CN219203447U

CN219203447U - Battery cell and battery module

Info

Publication number: CN219203447U
Application number: CN202320006164.XU
Authority: CN
Inventors: 康效玉
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2023-01-03
Filing date: 2023-01-03
Publication date: 2023-06-16
Anticipated expiration: 2033-01-03

Abstract

The utility model belongs to the technical field of batteries and discloses a battery core and a battery module. According to the battery core, when the tab is subjected to desoldering, the fastening piece and the tab can be detached from the battery core main body together, the fastening piece and the tab are replaced, the fastening piece is arranged in a penetrating mode, the tab is pressed on the pole block or the connection mode of the tab and the tab is welded to realize the electric connection of the tab and the pole assembly, a user can freely select the connection mode according to the condition of field equipment, the user can conveniently maintain the battery core by himself, time and labor are saved, the secondary welding effect is not influenced, the pole block and the pole body are detachably connected, the pole block and the fastening piece can be replaced together, and the influence on the battery core due to threaded abrasion is avoided.

Description

Battery cell and battery module

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cell and a battery module.

Background

With the continuous development of new energy industries, lithium batteries are being used by various industries as energy storage units. The battery module comprises a plurality of electric cores, in order to prolong the duration of the battery module, more electric cores are required to be arranged in a limited space as much as possible, and as the number of the electric cores is increased, the electric core consistency problem gradually becomes the focus of attention of industry practitioners, when a single electric core in the battery module is in a problem, the performance of the whole battery system can be influenced, and the system can not work normally when serious.

In the prior art, when a problem occurs in connection of single electric core in the battery module, the battery module needs to be detached from the battery box, and re-welding is performed through professional laser welding equipment. However, some users do not have such devices, and need to send the problem module back to the battery manufacturer, which is time-consuming and labor-consuming. In addition, before the secondary welding, the pole needs to be polished, so that no residual welding slag exists on the welding surface, the secondary welding effect can be influenced by slightly leaving one wire, and the module is caused to have the risk of welding off again in the using process. Therefore, a battery cell and a battery module are needed to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a battery cell which is convenient for a user to maintain by himself, saves time and labor and does not influence the secondary welding effect.

To achieve the purpose, the utility model adopts the following technical scheme:

provided is a battery cell including:

a cell body;

the pole assembly comprises a pole body arranged on the battery core main body, a pole block arranged at the end part of the pole body and a fastener in threaded connection with the pole block, and the pole block is detachably connected with the pole body; wherein,,

the fastening piece can penetrate through the tab and tightly press the tab onto the pole block or can be welded with the tab so as to realize the electric connection between the tab and the pole assembly.

Optionally, the end part of the pole body is provided with a protrusion, the end part of the protrusion is provided with a groove, the inner side surface of the groove is provided with a plurality of first clamping grooves at intervals along the circumferential direction, and the pole block is arranged in the groove;

the periphery side of utmost point post piece be provided with a plurality of with the bulb plunger that first draw-in groove one-to-one set up, the bulb plunger can with first draw-in groove joint is in order to realize utmost point post piece with fix between the utmost point post body.

Optionally, the periphery side of utmost point post piece be provided with a plurality of with bulb plunger one-to-one's mounting groove, the bulb plunger include set up in bulb and the elastomer in the mounting groove, part the bulb is arranged in outside the mounting groove, the elastomer is configured to provide the bulb towards the power of removing outside the mounting groove.

Optionally, the pole piece further comprises a pole cover plate, wherein the pole cover plate is arranged at the end part of the protrusion, and the pole cover plate abuts against the pole piece.

Optionally, a plurality of clamping tongues are arranged on the peripheral side face of the bulge at intervals along the circumferential direction, a plurality of second clamping grooves corresponding to the clamping tongues one to one are formed in the pole cover plate, and the clamping tongues are clamped in the second clamping grooves to fix the pole cover plate.

Optionally, the fastener is echelonment, the tip week side of fastener is provided with the external screw thread, be provided with the perforation on the utmost point post piece, be provided with in the perforation with the external screw thread matching connection's of fastener internal thread.

Optionally, a straight or cross groove is arranged on the large end face of the fastener.

Optionally, a pressure release valve is arranged on the battery cell main body.

Optionally, the electric core main part include the casing and set up in upper cover plate on the casing, be provided with on the upper cover plate with the utmost point post hole that the utmost point post subassembly set up corresponds, the utmost point post subassembly expose in the utmost point post hole sets up.

Another object of the present utility model is to provide a battery module, which includes a plurality of the above-mentioned battery cells, and a plurality of the battery cells are electrically connected through the tabs.

The utility model has the beneficial effects that:

according to the battery cell provided by the utility model, when the tab on the battery cell is subjected to desoldering, the fastening piece and the tab can be detached from the battery cell main body together, a new fastening piece and a new tab are replaced, the fastening piece is penetrated through and arranged on the tab, or the tab is pressed on the pole block or welded with the tab in two connection modes, so that the electrical connection between the tab and the pole block is realized, a user can freely select the connection mode according to the condition of field equipment, the self-maintenance of the user is facilitated, the time and the labor are saved, and the secondary welding effect is not influenced. In addition, the fastener is dismantled repeatedly and can be caused the screw thread wearing and tearing of utmost point post piece, and then causes the fastener unable and utmost point post cooperation, or appears that the fit clearance is too big, causes junction resistance too big, and then leads to the circumstances that seriously generates heat, and the utmost point post piece can be dismantled with the utmost point post body and be connected, can together change utmost point post piece and fastener, avoids influencing the performance of electric core or lead to the condition emergence that the electric core is scrapped because of screw thread wearing and tearing.

According to the battery module provided by the utility model, when the tabs on the battery core are subjected to desoldering, the battery module is convenient for a user to maintain by himself, and time and labor are saved.

Drawings

FIG. 1 is an exploded view of a partial structure of a cell provided by the present utility model;

FIG. 2 is a partial cross-sectional view of a pole assembly provided by the present utility model;

FIG. 3 is an exploded view of the pole assembly provided by the present utility model;

FIG. 4 is an exploded view of a cell provided by the present utility model;

fig. 5 is a schematic structural diagram of a battery cell according to the present utility model;

FIG. 6 is a schematic view of the manner in which the fastener and the tab are welded according to the present utility model;

FIG. 7 is a schematic view of the connection of the fastener penetrating tab provided by the utility model;

fig. 8 is a schematic diagram of a process of replacing a tab of a battery module according to the present utility model.

In the figure:

110. a cell body; 111. a housing; 112. an upper cover plate; 1121. a pressure release valve; 1122. a post hole;

120. a pole assembly; 121. a pole body; 1211. a protrusion; 1212. a groove; 1213. a first clamping groove; 1214. a clamping tongue; 122. a pole block; 1221. ball plunger; 12211. ball head; 12212. an elastomer; 1222. a mounting groove; 1223. perforating; 123. a fastener; 124. a pole cover plate; 1241. a second clamping groove;

200. a wafer; 210. a first tab; 220. a second tab;

310. an end plate; 320. plastic steel belt.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 1 to 7, the present embodiment provides a battery module, which includes a plurality of battery cells electrically connected through a tab 200.

Specifically, according to the use requirement, a plurality of electric cells can be connected in series or in parallel, and preferably, the electric cells are connected in series.

Further, a plurality of battery cells are arranged side by side along a direction, so that the battery module is convenient to put and arrange.

Further, the battery module further comprises two end plates 310, the two end plates 310 are positioned at two ends of the battery module along the arrangement direction of the electric cells, the battery module further comprises at least one plastic steel belt 320, and the end plates 310 and the electric cells are bound together through the plastic steel belt 320.

Specifically, the battery core includes a battery core main body 110 and a pole assembly 120, the pole assembly 120 includes a pole body 121 disposed on the battery core main body 110, a pole block 122 disposed at an end of the pole body 121, and a fastener 123 in threaded connection with the pole block 122, where the pole block 122 is detachably connected with the pole body 121; wherein the fastener 123 can be threaded through the tab 200 and compress the tab 200 against the pole piece 122 or the fastener 123 can be welded to the tab 200 to achieve an electrical connection of the tab 200 to the pole assembly 120.

In this embodiment, when the tab 200 on the battery cell of the battery module is subjected to desoldering, the user can maintain the battery conveniently, and time and labor are saved. Specifically, when the tab 200 on the battery core is subjected to desoldering, the fastening piece 123 and the tab 200 can be detached from the battery core main body 110, the fastening piece 123 and the tab 200 are replaced, the fastening piece 123 is arranged to penetrate through the tab 200, the tab 200 is pressed on the pole block 122 or the tab 200 is welded with the two connection modes, so that the tab 200 and the pole assembly 120 are electrically connected, a user can freely select the connection mode according to the condition of field equipment, the user can conveniently and automatically maintain the battery core, time and labor are saved, and the secondary welding effect is not affected. In addition, the fastener 123 is dismantled repeatedly and can lead to the screw wearing and tearing of utmost point post piece 122, and then causes the unable cooperation of fastener 123 with utmost point post, or appears that the fit clearance is too big, causes the junction resistance too big, and then leads to the circumstances that seriously generates heat, and utmost point post piece 122 can be dismantled with utmost point post body 121 and be connected, can together change utmost point post piece 122 and fastener 123, avoids influencing the performance of electric core or the condition emergence that leads to the electric core to scrap because of screw wearing and tearing.

Specifically, the post assembly 120 is provided with two positive and negative electrodes corresponding to the battery cells, respectively.

Specifically, the cell main body 110 is provided with a pressure release valve 1121.

Specifically, the battery cell main body 110 includes a housing 111 and an upper cover plate 112 disposed on the housing 111, and a pole hole 1122 corresponding to the pole assembly 120 is disposed on the upper cover plate 112, and the pole assembly 120 is exposed from the pole hole 1122, so as to facilitate assembly of the battery cell. Further, a relief valve 1121 is provided on the upper cover plate 112.

In the present embodiment, referring to fig. 1 to 3, the end of the pole body 121 is provided with a protrusion 1211, the end of the protrusion 1211 is provided with a groove 1212, the inner side surface of the groove 1212 is provided with a plurality of first clamping grooves 1213 circumferentially spaced apart, and the pole block 122 is disposed in the groove 1212. Further, a plurality of ball plungers 1221 corresponding to the first clamping grooves 1213 are disposed on the periphery of the pole block 122, and the ball plungers 1221 can be clamped with the first clamping grooves 1213 to fix the pole block 122 and the pole body 121, so as to facilitate the disassembly of the pole block 122.

Specifically, the circumferential side of the pole piece 122 is provided with a plurality of mounting slots 1222 in one-to-one correspondence with the ball plunger 1221, the ball plunger 1221 including a ball 12211 and an elastomer 12212 disposed within the mounting slot 1222, a portion of the ball 12211 being disposed outside the mounting slot 1222, the elastomer 12212 being configured to provide a force to move the ball 12211 out of the mounting slot 1222. In the present embodiment, during the process of installing the pole block 122 in the groove 1212, the ball head 12211 abuts against the inner side surface of the groove 1212 and is pressed into the installation groove 1222, when the ball head 12211 corresponds to the first clamping groove 1213, under the action of the elastic body 12212, part of the ball head 12211 moves out of the installation groove 1222 and is placed into the first clamping groove 1213, so as to complete the clamping, and achieve the fixation between the pole block 122 and the pole body 121.

Preferably, the elastic body 12212 is a spring.

Specifically, the battery cell further includes a post cover 124, where the post cover 124 is disposed at an end of the protrusion 1211, and the post cover 124 abuts against the post block 122 to prevent the post block 122 from being separated from the groove 1212 due to an unexpected situation.

Specifically, the circumferential side surface of the protrusion 1211 is provided with a plurality of clamping tongues 1214 at intervals along the circumferential direction, the pole cover plate 124 is provided with a plurality of second clamping grooves 1241 corresponding to the clamping tongues 1214 one to one, and the clamping tongues 1214 are clamped in the second clamping grooves 1241 to fix the pole cover plate 124, so as to facilitate the disassembly and assembly of the pole cover plate 124.

In this embodiment, as shown in fig. 1 and 3, the fastening member 123 is stepped, the small end periphery of the fastening member 123 is provided with external threads, the pole block 122 is provided with a through hole 1223, the through hole 1223 is internally provided with internal threads in matching connection with the external threads of the fastening member 123, and the tab 200 is pressed on the pole block 122 through the large end of the fastening member 123, so that the pole block is stable and reliable.

Specifically, the large end face of the fastener 123 is printed with a positive or negative steel seal for identifying the positive and negative poles of the battery cell.

Specifically, a word or cross groove 1212 is provided on the large end face of the fastener 123, which facilitates the disassembly and assembly of the fastener 123.

As shown in fig. 8, when the second cell connection of the battery module is problematic, the battery module is first detached from the battery case and then the first tab 210 and the second tab 220 are cut off by the cutting tool; then the fastener 123 welded with the first tab 210 and the second tab 220 is unscrewed from the pole piece 122 and a new fastener 123 is installed; finally, the welding is performed again with a new tab 200. If the user does not have a corresponding welding tool on site, the tab 200 with a through hole can be selected, the small end of the fastening piece 123 is inserted through the through hole of the tab 200 and the through hole 1223 of the pole block 122, and the fastening piece 123 is fixedly connected with the pole block 122 in a threaded connection manner so as to fix the tab 200. In addition, when the battery core has a problem and needs to be replaced, the plastic steel belt 320 can be loosened, then the battery core with the problem is replaced, and after the replacement is completed, the tab 200 is penetrated through the fastener 123 and the tab 200 is pressed on the pole block 122 or one of two connection modes of welding with the tab 200 is used for installing the tab 200, so that the tab 200 and the pole assembly 120 are connected into a whole.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The electric core, its characterized in that includes:

a cell body (110);

the pole assembly (120) comprises a pole body (121) arranged on the battery core main body (110), a pole block (122) arranged at the end part of the pole body (121) and a fastener (123) in threaded connection with the pole block (122), wherein the pole block (122) is detachably connected with the pole body (121); wherein,,

the fastening piece (123) can penetrate through the tab (200) and press the tab (200) onto the pole block (122) or the fastening piece (123) can be welded with the tab (200) so as to realize the electrical connection of the tab (200) and the pole assembly (120).

2. The cell of claim 1, wherein an end of the terminal body (121) is provided with a protrusion (1211), an end of the protrusion (1211) is provided with a groove (1212), a plurality of first clamping grooves (1213) are circumferentially spaced on an inner side surface of the groove (1212), and the terminal block (122) is disposed in the groove (1212);

the periphery of the pole block (122) is provided with a plurality of ball plungers (1221) which are arranged in one-to-one correspondence with the first clamping grooves (1213), and the ball plungers (1221) can be clamped with the first clamping grooves (1213) so as to fix the pole block (122) and the pole body (121).

3. The cell of claim 2, wherein a plurality of mounting slots (1222) are provided on a peripheral side of the pole block (122) in one-to-one correspondence with the ball plunger (1221), the ball plunger (1221) including a ball (12211) and an elastomer (12212) disposed within the mounting slot (1222), a portion of the ball (12211) being disposed outside the mounting slot (1222), the elastomer (12212) being configured to provide a force that moves the ball (12211) out of the mounting slot (1222).

4. The cell of claim 2, further comprising a post cover (124), the post cover (124) being disposed at an end of the protrusion (1211), and the post cover (124) abutting against the post block (122).

5. The battery cell according to claim 4, wherein a plurality of clamping tongues (1214) are circumferentially arranged on the circumferential side surface of the protrusion (1211) at intervals, a plurality of second clamping grooves (1241) corresponding to the clamping tongues (1214) one by one are arranged on the pole cover plate (124), and the clamping tongues (1214) are clamped in the second clamping grooves (1241) to fix the pole cover plate (124).

6. The battery cell according to claim 1, wherein the fastening piece (123) is in a ladder shape, an external thread is arranged on the periphery of the small end of the fastening piece (123), a through hole (1223) is arranged on the pole block (122), and an internal thread which is in matched connection with the external thread of the fastening piece (123) is arranged in the through hole (1223).

7. The cell of claim 6, wherein the fastener (123) is provided with a straight or cross groove (1212) on the large end face.

8. The cell according to claim 1, wherein a pressure relief valve (1121) is provided on the cell body (110).

9. The battery cell according to claim 1, wherein the battery cell main body (110) comprises a housing (111) and an upper cover plate (112) arranged on the housing (111), a pole hole (1122) arranged corresponding to the pole assembly (120) is arranged on the upper cover plate (112), and the pole assembly (120) is exposed out of the pole hole (1122).

10. Battery module, characterized in that it comprises a plurality of electric cells according to any one of claims 1-9, wherein a plurality of electric cells are electrically connected through the tabs (200).