CN210628369U

CN210628369U - Battery pack

Info

Publication number: CN210628369U
Application number: CN201921623284.4U
Authority: CN
Inventors: 王宁; 贾茹; 于嘉; 宋雷雷
Original assignee: Neusoft Reach Automotive Technology Shenyang Co Ltd
Current assignee: Neusoft Reach Automotive Technology Shenyang Co Ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-05-26
Anticipated expiration: 2029-09-26

Abstract

The utility model relates to a battery pack, which comprises a shell, a battery module and a water cooling plate, wherein the battery module and the water cooling plate are arranged in the shell, the water cooling plate comprises a water chamber and a heat exchange channel communicated with the water chamber, and a heat exchange medium in the water chamber can exchange heat with the battery module through the heat exchange channel; an elastic supporting pad is arranged between the outer wall of the heat exchange channel and the bottom wall of the shell, the lower surface of the elastic supporting pad protrudes out of the lower surface of the water chamber, positioning is realized between the water chamber and the bottom wall of the shell through a positioning pin and a positioning hole, and the diameter of the positioning hole is larger than that of the positioning pin; still be equipped with the electrically conductive piece of elasticity between the diapire of water-cooling board and casing, the electrically conductive piece of elasticity is the surperficial of butt casing and water-cooling board simultaneously. The battery pack can reduce the whole weight of the battery pack, and can realize good processing property and ensure the heat exchange property of the battery module.

Description

Battery pack

Technical Field

The utility model relates to a power battery technical field, concretely relates to battery pack.

Background

The battery package includes the casing and locates the battery module in the casing, and each battery module cools off through water-cooling board, and water-cooling board among the prior art is the platelike structure that inside was equipped with the heat transfer chamber usually, and this water-cooling board is fixed with the diapire of casing, and the battery module is located the upper surface of water-cooling board and is fixed with the lateral wall of casing.

However, the water cooling plate with the plate-shaped structure and the heat exchange cavity arranged inside the water cooling plate is heavy, the side wall of the heat exchange cavity needs to be arranged as thin as possible to achieve a good heat exchange effect, and the machining process requirement is high.

Therefore, how to achieve good processing performance and ensure the heat exchange performance of the battery module while reducing the overall weight of the battery pack is a technical problem to be solved by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery package can realize the good heat transfer performance that just can guarantee the battery module of processing technology performance when alleviateing the whole weight of battery package.

In order to solve the technical problem, the utility model provides a battery pack, which comprises a shell, a battery module and a water cooling plate, wherein the battery module and the water cooling plate are arranged in the shell; an elastic supporting pad is arranged between the outer wall of the heat exchange channel and the bottom wall of the shell, the lower surface of the elastic supporting pad protrudes out of the lower surface of the water chamber, the water chamber and the bottom wall of the shell are positioned through a positioning pin and a positioning hole, and the diameter of the positioning hole is larger than the diameter of the positioning pin; and an elastic conductive piece is arranged between the water cooling plate and the bottom wall of the shell and is abutted against the surfaces of the shell and the water cooling plate.

Still be equipped with the elastic support pad between the outer wall of heat transfer passageway and the diapire of casing, this elastic support pad can play the effect of elastic support to the heat transfer passageway, so that make it can take place the heat transfer with the battery module with heat transfer passageway jack-up, at this moment, can set up thinner structure with the lateral wall of heat transfer passageway, make the light in weight and the heat transfer of this water-cooling plate effectual, the elastic support pad can avoid taking place crooked condition because heat transfer passageway's lateral wall is thinner, still can guarantee this heat transfer passageway's life when guaranteeing the heat transfer effect.

Simultaneously, the lower surface protrusion in the lower surface of hydroecium of this elastic support pad for the hydroecium also breaks away from with the diapire of casing, and therefore, can avoid the rigid contact between water-cooling board and the casing bottom, make the water-cooling board whole can the oscilaltion under the effect of elastic support pad, and then avoid the heat transfer passageway to take place the damaged condition.

In order to ensure the installation position of the water cooling plate, so that the water cooling plate can exchange heat with the battery module, the positioning is realized between the water cooling plate and the bottom wall of the shell through the positioning pin and the positioning hole, specifically, the diameter of the positioning pin is smaller than the aperture of the positioning hole, so that the positioning pin can move in the positioning hole along the axial direction of the positioning hole while realizing the positioning, and the positioning pin can float up and down in cooperation with the water cooling plate.

Still be equipped with elasticity between the diapire of water-cooling board and casing and lead electrical apparatus, this elasticity leads electrical apparatus can butt the surface of casing and water-cooling board simultaneously, that is to say, this elasticity leads electrical apparatus to press from both sides the diapire of locating the casing and the lower surface of water-cooling board to this elasticity leads electrical apparatus to be in the compression state, and elasticity leads electrical apparatus can lead electrically, guarantees equipotential between water-cooling board and the casing and is connected, avoids electric shock risk under the extreme condition. Meanwhile, the situation that air between the shell and the water cooling plate is punctured due to the fact that the locating pin is not in contact with the hole wall of the locating hole when a pressure-resistant test is carried out is avoided.

Optionally, the elastic conductive member is sleeved outside the positioning pin.

Optionally, the elastic conductive member includes two contact plates, one of the contact plates abuts against a lower surface of the water cooling plate, and the other of the contact plates abuts against a bottom wall of the housing.

Optionally, the elastic conductive member further comprises a web connected between the two contact plates, and the web and the two contact plates are integrally formed and have a zigzag side surface.

Optionally, the water chamber is provided with the positioning pins, and the bottom wall of the housing is provided with the positioning holes corresponding to the positioning pins.

Optionally, the water chamber is provided with a metal member, and the positioning pin is welded and fixed with the metal member.

Optionally, the elastic support pad is a foam of silicone.

Optionally, one end of the positioning pin facing the bottom of the housing is provided with a guiding conical surface.

Optionally, the water chamber is provided with an extending portion outwards, a first fixing structure is respectively arranged on one side of the extending portion facing the bottom wall and one side of the bottom wall facing the extending portion, second fixing structures are respectively arranged at two ends of the elastic conductive piece, and the elastic conductive piece is connected between the bottom wall and the extending portion through the first fixing structure and the second fixing structure; one of the first fixing structure and the second fixing structure is a protrusion, and the other one of the first fixing structure and the second fixing structure is an abutting hole or an abutting groove.

Optionally, the elastic conductive member is a V-shaped elastic sheet, two outer walls of two sides of an opening end of the V-shaped elastic sheet are respectively provided with an abutting surface, and the abutting surface is provided with the second fixing structure.

Optionally, the elastic conductive member further comprises a conductive cloth, and the conductive cloth wraps the outer surface of the elastic supporting pad and forms the elastic conductive member.

Optionally, the elastic supporting pad and the conductive cloth are fixed by adhesion.

Drawings

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

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

fig. 3 is a schematic structural view of a battery pack according to another embodiment.

In the accompanying fig. 1-3, the reference numerals are illustrated as follows:

1-a bottom wall of the housing;

21-water chamber, 22-heat exchange channel, 23-metal component, 24-extension part;

3-a battery module;

4-an elastic support pad;

5-positioning pin, 51-guiding conical surface;

6-positioning holes;

7-elastic conductive member, 71-contact plate, 72-web plate and 73-V-shaped elastic sheet.

81-first fixation structure, 82-second fixation structure.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-2, fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present invention; fig. 2 is a partial structural schematic view of fig. 1.

The embodiment of the utility model provides a battery pack, as shown in fig. 1, this battery pack includes the casing and locates battery module 3 and the water-cooling board in this casing, and is concrete, and this water-cooling board includes hydroecium 21 and communicates the heat transfer passageway 22 that sets up with this hydroecium 21, and is detailed, and after heat transfer medium got into hydroecium 21 by the inlet tube, heat transfer passageway 22 flowed through to take place the heat exchange with battery module 3 after, unified via hydroecium 21 rethread outlet pipe discharge, in order to guarantee this battery module 3's life.

Still be equipped with elastic support pad 4 between the diapire 1 of heat transfer passageway 22's outer wall and casing, this elastic support pad 4 can play elastic support's effect to heat transfer passageway 22, make it can take place the heat transfer with battery module 3 with heat transfer passageway 22 jack-up, at this moment, can set up thinner structure with heat transfer passageway 22's lateral wall, make the light in weight and the heat transfer of this water-cooling plate effectual, elastic support pad 4 can avoid taking place crooked condition because heat transfer passageway 22's lateral wall is thinner, still can guarantee this heat transfer passageway 22's life when guaranteeing the heat transfer effect.

Simultaneously, the lower surface protrusion in hydroecium 21 of this elastic support pad 4 for hydroecium 21 also breaks away from with the diapire 1 of casing, and consequently, can avoid the rigid contact between the diapire 1 of water-cooling board and casing, makes the water-cooling board whole can be floated from top to bottom under elastic support pad 4's effect, and then avoids heat exchange channel 22 to take place the damaged condition.

In order to ensure the installation position of the water cooling plate, so that the water cooling plate can exchange heat with the battery module 3, the positioning is realized between the water cooling plate and the bottom wall 1 of the shell through the positioning pin 5 and the positioning hole 6, specifically, the diameter of the positioning pin 5 is smaller than the aperture of the positioning hole 6, so that the positioning pin 5 can move in the positioning hole 6 along the axial direction of the positioning pin while realizing the positioning, and the positioning pin can float up and down in cooperation with the water cooling plate.

Still be equipped with elasticity between the diapire 1 of water-cooling board and casing and lead electrical component 7, this elasticity leads electrical component 7 can butt the surface of casing and water-cooling board simultaneously, that is to say, this elasticity leads electrical component 7 and presss from both sides the lower surface of diapire 1 and the water-cooling board of locating the casing to this elasticity leads electrical component 7 to be in compression state, and elasticity leads electrical component 7 can lead electrically, guarantees equipotential between water-cooling board and the casing and is connected, avoids electric shock risk under the extreme condition. Meanwhile, the situation that air between the shell and the water cooling plate is broken down due to the fact that the positioning pin 5 is not in contact with the hole wall of the positioning hole 6 when the pressure resistance test is carried out is avoided.

In the above embodiment, elastic conductive piece 7 is sleeved on the outer side of positioning pin 5, that is, elastic conductive piece 7 is provided with a mounting hole, when the device is specifically mounted, elastic conductive piece 7 is directly sleeved on the outer side of positioning pin 5, so that positioning pin 5 is located in the mounting hole, the device is convenient for mounting elastic conductive piece 7, and elastic conductive piece 7 does not need to be fixed with any one of water-cooling plate or shell, the limitation on elastic conductive piece 7 can be realized through positioning pin 5, the situation that the elastic conductive piece 7 is toppled over and separated from the shell and the water-cooling plate is avoided, and then the elastic conductive piece 7 can be simultaneously abutted to bottom wall 1 of the shell and the lower surface of the water-cooling plate, so that the equipotential and anti-puncture effects are ensured.

Of course, in this embodiment, the elastic conductive member 7 may be disposed at other positions between the casing and the water cooling plate, as long as the elastic conductive member 7 can simultaneously abut against the lower surface of the water cooling plate and the bottom wall 1 of the casing, so as to achieve the function of equipotential between the casing and the water cooling plate, and prevent the air between the casing and the water cooling plate from being punctured. Because the water-cooling board is used for cooling battery module 3, consequently, for guaranteeing its heat transfer effect, the wall thickness of this water-cooling board often sets up thinly, and with locating pin 5 or locating hole 6's position, for guaranteeing intensity, often need special treatment for the thickness of water-cooling board in this locating pin 5 or locating hole 6 department is great relatively, and intensity is higher relatively, consequently, with the electrically conductive piece 7 setting of elasticity here, can avoid taking place the electrically conductive piece 7 of elasticity and damage the condition of the lateral wall of water-cooling board.

In the above embodiment, the elastic conductive member 7 includes two contact plates 71, wherein an upper surface of one contact plate 71 abuts against a lower surface of the water-cooling plate, a lower surface of the other contact plate 71 abuts against the bottom wall 1 of the housing (herein, upper refers to a side facing the water-cooling plate, and lower refers to a side facing the bottom of the housing), and the two contact plates 71 are in surface contact with the water-cooling plate and the housing, respectively.

Certainly, in this embodiment, the elastic conductive member 7 may also be configured as a coil spring or a structure similar to a C-shaped ring, wherein the upper end surface of the coil spring is in line contact with the lower surface of the water cooling plate along the circumferential direction, the upper end and the lower end of the C-shaped ring are in point contact with the water cooling plate and the housing, respectively, the elastic conductive member 7 is configured as a scheme including two contact plates 71, and the elastic conductive member 7 can be abutted against the housing and the water cooling plate by surface contact, so as to effectively increase the contact area and ensure the conductive effect, thereby ensuring the equipotential and the breakdown-preventing performance thereof, and meanwhile, the abutting effect is stable by the contact plate 71, thereby avoiding the occurrence of the situation that the elastic conductive member 7 is damaged or deformed in the compression process, and affecting the abutting effect between the elastic conductive member and.

In the above embodiment, as shown in fig. 2, the elastic conductive member 7 further includes a web 72 connected between the two contact plates 71, and the web 72 and the two contact plates 71 are integrally formed and have a zigzag side surface. That is, the elastic conductive member 7 is a structure in which the upper surface and the lower surface of a strip plate formed through two bending processes are parallel, the middle section (the web 72) is inclined, and the angle between the two bending positions (the included angle between the web 72 and the contact plate 71) can be changed under the action of external force, so that the zigzag structure is variable in height, i.e., elastic. In detail, when the distance between the case and the water-cooling plate is reduced, the angle of the two bent portions is reduced and has a restoring force, and when the distance between the case and the water-cooling plate is increased, the angle of the two bent portions is increased and returned to the original position by the restoring force.

Of course, in this embodiment, the elastic conductive member 7 may be configured to be connected between the two contact plates 71 through a metal spring, specifically, after the installation, the spring is in a compressed state, and the restoring force of the spring in the compressed state can jack up the two contact plates 71 respectively to the upper and lower ends, so that the two contact plates 71 can abut against the water cooling plate and the housing respectively. When the elastic conductive member 7 is integrally formed and the side surface is in a zigzag shape, the manufacturing process of the elastic conductive member 7 can be simplified, additional fixing modes such as welding and bolt connection are not needed, meanwhile, the two contact plates 71 are connected through the integrally formed web 72, and compared with the scheme of connection through a spring and the like, the structural stability is better.

When the elastic conductive member 7 is sleeved outside the positioning pin 5, the web 72 and the two contact plates 71 are correspondingly provided with the mounting holes.

In the above embodiment, the water chamber 21 of the water cooling plate is provided with the above positioning pins 5, and the housing is provided with positioning holes 6 corresponding to the respective positioning pins 5. Or, in this embodiment, the housing may be further provided with a positioning pin 5, and the water-cooling plate is provided with a positioning hole 6. The scheme that the water cooling plate is provided with the positioning pin 5 is easier to process and operate compared with the scheme that the water cooling plate is provided with the positioning hole 6, as shown in fig. 2, the bottom wall 1 of the shell is a section, the positioning hole 6 is processed on the upper surface of the section (the bottom wall 1 of the shell does not need to penetrate through), meanwhile, the structure of the water cooling plate does not need to be set, and only the positioning pin 5 is fixedly connected with the bottom of the water cooling plate, so that the manufacturing process can be simplified.

In the above embodiment, the water chamber 21 is provided with the metal member 23, and the positioning pin 5 is welded and fixed to the metal member 23. Specifically, this metal component 23's concrete structure does not do the restriction, if can set up it into the fixed mounting panel of one end and hydroecium 21, the mounting panel is equipped with the mounting hole, locating pin 5 pass the mounting hole and with the upper surface welded fastening of mounting hole, perhaps set up it all can with the fixed mounting nut of hydroecium 21, of course, can also directly fix locating pin 5 with hydroecium 21 and need not to set up metal component 23, and metal component 23's setting is convenient for locating pin 5 fixed with the water-cooling board, need not to cause the influence to hydroecium 21, avoid damaging the structure of hydroecium 21 when fixing locating pin 5.

In the above embodiment, the elastic supporting pad 4 is made of silicon foam, and compared with the elastic supporting pad 4 configured as a sponge, the silicon foam can provide sufficient supporting force for the water cooling plate, thereby effectively avoiding the deformation of the heat exchange channel 22.

Further, in the present embodiment, the number of the elastic conductive members 7 is one, or two, three or more elastic conductive members may be provided, which is not limited herein. The number of the elastic conductive members 7 is set to be one, so that the whole structure can be simplified while the breakdown preventing function is achieved.

In the above embodiment, the end of the positioning pin 5 facing the bottom of the housing is provided with the guiding tapered surface 51, and it is understood that the outer diameter of the guiding tapered surface 51 is tapered from top to bottom (wherein, the upper refers to the side facing the water cooling plate, and the lower refers to the side facing the bottom wall 1 of the housing), so as to facilitate the matching of the positioning pin 5 and the positioning hole 6 during the installation.

In another embodiment, the extension portion 24 is disposed outward from the water chamber 22 of the water cooling plate, a first fixing structure 81 is disposed on a side of the extension portion 24 facing the bottom wall 1 of the housing, and a corresponding first fixing structure 81 is also disposed on a side of the bottom wall 1 of the housing facing the extension portion 24, a second fixing structure 82 is disposed at each end of the elastic conductive member 7, the second fixing structure 82 is adapted to the first fixing structure 81, and the elastic conductive member 7 can be connected between the bottom wall 1 of the housing and the extension portion 24 through the first fixing structure 81 and the second fixing structure 82. Specifically, in this embodiment, as shown in fig. 3, the first fixing structure 81 is an abutting hole or an abutting groove, and the second fixing structure 82 is a protrusion, or the first fixing structure 81 may be a protrusion, and the second fixing structure 82 may be an abutting hole or an abutting groove, which is not limited herein.

Further, in this embodiment, as shown in fig. 3, the elastic conductive member 7 is a V-shaped elastic sheet 73, the outer walls of two sides of the open end of the V-shaped elastic sheet 73 are respectively provided with an abutting surface 731, each abutting surface 731 is provided with the second fixing structure 82, the V-shaped elastic sheet 73 is in a compressed state between the extending portion 74 and the bottom wall 1 of the housing, so that two abutting surfaces 731 of the V-shaped elastic sheet 73 are respectively abutted against the extending portion 74 and the bottom wall 1 of the housing, thereby realizing the equipotential connection between the water cooling plate and the bottom wall 1 of the housing.

Alternatively, in this embodiment, the elastic conductive member 7 may be configured to have a structure with two or more bends, which is not limited herein, and the elastic conductive member 7 is configured to have a structure with a bent V-shaped elastic sheet 73, and the elastic conductive member 7 is only provided with one bend, so that the structure and the manufacturing process of the elastic conductive member 7 can be simplified. In addition, when the second fixing structure 82 is a protrusion or an abutting groove, the second fixing structure can be formed by bending the metal sheet directly, and when the second fixing structure 82 is an abutting hole, the second fixing structure can be formed by processing a hole at a corresponding position of the metal sheet directly, so that the manufacturing process is simple.

In another embodiment, still include electrically conductive cloth in this battery pack, this electrically conductive cloth parcel is in the surface of elastic support pad 4 and forms above-mentioned elastic conductive piece 7, and is concrete, and this electrically conductive cloth can be whole parcel in the surface of elastic support pad 4, also can only wrap up in the surface of partial elastic support pad 4 all can, as long as guarantee this electrically conductive cloth can simultaneously with the diapire 1 of casing and the lower surface butt of water-cooling board and can the conduction under the support of elastic support pad 4. Through the scheme that electrically conductive cloth parcel forms above-mentioned elastic conductive piece in elastic supporting pad 4, can realize the equipotential connection between the diapire 1 of casing and the lower surface of water-cooling board when not influencing the supporting role of this elastic supporting pad 4.

Further, it is fixed through the bonding between elastic support pad 4 and the electrically conductive cloth, of course, in this embodiment, do not do specific restriction to the fixed mode between elastic support pad 4 and the electrically conductive cloth, if still can be with electrically conductive cloth through tying up in the surface of elastic support pad 4 or sewing up in the surface of elastic support pad 4 all can, and the bonding is fixed can make this electrically conductive cloth and the fixed more laminating and more stable between elastic support pad 4.

Specifically, the conductive cloth in the embodiment is made by coating the surface of the polyester fiber with metals such as copper, nickel and the like, and has good conductivity, oxidation resistance and corrosivity. Of course, in this embodiment, the specific material of the conductive cloth is not required, as long as it can wrap the surface of the elastic supporting pad 4 and has better conductive performance.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The battery pack is characterized by comprising a shell, a battery module (3) and a water cooling plate, wherein the battery module and the water cooling plate are arranged in the shell, the water cooling plate comprises a water chamber (21) and a heat exchange channel (22) communicated with the water chamber (21), and a heat exchange medium in the water chamber (21) can pass through the heat exchange channel (22) and exchange heat with the battery module (3);

an elastic supporting pad (4) is arranged between the outer wall of the heat exchange channel (22) and the bottom wall (1) of the shell, the lower surface of the elastic supporting pad (4) protrudes out of the lower surface of the water chamber, the water chamber (21) and the bottom wall (1) of the shell are positioned through a positioning pin (5) and a positioning hole (6), and the diameter of the positioning hole (6) is larger than the diameter of the positioning pin (5);

an elastic conductive piece (7) is further arranged between the water cooling plate and the bottom wall (1) of the shell, and the elastic conductive piece (7) abuts against the surfaces of the shell and the water cooling plate at the same time.

2. The battery pack according to claim 1, wherein the elastic conductive member (7) is sleeved outside the positioning pin (5).

3. A battery pack according to claim 1 or 2, wherein said resilient conductive member (7) comprises two contact plates (71), one of said contact plates (71) abutting the lower surface of said water-cooled plate and the other of said contact plates (71) abutting the bottom wall (1) of said housing.

4. A battery pack according to claim 3, wherein said resilient conductive member (7) further comprises a web (72) connected between said contact plates (71), said web (72) and said contact plates (71) being integrally formed and having a zigzag configuration in side view.

5. The battery pack according to claim 1 or 2, wherein the water chamber (21) is provided with the positioning pins (5), and the bottom wall (1) of the case is provided with the positioning holes (6) corresponding to the respective positioning pins (5).

6. The battery pack according to claim 1 or 2, wherein the water chamber (21) is provided with a metal member (23), and the positioning pin (5) is welded and fixed to the metal member (23).

7. Battery pack according to claim 1 or 2, characterized in that the elastic support pad (4) is a silicon foam.

8. A battery pack according to claim 1 or 2, wherein the end of the positioning pin (5) facing the bottom of the housing is provided with a guiding taper (51).

9. The battery pack according to claim 1, wherein the water chamber (21) is provided with an extending portion (24) outwards, the extending portion (24) is provided with a first fixing structure (81) on one side of the bottom wall (1) of the housing and one side of the bottom wall (1) of the housing facing the extending portion (24), the two ends of the elastic conductive member (7) are provided with a second fixing structure (82), and the elastic conductive member (7) is connected between the bottom wall (1) of the housing and the extending portion (24) through the first fixing structure (81) and the second fixing structure (82);

one of the first fixing structure (81) and the second fixing structure (82) is a protrusion, and the other is an abutting hole or an abutting groove.

10. The battery pack according to claim 9, wherein the elastic conductive member (7) is a V-shaped spring plate (73), the outer walls of the two sides of the opening end of the V-shaped spring plate (73) are respectively provided with an abutting surface (731), and the abutting surface (731) is provided with the second fixing structure (82).

11. The battery pack of claim 1, further comprising a conductive cloth wrapped around the outer surface of the elastic support pad (4) and forming the elastic conductive member (7).

12. The battery pack according to claim 11, wherein the elastic support pad (4) and the conductive cloth are fixed by adhesion.