CN213583977U

CN213583977U - Battery module and power battery

Info

Publication number: CN213583977U
Application number: CN202023228815.5U
Authority: CN
Inventors: 叶鹏; 黄韦森; 张波
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-06-29
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to a battery provides a battery module and power battery. Battery module, include electric core module and be located the curb plate of the relative both sides of electric core module, the curb plate is the opening form for hollow structure and both ends, orientation on the curb plate the lateral wall of electric core module is inboard siding, keeps away from the lateral wall of electric core module is the outside siding, be provided with a plurality of ventilation slots on the inboard siding. Power battery be provided with foretell battery module. The utility model discloses a battery module can improve the heat dissipation homogeneity of electric core, keeps the performance of electric core, prolongs the life of battery module.

Description

Battery module and power battery

Technical Field

The utility model relates to a battery, in particular to battery module. The utility model discloses still relate to a power battery including this battery module.

Background

In recent years, new energy automobiles are increasingly heated, electric automobiles with the advantages of high efficiency, energy conservation, low emission or zero emission regain vitality, are widely regarded by all countries in the world, and are the main direction of development of international energy-saving and environment-friendly automobiles. The power battery is one of the core components of the new energy automobile, and the industrial application of the power battery is receiving more and more attention, and the requirement on a power battery management system is higher and higher.

In the process of popularization and development of new energy automobiles, the service life of a power battery is an important factor, and factors influencing the service life of the power battery are many, and except the characteristics of the battery, the consistency and the balance of an internal battery core of a battery module in the use process are also the most critical factors. At present, power battery's best operational environment is 15 ℃ to 35 ℃, and the inside electric core temperature of battery module is too high, crosses low or the difference in temperature is too big all can directly influence the power characteristic of monomer electricity core, and then can make the performance and the security of whole battery module receive the influence, and the life-span also receives serious decay.

Power battery often adopts rectangular shape modular structure when integrated, forms the battery module that has high energy density, because the size is great, the monomer is many, appears the heat dissipation inhomogeneous to electric core more easily, causes partial local high temperature of electric core, the too big phenomenon of different electric core difference in temperature easily.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a battery module to can improve the heat dissipation homogeneity of electric core, keep the performance of electric core, prolong battery module's life.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a battery module, includes electric core module and is located the curb plate of the relative both sides of electric core module, the curb plate is the opening form for hollow structure and both ends, orientation on the curb plate the lateral wall of electric core module is inboard siding wall, keeps away from the lateral wall of electric core module is the outside siding wall, be provided with a plurality of ventilation grooves on the inboard siding wall.

Furthermore, one end of the side plate is set to be a first air opening, the other end of the side plate is set to be a second air opening, and the first air opening is larger than the second air opening.

Further, the curb plate includes first curb plate section and second curb plate section, the inboard siding of first curb plate section with the inboard siding of second curb plate section is located the coplanar, the inboard siding of first curb plate section and outside siding parallel arrangement, the distance between the inboard siding of second curb plate section and the outside siding reduces gradually.

Further, the battery cell module comprises a plurality of battery cells stacked on each other, and a rubber strip is arranged between every two adjacent battery cells.

Further, the rubber strips are located on the upper side and the lower side of the battery cell.

Further, the ventilation grooves are arranged to be of long strip structures extending along the length direction of the side plates.

Furthermore, at least one air deflector is distributed in the side plate along the height direction, and extends along the length direction of the side plate.

Further, the side plates are integrally formed.

Compared with the prior art, battery module have following advantage:

(1) the openings at the two ends of the side plate in the battery module can be respectively used as air inlets, and the ventilation grooves on the side plate wall are matched, so that the openings at any one end of the side plate can be flexibly selected as the air inlets according to the actual heating condition of the electric core in the electric core module, and the size, the shape, the quantity and the distribution of the ventilation grooves are adjusted simultaneously, so that the air quantity and the air speed transmitted to the electric core by the side plate are adaptive to the local heating quantity of the electric core, thereby improving the heat dissipation uniformity and the heat dissipation efficiency of the electric core, being suitable for the superposition or arrangement condition of various electric cores, improving the service performance of the electric core and prolonging the service life of the battery module; further, the ventilation groove can carry out the vortex to the cooling air that the curb plate transmitted to electric core to guarantee better that the heat dissipation between the electric core is even.

(2) Be provided with the rubber strip between the electric core of battery module, only paste in the upper and lower position of electric core, can form sufficient inflation space between electric core, make simultaneously to form sufficient air inlet space between the electric core, guarantee that the heat dissipation of electric core two sides is even.

Another object of the utility model is to provide a power battery to can improve the heat dissipation homogeneity of electric core, keep the performance of electric core, prolong the life of battery module.

a power battery is provided with the battery module of any one of the above technical schemes.

Further, the power battery is also provided with a cooling air driving device for supplying cooling air to the side plates.

The advantages of the power battery and the battery module are the same as those of the battery module in the prior art, and are not described herein again.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

fig. 2 is an exploded view of the structure of the battery module shown in fig. 1;

fig. 3 is a schematic structural diagram of a side plate according to an embodiment of the present invention.

Description of reference numerals:

1 cell module 11 cell

12 bus bar 13 end plate

14 cover plate 15 insulating plate

16 rubber strip 2 side plate

21 first tuyere 22 second tuyere

23 inner side panel wall 24 outer side panel wall

25 ventilating slot 26 air deflector

27 first side plate segment 28 second side plate segment

Detailed Description

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

In addition, the directional terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", and the like used in the embodiments of the present invention indicate the directional or positional relationship based on the directional or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific directional orientation, and be operated, and thus, should not be construed as limiting the present invention.

It is to be understood that, unless expressly stated or limited otherwise, the terms "connected," "mounted," and "contacting" are intended to be open-ended, i.e., connected as either a fixed or removable connection or an integral connection; the components may be directly connected or indirectly connected through an intermediate medium, or the components may be connected through an intermediate medium or the components may be in an interactive relationship with each other. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, and therefore the features defined "first", "second" may explicitly or implicitly include one or more of the features described.

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

The utility model provides a battery module, refer to fig. 1 to fig. 3, including electric core module 1 and the curb plate 2 that is located the relative both sides of electric core module 1, curb plate 2 is the opening form for hollow structure and both ends, and the lateral wall that is towards electric core module 1 on the curb plate 2 is inboard siding 23, keeps away from electric core module 1 is outside siding 24, is provided with a plurality of ventilation slots 25 on inboard siding 23.

In the present invention, the side plates 2 disposed on the two opposite sides of the electrical core module 1 can be respectively used as air ducts for providing cooling air to the electrical core module 1, that is, the two side plates 2 on the two sides respectively use one end opening thereof as an air inlet, specifically, the air inlet and the air outlet of the two side plates 2 are determined according to the local temperature difference of the electrical core module 1, and the sizes of the two end openings of the side plates 2 can also be correspondingly designed; the ventilation slots 25 on the inner side wall 23 of each side plate 2 are different in size and shape, and the number and distribution of the ventilation slots 25 can be correspondingly designed according to the local temperature difference and characteristics of the cell modules 1.

The utility model discloses above-mentioned basic technical scheme's battery module, when using, according to the different local temperature difference in both sides of electric core module 1 and local calorific capacity characteristic, at first the one end opening of selected curb plate 2 is as the air intake, the size of ventilation groove 25 on two curb plates 2 is do not again, the shape, quantity and distribution carry out different designs, then install curb plate 2 in the one side that corresponds on electric core module 1, make the cooling air get into from the air intake of curb plate 2, and transmit to electric core module 1 from ventilation groove 25, so that transmit to electric core 11's the amount of wind and wind speed and the local calorific capacity of electric core 11 and suit, thereby can improve heat dissipation homogeneity and the radiating efficiency to electric core 11.

As a preferred embodiment of the present invention, one end of the side plate 2 is set as the first tuyere 21, the other end is set as the second tuyere 22, and the first tuyere 21 is larger than the second tuyere 22. At this time, according to different local temperature differences of the electric core module 1, the two side plates 2 may use the first air ports 21 of the two side plates 2 as air inlets, or use the first air port 21 of one of the side plates 2 as an air inlet, and use the second air port 22 of the other side plate 2 as an air inlet, or use the second air ports 22 of the two side plates 2 as air inlets, and the two side plates 2 may be arranged in the same direction, that is, the first air ports 21 of the two side plates 2 correspond to each other, or arranged in a reverse direction, that is, the first air port 21 of one side plate 2 corresponds to the second air port 22 of the other side plate 2, so as to provide the cooling air volume and the cooling air speed adapted to the local temperature characteristics of the electric core module 1.

Preferably, the side plate 2 comprises a first side plate section 27 and a second side plate section 28, the inner side plate wall 23 of the first side plate section 27 and the inner side plate wall 23 of the second side plate section 28 are located on the same plane, the inner side plate wall 23 of the first side plate section 27 and the outer side plate wall 24 are arranged in parallel, and the distance between the inner side plate wall 23 and the outer side plate wall 24 of the second side plate section 28 is gradually reduced. When the side plate 2 is designed, the angle formed between the outer side plate wall 24 and the inner side plate wall 23 of the second side plate section 28 can be adjusted, so that the size of the air duct in the first side plate section 27 is the same, and the size of the air duct in the second side plate section 28 is gradually reduced, so that the air volume and the air speed of the cooling air entering the side plate 2 from the first air opening 21 or the second air opening 22 can be adjusted.

The utility model discloses in, curb plate 2 is integrated into one piece spare for the structural stability of curb plate 2 is high. The side plate 2 is preferably formed by extrusion of aluminum, so that the side plate 2 is simple in machining process and low in production cost.

As a preferred embodiment of the present invention, referring to fig. 3, the ventilation grooves 25 are provided in a long structure extending in the longitudinal direction of the side plate 2. At this moment, the length extending direction of ventilation groove 25 is the same as the length extending direction of curb plate 2, and when curb plate 2 lets in the cooling air, not only can form the vortex effect to the cooling air, can also improve the amount of wind of transmitting to electric core module 1 from ventilation groove 25, and then improve the radiating efficiency to electric core module 1.

Preferably, at least one air deflector 26 is distributed in the side plate 2 along the height direction, and the air deflector 26 extends along the length direction of the side plate 2, so that the cooling air entering the side plate 2 from the first air port 21 or the second air port 22 can be uniformly dispersed in the height direction of the side plate 2, and meanwhile, the air flow fields in the height direction of the side plate 2 are independent from each other, and the air volume and the air speed near the ventilation groove 25 can be more finely adjusted.

As a preferred embodiment of the present invention, the battery cell module 1 includes a plurality of battery cells 11 stacked on each other, and a rubber strip 16 is disposed between two adjacent battery cells 11. The utility model discloses in, rubber strip 16 can adopt any one to have elasticity or contractibility's rubber materials to make, and it is cotton to be preferred silicon rubber bubble, has excellent resistance to compression characteristic, still has weatherability and ageing resistance simultaneously to guarantee to provide sufficient expansion space to electric core 11. The rubber strip 16 separates between the adjacent electric cores 11, and because of the contractility of the rubber strip 16 itself, when the electric cores 11 expand due to too high local temperature in the using process, the adjacent electric cores 11 are not extruded, so that the safety of the electric cores 11 is improved, and the service performance of the electric cores 11 is maintained.

Preferably, the rubber strips 16 are located at upper and lower sides of the battery cell 11, so that an expansion space is formed for the battery cell 11, and meanwhile, a sufficient air inlet space is formed between the battery cells 11, so as to increase the contact area and the contact time between the battery cell 11 and the cooling air, and ensure the uniformity of heat dissipation on both sides of the battery cell 11.

As a preferred embodiment of the present invention, the battery module further includes a casing for accommodating a plurality of battery cells 11, the casing generally includes two end plates 13 and two cover plates 14, the two end plates 13 and the two cover plates 14 are connected to each other, the battery cells 11 are installed in the casing, and the bus bar 12 is provided between the side plate 2 and the battery cells 11. The bus bar 12 is used for realizing efficient connection of a plurality of battery cells 11, and the bus bar 12 may be disposed between two side plates 2 and the battery cells 11, or between one of the side plates 2 and the battery cells 11.

Further preferably, the end plate 13 is parallel to the battery cell 11 and an insulating plate 15 is disposed therebetween, the length direction of the side plate 2 is parallel to the stacking direction of the battery cell 11, and the end plate 13 is welded to the side plate 2. The end plate 13 is usually set to the metal sheet to can realize the welding with curb plate 2, thereby improve curb plate 2 and electric core module 1's firm in connection nature, make the holistic structural stability of battery module improve. At this moment, the end plate 13 is separated from the battery cell 11 by the insulating plate 15, so that the electric signal transmission between the end plate 13 and the battery cell 11 is avoided, and the safety of the battery module is improved. The length direction of the side plate 2 is parallel to the stacking direction of the battery cells 11, so that the side plate 2 can transmit the cooling air input from the first air opening 21 or the second air opening 22 to each battery cell 11, thereby improving the heat dissipation efficiency of the battery cell module 1.

As an embodiment of the relative optimization of the battery module in the present invention, the battery module includes a cell module 1, a side plate 2, two end plates 13, two cover plates 14 and a busbar 12, the cell module 1 includes a plurality of cells 11 stacked on each other, the end plates 13 are parallel to the cells 11 and have insulating plates 15 therebetween, the end plates 13 are welded to the side plate 2, and rubber strips 16 located at the upper and lower sides of the cells 11 are disposed between two adjacent cells 11; the length direction of the side plate 2 is parallel to the stacking direction of the battery cells 11, the side plate 2 is formed by extrusion of aluminum materials, the side plate 2 is of a hollow structure, two ends of the side plate are open, one end of the side plate 2 is provided with a first air opening 21, the other end of the side plate is provided with a second air opening 22, the first air opening 21 is larger than the second air opening 22, the side wall of the side plate 2 facing the battery cell module 1 is an inner side plate wall 23, the side wall far away from the battery cell module 1 is an outer side plate wall 24, the inner side plate wall 23 is provided with a plurality of ventilation grooves 25, the ventilation grooves 25 are strip-shaped grooves which are irregularly distributed and extend along the length direction of the side plate 2, the side plate 2 comprises a first side plate section 27 and a second side plate section 28, the inner side plate wall 23 of the first side plate section 27 and the inner side plate wall 23 of the second side plate section 28 are positioned on the same plane, the inner side plate wall 23 of the first side plate section 27 and, two air deflectors 26 are distributed in the side plate 2 along the height direction, and the air deflectors 26 extend along the length direction of the side plate 2.

The battery module provided in this embodiment, during the design, according to the different local temperature difference and the local calorific capacity characteristic of the both sides of electric core module 1, at first select the air intake (first wind gap 21 or second wind gap 22) and the direction that the air intake set for of curb plate 2, carry out different designs to the size, shape, quantity and the distribution of ventilation groove 25 on two curb plates 2 respectively again. The installation process can be as follows: the two end plates 13 are respectively connected with the insulating plates 15, the battery cell 11 and the rubber strip 16 are sequentially overlapped between the insulating plates 15 on the two end plates 13 at intervals, the side plates 2 and the bus bar 12 are installed on two sides of the battery cell 11, and finally the two cover plates 14 are installed.

Cooling air is introduced into the side plate 2 from the first air port 21 or the second air port 22, the cooling air enters the side plate 2 along the air deflector 26, and is simultaneously conveyed to the electric core 11 and a ventilation space between the electric cores 11 from the ventilation groove 25, so that both sides of the electric core 11 can be contacted with the cooling air, the cooling air is diffused into the air after being contacted with the electric cores 11, so as to take away heat of the electric cores 11, and realize heat dissipation of the electric cores 11, and simultaneously, under the action of local turbulence of the ventilation groove 25, the air volume and the air speed of the cooling air contacted with the electric cores 11 are different, so as to adapt to local temperature difference and local heat generation property in the electric core module 1, and perform targeted heat dissipation on the electric cores 11, so that consistency and balance among different electric cores 11 are kept, and the over-high temperature, over-low temperature or over-large temperature difference of part of the electric cores 11 is avoided, thereby keeping the power property of the single electric cores 11, the service life of the battery module is prolonged.

On the basis of the utility model discloses foretell battery module, the utility model discloses the second aspect provides a power battery, is provided with an arbitrary technical scheme of above-mentioned battery module. Preferably, the power battery is further provided with a cooling wind driving device for supplying cooling wind to the side plate 2 so as to input the cooling wind from an air inlet of the side plate 2. Therefore, the battery module has at least all the advantages brought by the technical scheme of the embodiment of the battery module.

As can be seen from the above description, the present invention provides a battery module, wherein the openings at the two ends of the side plate 2 can be respectively used as air inlets, and the ventilation slots 25 on the inner side plate wall 23 are matched, so as to flexibly select the opening at any end of the side plate 2 as the air inlet according to the actual heating condition of the electric core inside the electric core module 1, and adjust the size, shape, quantity and distribution of the ventilation slots 25, so that the air volume and the air speed transmitted from the side plate 2 to the electric core 11 are adapted to the local heating value of the electric core 11, thereby improving the heat dissipation uniformity and the heat dissipation efficiency of the electric core 11, not only being suitable for the superposition or arrangement condition of various electric cores 11, but also improving the service performance of the electric core 11 and prolonging the service life; further, the ventilation grooves 25 can disturb the cooling air transmitted from the side plates 2 to the battery cells 11, so as to better ensure that the heat dissipation between the battery cells 11 is uniform.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a battery module, its characterized in that includes electric core module (1) and is located curb plate (2) of the relative both sides of electric core module (1), curb plate (2) are the opening form for hollow structure and both ends, on curb plate (2) towards the lateral wall of electric core module (1) is inboard siding (23), keeps away from the lateral wall of electric core module (1) is outside siding (24), be provided with a plurality of ventilation slots (25) on inboard siding (23).

2. The battery module according to claim 1, wherein one end of the side plate (2) is provided as a first air opening (21) and the other end is provided as a second air opening (22), and the first air opening (21) is larger than the second air opening (22).

3. The battery module according to claim 2, wherein the side plate (2) comprises a first side plate section (27) and a second side plate section (28), the inner side plate wall (23) of the first side plate section (27) and the inner side plate wall (23) of the second side plate section (28) are located on the same plane, the inner side plate wall (23) of the first side plate section (27) and the outer side plate wall (24) are arranged in parallel, and the distance between the inner side plate wall (23) and the outer side plate wall (24) of the second side plate section (28) is gradually reduced.

4. The battery module according to any one of claims 1 to 3, characterized in that the cell module (1) comprises a plurality of cells (11) stacked on top of each other, and a rubber strip (16) is arranged between two adjacent cells (11).

5. The battery module according to claim 4, characterized in that the rubber strips (16) are located on the upper and lower sides of the battery cell (11).

6. The battery module according to any one of claims 1 to 3, wherein the ventilation grooves (25) are provided in an elongated structure extending in the length direction of the side plates (2).

7. The battery module according to any one of claims 1 to 3, wherein at least one air deflector (26) is distributed in the side plate (2) along the height direction, and the air deflector (26) extends along the length direction of the side plate (2).

8. The battery module according to any one of claims 1 to 3, wherein the side plates (2) are an integrally formed member.

9. A power battery, characterized in that the battery module according to any one of claims 1 to 8 is provided.

10. The power battery according to claim 9, characterized in that the power battery is further provided with a cooling wind driving device for supplying cooling wind to the side plate (2).