CN111679207B - Metal-air battery and discharge test system - Google Patents
Metal-air battery and discharge test system Download PDFInfo
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- CN111679207B CN111679207B CN202010388104.XA CN202010388104A CN111679207B CN 111679207 B CN111679207 B CN 111679207B CN 202010388104 A CN202010388104 A CN 202010388104A CN 111679207 B CN111679207 B CN 111679207B
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 91
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- 210000005056 cell body Anatomy 0.000 claims abstract description 33
- 239000003792 electrolyte Substances 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 210000004027 cell Anatomy 0.000 claims description 48
- 238000007789 sealing Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 11
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- 238000009792 diffusion process Methods 0.000 description 4
- 229920006351 engineering plastic Polymers 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
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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
-
- 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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- General Physics & Mathematics (AREA)
- Hybrid Cells (AREA)
Abstract
The invention discloses a metal-air battery and a discharge test system, and belongs to the technical field of batteries. The metal-air battery comprises M groups of battery monomers, wherein each battery monomer comprises an electrolytic bath body; the air polar plate is connected to the electrolytic bath body; the metal polar plate can be selectively inserted into different positions in the electrolytic cell body, the distances from the metal polar plate to the air polar plate are different at different positions, and the metal polar plate and the air polar plate form a cavity on the electrolytic cell body in a surrounding manner; and an electrolyte injected into the chamber; and when M is not less than 1, the M groups of battery monomers are sequentially arranged and connected along the direction vertical to the metal polar plate, and the positive and negative stages of the M groups of battery monomers can be electrically connected in series or in parallel. And the discharge test system acquires and processes data of a discharge loop formed by the metal-air battery. The invention can flexibly adjust the pole plate distance, the reaction area, the pole plate combination form and the pole plate replacement type of the battery system according to the design requirement.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a metal-air battery and a discharge test system.
Background
The metal-air battery is a battery system including a fuel such as an active metal as a negative electrode, an aqueous phase or an organic phase such as an alkaline or neutral salt as an electrolyte, and an air diffusion electrode as a positive electrode. At present, metals commonly used as metal air negative electrode materials include aluminum, magnesium, zinc, iron, sodium, and the like. The positive electrode is an air diffusion electrode and consists of a catalyst layer, a diffusion layer, a current collecting net and the like. In a metal-air battery system, a metal cathode reacts with electrolyte to release electrons, the released electrons are carried to an air anode through an external negative current, and the air electrode obtains the electrons and then carries out a reduction reaction with water, so that the chemical reaction is continuously carried out. Because the metal-air battery has the characteristics of high specific energy, large battery capacity, stable discharge, safety, reliability, low cost and the like, the metal-air battery has attracted great interest of researchers in the field at present, and is expected to be applied to the fields of new energy automobiles, unmanned aerial vehicles, military portable equipment, fixed power generation devices and the like.
In a discharge loop formed by taking a metal-air battery as a power supply, the discharge characteristics of the battery, such as discharge voltage, discharge current, effective discharge time, battery temperature and the like, are closely related to the distance between two polar plates of the battery, the reaction area, the electrode combination form, the polar plate type and the like. The method is a basic premise for designing a metal-air battery system and carrying out engineering application by detecting the influence rule of battery structure parameters and material parameters on discharge characteristic parameters.
In the related art, in order to study the influence of the different parameters on the metal-air battery, the metal-air battery of different types is required to form a corresponding discharge loop for research, which brings great inconvenience and waste of cost and time.
Disclosure of Invention
The invention provides a metal-air battery, which can adjust the distance between polar plates and the reaction area of a battery system according to design requirements, change the type of the polar plates and freely adjust the combination form of the polar plates so as to solve the problem that a plurality of different metal-air batteries need to be provided for research in the related technology.
The invention also provides a discharge test system which can test the influence mechanism of the adjustment of the structural parameters and the material parameters of the battery on the discharge characteristic and provide a realization means for the optimal design of the metal-air battery.
To achieve the above object, according to an aspect of the present invention, there is provided a metal-air battery including: m groups of battery cells having a positive terminal and a negative terminal, the battery cells comprising: an electrolytic cell body; the air polar plate is connected to the electrolytic cell body and is electrically connected with the positive electrode end; the metal polar plate is electrically connected with the negative end, the metal polar plate can be selectively inserted into different positions in the electrolytic cell body, the distance from the metal polar plate to the air polar plate is different at each different position, and a cavity is formed by the metal polar plate and the air polar plate on the electrolytic cell body in a surrounding manner; and an electrolyte injected into the chamber;
and when M is not less than 1, the M groups of the battery monomers are sequentially arranged and connected along the direction vertical to the metal polar plate, and the positive ends and the negative ends of the M groups of the battery monomers can be electrically connected in series or in parallel.
The electrolytic tank body is provided with a plurality of insertion parts which are arranged at intervals, and the metal pole plate can be selectively inserted into the electrolytic tank body along the insertion parts.
The battery monomer comprises two air pole plates which are respectively positioned at two sides of the metal pole plate, the two air pole plates and the metal pole plate respectively enclose a cavity for containing the electrolyte, and the two air pole plates are both connected with the positive end.
The battery cell further includes: the top cover plate is connected to one side of the electrolytic cell body, which can seal the cavity, and the positive electrode end and the negative electrode end penetrate through the top cover plate; the front cover plate is connected with the electrolytic cell body by pressing the air polar plate, and an air window is arranged on the front cover plate and used for supplying air from the outside; and a rear cover plate connected to the side of the electrolytic cell body opposite to the front cover plate.
And a sealing strip is arranged on one side of the electrolytic cell body, which is connected with the front cover plate, and the air polar plate is pressed against the sealing strip for connection.
And the top cover plate is provided with a filling hole communicated with the cavity, and the electrolyte is injected into the cavity through the filling hole.
When the electrolytic cell is in an assembled state, the metal polar plates are in sealing fit with the electrolytic cell body, and when M is more than or equal to 2, a rear cover plate is not arranged on the battery monomer of the M-1 group positioned on the front side.
The front cover plate, the electrolytic bath body and the rear cover plate are connected through fasteners.
According to another aspect of the present invention, there is provided a discharge test system including: the metal-air battery is connected with a programmable direct current electronic load in series to form a discharge loop; the sensing measurement unit is connected with the metal-air battery and is used for measuring the discharge voltage, the discharge current and the temperature value of each battery cell, and the total discharge voltage and the total discharge current of the metal-air battery; and the signal acquisition unit is connected with the sensing measurement unit and used for acquiring the information of the sensing measurement unit and carrying out A/D conversion on the information into digital signals for data processing.
The sensing measurement unit comprises a shunt current sensor which is connected with the battery monomer in series to measure the discharge current of the battery monomer; the shunt voltage sensor is connected in parallel with the battery monomer to measure the discharge voltage of the battery monomer; the shunt temperature sensor is connected with the battery monomer to measure the temperature value of the battery monomer; the main circuit current sensor is connected in series with the metal-air battery to measure the total discharge current; and a total path voltage sensor connected in parallel to the metal-air battery to measure a total discharge voltage.
The invention has the following advantages:
1. the metal plate is inserted into the electrolytic cell body, electrolyte is injected into a cavity defined by the metal plate and the air plate, the leading-out terminal of the air plate is the positive electrode of the battery, the leading-out terminal of the metal plate is the negative electrode of the battery, a basic model of a metal-air battery system can be combined, the metal plate and the electrolytic cell body are arranged in a splicing mode, and the metal plate can be spliced to different positions of the electrolytic cell body, compared with a single battery structure solidified in the related technology, the invention is convenient for adjusting structural parameters, and the distance between the metal plate and the air plate can be adjusted by only changing the position of the metal plate on the electrolytic cell body on the premise of not disassembling the metal-air battery; the reaction area of the metal polar plate and the air polar plate is adjusted by controlling the injection amount of the electrolyte.
2. The invention is convenient to replace the polar plate, the type of the air polar plate can be replaced after the front cover plate is taken down, the type of the metal polar plate can be replaced after the top cover plate is taken down, the metal polar plate is convenient to insert and pull out in the electrolytic bath body, and the replacement is simple.
3. According to the invention, the metal polar plates and the electrolytic cell body are arranged in a splicing manner, and the metal polar plates can be spliced to different positions of the electrolytic cell body, so that air polar plates can be arranged on two sides of the metal polar plates, then electrolyte is injected into cavities on two sides, the wiring of the two air polar plates is connected with the positive end of the battery, the wiring of the metal polar plates is connected with the negative end of the battery, and the double-air-electrode metal-air battery can be formed;
the metal-air battery can comprise M battery monomers, when M =1, the metal-air battery can be used as a basic model of a metal-air battery system for research, when M is more than or equal to 2, all the battery monomers are connected in parallel, and electrodes of all the battery monomers are connected in series to form a metal-air battery monomer series battery pack; the electrodes of the battery monomers are connected in parallel to form a metal-air battery monomer parallel battery pack;
the combination form of the invention is flexible and changeable, and due to the flexible design of the die, the basic model of the metal-air battery can be converted into a double-air electrode metal-air battery, a metal-air battery monomer series battery pack, a metal-air battery monomer parallel battery pack and the like.
4. The invention can be used for researching the influence of the polar plate distance, the reaction area, the polar plate type, the combination form and the like of the metal-air battery on the discharge characteristics of the battery monomer or the battery pack, such as the discharge voltage, the discharge current, the battery temperature and the like by testing and processing the discharge loop formed by the metal-air battery, and has the advantages of simple operation, repeated use and low test cost.
Drawings
Fig. 1 and 2 show perspective views of a metal-air battery according to embodiment 1 of the present disclosure.
Fig. 3 shows a cross-sectional view of a metal-air battery according to embodiment 1 of the present disclosure.
Fig. 4 illustrates a perspective view of an electrolytic cell body of a metal-air battery according to an embodiment of the present disclosure.
Figure 5 shows a schematic view of the construction of the slot of the cell body of figure 4.
Fig. 6 illustrates a perspective view of a top cover plate of a metal-air battery according to an embodiment of the present disclosure.
Fig. 7 illustrates a perspective view of a front cover plate of a metal-air battery according to an embodiment of the present disclosure.
Fig. 8 shows a cross-sectional view of a dual air electrode metal-air cell according to embodiment 2 of the present disclosure.
Fig. 9 shows a perspective view of a metal-air battery cell series battery pack according to embodiment 3 of the present disclosure.
Fig. 10 shows a cross-sectional view of a metal-air cell series battery pack according to embodiment 3 of the present disclosure.
Fig. 11 illustrates a perspective view of a metal-air battery cell parallel battery pack according to embodiment 4 of the present disclosure.
Fig. 12 shows a cross-sectional view of a metal-air cell parallel battery pack according to embodiment 4 of the present disclosure.
FIG. 13 shows a circuit schematic of a discharge test system according to an embodiment of the present disclosure.
FIG. 14 shows a data flow diagram of a discharge test system according to an embodiment of the present disclosure.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Based on the problem that the metal-air battery in the related technology needs various structural types when the influence of structural parameters, material parameters and the like on the discharge of the metal-air battery is experimentally researched due to single structural solidification of the metal-air battery, the invention provides the following conception: the metal-air battery is provided, the battery monomer in the metal-air battery is flexibly designed, the polar plate distance and the reaction area of a battery system can be adjusted according to the design requirement, the polar plate type is changed, and the polar plate combination form can be freely adjusted; the discharge test system of the metal-air battery is used for testing the influence mechanism of the adjustment of the structural parameters and the material parameters of the battery on the discharge characteristics, and provides a means for realizing the optimal design of the metal-air battery.
For a better understanding of the inventive concept, the above-described technical solutions are described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
Fig. 1 and 2 illustrate perspective views of a metal-air battery according to embodiment 1 of the present disclosure, and fig. 3 illustrates a cross-sectional view of the metal-air battery according to embodiment 1 of the present disclosure.
Referring to fig. 1 to 3, the metal-air battery includes a battery cell 100, wherein the battery cell 100 includes an electrolyte tank 2, an air electrode plate 5, a metal electrode plate 6, and an electrolyte 7.
The electrolytic bath body 2 is approximately U-shaped and made of engineering plastics or organic glass, and the electrolytic bath body 2 is used as a basic framework for connecting other components.
The air plate 5 may be a standard air plate consisting of a catalyst layer, a diffusion layer and a current collecting net, which are known in the art and will not be described in detail herein.
The air electrode plate 5 is attached to one side of the electrolytic bath body 2, and for the sake of convenience, the side on which the air electrode plate 5 is located is defined as "front", and the other side of the electrolytic bath body 2 opposite to the air electrode plate 5 is defined as "rear", that is, the air electrode plate 5 is attached to the front side of the electrolytic bath body 2.
The metal polar plate 6 is at least one of an aluminum polar plate, a magnesium polar plate, a zinc polar plate and an iron polar plate.
The metal pole plates 6 can be inserted in different positions in the electrolytic tank body 2, the metal pole plates 6 are parallel to the air pole plates 5, when the metal pole plates 6 are selected to be inserted in different positions of the electrolytic tank body 2, the positions from the metal pole plates 6 to the air pole plates 5 are correspondingly changed, so that the distance between the pole plates can be changed by selecting the inserting positions of the metal pole plates 6 on the electrolytic tank body 2, meanwhile, the inserting form of the metal pole plates 6 can facilitate the replacement of the types of the metal pole plates 6, and the electrolytic tank has the advantages of convenience in inserting and pulling and simplicity in replacement; the metal polar plate 6 and the air polar plate 5 form a chamber on the electrolytic bath body 2.
The electrolyte 7 may be a sodium chloride aqueous solution with a concentration of 5% to 20%, and is injected into the chamber, and the reaction area between the metal plate 6 and the air plate 5 is adjusted by controlling the injection amount of the electrolyte 7.
In the metal-air battery, the battery monomer 100 adopts a flexible design, and the distance between the metal polar plate 6 and the air polar plate 5 can be adjusted and the type of the polar plate can be changed by changing the position of the metal polar plate 6 in the electrolytic tank body 2; the reaction area of the metal polar plate 6 and the air polar plate 5 is adjusted by controlling the adding amount of the electrolyte 7, so that the structure parameters and the material parameters of the metal-air battery are convenient to adjust, the influence of the polar plate distance, the reaction area, the polar plate type and the like of the metal-air battery on the discharge of the metal-air battery is convenient to research, and the metal-air battery has the advantages of convenience in adjustment, strong applicability, simplicity in operation, reusability and low test cost.
The electrolytic bath body 2 is provided with an inserting part, and the metal polar plate 6 can be inserted into the electrolytic bath body 2 along the inserting part.
Specifically, the insertion part may be an insertion groove 21, fig. 4 illustrates a perspective view of an electrolytic cell body of a metal-air battery according to an embodiment of the present disclosure, and fig. 5 illustrates a structural schematic view of the insertion groove of the electrolytic cell body in fig. 4. The left side and the right side of the electrolytic bath body 2 are respectively provided with N groups of slots 21 with opening width a and depth d and extending up and down, the distance between the slots 21 is b, and the thickness of the main bath body is l = N · a + (N + 1) · b; when the metal polar plate 6 is inserted into the ith slot 21, the polar plate distance between the metal polar plate 6 and the air polar plate 5 is (i-1) · a + i · b, wherein i ∈ [1,N ], i is an integer, and N >1,N is an integer. Corresponding parameters can be set according to actual conditions to meet the requirements of the distance between the polar plates, the reflection area and the like.
It should be noted that the inserting part may also be a slide rail, and the inserting of the metal plate 6 in the electrolytic cell body 2 is realized by arranging N sets of slide rails on the electrolytic cell body 2 and correspondingly arranging a slide groove on the metal plate 6.
The front surface of the electrolytic tank body 2 is also provided with a sealing strip 10, the sealing strip 10 can be adhered to the front surface of the electrolytic tank body 2 in an adhering mode, or a sealing groove is also arranged on the electrolytic tank body 2, and the sealing strip 10 is plugged into or adhered in the sealing groove. In an assembly state, the air polar plate 5 presses the sealing strip 10 to seal the cavity by the air polar plate 5.
Fig. 6 illustrates a perspective view of a top cover plate of a metal-air battery according to an embodiment of the present disclosure.
Referring to fig. 1 and 6, the battery cell 100 may further include a top cover plate 1, the top cover plate 1 is connected to the upper side of the electrolytic bath body 2 through screws, the top cover plate 1 has two through holes 12, the through holes 12 may be used for threading the terminals 9, one of the terminals 9 is a positive terminal 92 of the battery cell 100, the positive terminal 92 is electrically connected to the air electrode plate 5, the other terminal 9 is a negative terminal 91 of the battery cell 100, and the negative terminal 91 is electrically connected to the metal electrode plate 6.
The top cover plate 1 is further provided with a filling hole 13, the filling hole 13 penetrates through the top cover plate 1 to be communicated with the cavity, electrolyte 7 can be filled into the cavity through the filling hole 13, the filling hole 13 can also be used as a penetrating hole of the temperature sensor, and in addition, the filling hole 13 also has an exhaust function.
The material of the top cover plate 1 can be engineering plastic or organic glass.
Fig. 7 illustrates a perspective view of the front cover plate 3 of the metal-air battery according to an embodiment of the present disclosure.
Referring to fig. 1 and 7, the single battery 100 may further include a front cover plate 3, the front cover plate 3 is connected to the front side of the electrolytic bath body 2 and used for compressing the air electrode plate 5, and the front cover plate 3 abuts against the air electrode plate 5, so that the air electrode plate 5 presses the sealing strip 10 on the electrolytic bath body 2 to tightly connect the front cover plate 3, the air electrode plate 5 and the electrolytic bath body 2.
An air window 31 is provided in the front cover 3, and the air window 31 may partially expose the air electrode plate 5 for supplying air from the outside.
The material of the front cover plate 3 can be engineering plastics or organic glass.
With continued reference to fig. 1 and 2, the metal-air battery further includes a rear cover plate 4, the rear cover plate 4 is connected to the rear side of the electrolytic bath body 2, and the rear cover plate 4, the electrolytic bath body 2 and the front cover plate 3 are fastened and connected by a through bolt 8.
The material of the rear cover plate 4 can be engineering plastic or organic glass.
Inserting the metal polar plate 6 into the ith slot 21 of the electrolytic bath body 2, and sequentially connecting and pre-tightening the front cover plate 3, the air polar plate 5, the electrolytic bath body 2 and the rear cover plate 4 through bolts 8; leading out a connecting terminal of the air pole plate 5 through a through hole 12 of the top cover plate 1 to be used as a battery positive end 92, and leading out a connecting terminal of the metal pole plate 6 through the through hole 12 of the top cover plate 1 to be used as a battery negative end 91; covering the top cover plate 1 on the electrolytic bath body 2, and installing screws for fastening; and injecting electrolyte 7 from an injection hole 13 of the top cover plate 1, so that the air polar plate 5, the metal polar plate 6 and the electrolyte 7 form a metal-air battery system, wherein the leading-out terminal of the air polar plate 5 is the positive electrode of the battery, and the leading-out terminal of the metal polar plate 6 is the negative electrode of the battery, and the basic model of the metal-air battery is formed.
Example 2
Based on the embodiment 1, the basic model of the metal-air battery can be converted into a double-air electrode metal-air battery model, that is, a metal-air battery model including front and rear air electrode plates 5, an air electrode plate 5' and a middle metal electrode plate 6.
Fig. 8 shows a cross-sectional view of a dual air electrode metal-air cell according to embodiment 2 of the present disclosure.
The difference from example 1 is: the double air electrode metal-air battery has no back cover plate 4, and an air polar plate 5 'and a front cover plate 3' are connected at the back side of the electrolytic bath body 2. An electrolyte 7 'is injected between the metal plate 6 and the air plate 5'.
Specifically, the metal pole plate 6 is inserted into the ith slot 21 of the electrolytic cell body 2, and the front cover plate 3, the air pole plate 5, the electrolytic cell body 2, the air pole plate 5 'and the front cover plate 3' are connected and pre-tightened through the bolt 8 in sequence; leading out the wiring terminals of the air polar plate 5 and the air polar plate 5' through the through hole 12 of the top cover plate 1 to be used as a battery positive end 92, and leading out the wiring terminal of the metal polar plate 6 through the through hole 12 of the top cover plate 1 to be used as a battery negative end 91; covering the top cover plate 1 on the electrolytic bath body 2, and installing screws for fastening; and injecting the electrolyte 7 from the filling hole 13 of the top cover plate 1, so that the air electrode plate 5, the electrolyte 7, the metal electrode plate 6, the electrolyte 7 'and the air electrode plate 5' form a double-air-electrode metal-air battery model.
The combination form of the metal-air battery is flexible and changeable, and due to flexible design, a basic model of the metal-air battery can be converted into a double-air-electrode metal-air battery.
Example 3
Based on example 1, the metal-air battery may have M groups of battery cells 100, where M is an integer, and when M is greater than or equal to 2, each group of battery cells 100 is connected in a front-back arrangement, and M =2 is taken as an example for description below:
the basic metal-air battery model of example 1 can be converted into a two-group metal-air battery cell series battery model, i.e., a first group of metal-air battery cells 100 _1and a second group of metal-air battery cells 100 _2are connected in series to form a battery model.
Referring to fig. 9 and 10, a front cover plate 3, an air electrode plate 5, an electrolytic bath body 2, a metal electrode plate 6 and a top cover plate 1 form a first group of metal-air battery monomer 100_1; forming a second group of metal-air battery monomer 100 _2by using a front cover plate 3', an air polar plate 5', an electrolytic tank body 2', a metal polar plate 6', a top cover plate 1' and a rear cover plate 4; the anode 92 of the first group of metal-air battery monomer 100 _u1 is connected with the cathode 91 of the second group of metal-air battery monomer 100 _u2 through a lead, the two groups of battery monomers are connected and fastened through bolts 8, then electrolyte 7 is respectively added into a cavity between an air polar plate and a metal polar plate in the two groups of battery monomers, and then the two groups of metal-air battery monomer series battery pack models are manufactured, wherein the cathode of the first group of metal-air battery monomer 100 _u1 is the cathode of the series battery pack, and the anode of the second group of metal-air battery monomer 100 _u2 is the anode of the series battery pack.
The first group of metal air battery cells 100_1 is positioned at the front side of the second group of metal air battery cells 100_2, a metal pole plate in each battery cell is in sealing connection with an electrolytic bath body, and electrolyte in a cavity at the front side of the metal pole plate cannot enter the rear side of the metal pole plate, so that the installation of the rear cover plate 4 in the first group of metal air battery cells 100_1 can be omitted. The sealing connection between the metal polar plate and the electrolytic tank body can be realized by arranging a sealing strip on the metal polar plate or the electrolytic tank body.
In addition, at least one air hole 32 may be provided on the front cover plate of the second group of metal-air battery cells 100 _2to provide air to the air plate 6' of the second group of metal-air battery cells 100 _2through the air hole 32.
And by analogy, when M is larger than 2, the first group of metal-air battery cells, the second group of metal-air battery cells, … …, the M-1 group of metal-air battery cells and the M group of metal-air battery cells are sequentially arranged and connected in a front-back mode.
The rear cover plate 4 can be omitted from the first group of metal-air battery cells, the second group of metal-air battery cells, the … … and the M-1 group of metal-air battery cells, and the rear cover plate 4 is only mounted on the M group of metal-air battery cells; the air holes 32 are arranged on the front cover plates of the second group of metal-air battery single cells, … …, the M-1 group of metal-air battery single cells and the M group of metal-air battery single cells, so that air is provided for the air pole plates in the corresponding battery single cells.
The combination form of the metal-air battery is flexible and changeable, and due to flexible design, a basic model of the metal-air battery can be converted into a single metal-air battery series battery module.
The metal-air battery monomer series battery pack can adjust the distance between the metal polar plate and the air polar plate and change the type of the polar plate only by changing the position of the metal polar plate in the electrolytic bath body on the premise of not disassembling the metal-air battery; the reaction area of the metal polar plate and the air polar plate is adjusted by controlling the adding amount of the electrolyte, so the invention has the advantages of convenient adjustment, strong applicability, simple operation, repeated use and low test cost.
Example 4
Based on example 1, the metal-air battery may have M groups of battery cells 100, where M is an integer, and when M is greater than or equal to 2, each group of battery cells 100 is connected in a front-back arrangement, and M =2 is taken as an example for description below:
the basic metal-air battery model of example 1 can be converted into a parallel battery module model of two groups of metal-air battery cells, i.e., a first group of metal-air battery cells 100 _1and a second group of metal-air battery cells 100 _2are connected in parallel to form a battery module.
Referring to fig. 11 and 12, a front cover plate 3, an air electrode plate 5, an electrolytic bath body 2, a metal electrode plate 6 and a top cover plate 1 form a first group of metal-air battery monomer 100_1; forming a second group of metal-air battery monomer 100_2 by using a front cover plate 3', an air polar plate 5', an electrolytic tank body 2', a metal polar plate 6', a top cover plate 1' and a rear cover plate 4; the positive electrode 92 of a first group of metal-air battery monomer 100 is connected with the positive electrode 92 of a second group of metal-air battery monomer 100 through a lead, the negative electrode 91 of the first group of metal-air battery monomer 100 is connected with the negative electrode 91 of the second group of metal-air battery monomer 100 through a lead, the battery pack is connected and fastened through a bolt 8, then electrolyte 7 is added into a cavity between an air polar plate and a metal polar plate in the two groups of metal-air battery monomers respectively, so that a two-group metal-air battery monomer parallel battery pack model is manufactured, the positive electrodes of the two groups of metal-air battery monomers 100 connected through the lead are the positive electrodes of the parallel battery pack, and the negative electrodes of the two groups of metal-air battery monomers 100 connected through the lead are the negative electrodes of the parallel battery pack.
Other parts may be the same as embodiment 3, and are not described in detail here.
The combination form of the metal-air battery is flexible and changeable, and due to the flexible design, a basic model of the metal-air battery can be converted into a metal-air battery parallel-combined battery pack model.
The metal-air battery monomer parallel battery pack can adjust the distance between the metal polar plate and the air polar plate and change the type of the polar plate only by changing the position of the metal polar plate in the electrolytic bath body on the premise of not disassembling the metal-air battery; the reaction area of the metal polar plate and the air polar plate is adjusted by controlling the adding amount of the electrolyte, so the invention has the advantages of convenient adjustment, strong applicability, simple operation, repeated use and low test cost.
Fig. 13 illustrates a circuit schematic of a discharge test system according to an embodiment of the present disclosure, and fig. 14 illustrates a data flow schematic of a discharge test system according to an embodiment of the present disclosure.
Based on the metal-air battery, the invention provides a discharge test system for testing the influence mechanism of the adjustment of the structural parameters and the material parameters of the metal-air battery on the discharge characteristics, and provides an implementation means for the optimal design of the metal-air battery.
The discharge test system comprises a metal air battery, a sensing measurement unit and a signal acquisition unit;
the metal-air battery can be in any model form, and the metal-air battery is taken as an example in the following description, wherein the total positive electrode and the total negative electrode of the battery pack are connected in series with the programmable direct current electronic load R, and the programmable direct current electronic load R form a discharge loop.
The sensing and measuring unit is connected with the metal-air battery and comprises a shunt current sensor, a shunt voltage sensor, a shunt temperature sensor, a main circuit current sensor and a main circuit voltage sensor, wherein the current sensor adopts an ammeter, and the voltage sensor adopts a voltmeter. Each battery monomer is connected with a shunt current sensor in series to measure the discharge current of the battery monomer in the shunt current sensor; simultaneously, the positive pole and the negative pole of each battery monomer are connected with a shunt voltage sensor in parallel to measure the discharge voltage of the battery monomer in the shunt voltage sensor; the total positive pole and the total negative pole of the battery pack are connected with a total voltage sensor in parallel to measure the total discharge voltage of the battery pack; meanwhile, a main circuit current sensor is connected in series to measure the total discharge current of the battery pack; each battery monomer is respectively connected with a shunt temperature sensor so as to measure the temperature value of the battery monomer in the shunt. The sensing measurement unit is used for measuring the voltage, current and temperature information of each battery monomer of the battery pack and the total voltage and total current information of the battery pack and transmitting the total voltage and total current information to the signal acquisition unit for data processing.
The signal acquisition unit is connected with the sensing measurement unit and comprises a data acquisition card and a labview data acquisition program, the data acquisition card executes the data acquisition program, acquires the discharge voltage, the discharge current and the temperature value of each battery monomer measured by the sensing measurement unit and the total discharge voltage and the total discharge current of the battery pack, converts the analog signals into digital signals for data processing, and analyzes the discharge characteristics of each battery monomer of the series-parallel battery pack and the series-parallel battery pack.
The discharge system can be used for researching the influence of the polar plate distance, the reaction area, the polar plate type, the combination form and the like of the metal air battery on the discharge characteristics of the battery monomer or the battery pack, such as discharge voltage, discharge current, battery temperature and the like, and has the advantages of simple and convenient operation, repeated use, low test cost and strong practicability.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (3)
1. A metal-air battery, comprising: m groups of battery cells having a positive terminal and a negative terminal, the battery cells comprising:
an electrolytic cell body;
the air polar plate is connected to the electrolytic cell body and is electrically connected with the positive electrode end;
the metal polar plate is electrically connected with the negative end, the metal polar plate can be selectively inserted into different positions in the electrolytic cell body, the distance from the metal polar plate to the air polar plate is different at each different position, and a cavity is formed by the metal polar plate and the air polar plate on the electrolytic cell body in a surrounding manner; and
an electrolyte injected into the chamber;
wherein M is an integer of not less than 1;
in an assembly state, the metal polar plate is in sealing fit with the electrolytic cell body;
when M is more than or equal to 2, the M groups of the battery monomers are sequentially arranged and connected along the direction vertical to the metal polar plate, the positive ends and the negative ends of the M groups of the battery monomers can be electrically connected in series or in parallel, and the M-1 group of the battery monomers positioned on the front side is not provided with a rear cover plate,
the electrolytic tank body is provided with a plurality of inserting parts which are arranged at intervals, the metal polar plate can be selectively inserted into the electrolytic tank body along the inserting parts,
the battery monomer comprises two air polar plates which are respectively positioned at two sides of the metal polar plate, the two air polar plates respectively and the metal polar plate enclose a cavity for accommodating the electrolyte, the two air polar plates are both connected with the positive electrode end,
the battery cell further includes:
the top cover plate is connected to one side of the electrolytic cell body, which can seal the cavity, and the positive electrode end and the negative electrode end penetrate through the top cover plate;
the front cover plate is connected with the electrolytic cell body by pressing the air polar plate, and an air window is arranged on the front cover plate and used for supplying air from the outside; and
a rear cover plate connected to the side of the electrolytic bath body opposite to the front cover plate,
one side of the electrolytic cell body, which is connected with the front cover plate, is provided with a sealing strip, the air polar plate is connected with the sealing strip in a propping manner,
the top cover plate is provided with a filling hole communicated with the cavity and used for filling the electrolyte into the cavity through the filling hole, and
the front cover plate, the electrolytic bath body and the rear cover plate are connected through fasteners.
2. An electrical discharge test system, comprising:
the metal-air battery of claim 1, connected in series with a programmable dc electronic load to form a discharge loop;
the sensing measurement unit is connected with the metal-air battery and is used for measuring the discharge voltage, the discharge current and the temperature value of each battery cell, and the total discharge voltage and the total discharge current of the metal-air battery; and
and the signal acquisition unit is connected with the sensing measurement unit and used for acquiring the information of the sensing measurement unit and converting the information into digital signals for data processing by A/D conversion.
3. The discharge test system of claim 2, wherein the sensing measurement unit comprises:
the shunt current sensor is connected in series with the battery monomer to measure the discharge current of the battery monomer;
the shunt voltage sensor is connected in parallel with the battery monomer to measure the discharge voltage of the battery monomer;
the shunt temperature sensor is connected with the battery monomer to measure the temperature value of the battery monomer;
the main circuit current sensor is connected in series with the metal-air battery to measure the total discharge current; and
and the main circuit voltage sensor is connected in parallel with the metal-air battery to measure the total discharge voltage.
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