CN209104198U - Battery modules - Google Patents

Abstract

The utility model provides a kind of battery modules comprising: multiple batteries, multiple battery through-thickness are arranged side by side, each battery includes shell, shell includes two the first faces, and described two first faces through-thickness is opposite each other, and each first face includes the first face periphery；First face through-thickness of the shell of each adjacent two battery is relative to each other, and the first face periphery through-thickness of the shell of two neighboring battery is relative to each other.Battery modules further include connection strap, and connection strap is arranged along the first opposite face periphery of the shell of two neighboring battery, and the shell of two neighboring battery is fixed together by connection strap；Shell includes shell and end cap；Shell includes the opening of short transverse, and shell has the outer end face of short transverse in opening；End cap includes the joint face in the outside of short transverse；End cap is overlapped on the outer end face of shell or end cap is located in the opening of shell and the joint face of end cap is not protruded outward in short transverse with respect to the outer end face of shell.

Description

Battery modules

Technical field

The utility model relates to field of batteries more particularly to a kind of battery modules.

Background technique

In electric vehicle and energy storage device field, battery is generallyd use as the energy, multiple batteries are arranged side by side group Battery modules are dressed up, multiple battery modules are then assembled into battery pack and are installed in electric vehicle or energy storage device.Each battery includes Shell.In the prior art, generally use bonded adhesives be bonded in shell big face middle position to be arranged side by side multiple Battery links together.In battery modules assembling process, the big face for needing that bonded adhesives is made as often as possible to occupy shell, to guarantee Bond area big as far as possible, this result in using bonded adhesives amount it is very big.In addition, in order to guarantee that battery can pass through bonded adhesives Bonding will not move, and bonded adhesives also needs to carry out curing process, and the time that a large amount of structure adhesive curing needs is long, causes to give birth to Produce low efficiency.

Utility model content

In view of the problems in the background art, the purpose of this utility model is to provide a kind of battery modules, can be big The big usage amount for reducing the material to link together to multiple batteries can improve production efficiency and energy density in turn.

To achieve the goals above, the utility model provides a kind of battery modules comprising: multiple batteries, Duo Ge electricity Pond through-thickness is arranged side by side, and each battery includes shell, and shell includes two the first faces, and described two first faces are along thickness side To each other on the contrary, each first face includes the first face periphery；Wherein, the first face through-thickness of the shell of each adjacent two battery Opposite to each other, the first face periphery through-thickness of the shell of two neighboring battery is relative to each other.Battery modules further include connection Item, connection strap is along the opposite first face periphery setting of the shell of two neighboring battery, and connection strap is by two neighboring battery Shell be fixed together.Shell includes shell and end cap.Shell includes the opening of short transverse, and shell has in opening There is the outer end face of short transverse；End cap includes the joint face in the outside of short transverse.End cap is overlapped on the outer end face of shell, Or end cap is located in the opening of shell and the joint face of end cap is not protruded outward in short transverse with respect to the outer end face of shell.

In one embodiment, the first face peripheral region of two neighboring battery is formed with accommodating space, and connection strap is set to receipts Hold in space.

In one embodiment, it is provided between two the first faces of the shell of two neighboring battery in short transverse and width The gap of direction perforation, the gap form accommodating space in two opposite the first face peripheral regions.

In one embodiment, shell includes: two big faces, and through-thickness is opposite each other, and each loaf includes width direction The wide Xiang Yuan in face two big；Each first face periphery of shell includes the wide Xiang Yuan in face two big in the one big face of shell；Adjacent two The big face of opposite two of the shell of a battery is wide to the first accommodating space of formation at edge, and accommodating space includes that the first receiving is empty Between, connection strap is provided in the first accommodating space.

In one embodiment, shell further include: two facets, opposite each other in the width direction, each facet is respectively at two The opposite two big face in big face is wide to being connected to two big faces at edge；Opposite two facet of the shell of two neighboring battery Be flared out respectively from the opposite big face of the shell of two neighboring battery is wide to edge, with two big face it is wide at edge to shape At the first accommodating space.

In one embodiment, opposite two facet of the shell of two neighboring battery is respectively from the shell of two neighboring battery The opposite big face of body is wide to be flared out to edge with cambered surface.

In one embodiment, end cap includes reciprocal two long faces of through-thickness, and each long face includes short transverse Long face height to outer rim；Each first face periphery of shell includes the long face height of end cap to outer rim；The end cap of two neighboring battery The second accommodating space is formed between two opposite long faces, accommodating space includes the second accommodating space, the receiving of the second accommodating space There is connection strap.

In one embodiment, two opposite long faces are respectively formed notch, and opposite notch forms the second accommodating space.

In one embodiment, the big face through-thickness of the shell of each long face relative thickness direction the same side of each end cap to Bias internal, so as to groove is formed between each long face and the outer end face of the short transverse of shell, the groove between two neighboring end cap Form the second accommodating space.

In one embodiment, shell further include: two facets, opposite each other in the width direction, each facet is respectively at two The opposite two big face in big face is wide to being connected to two big faces at edge；Connection strap does not protrude the vertex of facet in the width direction.

In one embodiment, end cap is equipped with electrode terminal, and connection strap is along short transverse not projection electrode terminal.

In one embodiment, the shell of each battery includes being exposed to outer outer surface, and the shell of each battery at least contains outer The part on surface is plastics, and connection strap is plastics.

The beneficial effects of the utility model are as follows: compared to the middle position in the big face for being bonded in battery using bonded adhesives Technical solution, in the present invention, connection strap along the shell of two neighboring battery opposite first face periphery setting and The shell of two neighboring battery is fixed together by connection strap, is substantially reduced, in turn to the usage amount of the material of connection strap Improve production efficiency and energy density.

Detailed description of the invention

Fig. 1 is the exploded perspective view of an embodiment of battery modules according to the present utility model.

Fig. 2 is the exploded perspective view of an embodiment of the battery of battery modules in Fig. 1.

Fig. 3 is the exploded perspective view of another angle of the battery of Fig. 2.

Fig. 4 is the assembling stereogram of the battery of Fig. 2.

Fig. 5 is the assembling stereogram of another angle of the battery of Fig. 4.

Fig. 6 is the assembling stereogram of another embodiment of the battery of the battery modules of Fig. 1.

Fig. 7 is the exploded perspective view of the another embodiment of the battery of the battery modules of Fig. 1.

Fig. 8 is the assembling stereogram of the battery of Fig. 7.

Fig. 9 is the assembling stereogram of another angle of the battery of Fig. 8.

Figure 10 is a perspective view of an embodiment of the two neighboring battery of the battery modules of Fig. 1.

Figure 11 is the cutaway drawing of the two neighboring battery of Figure 10, and wherein connection strap is not shown.

Figure 12 is the cutaway drawing of the two neighboring battery of Figure 11, and wherein connection strap is shown.

Figure 13 is the enlarged drawing of the encircled portion of Figure 12.

Figure 14 is the cutaway drawing of another embodiment of two neighboring battery corresponding with Figure 11, and wherein connection strap does not show Out.

Figure 15 is another cutaway drawing of the two neighboring battery of Figure 10, and wherein connection strap is shown and the range of groove is used Dotted line is shown.

Figure 16 is the enlarged drawing of the encircled portion of Figure 15, and wherein connection strap is not shown.

Figure 17 is the enlarged drawing of the another embodiment of two neighboring battery corresponding with Figure 15, and wherein the range of notch is empty Line is shown and connection strap is not shown.

Figure 18 is the enlarged drawing of the another embodiment of two neighboring battery corresponding with Figure 15, and wherein the range of notch is empty Line is shown and connection strap is not shown.

Figure 19 is the enlarged drawing of a further embodiment of two neighboring battery corresponding with Figure 15, and wherein connection strap is not shown.

Wherein, the reference numerals are as follows:

1 battery

T thickness direction

H short transverse

W width direction

11 shells

The first face F111

The first face P111 periphery

The first face E1111 Gao Xiangyuan

The wide Xiang Yuan in the first face E1112

The second face F112

F113 third face

111 shells

1111 big faces

The big face periphery of P1111

The big face Gao Xiangyuan of E11111

The wide Xiang Yuan in the big face E11112

1112 facets

S1 tapered plane

S2 cambered surface

The vertex V1112

1113 link surfaces

1114 outer end faces

1115 openings

112 end caps

1121 long faces

P1121 long face periphery

E11211 long face height is to outer rim

E11212 long face height is to inner edge

The wide Xiang Yuan of E11213 long face

N1121 notch

The inclined-plane S3

S4 cascaded surface

1122 short faces

1123 joint faces

1124 mounting holes

12 electrode terminals

13 electrode assemblies

131 tabs

14 switching pieces

R accommodating space

The first accommodating space of R1

The second accommodating space of R2

G1 groove

The gap G

2 connection straps

3 outline borders

31 accommodating chambers

311 openings

4 end plates

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 each structure of battery modules and battery in the present embodiment The statement in the instruction direction of the operation and construction of part is not absolute but opposite, and although each when battery modules and battery These instructions are appropriate when component is in position shown in figure, but when these position changes, these directions should have not Same explanation, with the correspondence change.

Fig. 1 is the exploded perspective view of an embodiment of battery modules according to the present utility model.

Referring to Fig.1, battery modules according to the present utility model include multiple batteries 1 and connection strap 2.Multiple 1 edges of battery Thickness direction T is arranged side by side.In addition, battery modules may also include outline border 3 and two end plates 4, referring to Fig.1, outline border 3 includes receiving Chamber 31, accommodating chamber 31 include opening 311 at opposite both ends.The multiple batteries 1 being arranged side by side are contained in accommodating chamber 31.Two A end plate 4 is sealingly fastened in the opening 311 at the both ends of outline border 3.

Fig. 2 is the exploded perspective view of an embodiment of the battery of battery modules in Fig. 1.Fig. 3 is another angle of the battery of Fig. 2 The exploded perspective view of degree.Fig. 4 is the assembling stereogram of the battery of Fig. 2.Fig. 5 is that the assembling of another angle of the battery of Fig. 4 is three-dimensional Figure.Fig. 6 is the assembling stereogram of another embodiment of the battery of the battery modules of Fig. 1.Fig. 7 is the battery of the battery modules of Fig. 1 Another embodiment exploded perspective view.Fig. 8 is the assembling stereogram of the battery of Fig. 7.Fig. 9 is another angle of the battery of Fig. 8 Assembling stereogram.

Referring to Fig. 2 to Fig. 9, each battery 1 includes shell 11.Referring to Fig. 2, Fig. 3 and Fig. 7, each battery 1 may also include electrode tip Son 12, electrode assembly 13 and switching piece 14.Each battery 1 may also include the electrolyte (not shown) in shell 11.

Shell 11 includes the end cap 112 of shell 111 with the end for the height direction H for being installed on shell 111.

Shell 111 includes two big face 1111 and two facets 1112.

1111 through-thickness T of face two big is opposite each other.Major face 1111 includes big face periphery P1111.Big face periphery P1111 includes that the two big face of big face height to the edge E11111 and width direction W of height direction H are wide to edge E11112.

W is opposite each other in the width direction for two facets 1112.Each facet 1112 is respectively in the opposite of two big face 1111 Two big face is wide to being connected to two big face 1111 at edge E11112.

The shape of each facet 1112 can be determined according to actual needs.Each facet 1112 may include cambered surface S2.In addition, cambered surface S2 can substitute for aftermentioned tapered plane S1.The tapered plane of opposite two facet 1112 of the shell 111 of each adjacent two battery 1 S1 or cambered surface S2 setting is shaped to aftermentioned first accommodating space R1.Based on the shape of each facet 1112, each facet 1112 has The vertex V1112 of W in the width direction.

Assembly relation based on shell 111 Yu end cap 112, shell 111 have height direction H corresponding with end cap 112 Outer end face 1114 is (referring to fig. 4 to Fig. 9).

Assembly relation based on shell 111 Yu end cap 112, shell 111 further includes opening 1115, such as Fig. 2, Fig. 3 and Fig. 7 It is shown.The quantity of opening 1115 is consistent with the quantity of end cap 112, and end cap 112 is set to opening 1115 and sealed opening 1115.Tool Body, as shown in Figures 2 and 3, end cap 112 is set as two, and opening 1115 is correspondingly set as two, and two end caps 112 are pacified respectively Two openings 1115 of the height direction H loaded on shell 111；As shown in fig. 7, end cap 112 is set as one, opening 1115 is correspondingly set It is one, end cap 112 is installed on the opening 1115 of the height direction H of shell 111.When opening 1115 is set as one, such as Fig. 7 institute Show, shell 111 further includes a link surface 1113.Link surface 1113 is located at one end of height direction H, link surface 1113 and two Big face 1111 is connected with one end of the height direction H of two facets 1112.In other words, shell 111 in height direction H one End opening and the opposite end of height direction H close.

The material of shell 111 can select suitable material according to actual needs.In one example, shell 111 can be whole For plastics.Alternatively, shell 111 includes the outer surface for being exposed to outer (being exposed to outside battery 1), the shell of each battery 1 111 part (i.e. containing the layer of outer surface) at least containing outer surface is plastics；Certainly, the inside of shell 111 can add other Any desired material is to meet required function.

As shown in Fig. 4, Fig. 5 and Fig. 8 and Fig. 9, each end cap 112 include two long faces, 1121, two short faces 1122 and Joint face 1123.Each end cap 112 further includes mounting hole 1124 (referring to fig. 2, Fig. 3 and Fig. 7).

As shown in Fig. 4, Fig. 5 and Fig. 8 and Fig. 9, two 1121 through-thickness T of long face are opposite each other.Each long face 1121 Including long face periphery P1121.Each long face periphery P1121 include height direction H long face height to outer rim E11211, long face height to Two long faces of inner edge E11212 and width direction W are wide to edge E11213.

The shape of each long face 1121 can be determined according to actual needs.In one example, each long face 1121 can be for along height The flat face of the entirety of direction H extension is spent, as shown in Fig. 4, Fig. 5, Fig. 8, Fig. 9, Figure 10 to Figure 16 and Figure 19.In another example In, as shown in Figure 17 and Figure 18, each long face 1121 forms jagged N1121.As shown in figure 17, notch N1121 can be by inclined-plane S3 It is formed；Alternatively, as shown in figure 18, notch N1121 can be formed by cascaded surface S4.The end cap 112 of each adjacent two battery 1 Opposite notch N1121 setting be shaped to aftermentioned second accommodating space R2.

W is opposite each other in the width direction for two short faces 1122.Each short face 1122 is respectively in the opposite of two long faces 1121 Two long faces are wide to being connected to two long faces 1121 at edge E11213.

Joint face 1123 is connect in the outside of height direction H with two long faces 1121 and two short faces 1122.

Mounting hole 1124 is arranged to install aftermentioned electrode terminal 12.

The quantity of end cap 112 is according to the aftermentioned electrode terminal 12 of each battery 1 and the tab 131 of electrode assembly 13 in height The layouts of the two sides of direction H determines.As shown in Figures 1 to 6, end cap 112 is set as one and is installed on the height side of shell 111 To the one end of H；As shown in Figure 7 to 9, end cap 112 is set as two and is respectively arranged in the two of the height direction H of shell 111 End.

The material of end cap 112 can select suitable material according to actual needs.In one example, end cap 112 can be whole For plastics.Alternatively, end cap 112 includes the outer surface for being exposed to outer (being exposed to outside battery 1), the end cap of each battery 1 112 part (i.e. containing the layer of outer surface) at least containing outer surface is plastics；Certainly, the inside of end cap 112 can add other Any desired material is to meet required function.

Since shell 11 includes shell 111 and end cap 112, so the quantity based on end cap 112 and end cap 112 are installed on The positional relationship of the end of the height direction H of shell 111 can define the first face F111, the edge of 11 through-thickness T of shell The second face F112 of width direction W, the third face F113 along height direction H, the first face periphery P111, the first face Gao Xiangyuan E1111 and the first face are wide to edge E1112.

In the example of Fig. 2 to Fig. 5, two end caps 112 are separately mounted to the two big face height of shell 111 to edge E11111 Place is simultaneously protruded outward in height direction H with respect to the outer end face 1114 of shell 111, and each first face F111 of shell 11 includes shell Each second face F112 of two long faces 1121 in the big face 1111 of one of 111 and two end caps 112, shell 11 includes shell 111 A facet 1112 and two end caps 112 two short faces 1122, each third face F113 of shell 11 includes the one of end cap 112 A joint face 1123, each first face height of shell 11 to edge E1111 include each end cap 112 long face height to outer rim E11211, outside Each first face of shell 11 it is wide to edge E1112 include each shell 111 one big face 1111 one big face it is wide to edge E11112 with And two long faces of two end caps 112 are wide to edge E11213, each first face periphery P111 of shell 11 is high including two the first faces To edge E1111 and two the first faces it is wide to edge E1112 (in other words, each first face periphery P111 of shell 11 include two The two big face of two long face height of end cap 112 to outer rim E11211, one big face 1111 are wide to hold to edge E11112 and two Two long faces of lid 112 are wide to edge E11213).In other words, in the example of Fig. 2 to Fig. 5, each first face of shell 11 F111, each second face F112, the first face the first face periphery P111 are wide related to shell 111 and end cap 112 to edge E1112.Two A third face F113, the first face height are only related to end cap 112 to edge E1111.

In the example of Fig. 7 to Fig. 9, end cap 112 is set as one, and the one big face that end cap 112 is mounted on shell 111 is high It is protruded outward to edge E11111 and in height direction H with respect to the outer end face 1114 of shell 111, each first face of shell 11 F111 includes a long face 1121 in one the big face 1111 and end cap 112 of shell 111, each second face F112 packet of shell 11 A facet 1112 of shell 111 and a short face 1122 of end cap 112 are included, two third face F113 of shell 11 include end Two the first face height of one joint face 1123 of lid 112 and the link surface 1113 of shell 111, shell 11 include to edge E1111 The long face height of end cap 112 to outer rim E11211 and one adjacent with link surface 1113 big face height to edge E11111, shell 11 Each first face it is wide to edge E1112 include each shell 111 one big face 1111 big face it is wide to edge E11112 and end cap 112 A long face it is wide to edge E11213, each first face periphery P111 of shell 11 include two the first face height to edge E1111 and Two the first faces it is wide to edge E1112 (in other words, each first face periphery P111 of shell 11 include end cap 112 long face height to Outer rim E11211, one big face 1111 two big face it is wide to edge E11112 and one adjacent with link surface 1113 big face height to Edge E11111).In other words, in the example of Fig. 7 to Fig. 9, each first face F111, each second face F112, two of shell 11 Third face F113, the first face periphery P111, two the first face height to edge E1111 and each first face it is wide to edge E1112 and shell Body 111 is related to end cap 112.

In the example of fig. 6, end cap 112 be set as two and height direction H with respect to shell 111 outer end face 1114 not to Outer protrusion, each first face F111 of shell 11 include the one big face 1111 of shell 111, each second face F112 packet of shell 11 A facet 1112 of shell 111 is included, each third face F113 of shell 11 includes a joint face 1123 of each end cap 112, outside Each first face height of shell 11 to edge E1111 include one big face 1111 one big face height to edge E11111, each the of shell 11 The wide big face for including one big face 1111 to edge E1112 is wide to edge E11112, each first face periphery P111 packet of shell 11 on one side It is wide to edge E1112 (in other words, each first face week of shell 11 to edge E1111 and two the first faces to include two the first face height Edge P111 includes that the two big face height in one big face 1111 is wide to edge E11112) to edge E11111 and two big face.It althoughs note that , in the example of fig. 6, each first face F111 of shell 11 does not include a long face 1121 of each end cap 112, shell 11 Each second face F112 do not include each end cap 112 a short face 1122, each first face height of shell 11 do not include to edge E1111 The long face height of each end cap 112 to outer rim E11211, each first face of shell 11 is wide to edge E1112 do not include each end cap 112 length Face it is wide to edge E11213, each first face periphery P111 of shell 11 do not include the long face height of each end cap 112 to outer rim E11211.It changes Sentence is talked about, in the example of fig. 6, in addition to each third face F113 of shell 11, the first face F111 of shell 11, the second face F112, First face periphery P111, the first face height it is wide only related to shell 111 to edge E1112 to edge E1111 and the first face and with each end Lid 112 is unrelated.In addition, the example in Fig. 6 is equally applicable to the case where end cap 112 are only arranged.

Explanation based on above-mentioned example, shell 11 include two the first face F111, two second face F112 and two the Three face F113.Two the first face F111 through-thickness T are opposite each other, and each first face F111 includes the first face periphery P111, the One face periphery P111 include two the first faces of two the first face height to the edge E1111 and width direction W of height direction H it is wide to Edge E1112.W is opposite each other in the width direction by two the second face F112, and each second face F112 is respectively two the first face F111's Two opposite the first faces are wide to being connected to two the first face F111 at edge E1112.Two third face F113 along height direction H that This is on the contrary, each third face F113 is connected to two the first face F111 and two the second face F112 in the side of height direction H, respectively Third face F113 is respectively in two opposite the first face height of two the first face F111 to being connected to two the first faces at edge E1111 F111。

The material of material and end cap 112 based on aforementioned shell 111 illustrates that correspondingly, shell 11 includes being exposed to outside (i.e. Be exposed to outside battery 1) outer surface, the shell 11 of each battery 1 at least part containing outer surface be plastics, certain shell 11 Inside can add other any desired materials to meet required function.Preferably, shell 11 can generally plastics.

Figure 10 is a perspective view of an embodiment of the two neighboring battery of the battery modules of Fig. 1.Figure 11 is the phase of Figure 10 The cutaway drawing of adjacent two batteries, wherein connection strap is not shown.Figure 12 is the cutaway of the two neighboring battery of Figure 11 Figure, wherein connection strap is shown.Figure 13 is the enlarged drawing of the encircled portion of Figure 12.Figure 14 is two neighboring battery corresponding with Figure 11 Another embodiment cutaway drawing, wherein connection strap is not shown.Figure 15 is that the another of two neighboring battery of Figure 10 splits Perspective view, wherein connection strap is shown and the range of groove is shown in broken lines.Figure 16 is the enlarged drawing of the encircled portion of Figure 15, wherein Connection strap is not shown.Figure 17 is the enlarged drawing of the another embodiment of two neighboring battery corresponding with Figure 15, wherein the model of notch It encloses and is shown in broken lines and connection strap is not shown.Figure 18 is the amplification of the another embodiment of two neighboring battery corresponding with Figure 15 Figure, wherein the range of notch is shown in broken lines and connection strap is not shown.Figure 19 is that two neighboring battery corresponding with Figure 15 is gone back The enlarged drawing of one embodiment, wherein connection strap is not shown.

2 and Figure 15 and combine Fig. 1 to Figure 11, Figure 13, Figure 14 and Figure 16 to Figure 19 referring to Fig.1, in battery modules, often First face F111 through-thickness T of the shell 11 of two neighboring battery 1 is relative to each other, the shell 11 of two neighboring battery 1 First face periphery P111 through-thickness T is relative to each other.Correspondingly, connection strap 2 along two neighboring battery 1 shell 11 it is opposite The first face periphery P111 setting, and the shell 11 of two neighboring battery 1 is fixed together by connection strap 2.Existing In technology, the big face 1111 for needing that bonded adhesives is made as often as possible to occupy shell 111, to guarantee bond area big as far as possible, this is just Cause using bonded adhesives amount it is very big.Compared to the middle position in the big face 1111 for being bonded in battery 1 using bonded adhesives Technical solution, in the present invention, opposite first face periphery P111 of the connection strap 2 along the shell 11 of two neighboring battery 1 It is arranged and the shell 11 of two neighboring battery 1 is fixed together by connection strap 2, to the usage amount of the material of connection strap 2 Substantially reduce and then improve production efficiency and energy density.In addition, in the prior art, in order to guarantee that battery 1 can pass through Bonding glue sticking will not move, and bonded adhesives also needs to carry out curing process, and the time that a large amount of structure adhesive curing needs is long, makes It is low at production efficiency；And in the present invention, even if connection strap 2 is related to solidification (or solidification) with being fixedly connected for shell 11, At least due to the reason of usage amount of material of connection strap 2 itself, it can also to solidify time that (or solidification) occupies greatly Shorten, so that production efficiency improves.

In order to make full use of the structure feature of shell 11 with improve the space utilization rate of battery modules and energy density and Connection strap 2 is to the fixing power of the shell 11 of two neighboring battery 1, and referring to Fig.1 0 to Figure 19, the first face week of two neighboring battery 1 Accommodating space R is formed at edge P111, connection strap 2 is set in accommodating space R.Accommodating space R helps to hide connection strap 2 To improve the space utilization rate and energy density of battery modules, while helping to increase the outer of connection strap 2 and two neighboring battery 1 The fixing area of shell 11 is to improve the fixing power of shell 11 to two neighboring battery 1.

The formation of accommodating space R has various ways.

In the example of Figure 19, it is provided between two the first face F111 of the shell 11 of two neighboring battery 1 in height The clearance G of direction H and width direction W perforation, it is empty that the clearance G forms receiving at two opposite the first face periphery E11112 Between R.Correspondingly, accommodating space R includes that aftermentioned to be formed in the first face wide to (i.e. big face wide to edge E11112 at) at edge E1112 First accommodating space R1 and the aftermentioned first face height that is formed in are to (being specifically for example formed in the end cap 112 of Fig. 9 at edge E1111 Long face height at outer rim E11211) the second accommodating space R2.The setting of clearance G is also electricity other than forming accommodating space R Expansion of the pond 1 during charge and discharge cycles provides cushion space, and provides heat-dissipating space for each battery 1, improves battery The radiating efficiency of mould group.In addition, the cushion between two the first face F111 of adjacent shells 11 in the prior art is omitted Setting, reduce the total quality of battery modules.In an example, connection strap 2 is by the shell of two neighboring battery 1 in order to prevent Before 11 are fixed together, connection strap 2 causes the wave of material from the first face F111 for falling into shell 11 in clearance G Take, it is preferable that clearance G is not more than 1.2mm, but is not limited to this, can determine according to actual needs.Further, exist In the state that the shell 11 of two neighboring battery 1 is fixed together by connection strap 2, connection strap 2 can also along from big face it is wide to (for example, using hot-melt adhesive paste based on subsequent in the inside that direction inside edge E11112 to big face 1111 extends to clearance G The inside of mode, the clearance G that connection strap 2 extends after heating by flowing moves a certain distance, and cools and solidifies later).But it infuses Meaning ground is that connection strap 2 extends to the size in the inside of clearance G will in right amount, to guarantee to connect two neighboring big face 1111 always (avoid the occurrence of connection strap 2 extend to the part in the inside of clearance G only connect one in two neighboring big face 1111).

In the example of Figure 10 to Figure 14, the big wide Xiang Yuan in face of opposite two of the shell 111 of two neighboring battery 1 (i.e. the first face wide to edge E1112 at) forms the first accommodating space R1 at E11112, and accommodating space R includes the first accommodating space Connection strap 2 is provided in R1, the first accommodating space R1.Specifically, opposite two of the shell 111 of two neighboring battery 1 are small Face 1112 is flared out from the opposite big face of the shell 111 of two neighboring battery 1 is wide to edge E11112 respectively, with big at two Face is wide to being outwardly formed the first accommodating space R1 at edge E11112.More specifically, as shown in Figure 10 to Figure 13, two neighboring battery Opposite two facet 1112 of 1 shell 111 is respectively from the opposite wide Xiang Yuan in big face of the shell 111 of two neighboring battery 1 E11112 is flared out with cambered surface S2, or as shown in Figure 14, opposite two facet of the shell 111 of two neighboring battery 1 1112 are flared out respectively from the opposite big face of the shell 111 of two neighboring battery 1 is wide to edge E11112 with tapered plane S1.For Further increase the space utilization rate and energy density of battery modules, it is preferable that as shown in figure 12, connection strap 2 is along width side To the vertex V1112 of the not prominent facet 1112 of W.In addition, before being equipped with or can be not provided in the example of Figure 10 to Figure 14 The clearance G stated.

In the example of Figure 15 to Figure 18, shape between opposite two long face 1121 of the end cap 112 of two neighboring battery 1 At the second accommodating space R2, accommodating space R includes that the second accommodating space R2, the second accommodating space R2 contains connection strap 2.Scheming In 17 and Figure 18, two opposite long faces 1121 are respectively formed notch N1121, and opposite notch N1121 forms the second accommodating space R2.As shown in figure 17, each long face 1121 for forming notch N1121 includes inclined-plane S3, and inclined-plane S3 forms notch N1121.Such as Figure 18 Shown, each long face 1121 for forming notch N1121 includes cascaded surface S4, and cascaded surface S4 forms notch N1121.In Figure 15 and Figure 16 In, the 1111 through-thickness T of big face of the shell 111 of 1121 relative thickness direction the same side T of each long face of each end cap 112 to Bias internal, so as to groove G1 is formed between each long face 1121 and the outer end face 1114 of the height direction H of shell 111, it is two neighboring Groove G1 between end cap 112 forms the second accommodating space R2.In addition, in the example of Figure 15 to Figure 18, can be equipped with or can To be not provided with clearance G above-mentioned.

Electrode terminal 12 is set to the end cap 112 of shell 11.Electrode terminal 12 is for the busbar with battery modules (busbar) it connects, to realize the electrical connection of multiple batteries 1.Layout of the electrode terminal 12 in the two sides of height direction H can be according to The layout of two sides according to the tab 131 of aftermentioned electrode assembly 13 in height direction H determines.Based on electrode terminal 12 in end cap 112 setting, it is preferable that connection strap 2 is used along height direction H not projection electrode terminal 12 with improving the space of battery modules Rate and energy density.

Electrode assembly 13 is equipped with tab 131, and electrode assembly 13 is contained in the shell 111 of shell 11.Electrode assembly 13 wraps Opposite polarity pole piece (not shown) and isolation film (not shown) are included, pole piece includes the work of collector and setting on a current collector Property material layer.Electrode assembly 13 can be formed using winding method or lamination process.The quantity of the electrode assembly 14 of each battery 1 is not It is restricted, is not limited to one shown in figure, it can be for more than one.Tab 131 can individually be welded in corresponding pole piece or Person is integrally formed with corresponding pole piece.Tab 131 can be arranged in height direction H two sides (as shown in Figure 3 and Figure 4) or It is arranged in the same side (such as Fig. 7) of height direction H.

Switching piece 14 is contained in shell 111 and electrode electrically connected terminal 12 and tab 131.In other words, electrode terminal 12 and tab 131 be not direct electrical connection but electrical connection indirectly.

The material of connection strap 2 can select suitable material, as long as can reach required bonding strength.Connection strap 2 can be the material that can be soldered, or the material (situation i.e. without welding) for that can be combined as a whole with shell 11.For Convenient for setting connection strap 2, connection strap 2 is plastics.In the prior art, it in battery modules assembling process, generallys use viscous Glue sticking is connect in the middle position in the big face 1111 of shell 111.In comparison, the connector 2 of plastics is more light-weight than bonded adhesives, mentions High energy density.In addition, when shell 111 is plastics especially polypropylene (PP), the adhesive property of the shell 111 of plastics Difference, battery modules assembling in be difficult with structure glue come the shell 111 for the plastics that are adhesively fixed securely.When connector 2 be plastics, When shell 111 is plastics, end cap 112 is plastics, adjacent shells 11 can be firmly attached, bonding strength is high.Connection strap 2 can be through Adjacent shells 11 are fixed together by hot melt, operating procedure (hot-melt adhesive paste technique) simply, and with the prior art Longer bonded adhesives curing time is compared, and cooling time is short after connection strap 2 heats, and which thereby enhances the production effect of battery modules Rate.In addition, the middle position in the big face 1111 of shell 111 is arranged in bonded adhesives, guarantee to be bonded after compressing by adjacent housings 111 Area is to improve adhesive strength, and the flatness in such as big face 1111 is poor, then bonded adhesives not good may be contacted with shell, bonding Area is small, adhesive strength low subsequent the problems such as will cause degumming, and battery 1 can generate heat in charge and discharge process, and bonded adhesives can be sent out Raw aging, causes adhesive strength low.The material of connection strap 2 is plastics, is set to the periphery of shell 11, wants to the flatness of shell It asks and substantially reduces, and be not susceptible to aging, there is good bonding strength.

Detailed description describes multiple exemplary embodiments above, but is not intended to be limited to clearly disclosed combination herein. Therefore, unless otherwise indicated, various features disclosed herein can be combined and be formed and not shown for clarity and Multiple other combinations out.

Claims (12)

1. a kind of battery modules, comprising:

Multiple batteries (1), multiple battery (1) through-thickness (T) are arranged side by side, and each battery (1) includes shell (11), shell It (11) include two the first faces (F111), described two first face (F111) through-thickness (T) are opposite each other, each first face It (F111) include the first face periphery (P111)；

Wherein, the first face (F111) through-thickness (T) of the shell (11) of each adjacent two battery (1) is opposite to each other, adjacent First face periphery (P111) through-thickness (T) of the shell (11) of two batteries (1) is relative to each other；

It is characterized in that,

Battery modules further include connection strap (2), opposite first of the connection strap (2) along the shell (11) of two neighboring battery (1) Face periphery (P111) setting, and the shell (11) of two neighboring battery (1) is fixed together by connection strap (2)；

Shell (11) includes shell (111) and end cap (112)；

Shell (111) includes the opening (1115) of short transverse (H), and shell (111) has short transverse at opening (1115) (H) outer end face (1114)；

End cap (112) is included in the joint face (1123) in the outside of short transverse (H)；

End cap (112) is overlapped on the outer end face (1114) of shell (111) or end cap (112) is located at the opening of shell (111) (1115) in and end cap (112) joint face (1123) short transverse (H) with respect to shell (111) outer end face (1114) not to Outer protrusion.

2. battery modules according to claim 1, which is characterized in that at the first face periphery (P111) of two neighboring battery It is formed with accommodating space (R), connection strap (2) is set in accommodating space (R).

3. battery modules according to claim 2, which is characterized in that

It is provided between two the first faces (F111) of the shell (11) of two neighboring battery (1) in short transverse (H) and width The gap (G) of direction (W) perforation, the gap (G) form accommodating space at two opposite the first face peripheries (E11112) (R)。

4. battery modules according to claim 1, which is characterized in that

Shell (111) includes: two big face (1111), and through-thickness (T) is opposite each other, and major face (1111) includes width side To two wide Xiang Yuan in big face (E11112) of (W)；

Each first face periphery (P111) of shell (11) includes the wide Xiang Yuan in face two big of the one big face (1111) of shell (111) (E11112)；

It is empty that the first receiving is formed at the big wide Xiang Yuan in face (E11112) of opposite two of the shell (111) of two neighboring battery (1) Between (R1), accommodating space (R) includes the first accommodating space (R1), is provided with connection strap (2) in the first accommodating space (R1).

5. battery modules according to claim 4, which is characterized in that

Shell (111) further include: two facets (1112), (W) is opposite each other in the width direction, and each facet (1112) is respectively two Two big face (1111) is connected at two opposite wide Xiang Yuan in big face (E11112) of a big face (1111)；

Opposite two facet (1112) of the shell (111) of two neighboring battery (1) is respectively from the shell of two neighboring battery (1) The opposite big face wide Xiang Yuan (E11112) of body (111) is flared out, at two wide Xiang Yuan in big face (E11112) to shape At the first accommodating space (R1).

6. battery modules according to claim 5, which is characterized in that

Opposite two facet (1112) of the shell (111) of two neighboring battery (1) is respectively from the shell of two neighboring battery (1) The opposite wide Xiang Yuan in big face (E11112) of body (111) is flared out with cambered surface (S2).

7. battery modules according to claim 1, which is characterized in that

End cap (112) includes reciprocal two long faces (1121) of through-thickness (T), and each long face (1121) includes height side To the long face height of (H) to outer rim (E11211)；

Each first face periphery (P111) of shell (11) includes the long face height of end cap (112) to outer rim (E11211)；

The second accommodating space (R2) is formed between opposite two long face (1121) of the end cap (112) of two neighboring battery (1), Accommodating space (R) includes the second accommodating space (R2), and the second accommodating space (R2) contains connection strap (2).

8. battery modules according to claim 7, which is characterized in that

Two opposite long faces (1121) are respectively formed notch (N1121), and it is empty that opposite notch (N1121) forms the second receiving Between (R2).

9. battery modules according to claim 7, which is characterized in that

The big face (1111) of the shell (111) of the same side each long face (1121) relative thickness direction (T) of each end cap (112) is along thickness Degree direction (T) is offset inward, so that between each long face (1121) and the outer end face (1114) of the short transverse (H) of shell (111) It is formed groove (G1), the groove (G1) between two neighboring end cap (112) forms the second accommodating space (R2).

10. battery modules according to claim 4, which is characterized in that

Shell (111) further include: two facets (1112), (W) is opposite each other in the width direction, and each facet (1112) is respectively two Two big face (1111) is connected at two opposite wide Xiang Yuan in big face (E11112) of a big face (1111)；

The vertex (V1112) of connection strap (2) (W) not prominent facet (1112) in the width direction.

11. battery modules according to claim 1, which is characterized in that

End cap (112) is equipped with electrode terminal (12), and connection strap (2) is along short transverse (H) not projection electrode terminal (12).

12. battery modules according to claim 1, which is characterized in that the shell (11) of each battery (1) includes outside being exposed to Outer surface, shell (11) at least part containing outer surface of each battery (1) is plastics, and connection strap (2) is plastics.