CN100423322C - Battery pack - Google Patents
Battery pack Download PDFInfo
- Publication number
- CN100423322C CN100423322C CNB2005800014111A CN200580001411A CN100423322C CN 100423322 C CN100423322 C CN 100423322C CN B2005800014111 A CNB2005800014111 A CN B2005800014111A CN 200580001411 A CN200580001411 A CN 200580001411A CN 100423322 C CN100423322 C CN 100423322C
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- Prior art keywords
- circuit substrate
- battery
- secondary cell
- battery pack
- hush panel
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- 239000011347 resin Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract 3
- 239000000758 substrate Substances 0.000 claims description 67
- 239000003792 electrolyte Substances 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 210000004027 cell Anatomy 0.000 description 114
- 238000001816 cooling Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 238000007600 charging Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical group [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 210000000352 storage cell Anatomy 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
- Portable Power Tools In General (AREA)
Abstract
A battery cell is provided in which a plurality of secondary batteries (2) are held in conditions wherein the batteries are arranged in parallel at prescribed intervals by a center frame (7), a bottom side frame (8) and a terminal side frame (6). The secondary batteries (2) and a circuit board (3) are integrated by connecting the secondary batteries (2) in series and attaching the circuit board (3) to the terminal side frame (6). The circuit board (3) is molded with resin, and even when water or dusts enter from a vent for suppressing temperature increase of the secondary batteries, no trouble is generated at an electric circuit part of an battery pack. A connecting plate (9) is bonded to positive and negative electrode terminals which are formed on a sealing plate of a plurality of the secondary batteries (2) held by the terminal side frame (6) so as to connect the secondary batteries (2) in series, a connecting protruding part formed on each connecting plate (9) is inserted into a connecting hole so as to install the circuit board (3), and the secondary batteries (2) and the circuit board (3) are incorporated. Thus, wiring connection for connecting each of a plurality of the secondary batteries with the circuit board can be easily provided.
Description
Technical field
The present invention relates to be suitable as the battery pack of the battery supply of electric tools such as electronic drilling machine.
Background technology
Along with the high-power of electric tool, the battery pack that requires to constitute its battery supply can be exported bigger discharge power.In order to satisfy this requirement, what use at present is that a plurality of secondary cells are received into battery pack in the battery housing.But, because mostly electric tool be hand-held, so require the battery pack external form littler and weight is lighter.Normally used battery is cadmium-nickel storage cell or nickel-hydrogen accumulator, can not meet the demands fully aspect weight energy density and the volume energy density, and owing to causing battery weight to become big by a plurality of secondary cells, therefore existence makes the operability decline of electric tool or the problem of the battery thermal diffusivity that a plurality of batteries of intensive configuration cause.
Compare with above-mentioned cadmium-nickel storage cell and nickel-hydrogen accumulator, as weight energy density and the good secondary cell of volume energy density, we know nonaqueous electrolytic solution secondary batteries such as lithium rechargeable battery, if use these batteries to constitute battery pack, then can promote the miniaturization and of the battery pack of identical output power.This wherein compares with the situation of using cylindrical battery, if use the flat square lithium rechargeable battery then can constitute the good battery pack of space efficiency.
But; because the secondary cell of the use nonaqueous electrolytic solution that lithium rechargeable battery is such occurs easily owing to the aging and heating phenomenon of overcharging and overdischarge causes; so be necessary to be provided with battery protecting circuit and charge-discharge control circuit, together be accommodated in and constitute battery pack in the battery housing with constituting the circuit substrate of these circuit and secondary cell.As this secondary cell and circuit substrate are accommodated in the existing a plurality of motions of the battery pack that constitutes in the battery housing, as patent documentation 1 described battery pack etc.
But, under the situation of the battery pack that as the battery supply of electric tool, requires big electric power, owing to use a plurality of secondary cells, therefore exist each secondary cell is connected to connecting line construction complicated problems on the circuit substrate.And, use under the environment that dust, water droplet disperse because electric tool is many, so electric circuits such as circuit substrate partly also must have waterproof, protection against the tide, dustproof structure, require the structure that therefore the thermal diffusivity of secondary cell can not reduced or can not make the volume increase of battery pack.
Patent documentation 1: TOHKEMY 2001-313015 communique
Summary of the invention
Therefore, the object of the present invention is to provide a kind of be provided with the structure that connects a plurality of secondary cells and circuit substrate simply and make that it is integrated, also be provided with waterproof, the protection against the tide of electric circuit part simultaneously, the battery pack of dustproof construction.
For achieving the above object, battery pack of the present invention is that the secondary cell of a plurality of flat square and circuit substrate are accommodated in the battery pack that constitutes in the battery housing, the secondary cell of described flat square is sealed openend by pole plate group and electrolyte are accommodated in the battery can and with hush panel, and on above-mentioned hush panel, electrode terminal is set and constitutes, described circuit substrate constitutes the battery management circuit of the operating state of each secondary cell of management; The hush panel side that makes above-mentioned a plurality of secondary cells is same direction and keeps with framework, a plurality of secondary cells are become one, the foregoing circuit substrate is installed on the framework of the hush panel side that keeps a plurality of secondary cells, after being electrically connected between with circuit substrate and each secondary cell and input and output terminal, implement to cover required resin moulded (resin mold) of circuit substrate with resin.
According to said structure; because a plurality of secondary cells change into the interval that separates regulation between adjacent and the state that disposes side by side with the framework one; and circuit substrate is installed on the framework of the hush panel side that keeps secondary cell; therefore a plurality of secondary cells and circuit substrate are integrated; and on circuit substrate, implement resin moulded; so the anode and cathode terminals or the circuit substrate of each secondary cell are in isolation; cover by resin moulded; therefore even dust or moisture etc. immerse in the battery housing with ventilating opening exterior etc. from the cooling secondary cell is that use, also can the protective circuit part.
In addition, battery pack of the present invention is that a plurality of secondary cells and circuit substrate are accommodated in the battery pack that constitutes in the battery housing, described secondary cell is sealed openend by pole plate group and electrolyte are accommodated in the battery can and with hush panel, and on above-mentioned hush panel, electrode terminal is set and constitutes, described circuit substrate constitutes the battery management circuit of the operating state of each secondary cell of management; The hush panel side that makes above-mentioned a plurality of secondary cells is same direction and uses frame fixation, connecting plate is joined on the electrode terminal of each secondary cell, make a plurality of secondary cells connect and/or be connected in parallel, with in the connection bump insertion connecting hole that is provided with on the above-mentioned connecting plate above-mentioned circuit substrate being installed, connection bump is engaged with circuit substrate.
According to said structure; a plurality of secondary cells with framework with integrated; be positioned at the framework that keeps the hush panel side, engage with the positive pole that forms and negative electrode terminal on the hush panel and bonded circuitry substrate on the connection bump that forms on the connecting plate that a plurality of secondary cells are connected and/or are connected in parallel; can a plurality of secondary cells and circuit substrate are integrated; each secondary cell is connected on the circuit substrate, and the battery management circuit that constitutes on the circuit substrate can detect the voltage of each secondary cell and discharge and recharge control and battery protection etc.Utilize this structure, a plurality of secondary cells do not connect up with needing lead-in wire being connected of circuit substrate, utilize the incorporate structure of a plurality of secondary cells and circuit substrate can implement to be electrically connected.
Description of drawings
Fig. 1 represents the stereogram of surface structure of the battery pack of embodiment
Fig. 2 represents the exploded perspective view of the inscape of above-mentioned battery pack
Fig. 3 represents to be applicable to the stereogram of structure of the secondary cell of above-mentioned battery pack
Fig. 4 represents to keep the stereogram of structure of the central frame of secondary cell
Fig. 5 A～Fig. 5 B represents the structure of terminals side framework, and Fig. 5 A is the stereogram of expression outside one side, and Fig. 5 B is the stereogram of expression the inside one side
Fig. 6 represents the side view of the syndeton of a plurality of secondary cells and circuit substrate
Fig. 7 represent to be connected in series stereogram of structure of plate
Fig. 8 represents the cutaway view of the structure that air is mobile with respect to secondary cell
Fig. 9 explanation is installed to the end view of the mounting structure on the electric tool
Figure 10 explanation is installed to the end view of the mounting structure on the charger
Embodiment
Below with reference to Fig. 1～Figure 10 preferred example of the present invention is described.
Fig. 1 represents the battery pack 1 of embodiment, is mounted to the driving power that constitutes electric tool A among the electric tool A as shown in Figure 9.In addition, when the use face owing to electric tool A reduces battery capacity, it can be unloaded from electric tool A, as shown in Figure 10, be mounted among the charger B and charge.When being installed on electric tool A or the charger B, after the convex strip portions that makes electric tool A or charger B go up setting embeds and pushes battery pack 1 in the slip ditch 20a that forms on the two sides of the installation portion 20 that is arranged on battery housing 5 tops, remain on the socket that the attachment plug 14 that is provided with on the connector shell 12 of installation portion 20 central authorities inserts electric tool A or charger B and be electrically connected, battery pack 1 is mounted simultaneously.
This battery pack 1 is as Fig. 2 exploded view is represented; its structure is: take in the circuit substrate 3 that 10 secondary cells 2 and formation are carried out the battery management circuit that discharges and recharges control and battery protection control etc. of this secondary cell 2 in the battery housing 5, and be combined into one with the fan 4 that promotes secondary cell 2 heat radiations.
Above-mentioned secondary cell 2 is suitable for the lithium rechargeable battery that has formed flat cuboid profile, as shown in Figure 2, the maximum area tabular surface of this secondary cell 2 is vertical with the bottom surface of battery housing 5, and it is opposed mutually to separate the interval of regulation, disposes 10 secondary cells 2 side by side.In order to keep like this 10 secondary cells 2 being separated the predetermined distance state of configuration side by side, as shown in Figure 4, the middle body that keeps secondary cell 2 with the central frame 7 that is formed with 10 battery outer portions (peristome) 17, this battery outer portion 17 has corresponding opening shape of length direction middle body sectional area and the size with secondary cell 2, and the two ends of secondary cell 2 are kept by terminals side framework 6, bottom side framework 8 respectively.
As shown in Figure 3, positive plate and negative plate that secondary cell 2 insertion in the battery can 24 that forms end square tube will form long size shape clip membrane coil around the convoluted pole plate group that forms, or insert the cascade type pole plate group that clips stacked a plurality of positive plates of barrier film and negative plate, seal the openend of battery can 24 at the openend solder up plate 23 of battery can 24, in battery can 24, inject sealed cell jar 24 behind the electrolyte.With hush panel 23 electric insulation ground the positive terminal 21 that is connected with positive plate is set on above-mentioned hush panel 23, hush panel 23 and battery can 24 constitute the negative terminal of secondary cell 2.
When secondary cell 2 causes temperature to rise owing to heavy-current discharge or reason such as overcharge, battery can 24 can be because swelling appears in thermal expansion or electrolyte vaporization etc., and this situation can occur significantly on the maximum area tabular surface that becomes battery can 24 sides.No matter the pole plate group that is accommodated in the battery can 24 is convoluted or cascade type, all being in positive plate and negative plate clips under the stacked state of barrier film by cramping between the maximally-flat face of battery can 24 both sides, the ion that moves in the electrolyte that exists with the state that is immersed in the barrier film moves around between the anodal utmost point and negative plate, thereby realizes discharging and recharging reaction.In case and swelling appears in battery can 24, the compact state of each interlayer just can be damaged, and the space can occur between each layer, thereby abnormality can appear in the degree that might ion moves, and becomes the inadequate state of reaction that discharges and recharges.
As shown in Figure 4, in central frame 7, when inserting 10 secondary cells 2 in the battery outer portions 17 respectively and since the substantial middle that secondary cell 2 remains on its battery can 24 partly by from around the state that encases, can not expand phenomenon so secondary cell 2 is in by the state of cramping.By the way, owing to be applicable to that the short side direction width of the secondary cell 2 of the present embodiment is 10mm, the short side direction width of battery outer portion 17 is 10.4mm, so when initial the installation, secondary cell 2 successfully can be inserted in the battery outer portion 17, and because the expansion of battery can 24, therefore can suppress the problems such as decreased performance of the secondary cell 2 that the expansion because of battery can 24 causes by the width limitations of battery outer portion 17.
Make 10 secondary cells 2 be respectively same direction ground and insert in each battery outer portion 17 of central frame 7, the bottom side framework 8 that has formed the corresponding bottom of the shape size housing recess 18 of shape size and battery can 24 bottoms side by side is installed in bottom surface one side of secondary cell 2.Hush panel 23 1 sides at secondary cell 2, shown in Fig. 5 B, terminals side framework 6 is installed, this terminals side framework 6 side within it is formed with the mouth-sealed portion housing recess 19 of hush panel 23 sides of taking in secondary cell 2, and is formed with the negative pole that the positive pole that positive terminal 21 is run through connects window 25 and a part of plate face that can observe hush panel 23 in its recess bottom surface and is connected window 26.The outside at this terminals side framework 6, shown in Fig. 5 A, be formed with the substrate reception recess 28 of taking in circuit substrate 3,10 secondary cells 2 and each secondary cell 2 is connected to the plate 9 that is connected in series, anodal connecting plate 10 of circuit substrate 3, the connecting plate housing recess 27 of taking in negative pole connecting plate 11 are connected in series.On the bottom surface of connecting plate housing recess 27, have the above-mentioned anodal window 25 that connects and be connected window 26 with negative pole.
With terminals side framework 6, central frame 7 and bottom side framework 8 after 10 secondary cells 2 are bonded with each other it, the positive pole that forms from terminals side framework 6 connects window 25 and is connected window 26 with negative pole and makes the plate 9 that is connected in series shown in Figure 7 cross over adjacent secondary cell 2 and positive terminal 21 and hush panel 23 to connect as shown in Figure 6, respectively anodal connecting portion 41 is spot welded on the positive terminal 21, negative pole connecting portion 42 is spot welded on the hush panel 23, thereby 10 secondary cells 2 are connected in series.Anodal 10 of connecting plates are welded on the positive terminal 21 of secondary cell 2 of the link that becomes the side of the positive electrode that is connected in series, and 11 of negative pole connecting plates are welded on the hush panel 23 of secondary cell 2 of the link that becomes the negative side that is connected in series.Fig. 7 is the example of plate 9 of being connected in series, and forms the promising substrate connection bump 29 that is connected with circuit substrate 3 on the plate 9 that is connected in series, anodal connecting plate 10, negative pole connecting plate 11 respectively.
After in circuit substrate 3 being received into the substrate reception recess 28 that the plate 9 that is connected in series, anodal connecting plate 10, negative pole connecting plate 11 is spoted weld 10 terminals side frameworks 6 on the secondary cell 2, the substrate connection bump 29 that forms on plate 9, anodal connecting plate 10 and the negative pole connecting plate 11 that is connected in series is inserted in the connecting hole that forms on the circuit substrates 3, so each substrate connection bump 29 just is brazed on the circuit substrate 3.By adopting this syndeton; need not be for 10 secondary cells 2 being connected respectively on the circuit substrate 3 and the wiring that goes between; just each secondary cell 2 can be connected on the circuit substrate 3; at the voltage that can measure each battery of each secondary cell 2 on the circuit substrate 3 from the voltage between the substrate connection bump 29; the battery protecting circuit that constitutes on the circuit substrate 3 protects secondary cell 2 can not overcharge according to the cell voltage of each secondary cell 2; the control of over-discharge can, charge-discharge control circuit discharges and recharges control according to cell voltage and the battery temperature measured.
After as described above secondary cell 2 and circuit substrate 3 being combined into one; as shown in Figure 2; at four sides configuration protection plate 16; fan 4 on will being configured in central frame 7 fences up after the configuration connector shell 12; close the battery housing 5 that constitutes by right shell body 5a and left shell 5b, finish the installation of battery pack shown in Figure 11.
After being slidingly mounted on this battery pack 1 among the electric tool A as shown in Figure 9, the attachment plug 14 that is arranged in the connector shell 12 is connected with the socket that is connected in being arranged on electric tool A, place on the ON by the driving switch with electric tool A, power supply circuit from driving electric to electric tool A that supply with just is in closure state.After strengthening the driving load of electric tool A, the discharge capacity of secondary cell 2 increases thereupon, so temperature rises, when the battery management electric circuit inspection after set point of temperature, battery management circuit controlling and driving fan 4, so secondary cell 2 is by fan cooled.Because the discharge in the lithium rechargeable battery can produce exothermic reaction, so using electric tool A to occur under the situation of big electric current generating, the temperature of secondary cell 2 rises violent, and battery management circuit control fan 4 uses secondary cell 2 by air-supply under 60 ℃ or following state of temperature.Especially in full summer in the hot environment, the temperature that can suppose secondary cell 2 before using is above 40 ℃, under this environment, use electric tool A, then temperature rises very big, control so the battery management circuit is following: when the temperature of secondary cell 2 is higher, though the operating position of electric tool A how all drive fan 4 with the cooling secondary cell 2; Temperature at secondary cell 2 surpasses under 60 ℃ the situation, then stops the supply capability to electric tool A, reduces the temperature of secondary cell 2 by drive fan 4.
The structure of fan 4 blows to secondary cell 2 with the extraneous air that sucks and makes its cooling for by rotation extraneous air being sucked suction fan in the battery housing 5.When being installed in battery pack 1 among the electric tool A, because connector shell 12 connects with the battery pack installed surface of electric tool A, therefore on the battery pack installed surface of the electric tool A relative, form peristome with the air entry 32 of connector shell 12, as shown in Figure 9, form the extraneous air suction inlet a that communicates with above-mentioned peristome in the side of the installation position of the installation battery pack 1 of electric tool A.
Shown in Fig. 8 white arrow, because fan 4 is configured on the central frame 7 in the battery housing 5, so after drive fan 4, the extraneous air that is sucked by air entry 32 passes through between the secondary cell 2 of spacing parallel arranging configuration in accordance with regulations, formation is from the air flows circuit of the below air vent hole 13a discharge of battery housing 5 lower aperture, therefore can cool off the secondary cell 2 that causes temperature to rise because of the big discharging current that drives electric tool A, the rising of control temperature.And, the effect that is arranged on the cowling panel 15 on the central frame 7 is: can be with the air flow both sides shunting of being sent by fan 4, air is blown to be positioned at the secondary cell 2 under the fan 4, and can also blow to the secondary cell 2 that is positioned at two ends, make all secondary cells 2 all be able to impartial cooling.Form peristome by on cowling panel 15, adjusting open semi footpath and aperture position, can adjust and air be flow to be positioned on the secondary cell 2 of cowling panel 15 belows, make the air cooling state equalization of each secondary cell 2, the temperature of battery is controlled equably.
When being installed in battery pack 1 among the electric tool A, as shown in Figure 9, forming the foot that makes electric tool A and the bottom surface of battery pack 1 is in the sustained height position by size, thereby electric tool A is stably stood on floor etc. battery pack 1.As shown in Figure 8, the cross section of the length direction of the secondary cell 2 of battery housing 5 forms, below both sides be formed with below recess 31a, both sides are formed with top recess 31b up, below this and above each recess 31a, 31b on be formed with respectively below air vent hole 13a, above air vent hole 13b.By forming each recess 31a, the 31b of this below and top, A is in erectility at electric tool, even promptly under the state that electric tool A stops to drive, below air vent hole 13a can not stop up yet, shown in dotted arrow, the extraneous air that flows into from below air vent hole 13a forms the air stream by flowing out from top air vent hole 13b between the secondary cell 2.Especially after driving electric tool A, the temperature of secondary cell 2 rises, produce the ascending air that flows to top air vent hole 13b owing to heat, form from below air vent hole 13a thereupon and flow into extraneous air, and by flowing to the air stream of top air vent hole 13b between the secondary cell 2, even the secondary cell 2 that temperature rises also can promote cooling effect under the state that fan 4 stops, the temperature that can quickening secondary cell 2 descends.
Though each air vent hole 13a, the 13b of above-mentioned below and top can promote the cooling of secondary cell 2 effectively, but under the environment that waits water droplet to disperse in the rain, use the situation of electric tool A, and electric tool A is placed under the ground situation of ponding, have water from the below and top each air vent hole 13a, 13b immerse may.As shown in Figure 8, because even water immerses battery housing 5 inside, the hush panel side of each secondary cell 2 is all surrounded by terminals side framework 6, circuit substrate 3 by resin moulded 30 cover, so water can not be immersed in the energising part, thereby guaranteed the fail safe that the battery pack 1 of electric tool A is used under imaginary adverse circumstances.
Under the situation that battery electric quantity is reduced, battery pack 1 is unloaded from electric tool A, as shown in figure 10, battery pack 1 is mounted among the charger B secondary cell 2 enforcement chargings.When being mounted to battery pack 1 among the charger B, as shown in the figure, above-below direction put upside down be installed among the charger B, air in the ventilating opening sucking-off charger B of the installation site of the battery pack 1 that is arranged on charger B makes secondary cell 2 coolings in the charging in the heat of discharging charger B.If when charger B one side also is provided with ventilating fan,, then can play better cooling effect with fan 4 air-supplies.
The battery pack 1 that unloads the electric tool A after just using, the temperature that can suppose secondary cell 2 be in suitable charging temperature or more than, the temperature of battery not only can detect with the battery management circuit, can also detect in charger B one side by connector, so under battery temperature is in situation more than 45 ℃, do not begin charging, continue to be cooled to battery temperature by air-supply and after below 45 ℃, begin charging again.
Though in the battery pack 1 of above explanation, be suitable for flat square battery as secondary cell 2, also can be suitable for the secondary cell that forms drum, can obtain the effect identical with the structure of above-mentioned embodiment.
As mentioned above, according to the present invention, dispose a plurality of secondary cells with gap side by side owing to be provided with between employing is adjacent, utilize circulation of air to promote the cooling of secondary cell, even dust, water droplet enters from the blow vent that extraneous air is sucked battery housing inside, also because the structure that circuit part is not easy to suffer damage by resin moulded the covering, in addition, also a plurality of secondary cells and circuit substrate are integrated to be become in the block structure making, each secondary cell and circuit substrate are electrically connected, therefore wiring need not go between between each secondary cell and circuit substrate, and the main composition key element forms bulk, therefore only need put it in the battery housing and just can constitute firm structure simply, be suitable as the battery pack of the battery supply of the electric tool that in most cases under adverse circumstances, uses etc. so be applicable to realization.
Claims (5)
1. one kind is accommodated in a plurality of secondary cells (2) and circuit substrate (3) in the battery housing (5) and the battery pack that constitutes, described secondary cell (2) is by being accommodated in pole plate group and electrolyte in the battery can (24) and sealing openend with hush panel (23), and electrode terminal (21) is set on described hush panel and constitutes, described circuit substrate (3) has constituted the battery management circuit of the action of each secondary cell of control and management; It is characterized in that, the hush panel side that makes described a plurality of secondary cells is same direction and keeps with framework (6,7,8) with the state that separates predetermined distance, a plurality of secondary cells are become one, described circuit substrate is installed on the framework (6) of the hush panel side that keeps a plurality of secondary cells, after being electrically connected between with circuit substrate and each secondary cell and input and output terminal, implement to cover required of circuit substrate resin moulded with resin.
2. one kind is accommodated in a plurality of secondary cells (2) and circuit substrate (3) battery pack that constitutes in the battery housing (5), described secondary cell (2) is by being accommodated in pole plate group and electrolyte in the battery can (24) and sealing openend with hush panel (23), and electrode terminal (21) is set on described hush panel and constitutes, described circuit substrate (3) has constituted the battery management circuit of the action of each secondary cell of control and management; It is characterized in that, the hush panel side that makes described a plurality of secondary cells is same direction and keeps with framework (6,7,8) with the state that separates predetermined distance, connecting plate (9,10,11) is joined on the electrode terminal of each secondary cell, make a plurality of secondary cells connect and/or be connected in parallel, the connection bump (29) that is provided with on the described connecting plate is inserted in the connecting hole that is provided with on the described circuit substrate described circuit substrate is installed, connection bump is engaged with circuit substrate.
3. battery pack as claimed in claim 1 or 2, wherein, secondary cell (2) forms flat square, and is kept by framework (6,7,8) in interval and the mutual opposed mode that its maximum area tabular surface separates regulation.
4. battery pack as claimed in claim 1, wherein resin moulded is the installed surface that covers the electronic devices and components that comprise current-carrying part with resin.
5. battery pack as claimed in claim 1, wherein resin moulded is resin is filled in the recess of taking in circuit substrate (3) (28) of framework (6) of hush panel (23) one sides and covers circuit substrate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP011652/2004 | 2004-01-20 | ||
| JP2004011652A JP4662530B2 (en) | 2004-01-20 | 2004-01-20 | Battery pack |
| JP011653/2004 | 2004-01-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1898819A CN1898819A (en) | 2007-01-17 |
| CN100423322C true CN100423322C (en) | 2008-10-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800014111A Expired - Fee Related CN100423322C (en) | 2004-01-20 | 2005-01-18 | Battery pack |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4662530B2 (en) |
| CN (1) | CN100423322C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576917A (en) * | 2009-10-05 | 2012-07-11 | 锂电池科技有限公司 | Energy storage unit having extended service life |
| CN105745772A (en) * | 2014-01-17 | 2016-07-06 | 三洋电机株式会社 | Power source device |
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|---|---|---|---|---|
| EP2450981B1 (en) * | 2004-12-24 | 2014-03-19 | Lg Chem, Ltd. | Secondary battery module |
| KR100904373B1 (en) * | 2004-12-24 | 2009-06-25 | 주식회사 엘지화학 | Heat Radiation Structure for Secondary Battery Module, and Switching Board And Secondary Battery Module Having the Same |
| EP1994582B1 (en) | 2006-03-06 | 2019-12-04 | LG Chem, Ltd. | Middle or large-sized battery module |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN1898819A (en) | 2007-01-17 |
| JP2005209365A (en) | 2005-08-04 |
| JP4662530B2 (en) | 2011-03-30 |
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