CN215771340U

CN215771340U - Battery pack and new energy vehicle

Info

Publication number: CN215771340U
Application number: CN202121928833.6U
Authority: CN
Inventors: 何亚飞; 其他发明人请求不公开姓名
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-02-08
Anticipated expiration: 2031-08-17

Abstract

The utility model belongs to the technical field of new energy automobiles, and discloses a battery pack and a new energy automobile, wherein the battery pack adopts a battery cell stack body, avoids the use of a battery module structure, is convenient to install, and can reduce the cost and weight of the battery pack; the size of the battery cell stacking body can be flexibly designed according to actual use requirements, so that the space utilization rate of the battery pack and the energy density of the battery pack can be greatly improved; each battery cell stacking body is provided with an independent water cooling plate, so that the cooling efficiency of the battery cell stacking body is improved, and the performance of the battery pack is improved; a liquid cooling channel is arranged in the first beam of the frame of the battery pack shell, and the liquid cooling channel does not occupy the internal space of the battery pack, so that the space utilization rate and the energy density of the battery pack are indirectly improved; the new energy vehicle is low in production cost and use cost.

Description

Battery pack and new energy vehicle

Technical Field

The utility model relates to the technical field of new energy vehicles, in particular to a battery pack and a new energy vehicle.

Background

With the development of science and technology and the continuous improvement of quality of life, new energy automobiles are more and more popular, and new energy automobiles driven by power batteries are the most popular. The power battery can produce a large amount of heat in the use process, and the performance and the service life of the power battery are adversely affected, so that a water cooling system is often used for heat dissipation of the power battery in the prior art. At present, the battery module of the traditional power battery is bonded on a water-cooling plate through structural adhesive for heat dissipation. However, since the energy density of the battery module is low, and when the battery module fails, the battery module is not convenient to disassemble, and the maintenance cost is high. In addition, the existing blade battery is high in manufacturing difficulty and cost, and the new energy vehicle using the blade battery is low in vehicle body strength, especially the torsional strength of the vehicle body.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery pack and a new energy vehicle, which are used for improving battery grouping efficiency, improving energy density, reducing manufacturing difficulty and reducing material and manufacturing cost.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a battery pack which comprises a shell and at least one group of battery cell stacking bodies, wherein an accommodating cavity is formed in the shell, the at least one group of battery cell stacking bodies are arranged in the accommodating cavity along the length direction or the width direction of the shell, the shell comprises a shell body and an upper cover, and the upper cover can be arranged at an opening of the shell body in a covering manner so as to form the accommodating cavity; the battery cell stacking body comprises a shell, a water cooling bottom plate and a frame, wherein the frame is arranged along the circumferential direction of the water cooling bottom plate, the water cooling bottom plate comprises at least one group of water cooling plates, each water cooling plate is of a hollow structure, cooling liquid is contained in each hollow structure, and at least one group of battery cell stacking bodies can be supported on the corresponding group of water cooling plates respectively; the frame comprises two groups of first beams and two groups of second beams, the two groups of first beams are arranged at intervals in parallel, the two groups of second beams are arranged at intervals and are perpendicular to the two groups of first beams, and two ends of each second beam are respectively connected with the end parts of the two groups of first beams; the liquid cooling structure is characterized in that liquid cooling channels are arranged in the first beams and are communicated with the radiator, two ends of the water cooling plate can be respectively abutted against the two groups of the first beams, and the hollow structure can be communicated with the liquid cooling channels.

Preferably, the first beam is L-shaped and comprises a side beam and a supporting beam, the end of the water-cooling plate can be abutted to the side beam, one end of the water-cooling plate can be supported on the corresponding supporting beam, and the liquid-cooling channel is located in the supporting beam.

Preferably, the water cooling plate is provided with two water nozzles, the two water nozzles are respectively located at two ends of the water cooling plate, the supporting beam is provided with at least one access hole, and the water nozzles can be inserted into the corresponding access holes.

Preferably, a sealing element is arranged between the water nozzle and the access hole.

Preferably, the two water nozzles are arranged diagonally.

Preferably, the water-cooling plate is connected to the support beam by bolts.

Preferably, the battery pack comprises a plurality of groups of battery cell stacking bodies, and a heat insulation buffer part is clamped between the plurality of groups of battery cell stacking bodies.

Preferably, the heat insulation buffer part is made of a heat insulation buffer material.

Preferably, the battery pack comprises a plurality of groups of battery cell stacking bodies, and the plurality of groups of battery cell stacking bodies are bonded and connected.

The utility model further provides a new energy vehicle which comprises the battery pack.

The utility model has the beneficial effects that:

the battery pack provided by the utility model comprises a shell and at least one group of battery cell stacking bodies, wherein a containing cavity is arranged in the shell, and the at least one group of battery cell stacking bodies are arranged in the containing cavity along the length direction or the width direction of the shell. This battery package has adopted electric core stack body, avoids using battery module structure, and the installation of not only being convenient for can also reduce the cost of battery package, alleviates the weight of battery package. In addition, because the size of the battery core stack body can be flexibly designed according to the actual use requirement, the space utilization rate of the battery pack and the energy density of the battery pack can be greatly improved. The shell comprises a shell body and an upper cover, and the upper cover can cover the opening of the shell body to form an accommodating cavity. The casing includes water-cooling bottom plate and frame, and the frame sets up along water-cooling bottom plate circumference, and water-cooling bottom plate includes at least a set of water-cooling board. The water-cooling plate has a hollow structure, cooling liquid is contained in the hollow structure, the battery cell stacking body can be supported on the corresponding water-cooling plate, so that the battery cell stacking body has an independent water-cooling plate, the cooling efficiency of the battery cell stacking body is improved, and the performance of the battery pack is improved. The frame includes two sets of first roof beams and two sets of second roof beams, two sets of first roof beam intervals and parallel arrangement, and two sets of second roof beams intervals set up, and two sets of second roof beams are mutually perpendicular with two sets of first roof beams, and the both ends of second roof beam link to each other with the tip of two sets of first roof beams respectively. Be provided with the liquid cooling passageway in the first roof beam, the liquid cooling passageway is linked together with the radiator, and the both ends of water-cooling board can butt respectively in two sets of first roof beams, and hollow structure can be linked together with the liquid cooling passageway, and this liquid cooling passageway does not occupy the inner space of battery package, indirect space utilization and the energy density that has promoted the battery package.

The battery pack in the new energy vehicle is convenient to install, light in weight, low in cost, high in space utilization rate and energy density and very convenient to maintain, so that the production cost and the use cost of the new energy vehicle are reduced.

Drawings

Fig. 1 is a schematic view of a battery pack according to an embodiment;

FIG. 2 is a top view of the water cooled floor and the first beam according to the embodiment;

FIG. 3 is a partial cross-sectional view taken at A-A in FIG. 2;

FIG. 4 is a schematic view of a water-cooled floor and a first beam according to an embodiment;

FIG. 5 is a partial enlarged view at B in FIG. 4;

FIG. 6 is an enlarged view of a portion of FIG. 4 at C;

FIG. 7 is a schematic view of a water-cooled panel according to an embodiment;

fig. 8 is a schematic view of a cell stack and an insulating buffer according to an embodiment;

FIG. 9 is a schematic view of a new energy automobile according to an embodiment.

In the figure:

100. a bolt;

1. a housing; 2. a cell stack body; 3. a heat-insulating buffer section;

11. a housing; 12. an upper cover;

111. water-cooling the bottom plate; 112. a frame;

1111. a water-cooling plate; 1121. a first beam; 1122. a second beam;

11111. a water nozzle; 11211. a liquid cooling channel; 11212. a side beam; 11213. a support beam; 11214. an access hole;

112111, a water inlet channel; 112112 and a water outlet channel.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" 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. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, 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. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

An embodiment of the present disclosure provides a new energy vehicle, a battery pack of which includes a casing 1 and at least one set of cell stack 2, as shown in fig. 1. Be provided with the holding chamber in the shell 1, at least a set of electric core stack body 2 is arranged in the holding intracavity along the length direction or the width direction of shell 1. This battery package has adopted electric core stack 2, avoids using battery module structure, and the installation of not only being convenient for can also reduce the cost of battery package, alleviates the weight of battery package. In addition, because the size of the battery cell stack body 2 can be flexibly designed according to the actual use requirement, the space utilization rate of the battery pack and the energy density of the battery pack can be greatly improved.

The housing 1 includes a casing 11 and an upper cover 12, and the upper cover 12 can cover an opening of the casing 11 to form an accommodating chamber. The housing 11 includes a water-cooled bottom plate 111 and a frame 112, and the frame 112 is disposed along the circumference of the water-cooled bottom plate 111. The water-cooled bottom plate 111 includes at least one set of water-cooled plates 1111, and the water-cooled plates 1111 have a hollow structure in which a cooling liquid is contained. The battery stack body 2 can be supported on a corresponding group of water cooling plates 1111 to make the battery stack body 2 have independent water cooling plates 1111, thereby promote the cooling efficiency of the battery stack body 2 and further promote the performance of the battery pack.

The frame 112 includes two sets of first beams 1121 and two sets of second beams 1122, the two sets of first beams 1121 are spaced and arranged in parallel, the two sets of second beams 1122 are spaced and arranged, the two sets of second beams 1122 are perpendicular to the two sets of first beams 1121, and two ends of the second beams 1122 are respectively connected to ends of the two sets of first beams 1121. A liquid cooling channel 11211 is arranged in the first beam 1121, and the liquid cooling channel 11211 is communicated with a radiator. The two ends of the water-cooling plate 1111 can be respectively abutted against the two sets of first beams 1121, the hollow structure can be communicated with the liquid cooling channel 11211, the liquid cooling channel 11211 does not occupy the internal space of the battery pack, and the space utilization rate and the energy density of the battery pack are indirectly improved.

For the installation of the cell stack body 2, the size of the cell stack body 2 should be set in a serialized manner, and the length thereof is usually set at 300 mm to 2500 mm, the width thereof is set at 30 mm to 150 mm, and the height thereof is set at 70 mm to 200 mm.

As shown in fig. 2 and 3, the first beam 1121 is L-shaped, the first beam 1121 includes a side beam 11212 and a support beam 11213, an end portion of the water-cooling plate 1111 is capable of abutting against the side beam 11212, one end of the water-cooling plate 1111 is capable of supporting on the corresponding support beam 11213, and the liquid-cooling passage 11211 is located inside the support beam 11213.

It is conceivable that the liquid cooling passages 11211 in the support beams 11213 of one set of the first beams 1121 may serve as the water inflow passages 112111 of the cooling liquid, and the liquid cooling passages 11211 in the support beams 11213 of the other set of the first beams 1121 may serve as the water outflow passages 112112 of the cooling liquid (see fig. 4 to 6).

As shown in fig. 4-7, two water nozzles 11111 are disposed on the water-cooling plate 1111, and the two water nozzles 11111 are respectively located at two ends of the water-cooling plate 1111. The support beam 11213 is provided with at least one access hole 11214, and the water nozzle 11111 can be inserted into the corresponding access hole 11214 to communicate the hollow structure of the water-cooling plate 1111 with the liquid-cooling passage 11211, thereby facilitating the exchange of the cooling liquid between the hollow structure and the liquid-cooling passage 11211.

It is conceivable that the present embodiment provides a seal between water nozzle 11111 and access hole 11214 in order to prevent the coolant from overflowing between water nozzle 11111 and access hole 11214. Optionally, the seal is a gasket.

In the present embodiment, two water nozzles 11111 are provided at diagonal positions of the water-cooling plate 1111, respectively, in order to allow the coolant to perform sufficient heat exchange in the water-cooling plate 1111.

Preferably, the water-cooled plate 1111 is connected to the support beam 11213 by bolts 100, thereby facilitating the disassembly of the water-cooled plate 1111 and reducing the maintenance cost.

Generally, the cell stack 2 in the battery pack should be provided with a plurality of groups, the plurality of groups of cell stack 2 are often connected by double-sided adhesive tape, and the thickness of the adhesive layer should be greater than or equal to 0.01 mm.

In order to prevent heat conduction between the cell stack bodies 2, the present embodiment is provided with the heat insulating buffer portion 3 (see fig. 8) interposed between the plurality of sets of cell stack bodies 2, thereby performing a heat insulating function and preventing collision between the cell stack bodies 2. Preferably, the heat insulation buffer part 3 is made of a heat insulation buffer material. Alternatively, the heat insulation buffer part 3 is made of foam, and the thickness of the heat insulation buffer part 3 should be controlled between 1 and 20 mm.

The battery pack is convenient to install, light in weight, low in cost, high in space utilization rate and energy density and very convenient to maintain.

Another embodiment of the present disclosure provides a new energy vehicle, which adopts the battery pack of the foregoing embodiment, and uses the housing of the battery pack as a chassis of the new energy (see fig. 9), so as to reduce the vehicle body weight of the new energy vehicle, and also reduce the cost of the new energy vehicle.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The battery pack is characterized by comprising a shell (1) and at least one group of battery cell stacking bodies (2), wherein a containing cavity is arranged in the shell (1), the at least one group of battery cell stacking bodies (2) are arranged in the containing cavity along the length direction or the width direction of the shell (1), the shell (1) comprises a shell (11) and an upper cover (12), and the upper cover (12) can cover an opening of the shell (11) to form the containing cavity;

the casing (11) comprises a water-cooled bottom plate (111) and a frame (112), the frame (112) is arranged along the circumference of the water-cooled bottom plate (111), the water-cooled bottom plate (111) comprises at least one group of water-cooled plates (1111), the water-cooled plates (1111) have a hollow structure, cooling liquid is contained in the hollow structure, and at least one group of the cell stacked bodies (2) can be supported on the corresponding group of the water-cooled plates (1111);

the frame (112) comprises two groups of first beams (1121) and two groups of second beams (1122), the two groups of first beams (1121) are arranged at intervals in parallel, the two groups of second beams (1122) are arranged at intervals, the two groups of second beams (1122) are perpendicular to the two groups of first beams (1121), and two ends of each second beam (1122) are connected with the end parts of the two groups of first beams (1121); a liquid cooling channel (11211) is arranged in the first beam (1121), the liquid cooling channel (11211) is communicated with a radiator, two ends of the water cooling plate (1111) can be respectively abutted against the two groups of first beams (1121), and the hollow structure can be communicated with the liquid cooling channel (11211).

2. The battery pack according to claim 1, wherein the first beam (1121) is L-shaped, the first beam (1121) includes side beams (11212) and support beams (11213), ends of the water-cooling plates (1111) are abuttable against the side beams (11212), one ends of the water-cooling plates (1111) are supportable on the corresponding support beams (11213), and the liquid-cooling channel (11211) is located inside the support beams (11213).

3. The battery pack according to claim 2, wherein two water nozzles (11111) are provided on the water-cooling plate (1111), and the two water nozzles (11111) are respectively located at both ends of the water-cooling plate (1111), and the support beam (11213) is provided with at least one access hole (11214), and the water nozzles (11111) can be inserted into the corresponding access hole (11214).

4. The battery pack according to claim 3, wherein a sealing member is provided between the water nozzle (11111) and the access hole (11214).

5. A battery pack according to claim 3, wherein the two water nozzles (11111) are arranged diagonally.

6. The battery pack according to claim 2, wherein the water-cooling plate (1111) is connected to the support beam (11213) by a bolt (100).

7. The battery pack according to claim 1, characterized by comprising a plurality of groups of the cell stack bodies (2), and a heat insulating buffer portion (3) is interposed between the plurality of groups of the cell stack bodies (2).

8. The battery pack according to claim 7, wherein the heat-insulating buffer portion (3) is made of a heat-insulating buffer material.

9. The battery pack according to claim 1, comprising a plurality of groups of the cell stacks (2), wherein the groups of the cell stacks (2) are bonded together.

10. A new energy vehicle, characterized by comprising the battery pack according to any one of claims 1 to 9.