CN208570676U - Battery modules - Google Patents

Abstract

The utility model relates to a kind of battery modules, wherein battery modules include multiple battery units (1), and each pole (13) battery unit (1) includes the first shell (11) of insulation；Second shell (2), each pole (13) battery unit (1) arrange along the length direction of battery modules and are located in pole (13) second shell (2)；With insulating layer (14), it is located between at least partly pole of pole (13) battery unit (1) and the inner sidewall of pole (13) second shell (2), and partially covers pole (13) first shell (11) in the short transverse of pole (13) battery unit (1).Such battery modules will be separated between pole and second shell using insulating trip, equivalent to increase the insulation distance between pole and second shell, can be improved the insulation performance of battery modules.

Description

Battery modules

Technical field

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

Background technique

In recent years, battery modules, which are widely used in, provides power, such as electric vehicle etc. for high-power device.Electricity Chi Mo group is by by multiple battery cells in series or being connected in parallel to realize biggish capacity or power.

Current battery modules have multiple battery units, and battery unit is made using isolation materials such as plastics or composite materials For the case material of battery unit, while battery modules are sealed multiple battery units using metal shell.But in reality Border is in use, there are gaseous electrolyte inside the metal shell of battery modules, when gaseous electrolysis liquid condensing forms liquid Electrolyte after may will between the pole of battery unit and the metal shell of battery modules realize conducting, so as to cause battery Mould group short circuit.

In order to improve the insulation performance of this battery modules, current way is usually the pole and electricity for increasing battery unit The distance between the metal shell of Chi Mo group, but find still to be difficult to reach preferably insulation performance in actual use.

Utility model content

The embodiments of the present invention provide a kind of battery modules, can be improved the insulation performance inside battery modules.

To achieve the above object, the embodiments of the present invention provide a kind of battery modules, comprising:

Multiple battery units, each battery unit include the first shell of insulation；

Second shell, each battery unit are arranged along the length direction of battery modules and are located in second shell；With

Insulating layer is at least partially disposed between the pole of battery unit and the inner sidewall of second shell, and in battery unit Short transverse on partially cover first shell.

Further, battery unit further include:

First cover board, be connected to first shell and close first shell top opening, pole be set to the first cover board and It is exposed to the side of the separate first shell of the first cover board；

Wherein, the upper surface of insulating layer is not less than the upper surface of pole.

Further, battery unit is fixed in one end of insulating layer, and the circumferential direction of each battery unit is around equipped with insulation Layer, makes to be equipped with insulating layer between each battery unit and second shell and between adjacent cell.

Further, each battery unit is disposed adjacent to form whole stack battery, and insulating layer is around stack battery Entire periphery setting, so that insulating layer is only located between each side wall of stack battery and second shell.

Further, battery unit further includes the first cover board, and the first cover board is connected to first shell and closing first shell Top opening；

Insulating layer is fixed on the lateral wall of the first shell of each battery unit, the outer wall of the first cover board or second shell On inner sidewall.

Further, first shell, insulating layer and second shell are successively bonded setting.

Further, insulating layer uses soft insulating material.

Further, the top of insulating layer is equipped with bending edge, and the direction that bending edge is directed away from second shell inner wall extends.

Further, the face that insulating layer is bonded with cell outer walls or second shell inner wall uses and is adhesively fixed；Or Insulating layer is in banded structure, and insulating layer fixes two free ends after being wound in the periphery of battery unit.

Further, the first cover board highly gradually decreases or staged from the inside to the outside adjacent to the outer surface of first shell part It reduces.

Based on the above-mentioned technical proposal, the battery modules of the utility model one embodiment, internal each battery unit have The first shell of insulation is equipped with insulating layer between the pole of at least partly battery unit and the inner sidewall of second shell, and absolutely Edge layer partially covers first shell in the short transverse of battery unit.Such battery modules will adopt between pole and second shell It is separated with insulating layer, equivalent to increase the insulation distance between pole and second shell, can be improved the insulation of battery modules Performance.

Detailed description of the invention

Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application, The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model It limits.In the accompanying drawings:

Fig. 1 is the decomposition diagram of one embodiment of the utility model battery modules；

Fig. 2 is the appearance schematic diagram of one embodiment in the utility model battery modules；

Fig. 3 is the structural schematic diagram of one embodiment of battery unit in the utility model battery modules；

Fig. 4 is cross-sectional view of the battery modules shown in Fig. 2 along the direction A-A；

Fig. 5 be 4 in K at enlarged drawing；

Fig. 6 is the structural schematic diagram of another embodiment of the utility model battery modules.

Description of symbols

1, battery unit；11, first shell；12, the first cover board；13, pole；14, insulating layer；141, bending edge；15, collect Flowing plate；16, tab；17, blow vent；2, second shell；21, mounting post；22, weight loss groove；3, the second cover board.

Specific embodiment

The utility model described further below.In the following paragraphs, the different aspect of embodiment is defined in more detail. The various aspects so limited can be combined with any other one aspect or many aspects, can not be combined unless explicitly stated otherwise.Especially It is, it is considered to be preferred or advantageous any feature can be considered as preferred or advantageous spy with other one or more Sign combination.

The terms descriptions merely for convenience such as " first " that occurs in the utility model, " second ", with distinguish have it is identical The different building blocks of title are not offered as successive or primary-slave relation.

In addition, when element is referred to as " " another element "upper", the element can directly on another element, or Person can be indirectly on another element and between them inserted with one or more intermediary elements.In addition, working as When element is referred to as " being connected to " another element, which can be directly connected to another element, or can be indirectly It is connected to another element and between them inserted with one or more intermediary elements.Hereinafter, same attached Icon note indicates same element.

In order to which each orientation is explicitly described in the examples below, each side of coordinate system in Fig. 2 to battery modules To being defined, the direction x indicates the length direction of battery modules；The direction y is vertical with the direction x in the horizontal plane, indicates battery The width direction of mould group；The plane that the direction z is formed perpendicular to the direction x and y indicates the short transverse of battery modules.Based on such Bearing definition, using the orientation or positional relationship of the instructions such as "upper", "lower", "top", "bottom", "front", "rear", "inner" and "outside" Description, this is merely for convenience of description the utility model, rather than the device of indication or suggestion meaning must have specifically Orientation is constructed and operated in a specific orientation, therefore should not be understood as the limitation to scope of protection of the utility model.

Inventors have found that current battery mould group is by increasing between the pole of battery unit and the metal shell of battery modules Distance, be still difficult to reach preferably insulation performance, main reason is that, although the shell made of plastics or composite material The electrolyte of liquid can be sealed, but since plastics or composite material itself material are limited, during long-time service, still Gaseous electrolyte can not be prevented to ooze out to outside shell, therefore there are gaseous electrolysis inside the metal shell of battery modules Liquid.When battery modules under high and low temperature alternative environment in use, gaseous electrolysis liquid, which is easy condensation, forms the electrolyte of liquid, although The increase of the distance between pole and battery modules metal shell can reduce the risk be connected by electrolyte, but send out in electrolyte During raw flowing, it is possible to pole and the metal shell of battery modules is connected, to generate Insulation Problems.It is asked with this Based on the discovery of topic, the utility model proposes a kind of improved battery modules.

Fig. 1 illustrates the decomposition diagram of one embodiment of the utility model battery modules.In this embodiment, electric Chi Mo group may include second shell 2 and multiple battery units 1, each battery unit 1 along battery modules length direction arrangement and It is located in second shell 2, the wide surface of adjacent cell 1 is facing with each other, can contact setting or interval pre-determined distance setting, respectively A battery unit 1 can connect and/or be arranged in parallel according to demand.It is equipped with the second cover board 3 in the top open part of second shell 2, Second cover board 3 closes the top opening of second shell 2.Metal material can be used in second shell 2 and the second cover board 3.

Fig. 2 illustrates the appearance schematic diagram of battery modules.After the assembly is completed, second shell 2 and the second cover board 3 are formed The module shell of sealing.Second shell 2 along its length end plate two corner positions be equipped with mounting post 21, fastening can be passed through Part is along the hole that short transverse is threaded through mounting post 21 battery modules to be fixed on equipment matrix.It is difficult in order to reduce installation Degree, mounting post 21 can only cover the Partial Height of second shell 2.It, can be in second shell in order to mitigate the weight of second shell 2 2 weight loss groove 22 is arranged on end plate along its length.

Fig. 3 is the structural schematic diagram of battery unit in battery modules.Each battery unit 1 includes the first shell of insulation 11 and first cover board 12, the first cover board 12 be connected to first shell 11 and close the top opening of first shell 11.First shell 11 and first cover board 12 insulating materials can be used.

Electrode assembly and electrolyte are equipped in first shell 11, electrode assembly and electrolyte can be in electrochemical reactions Generate energy.With reference to Fig. 4, electrode assembly is along the both ends of 1 length direction of battery unit (width direction corresponding to battery modules) It is respectively equipped with tab 16, the corresponding tab 16 of positive and negative anodes passes through the connection conducting of collector plate 15 respectively.The top of collector plate 15 is equipped with Bending part, pole 13 are located at position corresponding with bending part on the first cover board 12, while be exposed to the first cover board 12 far from the The side of one shell 11.Two poles 13 are even connected with the positive and negative anodes of electrode assembly respectively as a result,.Further, in the first lid Also settable blow vent 17 on plate 12, blow vent 17 be used for by the gas inside battery unit 1 it is externally discharged, play safe work With.

Still referring to FIG. 3, in this embodiment, the circumferential direction of each battery unit 1 around insulating layer 14 is equipped with, makes each electricity Insulating layer 14 is equipped between pool unit 1 and second shell 2 and between adjacent cell 1.The bottom level of insulating layer 14 Section is sticked on 11 outer wall of first shell of battery unit 1, and top is higher than the first cover board 12, so that 1 cloth of each battery unit When setting in second shell 2, insulating layer 14 is located between the pole of battery unit 1 and the inner sidewall of second shell 2.In short, will It is practical new at this that insulating layer 14 is located at the structure between at least partly pole of battery unit 1 and the inner sidewall of second shell 2 Within the protection scope of type.

The phenomenon that may having electrolyte to exosmosis using plastics or composite material due to first shell 11, first Can have gaseous electrolysis liquid between shell 11 and second shell 2, and in battery modules in high and low temperature alternative environment in use, Gaseous electrolysis liquid can be condensed into the electrolyte of liquid.The embodiment will between pole 13 and second shell 2 using insulating layer 14 every It opens, equivalent to increase the insulation distance between pole 13 and second shell 2, is reliably prevented from pole 13 and second shell It is conductive by gaseous electrolysis liquid or condensed electrolyte between 2, to improve the insulation performance of battery modules.

Moreover, the circumferential direction in each battery unit 1 is surround equipped with insulating layer 14, moreover it is possible to make between adjacent cell 1 It is isolated also by insulating layer 14, prevents from being connected between the pole 13 of adjacent cell 1 by electrolyte, remittance can only be passed through It flows item and realizes conducting, can further improve the insulation performance in battery modules between each battery unit 1.

From figure 3, it can be seen that insulating layer 14 covers first shell 11 on the Partial Height direction of battery unit 1, first The region that shell 11 is located at 14 lower part of insulating layer is in non-package status.Due to first shell 11 use insulating materials, second Shell 2 uses metal material, may be implemented to insulate between the two, therefore the embodiment is without making the integrally package first of insulating layer 14 Shell 11.Such set-up mode can reduce the thermal resistance of battery modules, increase thermally conductive pathways, can enhance battery modules worked Heat dissipation effect in journey reduces the requirement to cooling system.

Optionally, the banded structure with one fixed width can be used in insulating layer 14, which can be wrapped in advance The outside of battery unit 1, end are fixed, then in groups by each battery unit 1.Or insulating layer 14 can also be set as having Have the cyclic structure of one fixed width, insulating layer 14 be directly set in the outside of battery unit 1, then by each battery unit 1 at Group.

Optionally, insulating layer 14 uses soft insulating material.Soft insulating material is easy to be wrapped in the outer of battery unit 1 Portion, without be processed into advance with the matched shape of battery unit 1, the manufacture difficulty of battery modules can be reduced.Moreover, soft insulating Relatively thin thickness may be selected in material, will not reduce the energy density of battery modules.

Fig. 4 is cross-sectional view of the battery modules shown in Fig. 2 along the direction A-A.Between first shell 11 and the first cover board 12, with And it can realize that sealing is fixed by laser welding between second shell 2 and the second cover board 3.The top of pole 13 and the second cover board 3 Between there are pre-determined distances.Battery unit 1 is located in pole 13 and second shell 2 in the two sides along battery modules width direction Insulating layer 14 is equipped between wall.

In order to more clearly illustrate the setting position of insulating layer 14, enlarged drawing at K as shown in Figure 5.Will in groups after Battery unit 1 be installed in second shell 2 after, first shell 11, insulating layer 14 and second shell 2 are successively bonded setting. In the case where guaranteeing that battery unit 1 is easily put into second shell 2, the mode for being bonded setting can make the fixation of insulating layer 14 more firm Gu being fallen off after preventing the fixed positions such as the bonding of insulating layer 14 from being corroded, it is ensured that battery modules are used for a long time exhausted Edge.

The upper surface of insulating layer 14 is not less than the upper surface of pole 13, can more preferably be higher than pole 13.The structure can be obvious Ground increases the insulation distance between pole 13 and second shell 2, reliably pole 13 is isolated with second shell 2, to improve The insulation performance of battery modules.Alternatively, the upper surface of insulating layer 14 can also be only above the upper surface of the first cover board 12, still Lower than the upper surface of pole 13, can also play the role of optimizing insulation effect.Insulating layer 14 covers 11 top side wall of first shell As long as height be able to satisfy and be tightly fastened insulating layer 14, reducing insulating layer 14, area coverage can guarantee in the height direction The heat dissipation effect of battery unit 1.

First cover board 12 highly gradually decreases from the inside to the outside adjacent to the outer surface of 11 part of first shell or staged drop It is low, conducive to the electrolyte of liquid is flowed down along the outer surface of the first cover board 12, thus far from pole 13.Electrolyte flow extremely When first cover board 12 is close to the region of 11 side wall of first shell, although electrolyte may be gathered, due to by insulating layer 14 buffer action can prevent electrolyte that pole 13 and second shell 2 are connected.

In a concrete implementation structure, battery modules can be lithium battery, and second shell 2 and the second cover board 3 pass through Laser welding forms sealing structure.3 line aluminium alloys may be selected in second cover board 3, such as with a thickness of 1.5mm.Second shell 2 may be selected 5 line aluminium alloys, such as with a thickness of 1.2mm.As shown in Figure 1,5 battery units 1 are equipped in single battery mould group, by concatenated Mode connects, and 11 lateral wall of first shell of each battery unit 1 is coated with insulating layer 14, insulating layer close to the region at top 14 can be used laminated structure, and material can be the high insulating materials of blue film or plastics etc..Such as insulating layer 14 with a thickness of 0.1mm, Width is 10mm, and the upper surface of insulating layer 14 can be higher by the first cover board 6mm.Optionally, battery unit 1 covers first shell 11 The proportional region that height accounts for entire 11 height of first shell can be

1/15~1/2, to obtain preferable heat dissipation performance, but not limited to this.The first shell 11 of battery unit 1 and first High molecular material, wall thickness 0.5mm can be used in cover board 12.The material of pole 13 is aluminium alloy.Battery modules insulate afterwards in groups Layer 14 is directly contacted with second shell 2, therefore from the insulation distance between 2 inner wall of pole 13 and second shell due to insulating layer 14 Presence and it is elongated, to improve the insulation performance of battery modules.

In another embodiment, with embodiment illustrated in fig. 3 the difference is that, insulating layer 14 is not about single battery The circumferential setting of unit 1, but each battery unit 1 is disposed adjacent to form whole stack battery, insulating layer 14 is around in groups The entire periphery of battery is arranged, so that insulating layer 14 is only located at stack battery along each of battery modules length direction and width direction Between side wall and second shell 2, i.e., insulating layer 14 is set again later in groups in battery unit 1.The embodiment can guarantee electricity On the basis of Chi Mo group insulation performance, the setting difficulty of insulating layer 14 is further decreased, processing efficiency can be improved, and can also save Material saving, to reduce the production cost of battery modules.

There are three types of implementations for the embodiment, will provide respectively below:

First, insulating layer 14 is fixed on the lateral wall of the first shell 11 of each battery unit 1, for example, each Battery unit 1 in groups after, using the whole top area for surrounding 1 lateral wall of stack battery unit of band-like insulating layer 14, It is whole again to be put into second shell 2.Such mode can be realized being reliably fixed for insulating layer 14 and battery unit 1, be easy to by The battery unit 1 of group is fitted into second shell 2, and insulating layer 14 is less likely to occur to fall off in loading procedure.

Second, insulating layer 14 is fixed on the inner sidewall of second shell 2.Each battery unit 1 in groups after, directly It is packed into second shell 2.Such mode can make battery unit 1 in groups with the process of fixed insulating layer 14 while carrying out, can Assembly efficiency is improved, to improve the production efficiency of battery modules.

Third, insulating layer 14 is fixed on the outer wall of the first cover board 12, insulating layer 14 may be designed as the L-shaped knot in section Structure, for the transverse part of L-shaped structure for fixing insulating layer 14, vertical part separates pole 13 and the inner wall of second shell 2.For battery list The battery modules that the side wall of member 1 is contacted with 2 inner wall of second shell, such mode is without changing original first shell 11 and second shell The fit tolerance of body 2 directly can add insulating layer 14 at the top of the first cover board 12.Equally, such fixed form is also applied for often The circumferential direction of a battery unit 1 is around the embodiment of setting insulating layer 14.

In some embodiments, insulating layer 14 is in the cyclic structure with preset width, and insulating layer 14 uses fixing mode Installation, keeps the setting of insulating layer 14 more quick.Or insulating layer 14 is in bar-shape structure, can be wrapped in each battery unit Perhaps the periphery of stack battery or fitting are located on the inner wall of second shell 2 for 1 periphery, and such mode is without considering insulating layer 14 with the cooperation of 2 inner wall of battery unit 1, stack battery or second shell requirement, it is adaptable, improve the fixed patch of insulating layer 14 Right and fastness.

Further, different fixed forms, insulating layer 14 and 1 outer wall of battery unit or second shell can be used in insulating layer 14 Fixed reliability can be improved using being adhesively fixed in the face of 2 inner wall of body fitting.Or insulating layer 14 is in bar-shape structure, absolutely Edge layer 14 is wrapped in two free ends after the periphery of battery unit 1 to be bonded or other means fixed, including insulating layer 14 It is wrapped in the periphery of single battery unit 1 and stack battery.Such mode can make the fixation of insulating layer faster, improve battery mould The production efficiency of group.

Fig. 6 illustrates the structural schematic diagram of another embodiment of the utility model battery modules, the difference with Fig. 5 It is, the top of insulating layer 14 is equipped with bending edge 141, and the direction that bending edge 141 is directed away from 2 inner wall of second shell extends.It is curved Flanging 141 can be vertical with the main part of insulating layer 14 or be arranged in other angles.The embodiment can increase pole 13 and Creepage distance in two shells, 2 inside wall bracket, creepage distance are the pole 13 measured along the insulating surface of insulating layer 14 and Shortest path between two shells 2, to optimize insulation effect.

A kind of battery modules provided by the utility model are described in detail above.It is used herein specifically Embodiment is expounded the principles of the present invention and embodiment, and the above embodiments are only used to help understand The method and its core concept of the utility model.It should be pointed out that for those skilled in the art, not taking off Under the premise of from the utility model principle, several improvements and modifications can be made to this utility model, these improvement and modification It also falls into the protection scope of the utility model claims.

Claims (10)

1. a kind of battery modules characterized by comprising

Multiple battery units (1), each battery unit (1) include the first shell (11) of insulation；

Second shell (2), each battery unit (1) arrange along the length direction of battery modules and are located at the second shell (2) in；With

Insulating layer (14) is at least partially disposed at the pole (13) of the battery unit (1) and the inner sidewall of the second shell (2) Between, and the first shell (11) are partially covered in the short transverse of the battery unit (1).

2. battery modules according to claim 1, which is characterized in that the battery unit (1) further include:

First cover board (12) is connected to the top opening of the first shell (11) and the closing first shell (11), described Pole (13) is set to first cover board (12) and is exposed to separate the first shell (11) of first cover board (12) Side；

Wherein, the upper surface of the insulating layer (14) is not less than the upper surface of the pole (13).

3. battery modules according to claim 1, which is characterized in that the electricity is fixed in one end of the insulating layer (14) Pool unit (1), the circumferential direction of each battery unit (1) is around the insulating layer (14) are equipped with, so that each battery It is all had the insulating layer (14) between unit (1) and second shell (2) and between the adjacent battery unit (1).

4. battery modules according to claim 1, which is characterized in that each battery unit (1) is disposed adjacent to be formed Whole stack battery, the insulating layer (14) is arranged around the entire periphery of the stack battery, so that the insulating layer (14) it is only located between each side wall of stack battery and second shell (2).

5. battery modules according to claim 4, which is characterized in that the battery unit (1) further includes the first cover board (12), first cover board (12) is connected to the top opening of the first shell (11) and the closing first shell (11)；

The insulating layer (14) is fixed on lateral wall, the first cover board of the first shell (11) of each battery unit (1) (12) on the inner sidewall of outer wall or the second shell (2).

6. battery modules according to claim 1, which is characterized in that the first shell (11), insulating layer (14) and Two shells (2) are successively bonded setting.

7. battery modules according to claim 1, which is characterized in that the insulating layer (14) uses soft insulating material.

8. battery modules according to claim 1, which is characterized in that the top of the insulating layer (14) is equipped with bending edge (141), the direction that the bending edge (141) is directed away from the second shell (2) inner wall extends.

9. battery modules according to claim 1, which is characterized in that the insulating layer (14) and the battery unit (1) The face of outer wall or the fitting of second shell (2) inner wall, which uses, to be adhesively fixed；Or the insulating layer (14) is in banded structure, it is described exhausted Edge layer (14) fixes two free ends after being wound in the periphery of the battery unit (1).

10. battery modules according to claim 2, which is characterized in that the neighbouring first shell of first cover board (12) The outer surface of body (11) part highly gradually decreases from the inside to the outside or staged reduces.