CN207038571U - Secondary cell - Google Patents

Abstract

The utility model provides a kind of secondary cell, and it includes cap assembly, battery core and insulation frame.Cap assembly includes coping plate, and coping plate offers liquid injection hole；Battery core has the first lug.Insulation frame is arranged between coping plate and battery core, and with below the liquid injection hole and downward projection of convex closure, and the upside towards coping plate of convex closure is to lower recess to form the cavity connected with liquid injection hole.Convex closure is formed with the first passage and second channel connected with cavity, and the opening of first passage one end is located at the top surface of convex closure, and the opening of second channel one end is located at the side of convex closure.Because convex closure is formed with second channel, and the opening of second channel one end is located at the side of convex closure, therefore, in the fluid injection of secondary cell or formation process, even if the first lug extends to the lower section of the top surface of convex closure and blocks first passage, fluid injection or pumping can also be carried out by the second channel of liquid injection hole, cavity and convex closure.

Description

Secondary cell

Technical field

It the utility model is related to field of batteries, more particularly to a kind of secondary cell.

Background technology

Secondary cell generally comprises battery core, housing, cap assembly and insulation frame, wherein, battery core is housed in housing, top cover Component is assembled together with housing, and the lug of battery core electrically connects with the pole on cap assembly.Insulation frame is fixed on cap assembly Coping plate downside so that battery core and coping plate to be separated, so as to avoid lug from being electrically connected with the other parts of coping plate.Top cover Piece is provided with liquid injection hole.The frame that insulate needs to set occlusion part in the downside of the liquid injection hole of coping plate, to prevent lug and liquid injection hole Hole wall overlap joint；Occlusion part is provided with the through hole relative with liquid injection hole, to realize the fluid injection of secondary cell and chemical conversion.But one For a little secondary cells because Structural Design Requirement and overhead space are limited, liquid injection hole can only be arranged on the upside of the lug of battery core； Meanwhile in order to increase energy density, secondary cell inner space needs to arrange very compact again, and therefore, the lug of battery core very may be used The through hole relative with liquid injection hole of insulation frame can be blocked, in negative pressure formation process, leads to not take out secondary cell inside Vacuum.

Utility model content

In view of problem present in background technology, the purpose of this utility model is to provide a kind of secondary cell, and it can be While reducing short-circuit risks, the fluid injection and chemical conversion of secondary cell can be realized.

To achieve these goals, the utility model provides a kind of secondary cell, it include cap assembly, battery core and Insulate frame.Cap assembly includes coping plate, and coping plate offers liquid injection hole；Battery core has the first lug.Insulation frame is arranged on top Between cover plate and battery core, and with below the liquid injection hole and downward projection of convex closure, convex closure towards the upper lateral of coping plate Lower recess is to form the cavity connected with liquid injection hole.Convex closure is formed with the first passage and second channel connected with cavity, and The opening of one passage end is located at the top surface of convex closure, and the opening of second channel one end is located at the side of convex closure.

The beneficial effects of the utility model are as follows：

According in secondary cell of the present utility model, convex closure can separate the first lug of battery core with liquid injection hole, from And avoid the first lug from being contacted with the hole wall of liquid injection hole, prevent short circuit.Because convex closure is formed with second channel, and second channel one End opening located at convex closure side, therefore, in the fluid injection of secondary cell or formation process, even if the first lug extend to it is convex First passage is simultaneously blocked in the lower section of the top surface of bag, can also carry out fluid injection by the second channel of liquid injection hole, cavity and convex closure Or pumping.In a word, by setting first passage and second channel on convex closure, short-circuit risks can be both reduced, are not also interfered with The fluid injection process and formation process of secondary cell.

Brief description of the drawings

Fig. 1 is the schematic diagram according to secondary cell of the present utility model；

Fig. 2 is the enlarged drawing of Fig. 1 round frames part；

Fig. 3 to Fig. 5 is the schematic diagram according to the different embodiments of the insulation frame of secondary cell of the present utility model；

Fig. 6 is the connection diagram of battery core, the first switching piece and the first pole.

Wherein, description of reference numerals is as follows：

The side of 1 cap assembly 312

The lateral margin of 11 coping plate 32 first

The lateral margin of 111 liquid injection hole 33 second

The through hole of 12 first pole 34

The switching piece of 13 second pole 4 first

The housing of 2 battery core 5

21 first lug S cavitys

211 first connecting portion P1 first passages

212 first kink P2 second channels

22 second lug G gaps

23 main body H short transverses

3 insulation frame W widths

31 convex closure L length directions

311 top surfaces

Embodiment

Describe secondary cell of the present utility model in detail with reference to the accompanying drawings.

Referring to figs. 1 to Fig. 6, cap assembly 1, battery core 2 and insulation frame 3 are included according to secondary cell of the present utility model. Cap assembly 1 includes coping plate 11, and coping plate 11 offers liquid injection hole 111；Battery core 2 has the first lug 21.Insulation frame 3 is set Between coping plate 11 and battery core 2, and with positioned at the lower section of liquid injection hole 111 and downward projection of convex closure 31, convex closure 31 towards The upside of coping plate 11 is to lower recess to form the cavity S connected with liquid injection hole 111.Convex closure 31 is formed with connecting with cavity S First passage P1 and second channel P2, and being open for first passage P1 one end is located at the top surface 311 of convex closure 31, and second channel P2 The opening of one end is located at the side 312 of convex closure 31.

According in secondary cell of the present utility model, convex closure 31 can be by the first lug 21 and liquid injection hole 111 of battery core 2 Separate, so as to avoid the first lug 21 from being contacted with the hole wall of liquid injection hole 111, prevent short circuit.Because convex closure 31 is logical formed with second Road P2, and the opening of second channel P2 one end is located at the side 312 of convex closure 31, therefore, fluid injection or chemical conversion work in secondary cell In sequence, even if the first lug 21 extends to the lower section of the top surface 311 of convex closure 31 and blocks first passage P1, note can also be passed through The second channel P2 of fluid apertures 111, cavity S and convex closure 31 carries out fluid injection or pumping.In a word, led to by setting first on convex closure 31 Road P1 and second channel P2, can both reduce short-circuit risks, also not interfere with the fluid injection process and formation process of secondary cell.

First passage P1 is arranged at the underface of liquid injection hole 111.

Insulation frame 3 has flat matrix, and convex closure 31 is one layer of thin-wall construction of the indent evagination being arranged on matrix. The opening of the first passage P1 other ends and the opening of the second channel P2 other ends directly connect with cavity S.

According in secondary cell of the present utility model, reference picture 2, the first lug 21 extends to the top surface 311 of convex closure 31 Downside.In order to improve the compactedness of secondary cell internal structure, increase the area of passage of the first lug 21, the first lug 21 is excellent Choosing along its length L extend to convex closure 31 top surface 311 downside.And due to second channel P2 presence, without having to worry about because of mistake Grow and influence fluid injection process and formation process.

According in secondary cell of the present utility model, reference picture 1, Fig. 2 and Fig. 6, cap assembly 1 include：First pole 12, it is arranged at coping plate 11.The secondary cell also includes：First switching piece 4, the first pole 12 and the first lug 21 are connected, And positioned at downside of the insulation frame 3 along short transverse H.

Reference picture 1, Fig. 3, Fig. 4 and Fig. 5, insulation frame 3 are provided with the through hole 34 passed through for the first pole 12.First pole 12 Bottom welds together after passing through through hole 34 with the first switching piece 4.

Wherein, the first switching piece 4 can be located at the L along its length of convex closure 31 outside, and the first switching piece 4 and convex closure 31 it Between leave clearance G.The position of second channel P2 on convex closure 31 and quantity can be set according to demand, and the first switching piece 4 with It is to prevent the second channel P2 relative with the first switching piece 4 to be plugged that clearance G is left between convex closure 31.Further, Gap G directly connects with second channel P2.

According in secondary cell of the present utility model, reference picture 1 and Fig. 6, battery core 2 also have the lug of main body 23 and second 22, and the first lug 21 and the second lug 22 are arranged in main body 23.Cap assembly 1 also includes what is electrically connected with the second lug 22 Second pole 13.

According in secondary cell of the present utility model, reference picture 2 and Fig. 6, the first lug 21 have：First connecting portion 211, it is fixed on downside of first switching piece 4 along short transverse H；And first kink 212, it is folded into first connecting portion 211 Along the downside of short transverse H.The angle that first kink 212 and first connecting portion 211 are formed is 0 °~45 ° or 85 °~95 °. Because first connecting portion 211 is horizontal, therefore, when L is longer along its length for it, easily the top surface 311 with convex closure 31 pastes First passage P1 is blocked in merging.

In the embodiment according to secondary cell of the present utility model, reference picture 5, second channel P2 can be multiple.Institute Stating multiple second channel P2, preferably circumferentially array is evenly arranged.Certainly, with reference to 4, second channel P2 is alternatively one.

In another embodiment according to secondary cell of the present utility model, reference picture 3, second channel P2 and first passage P1 is connected as a single entity the passage of insertion.The passage integrally penetrated needs to be all provided with out in the top surface 311 of convex closure 31 and side 312 Mouthful.

According in secondary cell of the present utility model, reference picture 2, the secondary cell also includes：Housing 5, with top cover Piece 11 be assembled together and house battery core 2 and insulation frame 3；Insulation frame 3 in the width direction W both ends be provided with extend downwardly first Lateral margin 32, the first lug 21 is separated with housing 5.Certainly, the insulate L along its length of frame 3 outer end can be also provided with to downward The second lateral margin 33 stretched, the first lug 21 is separated with housing 5.First lateral margin 32 and the second lateral margin 33 can avoid the first pole Ear 21 contacts with housing 5, prevents short circuit.

According in secondary cell of the present utility model, insulation frame 3 is made up of plastic cement.

Claims (10)

1. a kind of secondary cell, including cap assembly (1), battery core (2) and insulation frame (3), cap assembly (1) include coping plate (11), coping plate (11) offers liquid injection hole (111)；Battery core (2) has the first lug (21)；

Characterized in that,

Insulation frame (3) is arranged between coping plate (11) and battery core (2), and is had below liquid injection hole (111) and dashed forward downwards The convex closure (31) gone out, what the upside towards coping plate (11) of convex closure (31) was connected to lower recess with being formed with liquid injection hole (111) Cavity (S)；

Convex closure (31) is formed with the first passage (P1) and second channel (P2) connected with cavity (S), and first passage (P1) one The opening at end is located at the top surface (311) of convex closure (31), and the opening of second channel (P2) one end is located at the side of convex closure (31) (312)。

2. secondary cell according to claim 1, it is characterised in that the first lug (21) extends to the top surface of convex closure (31) (311) downside.

3. secondary cell according to claim 1 or 2, it is characterised in that

Cap assembly (1) includes：First pole (12), it is arranged at coping plate (11)；

The secondary cell also includes：First switching piece (4), the first pole of connection (12) and the first lug (21), and positioned at exhausted Downside of the edge frame (3) along short transverse (H).

4. secondary cell according to claim 3, it is characterised in that the first switching piece (4) is located at convex closure (31) along length The outside in direction (L), and gap (G) is left between the first switching piece (4) and convex closure (31).

5. secondary cell according to claim 4, it is characterised in that gap (G) directly connects with second channel (P2).

6. secondary cell according to claim 3, it is characterised in that the first lug (21) has：

First connecting portion (211), it is fixed on downside of the first switching piece (4) along short transverse (H)；And

First kink (212), it is folded into downside of the first connecting portion (211) along short transverse (H).

7. secondary cell according to claim 1, it is characterised in that second channel (P2) is multiple.

8. secondary cell according to claim 1, it is characterised in that second channel (P2) and first passage (P1) are linked as one The passage of body insertion.

9. secondary cell according to claim 1, it is characterised in that

The secondary cell also includes：Housing (5), be assembled together with coping plate (11) and house battery core (2) and insulation frame (3)；

The both ends of insulation frame (3) (W) in the width direction are provided with the first lateral margin (32) for extending downwardly, by the first lug (21) with Housing (5) separates.

10. secondary cell according to claim 1, it is characterised in that

The secondary cell also includes：Housing (5), be assembled together with coping plate (11) and house battery core (2) and insulation frame (3)；

The outer end of insulation frame (3) (L) along its length is provided with the second lateral margin (33) for extending downwardly, by the first lug (21) with Housing (5) separates.