CN212967942U

CN212967942U - Battery module

Info

Publication number: CN212967942U
Application number: CN202022067412.0U
Authority: CN
Inventors: 祁鹏飞
Original assignee: Beijing CHJ Automobile Technology Co Ltd
Current assignee: Beijing CHJ Automobile Technology Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-04-13
Anticipated expiration: 2030-09-18

Abstract

The present disclosure relates to the field of battery technology, and in particular, to a battery module. Including a plurality of electric cores and the female row of setting on the utmost point post of electric core, the top surface of electric core is equipped with the liquid cooling pipe, and the liquid cooling pipe is located the cavity that forms between two utmost point posts of electric core, and dodges mutually between the explosion-proof valve of electric core, and the upper surface of liquid cooling pipe still is equipped with the heat-conducting plate that can carry out the heat transfer with the liquid cooling pipe. According to the battery, the liquid cooling pipe is arranged on the top surface of the battery cell, so that the battery cell can absorb heat most comprehensively, and rapid heat exchange between the battery cell and the liquid cooling pipe is realized; the liquid cooling pipe is located between two utmost points of electric core, then can effectively utilize the space between the utmost point post to effectively reduce the whole height of electric core, set up the heat-conducting plate then can with the liquid cooling trade between carry out abundant heat transfer and increase heat transfer area, and then improve the radiating efficiency.

Description

Battery module

Technical Field

The present disclosure relates to the field of battery technology, and in particular, to a battery module.

Background

In the prior art, when the battery cell is assembled into a module, a plurality of battery cell poles are generally required to be electrically connected with the busbar. The module can also include basic elements such as collection line, and the collection line is connected every female arranging and is used for female voltage and/or the temperature signal of arranging of collection. The module generally further includes a top cover for isolating the bus bar, the collecting line and other components above the module from the outside.

In order to dispel the heat to the battery module, department of generating heat at electric core generally can set up liquid cooling pipe and heat-conducting plate, thereby dispel the heat to the battery module through the mode of heat transfer, wherein, the heat-conducting plate lid is established on electric core, the liquid cooling pipe is located the top of heat-conducting plate, the heat of electric core passes through the heat-conducting plate and transmits to the liquid cooling pipe, but liquid cooling pipe and heat-conducting plate pile up like this after can occupy great space, consequently can enlarge the overall structure of battery module to a certain extent, be unfavorable for the miniaturization of battery module structure.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem or at least partially solve the technical problem, the present disclosure provides a battery module.

The utility model provides a battery module, including a plurality of electric cores and the female row of setting on the utmost point post of electric core, its characterized in that, the top surface of electric core is equipped with the liquid cooling pipe, and the liquid cooling pipe is located the cavity that forms between two utmost point posts of electric core, and dodges mutually between the explosion-proof valve of electric core, and the upper surface of liquid cooling pipe still is equipped with the heat-conducting plate that can carry out the heat transfer with the liquid cooling pipe.

Optionally, the heat conducting plate comprises a main body plate and contact plates located at two sides of the main body plate;

the contact plate is located the utmost point post top of electric core, and the main part board is located between the contact plate, and the contact plate is used for with the female heat transfer of contact between arranging correspondingly.

Optionally, each contact plate is composed of a plurality of contact pieces, and one contact piece at least corresponds to a pole of one battery cell.

Optionally, the lower surface of every contact all is equipped with the holding tank of upwards sunken, and the holding tank corresponds the utmost point post installation of electric core.

Optionally, the bottom wall of the accommodating groove is provided with glue overflow holes.

Optionally, the heat conducting plate is a heat conducting insulating plate.

Optionally, the heat conducting plate is a metal plate, and a first insulating layer is arranged between the contact plate and the busbar.

Optionally, a protection structure for protecting the first insulating layer is further disposed between the contact plate and the busbar.

Optionally, the heat-conducting plate is a metal plate, a preformed hole is formed in the contact plate corresponding to the welding seam of the busbar, and the second insulating layer is arranged on the upper surface, the lower surface, the side wall and the inner wall of the preformed hole of the contact plate.

Optionally, the liquid cooling pipe is a U-shaped pipe, two arms of the liquid cooling pipe are respectively arranged on two sides of the explosion-proof valve of the battery cell, and the heat-conducting plate is provided with an exhaust hole corresponding to the explosion-proof valve.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

according to the battery, the liquid cooling pipe is arranged on the top end surface of the battery cell, so that the battery cell can absorb heat most comprehensively, and rapid heat exchange between the battery cell and the liquid cooling pipe is realized; because the utmost point post of electric core has certain height, consequently, can the vacuole formation between two utmost point posts of electric core, through making the liquid cooling pipe be located the cavity between two utmost point posts of electric core, then with the heat-conducting plate setting at the top of liquid cooling pipe, then can effectively utilize the space between the utmost point post to effectively reduce the whole height of electric core, and then reduced the height of whole battery module, make the battery module can be to miniaturized development. The heat conducting plate is arranged, so that heat can be fully exchanged between the heat conducting plate and the liquid cooling pipe, the heat exchange area is increased, and the heat radiation efficiency is improved. In addition, because the heat-conducting plate sets up the top at the liquid cooling pipe, consequently, the heat-conducting plate can play the effect of battery module upper cover to a certain extent, can need not to set up extra upper cover to the cost is reduced to a certain extent.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is an exploded view of the overall structure of the present disclosure;

FIG. 2 is a schematic illustration of the location of the exhaust passage in the present disclosure;

FIG. 3 is a schematic bottom perspective view of a thermal conductive plate according to the present disclosure;

fig. 4 is a top view of a thermally conductive plate of the present disclosure;

FIG. 5 is a schematic view of the installation of a protective structure according to an embodiment of the disclosure;

FIG. 6 is a schematic structural view of a protective structure according to the present disclosure;

fig. 7 is a schematic diagram illustrating a coating of the first insulating layer and the contact plate according to an embodiment of the disclosure.

1, an electric core; 2. a busbar; 3. a liquid-cooled tube; 4. an explosion-proof valve; 5. a heat conducting plate; 6. glue overflow holes; 7. accommodating grooves; 8. a contact piece; 9. a first insulating layer; 10. an exhaust hole; 11. a limiting column; 12. a limiting block; 13. an exhaust passage.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

Please refer to fig. 1 and 2, the present disclosure provides a battery module, which includes a plurality of battery cores 1 and a busbar 2 disposed on the terminal of the battery core 1, a liquid cooling pipe 3 is disposed on the top surface of the battery core 1, the liquid cooling pipe 3 is located in a cavity formed between two terminals of the battery core 1, and is avoided from the explosion-proof valve 4 of the battery core 1, and a heat conducting plate 5 capable of exchanging heat with the liquid cooling pipe 3 is further disposed on the upper surface of the liquid cooling pipe 3.

In the above embodiment, as exemplified by the plurality of battery cells 1 being connected in series with each other, the plurality of battery cells 1 are uniformly arranged along a fixed direction. The positive and negative poles of adjacent electric core 1 are opposite in position, so that the adjacent poles of the adjacent electric core 1 can be electrically connected through the busbar 2, and the connection of the whole battery module is realized.

The main heating part of the electric core 1 is positioned at the top end of the electric core, so that the liquid cooling pipe 3 is arranged on the surface of the top end of the electric core 1, the most comprehensive heat absorption of the electric core 1 can be realized, and the rapid heat exchange between the electric core 1 and the liquid cooling pipe 3 is realized; the liquid cooling pipe 3 is positioned between the two polar columns of the electric core 1, so that the space between the polar columns can be effectively utilized, the overall height of the electric core 1 is effectively reduced, and the heat conducting plate 5 is arranged to fully exchange heat with liquid cooling and increase the heat exchange area, so that the heat dissipation efficiency is improved; since the top end of the conventional battery cell 1 is generally provided with the explosion-proof valve 4, the liquid cooling pipe 3 needs to be avoided so that the explosion-proof valve 4 can work normally.

Referring to fig. 1, in some embodiments, the heat conductive plate 5 includes a main body plate and contact plates at both sides of the main body plate;

the contact plate is located the utmost point post top of electric core 1, and the main part board is located between the contact plate, and the contact plate is used for arranging the heat transfer of contact between 2 with corresponding female arranging.

In the above-mentioned embodiment, then further optimize the structure of heat-conducting plate 5, embody that the both sides of heat-conducting plate 5 are equipped with the contact plate that is used for contacting the heat transfer with female row 2, the benefit that sets up like this is that can be used for absorbing the heat that comes from female row 2 through this contact plate, this heat transfer to heat-conducting plate 5 can enlarge heat radiating area, and this heat still can absorb through the liquid cooling pipe 3 with the contact of heat-conducting plate 5 to improve the holistic radiating effect of structure.

It needs to be emphasized that, because the structure of the heat conducting plate 5 is optimized, the top end of the battery core 1 is completely covered and protected, so that an additional cover plate is not needed, the vertical height of the battery module is further reduced, the material consumption of the cover plate is saved, the heat conducting plate 5 provided with the contact plate can realize the heat dissipation effect and can play an effective protection effect, and certain ingenuity is achieved.

In some embodiments, the contact plates and the corresponding busbars 2 are connected by a heat conducting structural adhesive.

In the above embodiment, the heat-conducting contact between the contact plate and the busbar 2 can be realized by arranging the heat-conducting structural adhesive, and the connection strength between the contact plate and the busbar 2 can be ensured.

Preferably, a heat-conducting structural adhesive can be filled between the liquid cooling tube 3 and the battery cell 1. Under the condition that the liquid cooling pipe 3 and the heat conducting plate 5 are arranged in a split structure, heat conducting structural adhesive can be filled between the liquid cooling pipe 3 and the heat conducting plate 5.

Referring to fig. 3, in some embodiments, the lower surface of each contact 8 is provided with an accommodating groove 7 that is recessed upward, and the accommodating groove 7 is installed corresponding to a terminal of the battery cell 1.

In prior art, female 2 arranging and utmost point post are generally laser welding, and the welding seam shape is the ring form generally, and welding back welding seam or welding slag may be protruding in female 2 surfaces of arranging, consequently sets up holding tank 7 corresponding welding seam position heat-conducting plate 5, and holding tank 7 can correspond the welding seam shape and set to circularly, and the diameter is greater than the biggest overall dimension of welding seam, and the degree of depth of holding tank 7 is decided according to the in-service use condition.

Referring to fig. 3 to 5, in some embodiments, each contact plate is formed by a plurality of contact pieces 8, and one contact piece 8 corresponds to at least one terminal of the battery cell 1.

In the above embodiment, the structure of the contact plate is further disclosed, and since each electric core 1 may have a difference in shape, that is, a height error, there is generally a height difference between adjacent poles, although the contact plate is in contact with the busbar 2 for heat exchange, the height difference also affects the flatness of the surface of the busbar 2, and causes a height difference between adjacent busbars 2, so that each contact plate is formed by a plurality of contact pieces 8, and thus, the connection between a single contact piece 8 and a pole can be realized corresponding to each pole, thereby improving the stability and strength of the connection between the two.

Preferably, the junction of the contact plate 8 and the heat conducting plate 5 may be provided with a weak seam, so as to facilitate the bending of the contact plate 8 to realize effective butt joint with the busbar 2.

In general, the contact plate is connected to the corresponding busbar 2 by a heat conducting structural adhesive. The heat conduction contact between the contact plate and the busbar 2 can be realized by arranging the heat conduction structural adhesive, and the connection strength of the contact plate and the busbar 2 can be ensured.

Referring to fig. 3, in some embodiments, the bottom wall of the accommodating groove 7 is provided with a glue overflow hole 6.

The glue overflow holes 6 are arranged, so that air in the heat-conducting structure glue can be conveniently discharged, and redundant glue can be conveniently discharged, and the connecting effect is improved.

Further, holding tank 7 can correspond the setting in the bottom of every contact 8, and overflow and glue hole 6 and can open the top of establishing holding tank 7, sets up like this and can make overall structure arrange scientific and reasonable more, the manufacturing of being convenient for.

In some embodiments, the thermally conductive plate 5 is a thermally conductive and insulating plate.

In the above embodiment, the material of the heat conducting plate 5 is specifically disclosed, and since the heat conducting plate 5 has an insulating property, an additional insulating layer is not required to be arranged between the heat conducting plate 5 and the busbar 2.

Specifically, the heat conducting plate 5 and the busbar 2 are connected through a heat conducting structure glue.

In some embodiments, the heat conducting plate 5 is a metal plate, and a first insulating layer 9 is disposed between the contact plate and the busbar 2.

In the above embodiment, the heat conducting plate 5 is another embodiment, and the metal material has a higher heat conducting property than the heat conducting and insulating material, but there may be a problem of poor electric conduction, etc., so the first insulating layer 9 can be provided to increase the safety factor of the structure.

Specifically, the first insulating layer 9 may be a single-layer sheet structure such as a heat-conducting silicone pad or a single-layer insulating film structure, and is disposed between the contact plate and the busbar 2, and the first insulating layer 9 may also be a heat-conducting structural adhesive filled between the contact plate and the busbar 2. It should be emphasized that the "between the contact plate and the busbar 2" mentioned in the present embodiment is not limited to the relative region therebetween, but should satisfy the design requirement of making the size of the first insulating layer 9 meet the creepage distance and the electric gap from the busbar 2 to the heat conducting plate 5.

Further, the contact plate is coated, and referring to fig. 7, the first insulating layer 9 may be a double-layer sheet structure, and is located on the upper and lower sides of the contact plate, the edges of the double-layer sheet structure may be directly connected by bonding or hot pressing, and the gaps between the adjacent contact pieces 8 may also be directly connected by hot pressing. Since the inner sides of the first insulating layers 9 cannot be attached to each other, the inner sides of the first insulating layers 9 still need to be extended inward so that the creepage distance and the electric clearance between the busbar 2 and the heat conducting plate 5 can meet the design requirements.

Above-mentioned two kinds of modes all are to carrying out insulation treatment to heat-conducting plate 5, and on the same way, still can arrange 2 to female row and carry out insulation treatment, for example: the insulating powder may be sprayed, the first insulating layer 9 may be covered, and the like. Of course, insulating materials can be arranged on the busbar 2 and the heat conducting plate 5 to realize redundant protection.

It should be noted that, because the busbar 2 needs to be welded with the pole of the battery cell 1, certain areas of the upper surface and the lower surface of the busbar 2 cannot be coated or sprayed. If the insulating scheme of the busbar 2 is a coating mode, the coating mode of the heat conducting plate 5 can be referred, the insulation film is required to be hollowed out at the corresponding welding position, and after the busbar 2 and the pole are welded, insulation treatment such as covering or spraying can be carried out on the hollowed-out position.

Referring to fig. 6, in some embodiments, a protection structure for protecting the first insulating layer 9 is further disposed between the contact plate and the busbar 2.

In the above embodiment, since the first insulating layer 9 is provided, in order to prevent the first insulating layer 9 from being damaged due to the contact between the contact plate and the busbar 2, a protection structure may be provided therebetween, so as to prevent the contact between the contact plate and the busbar 2, and thus the first insulating layer 9 can be effectively protected.

Specifically, this protection architecture can be including being located excessive spacing post 11 of gluing hole 6 and connecting at spacing post 11 both ends and being located the stopper 12 of both sides about the contact plate respectively, then can be with spacing post 11 effectual fixing in excessive gluing hole 6 through setting up stopper 12, the stopper 12 that is located the below simultaneously still can with female row 2 laminating mutually and play the supporting role. Preferably, the limiting column 11 can be in interference fit with the glue overflow hole 6 to avoid falling off, and in order to facilitate the cooperation of the protection structure and the glue overflow hole 6, the limiting block 12 can be made of a flexible structure such as rubber, or the limiting block 12 located above can be matched with the glue overflow hole 6 in a buckling manner.

Furthermore, the protection structure can be provided with a through hole to play the role of the glue overflow hole 6 originally.

It should be noted that, because the glue overflow hole 6 is formed, the overall structure of the first insulating layer 9 is not complete, and in order to ensure the electrical distance and the creepage distance between the contact plate and the busbar 2, the size of the lower limiting block 12 needs to be optimized so as to meet the design size. Secondly, the inner wall of the glue overflow hole 6 can be insulated independently, for example, insulating powder can be sprayed on.

In some embodiments, the heat conducting plate 5 is a metal plate, a preformed hole is formed in the contact plate corresponding to the welding seam of the busbar 2, and the upper surface, the lower surface, the side wall and the inner wall of the preformed hole of the contact plate are all provided with a second insulating layer.

The benefit of this embodiment lies in, can be with contact plate and female 2 equipment in advance together, heat-conducting plate 5 is simultaneously as female support of arranging 2, thereby wholly put the top at electric core 1, because the contact plate corresponds female welding seam department of arranging 2 and has been equipped with the preformed hole, consequently, heat-conducting plate 5 is putting back on electric core 1, the accessible should be preformed the hole and is welded female the female utmost point post of arranging 2 and electric core 1, and this preformed hole also need not to dodge the welding seam again, also need not consider the problem that the welding seam destroys the insulating layer, and heat-conducting plate 5 can be with female 2 equipment in advance of arranging, the combination intensity of the two is also more firm.

It is specific, the second insulating layer can be the insulating film, can set up one deck second insulating layer earlier in heat-conducting plate 5's top, make the second insulating layer exceed heat-conducting plate 5's edge and exceed the preformed hole certain distance, then also set up one deck second insulating layer in female top of arranging 2, this second insulating layer also exceeds female edge of arranging 2 and carries out the fretwork in the position that lies in welding seam department, edge and the position that corresponds the preformed hole between the upper and lower two-layer second insulating layer carry out the hot pressing, thereby can make heat-conducting plate 5's upper surface, the lower surface lateral wall and the inside insulating film that has all covered in preformed hole, thereby effectively guaranteed heat-conducting plate 5's insulating effect.

Further, the below of female row 2 also continues to set up one deck second insulating layer, this second insulating layer surpasss female edge of arranging 2 and carries out the fretwork in the position that lies in welding seam department, it surpasss female partial overlap and the pressfitting of arranging 2 top insulating film with lieing in female row of 2 top of arranging, also can continue to extend to the insulating film department at 5 edges of heat-conducting plate, thereby make the insulating film of 5 tops of heat-conducting plate, overlap each other and hot pressing between the edge of the insulating film of female row 2 top and female row 2 below insulating film, thereby effectively guaranteed the stability of the combination between heat-conducting plate 5 and female row 2, and compare in the cementation mode, this embodiment intensity is higher and difficult damaged.

Preferably, the insulating film may be replaced by spraying insulating powder.

Referring to fig. 2 and 4, in some embodiments, the liquid cooling tube 3 is a U-shaped tube, two arms of the liquid cooling tube 3 are respectively disposed on two sides of the explosion-proof valve 4 of the battery cell 1, and the heat conducting plate 5 is provided with an exhaust hole 10 corresponding to the explosion-proof valve 4.

In the above embodiment, the shape of the liquid cooling pipe 3 is specifically disclosed, and it is configured as a U-shaped pipe, and the end portions of the two arms are used for entering and exiting the liquid cooling medium, this configuration also can be used for effectively avoiding the explosion-proof valve 4, and the opening of the U-shaped pipe can be formed as the exhaust passage 13 after the explosion-proof valve 4 is opened. Further, by adding a fire-retardant coating or pasting a fire-retardant material, such as a mica sheet, an aerogel felt, etc., on the surface of the heat-conducting plate 5 facing the explosion-proof valve 4, the fire-retardant coating area may be limited to the width of the exhaust passage 13.

Preferably, still can be equipped with the conducting strip between liquid cooling pipe 3 and electric core 1, this conducting strip also is the U style of calligraphy with the shape phase-match of liquid cooling pipe 3, through setting up the conducting strip, then can realize transmitting the heat of electric core 1 upper surface to liquid cooling pipe 3, the both sides of this conducting strip still can with utmost point post or female 2 contacts of arranging to further improve liquid cooling pipe 3's radiating effect.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a battery module, is in including a plurality of electric cores (1) and setting female arranging (2) on the utmost point post of electric core (1), its characterized in that, the top surface of electric core (1) is equipped with liquid cooling pipe (3), liquid cooling pipe (3) are located in the cavity that forms between two utmost point posts of electric core (1), and with dodge mutually between explosion-proof valve (4) of electric core (1), the upper surface of liquid cooling pipe (3) still be equipped with can with heat-conducting plate (5) that liquid cooling pipe (3) carry out the heat transfer.

2. The battery module according to claim 1, wherein the heat conductive plate (5) comprises a main body plate and contact plates located at both sides of the main body plate;

the contact plates are located above the poles of the battery cells (1), the main body plates are located between the contact plates, and the contact plates are used for contact heat exchange with the corresponding busbars (2).

3. The battery module according to claim 2, characterized in that each contact plate is composed of a plurality of contact pieces (8), and one contact piece (8) corresponds to at least one pole of the battery cell (1).

4. The battery module according to claim 3, characterized in that the lower surface of each contact piece (8) is provided with an upward-concave accommodating groove (7), and the accommodating grooves (7) are arranged corresponding to the poles of the battery cells (1).

5. The battery module according to claim 4, wherein the bottom wall of the accommodating groove (7) is provided with a glue overflow hole (6).

6. The battery module according to any one of claims 2 to 5, wherein the heat conductive plate (5) is a heat conductive insulating plate.

7. The battery module according to any one of claims 2 to 3, wherein the heat-conducting plate (5) is a metal plate, and a first insulating layer (9) is provided between the contact plate and the busbar (2).

8. The battery module according to claim 7, wherein a protection structure for protecting the first insulating layer (9) is further arranged between the contact plate and the busbar (2).

9. The battery module according to any one of claims 2 to 3, wherein the heat conducting plate (5) is a metal plate, a preformed hole is formed in the contact plate corresponding to the welding seam of the busbar (2), and second insulating layers are respectively arranged on the upper surface, the lower surface, the side wall and the inner wall of the preformed hole.

10. The battery module according to claim 1, wherein the liquid cooling tube (3) is a U-shaped tube, two arms of the liquid cooling tube (3) are respectively disposed on two sides of the explosion-proof valve (4) of the battery core (1), and the heat conducting plate (5) is provided with an exhaust hole (10) corresponding to the explosion-proof valve (4).