CN219435013U - High-voltage battery internal resistance testing device - Google Patents
High-voltage battery internal resistance testing device Download PDFInfo
- Publication number
- CN219435013U CN219435013U CN202123181969.8U CN202123181969U CN219435013U CN 219435013 U CN219435013 U CN 219435013U CN 202123181969 U CN202123181969 U CN 202123181969U CN 219435013 U CN219435013 U CN 219435013U
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- front panel
- internal resistance
- voltage battery
- rear panel
- testing device
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- 238000012360 testing method Methods 0.000 title claims abstract description 54
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 10
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 241000156302 Porcine hemagglutinating encephalomyelitis virus Species 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Measurement Of Resistance Or Impedance (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to the technical field of battery testing, and particularly discloses a high-voltage battery internal resistance testing device which comprises a detector body, a front panel, a rear panel, keys, a display screen and testing terminals, wherein the display screen is fixedly connected with the front panel and is positioned above the front panel, the number of the keys is multiple, the keys are respectively fixedly connected with the front panel and are respectively positioned above the front panel, the testing terminals are fixedly connected with the front panel and are positioned above the front panel, the testing terminals are positioned on the right side of the display screen, the front panel is arranged above the detector body, the rear panel is arranged below the detector body, and the front panel and the rear panel are mutually covered. The setting of above structure can carry out accurate measurement to high-voltage battery group, simultaneously through the demonstration of display screen can be more convenient observe the detection numerical value.
Description
Technical Field
The utility model relates to the technical field of battery testing, in particular to a high-voltage battery internal resistance testing device.
Background
Currently, lithium ion batteries are widely applied to various industrial fields, mainly used as power sources of portable electronic devices, and in recent years, the lithium ion batteries are expanded to a fixed storage battery system and an automobile power field, and the lithium ion batteries are required to be detected in order to ensure the quality of the batteries, wherein the lithium ion batteries comprise the need of detecting the internal resistance of the batteries.
In the prior art, when a battery on a common portable electronic device is measured, the battery can be tested by using a battery internal resistance meter lower than 60V.
However, when testing up to 1KV voltage battery packs such as EV and PHEV, precise test is required.
Disclosure of Invention
The utility model aims to provide a high-voltage battery internal resistance testing device, which aims to solve the technical problem that in the prior art, when a battery pack with voltage as high as 1KV, such as EV and PHEV, is tested, accurate testing is required.
In order to achieve the above purpose, the high-voltage battery internal resistance testing device comprises a detector body, a front panel, a rear panel, keys, a display screen and a testing terminal, wherein the display screen is fixedly connected with the front panel and is positioned above the front panel, the keys are respectively fixedly connected with the front panel and are respectively positioned above the front panel, the testing terminal is fixedly connected with the front panel and is positioned above the front panel, the testing terminal is positioned on the right side of the display screen, the front panel is arranged above the detector body, the rear panel is arranged below the detector body, and the front panel and the rear panel are mutually covered.
The high-voltage battery internal resistance testing device further comprises a fuse cover and a battery rear cover, the rear panel is provided with a first groove and a second groove, the fuse cover covers the first groove, and the battery rear cover covers the second groove.
The rear panel is further provided with a plurality of screw fixing holes, and the screw fixing holes are uniformly distributed on the surface of the rear panel.
The rear panel is further provided with an instrument nameplate label sticking groove, and the instrument nameplate label sticking groove is arranged above the battery rear cover.
The high-voltage battery internal resistance testing device further comprises a plurality of anti-skid foot pads, wherein the anti-skid foot pads are fixedly connected with the rear panel and are respectively located on one side of the rear panel.
According to the high-voltage battery internal resistance testing device, the battery is placed or connected to the testing terminal, the internal resistance of the battery is measured through the detector body, meanwhile, the keys are used for conducting operation of switching and detecting functions on the detector body, the front panel and the rear panel protect the detector body, meanwhile, the type of the display screen is AT043TN25 and is used for displaying the voltage and the internal resistance of the tested battery, the high-voltage isolation capacitor is arranged in the detector body and is used for isolating the signal source of the detector body from the high-voltage battery, the high-voltage battery can charge the capacitor instantly, an alternating current constant current source of 1kHz is injected into the high-voltage battery by adopting an alternating current four-terminal testing method, accurate measurement on the high-voltage battery is achieved, and meanwhile, the detection value can be observed more conveniently through display of the display screen.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a front panel structure of a high-voltage battery internal resistance testing device according to the present utility model.
Fig. 2 is a schematic view of the structure of a rear panel of the high-voltage battery internal resistance testing device according to the present utility model.
Fig. 3 is a schematic circuit diagram of the present utility model.
1-detector body, 2-front panel, 3-rear panel, 4-button, 5-display screen, 6-test terminal, 7-fuse lid, 8-battery back lid, 9-first recess, 10-second recess, 11-screw fixation hole, 12-instrument nameplate label paste groove, 13-anti-skidding callus on sole.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 to 3, the present utility model provides a high-voltage battery internal resistance testing device, which includes a detector body 1, a front panel 2, a rear panel 3, keys 4, a display 5 and a testing terminal 6, wherein the display 5 is fixedly connected with the front panel 2 and is located above the front panel 2, the number of the keys 4 is plural, the keys 4 are respectively fixedly connected with the front panel 2 and are respectively located above the front panel 2, the testing terminal 6 is fixedly connected with the front panel 2 and is located above the front panel 2, the testing terminal 6 is located on the right side of the display 5, the front panel 2 is arranged above the detector body 1, the rear panel 3 is arranged below the detector body 1, and the front panel 2 and the rear panel 3 are mutually covered.
In this embodiment, by placing or connecting a battery to the test terminal 6, measuring the internal resistance of the battery by the tester body 1, simultaneously the key 4 Is used for performing switching and detecting functions on the tester body 1, the front panel 2 and the rear panel 3 protect the tester body 1, meanwhile the display 5 Is AT043TN25, and Is used for displaying the voltage and internal resistance of the test battery, the high-voltage isolation capacitor Is installed inside the tester body 1 to isolate the signal SOURCE of the tester body 1 from the high-voltage battery, the high-voltage battery instantaneously charges the capacitor, an ac constant current SOURCE of 1kHz Is injected into the high-voltage battery by adopting an ac four-terminal test method, thereby realizing accurate measurement of the high-voltage battery, and the voltage drop vis generated by the impedance of the battery Is measured on the sensor terminal, AT this time, since the sensor terminal Is connected to an internal high-impedance voltmeter, the wire resistor and the contact resistor R1, the current flowing on the wire R2 and the wire R4 are almost eliminated, and the contact resistor R4 Is almost no longer than the contact resistor Is detected, and the contact resistor R4 Is basically eliminated; high-voltage isolation capacitor devices C1 and C2 are added into the detector body 1, the battery pack and the instrument are isolated in direct-current high voltage, and a large-current rapid protection tube D1 is used for limiting the charging current of the battery pack to the capacitor in the moment; the internal circuit of the detector body 1 is protected, the detector body 1 is prevented from being damaged under high voltage impact, direct-current high voltage at two ends of a battery pack is collected through a low-temperature high-precision voltage dividing resistor, U3 is an AD8656 which is an operational amplifier and has infinite high-impedance input characteristic, and the infinite input impedance has no influence on the voltage dividing resistor, so that the precision of test voltage can be greatly improved by adding a voltage follower behind the voltage dividing resistor, the voltage dividing resistor limits the input voltage to 0-2V to U6, wherein U6 is a multiplexing switch controlled by digital signals and has low on resistance and very low off leakage current, the direct-current high-voltage test is realized through the AD converter by the arrangement of the structure, the high-voltage battery pack can be accurately measured, and meanwhile, the detection value can be more conveniently observed through the display of the display screen 5;
the working principle of the utility model is as follows: the two ends of the battery pack to be tested are connected with the test ends for testing the internal resistance of the high-voltage battery, as shown in fig. 3, an alternating current constant current source of 1kHz is generated by a U1 operational amplifier to be injected into the battery pack, and the capacitor has the characteristic of alternating current blocking and direct current, so that the direct current voltage of the battery is isolated outside an instrument by using high-voltage blocking capacitors C1 and C2, but the capacitor is charged at the moment that the high-voltage battery contacts the test terminal 6, and the charging current is very large, so that the device is broken by preventing the test ends from being instantaneously contacted with the high-voltage battery pack, and the high-power impact resistance resistors R5 and R6 and a high-current quick protection tube D1 are used for limiting the charging current of the capacitor by the instantaneous battery pack, thereby playing the role of spark discharging prevention;
u2 is an operational amplifier, which is used for amplifying a small signal of a voltage drop generated by a constant current source at the impedance of the battery pack, taking out an effective signal into a Butterworth filter through the principle of synchronous detection, and performing voltage filtration on alternating current to form direct current voltage, and inputting the direct current voltage into a U6 analog switch, wherein the step detection is a detection mode used when a signal with the same phase component as a reference signal is taken out from a certain signal, the ARM processor controls the analog switch to switch into an AD converter, and the analog switch is converted into the voltage and the internal resistance of the battery pack through a calibration formula and displays detection values on the display screen 5;
compared with the traditional scheme, the utility model has the following characteristics: 1. high insulation isolation of the high-voltage battery internal resistance test is realized; 2. the precise test of the internal resistance of the high-voltage battery is realized; 3. reducing the occurrence of spark discharge of the test line contact battery pack.
Further, the high-voltage battery internal resistance testing device further comprises a fuse cover 7 and a battery rear cover 8, the rear panel 3 is provided with a first groove 9 and a second groove 10, the fuse cover 7 covers the first groove 9, and the battery rear cover 8 covers the second groove 10.
In this embodiment, the first groove 9 is used for placing a fuse, the fuse cover 7 covers the first groove 9 to fix the fuse, the second groove 10 is used for placing a battery for providing power for the detector body 1, and the battery rear cover 8 seals the battery.
Further, the rear panel 3 further has a plurality of screw fixing holes 11, and the plurality of screw fixing holes 11 are uniformly distributed on the surface of the rear panel 3.
In the present embodiment, the screw fixing holes 11 are provided to facilitate the connection and fixation of the front panel 2 and the rear panel 3.
Further, the rear panel 3 further has an instrument nameplate label attaching groove 12, and the instrument nameplate label attaching groove 12 is disposed above the battery rear cover 8.
In this embodiment, the setting of the instrument nameplate label sticking groove 12 facilitates the sticking of the instrument nameplate, and facilitates the user to observe the numerical value of the high-voltage battery internal resistance testing device.
Further, the high-voltage battery internal resistance testing device further comprises a plurality of anti-skid foot pads 13, wherein the anti-skid foot pads 13 are fixedly connected with the rear panel 3 and are located on one side of the rear panel 3.
In this embodiment, by the arrangement of the anti-slip foot pad 13, an effective anti-slip effect can be achieved when the high-voltage battery internal resistance testing device is placed on a table top.
The above disclosure is only a preferred embodiment of the present utility model, and it should be understood that the scope of the utility model is not limited thereto, and those skilled in the art will appreciate that all or part of the procedures described above can be performed according to the equivalent changes of the claims, and still fall within the scope of the present utility model.
Claims (5)
1. A high-voltage battery internal resistance testing device is characterized in that,
including detector body, front panel, rear panel, button, display screen and test terminal, the display screen with front panel fixed connection, and be located the top of front panel, the quantity of button is a plurality of, a plurality of the button respectively with front panel fixed connection, and be located respectively the top of front panel, test terminal with front panel fixed connection, and be located the top of front panel, just test terminal is located the right side of display screen, the front panel set up in the top of detector body, the rear panel set up in the below of detector body, just the front panel with the rear panel covers each other.
2. The high-voltage battery internal resistance testing device according to claim 1, wherein,
the high-voltage battery internal resistance testing device further comprises a fuse cover and a battery rear cover, the rear panel is provided with a first groove and a second groove, the fuse cover covers the first groove, and the battery rear cover covers the second groove.
3. A high-voltage battery internal resistance testing device according to claim 2, wherein,
the rear panel is further provided with a plurality of screw fixing holes, and the screw fixing holes are uniformly distributed on the surface of the rear panel.
4. A high-voltage battery internal resistance testing apparatus according to claim 3, wherein,
the rear panel is also provided with an instrument nameplate label sticking groove, and the instrument nameplate label sticking groove is arranged above the battery rear cover.
5. The high-voltage battery internal resistance testing device according to claim 4, wherein,
the high-voltage battery internal resistance testing device further comprises a plurality of anti-skid foot pads, wherein the anti-skid foot pads are fixedly connected with the rear panel respectively and located on one side of the rear panel respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123181969.8U CN219435013U (en) | 2021-12-17 | 2021-12-17 | High-voltage battery internal resistance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123181969.8U CN219435013U (en) | 2021-12-17 | 2021-12-17 | High-voltage battery internal resistance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219435013U true CN219435013U (en) | 2023-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123181969.8U Active CN219435013U (en) | 2021-12-17 | 2021-12-17 | High-voltage battery internal resistance testing device |
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| Country | Link |
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| CN (1) | CN219435013U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120142962A (en) * | 2025-05-16 | 2025-06-13 | 常州市和普电子科技有限公司 | A withstand voltage test device and method based on SPWM technology |
-
2021
- 2021-12-17 CN CN202123181969.8U patent/CN219435013U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120142962A (en) * | 2025-05-16 | 2025-06-13 | 常州市和普电子科技有限公司 | A withstand voltage test device and method based on SPWM technology |
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