CN217035894U - Electric connector and electric core charging and discharging test electric connection structure - Google Patents
Electric connector and electric core charging and discharging test electric connection structure Download PDFInfo
- Publication number
- CN217035894U CN217035894U CN202122967126.4U CN202122967126U CN217035894U CN 217035894 U CN217035894 U CN 217035894U CN 202122967126 U CN202122967126 U CN 202122967126U CN 217035894 U CN217035894 U CN 217035894U
- Authority
- CN
- China
- Prior art keywords
- clamping part
- conductive
- clamping
- electric
- connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses an electric connector which comprises a conductive main body, wherein at least one end of the conductive main body is provided with a first clamping part and a second clamping part of a branched structure, and the first clamping part and the second clamping part are provided with opposite conductive clamping surfaces. The first clamping part and the second clamping part form a clamping structure, so that current is led out from the conductive clamping surfaces of the first clamping part and the second clamping part, and compared with an integrated electric connector, the contact surface of the electric connector and the conductive piece is increased and the contact resistance is reduced on the basis of the same contact pressure; when the electric connector is used for overcurrent charging and discharging, the increase of the contact area can accelerate the heat dissipation; electric connector is little with the contact resistance of electrically conductive in the electric connection structure of electric core charge-discharge test, and heat transfer area increases, from deriving the heat and reducing the cooling of electrically conductive in two aspects of heat production. The utility model also discloses a battery cell charging and discharging test electric connection structure comprising the electric connection piece.
Description
Technical Field
The utility model relates to the technical field of lithium ion batteries, in particular to an electric connector and a battery cell charging and discharging test electric connection structure.
Background
The electrical connection structure (shown in fig. 1) for the charge and discharge test of the lithium ion battery includes: the conductive piece is welded with the electrode of the battery core, and the extending end of the conductive piece is provided with a through hole; the conductive piece connecting end of the charge and discharge test wire is also provided with through holes, and the two through holes are overlapped and fully crimped through bolts, gaskets and nuts. In order to satisfy the overcurrent capacity of rapid charging and discharging, the connecting end of the conductive piece is a connecting piece with a certain thickness.
The charging and discharging test electric connection structure has the following defects: the conductive piece and the conductive contact piece of the charge and discharge test wire are actually the parts compressed by the bolt and the nut. The charge and discharge test of the lithium ion battery comprises the steps of quick charge at a high temperature of 45 ℃, overlarge current, quick rise of the temperature of a welding end of the conductive piece and the temperature of the conductive piece per se and maintenance of the temperature in a higher range. When the current of the quick charging section is 386.4A, the highest temperature of the conductive piece can reach more than 90 ℃, the high-temperature state and the low-temperature state of the crimping position of the bolt and the nut are repeatedly switched, so that the bolt connection is loosened, the contact resistance of the crimping position is increased, the temperature of the crimping position is further increased, and the precision of the charging and discharging test of the battery core is also influenced.
SUMMERY OF THE UTILITY MODEL
One of the objectives of the present invention is to overcome the drawbacks of the prior art and to provide an electrical connector having a first clamping portion and a second clamping portion in a clamping structure, which has high connection stability with a conductive member and a small contact resistance.
In order to achieve the technical effects, the technical scheme of the utility model is as follows: an electric connector comprises an electric conduction main body, wherein at least one end of the electric conduction main body is provided with a first clamping part and a second clamping part of a forked structure, and the first clamping part and the second clamping part are provided with opposite electric conduction clamping surfaces.
The preferred technical scheme does, electrically conductive main part's first tip is provided with first clamping part and second clamping part, and second tip formula electricity connection end as an organic whole.
The preferred technical scheme does, first clamping part and second clamping part are provided with the first connecting through hole that link up each other respectively.
The preferred technical scheme does, first clamping part and/or second clamping part include the link, electrically conductive clamping face set up in the link, the link with be connected with flexible construction between the electrically conductive main part.
The preferable technical scheme is that the flexible structure of one of the first clamping part and the second clamping part is an arch structure far away from the other of the first clamping part and the second clamping part; or the flexible structures of the first clamping part and the second clamping part are both arch structures and the arch directions are opposite.
The preferred technical scheme is that an insulating sleeve is sleeved on the periphery of the flexible structure.
Preferably, the flexible structure is a laminated assembly of a plurality of metal foils.
Preferably, the second end is provided with a second connecting through hole.
The second objective of the present invention is to provide an electrical connection structure for battery cell charging and discharging tests, comprising:
the battery cell comprises a pole column, and the pole column is electrically connected with the conductive piece;
the charging and discharging test device comprises a charging and discharging test wire;
the electric connector is electrically connected with the conductive piece and the charge and discharge test line;
the conductive piece is clamped between the first clamping part and the second clamping part and is electrically connected with the conductive clamping surface.
The preferred technical scheme is that the conductive piece, the first clamping part and the second clamping part are connected through bolts and nuts.
The utility model has the advantages and beneficial effects that:
the first clamping part and the second clamping part form a clamping structure, so that current is led out from the conductive clamping surfaces of the first clamping part and the second clamping part, and compared with an integrated electric connector, the contact surface of the electric connector and the conductive piece is increased and the contact resistance is reduced on the basis of the same contact pressure;
when the electric connector is used for overcurrent charging and discharging, the increase of the contact area can accelerate the heat dissipation;
electric connector is little with the contact resistance of electrically conductive in the electric connection structure of electric core charge-discharge test, and heat transfer area increases, from deriving the heat and reducing the cooling of electrically conductive in two aspects of heat production.
Drawings
Fig. 1 is a schematic diagram of a battery cell charging and discharging test electrical connection structure in the prior art;
FIG. 2 is a schematic diagram of an electrical connector according to an embodiment;
FIG. 3 is a schematic structural view of another embodiment electrical connector;
FIG. 4 is a schematic view of an electrical connector according to another embodiment;
fig. 5 is a schematic diagram of an electrical connection structure for cell charge and discharge tests according to an embodiment;
in the figure: 1. an electrical connection; 11. a conductive body; 12. a first clamping portion; 13. a second clamping portion; 1a, a conductive clamping surface; 1b, a flexible structure; 1c, an insulating sleeve; 2. an electric core; 3. a conductive member; 4. and (6) charging and discharging a test wire.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
Optionally, one end of the conductive main body is provided with a first clamping portion and a second clamping portion of a bifurcated structure, or both ends of the conductive main body are provided with the first clamping portion and the second clamping portion; in addition, one end or both ends of the conductive main body can be provided with a plurality of groups of paired first clamping parts and second clamping parts. The arrangement of the bifurcating structure needs to be specifically determined according to the use requirement.
The structure of the integrated electric connection end is opposite to the forked structure, and the structure is a non-forked structure of the electric connection end.
The first connecting through hole is used for assembling a bolt; the first connecting holes of the first clamping part and the second clamping part are communicated with each other, so that the electric connection structure for connecting the first clamping part, the conductive piece and the second clamping part by the same bolt can be realized;
the flexible structure of the electric connector comprises the following three modes:
the first and the second clamping parts and the conductive main body of the electric connector are made of conductive materials such as copper and aluminum. Based on the overcurrent capacity requirement of large-current quick charge, the first clamping part and the second clamping part have certain thickness and rigidity. In order to ensure that the first clamping part and the second clamping part are fully contacted with the conductive parts between the first clamping part and the second clamping part for conduction, the width of a fork opening of the fork part needs to be determined according to the thickness of the conductive parts in the fork opening, and the production error of the fork opening needs to be accurately controlled;
one of the second, first and second clamping portions is made of conductive material such as copper, aluminum, etc. and has a certain thickness, and a flexible structure such as a metal thin layer aggregate including but not limited to a copper foil laminated aggregate is connected between the other connecting end and the conductive main body. The flexible structure has higher overcurrent capacity, and when the nut or other structures compress the superposed piece of the first clamping part, the conductive piece and the second clamping part, the connecting end of the clamping part with the flexible structure is adaptively turned over at a certain angle along with the jacking of the nut, and finally a connecting structure is formed, wherein the conductive clamping surface of the connecting structure is fully contacted with the surface of the conductive piece;
the flexible structures are connected between the connecting ends of the third clamping part and the second clamping part and the conductive main body, the connecting ends of the two clamping parts can be adaptively turned over at a certain angle along with the jacking pressure of the nut, the conductive clamping surface is fully contacted with the surface of the conductive piece, and the electric connecting piece of the structure can also be matched with the conductive pieces with different thicknesses to be clamped.
The flexible structure is arranged at the forked end of the first clamping part and/or the second clamping part connected with the conductive main body, or at a section arranged between the forked end and the connecting end. The flexibility of the flexible structure is relatively better than the connection end and/or the conductive body (including the second end connection end of the conductive body). The material of the electrical connection is specifically selected according to the use requirements.
The flexible structure is easy to cause self damage by rubbing and propping against the conductive piece. Such as breaking the metal foil layer, the arching structure avoids the above mentioned damage. Compare with the flexible construction of straight form, the connection through hole of first clamping part of convenient regulation alignment of the flexible construction of hunch-up and second clamping part to be convenient for finely tune the clamping face to fully laminate with electrically conductive piece.
Examples
As shown in fig. 2, in an embodiment, the electrical connector 1 includes a conductive body 11, a first clamping portion 12 and a second clamping portion 13 of a bifurcated structure are disposed at two ends of the conductive body 11, and the first clamping portion 12 and the second clamping portion 13 have opposite conductive clamping surfaces. The first clamping portion 12 and the second clamping portion 13 are metal sheets pre-pressed into fixed shapes, and the distance between the two clamping portions is equal to the thickness of the conductive member to be assembled, so that the first clamping portion 12 and the second clamping portion 13 are fully overlapped with the conductive member.
As shown in fig. 3, in another embodiment, the first clamping portion 12 and the second clamping portion 13 each include a connecting end, the conductive clamping surface 1a is disposed on the connecting end, a flexible structure 1b is connected between the connecting end and the conductive body 11, the flexible structure 1b is disposed on the bifurcated end of the first clamping portion 12 and the second clamping portion 13, and the flexible structures 1b of the first clamping portion 12 and the second clamping portion 13 are both of an arch structure and have opposite arch directions;
in another embodiment, as shown in fig. 4, the first clamping portion 12 is provided with a flexible structure 1b, the second clamping portion 13 is a metal sheet pre-pressed into a fixed shape, and the flexible structure 1b is provided between the diverging end and the connecting end of the second clamping portion 12, and is an arched structure far away from the first clamping portion 13.
The flexible structure 1b in the above embodiment is provided with an insulating sheath 1c around its outer periphery, and the flexible structure 1b is a laminated aggregate of a plurality of metal foils. Optionally, the connection end of the conductive main body, the first clamping portion and the second clamping portion is an integral sheet structure formed by laminating multiple layers of metal foils, and an integral connection structure of the metal foils and the connection end is maintained.
In another embodiment, as shown in fig. 2-4, in order to adapt the electrical connector 1 to be connected by bolts and nuts at both ends, the first clamping portion 12 and the second clamping portion 13 are respectively provided with a first connecting through hole penetrating through each other, and the second end portion is provided with a second connecting through hole. The first and second connecting through holes may be arranged individually or in combination according to the specific requirements of the electrical connector 1, for example, the second end is connected by soldering, and the second end may not be provided with the second connecting through hole. The stacked member of the first clamping portion 12, the conductive member, and the second clamping portion 13 is connected by a non-hole structure, or a first connecting through hole may not be provided. In the figure, the first clamping part 12, the second clamping part 13 and the conductive main body 11 are both sheet metal, and the opposite conductive clamping surfaces of the first clamping part 12 and the second clamping part 13 are configured to be parallel or approximately parallel.
As shown in fig. 2-4, in another embodiment, a first end of the conductive body 11 is provided with a first clamping portion 12 and a second clamping portion 13, and a second end is an integral electrical connection terminal.
As shown in fig. 5, in another embodiment, the electrical connection structure for cell charge and discharge test includes: the battery cell 2, the charge and discharge testing device and the electric connector 1 comprise a positive pole and a negative pole, wherein the positive pole and the negative pole are connected with the conductive piece 3 in a one-to-one correspondence manner (including but not limited to welding connection); the charge and discharge test device (not shown in the figure) comprises two charge and discharge test lines 4 which are respectively connected with the anode pole and the cathode pole of the electric core 2; the electric connector 1 is connected with the conductive piece 3 and the charge and discharge test wire 4; the conductive piece 3 is clamped between the first clamping part 12 and the second clamping part 13, and the conductive piece 3 is electrically connected with the conductive clamping surface 1 a; the conductive piece 3, the first clamping part 12 and the second clamping part 13 are connected through bolts and nuts, and gaskets are arranged between the cap part of the bolt and the first clamping part 12 and between the nut and the second clamping part 13, can increase the contact area, prevent looseness and protect screws.
Optionally, the electric connection structure for the charge and discharge test of the battery cell 2 is replaced by the electric connection member 1 in other embodiments, so that the temperature of the conductive member 3 in the fast charge test, especially the temperature of the connection position between the conductive member 3 and the electric connection member 1, can be reduced.
By adopting the electric core charging and discharging test electric connection structure of the electric connection piece, the temperature of the connection part of the electric conduction piece (aluminum bar) and the electric connection piece is reduced and changed. Based on first clamping part and the electric connector that second clamping part all has flexible construction, electric connector's material is copper, flexible construction is the range upon range of aggregate of multilayer copper foil, under the same test condition, when section electric current that fills soon is 386.4A, the temperature of the electrically conductive piece of electric core charge-discharge test electric connection structure and electric connector junction is 50 ~ 60 ℃ the highest (this temperature is measured through the thermocouple of connecting utmost point post welding department), bolt nut crimping department high temperature state and low temperature state difference in temperature are little, reduce the influence of contact resistance's change to electric core charge-discharge test precision.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (9)
1. An electric connector comprises an electric main body, and is characterized in that at least one end of the electric main body is provided with a first clamping part and a second clamping part of a forked structure, and the first clamping part and the second clamping part are provided with opposite electric clamping surfaces; the first end of the conductive main body is provided with a first clamping part and a second clamping part, and the second end of the conductive main body is an integrated electric connection end.
2. Electrical connection according to claim 1, characterized in that said first and second clamping portions are respectively provided with first connection through holes which pass through each other.
3. The electrical connector of claim 1, wherein the first and/or second clamping portion comprises a connection end, the conductive clamping surface being disposed at the connection end, and a flexible structure being connected between the connection end and the conductive body.
4. The electrical connector of claim 3, wherein the flexible structure of one of said first and second clamp portions is a bowed structure away from the other of said first and second clamp portions; or the flexible structures of the first clamping part and the second clamping part are both arch structures, and the arch directions are opposite.
5. Electrical connector according to claim 4, characterized in that the outer perimeter of said flexible structure is sheathed with an insulating sheath.
6. The electrical connector of claim 3, wherein said compliant structure is a laminated assembly of multiple layers of metal foil.
7. Electrical connection according to claim 1, characterized in that said second end is provided with a second connection through hole.
8. The utility model provides a battery cell charge-discharge test electrical connection structure which characterized in that includes:
the battery cell comprises a pole column, and the pole column is electrically connected with the conductive piece;
the charging and discharging test device comprises a charging and discharging test wire;
an electrical connector as claimed in any one of claims 1 to 7, electrically connecting said conductive member and said charge and discharge test line;
the conductive piece is clamped between the first clamping part and the second clamping part and is electrically connected with the conductive clamping surface.
9. The electrical connection structure for battery cell charging and discharging tests of claim 8, wherein the conductive member, the first clamping portion and the second clamping portion are connected by bolts and nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122967126.4U CN217035894U (en) | 2021-11-30 | 2021-11-30 | Electric connector and electric core charging and discharging test electric connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122967126.4U CN217035894U (en) | 2021-11-30 | 2021-11-30 | Electric connector and electric core charging and discharging test electric connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217035894U true CN217035894U (en) | 2022-07-22 |
Family
ID=82441622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122967126.4U Active CN217035894U (en) | 2021-11-30 | 2021-11-30 | Electric connector and electric core charging and discharging test electric connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217035894U (en) |
-
2021
- 2021-11-30 CN CN202122967126.4U patent/CN217035894U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5532278B2 (en) | Battery with multiple individual cells | |
| CN100588006C (en) | Battery module | |
| CN102376931B (en) | Rechargeable battery, battery module and electrode terminal assembly of rechargeable battery | |
| CN102668165B (en) | Device for electrically interconnecting cells in a battery pack by means of cell connectors and battery pack with such cell connectors | |
| US9865859B2 (en) | Stacked-type secondary battery | |
| US10096865B2 (en) | Secondary cell module | |
| CN113937411B (en) | Cylindrical battery module | |
| JP2009501412A (en) | Electrical connection terminals for power storage cells | |
| EP2636087A1 (en) | Battery assembly | |
| US10396326B2 (en) | Battery block | |
| CN101556995B (en) | Common-current collector plate group with positive plates opposite to negative plates and common-current collector module battery | |
| JP2011243426A (en) | Battery pack and battery pack connector | |
| CN104600236A (en) | Heavy-current lithium-ion battery pack | |
| KR101232783B1 (en) | secondary battery and manufacturing method thereof | |
| JP6044454B2 (en) | Power storage module | |
| CN217035894U (en) | Electric connector and electric core charging and discharging test electric connection structure | |
| US20100316893A1 (en) | Secondary battery including protection circuit module and method for manufacturing the same | |
| EP2772962B1 (en) | Rechargeable Battery | |
| KR20110107523A (en) | Method and structure for surface mount technology & secondary battery utilizing the same | |
| CN104979510B (en) | A kind of non-threaded pole Hard Roll lithium battery quickly connects energy-storage battery box | |
| WO2013037124A1 (en) | Conductive connection structure for cell of secondary battery | |
| KR101312428B1 (en) | Connecting structure for PCB and secondary battery utilizing the same | |
| KR20210050142A (en) | Busbar connector for increasing secondary battery stability and efficiency | |
| CN213124592U (en) | Lithium battery pack structure | |
| CN219350592U (en) | Battery cell assembly and single battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |