CN214953994U

CN214953994U - 18650 cylindrical lithium ion cell uniformity detection device

Info

Publication number: CN214953994U
Application number: CN202121735032.8U
Authority: CN
Inventors: 赵万胜; 李国柱
Original assignee: Shenzhen Genju Technology Co ltd
Current assignee: Shenzhen Genju Technology Co ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2021-11-30
Anticipated expiration: 2031-07-28

Abstract

The utility model relates to the technical field of lithium ion battery cells, and discloses a 18650 cylindrical lithium ion battery cell consistency detection device, which comprises a test spring probe, a test cylinder, a test spring probe, a lifting cylinder, a testing instrument, a battery cell loading seat, a testing cylinder, a battery cell polarity testing device and a battery cell polarity testing device, wherein the battery cell to be tested is placed in a battery cell mounting groove on the battery cell loading seat, the lifting cylinder is started to enable the battery cell loading seat to be positioned in the middle of the test spring probe, the test spring probe is respectively driven by the test cylinder to be abutted against positive and negative pole pieces at two ends of the battery cell to realize electric conduction, the test spring probe is respectively electrically connected with the testing instrument, thereby realizing the test of the electric performance consistency of the battery cell, improving the electric performance consistency of the battery cells in the same series of lithium battery packs, simultaneously, avoiding the situation that the battery cells in the same series of lithium battery packs have the positions of battery cells which are arranged in a swinging way, leading to short circuit, causing the loss of safety and property, and improving the grouped safety performance of the lithium ion batteries, and the test efficiency is high, the operation is simple, the use is convenient, and the practicability is strong.

Description

18650 cylindrical lithium ion cell uniformity detection device

Technical Field

The utility model relates to a lithium ion cell technical field, in particular to 18650 cylindrical lithium ion cell uniformity detection device.

Background

18650 cylindrical lithium ion cell is a standard lithium ion cell model number of the lithium ion cell, which is set by sonoy corporation of japan, a nose ancestor of the lithium ion cell in the year for cost saving, where 18 denotes a diameter of 18mm, 65 denotes a length of 65mm, and 0 denotes a cylindrical cell. Because 18650 cylindrical lithium ion cell's production degree of automation is high, stability is better, and the replaceability is high for 18650 cylindrical lithium ion cell all has the unique advantage that does not have with the ethical ratio in modularization and the standardization level of system development, 18650 electric cell life-span theory is 1000 times for circulation charging, and the capacity of unit density is very big, and 18650 electric cell is very good at the stability performance of work, can reduce manufacturing cost effectively, practices thrift the labour.

18650 cylindrical lithium ion cells have the biggest defect at present that the single battery capacity of the cylindrical lithium ion cells is low, and is generally about 2-4 Ah, so that the number of the cylindrical lithium ion cells required by the whole electric vehicle is very large, and a plurality of 18650 cylindrical lithium ion cells need to be reliably connected into a power battery module. The number of the battery cores is more complex and the requirement on the consistency of the power battery is higher. In the field of electric vehicles and other multi-series-parallel connection, the use performance of the battery is affected by the inconsistency of the battery cells, and even some potential safety hazards are brought.

When the lithium ion battery cell is used singly or in series-parallel connection in small scale, the safety problem can be basically controlled, but when the lithium ion battery cell is used in groups in large scale, especially as a power battery of an electric automobile, the safety problem is more prominent, when the lithium ion battery cell is used in groups, because the number of the monomers is large, the structure is complex, the problems of screening and matching the consistency of the monomers of the battery cell and managing the consistency are more difficult, and the battery cell is easy to over age due to the short plate in the battery pack, thereby being easier to cause safety accidents in the using process.

Therefore, in order to solve the safety problem of the lithium ion battery pack, it is necessary and urgent to enhance the safety technology of the lithium ion battery pack from the viewpoint of the battery pack system while improving the safety of the battery cell. The sources of the inconsistencies are many, the materials that make up the cells are not themselves completely consistent, and the process of making the cells is not controlled to the extent that each cell is identical in any detail. This may lead to inconsistent cell capacity, inconsistent terminal voltage, inconsistent internal resistance, inconsistent life, etc. It is difficult to solve the problem fundamentally. Therefore, it is necessary to detect and screen the electrical performance of the cells before grouping the lithium batteries.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a 18650 cylindrical lithium ion battery cell uniformity detection device, aim at that the lithium cell detects and screens the electric property of electric core before in groups, ensure that the electric property and the polarity of the interior electric core of lithium cell group are unanimous, improve the unitized security performance of lithium ion battery, avoid appearing the situation that has electric core pendulum anti-position in the same cluster lithium cell group, lead to the short circuit to take place, cause the loss of safety and property.

In order to achieve the above object, the 18650 cylindrical lithium ion cell consistency detection device provided by the present invention comprises a frame, a bottom plate, a side plate, a lifting cylinder, a lifting plate, a testing cylinder, a probe plate, a testing spring probe, a support plate and a cell loading seat, wherein the bottom plate is detachably fixed on the upper end portion of the frame by bolts, the side plate is vertically and parallelly arranged on both sides of the bottom plate, the lifting cylinder is vertically arranged on the bottom plate, the lifting plate is arranged above the bottom plate in a vertically sliding manner, a cylinder rod of the lifting cylinder is fixedly connected with the lifting plate, the testing cylinder is respectively and horizontally arranged at both ends of the upper end wall of the lifting plate, the probe plate is respectively arranged above the lifting plate in a horizontally sliding manner, and the probe plate is respectively and fixedly connected with the cylinder rod of the testing cylinder, the test spring probes are respectively and oppositely arranged on the front end wall of the probe board, two ends of the supporting board are respectively fixedly connected with the upper end wall of the side board in a detachable mode through screws, the electric core loading seat is detachably fixed on the upper end wall of the supporting board, a plurality of electric core mounting grooves extending in the length direction are concavely arranged on the upper end wall of the electric core loading seat at intervals, the test spring probes can be respectively electrically connected with the positive and negative pole pieces at two end portions of an electric core to be tested in an abutting mode, and the test spring probes are respectively electrically connected with a test instrument.

Further, the support plate comprises limiting plates, wherein the limiting plates are detachably fixed on the upper end walls of the side plates through screws respectively, and the two end walls of the support plate are abutted to the inner side walls of the limiting plates respectively.

Furthermore, the upper end wall of the supporting plate is concavely provided with a limiting groove matched with the battery cell loading seat, the battery cell loading seat is detachably embedded in the limiting groove, and two end walls of the battery cell loading seat are respectively abutted to two end walls of the limiting groove.

Further, still include fastening screw, the upper end wall of electricity core loading seat is recessed to be equipped with one along the recess of length side extension, the both ends of the bottom of recess are recessed respectively and are equipped with a screw hole, fastening screw wear to locate respectively the screw hole to revolve in on the upper end wall of backup pad.

Furthermore, the probe card also comprises protective covers which are respectively covered on the upper end parts of the probe card.

Further, still include the reinforcing plate, the lower terminal wall of reinforcing plate respectively with bottom plate fixed connection, just the lateral wall of reinforcing plate respectively with the inside wall butt setting at the both ends of curb plate.

Furthermore, the lifting foot cup is further included and is vertically arranged on four bottom corners of the lower end wall of the rack.

Further, the battery cell loading seat is made of an insulating plastic material.

Adopt the technical scheme of the utility model, following beneficial effect has: the technical scheme of the utility model is that a cylindrical lithium ion battery cell to be tested is placed in a cell mounting groove on a cell loading seat, a lifting cylinder is started to enable the cell loading seat to be positioned in the middle of a testing spring probe, the testing cylinder is started, the testing spring probe is respectively driven by the testing cylinder to be close to the cylindrical lithium ion battery cell to be tested until the testing spring probe is respectively butted with positive and negative pole pieces at two ends of the tested cylindrical lithium ion battery cell to realize electric conduction, the testing spring probe is respectively electrically connected with a testing instrument, thereby realizing the testing and screening of the electric performance consistency of the battery cell, improving the electric performance consistency of the battery cell in the same series of lithium battery packs, simultaneously testing the polarity of the battery cell, avoiding the situation that the battery cell in the same series of lithium battery packs has an inverted position, causing short circuit and causing the loss of safety and property, the safety performance of the lithium ion battery in groups is improved, a plurality of monomer battery cores can be tested at one time, the testing efficiency is high, the operation is simple, the use is convenient, and the practicability is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a 18650 cylindrical lithium ion cell consistency detection apparatus provided by the present invention;

fig. 2 is a schematic view of a part of a 18650 cylindrical lithium ion cell consistency detection apparatus provided by the present invention;

fig. 3 is a schematic diagram of a partial exploded structure of a 18650 cylindrical lithium ion battery cell consistency detection apparatus according to the present invention.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a 18650 cylindrical lithium ion cell uniformity detection device.

As shown in fig. 1 to 3, in an embodiment of the present invention, the 18650 cylindrical lithium ion battery cell consistency detection apparatus includes a frame 101, a bottom plate 102, a side plate 103, a lifting cylinder 104, a lifting plate 105, a testing cylinder 106, a probe plate 107, a testing spring probe 108, a support plate 109, and a battery cell loading seat 110, wherein the bottom plate 102 is detachably fixed to an upper end portion of the frame 101 by bolts, the side plate 103 is vertically disposed on two sides of the bottom plate 102 in parallel, the lifting cylinder 104 is vertically disposed on the bottom plate 102, the lifting plate 105 is slidably disposed above the bottom plate 102 up and down, a cylinder rod of the lifting cylinder 104 is fixedly connected to the lifting plate 105, the testing cylinder 106 is respectively horizontally disposed at two ends of an upper end wall of the lifting plate 105, the probe plate 107 is respectively slidably disposed above the lifting plate 105 left and right, the probe plate 107 is respectively and fixedly connected with a cylinder rod of the testing cylinder 106, the testing spring probes 108 are respectively and oppositely arranged on the front end wall of the probe plate 107, two ends of the supporting plate 109 are respectively and fixedly connected with the upper end wall of the side plate 103 in a detachable manner, the cell loading seat 110 is detachably fixed on the upper end wall of the supporting plate 109, a plurality of cell mounting grooves 1101 extending along the length direction are concavely arranged on the upper end wall of the cell loading seat 110 at intervals, the testing spring probes 108 can be respectively and electrically connected with the positive and negative pole pieces at two end parts of the cell 200 to be tested in an abutting manner, and the testing spring probes 108 are respectively and electrically connected with a testing instrument.

Specifically, the support plate further comprises limiting plates 111, the limiting plates 111 are detachably fixed on the upper end walls of the side plates 103 through screws, and the two end walls of the support plate 109 are abutted to the inner side walls of the limiting plates 111.

Specifically, the upper end wall of the supporting plate 109 is concavely provided with a limiting groove 1091 adapted to the battery cell loading base 110, the battery cell loading base 110 is detachably embedded in the limiting groove 1091, and two end walls of the battery cell loading base 100 are respectively abutted to two end walls of the limiting groove 1091.

Specifically, the battery cell loading seat further comprises a fastening screw 112, a groove 1102 extending along the length direction is concavely formed in the upper end wall of the battery cell loading seat 110, a screw hole 1103 is concavely formed in each of two ends of the bottom of the groove 1102, and the fastening screw 112 is respectively inserted into the screw hole 1103 and screwed on the upper end wall of the supporting plate 109.

Specifically, the probe card further comprises protective covers 113, and the protective covers 113 are respectively covered on the upper end portions of the probe cards 107.

Specifically, the side plate assembly further comprises a reinforcing plate 114, the lower end walls of the reinforcing plate 114 are respectively and fixedly connected with the bottom plate 102, and the side walls of the reinforcing plate 114 are respectively abutted to the inner side walls at the two ends of the side plate 103.

Specifically, the lifting foot cup 115 is further included, and the lifting foot cup 115 is vertically arranged on four bottom corners of the lower end wall of the rack 101.

Specifically, the battery cell loading seat 110 is made of an insulating plastic material.

Specifically, the utility model discloses a cylindrical lithium ion cell that will await measuring is put into the electric core mounting groove on the electric core loading seat, start the lift cylinder, make the electric core loading seat be located the middle of the test spring probe, start the test cylinder, through the test cylinder drive the test spring probe respectively and be close to the cylindrical lithium ion cell that awaits measuring, until the test spring probe respectively with the cylindrical lithium ion cell's of test both ends positive and negative pole piece butt realize the electrical conductivity, through test spring probe respectively with test instrument electricity connection, thereby realize testing and screening the electric performance uniformity of electric core, improve the electric performance uniformity of the electric core in the same cluster of lithium cell group, test electric core polarity simultaneously, avoid having the situation that the electric core swings the reverse position in the same cluster of lithium cell group, lead to the short circuit to take place, cause the loss of safety and property, the safety performance of the lithium ion battery in groups is improved, a plurality of monomer battery cores can be tested at one time, the testing efficiency is high, the operation is simple, the use is convenient, and the practicability is high.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A18650 cylindrical lithium ion cell consistency detection device is characterized by comprising a rack, a bottom plate, side plates, a lifting cylinder, a lifting plate, a test cylinder, a probe plate, test spring probes, a supporting plate and a cell loading seat, wherein the bottom plate is detachably fixed at the upper end part of the rack through bolts, the side plates are vertically arranged on two sides of the bottom plate in parallel, the lifting cylinder is vertically arranged on the bottom plate, the lifting plate is arranged above the bottom plate in a vertically sliding manner, a cylinder rod of the lifting cylinder is fixedly connected with the lifting plate, the test cylinder is respectively horizontally arranged at two ends of the upper end wall of the lifting plate, the probe plates are respectively arranged above the lifting plate in a horizontally sliding manner, the probe plates are respectively fixedly connected with the cylinder rods of the test cylinder, the test spring probes are respectively oppositely arranged on the front end wall of the probe plates, the both ends of backup pad respectively through the screw with the upper end wall of curb plate can dismantle fixed connection, electricity core load seat detachable is fixed in on the upper end wall of backup pad, the upper end wall interval ground of electricity core load seat is equipped with a plurality of electric core mounting grooves that extend along length direction concavely, just test spring probe can be connected with the positive and negative pole piece butt electricity at the both ends of examination electric core that awaits measuring respectively, test spring probe is connected with the test instrument electricity respectively.

2. The 18650 cylindrical lithium ion cell uniformity detection device of claim 1, further comprising limit plates, wherein the limit plates are detachably fixed on the upper end walls of the side plates respectively through screws, and two end walls of the support plate are respectively abutted against the inner side walls of the limit plates.

3. The 18650 cylindrical lithium ion battery cell consistency detection device of claim 1, wherein a limiting groove matched with the cell loading seat is concavely arranged on an upper end wall of the support plate, the cell loading seat is detachably embedded in the limiting groove, and two end walls of the cell loading seat are respectively abutted against two end walls of the limiting groove.

4. The 18650 cylindrical lithium ion battery cell consistency detection device of claim 1, further comprising a fastening screw, wherein a groove extending along a length direction is concavely formed in an upper end wall of the battery cell loading seat, a screw hole is concavely formed in each of two ends of a bottom of the groove, and the fastening screw is respectively inserted into the screw hole and screwed on the upper end wall of the supporting plate.

5. The 18650 cylindrical lithium ion cell uniformity detection device of claim 1, further comprising protective covers respectively covering the upper ends of the probe cards.

6. The 18650 cylindrical lithium ion battery cell consistency detection device of claim 1, further comprising reinforcing plates, wherein lower end walls of the reinforcing plates are respectively and fixedly connected with the bottom plate, and side walls of the reinforcing plates are respectively arranged in abutment with inner side walls at two ends of the side plates.

7. The 18650 cylindrical lithium ion battery cell consistency detection device of claim 1, further comprising lifting goblets vertically disposed on four bottom corners of a lower end wall of the rack, respectively.

8. The 18650 cylindrical lithium ion battery cell consistency detection device of claim 1, wherein the cell loading nest is formed of an insulating plastic material.