Utility model content
The purpose of this utility model is to provide a kind of battery packs for being capable of providing two different output voltages and electronic
Tool system.
To realize above-mentioned purpose of utility model, the utility model provides a kind of battery pack comprising the first battery core group, the
Two battery core groups and four electrode terminals being electrically connected respectively with the positive electrode and negative electrode of two battery core groups, it is characterised in that: described
Four electrode terminals include two fixing terminals for being set to two variable terminals of centre and being set to outside;Two convertible tips
Sub to be connected from two electrodes of different battery core groups, two fixing terminals are connected with remaining two electrodes of two battery core groups;Institute
Stating tool between two variable terminals, there are two types of the states of mechanical connection, and two battery core groups are serially connected to export in the first state
High pressure, two battery core groups are parallel with one another to export low pressure in a second state.
Two variable terminals electrode different with two battery core group polarity respectively as a further improvement of the utility model,
It is connected, two variable terminals are connected with each other under the first state, and two variable terminals mutually disconnect under second of state.
Two variable terminals are normally open as a further improvement of the utility model, logical both under the first state
A switching conductive sheet is crossed to be connected.
Two variable terminals are normally off as a further improvement of the utility model, logical both under second of state
An external insulation inserted sheet is crossed to disconnect.
As a further improvement of the utility model, under the first state two fixing terminals as battery pack it is total just with
Total bear is docked with electric tool.
As a further improvement of the utility model, under second of state, the identical electrode phase with two battery core group polarity
Even fixing terminal and variable terminal with it is same dock public affairs blade contact.
The electrode terminal being connected as a further improvement of the utility model, with the first battery core group positive and negative anodes is the first anode
Terminal and the first negative terminal, the electrode terminal being connected with the second battery core group positive and negative anodes are the second positive terminal and the second negative pole end
Son, arrangement is followed successively by the second negative terminal, the first negative terminal, the second positive terminal and the first positive terminal in battery pack
Son, wherein the second negative terminal and the first positive terminal are fixing terminal, the first negative terminal and the second positive terminal are variable
Terminal.
Two variable terminals electrode identical with two battery core group polarity respectively as a further improvement of the utility model,
It is connected, two variable terminals mutually disconnect under the first state;Two variable terminals are connected with each other under second of state.
Two variable terminals are normally open as a further improvement of the utility model, under second of state two can
Become terminal and docks public blade contact with same.
Two variable terminals are normally off as a further improvement of the utility model, logical both under the first state
An insulation inserted sheet is crossed to disconnect.
One of them variable terminal is solid by a switching conductive sheet and one as a further improvement of the utility model,
Fixed end is connected, and the variable terminal being connected and fixing terminal are connected from different battery core groups respectively.
The electrode terminal being connected as a further improvement of the utility model, with the first battery core group positive and negative anodes is the first anode
Terminal and the first negative terminal, the electrode terminal being connected with the second battery core group positive and negative anodes are the second positive terminal and the second negative pole end
Son, arrangement is followed successively by the second positive terminal, the first negative terminal, the second negative terminal and the first positive terminal, wherein second
Positive terminal and the first positive terminal are fixing terminal, and the first negative terminal and the second negative terminal are variable terminal.
Four electrode terminals are arranged in a row as a further improvement of the utility model, and two variable terminals are neighbouring
Setting.
Two fixing terminal structures are identical as a further improvement of the utility model, and two fixing terminals are respectively provided with
A pair of of contact arm;Fixing terminal is different from variable terminal structure.
Two variable terminals are single contact arm configuration as a further improvement of the utility model, and the two is normally open.
Two variable terminals are respectively provided with a pair of main contact arm as a further improvement of the utility model, and one flanks
Contact arm, it is normally off that two, which flank contact arm,.
The battery pack further includes being respectively arranged on outside four electrode terminals as a further improvement of the utility model,
The communication terminal and charging terminal of side, the communication terminal and the structure of the charging terminal and the structure phase of the fixing terminal
Together.
The utility model additionally provides a kind of electric tool system comprising electric tool and the electricity connecting with electric tool
Chi Bao, the battery pack are battery pack above-mentioned, and the electric tool is equipped with the male plug part that cooperates with the battery pack, two
Variable terminal changes mechanical connection state by cooperating with male plug part.
As a further improvement of the utility model, when two variable terminals electricity different with two battery core group polarity respectively
Extremely it is connected, and when being therebetween normally open, the male plug part on electric tool is the first male plug part, is received from battery pack high
Pressure, and have there are three the first male plug piece, three the first male plug pieces successively cooperate with communication terminal and two fixing terminals, and described turn
It connects conductive sheet to be arranged on the first male plug part, three first male plug pieces electrically connect with battery pack and electric tool simultaneously
It connects, the switching conductive sheet is only electrically connected with the variable terminal of battery pack.
As a further improvement of the utility model, when two variable terminals electricity different with two battery core group polarity respectively
Extremely it is connected, and when being therebetween normally open, the male plug part on electric tool is the second male plug part, is received from battery pack low
Pressure, including three the second male plug pieces, one of them second male plug piece and communication terminal cooperate, other two the second male plug piece difference
Tool is there are two contact arm, the polarity of two contact arms of same second male plug piece battery core groups different from connecting in battery pack respectively
Identical fixing terminal and variable termination contact.
It is set between the adjacent contact arm of other two the second male plug piece as a further improvement of the utility model,
There is insulating trip.
As a further improvement of the utility model, when two variable terminals electricity different with two battery core group polarity respectively
Extremely it is connected, and when being therebetween normally off, the male plug part on electric tool is third male plug part, is received from battery pack low
Pressure, including three third male plug pieces;Wherein three third male plug pieces and communication terminal cooperate;Other two third male plug piece difference
For tool there are two contact arm, the polarity of two contact arms of same third male plug piece battery core groups different from connection simultaneously is identical solid
Fixed end and variable termination contact;The external insulation inserted sheet is arranged between other two described third male plug piece, and insulation is inserted
The length of piece projection be greater than third male plug piece, with battery pack cooperate when its at first with two variable termination contacts.
As a further improvement of the utility model, when two variable terminals electricity different with two battery core group polarity respectively
Extremely it is connected, and when being therebetween normally off, the male plug part on electric tool is the 4th male plug part, is received from battery pack high
Pressure, and have there are three the 4th male plug piece, three the 4th male plug pieces successively cooperate with communication terminal and two fixing terminals.
As a further improvement of the utility model, when two variable terminals electricity identical with two battery core group polarity respectively
Extremely it is connected, and when being therebetween normally open, the male plug part on electric tool is the 5th male plug part, is received from battery pack low
Pressure, including three the 5th male plug pieces;One of them the 5th male plug piece and communication terminal cooperate;In other two the 5th male plug piece,
Simultaneously with two variable termination contacts, another the 5th male plug piece connects with two fixing terminals simultaneously for one the 5th male plug piece
Touching.
As a further improvement of the utility model, when two variable terminals electricity identical with two battery core group polarity respectively
Extremely it is connected, and when being therebetween normally open, the male plug part on electric tool is the 6th male plug part, is received from battery pack high
Pressure, and have there are three the 6th male plug piece, the switching conductive sheet is arranged on the 6th male plug part, and switching is led when cooperating with battery pack
The electrode terminal different from different battery core group polarity is connected by electric piece, three the 6th male plug pieces respectively with communication terminal and remainder
Two electrode terminals cooperation.
Position on the 6th male plug part between corresponding two variable terminals as a further improvement of the utility model,
Equipped with insulating trip.
As a further improvement of the utility model, when two variable terminals electricity identical with two battery core group polarity respectively
Extremely it is connected, and when being therebetween normally off, the male plug part on electric tool is the 7th male plug part, is received from battery pack high
It presses, and the 7th male plug piece there are three tools, the switching conductive sheet and the insulation inserted sheet is equipped with simultaneously on the 7th male plug part, with electricity
The electrode terminal different from different battery core group polarity is connected by switching conductive sheet when Chi Bao cooperates, and external insulation inserted sheet is located at two
Between a variable terminal, three the 7th male plug pieces cooperate with communication terminal and remaining two electrode terminals respectively.
As a further improvement of the utility model, when two variable terminals electricity identical with two battery core group polarity respectively
Extremely it is connected, and when being therebetween normally off, the male plug part on electric tool is the 8th male plug part, is received from battery pack low
Pressure, including three the 8th male plug pieces;One of them the 8th male plug piece and communication terminal cooperate;In other two the 8th male plug piece,
Simultaneously with two variable termination contacts, another the 8th male plug piece connects with two fixing terminals simultaneously for one the 8th male plug piece
Touching.
The beneficial effects of the utility model are: the utility model battery pack includes two battery core groups and connects with two battery core groups
Four electrode terminals connect, in four electrode terminals setting there are two the variable terminal with different mechanical connection states, with
Make two battery core groups in being connected in series or in parallel, so that battery pack can provide two different output voltages;This is practical
The mating mechanical connection for switching variable terminal of male plug part and battery pack that novel electric tool system passes through electric tool
State, so that two groups of battery cores are in be connected in series or in parallel, to export corresponding output voltage.So set, increasing battery pack
With the scope of application of electric tool system, the compatibility of product is improved, use cost is reduced.
Specific embodiment
In order to keep the purpose of this utility model, technical solution and advantage clearer, with reference to the accompanying drawing and it is embodied
The utility model is described in detail in example.
Here, it should also be noted that, in order to avoid having obscured the utility model because of unnecessary details, in the accompanying drawings
It illustrate only the structure and/or processing step closely related with the embodiment of the utility model, and be omitted and the utility model
The little other details of relationship.
In addition, it should also be noted that, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.
Shown in please referring to Fig.1 to Fig.3, the utility model battery pack 100 is used to be electric tool offer power supply (not shown),
It includes shell 101, the first battery core group 102 being contained in shell 101, the second battery core group 103 and electrical with two battery core groups
The socket 110 of connection.Socket 110 includes ontology 104 and several conductive terminals being contained in ontology 104.Several conductive terminals
It is specially electric with first including four electrode terminals with the electric connection of the positive electrode and negative electrode of the first, second battery core group 102,103
The first connected positive terminal 111 of the positive and negative anodes of core group 102 and the first negative terminal 112, the positive and negative anodes with the second battery core group 103
Connected the second positive terminal 113 and the second negative terminal 114, the arrangement in battery pack 100 are followed successively by from left to right
Two negative terminals 114, the first negative terminal 112, the second positive terminal 113 and the first positive terminal 111, wherein the second negative pole end
Son 114 and the first positive terminal 111 are fixing terminal, and the first negative terminal 112 and the second positive terminal 113 are variable terminal.
Conductive terminal further includes the communication terminal 115 and charging terminal 116 being located on the outside of four electrode terminals.Particularly, by communication terminal
Son 115 and charging terminal 116 are provided separately, and can be prevented damage of the charging high pressure to battery pack, be extended the use of battery pack
Service life.
Four electrode terminals, communication terminal 115 and charging terminal 116 are set in a row, wherein the first negative terminal 112 and
Two positive terminals 113 are located at intermediate and are normally open, and the second negative terminal 114 and the first positive terminal 111 are set to outside.Such as
This is arranged so that two variable terminals are close to each other consequently facilitating switching mechanical connection state between the two.Second negative terminal
114, the first positive terminal 111, communication terminal 115 are identical with 116 structure of charging terminal, are respectively provided with a pair of of contact arm.First
Negative terminal 112 and the second positive terminal 113 are single contact arm configuration.
Two variable terminals i.e. the first negative terminal 112 and the second positive terminal 113 are selectable in disconnecting or connection two
The different mechanical connection state of kind, two battery core groups 102,103 are serially connected to export high pressure in the first state, second
Two battery core groups 102,103 are parallel with one another to export low pressure under kind state.It please join shown in Fig. 4 and Fig. 5, be the utility model battery
The conductive terminal of packet 100 is (not shown) with the feelings for merging output high pressure with the electric tool for being equipped with the first male plug part 120 docked
Shape.First male plug part 120 tool is there are four the first male plug piece 121,122,123,124 and a switching conductive sheet 125, and four first
Male plug piece 121,122,123,124 and a switching conductive sheet 125 are mounted on ontology 126.
Four the first male plug pieces 121,122,123,124 successively with 115, two i.e. the second cathode of fixing terminal of communication terminal
Terminal 114 and the cooperation of the first positive terminal 111 and charging terminal 116.Switching conductive sheet 125 is located at the first male plug piece 122,123
Between, when cooperating with battery pack 100 between two variable terminal the first negative terminals 112 of insertion and the second positive terminal 113
And be in contact with it, further the cathode of the first battery core group 102 is connected with the anode of the second battery core group 103, so by two
Battery core group is mutually contacted, and two fixing terminals i.e. the second negative terminal 114 and the first positive terminal 111 are used as battery pack 100
Total just negative connect with 120 property established of the first male plug part with total.It should be noted that three first of the first male plug part 120 are public
Inserted sheet 121,122,123 is electrically connected with battery pack 100 and electric tool simultaneously, and transfer conductive sheet 125 then only with battery pack
100 are electrically connected, and there is no be electrically connected with electric tool.
Charging terminal 116 is that battery pack 100 uses when connecting charging with external power supply, in battery pack 100 and electronic work
It is idle when tool connection, therefore only there is mechanical connection between charging terminal 116 and the first male plug piece 124, without
It is electrically connected, the cooperation of the first male plug piece 124 and charging terminal 116 can enhance between the first male plug part 120 and battery pack 100
Dock intensity.Correspondingly, three the first male plug pieces 121,122,123 can be only arranged in the first male plug part 120, and are not provided with
One male plug piece 124.Similarly, although the male plug part on electric tool disclosed below is equipped with the male plug with charging terminal cooperation
Piece, but for the utility model, each male plug part can be not provided with these male plug pieces and three docking male plug pieces are only arranged.
Please join shown in Fig. 6 and Fig. 7, for the utility model battery pack 100 conductive terminal with equipped with the second male plug for docking
The electric tool of part 130 is (not shown) to be cooperated to export the situation of low pressure.There are four the second male plug pieces for second male plug part 130 tool
131,132,133,134 and ontology 135.In use, four the second male plug pieces 131,132,133,134 and communication terminal 115, two
I.e. the first negative terminal 112 of 111, two variable terminals of a fixing terminal i.e. the second negative terminal 114 and the first positive terminal and
Second positive terminal 113 and charging terminal 116 cooperate.
Specifically, the second male plug piece 131,134 cooperates with communication terminal 115 and charging terminal 116 respectively.Second male plug piece
132,133 cooperate with two electrode terminals respectively, i.e., the second male plug piece 132 is negative with the second negative terminal 114 and first simultaneously
Extreme son 112 is engaged, and the second male plug piece 133 contacts and matches with the second positive terminal 123 and the first positive terminal 111 simultaneously
It closes.Two the second male plug pieces 132,133 are respectively provided with two contact arms 1321,1322,1331,1332, and same second
Two contact arms 1321,1322,1331,1332 of male plug piece 132,133 respectively with a variable terminal and a fixing terminal
It is connected, and due to the variable terminal and fixing terminal of the connection identical electrode phase with two battery core groups 102,103 polarity respectively
Even, to keep two battery core groups 102,103 parallel with one another, in this case, battery pack 100 exports low pressure.It is two adjacent to connect
It is equipped with insulating trip 136 between contact arm 1322,1331 and avoids short circuit.
It in the present embodiment, is normally opened between two variable terminals i.e. the first negative terminal 112 and the second positive terminal 113
State is led when electric tool receives high pressure from battery pack 100 by the switching being arranged on the first male plug part 120 of electric tool
Two variable terminals are connected by electric piece 125, and then two different electrodes of battery core group polarity are connected, and realize two battery cores
Group series connection, this is the first state.When electric tool receives low pressure from battery pack 100, two variable terminals i.e. the first cathode
State is maintained a normally open between terminal 112 and the second positive terminal 113, then will be with 103 pole of the first battery core group 102 and the second battery core group
Property a connected fixing terminal of identical electrode and a variable terminal simultaneously with the same male plug on the second male plug part 130
Piece contact, so that two battery core groups are connected in parallel, this is second of state.
Please join shown in Fig. 8 to 10, be the utility model battery pack embodiment two, it is different from previous embodiment one it
Place is only that the structure of conductive terminal.Six conductive terminals are arranged on the ontology 204 of socket comprising with the first, second electricity
Four electrode terminals that the positive electrode and negative electrode of core group 202,203 are electrically connected, are specially connected with 202 positive and negative anodes of the first battery core group
The first positive terminal 211 and the first negative terminal 212, the second positive terminal 213 for being connected with 203 positive and negative anodes of the second battery core group
And second negative terminal 214, arrangement are being followed successively by the second negative terminal 214, the first negative terminal 212, second just from left to right
Extreme son 213 and the first positive terminal 211, wherein the second negative terminal 214 and the first positive terminal 211 are fixing terminal, the
One negative terminal 212 and the second positive terminal 213 are variable terminal.It is arranged such and two variable terminals is placed on middle position,
Fixing terminal is placed on two side positions, so that two variable terminals are close to each other, and connecting or disconnecting convenient for both switchings,
To export different voltage under two kinds of mechanical connection states.Conductive terminal further includes being located at leading on the outside of four electrode terminals
Interrogate terminal 215 and charging terminal 216.
Four electrode terminals, communication terminal 215 and charging terminal 216 are arranged in a row.First negative terminal 212 and second
Positive terminal 213 is respectively provided with three contact arms, and three contact arms include a pair of main contact arm 2121,2131 and a side
Contact arm 2122,2132, it is the normally off to contact with each other that two, which flank contact arm 2122,2132,.When exporting high pressure, two are flanked
Contact arm 2122,2132 is in contact and is connected with each other two variable terminals, and two pairs of main contact arms 2121,2131 are vacant;It exports low
When pressure, two flank the insulation inserted sheet 225 (Figure 10) docked between contact arm 2122,2132 by one and disconnect.
Fig. 8 is that the third male plug part 220 in the conductive terminal and electric tool of the battery pack of the utility model cooperates output
The connection status of low pressure.Third male plug part 220 has there are four third male plug piece 221,222,223,224 and insulation inserted sheet 225, the
Three male plug pieces 221,222,223,224 and insulation inserted sheet 225 are mounted on ontology 226.Two third male plug pieces 221,224 are distinguished
Cooperate with communication terminal 215 and charging terminal 216.And third male plug piece 222,223 connects with two electrode terminals simultaneously respectively
Touching, wherein third male plug piece 222 is contacted with the main contact arm 2121 of the second negative terminal 214 and the first negative terminal 212 simultaneously,
Third male plug piece 223 cooperates with the main contact arm 2131 of the second positive terminal 213 and the first positive terminal 211 simultaneously.It needs
Bright, be not shown in Fig. 8 such as flowering structure: insulation inserted sheet 225 is located between two third male plug pieces 222,223, with electricity
Insulation inserted sheet 225 is inserted into the first negative terminal 212 and the second positive terminal 213 when Chi Bao cooperates two flank contact arm 2122,
It disconnects between 2132 to connect the two, further the cathode 203 of the second battery core group and the anode of the first battery core group 202 breaks
It opens, so by two battery core groups and company.The length of the projection of insulation inserted sheet 225 is greater than third male plug piece 221,222,223,224,
It is at first with two variable termination contacts so that the two disconnection, avoids that short circuit occurs when cooperating with battery pack.
It please join shown in Figure 11 to 12, the conductive terminal and the 4th male plug part 230 of the embodiment two of the utility model battery pack
The situation of cooperation output high pressure.It should be noted that though the variable terminal that can be changed in the structure and Fig. 8 of terminal in Figure 11 slightly has not
Together, but from the perspective of the utility model, the two is substantially identical.4th male plug part 230 include four the 4th male plug pieces 231,
232,233,234 and ontology 235.4th male plug piece 231,234 cooperates with communication terminal 215 and charging terminal 216 respectively.And the
Four male plug pieces 232,233 are contacted with the second negative terminal 214 and the first positive terminal 211 respectively.First negative terminal 212
The main contact arm 2131 of main contact arm 2121 and the second positive terminal 213 is vacant, and two flank contact arm 2122,2132 and are in contact,
The anode of second battery core group 203 is connect with the cathode of the first battery core group 202, so two battery core groups are contacted.
In the present embodiment, two variable terminals i.e. the first negative terminal 212 and the second positive terminal 213 are normally closed shape
State need to be disconnected when exporting low pressure by the inserted sheet 225 that insulate;When exporting high pressure, two flank contact arm 2122,2132 and are in contact
Normality is kept, two battery core groups 202,203 are serially connected.
In embodiment one and embodiment two, two variable terminals electrode phase different from different battery core group polarity respectively
Even, the variable terminal of the battery pack of the utility model is described below, and electrode identical with two battery core group polarity is connected respectively
Embodiment.
It please join shown in Figure 13 to 16, be the embodiment three of the utility model battery pack, wherein the structure and reality of conductive terminal
It applies that example one is identical, the difference is that only that the electrode of the battery core group of fixing terminal and the connection of variable terminal is different, i.e., two variable
Terminal electrode identical with two battery core group polarity is connected, fixing terminal electrode identical with two other two polarity of battery core group
It is connected.Specifically, please join shown in Figure 13,302 positive and negative anodes of the first battery core group are negative with the first positive terminal 311 and first respectively
Extreme son 312 is connected, the positive and negative anodes of the second battery core group 303 respectively with 314 phase of the second positive terminal 313 and the second negative terminal
Even.Arrangement of four electrode terminals in battery pack be followed successively by from left to right the second positive terminal 313, the first negative terminal 312,
Second negative terminal 314 and the first positive terminal 311.Wherein the second negative terminal 314 and the first negative terminal 312 are convertible tip
Son, the second positive terminal 313 and the first positive terminal 311 are fixing terminal.Conductive terminal further includes being located at four electrode terminals
The communication terminal 315 and charging terminal 316 in outside.
It please join shown in Figure 14 and 15, be the battery pack and electric tool assembling output low pressure of the utility model embodiment three
State.There are four the 5th male plug pieces 321,322,323,324 for 5th male plug part 320 tool.When work, four the 5th male plug pieces 321,
322,323,324 with i.e. the second positive terminal 313 of 315, two fixing terminals of communication terminal and the first positive terminal 311, two
Variable terminal i.e. the second negative terminal 314, the first negative terminal 312 and charging terminal 316 have cooperation.Specifically, the 5th is public
Inserted sheet 321,324 cooperates with communication terminal 315 and charging terminal 316 respectively.5th male plug piece 322,324 is respectively simultaneously with two
The cooperation of a electrode terminal, i.e. the 5th male plug piece 322 have a pair of of contact arm 3221,3222 respectively with two fixing terminals i.e. second
Positive terminal 313 and the contact of the first positive terminal 311.5th male plug piece 323 only has its two sides of contact arm simultaneously with two
A variable terminal i.e. the second negative terminal 314 and the contact of the first negative terminal 312.Due to variable terminal and two battery core groups 302,
303 cathode is connected, and fixing terminal is connected with the anode of two battery core groups 302,303 respectively, thus make two battery core groups 302,
303 is parallel with one another, and in this case, battery pack exports low pressure.
Figure 16 is the battery pack of the utility model embodiment three and the situation of electric tool assembling output high pressure, the 6th male plug
There are four the 6th male plug piece 331,332,333,334 and a switching conductive sheets 335 for part tool.Electric tool makes with battery pack cooperation
Used time, switching conductive sheet 335 establish mechanical connection between the second positive terminal 313 and the first negative terminal 312, and then by two
The different electrode of a battery core group polarity i.e. cathode of the first battery core group 302 and the anode of the second battery core group 303 are electrically connected.And the
Six male plug pieces 331,334 cooperate with communication terminal 315, charging terminal 316 respectively, the 6th male plug piece 332 and the second negative terminal
314 contacts, the 6th male plug piece 333 are contacted with the first positive terminal 311.It to make two battery core groups be serially connected, and then is electricity
Power driven tools provide high pressure.Since the second negative terminal 314 and the first negative terminal 312 are single arm structure and close to each other, it is
Prevent the two from short circuit phenomenon occurs when exporting high pressure, it may be preferable that the 6th male plug part can also be in two the 6th male plug pieces 332,333
Insulation inserted sheet (not shown) that is equipped with both prevent from connecing electric connection.
In the present embodiment, two variable terminals i.e. the first negative terminal 312 and the second negative terminal 314 connect difference
The identical electrode of battery core group polarity, and be between the two normally open.When electric tool receives high pressure from battery pack, two can
Become between terminal i.e. the first negative terminal 312 and the second negative terminal 314 state that maintains a normally open, then passes through the 6th male plug part 330
Second positive terminal 313 is connected by the switching conductive sheet 335 of upper setting with the first negative terminal 312, and then by two battery cores
The different electrode of group polarity is connected, and realizes two battery core group series connection, this is the first state.When electric tool connects from battery pack
When receiving low pressure, two variable terminals i.e. the first negative terminal 312 and the second negative terminal 314 connect with the 6th male plug piece 323 simultaneously
Touching, the first positive terminal 311 and the second positive terminal 313 are contacted with the 6th male plug piece 322 simultaneously, thus simultaneously by two battery core groups
Connection connection.
It please join shown in Figure 17 to 20, be the example IV of the utility model battery pack, wherein the structure and reality of conductive terminal
It applies that example two is roughly the same, the difference is that only that the electrode of the battery core group of fixing terminal and the connection of variable terminal is different, i.e., two
Variable terminal electrode identical with two battery core group polarity is connected, and fixing terminal is identical with two other two polarity of battery core group
Electrode is connected.Specifically, please join shown in Figure 17,402 positive and negative anodes of the first battery core group respectively with the first positive terminal 411 and
One negative terminal 412 be connected, the positive and negative anodes of the second battery core group 403 respectively with the second positive terminal 413 and the second negative terminal 414
It is connected.Arrangement of four electrode terminals in battery pack is followed successively by the second positive terminal 413, the first negative terminal from left to right
412, the second negative terminal 414 and the first positive terminal 411.Wherein the second negative terminal 414 and the first negative terminal 412 be can
Become terminal, the second positive terminal 413 and the first positive terminal 411 are fixing terminal.Conductive terminal further includes being located at four electrodes
Communication terminal 415 and charging terminal 416 (Figure 18) on the outside of terminal.
It please join shown in Figure 18 and 19, when being the battery pack and electric tool assembling output high pressure of the utility model embodiment four
Structure.7th male plug part 420 includes four the 7th male plug pieces 421,422,423,424, switching conductive sheet 425, insulation inserted sheet
426 and ontology 427.7th male plug piece 421,424 cooperates with communication terminal 415 and charging terminal 416 respectively.7th male plug piece
422 contact with the main contact arm 4141 of the second negative terminal 414, and the 7th male plug piece 423 is contacted with the first positive terminal 411.Turn
Conductive sheet 425 is connect to be connected with the second positive terminal 413 with the main contact arm 4121 of the first negative terminal 412.Insulate inserted sheet 426
Two positioned at the first negative terminal 412 and the second negative terminal 414 flank between contact arm 4122,4142, the two are connected disconnected
It opens.By above-mentioned connection, two different electrodes of battery core group polarity are connected, realize two battery core group series connection.
Structure when Figure 20 is the battery pack and electric tool assembling output low pressure of the utility model embodiment four.8th is public
There are four the 8th male plug pieces 431,432,433,434 for the tool of plug-in unit 430.Wherein the 8th male plug piece 432 have a pair of of contact arm 4321,
4322.When work, four the 8th male plug pieces 431,432,433,434 and the i.e. second anode of 315, two fixing terminals of communication terminal
I.e. the second negative terminal 414 of 411, two variable terminals of terminal 413 and the first positive terminal, the first negative terminal 412 and charging
Terminal 316 has cooperation.
Specifically, the 8th male plug piece 431,434 cooperates with communication terminal 415 and charging terminal 416 respectively.8th male plug piece
432,433 cooperate with two electrode terminals simultaneously respectively, i.e. a pair of of contact arm 4321,4322 of the 8th male plug piece 432 is distinguished
It is contacted with two fixing terminals i.e. the second positive terminal 413 and the first positive terminal 411.8th male plug piece 433 only has one
Contact arm and its two sides are contacted with two variable terminals i.e. the second negative terminal 414 and the first negative terminal 412 simultaneously.Due to can
Become terminal to be connected with the cathode of two battery core groups 402,403, the fixing terminal positive phase with two battery core groups 402,403 respectively
Even, to keep two battery core groups 402,403 parallel with one another, in this case, battery pack exports low pressure.
In conclusion the utility model battery pack includes two groups of battery cores and four electrode terminals connecting with two groups of battery cores,
It is arranged in four electrode terminals there are two the variable terminal with different mechanical connection states, variable terminal can pass through docking
Male plug part on the switching conductive sheet, the insulation inserted sheet that are arranged change normally opened or normally off between the two so that two groups of electricity
Core is in be connected in series or in parallel under different conditions, so that battery pack can provide two different output voltages.
The switching conductive sheet and insulation inserted sheet of the utility model are arranged on the male plug part at electric tool end, wherein switching is led
Electric piece and electric tool only there is mechanical connection and without electric connection.The electric tool system of the utility model passes through electric tool
Male plug part and the mating mechanical connection state for switching variable terminal of battery pack so that two groups of battery cores are in serial or parallel connection company
State is connect, optionally output voltage to electric tool.So set, increasing being applicable in for battery pack and electric tool system
Range improves the compatibility of product, reduces use cost.
Above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although referring to preferred embodiment pair
The utility model is described in detail, those skilled in the art should understand that, it can be to the technology of the utility model
Scheme is modified or replaced equivalently, without departing from the spirit and scope of the technical scheme of the present invention.