CN111579994A - Battery charging and discharging measurement device and method suitable for different dimensions - Google Patents
Battery charging and discharging measurement device and method suitable for different dimensions Download PDFInfo
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- CN111579994A CN111579994A CN202010397114.XA CN202010397114A CN111579994A CN 111579994 A CN111579994 A CN 111579994A CN 202010397114 A CN202010397114 A CN 202010397114A CN 111579994 A CN111579994 A CN 111579994A
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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]
- G01R31/378—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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
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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]
- G01R31/364—Battery terminal connectors with integrated measuring arrangements
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a device and a method for measuring charge and discharge of batteries with different dimensions. The measuring device has certain universality, the width and the height of the measuring device can be adjusted randomly within a certain range, and the measuring device can cover square lithium ion batteries with almost all sizes in the current market; by adopting the measuring device, the good heat dissipation condition is still kept after the battery is clamped, so that the measurement of a charge and discharge test of the lithium ion battery in a constant temperature environment is conveniently carried out; a temperature measuring element quick-insertion structure is designed at the contact position of the battery tab, so that the temperature change of the battery tab area in the charging and discharging process is easily and accurately measured.
Description
Technical Field
The invention belongs to the technical field of battery testing, particularly relates to the field of lithium ion batteries used in the current market in a large scale, and particularly relates to a battery charge and discharge measuring device and method suitable for different sizes and specifications.
Background
With the rapid development and popularization of the electric automobile industry, the host factory has raised higher requirements on the energy density, safety, cost and battery management technology of the power lithium ion battery. The square lithium ion battery has the advantages of simple structure, high energy density, good safety, easy grouping and capacity expansion, high energy efficiency of a battery pack, simple management system and the like, and gradually becomes one of the most main energy storage elements of a power system of an electric automobile (especially an electric commercial vehicle). At present, the square lithium ion batteries used in a large scale are numerous in size and type, more than 100 square lithium ion battery size types are still applied in the current market according to the electric automobile square battery size standard GB/T34013 plus 2017 electric automobile power storage battery product specification and size established in 2017 in China, and the universal charging and discharging test clamp facing the square lithium ion batteries is less common in the current market.
The formation and grading stages of the power lithium ion battery before leaving factory and the design and model selection stages of the power battery before grouping are required to carry out necessary charge and discharge test measurement on the lithium ion battery so as to obtain data indexes of the battery in the aspects of capacity, rate capability, high and low temperature performance, heat generation rate and the like; meanwhile, when various research institutions perform relevant basic research on lithium ion batteries, battery charge and discharge tests are also necessary basic experiments. When a lithium ion battery charge and discharge test is performed, a special test fixture is usually used to connect the battery with a charge and discharge test device, and three basic parameters of voltage, current and temperature of the lithium ion battery are further measured.
At present, automobile-used square lithium ion battery monomer connects and has adopted the fixed connected mode of lock bolt very little (because of it is great with contact resistance in space in groups, and easily shortcoming such as not hard up during the vibration), adopts aluminium row or copper bar to constitute the module with lithium ion battery utmost point post welding mostly, and this square lithium ion battery utmost point post is generally less than 5mm, need weld the convergent current piece (nickel piece or copper sheet) at battery utmost point post when developing its charge-discharge test at present to adopt the crocodile to press from both sides and be connected with charging and discharging equipment. Obviously, when the method is used for measuring the charging and discharging of the lithium ion battery, the welded bus plates cause irreversible damage to the battery and are difficult to disassemble, and the tested battery is difficult to perform subsequent grouping use; meanwhile, the bus bar is welded by laser welding, the welding method has high technical requirements and certain safety risks, and can be finished by special welding equipment and professional technicians. Therefore, there is a need to design a charging and discharging test fixture suitable for a square lithium ion battery to serve battery factories, whole car factories and research institutes to rapidly develop charging and discharging tests of the square lithium ion battery.
In addition, the shape and position of the tab of the lithium ion battery have very important influences on current distribution, heat generation and heat dissipation in the lithium ion battery, and the battery post can also become a high-temperature region in the battery charging and discharging process due to large tab resistance and post welding resistance. Therefore, the temperature of the positive and negative pole regions of the square lithium ion battery is usually required to be tested when a charge and discharge experiment of the square lithium ion battery is carried out, so that the optimal design of the pole position and the size of the square lithium ion battery is completed when the battery structure is designed. However, an experimental device for measuring the temperature of the pole of the square lithium ion battery on line is still absent in the current market, and the temperature measuring element (such as a thermal resistor) is directly stuck to the position of the pole, and the technical defects of large measurement error (caused by large contact thermal resistance), poor reliability (such as falling of the temperature measuring element caused by heating in the measurement process), poor safety and the like exist. Therefore, the on-line measurement design of the pole column temperature needs to be integrated into the square lithium ion battery charge and discharge measurement clamp to serve the structural design and optimization of the large-scale square lithium ion battery of the electric automobile.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a method for measuring the charge and discharge of batteries with different dimensions, which are particularly suitable for the square lithium ion battery used in the current market in a large scale manner, and solve the problems that the conventional square lithium ion battery needs to be welded with a bus sheet after the charge and discharge test to damage the battery, the process is complex and the temperature measurement of a battery pole is lacked.
In order to solve the technical problems, the invention adopts the following technical scheme:
the device is suitable for measuring the charge and discharge of the batteries with different dimensions and specifications and comprises a base, a cylinder arranged on the base, a cross beam capable of moving up and down along the cylinder, a clamping mechanism for clamping the battery to be tested, a connecting piece for connecting a lead and the battery to be tested and an extrusion piece for extruding the connecting piece on the surface of the battery to be tested;
at least two columns are arranged, wherein at least one column is a movable upright post capable of moving along the base; the cross beam is a length-adjustable structure;
the clamping mechanism comprises connecting parts used for being connected with the cylinders on the two sides and a length-adjustable telescopic part arranged between the two connecting parts;
the extrusion jacking piece is connected to the cross beam, and the position of the extrusion jacking piece on the cross beam is adjustable;
the connecting piece is provided with a temperature measuring element.
Specifically, a first through hole for the upright post to pass through is formed in the cross beam, and a longitudinal locking piece for fixing the longitudinal position of the cross beam is arranged at the joint of the cross beam and the upright post;
the longitudinal locking piece comprises an opening adjusting piece and a spring, a cavity for placing the spring is formed in the cross beam, the opening adjusting piece is connected with the spring, and the opening adjusting piece can move along the extension direction of the spring; the opening adjusting piece is provided with a first tooth groove, and the side surface of the upright post is provided with a second tooth groove meshed with the first tooth groove.
Specifically, a detachable cover plate is arranged on a cavity of the cross beam, and a limiting clamping groove for moving the opening adjusting part is formed in the cover plate; and a third tooth socket capable of being meshed with the first tooth socket is arranged on the wall of the first through hole.
Specifically, the beam is formed by sequentially splicing three sections of short beams, at least one short beam is provided with a dovetail groove, and the other two short beams are inserted into the dovetail groove; and adjacent short beams are fixed by a transverse locking piece.
More specifically, the three sections of short cross beams are provided with second through holes for the extrusion jacking parts to pass through, the three sections of short cross beams are provided with dovetail grooves, the transverse locking part is a fixed block matched with the dovetail grooves in shape, and the fixed block is provided with third through holes for the extrusion jacking parts to pass through.
Specifically, the two connecting parts of the clamping mechanism are the same in structure, each connecting part comprises a lug, a bolt and an L-shaped connecting piece, the lug, the bolt and the L-shaped connecting piece are fixed on the side part of the column, one end of each L-shaped connecting piece is provided with a first jack through which the lug penetrates, and the lug is provided with a second jack through which the bolt penetrates; the two ends of the telescopic piece are connected with the other end of the L-shaped connecting piece in the two connecting parts.
Specifically, the connecting piece on be provided with and be used for placing the terminal recess of crowded top member, the both sides of connecting piece are provided with utmost point ear respectively, are provided with the draw-in groove of placing temperature measurement element on one of them side utmost point ear.
Specifically, the top extrusion piece is a bolt, and the top of the bolt is coated with an insulating and heat-insulating material layer.
Specifically, two upright posts are provided, wherein one upright post is fixed on the base, and the other upright post is inserted into a sliding groove of the base; the upright post in the sliding groove adjusts the distance between the two upright posts by moving in the sliding groove.
The invention also discloses a battery charge and discharge measuring method suitable for different dimensions, which is used for measurement and comprises the following steps:
Compared with the prior art, the invention has the beneficial effects that:
(1) the width and the height of the measuring device can be adjusted at will within a certain range, and the measuring device can cover square lithium ion batteries with almost all sizes in the current market (see the national standard GB/T34013-2017).
(2) By adopting the measuring device, the good heat dissipation condition is still kept after the battery is clamped, and the measurement of the charge and discharge test of the lithium ion battery in the constant temperature environment is convenient to carry out.
(3) A temperature measuring element quick-insertion structure is designed at the contact position of the lithium ion battery tab, so that the temperature change of a battery post area in the charging and discharging process is easy to measure.
(4) The measuring device is easy to disassemble and simple to operate.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Fig. 1 is a schematic view of an apparatus equipped with a clamping mechanism according to an embodiment of the present invention.
Fig. 2 is a schematic view of the apparatus according to the embodiment of the present invention when the clamping mechanism is not mounted.
Fig. 3 is an enlarged view of a portion of the longitudinal locker at I of fig. 1, when it is opened.
Fig. 4 is a schematic structural view of an opening adjustment member according to an embodiment of the present invention.
Fig. 5 is a schematic view illustrating the installation of the aperture adjustment member on the side of the cross beam according to the embodiment of the present invention.
Fig. 6 is an exploded view of the clamping mechanism according to the embodiment of the present invention connected to one of the pillars.
FIG. 7 is a schematic view of a transverse locking member in a transverse beam according to an embodiment of the present invention.
Fig. 8 is a schematic structural view of a lateral locking member according to an embodiment of the present invention.
Fig. 9 is a plan view (1-1) and a front view (1-2) of a connector according to an embodiment of the present invention.
Fig. 10 is a plan view (1-1) and a front view (1-2) of the cross member according to the embodiment of the present invention in a stretched state.
Fig. 11 is a plan view (1-1) and a front view (1-2) of the cross member according to the embodiment of the present invention in a combined state.
Fig. 12 is a view showing the structure of the device after the battery to be tested is mounted.
The reference numerals in the figures denote:
1-a base, 2-a column, 3-a beam, 4-a clamping mechanism, 5-a connecting piece, 6-a top extrusion piece, 7-a longitudinal locking piece, 8-a transverse locking piece and 9-a battery to be tested;
21-a second gullet;
31-a cavity, 32-a cover plate, 33-a limiting clamping groove, 34-a third tooth groove, 35-a dovetail groove and 36-a second through hole;
41-connecting part, 42-telescopic part;
411-projection, 412-plug, 413-L-shaped connector, 414-first jack, 415-second jack;
51-groove, 52-tab;
71-split adjuster, 72-spring; 711-first gullet;
81-third through hole.
The details of the present invention are explained in further detail below with reference to the drawings and the detailed description.
Detailed Description
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
In the present invention, unless otherwise specified, use of the directional terms "upper" and "lower" generally refer to the definition in the drawing figures, in which reference is made to the drawing figures of the accompanying drawings, and "inner" and "outer" refer to the inner and outer of the outline of the corresponding component.
Example 1
As shown in fig. 1, the present embodiment discloses a battery charge and discharge measurement apparatus suitable for different dimensions, which includes a base 1, a column 2 disposed on the base 1, a cross beam 3 capable of moving up and down along the column 2, a clamping mechanism 4 for clamping a battery 9 to be tested, a connecting member 5 for connecting a lead (or a temperature data acquisition line) and the battery 9 to be tested, and an ejection member 6 for ejecting the connecting member 5 onto the top surface of the pole of the battery 9 to be tested.
The two columns 2 in the embodiment are provided, wherein one column 2 is a movable upright post capable of moving along the base 1, so that the distance between the two columns 2 is adjustable. Specifically, in this embodiment, a sliding groove (not shown) is disposed on the base 1, one of the pillars is inserted into the sliding groove of the base 1, and the pillar 2 in the sliding groove moves in the sliding groove to adjust the distance between the two pillars 2.
The bottom plate 1 is required to be smooth when being processed, the bottom plate 1 is made of aluminum alloy or other alloy materials or polymers with certain strength, heat-conducting insulating materials can be sprayed or coated according to the needs of users, the bottom plate 1 is ensured to be smooth when the bottom plate 1 is processed, the friction force is enabled to be as small as possible, and the movable stand column is convenient to move. The materials of the upright posts 2 and the cross beams 3 are also aluminum alloy or other alloy materials or polymers with certain strength, and the heat-conducting insulating materials can be sprayed or coated according to the needs of users.
Meanwhile, the two ends of the cross beam 3 are connected to the upright posts 2, so that the cross beam 3 is of a structure with adjustable length. Specifically, in this embodiment, the beam 3 is formed by sequentially splicing three short beams, at least one short beam is provided with a dovetail groove 35, and the other two short beams are inserted into the dovetail groove 35, that is, the beam is integrally of a pull-out structure. The length of the middle short beam is equal to the sum of the lengths of the two sides, the lengths of the two sides are equal, and the short beams at the two ends can completely cover the middle short beam after being compressed. The adjacent short beams are fixed by a transverse locking piece 8, and when the length of the beam 3 is adjusted to a proper position, the beam 3 is fixed by the transverse locking piece 8, as shown in figure 2.
Specifically, as shown in the section 7 and fig. 8, the transverse locking member 8 is a fixing block matched with the dovetail groove 35 in shape, the longitudinal section of the fixing block is i-shaped, and the fixing block is made of aluminum alloy or other alloy materials or polymers with certain strength. The three short beams are all provided with second through holes 36 for the top extrusion pieces 6 to pass through, in this embodiment, the second through holes 36 are in a kidney-shaped groove structure, as shown in fig. 7. The second through holes 36 on the middle short beam are arranged at two ends of the middle short beam, and the second through holes 36 on the short beams on two sides penetrate to the longitudinal locking piece 7 along the length direction of the short beams.
All be provided with dovetail 35 on the three-section short beam, be provided with the third through-hole 81 that supplies crowded top 6 to pass on the horizontal retaining member 8. And the transverse locking piece 8 is arranged in the dovetail groove 35 of the upper-layer short beam at the overlapping part of the two adjacent short beams. The top extrusion piece 6 penetrates through the transverse locking piece 8 and the overlapping part of two adjacent short cross beams to fix the three parts together.
The cross beam 3 can move up and down along the column 2 and then needs to be fixed at the position of the cross beam, specifically, the cross beam 3 is provided with a first through hole (not shown) for the upright column 2 to pass through, and a longitudinal locking member 7 for fixing the longitudinal position of the cross beam 3 is arranged at the joint of the cross beam 3 and the upright column 2, as shown in fig. 1.
As shown in fig. 3 to 5, the longitudinal locker 7 of the present embodiment includes an opening adjuster 71 and a spring 72. The cross beam 3 is provided with a cavity 31 for placing the spring 72, and the cavity 31 is formed by arranging a groove at two end positions of the cross beam 3 and installing a detachable cover plate 32 on the groove.
The opening adjusting piece 71 is connected with the spring 72, and the cover plate 32 is provided with a limiting clamping groove 33 for the movement of the opening adjusting piece 71, so that the longitudinal movement of the opening adjusting piece 71 is limited and can only move along the extension direction of the spring 72. The opening adjusting piece 71 is provided with a first tooth groove 711, a second tooth groove 21 meshed with the first tooth groove 711 is arranged on the side surface of the upright post 2 (namely, the upper half part of the upright post 2 in figure 1), and the length of the second tooth groove 21 is determined according to the longitudinal stress of the cross beam 3 (namely, the pressure capable of being borne by the top-squeezing piece 6).
When the position of the cross beam 3 needs to be adjusted, the opening adjusting piece 71 is pushed to press the spring 72, so that the first toothed slot 711 and the second toothed slot 21 are opened, after the cross beam 3 is moved to a proper position, the opening adjusting piece 71 is released, and the spring 72 rebounds to enable the first toothed slot 711 to be re-engaged with the second toothed slot 21 on the upright post 2, so that the cross beam 3 is fixed.
In this embodiment, as shown in fig. 4, the opening adjusting member 71 is a T-shaped member, wherein the large end is provided with a first tooth socket and is disposed in the cavity 31, and the small end extends out of the cavity 31 through the limiting slot 33.
This embodiment may provide multiple lengths of spring 72 in parallel in cavity 31, as shown in fig. 10 and 11, to improve stability.
In addition, a third slot 34 capable of engaging with the first slot 711 may be provided at the wall of the first through hole on the cross beam, and when the column is not inserted, the spring 72 pushes the opening adjustment member 71, so that the first slot 711 and the second slot 21 are plugged together to form an integral structure, as shown in fig. 3.
Preferably, an insulating material is added to the inside of the longitudinal locker 7 to prevent leakage of electricity from the battery.
When the transverse locking piece 8 is installed, the transverse locking piece 8 is directly inserted into the dovetail groove of the cross beam, and the transverse locking piece 8 can slide in the dovetail groove 35 of the cross beam. The springs 72 in the longitudinal locking members 7 and the cover plate 32 on the cross beam 3 are then mounted.
In this embodiment, the clamping mechanism 4 includes a connecting portion 41 for connecting with the two side columns 2 and a length-adjustable telescopic member 42 provided between the two connecting portions 41.
Wherein the two connecting portions 41 of the clamping mechanism 4 are structurally identical.
Specifically, as shown in fig. 6, the connection part 41 includes a protrusion 411 fixed to a side of the column 2, a latch 412, and an L-shaped connection piece 413. In this embodiment, the plug 412 is a T-shaped structure. One end of the L-shaped connector 413 is provided with a first insertion hole 414 for the projection 411 to pass through, the projection 411 is provided with a second insertion hole 415 for the bolt 412 to pass through, after the projection 411 passes through the first insertion hole 414, the bolt 412 is inserted into the second insertion hole 415 on the projection, so as to fix the projection 411 and the L-shaped connector 413. In addition, one end of the L-shaped connector 413 connected to the telescopic member 42 is formed by two rods, so that the contact area between the battery 9 to be tested and the L-shaped connector 413 can be reduced, and the battery 9 to be tested can maintain good heat dissipation conditions.
Both ends of the telescopic member 42 are connected to the other ends of the L-shaped connecting members 413 of the two connecting portions 41. The telescopic member 42 in this embodiment is a spring, and both ends of the spring are connected to the L-shaped connecting member 413 through hooks.
The clamping mechanism 4 of the present embodiment can not only support the battery 9 to be tested, but also form a lateral fixing for the battery 9 to be tested.
The L-shaped connector 413 is made of aluminum alloy or other alloy material or polymer with certain strength, and can be sprayed or coated with a heat-conducting insulating material according to the user's needs.
The connector 5 of this embodiment is placed on top of the pole of the battery 9 to be tested. Specifically, as shown in fig. 9, a groove 51 for placing the end of the top-squeezing piece 6 is arranged on the connecting piece 5, and the connecting piece 5 is of a basin-shaped structure as a whole. The connecting piece 5 is made of a stamping piece of copper with a certain thickness. The bottom surface is coated with a good conductive plastic material to reduce the contact resistance.
Preferably, the upper and lower surfaces of the connecting member 5 are coated with a plastic conductive material to improve the conductivity thereof.
The connector 5 is further provided with a temperature measuring element, specifically, two sides of the connector 5 are respectively provided with a tab 52, wherein one side of the tab is used for connecting a wire, and the wire for testing current and voltage is fixed by a bolt (or a clamp). The tab on the other side is used for placing a temperature measuring element, and a clamping groove (not marked in the figure) is arranged on the tab 52 for placing the temperature measuring element.
And plastic heat conduction materials are coated in the clamping grooves to ensure good heat conduction between the battery pole and the temperature measurement element. The temperature measuring elements in the present embodiment are thermal resistors, thermocouples, and the like.
The top extrusion piece 6 of the embodiment is connected to the cross beam 3, the position of the top extrusion piece 6 on the cross beam 3 can be adjusted through the sliding transverse locking piece 8, and the top extrusion piece 6 is used for extruding the connecting piece 5 on the top surface of the pole of the battery 9 to be tested.
Specifically, the top-extruding member 6 of the present embodiment is a bolt made of copper, and the top of the bolt is covered with a "straight" knob made of insulating material (such as plastic, rubber, etc.) so as to save labor, insulate heat and be safe when the bolt is manually adjusted.
The device can replace the clamping mechanism 4 according to the thickness of the battery 9 to be tested, and the width and the height of the clamping mechanism 4 cover all the square lithium ion battery types (refer to the national standard GB/T34013-2017).
Example 2
The embodiment discloses a battery charge and discharge measurement method suitable for different dimensions, which uses the battery charge and discharge measurement device described in the embodiment to perform measurement, and specifically comprises the following steps:
and 2, adjusting the position of the cross beam 3 on the stand column 2 to enable the cross beam 3 to be located at a distance of 3-5 mm from the electrode column end face of the battery 9 to be tested, and fixing the cross beam 3.
Specifically, the opening adjusting member 71 is pushed to press the spring 72, so that the first tooth groove 711 and the second tooth groove 21 are opened, after the cross beam 3 moves to a proper position, the opening adjusting member 71 is released, and the spring 72 rebounds to re-engage the first tooth groove 711 with the second tooth groove on the upright 2, so as to fix the position of the cross beam 3. The invention can also be fixed by other structures, preferably the longitudinal locking member 7 of the embodiment.
The connecting piece 5 is placed on the top surface of the positive and negative electrode posts of the battery 9 to be tested, the ejection piece 6 is finely adjusted, and the ejection piece 6 is screwed to enable the connecting piece 5 to be ejected on the top surface of the positive and negative electrode posts of the battery 9 to be tested, so that the bottom of the connecting piece 5 is in close contact with the positive and negative electrode posts of the battery 9 to be tested.
It should be noted that the temperature measuring element can be arranged at other positions of the battery besides the tab of the connecting member 5, so as to accurately measure and record the terminal voltage, the current and the typical position temperature in the charging and discharging processes of the square lithium ion battery.
It should be noted that the device and method of the present invention are not limited to the prismatic lithium ion battery, but can also be applied to other batteries with the structural characteristics matched with the device of the present application.
In the above description, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be understood broadly, and may be, for example, fixedly connected or detachably connected or integrated; either a direct connection or an indirect connection, and the like. The specific meaning of the above terms in the present technical solution can be understood by those of ordinary skill in the art according to specific situations.
The respective specific technical features described in the above-described embodiments may be combined in any suitable manner without contradiction as long as they do not depart from the gist of the present invention, and should also be regarded as being disclosed in the present invention.
Claims (10)
1. The device is suitable for measuring the charge and discharge of batteries with different dimensions and specifications and is characterized by comprising a base (1), a cylinder (2) arranged on the base (1), a cross beam (3) capable of moving up and down along the cylinder (2), a clamping mechanism (4) used for clamping a battery to be tested (9), a connecting piece (5) used for connecting a lead and the battery to be tested (9) and an extrusion piece (6) used for extruding the connecting piece (5) on the surface of the battery to be tested (9);
at least two cylinder bodies (2) are arranged, wherein at least one cylinder body (2) is a movable upright post capable of moving along the base (1); the cross beam (3) is a length-adjustable structure;
the clamping mechanism (4) comprises connecting parts (41) used for being connected with the two side columns (2) and a length-adjustable telescopic part (42) arranged between the two connecting parts (41);
the extrusion jacking piece (6) is connected to the cross beam (3), and the position of the extrusion jacking piece (6) on the cross beam (3) is adjustable;
the connecting piece (5) is provided with a temperature measuring element.
2. The battery charging and discharging measurement device suitable for different dimensions and specifications as defined in claim 1, wherein the cross beam (3) is provided with a first through hole for the upright post (2) to pass through, and a longitudinal locking member (7) for fixing the longitudinal position of the cross beam (3) is arranged at the joint of the cross beam (3) and the upright post (2);
the longitudinal locking piece (7) comprises an opening adjusting piece (71) and a spring (72), a cavity (31) for placing the spring (72) is formed in the cross beam (3), the opening adjusting piece (71) is connected with the spring (72), and the opening adjusting piece (71) can move along the extension direction of the spring (72); the opening adjusting piece (71) is provided with a first tooth groove (711), and the side surface of the upright post (2) is provided with a second tooth groove (21) meshed with the first tooth groove (711).
3. The battery charging and discharging measurement device suitable for different dimensions as recited in claim 2, characterized in that a detachable cover plate (32) is arranged on the cavity (31) of the beam, and a limit slot (33) for the opening adjusting piece (71) to move is arranged on the cover plate (32); and a third tooth groove (34) capable of being meshed with the first tooth groove (711) is arranged on the wall of the first through hole.
4. The battery charge and discharge measuring device suitable for different dimensions according to claim 1, wherein the cross beam (3) is formed by sequentially splicing three short cross beams, at least one short cross beam is provided with a dovetail groove (35), and the other two short cross beams are inserted into the dovetail groove (35); the adjacent short beams are fixed by a transverse locking piece (8).
5. The battery charging and discharging measurement device suitable for different dimensions according to claim 4, wherein the three short beams are provided with second through holes (36) for the top extrusion member (6) to pass through, the three short beams are provided with dovetail grooves (35), the transverse locking member (8) is a fixed block matched with the dovetail grooves (35) in shape, and the fixed block is provided with third through holes (81) for the top extrusion member (6) to pass through.
6. The battery charging and discharging measurement device suitable for different dimensions as recited in claim 1, wherein the two connection parts (41) of the clamping mechanism (4) are structurally the same, the connection part (41) comprises a projection (411) fixed on the side of the cylinder (2), a plug (412) and an L-shaped connector (413), one end of the L-shaped connector (413) is provided with a first insertion hole (414) for the projection (411) to pass through, and the projection (411) is provided with a second insertion hole (415) for the plug (412) to pass through; and two ends of the telescopic piece (42) are connected with the other ends of the L-shaped connecting pieces (413) in the two connecting parts.
7. The battery charging and discharging measurement device suitable for different dimensions and specifications as defined in claim 1, wherein the connecting member (5) is provided with a groove (51) for placing the tail end of the pushing member (6), two sides of the connecting member (5) are respectively provided with a tab (52), and one of the tabs (52) is provided with a slot for placing a temperature measurement element.
8. The battery charge and discharge measurement device suitable for different dimensions as recited in claim 1, wherein the top extrusion member (6) is a bolt, and the top of the bolt is covered with an insulating and heat-insulating material layer.
9. The battery charge and discharge measuring device suitable for different dimensions according to claim 1, wherein there are two upright posts (2), one of which is fixed on the base (1) and the other is inserted into the sliding groove of the base (1); the upright (2) in the chute adjusts the distance between the two uprights (2) by moving in the chute.
10. A battery charge-discharge measurement method suitable for different dimensions, characterized in that the measurement is performed using the battery charge-discharge measurement apparatus of any one of claims 1 to 9, the method specifically comprising:
step 1, pulling open a movable upright post (2), and placing a battery (9) to be tested into a clamping mechanism (4) to clamp the battery (9) to be tested;
step 2, adjusting the position of the cross beam (3) on the stand column (2) to enable the cross beam (3) to be located at a distance of 3-5 mm from the electrode column end face of the battery (9) to be tested, and fixing the cross beam (3);
step 3, adjusting the position of the top extrusion piece (6) to enable the tail end of the top extrusion piece (6) to be aligned to the positive and negative electrode columns of the battery to be tested; placing the connecting piece (5) above the positive and negative electrode columns of the battery (9) to be tested, and adjusting the pushing piece (6) to push the connecting piece (5) against the positive and negative electrode columns of the battery (9) to be tested;
step 4, connecting one side of the connecting piece (5) with a voltage and current test wire of the battery charging and discharging equipment, and recording the voltage and the test current of the battery terminal in real time; and a temperature measuring element is arranged on the other side of the connecting piece (5), and is connected with a data acquisition card to record the temperature data of the battery pole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010397114.XA CN111579994A (en) | 2020-05-12 | 2020-05-12 | Battery charging and discharging measurement device and method suitable for different dimensions |
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| CN202010397114.XA CN111579994A (en) | 2020-05-12 | 2020-05-12 | Battery charging and discharging measurement device and method suitable for different dimensions |
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| CN112557709A (en) * | 2020-12-09 | 2021-03-26 | 安徽浩瀚星宇新能源科技有限公司 | Charging and discharging mechanism for battery research and development test system |
| CN113030733A (en) * | 2021-02-05 | 2021-06-25 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Electric signal acquisition device adaptable to automobile power batteries of various specifications |
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| CN112557709A (en) * | 2020-12-09 | 2021-03-26 | 安徽浩瀚星宇新能源科技有限公司 | Charging and discharging mechanism for battery research and development test system |
| CN113030733A (en) * | 2021-02-05 | 2021-06-25 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Electric signal acquisition device adaptable to automobile power batteries of various specifications |
| CN113608086A (en) * | 2021-09-17 | 2021-11-05 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Insulation performance testing device |
| CN113839141A (en) * | 2021-09-23 | 2021-12-24 | 紫光展讯通信(惠州)有限公司 | Battery device for test |
| CN113839141B (en) * | 2021-09-23 | 2023-11-28 | 紫光展讯通信(惠州)有限公司 | Battery device for test |
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