CN220963597U - Battery pack box, battery pack and electric equipment - Google Patents

Abstract

The utility model provides a battery pack box body, a battery pack and electric equipment. According to the battery pack box body, the air exhaust cavity is formed by surrounding the bottom guard plate and the lower box body, and the air exhaust hole is formed in the lower box body, so that the battery pack can safely run under various complex working conditions, and the energy density of the battery pack is improved.

Description

Battery pack box, battery pack and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack box body. The utility model also relates to a battery pack provided with the battery pack box body and electric equipment provided with the battery pack.

Background

With the rapid development of the electric vehicle industry, the safety performance and the energy efficiency of the battery pack are receiving more and more attention. Meanwhile, with the development of new technology and new technology, the structural form of the battery pack becomes various. How to improve the overall safety performance and energy efficiency of the battery pack is a problem to be solved in the current technical field.

In the existing battery pack structure, a cooling device usually adopts a liquid cooling or air cooling mode, so that the cooling efficiency is low, and the battery pack is not beneficial to safe operation under various complex working conditions. Meanwhile, in order to improve the safety performance of the battery, the conventional battery pack generally adopts a case structure as a main structure of the battery pack, however, the weight of the structure is large and the energy density is low.

Disclosure of utility model

In view of the foregoing, the present utility model is directed to a battery pack case, which is advantageous in that the battery pack can safely operate under various complicated working conditions and in that the energy density of the battery pack is improved.

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

A battery pack box body comprises a lower box body and a bottom guard plate arranged below the lower box body; the bottom guard plate is arranged at intervals with the lower box body, and an exhaust cavity is formed between the bottom guard plate and the lower box body in a surrounding manner; the lower box body is provided with an exhaust hole communicated with the exhaust cavity, and the bottom guard plate is provided with an exhaust port communicated with the exhaust cavity.

Further, an installation part for installing a pressure relief valve is arranged at the end part of the lower box body, and the pressure relief valve is used for releasing the pressure in the exhaust cavity.

Further, an elastic buffer piece is arranged between the bottom guard plate and the lower box body.

Further, the lower box body is made of magnesium alloy or extruded aluminum.

Compared with the prior art, the utility model has the following advantages:

According to the battery pack box body, the air exhaust cavity is formed by surrounding the bottom guard plate and the lower box body, and the air exhaust hole is formed in the lower box body, so that the battery pack can safely run under various complex working conditions, and the energy density of the battery pack is improved.

In addition, through setting up the relief valve, be favorable to the battery package in time releasing internal pressure in the operation in-process, improve the security performance of battery package. Through setting up elastic buffer between backplate and lower box at the bottom, be favorable to alleviateing impact and the vibration that the battery package received, improve the barrier propterty and the life of battery package. The adoption of the high-strength light material is beneficial to the improvement of the energy density and the operation efficiency of the battery pack.

Another object of the present utility model is to provide a battery pack, wherein the battery pack case is provided with the battery pack case and the battery module is provided in the lower case.

Further, the battery module comprises a battery cell unit and a module bottom plate arranged at the bottom of the battery cell unit; an exhaust channel positioned below the battery cell unit is formed on the module base plate, and the exhaust channel is communicated with the exhaust cavity; the bottom of the battery cell unit is provided with an explosion-proof valve, and the explosion-proof valve stretches into the exhaust channel.

Further, the top and/or the bottom of the battery cell unit is/are provided with a cooling part.

Further, the cooling part comprises a cooling piece with cooling pipelines formed inside, and the cooling pipelines comprise a plurality of sub-pipelines which are crisscrossed vertically and horizontally.

Further, the cooling part is adhered to the battery cell.

According to the battery pack, the battery pack box body is used, so that the battery pack is compact in structure, high in strength and light in weight, and the energy density of the battery pack is improved.

In addition, set up the exhaust passage with exhaust chamber intercommunication on the module bottom plate, be favorable to preventing that the gas that the electricity core produced when thermal runaway can't in time be discharged, improve battery cell's security. Through setting up cooling part, can cool off the electric core effectively, guarantee the normal operating of battery package, prolong the life of battery package.

Furthermore, through setting up a plurality of minutes pipelines that interweave vertically and horizontally, be favorable to improving the cooling efficiency of cooling portion, make the coolant liquid can evenly flow in the battery package to cool off the electric core better. The cooling part is connected with the battery cell unit in an adhesive mode, so that the cooling part is in close contact with the battery cell, and the cooling efficiency is improved. The energy density can be improved, and the service life of electric equipment can be prolonged.

Meanwhile, the utility model also provides electric equipment, and the battery pack is arranged on the electric equipment.

Compared with the prior art, the electric equipment and the battery pack have the same beneficial effects, and are not repeated here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 is an exploded view of a battery pack according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a battery pack case and a module base plate according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a cooling member and a sealing top cover according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a cooling member and a sealing top cover according to another embodiment of the present utility model;

FIG. 5 is a schematic view of a cooling member and a sealing top cover according to a third embodiment of the present utility model;

FIG. 6 is a schematic view of a cooling member and a sealing top cover according to a fourth embodiment of the present utility model;

FIG. 7 is a schematic view of a cooling member and a sealing top cover according to a fifth embodiment of the present utility model;

Reference numerals illustrate:

1. A battery pack case; 11. a lower box body; 111. an exhaust hole; 12. a bottom guard board; 13. an exhaust chamber; 14. an elastic buffer member; 15. a mounting part;

2. A battery module; 21. a cell unit; 22. structural adhesive; 23. a module base plate; 231. an exhaust passage; 3. a heat conducting structural adhesive; 4. a cooling unit; 41. a cooling member; 411. dividing pipelines; 5. sealing the upper cover.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, in the description of the present utility model, the terms "mounted," "connected," and "connected" are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The present embodiment relates to a battery pack case 1, and in its overall structure, as shown in fig. 1 to 7, the battery pack case 1 includes a lower case 11, and a bottom guard plate 12 provided below the lower case 11.

The bottom guard plate 12 is spaced from the lower case 11, and an exhaust chamber 13 is defined therebetween. The lower case 11 is provided with an exhaust hole 111 communicating with the exhaust chamber 13, and the bottom guard plate 12 is provided with an exhaust port communicating with the exhaust chamber 13.

As described above, the battery pack case 1 of the present embodiment is configured to form the exhaust chamber 13 by surrounding between the bottom guard plate 12 and the lower case 11, and the exhaust hole 111 is provided on the lower case 11, which is advantageous in that the battery pack can safely operate under various complicated working conditions, and in that the energy density of the battery pack is advantageously improved.

Based on the above description, specifically, the gas generated by the pressure release of the battery cell in the lower case 11 of the present embodiment enters the exhaust chamber 13 between the lower case 11 and the bottom guard plate 12 through the exhaust hole 111 on the lower case 11, and is then exhausted through the exhaust hole formed on the bottom guard plate 12, where the exhaust hole adopts a structure known to those skilled in the art, for example, a through hole formed on the bottom guard plate 12.

Meanwhile, as shown in fig. 1 to 2, as an exemplary structure, the exhaust hole 111 of the present embodiment is a through hole provided in the bottom plate of the lower case 11. At this time, in the case where the battery pack case 1 accommodates the same number of battery cells, it is advantageous to reduce the weight of the lower case 11, thereby improving the energy density of the battery pack.

As a preferred embodiment, as shown in fig. 1 to 2, the end of the lower case 11 of the present embodiment is provided with a mounting portion 15 for mounting a relief valve for releasing the pressure in the exhaust chamber 13. At this time, through setting up the relief valve, be favorable to the battery package in time releasing internal pressure in the operation in-process, improve the security performance of battery package.

In detail, the mounting portion 15 is provided on an edge beam at one end of the lower case 11, and when the embodiment is implemented, the mounting portion 15 adopts a related structure known to those skilled in the art, such as a mounting hole. Besides being mounted on the side beams at one end of the lower case 11, the mounting portions 15 may be disposed on a plurality of side beams, and the corresponding mounting portions 15 may be provided with pressure release valves to improve the reliability of the pressure release of the battery pack.

In this embodiment, as a preferred embodiment, as shown in fig. 1, an elastic buffer 14 is provided between the bottom guard plate 12 and the lower case 11. In this way, the elastic buffer member 14 is arranged between the bottom guard plate 12 and the lower box 11, so that the impact and vibration of the battery pack can be reduced, and the protection performance and the service life of the battery pack can be improved.

In particular, the elastic cushion 14 of the present embodiment adopts a cushion material or structure known to those skilled in the art, such as MPP (Microcellular Polypropylene foam, propylene cellular foam) and PP (Polypropylene) sandwich, so that the elastic cushion 14 has better elastic energy absorption and cushion performance.

At this time, when the bottom guard plate 12 receives an external impact force, the elastic buffer 14 between the bottom guard plate 12 and the lower case 11 can effectively absorb the impact, and protect the explosion-proof valve inside the battery. At the same time, the elastic buffer 14 is connected to the bottom guard 12 and the lower case 11 by, for example, bonding, so that it is firmly connected.

As a preferred embodiment, the lower case 11 of the present embodiment is made of magnesium alloy or extruded aluminum material. At this time, the high-strength light material is adopted, which is beneficial to improving the energy density and the operation efficiency of the battery pack. In practice, instead of using aluminum magnesium alloy or extruded aluminum, the lower housing 11 may be made of other lightweight materials known to those skilled in the art, such as high strength composite materials.

Meanwhile, in order to enhance the structural strength of the battery pack case 1, the bottom cover 12 is made of a material having a high strength, such as HC340/590DP high-strength steel or heat-formed steel. At this time, the battery pack case 1 has multiple protections including the bottom guard plate 12 and the elastic buffer 14, so that the battery pack case 1 has high safety.

The battery pack case 1 of the present embodiment can facilitate gas discharge at the time of thermal runaway of the battery cells by forming the gas discharge chamber 13 by enclosing between the bottom guard plate 12 and the lower case 11 and providing the gas discharge hole 111 on the lower case 11. Meanwhile, through the structural design of the bottom guard plate 12 and the elastic buffer piece 14, multiple protection is provided for the battery cells in the battery pack box body 1, and the battery pack can safely run under various complex working conditions. In addition, the light materials and the through holes arranged on the lower box 11 are beneficial to reducing the weight of the battery pack box 1 and improving the energy density of the battery pack.

Example two

The present embodiment relates to a battery pack, which is provided with a battery pack case 1 in the first embodiment and a battery module 2 provided in a lower case 11, as shown in fig. 1 to 7, in an overall structure. The structure not described in the battery pack can be referred to the existing structure.

The arrangement makes the battery pack compact in structure, high in strength and light in weight, and is beneficial to improving the energy density of the battery pack.

As a preferred embodiment, as shown in fig. 1, the battery module 2 of the present embodiment includes a battery cell unit 21, and a module bottom plate 23 provided at the bottom of the battery cell unit 21. Wherein, an exhaust passage 231 is formed on the module bottom plate 23 below the battery cell unit 21, and the exhaust passage 231 communicates with the exhaust chamber 13. In addition, the bottom of the cell unit 21 is provided with an explosion-proof valve which extends into the exhaust passage 231.

At this time, the exhaust channel 231 communicated with the exhaust cavity 13 is arranged on the module bottom plate 23, which is favorable for preventing gas generated by the battery cell during thermal runaway from being unable to be discharged in time, and improving the safety of the battery cell. In particular, the module bottom plate 23 adopts a U-shaped structure, and the cell unit 21 is disposed on the module bottom plate 23 with the U-shaped structure in a manner of being bonded by, for example, a structural adhesive 22, so that an exhaust channel 231 is formed between the cell unit 21 and the module bottom plate 23.

In detail, the cell unit 21 adopts a design with an upward pole or a downward side, and the explosion-proof valve at the bottom of the cell unit 21 on the module bottom plate 23 is located in the exhaust channel 231, so that the pressure release and the exhaust of the cell unit 21 can be facilitated.

Meanwhile, the exhaust passage 231 of the present embodiment communicates with the exhaust chamber 13 by a structure well known to those skilled in the art, for example, a hole corresponding to the exhaust hole 111 of the lower case 11 is provided in the module base plate 23, or an end of the module base plate 23 using a U-shaped structure communicates with the lower case 11.

It can be appreciated that the bottom guard plate 12 and the elastic buffer member 14 arranged on the battery pack case 1 are combined by adopting the module bottom plate 23 with the U-shaped structure, so that the battery cell unit 21 has multiple safety structure protection, which is beneficial to improving the safety of the battery pack.

In this embodiment, as a preferred embodiment, as shown in fig. 1, 3 to 7, the cooling part 4 is provided at the top of the cell unit 21, and the cooling part 4 may be provided at the bottom of the cell unit 21, or the cooling parts 4 may be provided at both the top and the bottom of the cell unit 21.

Therefore, through the arrangement of the cooling part 4, the battery core can be effectively cooled, the normal operation of the battery pack is ensured, and the service life of the battery pack is prolonged. In specific implementation, the cooling part 4 is adhered to the battery cell unit 21 through the heat conduction structural adhesive 3, so that the cooling part 4 is tightly combined with the battery cell unit 21, and the cooling effect of the battery cell unit 21 is improved.

Meanwhile, the battery pack further comprises a sealing upper cover 5 matched with the lower box 11 to seal the battery cells in the battery pack, and the liquid cooling plates are connected with the lower box 11 and the sealing upper cover 5 in a screwed mode to ensure that the battery pack has a good sealing effect.

As a preferred embodiment, as shown in fig. 1, 3 to 7, the cooling portion 4 of the present embodiment includes a cooling member 41 having cooling pipes formed therein, and the cooling pipes include a plurality of sub-pipes 411 which are crisscrossed vertically and horizontally. At this time, by providing the plurality of branch pipes 411 which are vertically and horizontally interleaved, the cooling efficiency of the cooling unit 4 is advantageously improved, and the coolant can uniformly flow in the battery pack to cool the battery cell 21 more preferably.

In particular, the cooling pipes may be arranged in a manner known to those skilled in the art, such as a chevron pipe as shown in fig. 3, a groined pipe as shown in fig. 4, a return pipe as shown in fig. 5, a U-shaped pipe as shown in fig. 6, or a liquid cooling plate as shown in fig. 7. For different forms of cooling pipelines, the cooling pipelines can be adaptively selected according to actual design requirements.

In detail, the pipeline in the shape of Chinese character 'tian' shown in fig. 3 has large cooling area and is suitable for high-power working conditions. The groined-shaped pipeline and the return-shaped pipeline shown in fig. 4 to 5 are suitable for medium-power cooling environments. The U-shaped piping as shown in fig. 6 is suitable for low power cooling requirements. The liquid cooling plate shown in fig. 7 is suitable for the omnidirectional cooling of the large surface of the cell unit 21.

Meanwhile, in the field-shaped pipeline, the well-shaped pipeline, the return-shaped pipeline and the U-shaped pipeline as shown in fig. 2 to 6, a plurality of branch pipelines 411 which are vertically and horizontally interwoven are arranged in the cooling pipeline, and a plurality of gaps are formed between the branch pipelines 411, so that the weight of the cooling piece 41 can be reduced, and the energy density of the battery pack can be improved.

In this embodiment, as a preferred embodiment, the cooling unit 4 is bonded to the cell unit 21 as shown in fig. 1. So set up, cooling part 4 and electric core unit 21 bonding link to each other is favorable to making cooling part 4 and electric core in close contact, improves cooling efficiency.

The battery pack of the embodiment can facilitate the compact structure, high strength and light weight of the battery pack and facilitate the improvement of the energy density of the battery pack by applying the battery pack case 1 of the first embodiment.

Example III

The embodiment relates to electric equipment, and a battery pack in the second embodiment is arranged on the electric equipment.

The electric equipment can also be beneficial to improving the endurance time of the electric equipment by adopting the battery pack.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A battery pack case, characterized in that:

comprises a lower box body and a bottom guard plate arranged below the lower box body;

The bottom guard plate is arranged at intervals with the lower box body, and an exhaust cavity is formed between the bottom guard plate and the lower box body in a surrounding manner;

The lower box body is provided with an exhaust hole communicated with the exhaust cavity, and the bottom guard plate is provided with an exhaust port communicated with the exhaust cavity.

2. The battery pack case according to claim 1, wherein:

The end part of the lower box body is provided with a mounting part for mounting a pressure relief valve, and the pressure relief valve is used for releasing the pressure in the exhaust cavity.

3. The battery pack case according to claim 1, wherein:

an elastic buffer piece is arranged between the bottom guard plate and the lower box body.

4. A battery pack case according to any one of claims 1 to 3, wherein:

the lower box body is made of magnesium alloy or extruded aluminum.

5. A battery pack, characterized in that:

Comprising the battery pack case according to any one of claims 1 to 4, and a battery module provided in the lower case.

6. The battery pack according to claim 5, wherein:

The battery module comprises a battery cell unit and a module bottom plate arranged at the bottom of the battery cell unit;

An exhaust channel positioned below the battery cell unit is formed on the module base plate, and the exhaust channel is communicated with the exhaust cavity;

the bottom of the battery cell unit is provided with an explosion-proof valve, and the explosion-proof valve stretches into the exhaust channel.

7. The battery pack according to claim 6, wherein:

And the top and/or the bottom of the battery cell unit is/are provided with a cooling part.

8. The battery pack according to claim 7, wherein:

The cooling part comprises a cooling piece with cooling pipelines formed inside, and the cooling pipelines comprise a plurality of branch pipelines which are crisscrossed vertically and horizontally.

9. The battery pack according to claim 7, wherein:

the cooling part is adhered to the battery cell unit.

10. An electrical consumer, characterized in that:

the powered device comprising the battery pack of any one of claims 5 to 9.