structure of the utility model embodiment is further improved.

[0069] In an embodiment of the utility model, as shown in the figure 2, the side wall surfaces of the two adjacent cylindrical lithium cells 103 define the first accommodating groove 101 and the second accommodating groove 102 opposite in the front-back direction.

[0070] It can be understood that the cylindrical lithium cell 103 is in the shape of a cylinder, and the outer side surfaces of the two cylindrical lithium cells 103 parallel in the left-right direction abut to define the first accommodating groove 101 and the second accommodating groove 102 opposite in the front-back direction.

[0071] The second lead-out sheet 302 is bent upward from the other end of the battery pack, extends through the first accommodating groove 101 to the one end of the battery pack.

[0072] The temperature sensor 401 is arranged in the second accommodating groove 102, and the lead-out wire 402 extends through the second accommodating groove 102 to the other end of the battery pack 1, is bent around the battery pack 1, extends through the first accommodating groove 101 to the one end of the battery pack.

[0073] It can be understood that the lead-out wire 402 bent as described above can form a U-shaped structure so that part of the lead-out wire 402 can be accommodated in the first accommodating groove 101 and the second accommodating groove 102 respectively, greatly reducing the space occupied by the lead-out wire 402 and facilitating subsequent fixing of the lead-out wire 402.

[0074] The part of the lead-out wire 402 located in the first accommodating groove 101 is arranged at the back side of the part of the second lead-out sheet 302 located in the first accommodating groove 101, thereby further reducing the space occupied by the second lead-out sheet 302 and the lead-out wire 402 and facilitating subsequent fixing of the lead-out wire 402.

[0075] In an embodiment of the utility model, the cylindrical lithium battery structure of the embodiment of the utility model further includes a first insulating adhesive tape 5, as shown in the figure, the first insulating adhesive tape 5 is U-shaped as a whole, and the opening faces downward.

[0076] Further, the first insulating adhesive tape 5 includes a first section 101, a second section 102 and a third section 103 connected in sequence.

[0077] The first section 101 is arranged in the first accommodating groove 101 and between the part of the second lead-out sheet 302 located in the first accommodating groove 101 and the battery pack 1 to separate the part of the second lead-out sheet 302 located in the first accommodating groove 101 and the battery pack 1;

[0078] The second section 102 is arranged at one end of the battery pack 1 and between the part of the second lead-out sheet 302 located at the one end of the battery pack and the battery pack 1 to separate the part of the second lead-out sheet 302 located at the one end of the battery pack and the battery pack 1;

[0079] The third section 103 is arranged in the second accommodating groove 102 to cover the temperature sensor 401 and the part of the lead wire located in the second accommodating groove 102, thereby the third section 103 of the first insulating adhesive tape 5 can fix the part of the temperature sensor 401 and the lead wire located in the second accommodating groove 102 in the second accommodating groove 102.

[0080] The cylindrical lithium battery structure of the embodiment of the utility model improves the stability of the cylindrical lithium battery structure of the embodiment of the utility model through the first insulating adhesive tape 5, the second insulating adhesive tape 6 and the third insulating adhesive tape 7.

[0081] In an embodiment of the utility model, the cylindrical lithium battery structure of the embodiment of the utility model further includes a second insulating adhesive tape 6, the second insulating adhesive tape 6 is arranged in the first accommodating groove 101 to cover the part of the second lead-out sheet 302 located in the first accommodating groove 101, therefore, the second insulating adhesive tape 6 can further fix the part of the second lead-out sheet 302 located in the first accommodating groove 101 on the basis of separating the part of the second lead-out sheet 302 located in the first accommodating groove 101 from the part of the lead-out wire 402 located in the second accommodating groove 102, further improving the stability of the cylindrical lithium battery structure of the embodiment of the utility model.

[0082] In an embodiment of the utility model, the cylindrical lithium battery structure of the embodiment of the utility model further includes a third insulating adhesive tape 7, the third insulating adhesive tape 7 is arranged on the outer side of the battery group 1 to fix the lead-out wire 402, further improving the stability of the cylindrical lithium battery structure of the embodiment of the utility model.

[0083] In an embodiment of the utility model, the cylindrical lithium battery structure of the embodiment of the utility model further includes a sleeve 8, the sleeve 8 includes a first wall 801, a second wall 802, a third wall 803 and a fourth wall 804 connected head to tail, the first wall 801, the second wall 802, the third wall 803 and the fourth wall 804 cover the upper side, the left side, the lower side and the right side of the battery group 1 respectively.

[0084] The cylindrical lithium battery 103 of the embodiment of the utility model covers the upper side, the left side, the lower side and the right side of the battery group 1 through the sleeve 8 to fix the overall structure of the battery group 1, further improving the stability of the cylindrical lithium battery structure of the embodiment of the utility model.

[0085] In one embodiment of the present invention, the cylindrical lithium battery structure of the present invention further includes a first gasket 9 and a second gasket 10. The first gasket 9 is disposed between the battery pack 1 and the sleeve 8 and is located at one end of the battery pack 1 to cover the two first sheets 201; the second gasket 10 is disposed between the battery pack 1 and the sleeve 8 and is located at the other end of the battery pack 1 to cover the second sheet 301.

[0086] The cylindrical lithium battery 103 of this utility model embodiment can protect the first piece 201 of the first electrode connecting piece 2 and the second piece 301 of the second electrode connecting piece 3 by providing a first pad 9 and a second pad 10 at both ends of the battery pack 1 in the vertical direction, thereby preventing the first piece 201 of the first electrode connecting piece 2 and the second piece 301 of the second electrode connecting piece 3 from being damaged by external forces, and further improving the safety of the cylindrical lithium battery structure of this utility model embodiment.

[0087] In one embodiment of the present invention, the cylindrical lithium battery structure of the present invention further includes a first sponge 11 and a second sponge 12. The first sponge 11 is located outside the first wall 801; the second sponge 12 includes a bottom sponge 121 and two side sponges 122. The bottom sponge 121 is located outside the third wall 803, and the two side sponges 122 are respectively located outside the second wall 802 and outside the fourth wall 804. The first sponge 11 and the second sponge 12 form an annular structure covering the outside of the sleeve 8.

[0088] The cylindrical lithium battery 103 of this utility model embodiment, by providing a first sponge 11 and a second sponge 12, can form a sponge protective layer on the upper side, left side, lower side and right side of the battery pack 1, so as to prevent the battery pack 1 and related components, such as the first electrode connecting piece 2 and the second electrode connecting piece 3, from being damaged by external forces, and further improves the safety of the cylindrical lithium battery structure of this utility model embodiment.

[0089] The following is in conjunction with the appendix Figures 5-12 The following describes a method for installing the cylindrical lithium battery structure according to an embodiment of the present invention. The installation method includes the following steps:

[0090] Step S100: As Figure 5 As shown, the temperature detection component 4 is fixed in the second receiving groove 102 between two cylindrical lithium batteries 103 arranged side by side. Specifically, the temperature sensor 401 is placed in the second receiving groove 102, and the lead wire 402 extends downward beyond the lower end of the cylindrical lithium battery 103 for subsequent bending.

[0091] Step S200: As Figure 6 As shown, the first insulating tape 5 is pasted between the two cylindrical lithium batteries 103. Specifically:

[0092] The first section 101 of the first insulating tape 5 is arranged in the first accommodating groove 101 between the part of the second lead-out tab 302 located in the first accommodating groove 101 and the cylindrical lithium battery 103 to separate the part of the second lead-out tab 302 located in the first accommodating groove 101 from the cylindrical lithium battery 103.

[0093] The second section 102 of the first insulating tape 5 is arranged at the upper end of the battery pack 1 between the part of the second lead-out tab 302 located at the upper end of the cylindrical lithium battery 103 and the cylindrical lithium battery 103 to separate the part of the second lead-out tab 302 located at the upper end of the cylindrical lithium battery 103 from the cylindrical lithium battery 103.

[0094] The third section 103 of the first insulating tape 5 is arranged in the second accommodating groove 102 to cover the temperature sensor 401 and the part of the lead wire located in the second accommodating groove 102, so that the third section 103 of the first insulating tape 5 can fix the temperature sensor 401 and the part of the lead wire located in the second accommodating groove 102 in the second accommodating groove 102.

[0095] Step S300: as shown in Figure 7 and Figure 8 , the second tab body 301 of the second electrode connecting tab 3 is spot-welded to the electrode at the lower end of the two cylindrical lithium batteries 103, and the second electrode connecting tab 3 is fixed by the second insulating tape 6.

[0096] Step S400: as shown in Figure 9 , the two first electrode connecting tabs 2 are respectively welded to the ground electrodes at the upper end of the two cylindrical lithium batteries 103, specifically, the two first electrode connecting tabs 2 are respectively welded to the positive and negative electrodes of the two cylindrical lithium batteries 103.

[0097] Step S500: as shown in Figure 10 and Figure 11 , the lead wire 402 extended downward in step S100 is bent around the bottom of the battery pack 1 to the other side of the battery pack 1 and fixed by the third insulating tape 7, the first gasket 9 and the second gasket 10 are respectively pasted at the upper end and the lower end of the battery pack 1, and then the battery pack 1 is bound by the sleeve 8.

[0098] Step S600: as shown in Figure 12 , the first sponge 11 is pasted at the upper end of the battery pack 1, and the second sponge 12 is pasted at the lower end and the left and right sides of the battery pack 1, and the assembly is completed.

[0099] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A cylindrical lithium battery structure, characterized in that, include: Battery pack (1), the battery pack (1) includes a plurality of cylindrical lithium batteries (103) arranged in parallel. Multiple first electrode connecting pieces (2), each first electrode connecting piece (2) includes a first piece body (201) and a first lead-out piece (202) connected to the first piece body (201). The multiple first pieces (201) are respectively connected to the electrodes at one end of the multiple cylindrical lithium batteries (103). The first lead-out piece (202) is provided with a through hole. The second electrode connecting piece (3) includes a second sheet body (301) and a second lead-out piece (302) connected to the second sheet body (301). The second sheet body (301) connects to the electrodes at the other end of the plurality of cylindrical lithium batteries (103). The second lead-out piece (302) bends around the battery pack (1) and extends to the end of the battery pack (1) where the first electrode connecting piece (2) is provided.

2. The cylindrical lithium battery structure according to claim 1, characterized in that, The first lead-out piece (202) includes a first straight section (2021), a first vertical section (2022), and a second straight section (2023) connected in sequence. The first straight section (2021) is provided with a through hole.

3. The cylindrical lithium battery structure according to claim 1, characterized in that, It also includes a temperature detection component (4), which includes a temperature sensor (401) and a lead wire (402). The temperature sensor (401) is located between the two cylindrical lithium batteries (103). One end of the lead wire (402) is connected to the temperature sensor (401), and the other end of the lead wire (402) is bent around the battery pack (1) and extends to one end of the battery pack (1).

4. The cylindrical lithium battery structure according to claim 3, characterized in that, The sidewalls of two adjacent cylindrical lithium batteries (103) define a first receiving groove (101) and a second receiving groove (102) that are opposite each other in the front-rear direction. The second lead-out piece (302) is bent from the other end of the battery pack (1) and extends through the first receiving groove (101) to one end of the battery pack; The temperature sensor (401) is located in the second receiving groove (102). The lead wire (402) extends through the second receiving groove (102) to the other end of the battery pack (1), then bends around the battery pack (1) and extends through the first receiving groove (101) to one end of the battery pack (1). The lead wire (402) is located in the portion of the first receiving groove (101) and overlaps the portion of the second lead piece (302) located in the first receiving groove (101) on the rear side.

5. The cylindrical lithium battery structure according to claim 4, characterized in that, It also includes a first insulating tape (5), which includes a first segment (101), a second segment (102) and a third segment (103) connected in sequence. The first segment (101) is located in the first receiving groove (101), the second segment (102) is located at one end of the battery pack (1), and the third segment (103) is located in the second receiving groove (102) to cover the portion of the temperature sensor (401) and the lead wire (402) located in the second receiving groove (102).

6. The cylindrical lithium battery structure according to claim 4, characterized in that, It also includes a second insulating tape (6), which is disposed in the first receiving groove (101) to cover the portion of the second lead sheet (302) located in the first receiving groove (101).

7. The cylindrical lithium battery structure according to claim 4, characterized in that, It also includes a third insulating tape (7), which is wrapped around the outside of the battery pack 1 to fix the lead wire (402).

8. The cylindrical lithium battery structure according to claim 1, characterized in that, It also includes a sleeve (8), which includes a first wall (801), a second wall (802), a third wall (803) and a fourth wall (804) connected end to end. The first wall (801), the second wall (802), the third wall (803) and the fourth wall (804) respectively cover the upper side, the left side, the lower side and the right side of the battery pack (1).

9. The cylindrical lithium battery structure according to claim 8, characterized in that, It also includes a first gasket (9) and a second gasket (10), wherein the first gasket (9) is disposed between the battery pack (1) and the sleeve (8) and is located at one end of the battery pack to cover the two first pieces (201). The second gasket (10) is disposed between the battery pack (1) and the sleeve (8) and is located at the other end of the battery pack to cover the second sheet (301).

10. The cylindrical lithium battery structure according to claim 8, characterized in that, It also includes a first sponge (11) and a second sponge (12), wherein the first sponge (11) is disposed on the outside of the first wall (801); The second sponge (12) includes a bottom sponge (121) and two side sponges (122). The bottom sponge (121) is located on the outside of the third wall (803), and the two side sponges (122) are located on the outside of the second wall (802) and the outside of the fourth wall (804), respectively.

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