CN217035899U

CN217035899U - Battery module and energy storage device with same

Info

Publication number: CN217035899U
Application number: CN202220440969.0U
Authority: CN
Inventors: 刘学文
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-07-22
Anticipated expiration: 2032-03-02

Abstract

The utility model discloses a battery module and an energy storage device with the same, wherein the battery module comprises: casing, electric core and busbar. The shell is provided with an accommodating space; the battery cell is arranged in the accommodating space; the busbar is used for electrically connecting a plurality of electric cores, and is provided with the cooling plate portion that extends towards the casing on the busbar, and the cooling plate portion is suitable for the heat transfer that produces the busbar to the casing. From this, through the contact of the cooling plate portion on the busbar with the casing, can make battery module when filling fast good radiating effect, reduce the risk of electric core thermal runaway in the battery module, increase battery module's security.

Description

Battery module and energy storage device with same

Technical Field

The utility model relates to the field of batteries, in particular to a battery module and an energy storage device with the same.

Background

Along with the acceleration of life rhythm, the speed of charging of conventional battery module can't satisfy daily demand, has appeared can realize the battery module of quick charge.

However, in the technical scheme of the fast-charging battery module, a user generally needs to charge the electric quantity of the battery cell of the battery module from 0 to 80% within 15 minutes, and according to the battery cell with the specification of 150Ah as an example, the current in the fast-charging process can reach as high as 600A to 700A, in the charging process, due to the internal resistance of the battery cell and the internal resistance of a wire harness, a large amount of heat is generated during high-current charging, especially the heat accumulation in a busbar and a pole column area is severe, and great test is provided for the heat dissipation efficiency of the battery module.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a battery module, which can dissipate a large amount of heat generated at positive and negative electrode posts of a battery cell when the battery cell is rapidly charged, so that the battery module has a good heat dissipation effect when the battery module is rapidly charged, thereby improving the safety of the battery module in the use process.

The utility model also aims to provide an energy storage device with the battery module.

According to the battery module of the embodiment of the present invention, the battery module includes: casing, electric core and busbar. The shell is provided with an accommodating space; the battery cell is arranged in the accommodating space; the busbar is used for electrically connecting a plurality of the battery cells, and the busbar is provided with a cooling plate portion extending towards the shell, and the cooling plate portion is suitable for transferring heat generated by the busbar to the shell.

According to the battery module provided by the embodiment of the utility model, the battery cell is arranged in the accommodating space of the shell, and the bus bar is used for electrically connecting the battery cell by connecting the positive and negative pole posts of the battery cell. When battery module carries out quick charge, inside and the busbar of electric core can be through great electric current, because busbar itself has resistance, again because the busbar is connected with utmost point post, can produce a large amount of heats on the busbar, at this moment through the cooling plate that the busbar extends towards the casing, can make busbar and battery module's casing contact, in order to conduct the heat of piling on the busbar on the casing to the casing, again because the casing is used for holding electric core, casing itself has great surface area, can make the heat of busbar conduction spread rapidly, in order to reach radiating purpose. Through the contact of the cooling plate part on the busbar and the shell, the battery module can have a good heat dissipation effect when being charged quickly, the risk of thermal runaway of the battery core in the battery module is reduced, and the safety of the battery module is improved.

In some embodiments, the housing comprises: the cooling plate comprises a side plate and end plates positioned at two ends of the side plate, wherein the side plate is constructed into a liquid cooling plate, and a cooling plate part extends towards the side plate.

In some embodiments, the battery module further comprises: and the signal acquisition board is positioned above the side board, one side of the signal acquisition board is attached to the side board, and the other side of the signal acquisition board is attached to the cooling board part.

Further, the width of the signal acquisition board is greater than the width of the side board, and the outer side edge of the signal acquisition board is flush with the outer side edge of the side board.

Optionally, the width of the signal acquisition board is 1mm to 1.5mm greater than the width of the side board.

In some embodiments, both sides of the signal acquisition board are provided with insulating heat conducting films.

In some embodiments, the bus bar comprises: the cooling plate part is bent downwards relative to the bus bar body.

In some embodiments, the width of the busbar body is greater than the width of the cooling plate portion.

In some embodiments, the accommodating space is provided with a plurality of columns of the battery cells, a middle side plate is arranged between two adjacent columns of the battery cells, and the cooling plate parts of the bus bars on two sides of the middle side plate are arranged in a staggered manner in the length direction of the battery module.

According to the energy storage device provided by the embodiment of the utility model, the battery module provided by the embodiment is arranged in the energy storage device.

According to the energy storage device provided by the embodiment of the utility model, the battery module is arranged in the energy storage device, so that the energy storage device has a good heat dissipation effect when being charged at high power, and the safety of the energy storage device is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view schematically illustrating a battery module according to an embodiment of the present invention.

Fig. 2 is a plan view of a partial structure at a bus bar of a battery module according to an embodiment of the present invention.

Fig. 3 is a schematic diagram illustrating a relationship between a side plate and a signal collecting plate of a battery module according to an embodiment of the present invention.

Fig. 4 is a partially enlarged view of a point a in fig. 1.

Reference numerals:

a battery module 100,

A shell 10, a side plate 11, an end plate 12,

An electric core 20,

A bus bar 30, a cooling plate 31, a bus bar body 32,

A signal acquisition board 40.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A battery module 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1, according to a battery module 100 of an embodiment of the present invention, the battery module 100 includes: the case 10, the battery cell 20, and the bus bar 30. The housing 10 has an accommodating space; the battery cell 20 is arranged in the accommodating space; the bus bar 30 is used to electrically connect the plurality of battery cells 20, and the bus bar 30 is provided with a cooling plate portion 31 extending toward the casing 10, and the cooling plate portion 31 is adapted to transfer heat generated by the bus bar 30 to the casing 10.

According to the battery module 100 of the embodiment of the utility model, the battery cells 20 are disposed in the accommodating space of the casing 10, and the bus bar 30 connects the positive electrode pole and the negative electrode pole of the adjacent battery cells 20 through connection, or connects the like electrode poles of the adjacent battery cells 20, so as to realize series and/or parallel connection of the battery cells 20 in the battery module 100, that is, to realize electrical connection of a plurality of battery cells 20.

Wherein, when battery module 100 carries out quick charge, the inside of electric core 20 and busbar 30 can be through great electric current, because busbar 30 itself has resistance, because busbar 30 is connected with the utmost point post again, can produce a large amount of heats on the busbar 30, through set up the cooling plate portion 31 towards casing 10 extension on busbar 30 this moment, can make busbar 30 and battery module 100's casing 10 carry out the contact heat dissipation, in order to conduct the heat of accumulating on the busbar 30 to casing 10, again because casing 10 is used for holding electric core 20, casing 10 itself has great surface area, can make the heat of busbar 30 conduction diffuse rapidly, in order to reach radiating purpose.

Through the contact between the cooling plate portion 31 on the bus bar 30 and the housing 10, the battery module 100 can perform high-power discharge at a high speed and daily time, and has a good heat dissipation effect, so that the risk of thermal runaway of the battery cell 20 in the battery module 100 is reduced, and the safety of the battery module 100 is improved.

It should be noted that, in actual use, a plurality of battery modules 100 may be provided in a vehicle, one battery module 100 may be packaged separately as power of the vehicle, or a plurality of battery modules 100 may be packaged in series to improve battery capacity in the vehicle, so that the vehicle has better cruising performance, and may be selected according to actual use requirements.

As shown in fig. 1, in some embodiments, the housing 10 includes: a side plate 11 and end plates 12 at both ends of the side plate 11, the side plate 11 being configured as a liquid-cooled plate, the cooling plate portion 31 extending toward the side plate 11. Through curb plate 11 and the end plate 12 that is located curb plate 11 both ends, form the accommodation space that is used for holding electric core 20, curb plate 11 constructs as the liquid cooling board, and cooling plate portion 31 contacts with curb plate 11 through extending to curb plate 11. When the battery module 100 is charged or discharged at a high power, the heat generated by the poles of the battery cells 20 and the bus bar 30 can be conducted to the side plate 11 through the cooling plate portion 31, the cooling medium in the side plate 11 can disperse the heat through flowing, and finally the temperature of the poles of the battery cells 20 and the bus bar 30 is kept at a low level, so that the safety of the battery module 100 during the high-power charging is improved.

And, through constructing curb plate 11 as the liquid cold drawing, extend the cooling plate portion 31 of busbar 30 to curb plate 11, when improving battery module 100 self radiating effect and to the cooling effect of busbar 30, need not to set up the cold drawing structure alone and dispel the heat, can make battery module 100's structure compacter, when assembling battery module 100 to electric vehicle on, can make battery module 100 have bigger electric quantity under the same volume, thereby increase the continuation of the journey of vehicle, improve user's use and experience.

It should be noted that, the type of the cooling liquid in the liquid cooling plate is not particularly limited, for example, the cooling liquid includes media with high specific heat capacity, such as glycerin, ethylene glycol, and water, and may be selected according to actual needs as long as the liquid cooling plate is ensured to have a good heat dissipation effect.

As shown in fig. 1 and 2, in some embodiments, the battery module 100 further includes: and the signal acquisition board 40 is positioned above the side board 11, one side of the signal acquisition board 40 is attached to the side board 11, and the other side of the signal acquisition board 40 is attached to the cooling board part 31. In the operation of the battery module 100, the vehicle needs to detect the operating state of the battery module 100 in real time, for example, the temperature, current and voltage changes of the battery module 100, so as to determine whether the operating state of the battery module 100 is normal, and a signal acquisition board 40 is disposed in the battery module 100, so as to acquire various information in the battery module 100 and feed the information back to a user through a control chip of the battery module 100, so that the user can determine the state of the battery module 100. Set up signal acquisition board 40 in curb plate 11 top, on the one hand, signal acquisition board 40 sets up the position more rationally, and it is more convenient to electric core 20's signal acquisition, and the signal acquisition board 40 outside has the insulating layer, can form insulating protection between busbar 30 and curb plate 11, prevents to appear the overlap joint between busbar 30 and the curb plate 11, leads to electric core 20 or battery module 100 to appear the short circuit phenomenon to improve battery module 100's security.

As shown in fig. 3, further, the width of the signal collecting plate 40 is larger than the width of the side plate 11, and the outer side edge of the signal collecting plate 40 is flush with the outer side edge of the side plate 11.

Specifically speaking, the outer border of signal acquisition board 40 and the outer border parallel and level of curb plate 11 can make battery module 100 form enclosed construction in the appearance, and when a plurality of battery module 100 carried out the built-up assembly, enclosed construction can make and realize better laminating between the battery module 100, and then saved battery module 100's installation space. The width of signal acquisition board 40 is greater than the curb plate 11 width, again because the outside border of signal acquisition board 40 is along the same level with the outside border of curb plate 11, and signal acquisition board 40 is in the inboard border protrusion in the inboard border of curb plate 11 promptly.

Therefore, when the cooling plate portion 31 of the bus bar 30 extends to the side plate 11, the signal collecting plate 40 can ensure that the bus bar 30 is spaced apart from the side plate 11, and further prevent a short circuit between the bus bar 30 and the side plate 11, so as to improve the reliability of the insulation protection of the signal collecting plate 40 on the bus bar 30, and further make the battery module 100 safer.

Optionally, the width of the signal acquisition board 40 is 1mm to 1.5mm greater than the width of the side board 11. Therefore, the signal acquisition board 40 can be ensured to form good insulation protection between the bus bar 30 and the side board 11, and the safety of the battery module 100 is further improved.

Optionally, the signal acquisition board 40 is configured as a flexible circuit board. Therefore, the signal collecting board 40 is covered with an adhesive film (i.e. an insulating film, which may be made of a high temperature resistant insulating polyimide material) during the manufacturing process, and the adhesive film may provide an insulating condition between the bus bar 30 and the side board 11, thereby increasing the safety.

In some embodiments, both sides of the signal acquisition board 40 are provided with insulating heat conductive films. Therefore, the effect of insulating protection between the bus bar 30 and the side plate 11 by the signal acquisition plate 40 can be further increased while ensuring that the heat of the cooling plate part 31 is sufficiently conducted to the side plate 11, and the safety is increased.

In the conventional scheme, generally, the parts needing insulation are spaced by arranging the insulating heat conducting sheets, in the application, the insulating heat conducting films (i.e. polyimide layers) are arranged on the two sides of the signal acquisition board 40, so that the cost can be reduced while the signal acquisition board 40 is ensured to have good insulating heat conducting performance, the thickness of the insulating heat conducting films is low, heat conduction of the cooling board parts 31 on the bus bars 30 to the side plates 11 is facilitated, and the heat dissipation capacity of the battery module 100 is improved.

As shown in fig. 4, in some embodiments, the bus bar 30 includes: a bus bar body 32 and a cooling plate portion 31 located on one side of the bus bar body 32, wherein the cooling plate portion 31 is bent downward relative to the bus bar body 32. In the process of assembling the battery module 100, the pole of the battery cell 20 protrudes from the upper surface of the battery cell 20, after the bus bar 30 is mounted on the battery cell 20, the bus bar 30 is raised, the lower surface of the cooling plate portion 31 on the bus bar 30 is higher than the side plate 11 when extending onto the side plate 11, the cooling plate portion 31 is bent downward relative to the bus bar body 32, so that after the bus bar 30 is mounted on the battery cell 20, the cooling plate portion 31 is tightly attached to the upper surface of the side plate 11, thereby increasing the heat dissipation effect of the side plate 11 on the bus bar 30, and enabling the battery module 100 to have better safety when performing high-power charging or discharging.

As shown in fig. 4, in some embodiments, the width of the busbar body 32 is greater than the width of the cooling plate portion 31. Therefore, the weight of the bus bar 30 can be reduced while ensuring the cooling efficiency of the cooling plate portion 31 of the bus bar 30, and the overall weight of the battery module 100 can be reduced, so that the vehicle has better cruising performance when the battery module 100 is mounted on the vehicle.

As shown in fig. 1, in some embodiments, a plurality of columns of battery cells 20 are provided in the accommodating space, an intermediate side plate is provided between two adjacent columns of battery cells 20, and the cooling plate portions 31 of the bus bars 30 on two sides of the intermediate side plate are staggered in the length direction of the battery module 100. Be less than the width of busbar 30 through the width that makes cooling plate portion 31 to setting cooling plate portion 31 in one side of busbar 30, making multiseriate electric core 20 install cooling plate portion 31 of adjacent two sets of electric core 20 can crisscross setting when the accommodation space, reduce battery module 100's volume, can set up more electric cores 20 in limited space when battery module 100 assembles to the vehicle, and then increase the vehicle continuation of the journey, improve user's use and experience.

According to the energy storage device of the embodiment of the utility model, the battery module 100 of the embodiment is provided in the energy storage device.

According to the energy storage device provided by the embodiment of the utility model, the battery module 100 provided by the embodiment of the utility model is arranged in the energy storage device, so that the energy storage device has a good heat dissipation effect when being charged and discharged at high power, and the safety of the energy storage device is improved.

It should be noted that the energy storage device may be an energy device that can realize multiple cycles of charging and discharging by using one or more of the above battery modules 100, for example: the battery pack and the energy storage device may also be an electric device that can realize multiple cycles of charging and discharging by using one or more of the above battery modules 100, for example: provided is an electric vehicle.

In the description of the present invention, it is to be understood that the terms "length", "width", "thickness", "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. The "first feature" and the "second feature" may include one or more of the features. "plurality" means two or more. The first feature may be "on" or "under" the second feature and may include the first and second features being in direct contact, or the first and second features being in contact via another feature not being in direct contact. The first feature being "on," "over" and "above" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery module, comprising:

a housing (10), the housing (10) having an accommodating space;

the battery cell (20), the battery cell (20) is arranged in the containing space;

a busbar (30), the busbar (30) being used for electrically connecting a plurality of the battery cells (20), and a cooling plate portion (31) extending toward the housing (10) being provided on the busbar (30), the cooling plate portion (31) being adapted to transfer heat generated by the busbar (30) to the housing (10).

2. The battery module according to claim 1, wherein the housing (10) comprises: curb plate (11) and be located curb plate (11) both ends end plate (12), curb plate (11) are constructed for the liquid cold board, cooling plate portion (31) orientation curb plate (11) extend.

3. The battery module of claim 2, further comprising: the signal acquisition board (40), signal acquisition board (40) are located the top of curb plate (11), and one side with curb plate (11) laminating, the opposite side with the laminating of cooling plate portion (31).

4. The battery module according to claim 3, wherein the width of the signal collecting plate (40) is greater than the width of the side plate (11), and the outer side edge of the signal collecting plate (40) is flush with the outer side edge of the side plate (11).

5. The battery module according to claim 4, wherein the width of the signal collecting plate (40) is 1mm to 1.5mm greater than the width of the side plate (11).

6. The battery module according to claim 3, wherein both sides of the signal collection plate (40) are provided with insulating heat conductive films.

7. The battery module according to claim 1, wherein the bus bar (30) includes: the cooling plate comprises a bus bar body (32) and a cooling plate part (31) located on one side of the bus bar body (32), wherein the cooling plate part (31) is bent downwards relative to the bus bar body (32).

8. The battery module according to claim 7, wherein the width of the bus bar body (32) is larger than the width of the cooling plate portion (31).

9. The battery module according to claim 1, wherein the accommodation space has a plurality of columns of the battery cells (20), an intermediate side plate is disposed between two adjacent columns of the battery cells (20), and the cooling plate portions (31) of the bus bars (30) on two sides of the intermediate side plate are staggered in a length direction of the battery module (100).

10. An energy storage device, comprising: the battery module (100) of any of claims 1-9.