CN110726939A - Self-discharge contrast test equipment for lithium battery - Google Patents
Self-discharge contrast test equipment for lithium battery Download PDFInfo
- Publication number
- CN110726939A CN110726939A CN201910907296.8A CN201910907296A CN110726939A CN 110726939 A CN110726939 A CN 110726939A CN 201910907296 A CN201910907296 A CN 201910907296A CN 110726939 A CN110726939 A CN 110726939A
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- led display
- display screen
- charger
- lithium battery
- self
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
Abstract
The invention provides a self-discharge contrast test device for a lithium battery, which comprises an MH-C9000 charger, a data wire laying opening and a plastic buckle seat, wherein the MH-C9000 charger is connected with the data wire laying opening; the digital display value comparison device is provided with two groups of digital display value comparison devices, and each group of digital display value comparison devices is composed of one auxiliary LED display screen and one USB interface connected with the auxiliary LED display screen through a data line. According to the application file, whether fault judgment is performed in the self-discharge operation process of the lithium battery through two groups of digital display value comparison equipment can effectively guarantee the accuracy of the electric quantity value recorded in the self-discharge operation process of the lithium battery, and whether fault detection is performed on an LED display screen installed on an MH-C9000 charger, so that the application requirements of experimenters are met.
Description
Technical Field
The invention belongs to the technical field of lithium battery self-discharge detection, and particularly relates to self-discharge contrast test equipment for a lithium battery.
Background
With the aggravation of global energy shortage, new energy industry has invisibly emerged, and secondary battery technology with better application prospect is researched. Lithium ion batteries are widely used in various instruments and electric vehicles as energy systems due to their characteristics of no pollution, high specific energy, long cycle life, and the like. The self-discharge phenomenon of the lithium battery not only causes the energy loss of the battery, but also causes the service life of the lithium battery pack to be reduced due to the inconsistency of self-discharge among the batteries, the capacity is rapidly attenuated, a large error is caused in the prediction of the battery state of charge (SOC) by a Battery Management System (BMS), and the control strategy of the electric vehicle is invalid, so that the overdischarge condition of the battery system of the electric vehicle is caused. Therefore, the method has important significance for the rapid measurement of the self-discharge of the lithium battery.
When the lithium battery is detected to be self-discharged at present, a commonly used device is an MH-C9000 charger, and the operation steps of detecting the self-discharge of the lithium battery are carried out through the MH-C9000 charger: firstly detecting the initial electric quantity of the lithium battery, then carrying out a discharging program on the lithium battery after a specific time interval, and then detecting the final electric quantity of the current lithium battery; the first calculation method comprises the following steps: calculating according to the final electric quantity by taking the initial electric quantity as a basic calculation so as to obtain the self-discharge loss rate of the lithium battery; and a second calculation method comprises the following steps: and calculating the residual capacity by taking the capacity claimed by the battery specification as a basic capacity so as to obtain the self-discharge loss rate of the lithium battery.
However, when the lithium battery is detected to be subjected to self-discharge operation through the MH-C9000 charger, the accuracy of the detected electric quantity value of the lithium battery cannot be guaranteed, and the situation that the displayed numerical value is inaccurate occurs due to the fact that an LED display screen of the MH-C9000 charger is likely to be broken by a wire-wound resistor and the like in the long-time use process, so that the accuracy of the displayed numerical value on the LED display screen of the MH-C9000 charger cannot be guaranteed, the detected electric quantity value recorded in the detection process may be inaccurate, the self-discharge loss rate of the lithium battery is calculated to cause great deviation, and the unqualified lithium battery flows into the market.
Therefore, in view of the above, research and improvement are made for the existing structure and defects, and a self-discharge contrast test device for a lithium battery is provided, so as to achieve the purpose of higher practical value.
Disclosure of Invention
In order to solve the technical problems, the invention provides a self-discharge contrast test device for a lithium battery, which aims to solve the problem that the LED display screen of the existing MH-C9000 charger is possibly subjected to inaccurate display numerical values due to mildew and breakage of wire-wound resistance and the like in the long-time use process, so that the accuracy of the displayed numerical values on the LED display screen of the MH-C9000 charger cannot be ensured, the inaccurate detected electric quantity numerical values recorded in the detection process may be caused, the self-discharge loss rate of the lithium battery is calculated to generate large deviation, and the unqualified lithium battery flows into the market.
The invention relates to a purpose and an effect of self-discharge contrast test equipment for a lithium battery, which are achieved by the following specific technical means:
a self-discharge contrast test device for a lithium battery comprises an MH-C9000 charger, an LED display screen, a USB expansion interface, a digital display contrast device, an auxiliary LED display screen, a USB interface, an elastic limit belt, an auxiliary LED display screen rectangular accommodating groove, an arc-shaped notch, a USB interface rectangular accommodating groove, a data wire laying opening and a plastic buckle seat; the USB expansion interface is embedded in the right edge part of the top end face of the MH-C9000 charger and is connected with an internal circuit board of the MH-C9000 charger through a wire, and the connecting part of the wire is consistent with the connecting part of an LED display screen in the MH-C9000 charger and the internal circuit board, so that the USB expansion interface and the LED display screen in the MH-C9000 charger are in the same circuit; the digital display value comparison device is provided with two groups of digital display value comparison devices, and each group of digital display value comparison devices is composed of one auxiliary LED display screen and one USB interface connected with the auxiliary LED display screen through a data line.
Furthermore, two auxiliary LED display screen rectangular accommodating grooves are formed in the bottom end face of the MH-C9000 charger, and one USB interface rectangular accommodating groove is formed in the bottom end face of the MH-C9000 charger, and is adjacent to the upper side portions of the two auxiliary LED display screen rectangular accommodating grooves.
Furthermore, each auxiliary LED display screen rectangular accommodating groove is communicated with the USB interface rectangular accommodating groove adjacent to the upper side part of the auxiliary LED display screen rectangular accommodating groove through the data wire laying opening.
Furthermore, the two rectangular USB interface accommodating grooves are embedded with the plastic buckle seats.
Furthermore, the auxiliary LED display screens in the two sets of digital display value irradiation equipment are respectively accommodated in the auxiliary LED display screen rectangular accommodating grooves at two positions, and the sizes of the auxiliary LED display screen rectangular accommodating grooves are consistent with the whole size of the auxiliary LED display screen.
Furthermore, the USB interfaces of the two sets of digital display value comparison equipment are respectively contained in the two USB interface rectangular containing grooves, and the data line connected between the auxiliary LED display screen and the USB interface passes through the data line laying opening to be laid in the USB interface rectangular containing groove and is buckled with the plastic buckle seat in the USB interface rectangular containing groove.
Furthermore, the middle parts of the left side surface and the right side surface of the inner end of the rectangular accommodating groove of each auxiliary LED display screen are provided with the arc-shaped notches.
Furthermore, the bottom end face of the MH-C9000 charger is fixedly connected with one elastic limit belt relative to the upper side edge part and the lower side edge part of the rectangular accommodating groove of the two auxiliary LED display screens.
Compared with the prior art, the invention has the following beneficial effects:
according to the application file, whether fault judgment is performed in the self-discharge operation process of the lithium battery through two groups of digital display value comparison equipment can effectively guarantee the accuracy of the electric quantity value recorded in the self-discharge operation process of the lithium battery, and whether fault detection is performed on an LED display screen installed on an MH-C9000 charger, so that the application requirements of experimenters are met.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic top axial view of the MH-C9000 charger of the present invention.
Fig. 2 is a schematic diagram of the top elevation of the MH-C9000 charger of the present invention.
Fig. 3 is a schematic diagram of the bottom end axial view of the MH-C9000 charger of the present invention.
Fig. 4 is a schematic diagram of the bottom end elevation of the MH-C9000 charger of the present invention.
Fig. 5 is a schematic structural diagram of the numerical value comparison device in fig. 3 in a disassembled state.
FIG. 6 is a schematic structural diagram of the numerical value comparison apparatus shown in FIG. 4 in a disassembled state.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. MH-C9000 charger; 101. an LED display screen; 2. a USB expansion interface; 3. a digital display value contrast device; 301. an auxiliary LED display screen; 302. a USB interface; 4. tightening and loosening a limit belt; 5. the auxiliary LED display screen rectangular accommodating groove; 501. an arc-shaped notch; 6. a USB interface rectangular receiving groove; 7. laying an opening for a data line; 8. a plastic buckle seat.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in figures 1 to 6:
the invention provides a self-discharge contrast test device for a lithium battery, which comprises a MH-C9000 charger 1, an LED display screen 101, a USB expansion interface 2, a digital display contrast device 3, an auxiliary LED display screen 301, a USB interface 302, an elastic limit belt 4, an auxiliary LED display screen rectangular accommodating groove 5, an arc-shaped notch 501, a USB interface rectangular accommodating groove 6, a data wire laying opening 7 and a plastic buckle seat 8, wherein the digital display contrast device comprises a digital display LED display screen rectangular accommodating groove 3, a data wire laying opening 7 and a plastic buckle seat 8; the USB expansion interface 2 is embedded in the right edge part of the top end face of the MH-C9000 charger 1, the USB expansion interface 2 is connected with an internal circuit board of the MH-C9000 charger 1 through a wire, and the connecting part of the wire is consistent with the connecting part of the LED display screen 101 in the MH-C9000 charger 1 and the internal circuit board, so that the USB expansion interface 2 and the LED display screen 101 in the MH-C9000 charger 1 are in the same circuit; the digital display value comparison device 3 is provided with two groups, and each group of digital display value comparison device 3 is composed of one auxiliary LED display screen 301 and one USB interface 302 connected with the auxiliary LED display screen through a data line.
As shown in fig. 6, two auxiliary LED display screen rectangular receiving grooves 5 are formed on the bottom end surface of the MH-C9000 charger 1, and one USB interface rectangular receiving groove 6 is formed at a position on the bottom end surface of the MH-C9000 charger 1, which is adjacent to the two auxiliary LED display screen rectangular receiving grooves 5.
As shown in fig. 6, each of the auxiliary LED display rectangular receiving slots 5 is communicated with the USB interface rectangular receiving slot 6 adjacent to the upper side portion thereof through one of the data line laying openings 7.
As shown in fig. 6, two pieces of the plastic snap seats 8 are respectively embedded in the USB interface rectangular receiving slots 6, and the USB interface 302 is limited by the plastic snap seats 8, so that the USB interface rectangular receiving slots 6 are prevented from falling off, and messy inconvenience is avoided.
As shown in fig. 4, the auxiliary LED display screens 301 in the two sets of digital value comparison devices 3 are respectively accommodated in two auxiliary LED display screen rectangular accommodating grooves 5, and the size of the auxiliary LED display screen rectangular accommodating groove 5 is consistent with the overall size of the auxiliary LED display screen 301.
As shown in fig. 4, the USB interfaces 302 of the two sets of digital value comparison devices 3 are respectively accommodated in the two USB interface rectangular accommodating grooves 6, and the data lines connected between the auxiliary LED display 301 and the USB interfaces 302 are laid in the USB interface rectangular accommodating grooves 6 through the data line laying openings 7 and fastened to the plastic fastener seats 8 in the USB interface rectangular accommodating grooves 6, so that the USB interfaces 302 are restricted by the plastic fastener seats 8, and the USB interfaces 302 are prevented from falling out of the USB interface rectangular accommodating grooves 6, which causes disorder inconvenience.
As shown in fig. 6, the arc-shaped notch 501 is formed in the middle of each of the left and right sides of the inner end of the rectangular accommodating groove 5 for the auxiliary LED display screen, so that when the auxiliary LED display screen 301 is taken out, the auxiliary LED display screen 301 can be grasped and held by the two arc-shaped notches 501 to take out the auxiliary LED display screen 301 from the rectangular accommodating groove 5 for the auxiliary LED display screen.
As shown in fig. 6, the bottom end face of the MH-C9000 charger 1 is fixedly connected with one elastic limit belt 4 relative to the upper side edge part and the lower side edge part of the auxiliary LED display screen rectangular accommodating groove 5 at two positions, and the auxiliary LED display screen 301 accommodated in the auxiliary LED display screen rectangular accommodating groove 5 is further limited by the elastic limit belt 4 to prevent the auxiliary LED display screen from falling out of the auxiliary LED display screen rectangular accommodating groove 5 by itself.
The specific use mode and function of the embodiment are as follows:
the invention designs a self-discharge contrast test device, wherein a USB expansion interface 2 is embedded in the right side edge part of the top end surface of an MH-C9000 charger 1, the USB expansion interface 2 is connected with an internal circuit board of the MH-C9000 charger 1 through a wire, and the connecting part of the wire is consistent with the connecting part of an LED display screen 101 and the internal circuit board of the MH-C9000 charger 1, so that the USB expansion interface 2 and the LED display screen 101 in the MH-C9000 charger 1 are in the same circuit;
the operation steps of detecting self-discharge of the lithium battery through the MH-C9000 charger 1 are as follows: firstly detecting the initial electric quantity of the lithium battery, then carrying out a discharging program on the lithium battery after a specific time interval, and then detecting the final electric quantity of the current lithium battery; the first calculation method comprises the following steps: calculating according to the final electric quantity by taking the initial electric quantity as a basic calculation so as to obtain the self-discharge loss rate of the lithium battery; and a second calculation method comprises the following steps: calculating the residual electric quantity by taking the electric quantity claimed by the battery specification as a basic quantity to obtain the self-discharge loss rate of the lithium battery;
in order to ensure the accuracy of the initial electric quantity and the final electric quantity of the lithium battery, when detecting, an experimenter can grasp and pinch the digital display value comparison device 3 through two arc notches 501 to take a group of digital display value comparison devices 3 out of the auxiliary LED display screen rectangular accommodating groove 5, then insert the USB interface 302 in the group of digital display value comparison devices 3 into the USB expansion interface 2, because the USB expansion interface 2 is connected with the internal circuit board of the MH-C9000 charger 1 through a lead, and the connection part of the lead is consistent with the connection part of the LED display screen 101 and the internal circuit board in the MH-C9000 charger 1, the USB expansion interface 2 and the LED display screen 101 in the MH-C9000 charger 1 are in the same circuit, when detecting the initial electric quantity or the final electric quantity of the lithium battery, the auxiliary LED display screen 301 in the digital display value comparison device 3 displays the currently detected electric quantity, at this time, the experimenter can compare the numerical value displayed on the LED display screen 101 in the MH-C9000 charger 1 with the numerical value displayed on the auxiliary LED display screen 301 in the equipment 3, if the numerical values are consistent, the experimenter indicates that the LED display screen 101 has no fault and is in a normal state, and the displayed electric quantity numerical value can be recorded; if the values are not consistent, it represents that one of the LED display screen 101 or the auxiliary LED display screen 301 in the set of digital value comparison equipment 3 has a fault, at this time, the experimenter may take out another set of digital value comparison equipment 3 from another auxiliary LED display screen rectangular storage slot 5, then insert the USB interface 302 in the set of digital value comparison equipment 3 into the USB expansion interface 2, so that the experimenter may compare the electric quantity value displayed on the auxiliary LED display screen 301 in the set of digital value comparison equipment 3 to determine that one of the LED display screen 101 or the auxiliary LED display screen 301 in the other set of digital value comparison equipment 3 has a fault, when it is determined that there is no fault in the auxiliary LED display screen 301 in the other set of digital value comparison equipment 3, it represents that the LED display screen 101 has a fault, the electric quantity value displayed by the LED display screen 101 is recorded, at this time, the employee may record the electric quantity value displayed on the auxiliary LED display screen 301 in the digital value comparison equipment 3 first, after the electric quantity of the lithium battery is detected, the LED display screen 101 with the fault is replaced or maintained, and if the digital display value comparison equipment 3 is judged to have the fault through maintenance, the new digital display value comparison equipment 3 without the fault is replaced again;
this application file is through two groups of digital display value contrast equipment 3 and has had the fault to judge in the lithium cell self discharge operation in-process, can effectually guarantee to the accuracy of the electric quantity numerical value of lithium cell self discharge operation in-process record, and also can have the fault to the LED display screen 101 of installing on MH-C9000 charger 1 simultaneously and check, play the effect of one arrow double carving.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. The utility model provides a lithium cell is with contrast test equipment that discharges certainly which characterized in that: the self-discharge contrast test equipment for the lithium battery comprises an MH-C9000 charger, an LED display screen, a USB expansion interface, digital display contrast equipment, an auxiliary LED display screen, a USB interface, an elastic limit belt, an auxiliary LED display screen rectangular accommodating groove, an arc-shaped notch, a USB interface rectangular accommodating groove, a data wire laying opening and a plastic buckle seat; the USB expansion interface is embedded in the right edge part of the top end face of the MH-C9000 charger and is connected with an internal circuit board of the MH-C9000 charger through a wire, and the connecting part of the wire is consistent with the connecting part of an LED display screen in the MH-C9000 charger and the internal circuit board, so that the USB expansion interface and the LED display screen in the MH-C9000 charger are in the same circuit; the digital display value comparison device is provided with two groups of digital display value comparison devices, and each group of digital display value comparison devices is composed of one auxiliary LED display screen and one USB interface connected with the auxiliary LED display screen through a data line.
2. The self-discharge contrast test apparatus for a lithium battery as claimed in claim 1, wherein: the bottom end face of the MH-C9000 charger is provided with two auxiliary LED display screen rectangular accommodating grooves, and the bottom end face of the MH-C9000 charger is provided with one USB interface rectangular accommodating groove at the position adjacent to the upper side parts of the two auxiliary LED display screen rectangular accommodating grooves.
3. The self-discharge contrast test apparatus for a lithium battery as claimed in claim 1, wherein: each auxiliary LED display screen rectangular accommodating groove is communicated with the USB interface rectangular accommodating groove adjacent to the upper side part of the auxiliary LED display screen rectangular accommodating groove through one data wire laying opening.
4. The self-discharge contrast test apparatus for a lithium battery as claimed in claim 1, wherein: the two USB interface rectangular accommodating grooves are embedded with the plastic buckle seats.
5. The self-discharge contrast test apparatus for a lithium battery as claimed in claim 1, wherein: two sets of auxiliary type LED display screens in the digital display value irradiation equipment are respectively accommodated in two auxiliary type LED display screen rectangle accommodating grooves, and the size of the auxiliary type LED display screen rectangle accommodating grooves is consistent with the whole size of the auxiliary type LED display screens.
6. The self-discharge contrast test apparatus for a lithium battery as claimed in claim 1, wherein: the USB interfaces of the two sets of digital display value comparison equipment are respectively contained in the two USB interface rectangular containing grooves, and the data line connected between the auxiliary LED display screen and the USB interface penetrates through the data line laying opening to be laid in the USB interface rectangular containing groove and is buckled with the plastic buckle seat in the USB interface rectangular containing groove.
7. The self-discharge contrast test apparatus for a lithium battery as claimed in claim 1, wherein: the middle parts of the left side surface and the right side surface at the inner end of each auxiliary LED display screen rectangular accommodating groove are provided with the arc-shaped notches.
8. The self-discharge contrast test apparatus for a lithium battery as claimed in claim 1, wherein: the bottom end face of the MH-C9000 charger is fixedly connected with one elastic limiting belt relative to the upper side edge part and the lower side edge part of the rectangular accommodating groove of the two auxiliary LED display screens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910907296.8A CN110726939A (en) | 2019-09-24 | 2019-09-24 | Self-discharge contrast test equipment for lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910907296.8A CN110726939A (en) | 2019-09-24 | 2019-09-24 | Self-discharge contrast test equipment for lithium battery |
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| CN110726939A true CN110726939A (en) | 2020-01-24 |
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| CN201910907296.8A Withdrawn CN110726939A (en) | 2019-09-24 | 2019-09-24 | Self-discharge contrast test equipment for lithium battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112881923A (en) * | 2021-01-19 | 2021-06-01 | 东莞市皇育智能有限公司 | Detection equipment for detecting loss rate of PD quick charging battery |
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Application publication date: 20200124 |