CN103887457A

CN103887457A - Battery pack

Info

Publication number: CN103887457A
Application number: CN201310665247.0A
Authority: CN
Inventors: 王汉准
Original assignee: Samsung SDI Co Ltd
Current assignee: Tianjin Samsung Vision Co Ltd; Samsung SDI Tianjin Battery Co Ltd; Samsung SDI Co Ltd
Priority date: 2012-12-21
Filing date: 2013-12-10
Publication date: 2014-06-25
Anticipated expiration: 2033-12-10
Also published as: CN103887457B

Abstract

A battery pack includes a battery cell; a case comprising a first case and a second case coupled together and accommodating the battery cell, wherein the first case includes a first rib extending circumferentially around the first case and generally defining a battery cell accommodation space for the battery cell around an interior of the first rib, the first rib having a ridged section comprising alternating thick portions and thin portions.

Description

Battery pack

The cross reference of related application

The application requires the U.S. Provisional Application the 61/745th of submitting in United States Patent (USP) trademark office on December 21st, 2012, the priority of No. 301 and rights and interests, and its full content is incorporated herein by reference.

Technical field

One or more embodiment of the present invention relates to battery pack.

Background technology

Conventionally, different from the primary cell that can not recharge, secondary cell is the battery that can charge, discharge and recharge.Secondary cell is used as the power supply for mobile device, electric automobile, hybrid vehicle, electric bicycle, uninterrupted power supply etc.The type of the external equipment being applied to according to secondary cell, secondary cell can single monocell or multiple monocell form of being connected battery pack wherein used.

Although can utilize output and volume operation a period of time of single monocell such as the small type mobile devices of mobile phone, but can expect that battery pack is used for consuming the mobile device of relatively a large amount of power, for example notebook computer, or need long period of operation and high-power equipment, such as electric automobile, hybrid vehicle etc., wherein the output voltage of battery pack or output current can along be included in monocell wherein quantity increase and increase.

Summary of the invention

One or more embodiment of the present invention comprises a kind of battery pack, and the distortion that the cooling contraction after wherein molded by the high temperature of battery container causes reduces, and noise between this battery container erecting stage reduces.

According to one or more embodiment of the present invention, a kind of battery pack comprises: monocell; The first housing and the second housing, described the first housing and described the second housing are attached to and face with each other, to be provided for holding the space of described monocell, wherein said the first housing comprises that first rib is with around described monocell, and described first rib comprises uneven portion, in described uneven portion, thick portion and the thin portion with different-thickness are alternately arranged.

For example, described the first housing comprises the first base plate being arranged as in the face of the first first type surface of described monocell, and described first rib is outstanding along the edge of described the first base plate.

For example, described the first base plate comprises the flange unit to main equipment to be attached.

For example, described uneven portion is formed on the formation of described first rib near the part place on the border of described flange unit.

For example, described flange unit is formed on the bight place of described the first base plate.

For example, described uneven portion forms along the described first rib being bent with around described flange unit.

For example, sentence around described flange unit in the bight that described uneven portion is formed on being divided into of described first rib of different direction.

For example, described flange unit comprises the first flange unit and the second flange unit that are formed on along two the relative bights place in the direction of the sidepiece of described the first base plate.

For example, intensity enhancing unit is formed on described flange unit place.

For example, be formed on the described flange unit place to described main equipment to be attached towards the outstanding lug boss of described main equipment.

For example, described uneven portion is interrupted formation on the length direction of described first rib.

For example, par is formed between described uneven portion located adjacent one another.

For example, described par is formed and has basic thickness uniformly.

For example,, for making described the first housing and the interconnected linkage unit of described the second housing be formed on described par place.

For example, described linkage unit runs through whole length interruption formation of described first rib.

For example, described the second housing comprises and being arranged as in the face of the second base plate of the second first type surface of described monocell with along the outstanding second rib in the edge of described the second base plate.

For example, multiple monocells are arranged, and monocell located adjacent one another is stacked to form different layers, and described second first type surface of monocell located adjacent one another forms stage portion.

For example, described the second base plate has stage portion, and this stage portion has shape corresponding to described stage portion between described second first type surface of monocell located adjacent one another.

The first linkage unit and the second linkage unit for be attached to each other described the first housing and described the second housing are formed on respectively described first rib and described second rib place.

For example, described the first linkage unit and described the second linkage unit form hook-shaped connection.

For example, described the first linkage unit comprises connecting plate, and this connecting plate is formed on and deviates from the position of described first rib and comprise connection opening, and described the second linkage unit comprises and is inserted into the hook portion locking in described connection opening and by described connection opening.

For example, described the first linkage unit and described the second linkage unit are formed on the position of mutual correspondence, and the described flange unit of described the first base plate is formed on the position that deviates from described the second base plate.

For example, described spatial accommodation comprises monocell spatial accommodation for holding described monocell and for holding the circuit spatial accommodation of the protective circuit module for controlling the operation for described monocell being carried out to charging and discharging.

Treat can be formed on the first flange unit of main equipment combination and the second flange unit two opposite side portions of described circuit spatial accommodation.

According to the present invention, a kind of battery pack is provided, the distortion that the cooling contraction after this battery pack is not molded by the high temperature at battery container causes, and there is no noise between described battery container erecting stage.

Brief description of the drawings

Fig. 1 is the decomposition diagram of battery pack according to an embodiment of the invention;

Fig. 2 and Fig. 3 are respectively the decomposition diagram of the first housing shown in Fig. 1 and the second housing;

Fig. 4 to Fig. 6 is respectively region IV, V in Fig. 2 and the more detailed perspective view of VI;

Fig. 7 is the more detailed perspective view of the region VII in Fig. 3;

Fig. 8 is the vertical view that is shown in further detail the uneven portion in Fig. 4; And

Fig. 9 to Figure 11 B illustrates according to the shape of the first first rib to the 3rd comparative example.

Embodiment

With detailed reference to embodiment, the example of embodiment is exemplified in the accompanying drawings now, and wherein similar Reference numeral refers to similar element all the time.In this, the present embodiment can have different forms, and should not be construed as limited to the description in this statement.Correspondingly, below only by describing embodiment with reference to the accompanying drawings, to explain the aspect of this description.As used herein, term "and/or" comprises the arbitrary and all combinations in one or more listed associated item.

Hereinafter, battery pack is according to an exemplary embodiment of the present invention described with reference to the accompanying drawings.

Fig. 1 is the decomposition diagram of battery pack 100 according to an embodiment of the invention.Fig. 2 and Fig. 3 are respectively the first housing 110 shown in Fig. 1 and the decomposition diagram of the second housing 120.In one embodiment, as shown in Figures 2 and 3, the first housing 110 and the second housing 120 can fitted to be around assembling axis C and rotate and face with each other.

Referring to Fig. 1 to Fig. 3, battery pack 100 comprises that at least one monocell 150 and the first housing 110 and the second housing 120, the first housings 110 and the second housing 120 fitted to be and faces with each other, so that the spatial accommodation G of monocell 150 to be provided.

The first housing 110 and the second housing 120 are assembled by least one monocell 150 between them being inserted in the spatial accommodation G of monocell 150.For example, the first housing 110 can comprise the first base plate 111 and give prominence to and limit the first rib 115 of spatial accommodation G from the first base plate 111.According to embodiments of the invention, first rib 115 extends away from the first base plate 111.Similarly, the second housing 120 can comprise the second base plate 121 and give prominence to and limit the second rib 125 of spatial accommodation G from the second base plate 121.

The first base plate 111 and the second base plate 121 can be formed the plate of overall flat, and can be arranged to across monocell 150 and face with each other.Conventionally, the first base plate 111 and the second base plate 121 can have the shape of mutual correspondence, and each in the first base plate 111 and the second base plate 121 has and be included in the upper a pair of long limit of extending of long side direction (x direction of principal axis) and the basic rectangular shape in the upper pair of short edges of extending of short side direction (y direction of principal axis).

According to embodiments of the invention, the first base plate 111 and the second base plate 121 can be formed has different shapes.In other words, the first base plate 111 can be formed has rectangular shape, and the second base plate 121 can have the shape of not facing the flange unit 114 of the first base plate 111.As described below, because making battery pack 100 and main equipment, flange unit 114 is connected to each other, so the second base plate 121 and flange unit 114 can be formed on the position of mutual repulsion, to stop the second base plate 121 between flange unit 114 and main equipment.

In other words, the flange unit 114 of the first base plate 111 can be formed on the position separating with the second base plate 121.For example, flange unit 114 can be formed on along long side direction (x direction of principal axis) two relative bights place of the first base plate 111, and the second base plate 121 can have inside indentation to avoid the shape of flange unit 114 in bight,, wherein grow the outstanding shape of core on limit (on x direction of principal axis).The protuberance of the second base plate 121 can be formed for being formed for forming together with the first base plate 111 the circuit accomodating unit 122 of protective circuit module spatial accommodation G2.

In one embodiment, the first base plate 111 can form by being mounted to main equipment a part for the overall appearance of main equipment, wherein can be formed on the basal surface of the first base plate 111 for supporting the rubber blanket of whole main equipment.

First rib 115 and second rib 125 can be outstanding from the edge of the first base plate 111 and the second base plate 121 respectively.First rib 115 and second rib 125 can be formed on the position of mutual correspondence, with around monocell 150 and limit spatial accommodation G.For example, first rib 115 and second rib 125 can be arranged to formation closed-loop, to seal spatial accommodation G.

First rib 115 forms along the edge of the first base plate 111 substantially, and wherein first rib 115 can be formed and walk around flange unit 114 inner side in flange unit 114.In other words, because flange unit 114 is arranged to directly in the face of main equipment and battery pack 100 and main equipment are connected to each other, so the spatial accommodation G of battery pack 100 can be formed on the position being connected of not interfering flange unit 114 and main equipment.In other words, the spatial accommodation G of battery pack 100 and flange unit 114 can be formed on the position of mutual repulsion.In one embodiment, second rib 125 can form along the edge of the second base plate 121.

Referring to Fig. 2 and Fig. 3, make interconnected the first linkage unit 118 of the first housing 110 and the second housing 120 and the second linkage unit 128 can be formed on respectively first rib 115 and second rib 125 places.For example, when the first housing 110 and the second housing 120 are attached to while facing with each other, first rib 115 and second rib 125 can fitted to be and contact with each other, and can be attached to one another via the first linkage unit 118 and second linkage unit 128 of the position that is formed on mutual correspondence.

Fig. 4 to Fig. 6 is respectively region IV, V in Fig. 2 and the more detailed perspective view of VI.Fig. 7 is the more detailed perspective view of the region VII in Fig. 3.

Referring to Fig. 4 to Fig. 7, the first linkage unit 118 and the second linkage unit 128 can be formed on first rib 115 and second rib 125 places, so that the first housing 110 and the second housing 120 are connected to each other.For example, the first linkage unit 118 and the second linkage unit 128 can form hook-shaped connection.As described below, the first linkage unit 118 is disposed in the position that deviates from first rib 115, and can comprise the connecting plate that wherein forms connection opening 118 '.In addition, the second linkage unit 128 can comprise and being inserted in connection opening 118 ' and blocked hook portion thus.Be formed on the connection opening 118 ' stop at first rib 115 places and lock owing to being formed on the hook portion (the second linkage unit 128) at second rib 125 places, so can stop the first linkage unit 118 and the second linkage unit 128 to be separated from each other.

Hereinafter, referring to Fig. 2 and Fig. 4 to Fig. 6, will the uneven 115a of portion of first rib 115 be described.

Referring to Fig. 2 and Fig. 4 to Fig. 6, the uneven 115a of portion can be formed on first rib 115 places.For example, the uneven 115a of portion can be formed on facing on the inner surface of spatial accommodation G of first rib 115.

The 115a of unevenness portion can contribute to stop contraction.For example, the first housing 110 and the second housing 120 can be molded and be formed and have suitable shape via high temperature.Here, the uneven 115a of portion can contribute to stop cooling contraction.

As described below, the 115a of unevenness portion comprises uneven pattern or ridge areas, in uneven pattern or ridge areas, thick portion and thin portion are replaced and repeat to arrange, to form ridge and groove alternately, stop thus the contraction of first rib 115 maintenance to be enough to the stably thickness of the second rib 125 of support assemblies on first rib 115.According to embodiments of the invention, thick portion is outstanding towards monocell 150 with respect to thin portion.

The 115a of unevenness portion can completely form or can optionally form along a part for first rib 115 along the length of first rib 115.At length, according to embodiments of the invention, the uneven 115a of portion can optionally form along a part for first rib 115.According to embodiments of the invention, the uneven 115a of portion can be formed in first rib 115 part forming near the border of flange unit 114.In other words, the uneven 115a of portion can be formed in first rib 115 part that flange unit 114 and spatial accommodation G are separated from each other.

Flange unit 114 is configured to make battery pack 100 and main equipment to be connected to each other, and wherein assembly unit 114a is formed on flange unit 114.If formation is shunk and is out of shape near the first rib 115 on the border of flange unit 114, warpage can stop flange unit 114 to be easily assembled to main equipment.

For example, according to embodiments of the invention, lug boss can be used as to be assembled to the assembly unit 114a of main equipment and is formed on assembly unit 114 places, and this lug boss can be configured to receive external equipment, wherein can be formed on assembly unit 114a for the attachment hole of thread attachment.If 114 places form warpage in flange unit, the position of lug boss or perpendicularity can be twisted, thereby can become difficulty with the assembling of main equipment.Therefore, the uneven 115a of portion can be formed selectively the part place of engagement flange unit 114 in first rib 115.

In one embodiment, according to another embodiment of the present invention, the uneven 115a of portion can form along the length of first rib 115 completely.In this case, the uneven 115a of portion also can stop contraction and the distortion of first rib 115, and reduces assembling noise.

Below by the orientation of describing in more detail between flange unit 114 and the uneven 115a of portion.For example, flange unit 114 can comprise that, along the first flange unit 1141 of the long side direction of the first base plate 111 (x direction of principal axis) and the second flange unit 1142, wherein the uneven 115a of portion can be formed on first rib 115 places around the first flange unit 1141 and the second flange unit 1142.

Referring to Fig. 5, flange unit 114 can be formed on the bight place of the first base plate 111, and the uneven 115a of portion can form along the first rib 115 being bent with around flange unit 114.In other words, the uneven 115a of portion forms along being bent with the first rib 115 around flange unit 114, and can be along forming at the upper first rib 115 extending of two different directions (x direction of principal axis and y direction of principal axis).

The 115a of unevenness portion can be formed on the bight place that is divided into two different directions (x direction of principal axis and y direction of principal axis) of first rib 115.For example, the uneven 115a of portion can be formed selectively the discontinuities office on the length direction of first rib 115, and wherein the uneven 115a of portion can be formed on the bight place of first rib 115.Shrinkage stress can be applied to the bight that is divided into two different directions (x direction of principal axis and y direction of principal axis) during the cooling contraction after high temperature is molded in two different directions, thereby shrinkage stress can concentrate on this.For example, according to concentrating of shrinkage stress, compared with the other parts of first rib 115, can there is larger volume contraction at the bight place of first rib 115.Therefore, the uneven 115a of portion can be arranged to the shrinkage stress that reduces the bight that is applied to first rib 115 stress that reduces to be as far as possible delivered to flange unit 114.

In Fig. 6, different from Fig. 5, the uneven 115a of portion is not formed on the bight place that is divided into two different directions (x direction of principal axis and y direction of principal axis) of first rib 115.Alternatively, the uneven 115a of portion be formed on first rib 115 at the upper part place of extending of a direction (y direction of principal axis), and the par 115b with basic uniform thickness be formed on first rib 115 at the upper part place of extending of other direction (x direction of principal axis).As described below, the first linkage unit 118 to the second housing 120 to be attached is formed on 115b place, par, the par 115b with relative smooth surface be formed do not interfere attached.In one embodiment, the clamping components that the Reference numeral 117 in Fig. 6 represents for being fixedly contained in the circuit unit of protective circuit module spatial accommodation G2.

Referring to Fig. 2, the uneven 115a of portion can be on the length direction of first rib 115 forms discontinuously, and the par 115b with basic uniform thickness can be formed between the uneven 115a of portion of first rib 115.

The first linkage unit 118 can be formed on 115b place, par.The first linkage unit 118 and the second linkage unit 128 clamp the first housing 110 and the second housing 120, thereby the first housing 110 and the second housing 120 are not separated from one another.Par 115b provides attachment point for the first linkage unit 118 and the second linkage unit 128.For example, par 115b can have basic thickness and relative level and smooth surface uniformly, not interfere attached between the first linkage unit 118 and the second linkage unit 128.

The first linkage unit 118 is disposed in the position that deviates from par 115b, and can comprise the connecting plate that wherein forms connection opening 118 '.This connection opening 118 ' is configured to receive securing member, so that the first housing 110 is connected to the second housing 120.For example, the second linkage unit 128(hook portion) can be inserted in the connection opening 118 ' between par 115b and the first linkage unit 118 and locked thus, wherein the engaging friction power of the second linkage unit 128 can be reduced by the par 115b with uniform thickness and smooth surface.The first linkage unit 118 can extend from the position that deviates from par 115b in parallel therewith, and can be formed the platy structure of overall flat.

The first linkage unit 118 can form along the length of first rib 115 completely.In other words, the first linkage unit 118 can not only be formed on the part place forming near the border of flange unit 114, and forms along the length of extending with the first rib 115 around monocell 150 completely.

The first linkage unit 118 can be interrupted formation on the length direction of first rib 115.The first linkage unit 118 and the second linkage unit 128 can be formed on the position of mutual correspondence, to be attached to one another.Can form along the length of first rib 115 and second rib 125 completely in order to clamp securely the first housing 110 and the second housing 120, the first linkage units 118 and the second linkage unit 128.

For example, being parallel to the connecting plate (the first linkage unit 118) that first rib 115 extends can be arranged in along the discontinuity position place of the length of first rib 115.In addition, locking the second linkage unit 128(hook portion) connection opening 118 ' can be formed in connecting plate.The second linkage unit 128 can enter between first rib 115 and connecting plate and by connection opening 118 ' and fix.

Referring to Fig. 1, flange unit 114 can be formed on the long side direction (x direction of principal axis) of the first base plate 111.For example, flange unit 114 can be formed on two relative bight places on long side direction (x direction of principal axis).For example, flange unit 114 can comprise the first flange unit 1141 and the second flange unit 1142 of the long side direction (x direction of principal axis) along the first base plate 111.The first flange unit 1141 can above extend longlyer than the second flange unit 1142 from bight at long side direction (x direction of principal axis).

As described below, the protective circuit module spatial accommodation G2 wherein holding for controlling the protective circuit module 130 for monocell 150 being carried out to the operation of charging and discharging can be disposed between the first flange unit 1141 and the second flange unit 1142.By protective circuit module 130 being contained in the space between the first flange unit 1141 and the second flange unit 1142, the overall structure of battery pack 100 can be compact.

Flange unit 114 will make battery pack 100 and main equipment be connected to each other.114 places, flange unit can be formed on such as the assembly unit 114a of lug boss, wherein lug boss can be formed on for the thread attachment hole of thread attachment.For example, assembly unit 114a can project upwards from the top surface of flange unit 114, or any in can various forms is formed battery pack 100 is aimed at the main equipment of battery pack 100 to be attached.

Intensity enhancing unit 114b can be formed on 114 places, flange unit.Flange unit 114 will make battery pack 100 and main equipment be connected to each other, and be formed thereon such as the assembly unit 114a of lug boss.Therefore,, if shrink and/or be out of shape at 114 places, flange unit, battery pack 100 is attached to main equipment and may becomes difficulty.For example, intensity enhancing unit 114b can be formed the candy strip rib structure outstanding from the top surface of flange unit 114.

Fig. 8 is the vertical view that is shown in further detail the uneven 115a of portion of Fig. 4.Referring to Fig. 8, the uneven 115a of portion can comprise uneven pattern, and in uneven pattern, thick portion 1151 and thin portion 1152 alternately and are repeatedly arranged on the length direction of first rib 115.For example, thick portion 1151 and thin portion 1152 can be formed has respectively different thickness, that is, and and the first thickness t 1 and the second thickness t 2.

The 115a of unevenness portion can contribute to stop contraction.For example, the first housing 110 and the second housing 120 can have suitable shape via molded being formed of high temperature.Here, the uneven 115a of portion can contribute to stop cooling contraction.

The 115a of unevenness portion comprises uneven pattern, in uneven pattern, thick portion 1151 and thin portion 1152 alternately and are repeatedly arranged, stop thus the contraction of first rib 115, and keep being enough to stably support the thickness of the second rib 125 being assembled on first rib 115.

First rib 115 is outstanding from the first base plate 111, and the thickness relationship that wherein first rib 115 located adjacent one another and the first base plate 111 can be based between them during cooling contraction is to stress application each other.As described below, if first rib 115 to the first base plates 111 are thick, the first base plate 111 can be stretched along with the volume contraction of first rib 115, causes thus warpage.Therefore, the thickness of the uneven 115a of portion, that is, the first thickness t 1 of thick portion 1151 and the second thickness t 2 of thin portion 1152 can be equal to or less than the thickness of the first base plate 111.

According to embodiments of the invention, the first thickness t 1 of thick portion 1151 and the second thickness t 2 of thin portion 1152 can be from about 0.6mm to about 0.8mm.At length, the first thickness t 1 of thick portion 1151 can be about 0.8mm, and the second thickness t 2 of thin portion 1152 can be about 0.6mm.Here, the thickness of the first base plate 111 can be about 0.8mm.

Fig. 9 illustrates according to the structure of the first rib 15 of the first comparing embodiment.First rib 15 projects upwards from the first base plate 11, and can have the thickness t 02 larger than the thickness t of the first base plate 11 01.When first rib 15 and the first base plate 11 may be cooled after high temperature is molded, experience is shunk and distortion, and wherein relatively thick first rib 15 to the first base plates 11 bear larger stress.First rib 15 shrinks on thickness direction, upwards draws thus the first base plate 11.

First rib 15 and the first base plate 11 can be interfered each other between contraction and deformation phases, and wherein relatively thick first rib 15 stands volume contraction, affects thus the first base plate 11.As a result, the first base plate 11 has the recessed shape to first rib 15, thereby forms so-called warpage, and warpage is the shape of the uneven and distortion of entirety.

Figure 10 illustrates according to the shape of the first rib 15 ' of the second comparing embodiment.First rib 15 ' is outstanding from the first base plate 11 '.The bottom 15a ' that contacts the first base plate 11 ' is formed has relatively little thickness, and top 15b ' is formed and has relatively large thickness.Although shape is considered contraction distortion and the warpage of interfering the first base plate 11 ' causing due to first rib 15 ', if but first rib 15 ' is formed in the whole length of first rib 15 ' and has thick top 15b ' and thin bottom 15a ', be difficult to be designed for this mould, and the structural strength of first rib 15 ' is lowered.

Figure 11 A and Figure 11 B illustrate according to the first rib 15 ' of the 3rd comparing embodiment ' shape.Figure 11 A and Figure 11 B illustrate respectively first rib 15 " before contraction distortion and contraction distortion after shape.

First rib 15 " from the first base plate 11 " outstanding, wherein first rib 15 " be formed entirety and there is little thickness.Although this shape is considered first rib 15 " contraction distortion and comprise for first rib 15 " the large-scale production operation of design of mould, this shape causes the lax assembling of battery pack, causes thus assembling noise and reduces assembling intensity.

At length, first rib 15 " at battery pack erecting stage Contact second rib 25 " and provide support second rib 25 " supporting construction.Along with first rib 15 " thus be retracted after contraction distortion, have than second rib 25 " the little thickness of thickness, first rib 15 " and second rib 25 " area that contacts with each other reduces, and causes thus lax attached.For example, first rib 15 " may not can and second rib 25 " form and accurately aim at, and be punctured into have than second rib 25 " the little thickness of thickness.As a result, first rib 15 " rigging position may accurately do not limited, and may produce assembling noise.

In embodiments of the invention shown in Figure 8, not to make first rib 115 be formed as entirety to there is large thickness or little thickness, and form the uneven 115a of portion, in the uneven 115a of portion, thick portion 1151 and thin portion 1152 alternately and are repeatedly arranged on the length direction of first rib 115.Therefore the problem, occurring in the first to the 3rd comparing embodiment can be solved completely.In addition, the cooling contraction of first rib 115 can be reduced, and can in large-scale production, not cause any problem (for example, the design of mould) and during being attached to second rib 125, cause assembling noise.

Referring to Fig. 8, par 115b can be formed on the position near the uneven 115a of portion, that is, and and between the uneven 115a of portion.Par 115b can have substantially uniform the 3rd thickness t 3 on the length direction of first rib 115.

For example, the 3rd thickness t 3 of par 115b can equate with the thickness of the thick portion 1151 of the uneven 115a of portion (the first thickness t 1).Par 115b can have the 3rd relatively large thickness t 3, contacts the area of second rib 125 to increase first rib 115, and can stably support the contact site of second rib 125.But, the invention is not restricted to this.For example, the 3rd thickness t 3 of par 115b can be the arbitrary thickness between the first thickness t 1 of thick portion 1151 and the second thickness t 2 of thin portion 1152.

Hereinafter, referring to Fig. 1, will the overall structure of battery pack 100 according to an embodiment of the invention be described.

The first housing 110 and the second housing 120 fitted to be and face with each other, and have one or more monocells 150 between them, and fitted to be and be defined for the spatial accommodation G that holds monocell 150.For example, the first housing 110 can comprise and being arranged in the face of the first base plate 111 of the first first type surface 150a of monocell 150 and outstanding and around the first rib 115 of monocell 150 from the first base plate 111.Similarly, the second housing 120 can comprise and being arranged in the face of the second base plate 121 of the second first type surface 150b of monocell 150 and outstanding and around the second rib 125 of monocell 150 from the second base plate 121.

Have substantially hexahedral piece shape if supposition monocell 150 is formed, the first first type surface 150a and the second first type surface 150b are the surface with maximum area, and can be disposed in opposite side.

The spatial accommodation G being limited by the first housing 110 and the second housing 120 can comprise monocell spatial accommodation G1 for holding monocell 150 and for holding the protective circuit module spatial accommodation G2 that monocell 150 is carried out to the circuit unit of the operation of charging and discharging for controlling.

For example, monocell spatial accommodation G1 can take the major part of spatial accommodation G, and can hold the monocell 150 that is applicable to quantity, to meet the required output performance of whole battery pack 100.For example, according to embodiments of the invention, six monocells 150 can be accommodated in monocell spatial accommodation G1.

Monocell 150 can be arranged to parallel to each other to form side by side equal height (level), or multiple monocell 150 can be stacked to form up/down height.Be arranged in parallel and can be combined with stacked arrangement.

For example, according to embodiments of the invention, four monocells 150 that are arranged side by side can form ground floor, and two monocells 150 disposed thereon can form the second layer.At length, four monocells 150 can be arranged side by side on the first housing 110, and two monocells 150 can be stacked on two monocells 150 that are positioned at two opposed end places.

In the time that monocell located adjacent one another 150 is stacked to form different layers, the second first type surface 150b of monocell 150 located adjacent one another can form stage portion 150c.In addition the second housing 120 being arranged on the second first type surface 150b, can have the stage portion 120a aiming at the profile of the second first type surface 150b.At length, the second housing 120 can have stage portion 120a, and at stage portion 120a place, two opposed ends of the second housing 120 on long side direction (x direction of principal axis) upwards depart from.It is stacking to form the monocell 150 of the second layer by selectivity that the stage portion 120a of the second housing 120 is formed close contact, firmly fixes the position of monocell 150, and make whole battery pack 100 compactnesses, and do not waste any space.

Monocell 150 is rechargeable secondary batteries, and for example can be lithium ion battery.Monocell 150 can comprise electrode assemblie and for hold electricity this utmost point assembly casing component 151.Although not shown, electrode assemblie can form by positive electrode plate, dividing plate and negative electrode plate being stacked and stacked structure being wound into film shape shape.Casing component 151 can be formed by aluminum or aluminum alloy.But, the invention is not restricted to this.

The flexible printed circuit board (FPCB) 140 that monocell 150 and protective circuit module 130 are electrically connected mutually can be disposed in monocell 150 outsides.FPCB140 can be provided for drawing the power being produced by monocell 150 or the wiring that from external charger, charging voltage is input to monocell 150.FPCB140 forms and is electrically connected with the electrode assemblie of monocell 150, and the power of self-electrode assembly is drawn out to outside in the future.

FPCB140 is electrically connected mutually monocell arranged adjacent one another 150.For example, FPCB140 can make to be arranged to monocell located adjacent one another 150 and be connected to each other to be connected in series monocell 150 with contrary polarity, or can make to be arranged to monocell located adjacent one another 150 with the identical polarity monocell 150 that is connected to each other to be connected in parallel.Be connected in series and be connected in parallel and can be combined.For example, the stacking monocell 150 of in the vertical direction can be connected in parallel, and the monocell 150 being simultaneously arranged side by side can be connected in series.

FPCB140 can comprise for make multiple monocells 150 be electrically connected mutually and form the wiring of charging and discharging path and for the dielectric film of external environment condition insulation.

Protective circuit module spatial accommodation G2 is formed in spatial accommodation G.Protective circuit module spatial accommodation G2 holds for controlling the protective circuit module 130 for monocell 150 being carried out to the operation of charging and discharging.For example; can measure the conditional-variable such as electric current and temperature about monocell 150 for the protective circuit module 130 of controlling for monocell 150 being carried out to the operation of charging and discharging; to monitor the condition of each monocell 150, and be used for monocell 150 to carry out the operation of charging and discharging based on this condition control.In addition, protective circuit module 130 can detect such as overcharging in advance, the fault of overdischarge and overcurrent, and carries out for stoping safety operation overheated and blast.

Protective circuit module 130 can be disposed in for monocell 150 being carried out to the charging and discharging path of charging and discharging, and controls the open and close of charging and discharging path.Correspondingly, protective circuit module 130 can comprise switchgear or analog.Can be disposed in the end of protective circuit module 130 for power being fed to the connector of main equipment.

Protective circuit module spatial accommodation G2 is for holding the protective circuit module 130 that is electrically connected to monocell 150; wherein protective circuit module spatial accommodation G2 can be disposed in the end of facing the terminal of monocell 150 in spatial accommodation G, to be connected with monocell 150.Here, the first flange unit 1141 and the second flange unit 1142 can be disposed in two opposite side portions of protective circuit module spatial accommodation G2.By effectively arranging the first flange unit 1141, the second flange unit 1142 and protective circuit module spatial accommodation G2, battery pack 100 can be compact, and do not waste any space.

Should be appreciated that exemplary embodiment described here should be only considered with the meaning of describing, but not object for limiting.Feature in each embodiment or the description of aspect typically should be considered to can be used for other similar characteristics or the aspect in other embodiment.

The explanation of Reference numeral

100: 110: the first housings of battery pack

111: the first base plates 114: flange unit

1142: the second flange unit, 1141: the first flange unit

114a: assembly unit 114b: intensity enhancing unit

115: first rib 115a: uneven portion

1151: thick portion 1152: thin portion

115b: par 117: clamping components

118: the first linkage units (connecting plate)

118 ': connection opening

120: the second housing 120a: the stage portion of the second housing

121: the second base plates 125: second rib

128: the second linkage units (hook portion) 130: protective circuit module

140: flexible printed circuit board 150: monocell

150a: the first first type surface 150b: the second first type surface

G: spatial accommodation G1: monocell spatial accommodation

G2: protective circuit module spatial accommodation C: assembling axis

Claims

1. a battery pack, comprising:

Monocell;

Housing, described housing comprises the first housing and the second housing being linked together and holds described monocell, wherein said the first housing comprises:

First rib, described first rib circumferentially extends and roughly limits around the monocell spatial accommodation for described monocell of the inside of described first rib around described the first housing, and described first rib has and comprises thick portion alternately and the ridge areas of thin portion.

2. battery pack according to claim 1, is further included in the flange unit on the outside of described first rib, and wherein said ridge areas is positioned on described first rib and contiguous described flange unit.

3. battery pack according to claim 2, wherein said flange unit comprises the lug boss that is configured to receive external equipment.

4. battery pack according to claim 2, wherein, in the time that described the first housing and described the second housing are coupled together, described flange unit is exposed.

5. battery pack according to claim 1, wherein said ridge areas is along whole extensions of described first rib.

6. battery pack according to claim 1, wherein said ridge areas is on the bight of described first rib.

7. battery pack according to claim 1, wherein said the first housing further comprises the first base plate, and wherein said first rib extends away from described the first base plate.

8. battery pack according to claim 2, wherein said flange unit is on the bight of described the first housing.

9. battery pack according to claim 2, wherein said flange unit comprises the first spaced flange unit and the second flange unit.

10. battery pack according to claim 9, further comprises protective circuit module, and wherein said first rib further limits protective circuit module spatial accommodation.

11. battery pack according to claim 10, wherein said protective circuit module is between described the first flange unit and described the second flange unit.

12. battery pack according to claim 1, wherein said ridge areas comprises the first ridge areas and the second ridge areas, and wherein said first rib has the flat site between described the first ridge areas and described the second ridge areas.

13. battery pack according to claim 12, wherein said flat site has connection opening, and this connection opening is configured to receive securing member, so that described the first housing is connected to described the second housing.

14. battery pack according to claim 13, further comprise the linkage unit that deviates from described first rib, and wherein said connection opening is on described linkage unit.

15. battery pack according to claim 12, the thickness of wherein said flat site and the thickness of described thick portion equate.

16. battery pack according to claim 1, wherein said ridge areas comprises spaced multiple ridge areas.

17. battery pack according to claim 1, the thickness of wherein said thick portion and described thin portion is equal to or less than the thickness of described the first base plate.

18. battery pack according to claim 1, wherein said battery pack comprises multiple described monocells, the plurality of monocell is stacked to form step structure.

19. battery pack according to claim 18, wherein said the second housing comprises the second base plate, this second base plate has step constructs to hold the described step structure of multiple described monocells.

20. battery pack according to claim 1, wherein said thick portion is outstanding towards described monocell with respect to described thin portion.