CN114142582A - Be applicable to multichannel DC power supply parallel arrangement - Google Patents
Be applicable to multichannel DC power supply parallel arrangement Download PDFInfo
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- CN114142582A CN114142582A CN202111198371.1A CN202111198371A CN114142582A CN 114142582 A CN114142582 A CN 114142582A CN 202111198371 A CN202111198371 A CN 202111198371A CN 114142582 A CN114142582 A CN 114142582A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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Abstract
The invention discloses a parallel device suitable for a multi-channel direct-current power supply, which comprises a plurality of test channels and a parallel device; each test channel comprises a direct current power supply; the parallel device comprises a plurality of converters, a plurality of double-pole double-throw switches and two contactors; the double-pole double-throw switch comprises a positive input pin, a negative input pin, a multi-channel positive output pin, a multi-channel negative output pin, a single-channel positive output pin and a single-channel negative output pin; positive and negative leads of the direct-current power supply are respectively connected with the positive wiring column and the negative wiring column; the positive wiring column is electrically connected to the positive input pin, and the negative wiring column is electrically connected to the negative input pin; the multi-channel positive output pin is electrically connected with the input end of one of the contactors; the multi-channel negative output pin is electrically connected with the input end of the other contactor; the parallel device can realize industrial mass production, has strong universality and simple and convenient operation, greatly reduces the complexity of the parallel operation of the traditional multi-channel direct-current power supply, and saves a large amount of manual wiring time.
Description
Technical Field
The invention relates to the field of lithium battery testing, in particular to a multi-channel direct-current power supply parallel device.
Background
Because the single batteries are low in voltage and small in capacity, a battery pack in an electric automobile or an energy storage system is usually formed by combining a large number of single batteries in a series-parallel connection mode to form a module, and the module is formed into a battery pack in a series-parallel connection mode. Because the series and parallel combination modes of the battery modules or the battery packs are different, the total voltage and the allowed current are different. When high-rate charge and discharge are carried out, the situation that the current intensity of a test channel cannot meet the requirement is easy to occur. When the phenomenon occurs in the current laboratory test, the high-current output is usually realized by connecting different test channels in a test cabinet in parallel.
When high-rate charge and discharge are needed, the method in the prior art is to select the test channels to be connected in parallel according to the required current, then manually connect the positive and negative leads in each test channel to be connected in parallel to a bolt, and then connect the positive and negative leads to the positive and negative electrodes of the battery pack to be charged and discharged at high rate. If different battery packs need to be charged and discharged at high multiplying power, the testing channels need to be selected again for parallel connection after the lead wires which are connected in parallel are disassembled.
The method in the prior art is time-consuming and labor-consuming, and when different battery packs need to be tested, the battery packs need to be disassembled and then assembled, so that industrial flow production is inconvenient to realize. And when a plurality of test channels are manually connected in parallel, the test channels are difficult to operate and connect on one bolt, the wiring mode can generate larger wiring resistance, and when a current path is formed, the heat generation amount is larger, so that great influence is caused.
Disclosure of Invention
In order to solve the problem that the parallel connection of multi-channel power supplies wastes time and labor during the test of lithium batteries, the invention provides a parallel connection device suitable for the multi-channel direct-current power supplies, and the specific scheme is as follows:
a parallel device suitable for a multi-channel direct-current power supply comprises a plurality of test channels arranged in a test cabinet and a parallel device; each test channel comprises a direct current power supply for providing input current; the parallel device comprises a plurality of converters, a plurality of double-pole double-throw switches and two contactors; wherein one of the dc power supplies corresponds to one of the converters, and one of the converters corresponds to one of the double-pole double-throw switches; the converter comprises a shell, a positive wiring column and a negative wiring column which are fixed in the shell, fixing nuts screwed on the positive wiring column and the negative wiring column, and a cover plate which covers the shell tightly; the double-pole double-throw switch comprises two input pins which are respectively a positive input pin and a negative input pin, and also comprises four output pins which are respectively a multi-channel positive output pin, a multi-channel negative output pin, a single-channel positive output pin and a single-channel negative output pin; each contactor comprises a plurality of input ends and an output end; a positive lead and a negative lead of the direct current power supply are respectively connected to the positive wiring column and the negative wiring column and are used as input ends of the parallel device; the positive wiring column is electrically connected to the positive input pin, and the negative wiring column is electrically connected to the negative input pin; the multi-channel positive output pin is electrically connected to one input end of one contactor; the multi-channel negative output pin is electrically connected to one input end of the other contactor; the single-channel positive output pin and the single-channel negative output pin are respectively electrically connected with an electric wire with a wired nose at the tail end and serve as positive and negative 2 single-channel output ends; when the single-channel direct-current power supply can meet the charge and discharge requirements, the single-channel output end is respectively and electrically connected to the positive electrode and the negative electrode of a battery pack which needs high-rate charge and discharge; when two or more than two channels are connected in parallel to meet the charging and discharging requirements, the output ends of the two contactors are respectively and electrically connected to the positive electrode and the negative electrode of a battery pack which needs high-rate charging and discharging.
Preferably, the number of the converters is greater than or equal to the number of the test channels.
Preferably, the overcurrent capacity of the wire harness at the output end of the contactor is greater than the sum of the overcurrent capacities of all the wire harnesses at the input end.
Preferably, the cable ends of the positive lead and the negative lead of the direct current power supply are in a wire nose structure.
Preferably, the housing and the cover plate of the converter are made of insulating materials.
The invention has the beneficial effects that:
the parallel device can realize industrial batch production, avoids various uncertainties such as poor contact or excessive heat generation and the like generated in the manual wiring process, and the operator only needs to sleeve the wire noses at the tail ends of the positive and negative lead wires of the direct-current power supply on the positive and negative binding posts of the converter respectively, screw down the fixing nuts and cover the cover plate to complete wiring work. When the single-channel current just can satisfy the demand, directly connect the single-channel output on this passageway at the positive and negative two poles of a battery package, the rethread switches over double-pole double-throw switch to the single-channel end can. When multiple channels are required to be connected in parallel, two output ends of the contactor are connected to the positive pole and the negative pole of the battery pack respectively, an operator selects a proper test channel according to the required current, and then the double-pole double-throw switch on the channel is switched to the output end of the multiple channels. The single-channel or multi-channel parallel output is effectively realized. The device has strong universality and simple and convenient operation, greatly reduces the complexity of the parallel operation of the traditional multi-channel direct-current power supply, and saves a large amount of manual wiring time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a circuit diagram of a parallel arrangement of the present invention;
fig. 2 is a schematic cross-sectional view of a transducer according to the present invention.
The reference numbers are as follows: 1. the multi-channel single-pole contactor comprises an adapter, 101, a shell, 102, a positive terminal, 103, a negative terminal, 104, a fixing nut, 105, a cover plate, 2, a double-pole double-throw switch, 201, a positive input pin, 202, a negative input pin, 203, a multi-channel positive output pin, 204, a multi-channel negative output pin, 205, a single-channel positive output pin, 206, a single-channel positive output pin, 3 and a contactor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 2, the invention discloses a parallel device for multi-channel dc power supply, comprising a plurality of test channels disposed in a test cabinet and a parallel device. Each test channel includes a dc power supply for providing an input current.
The parallel device comprises a plurality of converters 1, a plurality of double-pole double-throw switches 2 and two contactors 3; one dc power supply corresponds to one converter 1, and one converter 1 corresponds to one double-pole double-throw switch 2.
The converter 1 comprises a shell 101, a positive terminal post 102 and a negative terminal post 103 which are fixed in the shell 101, a fixing nut 104 which is screwed on the positive terminal post 102 and the negative terminal post 103, and a cover plate 105 which is tightly covered on the shell 101; the double-pole double-throw switch 2 comprises two input pins which are respectively a positive input pin 201 and a negative input pin 202, and four output pins which are respectively a multi-channel positive output pin 203, a multi-channel negative output pin 204, a single-channel positive output pin 205 and a single-channel negative output pin 206; each contactor 3 comprises a number of inputs and an output.
A positive lead and a negative lead of the direct current power supply are respectively connected to the positive binding post 102 and the negative binding post 103 and are used as input ends of the parallel device; the positive terminal stud 102 is electrically connected to the positive input pin 201, and the negative terminal stud 103 is electrically connected to the negative input pin 202; the multi-channel positive output pin 203 is electrically connected to one input terminal of one of the contactors 3; the multi-channel negative output pin 204 is electrically connected to one input of another contactor 3.
The single-channel positive output pin 205 and the single-channel negative output pin 206 are respectively electrically connected with an electric wire with a wired nose at the tail end and serve as positive and negative 2 single-channel output ends; when the single-channel direct-current power supply can meet the charge and discharge requirements, the single-channel output end is respectively and electrically connected to the positive electrode and the negative electrode of the battery pack which needs high-rate charge and discharge; when two or more than two channels are connected in parallel to meet the charging and discharging requirements, the output ends of the two contactors 3 are respectively and electrically connected to the positive electrode and the negative electrode of the battery pack which needs high-rate charging and discharging.
The number of converters 1 is greater than or equal to the number of test channels. The overcurrent capacity of the wire harness at the output end of the contactor 3 is larger than the sum of the overcurrent capacities of all the wire harnesses at the input end thereof. The tail ends of the cables of the positive lead and the negative lead of the direct-current power supply are in wire nose structures. The case 101 and the cover plate 105 of the converter 1 are made of an insulating material. The safety of operators is guaranteed by the arrangement.
The wiring process is as follows: and respectively sleeving the positive lead and the negative lead of the direct current power supplies on all the test channels on the corresponding positive wiring column 102 and the corresponding negative wiring column 103 of the converter 1 through wire noses, wherein one direct current power supply corresponds to one converter 1. After the wiring harness is connected, the cover plate 105 is covered on the housing 101.
The first embodiment is as follows: when the current intensity I of a test channel1When can satisfy the charge-discharge demand to the battery package, switch over double-pole double-throw switch 2 on controlling this test channel on the parallel arrangement to the single channel output, again with this single channel output electricity respectively connect to the positive and negative pole of the battery package that needs high multiplying power to charge and discharge on, at this moment, total output is the single channel, and output current is I1And the current is consistent with the current of the input direct current power supply.
Example two: when the sum of the current intensities of the two testing channels can meet the charging and discharging requirements of the battery pack, the current intensity on each channel is I1And I2When in use, two output ends of the contactor 3 are respectively electrically connected to the positive electrode and the negative electrode of a battery pack which needs high-rate charging and discharging, and 2 double-pole double-throw switches 2 on the two testing channels controlled by the parallel device are respectively switched to the multi-channel output ends, so the total output is double channels, and the output current is I1+I2。
Example three: when n (n)>2) When the sum of the current intensities of the test channels can meet the charging and discharging requirements of the battery pack, the current intensities of the test channels are different and are I1、I2、……、InWhen in use, two output ends of the contactor 3 are respectively electrically connected to the positive electrode and the negative electrode of a battery pack which needs high-rate charge and discharge, and the parallel device controls n double-pole double-throw switches on the n test channels to be respectively switched to the multi-channel output ends, so that the total output is n channels, and the output current is I1+I2+……+In。
The parallel device can realize industrial batch production, avoids various uncertainties such as poor contact or excessive heat generation and the like generated in the manual wiring process, and the operator only needs to sleeve the wire noses at the tail ends of the positive and negative lead wires of the direct-current power supply on the positive and negative wiring terminals of the converter 1 respectively, screw down the fixing nut 104 and cover the cover plate 105 to complete wiring work. When the single-channel current just can satisfy the demand, directly connect the single-channel output on this passageway at the positive and negative two poles of a living beings package, the rethread switches double-pole double-throw 2 to the single channel end can. When a plurality of channels are required to be connected in parallel, two output ends of the contactor 3 are respectively connected to the positive electrode and the negative electrode of the battery pack, an operator selects a proper test channel according to the required current, and then the double-pole double-throw switch 2 on the channel is switched to the output end of the plurality of channels. The single-channel or multi-channel parallel output is effectively realized. The device has strong universality and simple and convenient operation, greatly reduces the complexity of the parallel operation of the traditional multi-channel direct-current power supply, and saves a large amount of manual wiring time.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a be applicable to multichannel DC power supply parallel arrangement which characterized in that: comprises a plurality of test channels arranged in a test cabinet and a parallel device;
each test channel comprises a direct current power supply for providing input current;
the parallel device comprises a plurality of converters (1), a plurality of double-pole double-throw switches (2) and two contactors (3); wherein one of the DC power supplies corresponds to one of the converters (1), and one of the converters (1) corresponds to one of the double-pole double-throw switches (2);
the converter (1) comprises a shell (101), a positive wiring column (102) and a negative wiring column (103) which are fixed in the shell (101), fixing nuts (104) which are screwed on the positive wiring column (102) and the negative wiring column (103), and a cover plate (105) which is tightly covered on the shell (101); the double-pole double-throw switch (2) comprises two input pins which are respectively a positive input pin (201) and a negative input pin (202), and also comprises four output pins which are respectively a multi-channel positive output pin (203), a multi-channel negative output pin (204), a single-channel positive output pin (205) and a single-channel negative output pin (206); each contactor (3) comprises a plurality of input ends and an output end;
a positive lead and a negative lead of the direct current power supply are respectively connected to the positive wiring column (102) and the negative wiring column (103) and are used as input ends of the parallel device; the positive terminal post (102) is electrically connected to the positive input pin (201), and the negative terminal post (103) is electrically connected to the negative input pin (202); the multi-channel positive output pin (203) is electrically connected to one input end of one contactor (3); the multi-channel negative output pin (204) is electrically connected to one input end of the other contactor (3);
the single-channel positive output pin (205) and the single-channel negative output pin (206) are respectively electrically connected with an electric wire with a wired nose at the tail end and serve as positive and negative 2 single-channel output ends; when the single-channel direct-current power supply can meet the charge and discharge requirements, the single-channel output end is respectively and electrically connected to the positive electrode and the negative electrode of a battery pack which needs high-rate charge and discharge; when two or more than two channels are connected in parallel to meet the charging and discharging requirements, the output ends of the two contactors (3) are respectively and electrically connected to the positive electrode and the negative electrode of a battery pack which needs high-rate charging and discharging.
2. The parallel device for multi-channel DC power supply of claim 1, wherein: the number of the converters (1) is larger than or equal to the number of the test channels.
3. The parallel device for multi-channel DC power supply of claim 1, wherein: the overcurrent capacity of the wire harness at the output end of the contactor (3) is larger than the sum of the overcurrent capacities of all the wire harnesses at the input end.
4. The parallel device for multi-channel DC power supply of claim 1, wherein: the tail ends of the cables of the positive lead and the negative lead of the direct-current power supply are in wire nose structures.
5. The parallel device for multi-channel DC power supply of claim 1, wherein: the shell (101) and the cover plate (105) of the converter (1) are made of insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111198371.1A CN114142582A (en) | 2021-10-14 | 2021-10-14 | Be applicable to multichannel DC power supply parallel arrangement |
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| CN202111198371.1A CN114142582A (en) | 2021-10-14 | 2021-10-14 | Be applicable to multichannel DC power supply parallel arrangement |
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| CN115333504A (en) * | 2022-10-12 | 2022-11-11 | 电子科技大学 | Power distribution network monolithic microwave integrated circuit with integrated channel switching |
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| CN203038042U (en) * | 2013-01-10 | 2013-07-03 | 福建利利普光电科技有限公司 | Series-parallel connection automatic switching device used for two-channel power supply |
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