CN220042101U

CN220042101U - Battery pack

Info

Publication number: CN220042101U
Application number: CN202321376629.7U
Authority: CN
Inventors: 黄伟才; 杨绍
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-11-17
Anticipated expiration: 2033-05-31

Abstract

The present utility model provides a battery pack comprising: the battery module comprises a plurality of coamings which are detachably connected and a plurality of battery modules which are arranged in the coamings; the battery module comprises a battery bracket for accommodating the battery cell; the battery supports of the adjacent battery modules are connected in a sealing way; an accommodating cavity is formed between the coaming and the battery module, and an adhesive material is filled in the accommodating cavity. According to the utility model, the plurality of battery modules are glued and solidified outside the box body to form the battery module with an integrated structure, and then the battery module is carried into the box body to complete the assembly of the battery pack. So set up, be favorable to reducing the encapsulating degree of difficulty on the one hand, improve the whole assembly efficiency of battery package, reduce the battery package assembly duration, on the other hand promotes battery module's stability, and the transportation of being convenient for increases the whole package intensity of battery package simultaneously to guarantee the quality of battery package product.

Description

Battery pack

Technical Field

The utility model relates to the technical field of battery production and manufacturing, in particular to a battery pack.

Background

In order to improve the structural strength of the battery pack, the conventional cylindrical power battery system or battery pack is generally filled with glue solution in a box body assembled with the battery cells, so that the battery cells and the box body are solidified into a whole. In the conventional step, each component such as the battery cell is assembled to the box body and then glue is filled, so that the operation efficiency is easily affected due to interference of the box body structure in the glue filling process, and the glue filling difficulty is improved.

Disclosure of Invention

In order to overcome at least one of the drawbacks of the prior art described above, the present utility model provides a battery pack comprising: the battery module comprises a plurality of coamings which are detachably connected and a plurality of battery modules which are arranged in the coamings; the battery module comprises a battery bracket for accommodating the battery cell; the battery supports of the adjacent battery modules are connected in a sealing way; an accommodating cavity is formed between the coaming and the battery module, and an adhesive material is filled in the accommodating cavity.

According to the utility model, the plurality of battery modules are glued and solidified outside the box body to form the battery module with an integrated structure, and then the battery module is carried into the box body to complete the assembly of the battery pack. So set up, be favorable to reducing the encapsulating degree of difficulty on the one hand, improve the whole assembly efficiency of battery package, reduce the battery package assembly duration, on the other hand promotes battery module's stability, and the transportation of being convenient for increases the whole package intensity of battery package simultaneously to guarantee the quality of battery package product.

In some embodiments, the adhesive material includes a structural adhesive disposed on the battery support and a foam adhesive disposed on top of the structural adhesive.

The structural adhesive has strong adhesive force, is convenient for tightly adhering and solidifying parts, but has high structural adhesive density, high price and high cost. The foaming adhesive has the characteristics of foaming, low density and low price, but has poor bonding strength and is generally used as a filler.

It should be noted that if the coaming is installed on the battery support first and then the structural adhesive is added, the structural adhesive is not beneficial to entering the junction between the coaming and the battery support, therefore, the structural adhesive needs to be poured on the battery support on which the battery core is installed first in the installation process, then the coaming is inserted, and the battery support, the coaming and the battery core can be solidified into a whole after the structural adhesive is solidified, so that the whole package strength of the battery package is increased.

In some embodiments, structural adhesive can be added to the bottom of the battery support only, so that the battery support, the coaming and the battery cells are solidified into a whole, and the whole package strength of the battery package is improved.

In some embodiments, the structural adhesive can be poured on the battery support provided with the electric core, and after the coaming is inserted, the structural adhesive is continuously poured so as to further solidify the internal parts of the battery pack and increase the whole pack strength of the battery pack.

Preferably, the structural adhesive is poured on the battery support provided with the battery core, then the coaming is inserted, after the structural adhesive is solidified, the foaming adhesive is added into the accommodating cavity to serve as a filler, so that the weight of the battery pack is reduced while the whole pack strength of the battery pack is improved, and the production cost of the battery pack is reduced. In addition, when the battery pack is extruded or collided, the exposed battery cell is easy to short-circuit, potential safety hazards are generated, and the foaming glue is used as a filler, so that the strength and stability of the battery pack can be improved, the battery cell can be insulated, and the battery short-circuit is avoided.

Compared with the method that the structural adhesive is only added at the bottom of the battery support or the structural adhesive is fully filled in the accommodating cavity, the structural adhesive is arranged on the battery support, and the foaming adhesive is arranged at the top of the structural adhesive, so that the whole package strength of the battery package can be improved, the stability of the battery package can be ensured, the weight of the battery package can be lightened, the transportation is convenient, the production cost is reduced, the battery cell can be insulated, the short circuit of the battery can be avoided, and the safety of the product can be improved.

In some embodiments, a plurality of glue flow grooves are arranged on the battery support, and the glue flow grooves are used for flowing glue materials.

It can be understood that the utility model sets up the gummosis groove on the battery support to the liquid structure glues on the battery support flows, thereby even lay on battery support surface, simultaneously, set up gummosis groove can increase the area of contact of structure glues and battery support, thereby further strengthen the whole package intensity of battery package.

In some embodiments, the battery module is arranged on the box body, and a pressure release cavity is formed between the battery bracket and the inner side surface of the box body; the battery support is provided with a plurality of pressure relief through holes, the plurality of battery cores are arranged in one-to-one correspondence with the plurality of pressure relief through holes, and the explosion-proof valve of each battery core is communicated to the pressure relief cavity through the pressure relief through hole corresponding to the battery core; the pressure release through hole is not communicated with the gummosis groove.

It should be noted that, every electric core all is equipped with explosion-proof valve, and explosion-proof valve communicates to the relief valve through the pressure release through-hole that this electric core corresponds, so sets up, and when electric core internal pressure was too big, explosion-proof valve opened, and the interior high temperature high pressure gas of electric core can discharge the battery package through the relief valve to can avoid the high temperature high pressure gas to influence other parts in the battery package.

It is also to be noted that the gummosis groove is not communicated with the pressure relief through hole, so as to avoid structural adhesive from entering the pressure relief cavity and blocking the pressure relief valve, thereby affecting the normal opening of the battery cell explosion-proof valve and generating potential safety hazards.

According to the utility model, the filled adhesive material can avoid the explosion-proof valve part of the battery core, and the battery bracket is provided with the pressure relief through hole communicated with the pressure relief valve, so that the normal opening of the explosion-proof valve is ensured, high-temperature and high-pressure gas discharged by the battery core is directly discharged into the pressure relief valve through the corresponding pressure relief through hole, and then is discharged out of the battery pack through the pressure relief valve, so that the structural strength of the battery pack is ensured, the influence of the high-temperature and high-pressure gas on other parts is effectively avoided, and the safety of the battery pack is increased.

In some embodiments, the battery pack further comprises a sealing gasket clamped between the battery support and the battery cell and used for sealing a contact gap between the pressure release through hole and the battery cell; the sealing gasket is provided with a second hole corresponding to the pressure relief through hole, the diameter of the second hole is smaller than that of the pressure relief through hole, and the diameter of the pressure relief through hole is smaller than that of the battery cell.

In some embodiments, the gasket is also used to seal the contact gap between adjacent cell supports; the sealing gasket is provided with a clearance hole corresponding to the gummosis groove, and the gummosis groove is at least partially communicated with the clearance hole.

In some embodiments, the cells are arranged in rows/columns, and a plurality of gaskets are arranged in one-to-one correspondence with the rows/columns of cells to seal contact gaps between adjacent rows/columns of cell holders; the gap between two adjacent sealing gaskets corresponds to the gumming groove to form a position avoiding part, and the position avoiding part is at least partially communicated with the gumming groove.

It is easy to understand that in order to avoid the adhesive material to get into the pressure release chamber through the pressure release through-hole to block up the relief valve, influence the normal opening of electric core explosion-proof valve, consequently set up sealed the pad between electric core and battery support, a plurality of second holes and a plurality of pressure release through-hole one-to-one intercommunication setting on sealed pad in order to avoid sealed the pad to influence the normal opening of electric core explosion-proof valve, and keep away a hole and a class gluey groove at least partial intercommunication, for adhesive material gets into the class gluey groove.

In some embodiments, the battery module further comprises: and a CCS assembly electrically connected to the positive and negative electrodes of the battery cell, the CCS assembly being provided with a first hole through which the adhesive material flows.

It should be noted that, during installation, the CCS assembly is welded and connected to the positive electrode and the negative electrode of the battery cell, and then the foaming glue is poured into the battery cell, so that the welding of the CCS assembly and the top of the battery cell is prevented from being affected by the foaming glue. Therefore, the foaming adhesive is not contacted with the positive electrode and the negative electrode of the battery cell. In addition, the CCS assembly is provided with a first hole through which the foaming gel flows to be in full contact with the surface of the battery cell, and the battery module is further cured as the foaming gel is gradually solidified, thereby increasing the overall package strength and stability.

In some embodiments, further comprising: the pressing plate is arranged at the top of the CCS component in a pressing mode and is provided with a glue filling opening and a glue overflow groove which are communicated with the accommodating cavity.

It is to be understood that the foaming adhesive is an adhesive with foaming property, so that in order to prevent the CCS assembly from being loosened by the top of the foaming adhesive, a pressing plate is arranged on the CCS assembly, and at least one adhesive filling opening and at least one adhesive overflowing groove are arranged on the pressing plate. When the battery pack is installed, the pressing plate is firstly placed on the CCS component, foam rubber is filled into the pressing plate through the rubber filling opening until the redundant rubber flows out of the rubber overflow groove, and then the foaming rubber is waited to fully contact with the internal parts of the battery pack, so that the parts comprising the pressing plate are solidified into a whole. When carrying battery module, especially when using hoist mechanism to carry battery module, can directly use the sucking disc to inhale tight clamp plate to hoist and carry whole battery module into the battery package box.

In some embodiments, the platen is made of an insulating material.

It will be appreciated that when the pressure plate is made of an insulating material such as plastic, the pressure plate can also act as an insulating plate for the CCS assembly to avoid battery shorting and potential safety hazards.

In some embodiments, the battery support and the shroud are removably connected.

In some embodiments, further comprising: and the first sealing piece is arranged at the joint of two adjacent coamings and the joint of the coamings and the battery bracket.

Specifically, after the coaming is assembled on the battery support, adhesive tapes are adhered to the junction of the coaming and the battery support and the junction of the liquid inlet channel and the liquid outlet channel and the coaming, so that the tightness of the battery module is ensured, and adhesive materials are placed for leakage.

In summary, the battery pack provided by the utility model has the following technical effects:

(1) According to the utility model, the plurality of battery modules are glued and solidified outside the box body to form the battery module with an integrated structure, and then the battery module is carried into the box body to complete the assembly of the battery pack. So set up, be favorable to reducing the encapsulating degree of difficulty on the one hand, improve the whole assembly efficiency of battery package, reduce the battery package assembly duration, on the other hand promotes battery module's stability, and the transportation of being convenient for increases the whole package intensity of battery package simultaneously to guarantee the quality of battery package product.

(2) The utility model sets up the structural adhesive on the battery support, and set up the foam adhesive on the structural adhesive top, so set up can increase the whole package intensity of the battery pack, guarantee the stability of the battery pack, can lighten the weight of the battery pack, easy to transport, lowering production cost, can also insulate the electric core, avoid the battery from shorting out, promote the product security.

(3) According to the utility model, the glue flowing groove is formed in the battery support so that the liquid structural glue flows on the battery support and is uniformly paved on the surface of the battery support, and meanwhile, the contact area between the structural glue and the battery support can be increased by the glue flowing groove, so that the whole package strength of the battery package is further enhanced.

(4) According to the utility model, the filled adhesive material can avoid the explosion-proof valve part of the battery core, and the battery bracket is provided with the pressure relief through hole communicated with the pressure relief valve, so that the normal opening of the explosion-proof valve is ensured, high-temperature and high-pressure gas discharged by the battery core is directly discharged into the pressure relief valve through the corresponding pressure relief through hole, and then is discharged out of the battery pack through the pressure relief valve, so that the structural strength of the battery pack is ensured, the influence of the high-temperature and high-pressure gas on other parts is effectively avoided, and the safety of the battery pack is increased.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of FIG. 1 without a platen;

FIG. 3 is an enlarged partial schematic view of FIG. 2A;

FIG. 4 is an enlarged partial schematic view at B in FIG. 2;

FIG. 5 is an exploded view of a battery holder;

FIG. 6 is an enlarged partial schematic view of FIG. 5C;

fig. 7 is a schematic cross-sectional structure of the case.

Wherein the reference numerals have the following meanings:

1. a battery pack; 100. a battery module; 200. a battery module;

2. a battery holder; 21. a pressure relief through hole; 22. a gumming groove;

3. a battery cell; 31. an explosion-proof valve;

4. coaming plate; 41. a receiving chamber;

5. a pressing plate; 51. a glue filling port; 52. a glue overflow groove;

6. an adhesive material; 61. structural adhesive; 62. foaming glue;

7. a case; 71. a pressure relief cavity;

8. a sealing gasket; 81. a second hole; 82. a clearance hole; 83. a first seal;

9. a CCS component; 91. a first aperture.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 2, 3 and 5, a battery pack 1 includes: the battery module 100 comprises a plurality of detachably connected coamings 4 and a plurality of battery modules 200 arranged in the coamings 4; the battery module 200 includes a battery holder 2 for accommodating the battery cells 3; the battery holders 2 of the adjacent battery modules 200 are connected in a sealed manner; a containing cavity 41 is formed between the coaming 4 and the battery module 200, and the containing cavity 41 is filled with an adhesive material 6.

The conventional battery pack structure generally requires that the battery cells be assembled into a module structure, and then the assembled module structure is assembled into a case to construct a battery pack system. The assembly process is complicated, long and time-consuming, and waste of labor and materials is great, and meanwhile, the safety and the reliability are poor because the assembly process needs to be carried out for the second time after the transfer, and the quality of the battery pack product cannot be guaranteed.

According to the utility model, the plurality of battery modules 200 are filled with glue and solidified outside the box body 7 to form the battery module 100 with an integrated structure, and then the battery module 100 is carried into the box body 7, so that the assembly of the battery pack 1 can be completed. So set up, be favorable to reducing the encapsulating degree of difficulty on the one hand, improve the whole assembly efficiency of battery package 1, reduce the battery package 1 assembly duration, on the other hand promotes the stability of battery module 100, and the transportation of being convenient for increases the whole package intensity of battery package 1 simultaneously to guarantee the quality of battery package 1 product.

Referring to fig. 1 and 2, the adhesive material 6 includes a structural adhesive 61 disposed on the battery bracket 2 and a foaming adhesive 62 disposed on top of the structural adhesive 61.

The structural adhesive 61 has strong adhesion and is convenient for adhering and curing parts, but the structural adhesive 61 has high density, high price and high cost. The foaming adhesive 62 is an adhesive with foaming characteristics, which has a low density and low price, but has poor adhesive strength, and is generally used as a filler.

It should be further noted that, if the coaming 4 is installed on the battery support 2 and then the structural adhesive 61 is added, the structural adhesive 61 is not beneficial to entering the junction between the coaming 4 and the battery support 2, therefore, the structural adhesive 61 needs to be poured on the battery support 2 with the battery core 3 installed in the installation process, then the coaming 4 is inserted, and the battery support 2, the coaming 4 and the battery core 3 can be solidified into a whole after the structural adhesive 61 is solidified, thereby increasing the whole package strength of the battery package 1.

In some embodiments, the structural adhesive 61 may be added only to the bottom of the battery support 2, so as to cure the battery support 2, the coaming 4 and the battery cell 3 into a whole, and increase the overall package strength of the battery package 1.

In some embodiments, the structural adhesive 61 may be poured onto the battery support 2 with the battery cell 3 mounted thereon, and after the coaming 4 is inserted, the structural adhesive 61 may be continuously poured, so as to further cure the internal parts of the battery pack 1, and increase the overall strength of the battery pack 1.

Preferably, in this embodiment, the structural adhesive 61 is poured onto the battery support 2 on which the battery core 3 is mounted, then the coaming 4 is inserted, after the structural adhesive 61 is solidified, the foaming adhesive 62 is added into the accommodating cavity 41 as a filler, so that the overall strength of the battery pack 1 is increased, the weight of the battery pack 1 is reduced, and the production cost of the battery pack 1 is reduced. In addition, when the battery pack 1 is extruded or collided, the exposed battery cell 3 is easy to short-circuit, potential safety hazards are generated, and the foaming glue 62 is used as a filler, so that the strength and stability of the battery pack 1 can be improved, the battery cell 3 can be insulated, and the battery short-circuit is avoided.

Compared with the method that the structural adhesive 61 is only added to the bottom of the battery support 2 or the structural adhesive 61 is fully filled in the accommodating cavity 41, the structural adhesive 61 is arranged on the battery support 2, and the foaming adhesive 62 is arranged at the top of the structural adhesive 61, so that the whole package strength of the battery package 1 can be improved, the stability of the battery package 1 can be ensured, the weight of the battery package 1 can be lightened, the transportation is convenient, the production cost is reduced, the insulation of the battery core 3 can be realized, the short circuit of the battery can be avoided, and the safety of a product can be improved.

Referring to fig. 1 and 2, the battery holder 2 is provided with a plurality of glue flowing grooves 22, and the glue flowing grooves 22 are used for flowing the adhesive material 6.

It can be understood that the glue flowing groove 22 is arranged on the battery bracket 2, so that the liquid structural glue 61 flows on the battery bracket 2 and is uniformly paved on the surface of the battery bracket 2, and meanwhile, the contact area between the structural glue 61 and the battery bracket 2 can be increased by arranging the glue flowing groove 22, so that the whole package strength of the battery package 1 is further enhanced.

In this embodiment, the pressure release through holes 21 are distributed in rows and/or columns, and the glue flowing grooves 22 and the pressure release through holes 21 are alternately distributed in the battery bracket 2. In other embodiments, the distribution manner of the glue flow grooves 22 is different according to actual requirements, and will not be described herein.

Referring to fig. 1 and 2, the battery module 100 is disposed in the case 7, and a pressure release chamber 71 is formed between the battery bracket 2 and an inner side surface of the case 7; the battery bracket 2 is provided with a plurality of pressure relief through holes 21, a plurality of battery cores 3 are arranged in one-to-one correspondence with the plurality of pressure relief through holes 21, and the explosion-proof valve 31 of the battery core 3 is communicated to the pressure relief cavity 71 through the pressure relief through hole 21 corresponding to the battery core 3; the pressure release through hole 21 and the gumming groove 22 are not communicated with each other.

It should be noted that, each electric core 3 is provided with an explosion-proof valve 31, and the explosion-proof valve 31 is communicated to the pressure release valve through the pressure release through hole 21 corresponding to the electric core 3, so that when the internal pressure of the electric core 3 is too large, the explosion-proof valve 31 is opened, and the high-temperature high-pressure gas in the electric core 3 can be discharged out of the battery pack 1 through the pressure release valve, so that the influence of the high-temperature high-pressure gas on other parts in the battery pack 1 can be avoided.

It should be noted that, the glue flowing groove 22 is not communicated with the pressure release through hole 21, so as to avoid that the structural glue 61 enters the pressure release cavity 71 and blocks the pressure release valve, thereby affecting the normal opening of the explosion-proof valve 31 of the battery cell 3 and generating potential safety hazard.

According to the utility model, the adhesive material 6 filled in the battery pack 1 can avoid the explosion-proof valve 31 of the battery cell 3, and the battery support 2 is provided with the pressure relief through hole 21 communicated with the pressure relief valve, so that normal opening of the explosion-proof valve 31 is ensured, high-temperature and high-pressure gas discharged by the battery cell 3 is directly discharged into the pressure relief valve through the corresponding pressure relief through hole 21, and then is discharged out of the battery pack 1 through the pressure relief valve, so that the structural strength of the battery pack 1 is ensured, other parts are effectively prevented from being influenced by the high-temperature and high-pressure gas, and the safety of the battery pack 1 is improved.

Referring to fig. 1 and 2 in combination with fig. 5-6, the battery pack further comprises a sealing gasket 8 sandwiched between the battery holder 2 and the battery cell 3 for sealing the contact gap between the pressure release through hole 21 and the battery cell 3; the sealing gasket 8 is provided with a second hole 81 corresponding to the pressure relief through hole 21, and the diameter of the second hole 81 is smaller than that of the pressure relief through hole 21, and the diameter of the pressure relief through hole 21 is smaller than that of the battery cell 3.

It will be appreciated that, in order to avoid the adhesive material 6 entering the pressure release chamber 71 through the pressure release through holes 21, thereby blocking the pressure release valve and affecting the normal opening of the explosion-proof valve 31 of the battery cell 3, the sealing gasket 8 is arranged between the battery cell 3 and the battery bracket 2, and the plurality of second holes 81 on the sealing gasket 8 are in one-to-one correspondence with the plurality of pressure release through holes 21, so as to avoid the sealing gasket 8 from affecting the normal opening of the explosion-proof valve 31 of the battery cell 3.

The gasket 8 also serves to seal the contact gap between adjacent cell holders 2; the sealing gasket 8 is provided with a clearance hole 82 corresponding to the gumming groove 22, and the gumming groove 22 is at least partially communicated with the clearance hole 82. In some embodiments, the gasket 8 is a whole, and the clearance hole 82 is disposed corresponding to the glue flowing groove 22, and the clearance hole 82 is at least partially communicated with the glue flowing groove 22, so that the glue material 6 enters the glue flowing groove 22.

Preferably, in this embodiment, the battery cells 3 are arranged in rows/columns, and the plurality of sealing gaskets 8 are arranged in one-to-one correspondence to the battery cells 3 in the rows/columns so as to seal the contact gaps between the two adjacent rows/columns of the battery holders 2; the gap between two adjacent sealing gaskets 8 corresponds to the glue flowing groove 22 to form a position avoiding part, the position avoiding part is at least partially communicated with the glue flowing groove 22, and the adhesive material 6 enters the glue flowing groove 22 from the position avoiding part.

Preferably, in this embodiment, the sealing pad 8 is made of EVA foam, and in other embodiments, the sealing pad 8 has different settings, which will not be described herein.

Referring to fig. 1 to 7, the present utility model has the following steps when assembled:

s1, according to the requirements of the types and the number of the battery cells 3, firstly assembling and connecting the battery supports 2 of the plurality of battery modules 200, then installing the sealing gasket 8 on the battery supports 2, and then installing the battery cells 3, wherein the end, with the explosion-proof valve 31, of the battery cells 3 needs to be installed at the pressure relief through hole 21 of the battery support 2 when installing the battery cells 3.

S2, pouring the structural adhesive 61 into the battery support 2, taking care that the structural adhesive 61 does not contact the positive electrode and the negative electrode of the battery core 3 when pouring the adhesive, assembling and connecting the coaming 4 on the battery support 2, and arranging a first sealing piece 83 at the joint of the coaming 4 and the battery support 2 and the joint of two adjacent coamings 4 to prevent the adhesive from leaking; and (5) waiting for the structural adhesive 61 to solidify, so that the battery support 2, the sealing gasket 8, the coaming 4, the battery cell 3 and other parts are solidified into a whole.

S3, welding the CCS component 9 on the positive electrode and the negative electrode of the battery cell 3, pressing the pressing plate 5 on the top of the CCS component 9, injecting the foaming glue 62 from the glue filling opening 51 of the pressing plate 5 until the excessive glue flows out from the glue overflow groove 52 on the pressing plate 5, sealing the glue filling opening 51 by using the adhesive tape, insulating the battery cell 3 from the battery cell 3 by filling the foaming glue 62, and filling the foaming glue 62 to further increase the strength and the stability of the battery module 100.

S4, placing the solidified battery module 100 into the box body 7 of the battery pack 1 through a hoisting mechanism or a carrying mechanism, thereby completing the assembly of the battery module 100 and the battery pack 1, and taking care that a pressure release cavity 71 is formed between the battery support 2 and the inner side surface of the adjacent box body 7.

Referring to fig. 1 and 2, the battery module 100 further includes: CCS assembly 9, which is electrically connected to the positive and negative poles of cell 3, CCS assembly 9 is provided with a first hole 91 for the circulation of adhesive material 6.

It should be noted that, during installation, the CCS assembly 9 is welded to the positive electrode and the negative electrode of the battery cell 3, and then the foaming glue 62 is poured into the battery cell, so that the foaming glue 62 is prevented from affecting the welding between the CCS assembly 9 and the top of the battery cell 3. It can be seen that the foam 62 is not in contact with the positive and negative electrodes of the battery cell 3. In addition, the CCS assembly 9 is provided with a first hole 91 through which the foaming glue 62 flows to be in full contact with the surface of the battery cell 3, and the battery module 100 is further cured as the foaming glue 62 is gradually solidified, thereby increasing the overall package strength and stability.

Referring to fig. 1 and 2, the method further includes: the pressing plate 5 is pressed on the top of the CCS assembly 9, and the pressing plate 5 is provided with a glue filling opening 51 and a glue overflow groove 52 which are communicated with the accommodating cavity 41.

It will be appreciated that the foam 62 is an adhesive having foaming properties, and in order to prevent the CCS assembly 9 from being released by the top of the foam 62, a pressing plate 5 is disposed on the CCS assembly 9, and at least one glue-pouring opening 51 and at least one glue-overflowing groove 52 are disposed on the pressing plate 5. During installation, the pressing plate 5 is placed on the CCS assembly 9, foam rubber 62 is filled through the rubber filling opening 51 until the excessive rubber flows out of the rubber overflow groove 52, and then the foaming rubber 62 is waited to fully contact with the internal parts of the battery pack 1, so that the parts including the pressing plate 5 are solidified into a whole. When the battery module 100 is carried, particularly when the battery module 100 is carried by using the lifting mechanism, the sucker can be directly used for sucking the pressing plate 5, so that the whole battery module 100 is lifted and carried into the box body 7 of the battery pack 1.

Referring to fig. 1 and 2, the pressing plate 5 is made of an insulating material.

It will be appreciated that when the pressure plate 5 is made of an insulating material such as plastic, the pressure plate 5 can also act as an insulating plate for the CCS assembly 9 to avoid battery shorting, creating a safety hazard.

Referring to fig. 1 and 2, the battery holder 2 is detachably connected to the shroud 4.

Preferably, in this embodiment, the peripheral side of the battery support 2 is provided with a slot, and the slot is used for being inserted into the coaming 4, so that the coaming 4 is fixed on the battery support 2, and in other embodiments, the detachable connection manner between the battery support 2 and the coaming 4 is provided differently, for example, the battery support 2 and the coaming 4 can be connected through a buckling structure.

Referring to fig. 1 and 2, the method further includes: a first seal 83 provided at the junction of the adjacent two of the enclosures 4 and at the junction of the enclosure 4 and the battery holder 2.

In the present embodiment, the first sealing member 83 is a tape. Specifically, after the coaming 4 is assembled on the battery support 2, adhesive tapes are adhered to the junction of the coaming 4 and the junction of the coaming 4 and the battery support 2 and the junction of the liquid inlet channel and the liquid outlet channel and the coaming 4, so that the tightness of the battery module 100 is ensured, and the adhesive material 6 is placed to leak.

In other embodiments, the first seal 83 can have different settings depending on the actual needs.

The battery module 100 further includes a liquid cooling plate attached to the surface of the battery cell 3. In this embodiment, the cylindrical electric cores 3 are distributed in rows and/or columns, the liquid cooling plates are arranged alternately with the electric cores 3, and the liquid cooling plates are serpentine liquid cooling plates, so that the contact area between the liquid cooling plates and the electric cores 3 is increased, and the liquid cooling effect is improved.

The liquid cooling plate is provided with a liquid inlet channel and a liquid outlet channel which penetrate through the outside of the coaming 4, and a first sealing piece 83 is arranged at the joint of the liquid inlet channel and the liquid outlet channel and the coaming 4, so that the tightness is ensured, and the liquid adhesive material 6 is prevented from flowing out from the joint of the liquid inlet channel and the liquid outlet channel and the coaming 4.

In summary, the technical means disclosed in the present utility model is not limited to the technical means disclosed in the above embodiments, but also includes technical means comprising any combination of the above technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. A battery pack (1), characterized by comprising:

a battery module (100) comprising a plurality of detachably connected coamings (4) and a plurality of battery modules (200) arranged in the coamings (4);

the battery module (200) comprises a battery bracket (2) for accommodating the battery core (3);

the battery brackets (2) adjacent to the battery modules (200) are connected in a sealing manner;

an accommodating cavity (41) is formed between the coaming (4) and the battery module (200), and an adhesive material (6) is filled in the accommodating cavity (41).

2. A battery pack (1) according to claim 1, wherein the adhesive material (6) comprises a structural adhesive (61) provided on the battery holder (2) and a foaming adhesive (62) provided on top of the structural adhesive (61).

3. A battery pack (1) according to claim 1 or 2, wherein the battery holder (2) is provided with a plurality of glue flow grooves (22), the glue flow grooves (22) being adapted for the flow of glue material (6).

4. A battery pack (1) according to claim 3, further comprising a case (7), wherein the battery module (100) is disposed in the case (7), and a pressure release chamber (71) is formed between the battery holder (2) and an inner side surface of the case (7);

the battery bracket (2) is provided with a plurality of pressure relief through holes (21), a plurality of battery cores (3) are arranged in one-to-one correspondence with the plurality of pressure relief through holes (21), and an explosion-proof valve (31) of each battery core (3) is communicated to the pressure relief cavity (71) through the pressure relief through hole (21) corresponding to the battery core (3);

the pressure relief through hole (21) is not communicated with the gumming groove (22).

5. A battery pack (1) according to claim 4, further comprising a gasket (8) interposed between the battery holder (2) and the battery cell (3) for sealing a contact gap between the pressure release through hole (21) and the battery cell (3);

the sealing gasket (8) is provided with a second hole (81) corresponding to the pressure relief through hole (21), the diameter of the second hole (81) is smaller than that of the pressure relief through hole (21), and the diameter of the pressure relief through hole (21) is smaller than that of the battery cell (3).

6. A battery pack (1) according to claim 5, wherein the gasket (8) is further adapted to seal a contact gap between adjacent battery holders (2);

the sealing gasket (8) is provided with a clearance hole (82) corresponding to the gumming groove (22), and the gumming groove (22) is at least partially communicated with the clearance hole (82).

7. A battery pack (1) according to claim 5, wherein the cells (3) are arranged in rows/columns, and a plurality of the gaskets (8) are arranged in one-to-one correspondence to the plurality of rows/columns of the cells (3) to seal contact gaps between adjacent two rows/columns of the battery holders (2);

the gap between two adjacent sealing gaskets (8) corresponds to the gumming groove (22) to form a position avoiding part, and the position avoiding part is at least partially communicated with the gumming groove (22).

8. A battery pack (1) according to any one of claims 1, 2 or 4-7, wherein the battery module (100) further comprises:

a CCS assembly (9) electrically connected to the positive and negative poles of the cell (3), the CCS assembly (9) being provided with a first hole (91) for the circulation of the adhesive material (6).

9. A battery pack (1) according to claim 8, further comprising:

the pressing plate (5) is arranged at the top of the CCS component (9) in a pressing mode, and the pressing plate (5) is provided with a glue filling opening (51) and a glue overflow groove (52) which are communicated with the accommodating cavity (41).

10. A battery pack (1) according to claim 9, wherein the pressure plate (5) is made of an insulating material.

11. A battery pack (1) according to any one of claims 1, 2, 4-7, 9 or 10, wherein the battery holder (2) and the enclosure plate (4) are detachably connected.

12. A battery pack (1) according to claim 11, further comprising:

and a first sealing member (83) provided at the junction between two adjacent coamings (4) and at the junction between the coamings (4) and the battery holder (2).