CN220019721U

CN220019721U - Voltage and current testing device and system

Info

Publication number: CN220019721U
Application number: CN202320387539.1U
Authority: CN
Inventors: 邓招; 王博; 刘强; 张波
Original assignee: Yidao New Energy Technology Co ltd
Current assignee: Yidao New Energy Technology Co ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-11-14
Anticipated expiration: 2033-02-28

Abstract

The utility model provides a voltage and current testing device and a system, wherein the testing device comprises a mounting bracket and a testing probe; the test probes comprise at least 8 probe groups, two ends of each probe group are respectively connected with two opposite brackets of the mounting bracket, and at least 8 probe groups are arranged at intervals along the length direction of the brackets; each probe group corresponds to one main grid line of the battery to be tested and comprises a plurality of probes, and the probes are used for being in contact with the main grid lines so as to test the performance of the battery to be tested with at least 10 main grid lines. According to the utility model, the number of the probe groups is set to be at least 8, so that the performance of the battery to be tested with at least 10 main grid lines can be tested, the test stability can be ensured, the test yield can be improved, the use cost of the probe can be reduced, and the service life of the probe can be prolonged.

Description

Voltage and current testing device and system

Technical Field

The utility model relates to the technical field of photovoltaics, in particular to a voltage and current testing device and system.

Background

With the development of the photovoltaic cell industry, various large enterprises pay more attention to the quality of the battery, and a testing device is generally adopted to pre-test the voltage and the current of the battery, so that the quality standard of the battery is ensured.

However, the existing test device has higher cost, especially the use cost of the consumable spare part in the test device, namely the test probe, is higher.

Disclosure of Invention

In view of the above, the present utility model is directed to a voltage and current testing device and system for reducing the use cost of the testing probe.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a voltage and current testing device, the testing device comprising a mounting bracket and a test probe;

the test probes comprise at least 8 probe groups, two ends of each probe group are respectively connected with two opposite brackets of the mounting bracket, and at least 8 probe groups are arranged at intervals along the length direction of the brackets;

each probe group corresponds to one main grid line of the battery to be tested and comprises a plurality of probes, and the probes are used for being in contact with the main grid lines so as to test the performance of the battery to be tested with at least 10 main grid lines.

Further, the testing device is used for testing the performance of the battery to be tested with 10 main grid lines, and the testing probe comprises 8 probe groups;

wherein 6 third probe sets are uniformly arranged between the first probe set positioned at the head end and the second probe set positioned at the tail end at intervals;

wherein the spacing distance between the first probe set and the adjacent third probe set is twice the distance between the adjacent two third probe sets; the second probe set is spaced from an adjacent third probe set by a distance twice the distance between adjacent third probe sets.

Further, the mounting bracket comprises a pressing mechanism, and under the condition that the pressing mechanism is not in a pressing state, the distance between each probe set and the battery to be tested in the vertical direction is a preset distance, and the preset distance is 4-5mm.

Further, the pushing mechanism comprises a driving part and a transmission part, wherein the transmission part is connected with the bracket;

the driving part outputs driving force to the transmission part, the transmission part moves up and down under the driving of the driving force so as to drive the support to move up and down, and the probe set moves up and down under the driving of the support.

Further, each probe set comprises a threaded hole, a bolt or a screw matched with each threaded hole is arranged on the support, and the probe set is fixed on the mounting support through the bolt or the screw.

Further, the two ends of the probe set are provided with mounting end parts, the threaded holes are formed in the end parts, the bracket comprises clamping grooves corresponding to the mounting end parts, and the bolts or screws penetrate through the clamping groove walls and then are connected with the threaded holes extending into the clamping grooves.

The technical scheme of the utility model has at least the following advantages:

the utility model provides a voltage and current testing device, which comprises a mounting bracket and a testing probe; the test probes comprise at least 8 probe groups, two ends of each probe group are respectively connected with two opposite brackets of the mounting bracket, and at least 8 probe groups are arranged at intervals along the length direction of the brackets; each probe group corresponds to one main grid line of the battery to be tested and comprises a plurality of probes, and the probes are used for being in contact with the main grid lines so as to test the performance of the battery to be tested with at least 10 main grid lines. According to the utility model, the number of the probe groups is set to be at least 8, so that not only can the performance of the battery to be tested with at least 10 main grid lines be tested, but also the use cost of the probes can be reduced while the test stability is ensured.

Another objective of the present utility model is to provide a voltage and current testing system to reduce the cost of using the testing probe.

The technical scheme of the utility model is realized by the following steps:

a voltage and current testing system comprises a testing terminal and the testing device.

The advantages of the test system and the test device for the prior art are the same, and are not described in detail herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of a voltage and current testing apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of another voltage-current testing apparatus according to an embodiment of the utility model;

FIG. 3 is a schematic diagram of a test apparatus including 6 probe sets;

FIG. 4 is a schematic view of a bolt and screw according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of a mounting bracket according to an embodiment of the present utility model.

Reference numerals: 1. a mounting bracket; 101. a bracket; 102. a clamping groove; 2. a test probe; 201. a probe set; 2011. a first probe set; 2012. a second set of probes; 2013. a third set of probes; 2014. a fourth set of probes; 2015. and a fifth probe set.

Detailed Description

It should be noted that the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

In the related art, most of the test devices have high cost, especially, the test probes in the test devices are consumable parts, and the test probes need to be replaced periodically every month, so that the use cost of the test probes is generally high.

In view of this, the present utility model proposes a voltage and current testing apparatus, referring to fig. 1, fig. 1 shows a schematic structural diagram of a voltage and current testing apparatus according to an embodiment of the present utility model, and as shown in fig. 1, the testing apparatus includes a mounting bracket 1 and a test probe 2;

the test probe 2 comprises at least 8 probe groups 201, two ends of each probe group 201 are respectively connected with two opposite brackets (not shown in the figure) of the mounting bracket 1, and at least 8 probe groups 201 are arranged at intervals along the length direction of the brackets;

each of the probe groups 201 corresponds to one main grid line of the battery to be tested, and includes a plurality of probes (not shown in the figure) for contacting with the main grid lines to test the performance of the battery to be tested having at least 10 main grid lines.

In the present embodiment, the number of probe groups 201 is set to at least 8, and each probe group 201 corresponds to one main grid line of the battery to be tested. Wherein each probe set 201 includes a number of probes, the number of probes is generally set to be about 114 in order to ensure a test yield. Each probe is used for contacting the main grid line of the battery to be tested, so that the performance of the battery to be tested can be tested after the testing device is started. Illustratively, when the testing device of the present embodiment is started, the probes on the probe set 201 contact the main grid line of the battery to be tested, so as to rapidly and accurately test and collect the voltage and current of the battery to be tested, and output related data, according to which the electrical performance of the battery to be tested can be evaluated.

The testing device provided by the embodiment not only can be used for rapidly and accurately testing the performance of the battery to be tested, but also can be used for reducing the use cost of the probe, and particularly for the battery with 10 main grid lines commonly used in the photovoltaic industry at present.

In the following, taking a test device with 8 probe groups as an example, the test device provided in this embodiment can reduce the use cost of the probes for explanation:

assuming a total of 15 test lines, each probe set includes 114 probes, the cost of using a year of probes is:

regarding the prior art, for a battery having 10 main grid lines, most of test devices use 6 probe groups, each probe group comprises 208 probes, the unit price of each probe is 4 yuan, the service cycle of the probes is 30 days, and the replacement times of the probes in one year are 12 times, so that the use cost of the probes in one year of the prior test device is as follows:

(208×6) (number of single consumption of probe) 15×4×12= 898560 yuan

Regarding the test device provided in this embodiment, the test device includes 8 probe groups, each probe has a unit price of 7.3 yuan, and the service cycle of these probes is 45 days (in practical situations, the service cycle is greater than 45 days), and the number of replacement times of the probes is 8 in one year, so the test device provided in this embodiment has the following probe use cost in one year:

(114×8) (number of single consumption of probe) 15×7.3×8= 798912 yuan

The test device provided in this embodiment can save the probe use cost each year compared with the existing test device:

898560 (meta) -798912 (meta) = 99648 (meta)

Namely, the test device provided in this embodiment can save about 11% of the probe use cost compared with the existing test device.

In addition, since the probe needs to be replaced periodically, the testing device cannot work every time the probe is replaced, the testing device is stopped for at least 90 minutes every time the probe is replaced, and the testing device can test 63 batteries to be tested every minute, namely, the testing yield loss can be caused by stopping the probe every time. Compared with the existing test device comprising 6 probe sets, the test device provided in this embodiment can reduce test yield loss, and the specific calculation process is as follows:

assuming a total of 15 test lines, the existing test device comprising 6 probe sets is replaced 12 times a year, i.e. the number of down times is 12; the test device provided in this embodiment is replaced 8 times a year, i.e., the number of times of shutdown is 8.

Among them, the test yield for one year of loss with respect to the existing test apparatus including 6 probe sets is:

90×63×15×12= 1275750 tablets

The test yield for one year loss of the test device provided with this embodiment is:

90×63×15×8= 680400 tablets

The test device provided in this embodiment can reduce the test yield loss each year compared with the existing test device:

1275750-680400= 595350 tablets

That is, the test apparatus provided in this embodiment can reduce the test yield loss by about 47% compared with the conventional test apparatus.

According to the embodiment, at least 8 probe groups are arranged on the testing device, so that the performance of the battery to be tested with at least 10 main grid lines can be rapidly and accurately tested, the use cost of the probes can be reduced, the service life of the probes can be prolonged, and the testing yield loss can be reduced.

In an alternative implementation manner, referring to fig. 2, fig. 2 shows a schematic structural diagram of another voltage and current testing apparatus according to an embodiment of the present utility model, where the testing apparatus is used for testing performance of a battery to be tested having 10 main grid lines, and the test probe includes 8 probe groups as shown in fig. 2;

wherein 6 third probe groups 2013 are uniformly arranged at intervals between the first probe group 2011 at the head end and the second probe group 2012 at the tail end;

wherein the first probe 2011 is spaced from the adjacent third probe group 2013 by a distance twice as long as the distance between the adjacent two third probe groups 2013; the second probe set 2012 is spaced apart from the adjacent third probe set 2013 by twice the distance between the adjacent two third probe sets 2013.

At present, when the existing test device performs dynamic test, the error of the existing test device is about 0.05% and unstable, the arrangement mode of the probe groups is changed, the interval distance between the first probe group 2011 and the adjacent third probe group 2013 is set to be twice the distance between the two adjacent third probe groups 2013, and the interval distance between the second probe group 2012 and the adjacent third probe group 2013 is set to be twice the distance between the two adjacent third probe groups 2013, so that the stability of the test device can be better ensured, and meanwhile, the error of the dynamic test can be stabilized at 0.045% and even less than 0.045%, so that the test accuracy of the test device is further improved. In addition, the error can be stabilized at 0.03%, even less than 0.03%, for static testing.

In the embodiment, for a battery to be tested having 10 main grids, each probe set in this embodiment corresponds to one main grid of the battery to be tested. Wherein the first probe set 2011 corresponds to a first main grid line of the battery to be tested; the second probe set 2012 corresponds to a tenth main grid line, i.e., a last main grid line, of the battery to be tested; the remaining third probe sets 2013 correspond to the third, fourth, fifth, sixth, seventh, and eighth main grid lines of the battery to be tested, respectively. During actual testing, the probes of each probe group contact the corresponding main grid line, so that the performance of the battery to be tested is tested.

In addition, the test device provided in this embodiment may also test less than 10 main grid lines of the battery to be tested, for example, the battery to be tested having 9 main grid lines, and in order to ensure the test accuracy and stability of the test device when testing such a battery to be tested, the arrangement manner of the probe set may also be changed accordingly, which is not described herein.

For the conventional test device including 6 probe sets, referring to fig. 3, fig. 3 shows a schematic structural diagram of the test device including 6 probe sets, and as shown in fig. 3, a distance between two fourth probe sets 2014 located in the middle of the test device is half of a distance between two remaining adjacent fifth probe sets 2015, and is half of a distance between each fourth probe set 2014 and an adjacent fifth probe set 2015. Through verification test, under the arrangement mode, the existing test device comprising 6 probe groups can only reduce the error of dynamic test to 0.05%, and the error of static test to 0.03%, namely the test device provided by the embodiment is superior to the test device in test accuracy no matter dynamic test or static test, and meanwhile, the test device provided by the embodiment also has better stability.

In an alternative embodiment, referring to fig. 1, the mounting bracket 1 includes a pressing mechanism (not shown), and in the case that the pressing mechanism is not in a pressed state, a distance between each probe set 201 and the battery to be tested in a vertical direction is a preset distance, and the preset distance is 4-5mm.

The pressing state of the pressing mechanism means that after the testing device is started, the pressing mechanism drives the probe set 201 to move downwards, so that the probes on the probe set 201 contact the main grid line of the battery to be tested. After the belt test is completed, the pushing mechanism drives the probe set 201 to move upwards, so that the probe set 201 is restored to the position where the testing device was not started.

When the testing device is not started, in order to avoid that the probe set 201 always touches the main grid line of the battery to be tested for a long time, the abrasion of the probe set 201 is increased, and the service period is shortened; or when the testing device is just started, in order to avoid the damage to the probe set 201 caused by the shaking of the whole device to touch the main grid line of the battery to be tested due to the starting, the distance between the probe set 201 and the battery to be tested in the vertical direction is set to be 4-5mm, and the probe set 201 can be effectively protected within the distance range.

Correspondingly, when the pressing mechanism drives the probe group 201 to move downwards to contact the main grid line of the battery to be tested, the distance of the downward movement of the probe group 201 is 4-5mm, namely the pressing depth is 4-5mm. In this way, the probes on the probe set 201 can just contact the main grid line of the battery to be tested, and the stability of the test is maintained.

In an alternative embodiment, the pushing mechanism comprises a driving part and a transmission part, wherein the transmission part is connected with the bracket;

the driving part outputs driving force to the transmission part, the transmission part moves up and down under the driving of the driving force so as to drive the support to move up and down, and the probe set 201 moves up and down under the driving of the support.

The driving component can be a motor, and the motor outputs driving force to the transmission component after receiving the electric signal, so that the transmission component moves up and down.

In an alternative embodiment, each of the probe sets 201 includes a threaded hole, and the bracket includes a bolt or screw that is adapted to each of the threaded holes, and the probe set 201 is fixed to the mounting bracket by the bolt or screw.

In a specific implementation, since the testing device provided in this embodiment can test the performance of the battery to be tested with different numbers of main grid lines, in order to ensure the testing accuracy and stability of the testing device, the arrangement mode of the probe set 201 needs to be changed, and in order to facilitate the replacement of the probe set 201, the probe set 201 in this embodiment is fixed on the mounting bracket by bolts or screws.

The type of the bolt and the screw used refer to fig. 4, fig. 4 shows a schematic structural diagram of the bolt and the screw according to the embodiment of the present utility model, fig. 4 (a) shows a schematic structural diagram of the bolt, and fig. 4 (b) shows a schematic structural diagram of the screw. Other common bolt and screw types may be used in practice, and the utility model is not particularly limited.

In an alternative embodiment, the two ends of the probe set 201 have mounting ends, the threaded holes are disposed on the mounting ends, the bracket includes a clamping groove corresponding to each mounting end, and the bolt or screw passes through the clamping groove wall and then is connected with the threaded hole extending into the clamping groove.

In a specific implementation, in order to facilitate the fixing of the probe set 201 on the mounting bracket by bolts or screws, in this embodiment, mounting end portions are disposed at two ends of the probe set 201, and a clamping groove corresponding to each mounting end portion is disposed on the bracket.

Referring to fig. 5, fig. 5 shows a schematic structural diagram of a mounting bracket according to an embodiment of the present utility model, which is specifically applicable to a battery to be tested having 10 main grids, as shown in fig. 5, 10 clamping grooves 102 are provided on each bracket 101 of the mounting bracket, and each clamping groove 102 may correspond to a mounting end portion of a probe set 201.

In this embodiment, the number of the probe groups 201 is set to be at least 8, so that not only the performance of the battery to be tested with at least 10 main grid lines can be tested, but also the use cost of the probe is effectively reduced, the test yield is improved, and the service life of the probe is prolonged. In addition, by changing the arrangement mode of the probe group 201, the testing accuracy and stability of the testing device are also improved.

Based on the same inventive concept, the embodiment of the utility model also provides a voltage and current testing system, which comprises a testing terminal and the testing device.

The testing device tests and collects the voltage and the current of the battery to be tested through the testing probe, relevant data are output to the testing terminal, the testing terminal processes and analyzes the data, the analysis result is displayed, and meanwhile, a user can print the relevant analysis result according to the requirement.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the utility model.

It should also be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Moreover, relational terms such as "first" and "second" may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, or order, and without necessarily being construed as indicating or implying any relative importance. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or terminal device comprising the element.

The foregoing has outlined rather broadly the more detailed description of the utility model in order that the detailed description of the utility model that follows may be better understood, and in order that the present contribution to the art may be better appreciated. While various modifications of the embodiments and applications of the utility model will occur to those skilled in the art, it is not necessary and not intended to be exhaustive of all embodiments, and obvious modifications or variations of the utility model are within the scope of the utility model.

Claims

1. A voltage and current testing device, characterized in that the testing device comprises a mounting bracket and a testing probe;

2. The test device of claim 1, wherein the test device is used for testing the performance of a battery to be tested having 10 main grid lines, and the test probe comprises 8 probe groups;

wherein the spacing distance between the first probe set and the adjacent third probe set is twice the distance between the adjacent two third probe sets; the second probe set is spaced from the adjacent third probe set by a distance twice the distance between the adjacent two third probe sets.

3. The test device according to claim 1, wherein the mounting bracket includes a pressing mechanism, and in a case where the pressing mechanism is not in a pressed state, a distance between each of the probe groups and the battery to be tested in a vertical direction is a preset distance, and the preset distance is 4-6mm.

4. A testing device according to claim 3, wherein the depressing mechanism comprises a driving member and a transmission member, wherein the transmission member is connected to the support;

5. The test device of claim 1, wherein each of the probe sets includes a threaded hole, the bracket includes a bolt or screw thereon that mates with each of the threaded holes, and the probe set is secured to the mounting bracket by the bolt or screw.

6. The test device of claim 5, wherein the probe set has mounting ends at both ends, the threaded holes are provided at the mounting ends, the bracket includes a clamping groove corresponding to each of the mounting ends, and the bolts or screws pass through the clamping groove walls and are connected to the threaded holes extending into the clamping groove.

7. A voltage current testing system, characterized in that the testing system comprises a testing terminal and a testing device according to any of claims 1-6.