CN108428965B

CN108428965B - Battery pack device

Info

Publication number: CN108428965B
Application number: CN201810196310.3A
Authority: CN
Inventors: 张士杰; 徐智慧; 刘亮; 王博
Original assignee: Sunwoda Electronic Co Ltd
Current assignee: Shenzhen Xinwangda Energy Technology Co ltd; Sunwoda Electronic Co Ltd
Priority date: 2018-03-09
Filing date: 2018-03-09
Publication date: 2020-08-11
Anticipated expiration: 2038-03-09
Also published as: CN108428965A

Abstract

The invention discloses a battery pack device which comprises a battery cell, a heat dissipation assembly, a fin assembly and a fixing frame, wherein the battery cell is arranged on the battery cell; the first end of the heat dissipation assembly is fixedly arranged on the fin assembly, and the heat dissipation assembly and the fin assembly are fixed on the fixing frame; the second end of the heat dissipation assembly is fixedly connected with the battery cell; the fin assembly comprises a plurality of stacked fins, gaps are arranged among the stacked fins, and the directions of the gaps of the fins are the same as the wind direction of external wind. Through the radiating assembly who sets up, with the heat transfer to the fin assembly of electric core, carry out the forced air cooling to the fin assembly through outside wind-force, the radiating effect is fast, and the radiating effect of electric core is even, and the difference in temperature between the electric core is little.

Description

Battery pack device

Technical Field

The invention relates to the technical field of new energy, in particular to a battery pack device.

Background

Lithium battery technology has been developed rapidly in modern society, and is successfully used in mobile devices such as mobile phones and computers, but for devices with high power consumption, lithium ion single batteries with ordinary capacity often cannot meet the demand. The lithium ion single batteries need to be assembled into battery pack devices with different electric quantities and different powers according to different serial connection and/or parallel connection modes so as to meet the requirements of large-energy and high-power equipment.

Lithium batteries produce more heat loss when the discharge rate is higher. In order to control the temperature of the battery cell and ensure the safety, performance and service life of the battery pack, the heat loss of the battery pack needs to be effectively managed, and the occurrence of use safety accidents caused by poor performance is prevented. Current heat dissipation is mainly water-cooling, forced air cooling more, and water-cooling has the potential safety hazard although heat transfer efficiency is high, when carrying out the forced air cooling to electric core, although factor of safety is higher, but self heat dissipation is poor, and the difference in temperature between the electric core is great.

Therefore, the prior art has yet to be improved.

Disclosure of Invention

The invention mainly aims to provide a battery pack device with good heat dissipation effect and strong universality.

The invention provides a battery pack device, which comprises a battery cell, a heat dissipation assembly, a fin assembly and a fixing frame, wherein the battery cell is arranged on the battery cell;

the first end of the heat dissipation assembly is fixedly arranged on the fin assembly, and the heat dissipation assembly and the fin assembly are fixed on the fixing frame;

the second end of the heat dissipation assembly is fixedly connected with the battery cell;

the fin assembly comprises a plurality of stacked fins, gaps are arranged among the stacked fins, and the directions of the gaps of the fins are the same as the wind direction of external wind.

Further, the heat dissipation assembly comprises a plurality of heat pipes, a fixing strip and a silica gel pad;

the fixing strip is provided with one or more grooves for accommodating the heat pipes, and the heat pipes are fixedly arranged in the grooves;

the plurality of heat pipes are arranged side by side and arranged on one side surface of the battery core;

and a layer of silica gel pad is arranged between the heat pipe and the electric core and is mutually propped against the silica gel pad.

Furthermore, the battery also comprises a pressing plate, and the pressing plate presses the fixing strip and fixes the heat pipe on the battery core.

Further, still include insulating part, insulating part set up in the fixed strip with the periphery of heat pipe, and with the silica gel pad is closely laminated.

Further, the insulating part comprises a heat conduction insulating film, the fixing strip and the periphery of the heat pipe are coated by the heat conduction insulating film, and the heat conduction insulating film is tightly attached to the silica gel pad.

Furthermore, the heat dissipation device also comprises a fixing piece, wherein the fixing piece is used for fixing the heat dissipation assembly on the fixing frame.

Further, still include the wind channel board, the wind channel board set up in on the fin subassembly side, just the wind channel board with the fin is parallel and is provided with certain clearance, the wind channel board with clearance trend between the fin is the same with the wind direction of outside wind-force.

Furthermore, the wind power generator comprises a plurality of groups of fin assemblies, and the directions of fin gaps in each fin assembly are the same and are the same as the wind direction along the external wind power;

the fin assemblies are sequentially arranged along the wind direction of the external wind power.

Further, the distance between the fin far away from the air duct plate in each fin assembly and the air duct plate corresponding to the fin is the same, and the gaps between the fins are the same;

an air duct pipe is formed between the fins close to the air duct plate and the air duct plate;

the fin assembly is gradually increased toward the fins on one side of the wind tunnel plate in a wind direction of the external wind.

Furthermore, each fin of the fin assembly is provided with a notch which can penetrate into the heat pipe;

when the fin component is fixed on the fixing frame, the heat pipes sequentially penetrate into and are fixed in the gaps of the fins.

The battery pack device has the advantages that the heat of the battery cell is transferred to the fin component through the arrangement of the heat dissipation component, the fin component is cooled by external wind power, the heat dissipation effect is fast, the heat dissipation effect of the battery cell is uniform, and the temperature difference between the battery cells is small.

Drawings

Fig. 1 is an assembled schematic view of an embodiment of a battery pack device of the present invention;

fig. 2 is a schematic view of a heat dissipation structure of an embodiment of the battery pack apparatus of the present invention;

fig. 3 is a partial schematic view of an embodiment of the battery pack apparatus of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly, and the connection may be a direct connection or an indirect connection.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a battery pack apparatus, including a battery cell 1, a heat dissipation assembly, a fin assembly, and a fixing frame; the first end of the heat dissipation assembly is fixedly arranged on the fin assembly, and the heat dissipation assembly and the fin assembly are fixed on the fixing frame 7; the second end of the heat dissipation assembly is fixedly connected with the battery core 1; the fin assembly comprises a plurality of stacked fins 6, gaps are formed among the stacked fins 6, and the directions of the gaps of the fins 6 are the same as the wind direction of external wind.

In this embodiment, the positive and negative electrode tabs of the soft-package battery cell are used as a heat dissipation or heating channel of the battery cell, so that the temperature inside the battery cell 1 can be effectively controlled. However, the tab is a channel for conducting current inside and outside the battery cell 1, so that the heat dissipation assembly and the tab of the battery cell are arranged in an electrically insulated manner. On 1 heat of electricity core transmitted to fin assembly along radiator unit, the outside wind-force of rethread dispels the heat, and factor of safety is high, can be used to dispel the heat to soft-packaged electric core, square electricity core and cylinder electricity core or other devices that generate heat.

The heat of the battery cell 1 is transferred to the fin assembly along the heat dissipation assembly, the heat dissipation assembly comprises a heat pipe 21, the heat pipe 21 fully utilizes the heat conduction principle and the rapid heat transfer property of the phase change medium, the heat of a heating object is rapidly transferred to the outside of the battery cell 1 (heat source) through the heat pipe 21, and the heat conduction capability of the heat pipe exceeds the heat conduction capability of any other known metal, so that the battery cell 1 can dissipate heat as soon as possible, the safety of the battery pack is ensured, the performance of the battery pack is stabilized, and the service life of the.

Be fixed in one side of mount 7 with fin assembly, heat radiation assembly sets up in the upper end of mount 7, the first end fixed connection fin assembly of heat radiation assembly, second end fixed connection electric core 1 (heat source), the heat that electric core 1 is fixed in mount 7 and electric core 1 (heat source) is transmitted to heat radiation assembly by fin assembly, dispel the heat through outside wind-force, because the wind direction of outside wind-force is the same with the clearance trend between 6 fins, accelerate thermal scattering and disappearing more, the temperature of effectual control electric core, the life of extension group battery.

In the present embodiment, the heat dissipation assembly includes a plurality of heat pipes 21, a fixing strip 22 and a silica gel pad 23; the fixing strip 22 is provided with one or more grooves adapted to place the heat pipes 21, and the heat pipes 21 are fixedly placed in the grooves; many heat pipes 21 set up side by side to set up on the side of electric core 1, be provided with one deck silica gel pad 23 and support each other between heat pipe 21 and electric core 1. The silica gel pad 23 is an important part for heat transfer, and realizes a good heat transfer channel between the battery cell 1 and the heat pipe 21 and electrical insulation through deformation of the silica gel pad. Many heat pipes 21 set up side by side and the laminating of its longer one side and a side of electric core 1, because be provided with one deck silica gel pad 23 between heat pipe 21 and the electric core 1, silica gel pad 23 can be with electric core 1's heat transfer to heat pipe 21 on, and silica gel pad 23 has certain tension, pliability, good insulating nature, withstand voltage, high temperature resistant, low temperature resistant, chemical stability, consequently, prevention electric core 1 that can be better is connected with the electricity between the heat pipe 21, realizes better insulation. Wherein the fixing strip 22 serves as a main mechanical support part for protecting the heat pipe 21 from bending by fixing the heat pipe 21 and the fin 1 to the profile.

Set up fixed strip 22 and be used for with heat pipe 21 fixed laminating on electric core 1 a side, heat pipe 21 is difficult for walking the position, protection heat pipe 21 avoids crooked or warp, fixed strip 22 is provided with the recess that adaptation heat pipe 21 was placed along its length direction, heat pipe 21 can set to the rectangular body that the cross-section is runway shape or other shapes, and heat pipe 21 supports mutually and laminates through silica gel pad 23 along its length direction's a side and electric core 1, make the better transmission of heat of electric core 1 to heat pipe 21 on.

In the present embodiment, the battery pack apparatus further includes a pressing plate 3, and the pressing plate 3 presses the fixing strip 22 and fixes the heat pipe 21 to the electric core 1. The whole heat dissipation assembly is fixed by the pressing plate 3 and locked by the locking screws 4, so that mechanical fixation is completed, and good contact between the heat pipe 21 and the battery cell 1 (heat source) is ensured.

In this embodiment, the heat pipe further includes an insulating member, which is disposed on the periphery of the fixing strip 22 and the heat pipe 21, and is tightly attached to the silicone pad 23. Wherein, the insulating part includes a heat conducting insulating film 24, and the heat conducting insulating film 24 covers the fixing strip 22 and the periphery of the heat pipe 21, and is tightly attached to the silica gel pad 23. The heat-conducting insulating film 24 is an important part for pressure resistance and insulation, can well transfer heat and can realize electrical insulation, the heat-conducting insulating film 24 is coated on the peripheries of the fixing strip 22 and the heat pipe 21 and is tightly attached to the silica gel pad 23, and the heat-conducting insulating film is insulating and high-pressure resistant and can be directly fixed on a tab of the battery cell 1 or a heat source.

In this embodiment, the heat dissipation device further includes a fixing member for fixing the heat dissipation assembly on the fixing frame 7. Wherein the mounting can adopt locking screw 4, is provided with the through-hole on the clamp plate 3, and locking screw 4 passes the through-hole and locks radiator unit on electric core 1 to make radiator unit and electric core 1 closely laminate and be connected, compact structure, the heat transfer is even, guarantees that electric core 1's temperature difference is little, improves electric core 1's performance and life, simultaneously, fixed whole radiator unit accomplishes mechanical fastening, guarantees that heat pipe 21 and electric core 1 contact well.

In this embodiment, still include wind channel plate 5, wind channel plate 5 sets up on a fin assembly side, and wind channel plate 5 is parallel and is provided with certain clearance distance with fin 6, and the clearance trend between wind channel plate 5 and fin 6 is the same with the wind direction of outside wind-force. When the sealing fin assembly is vertically or leftwards and rightwards opposite to two sides, air blown into the sealing fin assembly along the gap between the air duct plate 5 and the fin 6 or the gap between the two fins 6 can be used for better air cooling of the fin 6, and heat dissipation can be better performed on other heating devices such as a soft package battery cell or a square battery cell and a cylindrical battery cell. In other embodiments, other heating devices such as a soft package battery cell or a square battery cell and a cylindrical battery cell can be cooled by water for the fin assembly.

In the embodiment, the wind power generator comprises a plurality of groups of fin assemblies, and the gaps of the fins 6 in each fin assembly are the same and are the same as the wind direction of external wind; the fin assemblies are sequentially arranged along the wind direction of external wind power. The heat pipe 21 sequentially penetrates through the fins 6 in the same fin assembly and is fixedly arranged with the fins 6, the fin assembly is sequentially and fixedly arranged on one side of the fixing frame 7 along the wind direction of external wind power, and each fin assembly is provided with at least one group of radiating assemblies.

In the present embodiment, the distance between the fins 6 far away from the air duct plate 5 in each fin assembly and the corresponding air duct plate 5 is the same, and the gaps between the fins 6 are the same; an air duct pipe is formed between the fins 6 close to the air duct plate 5 and the air duct plate 5; the fins 6 of the fin assembly on the side close to the air duct plate 5 are gradually increased along the wind direction of the external wind. The air duct pipe that sets up diminishes along the wind direction gradually, sets up air duct plate 5 and is passed through from radiating fin is inside for the guide wind, and fin 6 is the heat convection part, and outside the heat that transmits heat pipe 21 to it gived off the system through forced air cooling or water-cooling, realization its heat dissipation function that can be better. In order to make the heat dissipation of the multiple groups of fin assemblies uniform, the fin assemblies gradually decrease along the air duct pipes, the air duct pipes of the fin assemblies closer to the air source are larger, and the air quantity blown to each fin assembly by the air flow is uniform, so that the heat dissipation of each fin assembly is uniform, the temperature difference between the electric cores 1 is reduced, and the heat dissipation is more uniform.

In the present embodiment, each fin 6 of the fin assembly is provided with a notch through which the heat pipe 21 can pass; when the fin assembly is fixed on the fixing frame 7, the heat pipes 21 sequentially penetrate and are fixed in the gaps of the fins 6, and in this embodiment, the air duct pipe is a pipe formed by the fins 6 and the air duct plate 5, which are close to the air duct plate 5. The two sides which are opposite to each other arbitrarily in the direction of the wind force are sealed, so that the good heat dissipation can be realized for other heating devices such as a soft package battery cell, a square battery cell or a cylindrical battery cell while the installation position is not changed.

As shown in fig. 1, in a specific embodiment, the battery pack device includes four sets of fin assemblies, which are sequentially arranged along the length direction of the fins 6 and are arranged along the wind direction of the external wind; the fin assembly gradually reduces the fins 6 in the direction of the external wind. The quantity of fins is gradually reduced along the wind direction of external wind power, so that the heat dissipation of each group of fin components is uniform, the overall heat dissipation of the battery pack is uniform, the surface temperature difference of the heat pipe 21 is small, the temperature difference between the lug electrodes of the battery cell or the shell is small, the temperature rise of the battery cell 1 is small, the temperature consistency is ensured, and the performance and the service life of the battery cell 1 are improved. Four groups of fin assemblies are arranged in parallel, the structure is compact, heat of the battery cell 1 is guided to the fin assemblies through the heat pipe 21, and compared with the mode that air cooling and liquid cooling heat dissipation are directly carried out on the battery cell 1, the product reliability is good. Need not change mounted position simultaneously, through the positive opposite face of the difference of sealing fin 4, can realize sealing two kinds of wind channels about or, can be used for the heat dissipation to soft-packaged electrical core, square electricity core and cylinder electricity core and other devices that generate heat. The heat dissipation assembly is subjected to insulation treatment, so that the heat dissipation assembly is insulated and resistant to high voltage, and can be directly fixed on the conductor, so that the heat dissipation effect is ensured, and meanwhile, the system integration convenience and reliability are powerfully supported.

According to the battery pack device, the heat of the battery cell 1 is transferred to the fin component through the arranged heat dissipation component, the fin component is cooled by external wind power, the heat dissipation effect is fast, the heat dissipation effect of the battery cell 1 is uniform, and the temperature difference between the battery cells 1 is small.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A battery pack device is characterized by comprising a battery cell, a heat dissipation assembly, a fin assembly and a fixing frame;

the second end of the heat dissipation assembly is fixedly connected with the battery cell; the positive electrode lug and the negative electrode lug of the battery cell are used as channels for heat dissipation of the battery cell, and the heat dissipation assembly and the electrode lugs are arranged in an electrically insulated manner;

the fin assembly comprises a plurality of stacked fins, gaps are arranged among the stacked fins, and the directions of the gaps of the fins are the same as the wind direction of external wind;

the heat dissipation assembly comprises a plurality of heat pipes, a fixing strip and a silica gel pad;

2. The battery pack apparatus of claim 1, further comprising a pressure plate that presses against the fixing strip and fixes the heat pipe to the cell.

3. The battery pack device according to claim 2, further comprising an insulating member that is provided on the outer peripheries of the fixing bar and the heat pipe and is closely attached to the silicone gasket.

4. The battery pack apparatus according to claim 3, wherein the insulating member includes a thermally conductive insulating film that covers the fixing bar and the outer periphery of the heat pipe and is closely attached to the silicone gasket.

5. The battery pack apparatus of claim 1, further comprising a fixing member for fixing the heat dissipation assembly to the fixing frame.

6. The battery pack device according to claim 1, further comprising a wind channel plate disposed on a side surface of the fin assembly, the wind channel plate being parallel to the fins and being disposed with a gap distance therebetween, the gap between the wind channel plate and the fins having the same direction as a wind direction of external wind.

7. The battery pack apparatus according to claim 6, wherein a plurality of sets of the fin assemblies are included, and fin gaps in each of the fin assemblies are oriented in the same direction and the same direction as the wind along the external wind;

8. The battery pack apparatus as claimed in claim 7, wherein the fins of each fin assembly away from the air duct plate are spaced at the same distance from the air duct plate and at the same gap therebetween;

the fins on one side of the fin assembly close to the air duct plate are gradually increased along the wind direction of the external wind.

9. The battery pack device according to claim 1, wherein each of the fins of the fin assembly is provided with a notch corresponding to the heat pipe;