CN208690351U

CN208690351U - Fixed frame, battery unit and battery modules

Info

Publication number: CN208690351U
Application number: CN201821509996.9U
Authority: CN
Inventors: 余凯勤
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2019-04-02
Anticipated expiration: 2028-09-14

Abstract

The utility model provides a kind of fixed frame, battery unit and battery modules.Fixed frame includes: bracket component and heat sink assembly.Bracket component includes heat-conducting plate.Heat-conducting plate includes: main part；Extension is connected to main part and bends in the width direction from main part.Heat sink assembly includes: elastic substrate layer；And heat dissipating layer, it is set to the surface of elastic substrate layer, heat sink assembly is formed with the inflection section of inflection in the width direction, and the heat dissipating layer of inflection section is located at outside to surround corresponding elastic substrate layer, and heat dissipating layer of the inflection section in the side of short transverse is directly posted by the corresponding extension of heat-conducting plate.When fixed frame is for battery unit and then is used for battery modules, the thermally conductive pathways of battery unit are effectively guaranteed, the heat dissipation effect of battery modules is improved.

Description

Fixed frame, battery unit and battery modules

Technical field

The utility model relates to field of batteries more particularly to a kind of fixed frames, battery unit and battery modules.

Background technique

It relies primarily on heat-conducting plate using the heat dissipation of the battery modules of bag type secondary battery at present to radiate, due to heat-conducting plate The flatness error of bottom causes bad with contacts baseplate, reduces the heat dissipation performance of battery modules.To improve battery modules Heat-sinking capability, usually just like under type:

1. the outside of battery modules uses closed outline border, in battery mould after bag type secondary battery is assembled into battery unit It fills heat-conducting glue in group to radiate, since existing heat-conducting glue thermal coefficient is far below metal, when the powerful charge and discharge of progress When battery unit heat production it is serious, battery modules bulk temperature is higher；In addition, heat-conducting glue compressibility is poor, battery unit circulation is swollen It can not be compressed after swollen, cause battery modules expansive force big, dilatancy is serious.

2. gluing to be between heat-conducting plate bottom and the bottom plate of battery modules to absorb the flatness error between multiple battery units, But bottom gap-filling glue thermal resistance is larger, reduces battery modules overall heat dissipation ability.

Utility model content

In view of the problems in the background art, the purpose of this utility model is to provide a kind of fixed frames, battery unit And battery modules, it can guarantee the thermally conductive pathways of battery unit, improve the heat-sinking capability of battery modules.

To achieve the goals above, the utility model provides a kind of fixed frame comprising: bracket component and cooling fin group Part.Bracket component includes heat-conducting plate.Heat-conducting plate includes: main part；Extension is connected to main part and from main part along width side To bending.Heat sink assembly includes: elastic substrate layer；And heat dissipating layer, it is set to the surface of elastic substrate layer, heat sink assembly It is formed with the inflection section of inflection in the width direction, the heat dissipating layer of inflection section is located at outside to surround corresponding elastic substrate layer, returns Heat dissipating layer of the trisection in the side of short transverse is directly posted by the corresponding extension of heat-conducting plate.

Inflection section includes: first part, is extended in the width direction, and the heat dissipating layer of first part is located at the one of short transverse Side；Second part extends in the width direction, and the heat dissipating layer of second part is located at the opposite other side of short transverse；Third portion Point, from first part's extension, inflection and it is connected to second part.

In an embodiment of fixed frame, heat sink assembly is also formed with main paragraph, and main paragraph extends simultaneously along short transverse It is connected to one end of the first part of inflection section, the elastic substrate layer of main paragraph is posted by the main part of heat-conducting plate.

In an embodiment of fixed frame, the extension of heat-conducting plate is two, is connected to the two of the short transverse of main part Side；The inflection of heat sink assembly Duan Weiyi, is connected to the side of the short transverse of main paragraph, the inflection section is posted by thermally conductive The extension of the short transverse side of plate.

To achieve the goals above, the utility model additionally provides a kind of battery unit comprising bag type secondary battery, electricity Pool unit further includes above-mentioned fixed frame；Wherein the side of the width direction of the main part of heat-conducting plate is provided with the secondary electricity of pouch-type Pond.

In an embodiment of battery unit, heat sink assembly is also formed with main paragraph, and main paragraph extends along short transverse And it is connected to inflection section, the elastic substrate layer of main paragraph is posted by the main part of heat-conducting plate；Battery unit includes two pouch-type two Primary cell, one of bag type secondary battery are posted by the main part of heat-conducting plate, another bag type secondary battery is posted by heat dissipation The surface of the heat dissipating layer of the main paragraph of piece component.

In an embodiment of battery unit, the extension of the heat-conducting plate of battery unit is two, is connected to main part The two sides of short transverse；The inflection of heat sink assembly Duan Weiyi, is connected to the side of the short transverse of main paragraph, the inflection Section is posted by the extension of the short transverse side of heat-conducting plate.

To achieve the goals above, the utility model additionally provides a kind of battery unit comprising: heat sink assembly and bag Type secondary cell.Heat sink assembly includes: elastic substrate layer；And heat dissipating layer, it is set to the surface of elastic substrate layer；Cooling fin Component is formed there are two main paragraph and the inflection section of inflection, the heat dissipating layer of inflection section are located at outside to surround correspondence in the width direction Elastic substrate layer；Two main paragraphs extend along short transverse and are connected to the both ends of inflection section, and two main paragraphs dissipate Thermosphere is located at the opposite outside of width direction, and the elastic substrate layer of two main paragraphs is in the width direction against each other.Pouch-type two Primary cell is posted by the heat dissipating layer of the corresponding main paragraph of heat sink assembly in the width direction.

Inflection Duan Weiyi, it is connected to the side of the short transverse of main paragraph.

To achieve the goals above, the utility model additionally provides a kind of battery modules comprising: peripheral frame and multiple above-mentioned Battery unit.Peripheral frame is made of roof, two side walls and bottom plate and surrounds the accommodating space of the both-side opening of length direction. Multiple battery units are housed in accommodating space and the heat dissipating layer of the inflection section of the short transverse side of each battery unit is posted by The upper surface of bottom plate.

The beneficial effects of the utility model are as follows: when the battery unit of the utility model is used for battery modules, inflection section Heat dissipating layer and bottom plate be in close contact, be effectively guaranteed the heat dissipation path of battery unit, improve battery modules heat dissipation effect Fruit.

Detailed description of the invention

Fig. 1 is the stereogram exploded view of battery modules according to the present utility model.

Fig. 2 is the assembling figure of Fig. 1.

Fig. 3 is the cross-sectional view of Fig. 2.

Fig. 4 is the partial enlarged view of Fig. 3.

Fig. 5 is the exploded view of an embodiment of battery unit according to the present utility model.

Fig. 6 is the enlarged drawing of the encircled portion of Fig. 5.

The schematic diagram of another embodiment of Fig. 7 battery unit according to the present utility model, wherein only showing heat sink assembly.

Fig. 8 is the partial enlarged view of Fig. 7.

Fig. 9 is the perspective view of bag type secondary battery.

Figure 10 is the cross-sectional view of an embodiment of fixed frame according to the present utility model.

Figure 11 is the cross-sectional view of another embodiment of the fixed frame similar with Figure 10.

Figure 12 is the partial enlarged view of Figure 10.

Wherein, the reference numerals are as follows:

212 supporting block of M battery modules

22 heat sink assembly of M1 peripheral frame

221 elastic substrate layer of M11 roof

222 heat dissipating layer of M12 side wall

223 inflection section of M13 bottom plate

M14 accommodating space 223A first part

M2 battery unit 223B second part

1 bag type secondary battery 223C Part III

11 encapsulating film, 224 main paragraph

12 electrode terminal M3 cushions

2 fixed frame M4 end plates

21 bracket component M5 electric connecting sheets

211 heat-conducting plate L length directions

211A main part W width direction

211B extension H short transverse

Specific embodiment

Attached drawing shows the embodiments of the present invention, and will be appreciated that the disclosed embodiments are only that this is practical new The example of type, the utility model can be implemented in a variety of manners, and therefore, detail disclosed herein, which should not be construed, to be limited System, but only as the basis of claim and as the basis of representative for instructing those of ordinary skill in the art with various Mode implements the utility model.

In addition, upper, lower, left, right, front and rear etc. are used to illustrate fixed frame, battery unit and the electricity in the present embodiment The statement in the instruction direction of the operation and construction of each component of Chi Mo group is not absolute but opposite, and although when fixing These instructions are appropriate when each component of frame, battery unit and battery modules is in position shown in figure, but work as these When position change, these directions should have different explanations, with the correspondence change.

Battery modules M according to the present utility model includes peripheral frame M1 and multiple battery unit M2.Battery modules M further includes two A cushion M3, two end plate M4 and electric connecting sheet M5.

As shown in Figure 1, peripheral frame M1 is made of roof M11, two side walls M12 and bottom plate M13 and surrounds length direction L's The accommodating space M14 of both-side opening.Specifically, in one embodiment, the roof M11 and two side walls M12 of peripheral frame M1 are integrally curved Foldable type, and bottom plate M13 is fixed on the lower end of two side walls M12 via welding or mechanical erection.In another embodiment, peripheral frame Roof M11, the two side walls M12 and bottom plate M13 of M1 is integrally formed.In general, external cooling system is set under bottom plate M13 Surface.

Multiple battery unit M2 are housed in accommodating space M14.

Two cushion M3 are clamped in respectively between each side wall M12 of outline border and adjacent cell M2, are battery modules M Expansion space is provided during charge and discharge cycles.

Electric connecting sheet M5 is electrically connected to the electrode terminal 12 described below of corresponding battery unit M2.

As depicted in figs. 1 and 2, two end plate M4 are fixed on the both ends of the length direction L of peripheral frame M1 to close peripheral frame M1's The opening of the two sides length direction L.

As shown in figure 5, battery unit M2 includes bag type secondary battery 1 and fixed frame 2, bag type secondary battery 1 is fixed on Determine on frame 2.The quantity of bag type secondary battery 1 can be one, two or more, it can be selected according to concrete condition.

As shown in figure 9, bag type secondary battery 1 includes: electrode assembly (not shown)；Encapsulating film 11, electrode assembly is encapsulated in In encapsulating film 11；And opposite polarity electrode terminal 12, it is electrically connected to electrode assembly and protrudes from encapsulating film 11.Encapsulating film 11 Inside also it is packaged with electrolyte (not shown).Electrode assembly includes that opposite polarity pole piece (not shown) and isolation film (do not show Out), pole piece includes the active material layer of collector and setting on a current collector.Electrode assembly can use winding method or lamination Mode forms.Encapsulating film 11 is by including that the laminate of polymeric layer and metal layer is made.Metal layer can use copper material or aluminium Or steel, when using aluminium, encapsulating film 11 can be referred to as aluminum plastic film.The two sides of the L along its length of electrode terminal 12 in figure Prominent, certain opposite polarity electrode terminal 12 can also can select as the case may be from the ipsilateral protrusion of length direction L.

In one embodiment, as shown in Figure 10 to Figure 12, fixed frame 2 includes: bracket component 21 and heat sink assembly 22. Bracket component 21 includes: heat-conducting plate 211 and supporting block 212.

Heat-conducting plate 211 includes: main part 211A；Extension 211B is connected to main part 211A and from the edge main part 211A Width direction W bending.Supporting block 212 is fixed on the two sides of the length direction L of heat-conducting plate 211.The main part 211A of heat-conducting plate 211 The side of width direction W be provided with bag type secondary battery 1.

As shown in Fig. 4 and Figure 12, heat sink assembly 22 includes: elastic substrate layer 221；And heat dissipating layer 222, it is set to bullet The surface of property substrate layer 221.

The material of elastic substrate layer 221 can be foam elastomeric material, guarantee the contact of heat-conducting plate 211 and heat dissipating layer 222, Foam can play the effect that two sides bag type secondary battery 1 is heat-insulated simultaneously.Heat dissipating layer 222 can be the thermal diffusivities such as copper foil or graphene The good thin material of energy.

In one embodiment, as shown in Figure 5 and Figure 6, heat sink assembly 22 is formed with the inflection section of W inflection in the width direction 223 and extend and be connected to the main paragraph 224 of inflection section 223 along height direction H.The heat dissipating layer 222 of inflection section 223 is located at outer To surround corresponding elastic substrate layer 221, heat dissipating layer 222 of the inflection section 223 in the side of height direction H, which is directly posted by, is led for side The corresponding extension 211B of hot plate 211.The heat dissipating layer 222 of the other side of the height direction H of inflection section 223 is posted by bottom plate The upper surface of M13.The elastic substrate layer 221 of main paragraph 224 is posted by the main part 211A of heat-conducting plate 211.Certainly, in another reality It applies in example, heat sink assembly 22 can also be simply formed with inflection section 223.

In the above-described embodiments, as shown in Figure 5, it is preferable that battery unit M2 includes two bag type secondary batteries 1, wherein One bag type secondary battery 1 is posted by the main part 211A of heat-conducting plate 211, another bag type secondary battery 1 is posted by cooling fin The surface of the heat dissipating layer 222 of the main paragraph 224 of component 22.L is prominent along its length for the electrode terminal 12 of each bag type secondary battery 1 In supporting block 212.

As shown in Figure 3 and Figure 4, inflection section 223 is set between the extension 211B of heat-conducting plate 211 and bottom plate M13, and is returned The extension 211B of heat-conducting plate 211 and bottom plate M13 is indirectly connected with by the heat dissipating layer 222 of trisection 223, so that and heat-conducting plate The heat that the bag type secondary battery 1 that 211 main part 211A is directly contacted generates is transmitted via the main part 211A of heat-conducting plate 211 To extension 211B, the heat dissipating layer 222 of extension 211B and inflection section 223 is in close contact and transfers heat to heat dissipating layer 222, Then bottom plate M13 is transferred heat to via heat dissipating layer 222, and the heat that the bag type secondary battery 1 of the other side generates is via scattered The heat dissipating layer 222 of the main paragraph 224 of backing component 22 is directly passed to bottom plate M13, and final heat is arranged on the downside of bottom plate M13 External cooling system take away.Since the elastic substrate layer 221 of inflection section 223 is arranged along height direction H compression in extension Between 211B and bottom plate M13, so that extension 211B and bottom plate M13 are in close contact with heat dissipating layer 222 respectively, effectively prevent existing There is the problem of bottom and bottom plate M13 insufficient contact of the battery unit M2 in technology, ensure that the heat dissipation road of heat-conducting plate 211 Diameter improves the heat-sinking capability of battery modules M；Furthermore, it is not necessary that filling battery unit M2 using the gap-filling glue of the prior art Bottom and bottom plate M13 between gap, thus avoid thermal resistance caused by gap-filling glue and increase problem, and reduce gluing work Skill simplifies assembling procedure.In two embodiments of above-mentioned peripheral frame M1, it is preferable that bottom plate M13 is via welding or mechanical peace Dress is fixed on the lower end of two side walls M12, so that integrally formed peripheral frame M1 be avoided to scratch heat dissipating layer in assembling process bottom plate M13 222。

Specifically, as shown in fig. 6, inflection section 223 includes: first part 223A, W extends in the width direction, first part The heat dissipating layer 222 of 223A is located at the side of height direction H；Second part 223B, W extends in the width direction, second part 223B Heat dissipating layer 222 be located at the opposite other side of height direction H；Part III 223C, simultaneously from first part 223A extension, inflection It is connected to second part 223B.This structure of inflection section 223 ensure that the heat dissipating layer 222 of inflection section 223 is located at outside, so that Heat dissipating layer 222 can contact with the extension 211B of bottom plate M13 and battery unit M2 thermally conductive to realize respectively.

Main paragraph 224 extends along height direction H and is connected to one end of the first part 223A of inflection section 223.

Main paragraph 224 includes elastic substrate layer 221, and the elastic substrate layer 221 of main paragraph 224 is posted by heat-conducting plate 211 Main part 211A, during the battery unit M2 charge and discharge cycles of battery modules M, main paragraph 224 can absorb pouch-type two The expansion of primary cell 1 simplifies the structure of battery modules M；In addition, battery unit M2 uses the main part 211A of heat-conducting plate 211 It radiates jointly with the heat dissipating layer 222 of main paragraph 224, elastic substrate layer 221 has heat-blocking action, and the bullet of main paragraph 224 Property substrate layer 221 is between main part 211A and heat dissipating layer 222, when there is thermal runaway situation in single bag type secondary battery 1, Elastic substrate layer 221 can delay thermal runaway to avoid thermal runaway chain reaction, improve the damage of other bag type secondary batteries 1 The safety of battery modules M.

The fixed frame 2 of battery unit M2 can there are many design forms, in one embodiment, as shown in Figure 10, heat-conducting plate 211 Extension 211B be two, be connected to the two sides of the height direction H of main part 211A；The inflection section 223 of heat sink assembly 22 It is one, is connected to the side of the height direction H of main paragraph 224, the inflection section 223 is posted by the height side of heat-conducting plate 211 To between the extension 211B and bottom plate M13 of side H.

In another embodiment, as shown in figure 11, the extension 211B of heat-conducting plate 211 is two and opposite main part 211A Positioned at the same side of width direction W；The inflection section 223 of heat sink assembly 22 is two, is connected to the height of main paragraph 224 The two sides of direction H, each inflection section 223 are posted by the extension 211B of the respective side of the height direction H of heat-conducting plate 211, it is specific and Speech, one of inflection section 223 are posted by between the extension 211B and bottom plate M13 of the height direction H side of heat-conducting plate 211, Another inflection section 223 is posted by between the extension 211B and roof M11 of the height direction H other side of heat-conducting plate 211, at this In embodiment, superposed extension 211B can equally radiate outward via inflection section 223, roof M11.Due to external cold But system is usually provided in the downside of bottom plate M13, it is preferable that inflection section 223 only needs the height direction H one that heat-conducting plate 211 is arranged in Between the extension 211B and bottom plate M13 of side.

In another embodiment, fixed frame 2 can cancel the use of heat-conducting plate 211, that is, heat-conducting plate 211 can be by another The heat sink assembly 22 of kind structure replaces.In this embodiment, specifically, (212 He of supporting block is not shown as shown in Figure 7 and Figure 8 Bag type secondary battery 1), battery unit M2 includes: fixed frame 2 and bag type secondary battery 1.Fixed frame 2 includes heat sink assembly 22 With supporting block 212.Heat sink assembly 22 includes: elastic substrate layer 221；And heat dissipating layer 222, it is set to elastic substrate layer 221 Surface；The formation of heat sink assembly 22 the inflection section 223 of W inflection, inflection section 223 there are two main paragraph 224 and in the width direction Heat dissipating layer 222 be located at outside to surround corresponding elastic substrate layer 221；Two main paragraphs 224 extend and divide along height direction H It is not connected to the both ends of inflection section 223, the heat dissipating layer 222 of two main paragraphs 224 is located at the opposite outside of width direction W, and two W is against each other in the width direction for the elastic substrate layer 221 of a main paragraph 224.Supporting block 212 is fixed on the length of heat sink assembly 22 Spend the both ends of direction L.

Bag type secondary battery 1 in the width direction W be posted by heat sink assembly 22 corresponding main paragraph 224 heat dissipating layer 222.L protrudes from supporting block 212 to the electrode terminal 12 of bag type secondary battery 1 along its length.Preferably, bag type secondary battery 1 It is two, is posted by the heat dissipating layer 222 of the corresponding main paragraph 224 of heat sink assembly 22 respectively.

In this embodiment, the bag type secondary battery 1 of the two sides of battery unit M2 transfers heat to corresponding heat dissipating layer 222, the bottom plate M13 contacted with heat dissipating layer 222 is then passed to via heat dissipating layer 222, then bottom plate M13 transfers heat to outer Portion's cooling system realizes the heat dissipation of battery modules M.Two main paragraphs, the 224 elastic substrate layer 221 of heat sink assembly 22 is along width It spends direction W against each other, can either realize conductive force by being located at the heat dissipating layer 222 in outside, while to heat sink assembly 22 The bag type secondary battery 1 of two sides also acts as heat-insulated effect, prevents hot when thermal runaway situation occurs in single bag type secondary battery 1 Damage of the amount sprawling to other bag type secondary batteries 1, avoids thermal runaway chain reaction, improves the safety of battery modules M；This Outside, elastic substrate layer 221 can absorb the dilatancy that battery unit M2 occurs during charge and discharge cycles.

In the above-described embodiments, inflection section 223 can be two, be connected to the two of the height direction H of main paragraph 224 Side.Inflection section 223 can also be one, be connected to the side of the height direction H of main paragraph 224.Inflection section 223 is directly and bottom plate M13 contact, ensure that the heat dissipation path of battery unit M2, improves the heat-sinking capability of battery modules M.

Claims

1. a kind of fixed frame characterized by comprising

Bracket component (21), bracket component (21) include:

Heat-conducting plate (211), heat-conducting plate (211) include:

Main part (211A)；

Extension (211B) is connected to main part (211A) and bends in the width direction (W) from main part (211A)；

Heat sink assembly (22), comprising: elastic substrate layer (221)；And heat dissipating layer (222), it is set to elastic substrate layer (221) Surface, heat sink assembly (22) is formed with the inflection section (223) of (W) inflection in the width direction, the heat dissipating layer of inflection section (223) (222) it is located at outside to surround corresponding elastic substrate layer (221), heat dissipation of the inflection section (223) in the side of short transverse (H) Layer (222) is directly posted by the corresponding extension (211B) of heat-conducting plate (211).

2. fixed frame (2) according to claim 1, which is characterized in that inflection section (223) includes: first part (223A), (W) extends in the width direction, and the heat dissipating layer (222) of first part (223A) is located at the side of short transverse (H)；Second part (223B), in the width direction (W) extend, the heat dissipating layer (222) of second part (223B) be located at short transverse (H) on the contrary it is another Side；Part III (223C) from first part (223A) extension, inflection and is connected to second part (223B).

3. fixed frame (2) according to claim 2, which is characterized in that heat sink assembly (22) is also formed with main paragraph (224), main paragraph (224) extends along short transverse (H) and is connected to one end of the first part (223A) of inflection section (223), The elastic substrate layer (221) of main paragraph (224) is posted by the main part (211A) of heat-conducting plate (211).

4. fixed frame (2) according to claim 3, which is characterized in that the extension (211B) of heat-conducting plate (211) is two It is a, it is connected to the two sides of the short transverse (H) of main part (211A)；The inflection section (223) of heat sink assembly (22) is one, even It is connected to the side of the short transverse (H) of main paragraph (224), the inflection section (223) is posted by the short transverse of heat-conducting plate (211) (H) extension (211B) of side.

5. a kind of battery unit, including bag type secondary battery (1), which is characterized in that battery unit (M2) further includes according to right It is required that fixed frame described in 1 or 2 (2)；The wherein side setting of the width direction (W) of the main part (211A) of heat-conducting plate (211) There is bag type secondary battery (1).

6. battery unit (M2) according to claim 5, which is characterized in that heat sink assembly (22) is also formed with main paragraph (224), main paragraph (224) extends and is connected to inflection section (223), the elastic substrate layer of main paragraph (224) along short transverse (H) (221) it is posted by the main part (211A) of heat-conducting plate (211)；Battery unit (M2) includes two bag type secondary batteries (1), wherein One bag type secondary battery (1) is posted by the main part (211A) of heat-conducting plate (211), another bag type secondary battery (1) reclines In the surface of the heat dissipating layer (222) of the main paragraph (224) of heat sink assembly (22).

7. battery unit (M2) according to claim 6, which is characterized in that the heat-conducting plate (211) of battery unit (M2) Extension (211B) is two, is connected to the two sides of the short transverse (H) of main part (211A)；The inflection of heat sink assembly (22) Section (223) is one, is connected to the side of the short transverse (H) of main paragraph (224), the inflection section (223) is posted by thermally conductive The extension (211B) of side short transverse (H) of plate (211).

8. a kind of battery unit characterized by comprising

Heat sink assembly (22), comprising: elastic substrate layer (221)；And heat dissipating layer (222), it is set to elastic substrate layer (221) Surface；Heat sink assembly (22) forms the inflection section (223) there are two main paragraph (224) and (W) inflection in the width direction, returns The heat dissipating layer (222) of trisection (223) is located at outside to surround corresponding elastic substrate layer (221)；Two main paragraphs (224) are along height Degree direction (H) extends and is connected to the both ends of inflection section (223), and the heat dissipating layer (222) of two main paragraphs (224) is located at width The opposite outside of direction (W) is spent, (W) against each other in the width direction for the elastic substrate layer (221) of two main paragraphs (224)； And

Bag type secondary battery (1), (W) is posted by dissipating for the corresponding main paragraph (224) of heat sink assembly (22) in the width direction Thermosphere (222).

9. battery unit (M2) according to claim 8, which is characterized in that inflection section (223) is one, is connected to main body The side of the short transverse (H) of section (224).

10. a kind of battery modules characterized by comprising

Peripheral frame (M1) constitutes and surrounds the two of length direction (L) by roof (M11), two side walls (M12) and bottom plate (M13) The accommodating space (M14) of side opening；

Multiple battery units (M2) according to any one of claim 5-9, are housed in accommodating space (M14) and each electricity The heat dissipating layer (222) of the inflection section (223) of side short transverse (H) of pool unit (M2) is posted by the upper surface of bottom plate (M13).