CN111048826A

CN111048826A - Automobile starting battery

Info

Publication number: CN111048826A
Application number: CN201911400774.2A
Authority: CN
Inventors: 徐广行; 严崇
Original assignee: Ma'anshan Green Brothers Technology Co Ltd
Current assignee: Ma'anshan Green Brothers Technology Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-04-21

Abstract

The invention relates to a vehicle starting battery, comprising: the battery pack comprises a battery box, a plurality of battery cells, a crimping plate, a series connection plate, a plurality of shunting pieces and electrodes; the electrode is fixedly arranged on the electrode pin; the series connection plate is fixedly arranged on the compression connection plate, and the first series connection plate and the second series connection plate enable the lug to be pressed against the pressing block; the battery core is inserted into the slot, and the shunt pieces are arranged at the two side parts of the box body; the shunting pieces are electrically connected with the charging protection circuit one by one; the upper end of the electrode is exposed from a case cover mounted on the case body. According to the automobile starting battery, the lithium ion battery cell or the sodium ion battery cell is adopted for energy storage, so that the battery cell can be well protected, the charging and discharging processes of the battery cell are balanced, and the service life of the battery is prolonged; when the battery core is in overvoltage, electric energy is converted into heat energy to be released, so that overheating of a circuit is avoided; the automobile starting battery is convenient to assemble, has stable discharging and charging capabilities, can meet the requirements of the automobile starting battery, and is suitable for market popularization and application.

Description

Automobile starting battery

Technical Field

The invention relates to the field of energy storage batteries, in particular to an automobile starting battery.

Background

Along with the improvement of the living standard of people at present, the possession of automobiles is also getting bigger and bigger, at present, the automobiles are mainly fuel oil automobiles, and when the automobiles are ignited, a starting battery of the automobiles is required to provide electric energy to realize the ignition of an engine. At present, a starting battery of a vehicle is mostly a lead-acid storage battery, the lead-acid storage battery is generally deeply charged and deeply discharged for 400 times, has memory, has a service life of about two years and is short in service life; the electricity storage capacity is gradually reduced or even lost along with the use of the lead-acid storage battery, so that the vehicle cannot be started, and great trouble is brought to a vehicle owner. In addition, in the charging process of the automobile starting battery, as the charging current is overlarge and the internal resistance is small, the electrolyte of the lead-acid battery generates higher heat, and the battery box is easy to leak the electrolyte to cause heavy metal lead pollution, thereby threatening the life health of people; in addition, lead-acid batteries are large in size and weight, and bring troubles to transportation and battery replacement.

At present, a large amount of lithium ion batteries and sodium ion batteries are gradually applied, lithium ion starting batteries are also available on the market, but the automobile starting batteries are generally emergency automobile starting batteries, and are not always installed in an automobile for charging, because the current emergency starting batteries adopt wires to realize series-parallel connection between electric cores, the wires and the lugs of the electric cores are connected together in a laser welding or tin soldering mode, the impedance can be increased due to the connection relationship, meanwhile, the connection position of the wires is melted due to the fact that a large amount of heat is generated due to overlarge current in the charging process of the starting batteries due to an automobile generator, the batteries are enabled to be short-circuited or broken and cannot be normally used, and even the batteries can be burnt out. In addition, when the starting battery is severely vibrated, the lead connection is easy to loosen, and great hidden danger is brought to the stability of the battery. In addition, lithium ion batteries and sodium ion batteries have more space for optimization as starting batteries for automobiles in relation to lead-acid batteries in terms of charging processes and corresponding protection.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings of the prior art, and provides an automobile starting battery which has excellent use efficiency through an integral structure design and a charging protection design.

An automobile starting battery comprising:

the battery box comprises a box body and a box cover, and a slot for accommodating the battery cell is arranged in the box body; the adjacent slots are separated by baffles with hollow middle parts, and the baffles are formed by inwards extending from the bottom and the side parts of the box body;

the battery cores are divided into a plurality of battery core groups;

the crimping plate is provided with a plurality of spaced supporting parts, a guide groove for a tab of the battery cell to pass through and a containing groove for containing the upper part of the battery cell are formed between the adjacent supporting parts, the containing groove is communicated with the guide groove, the supporting parts are provided with pressing blocks which are flush with the surfaces of the supporting parts, and the tab is bent and then attached to the pressing blocks;

the series connection plate comprises two first series connection plates, a plurality of second series connection plates and a circuit board, the two first series connection plates are arranged on one side, the circuit board is arranged on the other side, the first series connection plates comprise electrode pins, one first series connection plate and one second series connection plate are respectively and electrically connected with a tab corresponding to the positive electrode of the electric core group and a tab corresponding to the negative electrode of the electric core group, and the other first series connection plate and the other second series connection plate are respectively and electrically connected with a tab corresponding to the negative electrode of the electric core group and a tab corresponding to the positive electrode of the electric core group; the other second serial connection pieces are oppositely arranged in a staggered mode and are electrically connected with the lug corresponding to the positive electrode or the lug corresponding to the negative electrode of the electric core group respectively; the electric core groups are connected in series and then output by the electrode pins; the circuit board comprises a charging protection circuit corresponding to the electric core group, and the charging protection circuit is electrically connected with the first serial connection piece and/or the second serial connection piece;

the shunt plates comprise a non-metal substrate, and a metal heat conduction plate and a sheet-shaped pattern resistor which are respectively positioned on two sides of the non-metal substrate, wherein the pattern resistor is formed by bending a sheet-shaped metal strip, and the pattern resistor comprises a first contact end and a second contact end which are used for connecting the pattern resistor into a circuit;

and an electrode;

the electrode is fixedly arranged on the electrode pin; the series connection plate is fixedly arranged on the press connection plate, and the first series connection plate and the second series connection plate press the lug to the press block; the battery cell is inserted into the slot, and the shunting pieces are arranged at two side parts of the box body; the shunting pieces are electrically connected with the charging protection circuit one by one; the upper end of the electrode is exposed from the case cover mounted on the case body.

According to one embodiment of the invention, the charging protection circuit comprises an overvoltage detection circuit, an overvoltage protection driving circuit, a transistor switch circuit, a voltage stabilizing circuit, an overvoltage protection prompting circuit and a reverse connection protection prompting circuit, wherein the overvoltage detection circuit is used for being connected with the battery cells of the battery cell group so as to detect the voltage of the battery cells; the overvoltage protection driving circuit is connected with the overvoltage detection circuit and is used for sending a driving signal when the overvoltage detection circuit detects that the voltage of the battery cell is greater than a preset value;

the transistor switch circuit is used for being connected with a load, the overvoltage protection prompting circuit and a signal output end of the overvoltage protection driving circuit so as to discharge electric energy for charging the battery cell according to the driving signal; the voltage stabilizing circuit is used for being connected with the positive electrode of the battery core, the overvoltage protection prompting circuit and the reverse connection protection prompting circuit, the overvoltage protection prompting circuit is used for being electrically connected with the positive electrode of the battery core and the transistor switch circuit, the signal input end of the reverse connection protection prompting circuit is grounded, and the signal output end of the reverse connection protection prompting circuit is electrically connected with the voltage stabilizing circuit;

the pattern resistor is connected with the transistor switch circuit so as to shunt current charged into the battery cell group through the pattern resistor when the voltage of the battery cell reaches the preset value.

According to an embodiment of the present invention, the overvoltage detection circuit includes a first resistor, a second resistor, a third resistor, and a fourth resistor, a first end of the first resistor is used to be connected to the positive electrode of the battery, a first end of the second resistor is connected to a second end of the first resistor, a first end of the third resistor is connected to a second end of the second resistor and the overvoltage protection driving circuit, a first end of the fourth resistor is connected to a second end of the third resistor, and a second end of the fourth resistor is grounded.

According to an embodiment of the present invention, the overvoltage protection driving circuit includes a comparator, a fifth resistor, and a first capacitor, a positive input terminal of the comparator is connected to the overvoltage detection circuit, a negative input terminal of the comparator is connected to a first terminal of the first capacitor, an output terminal of the comparator is electrically connected to the transistor switch circuit, and a second terminal of the first capacitor is grounded; and the first end of the fifth resistor is used for being connected with the anode of the battery, and the second end of the fifth resistor is connected with the inverting input end of the comparator.

According to an embodiment of the present invention, the overvoltage protection driving circuit further includes a thyristor, a control electrode of the thyristor is connected to the first end of the second capacitor, an anode of the thyristor is grounded, and a cathode of the thyristor is electrically connected to the inverting input terminal of the comparator.

According to an embodiment of the present invention, the overvoltage protection driving circuit further includes a sixth resistor and a seventh resistor, a first end of the sixth resistor is connected to the non-inverting input terminal of the comparator, a second end of the sixth resistor is electrically connected to a first end of the seventh resistor, and a second end of the seventh resistor is connected to the output terminal of the comparator.

According to one embodiment of the invention, the voltage stabilizing circuit comprises a first voltage stabilizing diode, the anode of the first voltage stabilizing diode is connected with the power supply negative electrode connecting end of the comparator, and the cathode of the first voltage stabilizing diode is grounded.

According to an embodiment of the present invention, the voltage stabilizing circuit further includes a second zener diode, a second capacitor, and an eighth resistor, an anode of the second zener diode is connected to the signal output terminal of the reverse connection protection prompting circuit, and a cathode of the second zener diode is used for being connected to the anode of the battery; the second capacitor is connected with the second voltage stabilizing diode in parallel, the first end of the eighth resistor is connected with the signal output end of the reverse connection protection prompting circuit, and the second end of the eighth resistor is grounded.

According to one embodiment of the invention, the automobile starting battery with the charging protection function further comprises a booster circuit and a locking circuit, wherein the booster circuit is connected with the overvoltage protection driving circuit and is used for boosting a voltage signal output by the overvoltage protection driving circuit to a preset value; the locking circuit is connected with the boosting circuit and the transistor switch circuit and used for locking the switching state of the transistor switch circuit.

According to an embodiment of the present invention, the boost circuit includes a boost chip, an inductor, a third capacitor, a fourth capacitor, a third zener diode, an eleventh resistor, and a twelfth resistor, a first end of the inductor is electrically connected to the voltage stabilizing circuit and a fifth pin of the boost chip, a second end of the inductor is connected to an anode of the third zener diode and a first pin of the boost chip, a first end of the third capacitor is electrically connected to a fourth pin of the boost chip and the voltage stabilizing circuit, and a second end of the third capacitor is grounded; the first end of the fourth capacitor is connected with the cathode of the third voltage stabilizing diode, and the second end of the fourth capacitor is grounded; a first end of the eleventh resistor is connected with a cathode of the third zener diode, a second end of the eleventh resistor is connected with a first end of the twelfth resistor, a first end of the twelfth resistor is connected with a third pin of the boost chip, and a second end of the twelfth resistor is grounded;

the locking circuit comprises a first triode, a second triode, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor and a seventeenth resistor, wherein the base electrode of the first triode is connected with the first end of the thirteenth resistor and the first end of the fourteenth resistor, the collector electrode of the first triode is connected with the first end of the fifteenth resistor, and the emitter electrode of the first triode is grounded; a second end of the thirteenth resistor is connected with a signal output end of the overvoltage protection driving circuit, and a second end of the fourteenth resistor is grounded;

the base electrode of the second triode is connected with the first end of the sixteenth resistor and the second end of the fifteenth resistor, the collector electrode of the second triode is connected with the first end of the seventeenth resistor and the transistor switching circuit, the emitter electrode of the second triode is connected with the second end of the sixteenth resistor and the cathode of the third voltage stabilizing diode, and the second end of the seventeenth resistor is grounded.

According to the automobile starting battery, the lithium ion battery cell or the sodium ion battery cell is adopted for energy storage, so that the battery cell can be well protected, connecting wires connected inside the battery are reduced, the battery cell has relatively consistent contact resistance when being electrically connected, the charging and discharging processes of the battery cell are kept balanced, and the service life of the battery is prolonged; the battery cell can better convert electric energy into heat energy to be released when the battery cell is in overvoltage, avoid overheating of a circuit, simultaneously improve the temperature of the working environment of the battery cell, enhance the use efficiency of the battery cell due to the activity improvement of a lithium ion battery cell or sodium ions, and can perform reverse connection protection and prompt through a reverse connection protection prompt circuit to avoid misassembly when the battery cell is reversely connected; the automobile starting battery is convenient to assemble, has multiple fool-proof measures, has stable discharging and charging capabilities, can meet the requirements of the automobile starting battery, and is suitable for market popularization and application.

Drawings

FIG. 1 is a schematic diagram of a starting battery for a vehicle according to the present invention;

FIG. 2 is an exploded schematic view of the starting battery of the vehicle of FIG. 1;

FIG. 3 is an enlarged view of the nip plate of FIG. 2 from another perspective;

FIG. 4 is an enlarged view of the crimp and splice plates of FIG. 2;

FIG. 5 is an enlarged view of the string connecting plate and the cap of FIG. 2 from another perspective;

FIG. 6 is an enlarged view of one embodiment of the diverter blade of FIG. 2;

fig. 7 is a diagram of the positional relationship of the series tab and the tab in fig. 2;

FIG. 8 is a schematic block diagram of an embodiment of a vehicle starting battery and charging device of the present invention when connected;

FIG. 9 is a schematic block diagram of an embodiment of a charge protection circuit for a starting battery of an automobile according to the present invention;

fig. 10 is a schematic block diagram of another embodiment of a charge protection circuit for a starting battery of an automobile according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

As shown in fig. 1 to 7, the present invention is a schematic structural diagram of an automobile starting battery, which includes a battery case 1, a battery core 2, a compression joint plate 3, a series connection plate 4, a shunt 5 and an electrode 6.

The battery case 1 includes a case body 11, a case cover 12, and a base 13. A plurality of slots 111 are formed in the box body 11, the slots 111 are arranged side by side, and the slots 111 are used for fixedly placing the battery cells 2; adjacent slot 111 is separated by the baffle 112 of middle part fretwork, and baffle 112 is formed by the inside extension of the bottom and the lateral part of box body 11, and it is also to form slot 111 between adjacent baffle 112, specifically, baffle 112 through the middle part fretwork separates adjacent electric core 2, and the space that baffle 112 middle part fretwork formed in addition between adjacent electric core 2, can not appear not having the space and cause electric core or battery case bulge phenomenon because of electric core heating expansion. Stoppers 113 are provided on the upper portion of the case 11, and the stoppers 113 are symmetrically provided on both left and right sides of the case 11 for supporting and placing the compression bonding plates 3. The stopper 113 is disposed in the same direction as the shutter 112 in the case 11. Spacing post 114 sets up the four corners in box body 11, in order to make spacing post 114 can have the function of judging the installation direction, judge crimping plate 3 and concatenation board 4 promptly and place or the installation direction, in order to avoid placing or the installation direction mistake, in the actual process, correct assembly direction can place crimping plate 3 and concatenation board 4 or install in box body 11, wrong assembly direction can't place crimping plate 3 and concatenation board 4 or install in box body 11. The limiting columns 114 on two opposite corners of the box body 11 are different, preferably, two adjacent limiting columns 114 are different and different from the other two limiting columns 114; in practice, the relative spacing posts 114 may be different by providing the shape and/or size of the spacing posts 114. Slots 115 are located at the front and rear sides of the box body 11, a baffle 113 extends from the outside of one side wall of the slot 115, and the slot 115 is used for accommodating the heat sink.

The box cover 12 is provided with a handle 121, an electrode through hole 122 and a through hole 123, wherein the handle 121 is arranged outside the box cover 12 and used for lifting and moving the starting battery; the electrode through holes 122 are stepped cylindrical holes, one is distributed on the left and the right, and are used for starting penetration of an external positive electrode and an external negative electrode of the battery, and the electrode through holes 122 form a cylindrical accommodating space (not shown in the figure) at the lower part of the box cover 12; the through holes 123 are for screws or studs to pass through, and in the present embodiment, four through holes are provided at four corners of the box cover 12. The box cover 12 is mounted on the upper end of the box body 11, and a screw or stud is screwed into a threaded hole (not shown) on the limiting column 114 of the box body 11 through the through hole 123 to fix the box cover 12 on the box body 11.

The base 13 is provided with a positioning column 131 and a through hole 132, the positioning column 131 is used for determining the installation position of the box body 11 when the box body 11 is installed on the base 13, and the through hole 132 is used for a screw or a stud to pass through so as to fixedly install the base 13 and the box body 11. In this embodiment, four positioning pillars 131 are provided and symmetrically distributed; four through holes 132 are provided, and are respectively located at four corners of the base 13. After the box body 11 is arranged on the base 13, the lower end part of the box body 11 is coated by a convex edge extending from the edge of the base 13.

The upper end of the electric core 2 is provided with sheet-shaped tabs 21, wherein each electric core 2 is provided with two tabs 21, namely a positive tab and a negative tab. Electric core 2 has a plurality ofly, can select according to the voltage that the battery needs to export when implementing and the series-parallel connection mode, and in this embodiment, electric core 2 is equipped with 8, and this electric core 2 divide into four group's electric core group of establishing ties each other, and each electric core group comprises 2 electric cores 2 that connect in parallel each other.

The crimping plate 3 is provided with a plurality of spaced-apart support portions 31, the support portions 31 are made of an insulating material, and guide grooves 32 are formed between adjacent support portions 31. The notch 321 of the guiding groove 32 penetrates through the crimping plate 3 to form an interval gap between adjacent supporting parts 31, a plurality of trapezoidal or triangular guiding bars 322 are arranged in the guiding groove 32, the bottom of the guiding bar 322 is contacted with the notch 321 of the guiding groove 32, namely the intersection of the outer side part of the guiding bar 322 and the bottom of the guiding bar 322 is at the notch 321; in practice, the guiding bars 322 are preferably symmetrically distributed on both sides of the guiding slot 32. The accommodation groove 33 is formed at the lower end of the crimp plate 3, the accommodation groove 33 being formed by the lower end of the adjacent support portion 31, the accommodation groove 33 communicating with the guide groove 32. The notches 34 are provided at four corners of the crimping plate 3, and the opposite notches 34 are different so that the crimping plate 3 has a specific direction when mounted, specifically, the notches 34 correspond to the limiting posts 114 in the case 11. The pressing blocks 35 are made of metal materials and are arranged on the supporting parts 31 in a die-casting mode, the upper surfaces of the pressing blocks 35 are flush with the upper surfaces of the supporting parts 31, and two pressing blocks 35 which are spaced are arranged on each supporting part 31; the pressing block 35 is provided with four fixing holes 351, and the four fixing holes 351 are respectively located at four corners of the pressing block 35. In the present embodiment, two adjacent support portions 31 provided with the pressing pieces 35 are separated by one support portion 31 not provided with the pressing pieces 35 from one side of the pressure contact plate 3, and a structure of two, one and two is formed, where "two" means the support portion 31 provided with the pressing pieces 35, and "one" means the support portion 31 not provided with the pressing pieces 35.

Connecting plate 4 is provided with first connecting strip 41, second connecting strip 41', fixing support 42, circuit board 43, fixing seat 44, notch 45 and through hole 46. In this embodiment, there are two first string pieces 41 and three second string pieces 41 ', and the first string pieces 41 and the second string pieces 41' are made of a metal material, preferably aluminum. A first electrical connection pin 411, a first fixing through hole 412 and an electrode pin 413 are arranged on the first serial connection plate 41; two first electrical connection pins 411 and one electrode pin 413 are provided, and the first electrical connection pins 411 and the electrode pins 413 are respectively positioned at two sides of the first serial connection piece 41; the first fixing through holes 412 are arranged in groups, as shown in a rectangular frame in fig. 4, four first fixing through holes 412 which are longitudinally adjacent to each other in pairs are called a group, and two groups of first fixing through holes 412 are provided on each first string connecting piece 41. The second serial connection piece 41 ' comprises a second electrical connection pin 411 ' and a second fixing through hole 412 ', wherein four second electrical connection pins 411 ' are arranged and are respectively positioned at four corners of the second serial connection piece 41 '; the second fixing through holes 412' are arranged in groups in the same manner as the first fixing through holes 412; each second series of connecting pieces 41 'is provided with four sets of second fixing through holes 412'. In the present embodiment, the first string connecting piece 41 and the second string connecting piece 41 'are die-cast on the dash panel 4, and the outer surface of the first string connecting piece 41 and the outer surface of the second string connecting piece 41' are flush with the surface of the dash panel 4. In practice, two first connecting strips 41 are respectively located on two sides of one second connecting strip 41 ', which is opposite to another two second connecting strips 41' arranged adjacently, electrode pins 413 of the two first connecting strips 41 are located on the outer side, and the four electric core groups are connected in series by the position arrangement, the outer surfaces of the first connecting strips 41 and the second connecting strips 41 'are flush with the bottom surface of the connecting plate 4, and the first electric connecting pins 411 and the second electric connecting pins 411' are located in the connecting plate 4.

The fixing support legs 42 are respectively positioned at four corners of a rectangle to form a rectangular frame-shaped fixing area, and screw holes are formed in the fixing support legs 42 for fixing by screws; in the present embodiment, eight fixing legs 42 are provided in total, and two rectangular frame-shaped fixing regions can be formed.

The circuit board 43 is mounted at four corners to the fixing legs 42, and the circuit board 43 has through holes 431 for screws to pass through to fix the circuit board 43 to the fixing legs 42. The fixing base 44 is used for fixing the electrode. The notches 45 of the series connection plate are arranged at four corners of the series connection plate 4, and the opposite notches 45 are different, so that the series connection plate 4 has a specific direction when being installed. During the implementation, this circuit board 43 has two, all is provided with two the same protection circuit that charges on each circuit board 43, and each protection circuit that charges all inserts a electric core group in parallel for carry out the protection of charging to this electric core group.

The through holes 46 penetrate the dash panel 4, and the positions and the number of the through holes 46 correspond to the first fixing through holes 412 and the second fixing through holes 412 ', so that the screws or the fixing posts can penetrate the through holes 46 and the first fixing through holes 412 or the second fixing through holes 412 ' therebelow after the first string connecting piece 41 and the second string connecting piece 41 ' are mounted on the dash panel 4.

The shunt plate 5 is used for achieving shunt, the shunt plate 5 includes a non-metal substrate, a metal heat conducting plate located on one side of the non-metal substrate, and a sheet-shaped pattern resistor 51 located on the other side of the non-metal substrate, the pattern resistor 51 is formed by bending a sheet-shaped metal strip, the pattern resistor 51 includes a first contact end 511 and a second contact end 512, and current flowing through the pattern resistor 51 flows in from the first contact end 511 and flows out from the second contact end 512, or flows in from the second contact end 512 and flows out from the first contact end 511. In order to facilitate the electrical connection of the first contact terminal 511, two first contact points 5111 are provided at the first contact terminal 511; to facilitate the electrical connection of the second contact terminal 512, two second contact points 5121 are provided at the second contact terminal 512. The shunting plate 5 is installed in the opening groove 522 of the heat dissipation plate 52, and the metal heat conduction plate is attached to the opening groove 522. When the current flows through the pattern resistor 51 of the shunt 5, the heat generated by the pattern resistor 51 is transferred to the heat dissipation plate 52 through the non-metal substrate and the metal heat conduction plate, and is dissipated through the heat dissipation plate 52 and the heat dissipation fins 521 thereon. In practice, on one side of the pattern resistor 51, except for the first contact point 5111 and the second contact point 5121, the remaining portion is coated with a black insulating layer.

The electrode 6 is in a stepped column shape, the stepped part of the electrode 6 is sleeved with a rubber sleeve 61, and the rubber sleeve 61 has elasticity and can generate certain deformation. The bottom of the electrode 6 is provided with a connection hole 62, and the electrode 6 is fixed and electrically connected through the connection hole 62.

The number of the slots 111, the supporting parts 31, the guiding grooves 32 and the accommodating grooves 33 in the battery box 1 is the same, and the slots 111 are arranged opposite to the accommodating grooves 33; the notch 34, the notch 45 and the limit post 114 are arranged in a matching way. The battery cells 2 are arranged in the slots 111, from one side of the box body 11, the two adjacent slots 111 are inserted with the battery cells 2, one slot 111 is left, and the battery cells 2 are inserted in the two adjacent slots 111 to form a two-in-one-two distribution structure. Here, "two" indicates two adjacent slots 111 into which the battery cells 2 are inserted, and "one" indicates a slot 111 into which the battery cells 2 are not inserted. The box body 11 is provided with the compression joint plate 3, the installation direction of the compression joint plate 3 is determined by the matching of the notch 34 and the limiting column 114, the stopper 113 supports the edge of the compression joint plate 3, and the tab 21 of the battery cell 2 is guided by the guiding strip 322 in the guiding groove 32 to penetrate through the notch 321; the lower end and the side end of the battery cell 2 are both located in the slot 111, the upper end of the battery cell 2 is located in the accommodating groove 33, and the tab 21 is bent and then attached to the pressing block 35 on the supporting portion 31. When the battery cell is applied, the battery cells 2 are expanded due to heat generated by energization, and the expanded parts are located in the hollow parts of the baffles 112 and the spaces corresponding to the vacant slots 111, so that extrusion between the battery cells 2 is prevented.

The series connection plate 4 is arranged in the box body 11, the installation direction of the series connection plate 4 is determined by the matching of the notch 45 and the limiting column 114, the first series connection sheet 41 and the second series connection sheet 41 ' of the series connection plate 4 are abutted against the surface of the tab 21, a screw or other fixing column is used to penetrate through the through hole 46 of the series connection plate 4 and the first fixing through hole 412 or the second fixing through hole 412 ' corresponding to the through hole 46 to be screwed into or inserted into the fixing hole 351 of the pressing block 35, and the tab 21 is abutted against the pressing block 35 by the first series connection sheet 41 and the second series connection sheet 41 ', so that the fixed connection of the electric core 2, the pressing plate 3 and the series connection plate 4 is realized; the tab 21 is located between the screws or other fixing columns, and is not in contact with the screws or other fixing columns, so that the contact resistance of the tab 21 and the first series connecting sheet 41 and the second series connecting sheet 41' has good consistency. The heat radiating plate 52 is inserted into the insertion groove 115 on the side of the case 11, and the heat radiating fins 521 face the outside of the case 11.

The electrode 6 is fixedly mounted on the electrode pin 413 of the first serial tab 41, specifically, the electrode 6 is placed on the top surface of the electrode pin 413 of the first serial tab 41 through the fixing base 44, the connecting hole 62 at the bottom of the electrode 6 is aligned with the through hole 4131 on the electrode pin 413, and a screw or other fixing column is screwed or fixed into the connecting hole 62 from the bottom surface of the electrode pin 413 through the through hole 4131. The rubber sleeve 61 is sleeved on the electrode 6, the box cover 12 is arranged on the box body 11 in a covering mode, the upper end of the electrode 6 is exposed out of the electrode through hole 122, and the rubber sleeve 61 is clamped between the electrode through hole and the electrode 6, so that the box cover 12 and the electrode 6 can be sealed, and hard contact between the electrode 6 and the box cover 12 can be avoided.

In implementation, referring to fig. 7 again, in this fig. 7, the positional relationship between the first string tab 41, the second string tab 41' and the tab 21 is shown, the battery cell 2 is divided into four ABCD (not shown in the figure) battery core groups, each of which includes two battery cells connected in parallel, respectively, battery cell a1 and battery cell a2, battery cell B1 and battery cell B2, battery cell C1 and battery cell C2, battery cell D1 and battery cell D2 (neither shown in fig. a1 and a2, nor shown in fig. B1 and B2, nor shown in fig. C1 and C2, nor shown in fig. D1 and D2). The first string tab 41 includes a first string tab E + and a first string tab E-, and the second string tab 41' includes a second string tab F1, a second string tab F2, and a second string tab F3. The tab A1+ corresponding to the positive electrode of the battery cell A1 and the tab A2+ corresponding to the positive electrode of the battery cell A2 are both in contact with the first series connecting piece E +, and the tab A1+ and the tab A2+ are electrically connected through the first series connecting piece E +. The tab A1-corresponding to the negative electrode of the battery cell A1 and the tab A2-corresponding to the negative electrode of the battery cell A2 are both contacted with the second serial connection plate F1, and the tab A1-is electrically connected with the tab A2-through the second serial connection plate F1; a tab B1+ corresponding to the positive electrode of the battery cell B1 and a tab B2+ corresponding to the positive electrode of the battery cell B2 are both contacted with a second serial connection plate F1, and the electrical connection between the tab B1+ and the tab B2+ is realized through the second serial connection plate F1; and electrically connects tab a1 "and tab a 2" with tab B1+ and tab B2+ via a second series of tabs F1. A tab B1-corresponding to the negative electrode of the battery cell B1 and a tab B2-corresponding to the negative electrode of the battery cell B2 are both contacted with a second series connection plate F2, and the electrical connection of a tab B1-and a tab B2-is realized through the second series connection plate F2; the tab C1+ corresponding to the positive electrode of the battery cell C1 and the tab C2+ corresponding to the positive electrode of the battery cell C2 are both in contact with the second serial connection plate F2, and the electrical connection between the tab C1+ and the tab C2+ is realized through the second serial connection plate F2; and electrically connects tab B1 "and tab B2" with tab C1+ and tab C2+ via a second series of tabs F2. The tab C1-corresponding to the negative electrode of the battery cell C1 and the tab C2-corresponding to the negative electrode of the battery cell C2 are both contacted with the second serial connection plate F3, and the tab C1-is electrically connected with the tab C2-through the second serial connection plate F3; the tab D1+ corresponding to the positive electrode of the battery cell D1 and the tab D2+ corresponding to the positive electrode of the battery cell D2 are both in contact with the second serial connection plate F3, and the electrical connection between the tab D1+ and the tab D2+ is realized through the second serial connection plate F3; and tab C1 "and tab C2" are electrically connected to tab D1+ and tab D2+ via a second series of tabs F3. The tab D1-corresponding to the negative electrode of the battery cell D1 and the tab D2-corresponding to the negative electrode of the battery cell D2 are both in contact with the first series connecting piece E-, and the tab D1-and the tab D2-are electrically connected through the first series connecting piece E-. Through the above manner, the battery cell a1 and the battery cell a2 are connected in parallel, the battery cell B1 and the battery cell B2 are connected in parallel, the battery cell C1 and the battery cell C2 are connected in parallel, the battery cell D1 and the battery cell D2 are connected in parallel, the battery core group a, the battery core group B, the battery core group C and the battery core group D are connected in series, and the first connecting piece E + and the first connecting piece E-are respectively used as the positive pole and the negative pole of the battery cells after being connected in series.

The four charging protection circuits on the two circuit boards 43 are electrically connected to a cell group through the first electrical connection pins 411 and/or the second electrical connection pins 411', and the number of the shunting pieces 5 is four, and the four charging protection circuits are electrically connected to a charging protection circuit through the first contact point 5111 and the second contact point 5121. When charging, a core group charges and accomplishes the back, and the protection circuit that charges makes the 5 electricity connection of branch flow sheet that this core group corresponds insert the circuit that charges and form, avoids this core group overcharge.

When in installation, the base 13 is arranged on the box body 11; arranging the battery cell 2 in the manner described above, guiding the tab 21 to penetrate through the notch 321 through the guide groove 32 of the compression plate 2, and bending and attaching the tab 21 to the pressing block 35 on the supporting portion 31; the electrode 6 is fixedly arranged on the first series connecting sheet 41 of the series connecting plate 4 through the fixed seat 44; the series connection plate 4 is abutted against the compression connection plate 2, so that the notch 34 of the compression connection plate 3 is consistent with the notch 45 of the series connection plate 4, and a screw or other fixing column is adopted to pass through the through hole 46, the first fixing through hole 412 or the second fixing through hole 412 ' to be screwed into or fixed in the fixing hole 351, so that the series connection plate 4 is fixedly installed on the compression connection plate 3, the tab 21 is positioned between the first series connection piece 41 or the second series connection piece 41 ' and the pressing block 35, and the tab 21 is electrically connected with the first series connection piece 41 and the second series connection piece 41 '. Through the above, the battery cell 2, the compression joint plate 3, the serial connection plate 4 and the electrode 6 are fixedly connected together, and the shunting sheet 5 is electrically connected with the circuit board 43 and then inserted into the insertion groove 115; the battery cell 2 is placed in the slot 111 of the box body 11, the notch 34 of the compression joint plate 3 and the notch 45 of the series connection plate 4 are matched with the limiting column 114 to determine the installation direction, and the stopper 113 supports the edge of the compression joint plate 3. And covering the box cover 12 on the box body 11, exposing the electrode 6 from the electrode through hole 122, and locking the electrode 6 into a threaded hole (not shown) on the limiting column 114 of the box body 11 by using a screw or a stud to penetrate through the through hole 123 so as to fix the box cover 12 on the box body 11, thereby completing the installation of the automobile starting battery.

As shown in fig. 8 and 9, a schematic block diagram of an embodiment of a charging protection circuit in an automobile starting battery according to the present invention includes a plurality of electric core groups ABCD connected in series and a charging protection circuit 10 connected in parallel with each electric core group. The number of the cells of each battery pack can be one or more, and when the number of the cells of the cell pack is multiple, the batteries of each cell pack can be connected in parallel or in series. In the present embodiment, the number of the cells of each cell group is 2, and the two cells are connected in parallel. The cell group a at the head end and the cell group D at the tail end are connected with the charging device 100 during charging.

The battery protection circuit comprises an overvoltage detection circuit 101, an overvoltage protection driving circuit 102, a transistor switch circuit 103, a voltage stabilizing circuit 104, an overvoltage protection prompting circuit 105 and a reverse connection protection prompting circuit 106, wherein the overvoltage detection circuit 101 is used for being connected with a battery so as to detect the voltage of the battery core of the corresponding battery core group. The overvoltage protection driving circuit 102 is connected to the overvoltage detection circuit 101, and is configured to send a driving signal when the overvoltage detection circuit 101 detects that the voltage of the battery cell is greater than a preset value.

The transistor switch circuit 103 is configured to be connected to a load, the overvoltage protection prompting circuit 105, and a signal output end of the overvoltage protection driving circuit 102, so as to discharge electric energy for charging the battery cell according to the driving signal. The voltage stabilizing circuit 104 is used for being connected with the positive electrode of the battery cell, the overvoltage protection prompting circuit 105 and the reverse connection protection prompting circuit 106, the overvoltage protection prompting circuit 105 is used for being electrically connected with the positive electrode of the battery cell and the transistor switch circuit 103, the signal input end of the reverse connection protection prompting circuit 106 is grounded, and the signal output end of the reverse connection protection prompting circuit 106 is electrically connected with the voltage stabilizing circuit 104. In this embodiment, the positive connection terminal VBAT is connected to the positive electrode of the battery cell, and the LOAD is connectable through the LOAD connection terminal LOAD.

The overvoltage detection circuit 101 comprises a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, a first end of the first resistor R1 is used for being connected with the anode of the battery, a first end of the second resistor R2 is connected with a second end of the first resistor R1, a first end of the third resistor R3 is connected with a second end of the second resistor R2 and the overvoltage protection driving circuit 102, a first end of the fourth resistor R4 is connected with a second end of the third resistor R3, and a second end of the fourth resistor R4 is grounded. Through the matching of a plurality of resistors, the design and production are convenient.

The overvoltage protection driving circuit 102 includes a comparator U, a fifth resistor R5, and a first capacitor C1, wherein a non-inverting input terminal of the comparator U is connected to a first terminal of a third resistor R3 in the overvoltage detection circuit 1. The inverting input terminal of the comparator U is connected to the first terminal of the first capacitor C1, the output terminal of the comparator U is electrically connected to the transistor switch circuit 3, and the second terminal of the first capacitor C1 is grounded. The first end of the fifth resistor R5 is used for being connected with the anode of the battery, and the second end of the fifth resistor R5 is connected with the inverting input end of the comparator U.

The overvoltage protection driving circuit 102 further includes a thyristor T, a control electrode of the thyristor T is connected to the first end of the second capacitor C2, an anode of the thyristor T is grounded, and a cathode of the thyristor T is electrically connected to the inverting input terminal of the comparator U. Through the matching of the thyristor T and the first capacitor C1, the output signal of the overvoltage protection driving circuit 102 is not easily affected by the battery voltage, and the stability is improved.

The overvoltage protection driving circuit 102 further includes a sixth resistor R6 and a seventh resistor R7, a first end of the sixth resistor R6 is connected to the non-inverting input terminal of the comparator U, a second end of the sixth resistor R6 is electrically connected to a first end of the seventh resistor R7, and a second end of the seventh resistor R7 is connected to the output terminal of the comparator U. The sixth resistor R6 and the seventh resistor R7 have the function of voltage feedback.

The voltage stabilizing circuit 104 comprises a first zener diode D1, a second zener diode D2, a second capacitor C2 and an eighth resistor R8, wherein the anode of the first zener diode D1 is connected with the power supply cathode connection end of the comparator U, and the cathode of the first zener diode D1 is grounded. When the voltage of the battery is normal and the connection is correct, the first zener diode D1 is turned on. The anode of the second zener diode D2 is connected to the signal output terminal of the reverse connection protection prompting circuit 106, and the cathode of the second zener diode D2 is used to connect to the anode of the battery. The second capacitor C2 is connected in parallel with the second zener diode D2, a first end of the eighth resistor R8 is connected to the signal output end of the reverse connection protection prompting circuit 106, and a second end of the eighth resistor R8 is grounded.

The overvoltage protection prompting circuit 105 comprises a first light emitting diode D3 and a ninth resistor R9, an anode of the first light emitting diode D3 is connected with a first end of the ninth resistor R9, a cathode of the first light emitting diode D3 is connected with the transistor switch circuit 103, and a second end of the ninth resistor R9 is used for being electrically connected with an anode of the power supply.

The reverse connection protection prompting circuit 106 comprises a second light emitting diode D4 and a tenth resistor R10, wherein an anode of the second light emitting diode D4 is connected with a first end of the tenth resistor R10, a cathode of the second light emitting diode D4 is connected with an anode of the second voltage stabilizing diode D2, and a second end of the tenth resistor R10 is grounded. In the assembling process, if the battery is reversely connected, the second light emitting diode D4 emits light, the second voltage stabilizing diode D2 is conducted, and the current is led out, so that the components are well protected from being damaged. The circuit is ingenious in design, simple in structure and low in cost, and can well prompt a user, so that the user experience is high.

The transistor switch circuit 103 comprises a field effect transistor, a drain of the field effect transistor is used for connecting with the load, a source of the field effect transistor is grounded, and a gate of the field effect transistor is electrically connected to an output end of the comparator U. In the present embodiment, the fets include a first fet Q1, a second fet Q2, and a third fet Q3. The transistor switch circuit 103 is connected to the pattern resistor 51 of the shunt 5, so that when the voltage of the battery cell reaches the preset value, the current charged in the battery cell group is drained through the pattern resistor 51.

When the overvoltage detection circuit 101 detects that the voltage of the battery is greater than a preset value, the comparator U outputs a high level signal, the first light emitting diode D3 emits light, the first field effect transistor Q1, the second field effect transistor Q2 and the third field effect transistor Q3 are turned on, a current flows through the pattern resistor 51, and the pattern resistor 51 generates heat, so that excessive electric energy can be released. The first light emitting diode D3 emits light to prompt the user, so that the safety can be improved. In addition, the temperature of the battery can be maintained between 50 and 60 ℃ during charging, so that the charging effect is good.

As shown in fig. 10, a schematic diagram of another embodiment of a charge protection circuit in a starting battery of an automobile is invented, and the structure of this embodiment is similar to that of the embodiment shown in fig. 9, and the main differences are as follows: the embodiment further includes a voltage boost circuit 107 and a locking circuit 108, where the voltage boost circuit 107 is connected to the overvoltage protection driving circuit 102, and is configured to boost a voltage signal output by the overvoltage protection driving circuit 102 to a preset value. The locking circuit 108 is connected to the boosting circuit 107 and the transistor switch circuit 103, and is configured to lock a switching state of the transistor switch circuit 103, that is, when each group of electric core groups is fully charged, the group of electric core groups is kept from being charged, so as to better protect the electric cores from being affected by a voltage magnitude at a charging device end in a charging process.

The boost circuit 107 comprises a boost chip M, an inductor L, a third capacitor C3, a fourth capacitor C4, a third zener diode D5, an eleventh resistor R11 and a twelfth resistor R12, wherein a first end of the inductor L is electrically connected with the voltage stabilizing circuit 104 and a fifth pin of the boost chip M, a second end of the inductor L is connected with an anode of the third zener diode D5 and the first pin of the boost chip M, a first end of the third capacitor C3 is electrically connected with the fourth pin of the boost chip M and the voltage stabilizing circuit 104, and a second end of the third capacitor C3 is grounded. A first end of the fourth capacitor C4 is connected with a cathode of the third zener diode D5, and a second end of the fourth capacitor C4 is grounded; a first end of the eleventh resistor R11 is connected to a cathode of the third zener diode D5, a second end of the eleventh resistor R11 is connected to a first end of the twelfth resistor R12, a first end of the twelfth resistor R12 is connected to the third pin of the boost chip M, and a second end of the twelfth resistor R12 is grounded. In this embodiment, the voltage can be raised to 12 volts, and the circuit has the advantage of stable and reliable output voltage. It is understood that the type of the boost chip may be selected according to the requirement, and is not particularly limited herein.

The locking circuit 108 includes a first triode Q4, a second triode Q5, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16 and a seventeenth resistor R17, wherein a base of the first triode Q4 is connected to a first end of the thirteenth resistor R13 and a first end of the fourteenth resistor R14, a collector of the first triode Q4 is connected to a first end of the fifteenth resistor R15, and an emitter of the first triode Q4 is grounded. A second terminal of the thirteenth resistor R13 is connected to the signal output terminal of the overvoltage protection driving circuit 2, and a second terminal of the fourteenth resistor R14 is grounded.

A base of the second transistor Q5 is connected to a first end of the sixteenth resistor R16 and a second end of the fifteenth resistor R15, a collector of the second transistor Q5 is connected to a first end of the seventeenth resistor R17 and the transistor switch circuit 103, and an emitter of the second transistor Q5 is connected to a second end of the sixteenth resistor R16 and a cathode of the third zener diode D5. A second end of the seventeenth resistor R17 is grounded. The latch circuit 108 latches, and thus the state of the transistor switch circuit 103 can be stably controlled to protect the battery better.

Through the cooperation of the overvoltage detection circuit 101, the overvoltage protection driving circuit 102, the transistor switch circuit 103, the voltage stabilizing circuit 104, the overvoltage protection prompting circuit 105 and the reverse connection protection prompting circuit 106, when the overvoltage detection circuit 101 monitors that the charging voltage of the battery is too large, the overvoltage protection driving circuit 102 drives the transistor switch circuit 103 to be opened, so that at least part of the charging current is released from the transistor switch circuit 103 and is prompted, and therefore charging safety is guaranteed, and humanization is achieved. By arranging the splitter plate, electric energy can be better converted into heat energy to be released through the splitter plate when overvoltage occurs, and overheating of a circuit is avoided; in the assembling process, when the battery core is reversely connected, the reverse connection protection prompting circuit 106 is used for reverse connection protection and prompting, so that the misassembly is avoided, and the installation efficiency is improved.

The automobile starting battery provided by the invention is described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, the present disclosure is only an embodiment of the present disclosure, and not intended to limit the scope of the present disclosure, and all equivalent structures or equivalent flow transformations made by using the present disclosure and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present disclosure, and should not be construed as limiting the present disclosure.

Claims

1. An automobile starting battery, comprising:

the battery cores are divided into a plurality of battery core groups;

and an electrode;

2. The automobile starting battery according to claim 1, wherein the charging protection circuit comprises an overvoltage detection circuit, an overvoltage protection driving circuit, a transistor switching circuit, a voltage stabilizing circuit, an overvoltage protection prompting circuit and a reverse connection protection prompting circuit, and the overvoltage detection circuit is used for being connected with the cells of the cell group to detect the voltage of the cells; the overvoltage protection driving circuit is connected with the overvoltage detection circuit and is used for sending a driving signal when the overvoltage detection circuit detects that the voltage of the battery cell is greater than a preset value;

3. The battery of claim 2, wherein the overvoltage detection circuit comprises a first resistor, a second resistor, a third resistor, and a fourth resistor, a first end of the first resistor is connected to the positive electrode of the battery, a first end of the second resistor is connected to a second end of the first resistor, a first end of the third resistor is connected to a second end of the second resistor and the overvoltage protection driving circuit, a first end of the fourth resistor is connected to a second end of the third resistor, and a second end of the fourth resistor is grounded.

4. The automobile starting battery according to claim 2 or 3, wherein the overvoltage protection driving circuit comprises a comparator, a fifth resistor and a first capacitor, a positive phase input terminal of the comparator is connected with the overvoltage detection circuit, a negative phase input terminal of the comparator is connected with a first terminal of the first capacitor, an output terminal of the comparator is electrically connected with the transistor switch circuit, and a second terminal of the first capacitor is grounded; and the first end of the fifth resistor is used for being connected with the anode of the battery, and the second end of the fifth resistor is connected with the inverting input end of the comparator.

5. The vehicle starting battery according to claim 4, wherein the overvoltage protection driving circuit further comprises a thyristor, a control electrode of the thyristor is connected to the first end of the second capacitor, an anode of the thyristor is grounded, and a cathode of the thyristor is electrically connected to the inverting input terminal of the comparator.

6. The battery of claim 4, wherein the over-voltage protection driving circuit further comprises a sixth resistor and a seventh resistor, a first end of the sixth resistor is connected to the non-inverting input terminal of the comparator, a second end of the sixth resistor is electrically connected to a first end of the seventh resistor, and a second end of the seventh resistor is connected to the output terminal of the comparator.

7. The vehicle starting battery according to claim 4, wherein the regulator circuit comprises a first zener diode, an anode of the first zener diode is connected to the power supply negative connection terminal of the comparator, and a cathode of the first zener diode is grounded.

8. The automobile starting battery according to claim 7, wherein the voltage stabilizing circuit further comprises a second zener diode, a second capacitor and an eighth resistor, wherein an anode of the second zener diode is connected to the signal output terminal of the reverse connection protection prompting circuit, and a cathode of the second zener diode is used for being connected to the anode of the battery; the second capacitor is connected with the second voltage stabilizing diode in parallel, the first end of the eighth resistor is connected with the signal output end of the reverse connection protection prompting circuit, and the second end of the eighth resistor is grounded.

9. The automobile starting battery according to claim 2, wherein the automobile starting battery with the charge protection function further comprises a voltage boosting circuit and a locking circuit, wherein the voltage boosting circuit is connected with the overvoltage protection driving circuit and is used for boosting a voltage signal output by the overvoltage protection driving circuit to a preset value; the locking circuit is connected with the boosting circuit and the transistor switch circuit and used for locking the switching state of the transistor switch circuit.

10. The automobile starting battery according to claim 9, wherein the boost circuit comprises a boost chip, an inductor, a third capacitor, a fourth capacitor, a third zener diode, an eleventh resistor and a twelfth resistor, a first end of the inductor is electrically connected to a voltage regulator circuit and a fifth pin of the boost chip, a second end of the inductor is connected to an anode of the third zener diode and a first pin of the boost chip, a first end of the third capacitor is electrically connected to a fourth pin of the boost chip and the voltage regulator circuit, and a second end of the third capacitor is grounded; the first end of the fourth capacitor is connected with the cathode of the third voltage stabilizing diode, and the second end of the fourth capacitor is grounded; a first end of the eleventh resistor is connected with a cathode of the third zener diode, a second end of the eleventh resistor is connected with a first end of the twelfth resistor, a first end of the twelfth resistor is connected with a third pin of the boost chip, and a second end of the twelfth resistor is grounded;