CN210006795U

CN210006795U - Battery pack and vehicle

Info

Publication number: CN210006795U
Application number: CN201921108856.5U
Authority: CN
Inventors: 曲凡多; 金花; 郑慧苗; 董国宇
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-01-31
Anticipated expiration: 2029-07-15

Abstract

The utility model relates to a power battery technical field provides battery package and vehicle battery package include down the box, go up the box and set up and be in down the box with go up the film between the box, the film with form between the box down and be used for holding the sealed chamber of the electrical unit of battery package the utility model discloses a battery package makes its and form sealed chamber between the box down through setting up the film, from this through the sealing of film to inside avoiding external moisture to get into the battery package box, especially having avoided installation electrical unit position to get into the moisture in the battery package, effectively overcome the risk that produces the condensation in the battery package, prevent that the battery package from taking place the short circuit, strengthened the safety in utilization of battery package.

Description

Battery pack and vehicle

Technical Field

The utility model relates to a power battery technical field, in particular to kinds of battery package and vehicle.

Background

The conventional power battery is designed into a sealed box structure, but because of the influence of breathing effect caused by temperature and environmental change, a breathing valve or an explosion-proof valve is designed on a power battery pack box body to prevent the internal pressure of a battery pack from being too high.

Although this kind of structure of design can be convenient for inside gas outgoing, still can't prevent outside gas or aqueous vapor to pass through, consequently if air humidity is great lead to aqueous vapor to get into the battery package box and after condensing in the box, will produce the condensation, cause power battery package short circuit risk easily.

In addition, for solving above-mentioned problem, some battery box still consider to increase the drier inside and dehumidify, but adopt the drier dehumidification, receive external environment influence moisture constantly, then need real-time supervision drier state and change in good time, its cost is higher.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing kinds of battery package and vehicle to effectively overcome the risk that produces the condensation in the battery package, prevent that the battery package from taking place the short circuit, reinforcing battery package's safety in utilization.

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

the utility model discloses aspect provides kinds of battery package, be in including lower box, last box and setting down the box with go up film between the box, the film with form down between the box and be used for holding the sealed chamber of the electrical unit of battery package.

Optionally, the membrane is flexible so as to be able to deform to accommodate pressure changes within the sealed cavity.

Optionally, the sealed cavity is filled with any of carbon dioxide, nitrogen and argon.

Optionally, the electrical unit comprises a battery module and an electrical element, and the film is attached to the top of the battery module and the top of the electrical element and matched with the shape of the top of the battery module and the top of the electrical element.

Optionally, the film includes a main body portion and a connecting portion disposed around the main body portion, the main body portion is disposed to protrude from the connecting portion, and the connecting portion is connected to the lower box body.

Optionally, the connecting portion is connected with the lower box body through a sealant.

Optionally, a reinforcing unit is arranged on the film, the reinforcing unit is arranged to protrude or recess along the surface of the main body portion, the cross section of the reinforcing unit is rectangular, and wear-resistant materials are arranged on the periphery and corners of the reinforcing unit.

Optionally, a pressure relief valve is arranged on the lower box body.

Optionally, a balance valve is arranged on the upper box body.

A second aspect of the present invention provides types of vehicles, wherein the vehicles include the battery pack according to any of the above aspects.

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

the utility model discloses a battery package makes its and lower box between form sealed chamber through setting up the film, from this through the sealed of film to inside avoiding external moisture to get into battery package box, especially having avoided installation electrical unit position in the battery package to get into the moisture, effectively overcome the risk that produces the condensation in the battery package, prevent that the battery package from taking place the short circuit, strengthened the safety in utilization of battery package.

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

Drawings

The accompanying drawings, which form part of the present invention, are provided to provide an understanding of the present invention with respect to step , the exemplary embodiments of the present invention and their description are intended to explain the present invention without forming an undue limitation on the invention.

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

fig. 2 is a schematic structural diagram of a battery pack according to an embodiment of the present invention.

Description of reference numerals:

1-lower box, 2-upper box, 3-film, 4-battery module, 5-main part, 6-connecting part, 7-reinforcing unit, 8-relief valve, 9-balance valve.

Detailed Description

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

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

With reference to fig. 1 and 2, according to aspects of the present invention, kinds of battery packs are provided, including a lower case 1, an upper case 2, and a film 3 disposed between the lower case 1 and the upper case 2, wherein a sealed cavity for accommodating an electrical unit of the battery pack is formed between the film 3 and the lower case 1.

Therefore, the utility model discloses a battery package is through setting up film 3 at last box 2 under and between box 1, makes film 3 and can form between the box 1 down and be used for holding the sealed chamber of the electrical unit of battery package to inside avoiding external moisture to get into the battery package box, especially avoided the electrical unit part to get into the moisture, effectively overcome the risk that produces the condensation in the battery package, prevent that the battery package from taking place the short circuit, strengthened the safety in utilization of battery package.

And through the utility model discloses the design of well film, effectual prevention water or gaseous piercing through, the production of the inside condensation of battery package has been avoided to very big degree, consequently also corresponding among the prior art installation breather valve, explosion-proof valve's design on the battery package box of having saved, utilize the film to block after the moisture gets into the battery package box, the wet gas problem is controlled in the battery package, has saved the use of drier simultaneously, has prolonged the life of battery package, the cost is reduced.

It should be noted that, because a sealed cavity is formed between the lower box 1 and the film 3, according to the breathing effect of the sealed cavity, the gas in the sealed cavity is not prevented from expanding or contracting, and in view of this problem, in order to ensure the normal use of the battery pack, the film 3 needs to have toughness, so as to be capable of adapting to the pressure change in the sealed cavity through deformation. Specifically, the film may be a plastic film made of, for example, polyethylene, polypropylene, polyvinyl chloride, polystyrene, or other resins, or may be a composite film made of a plurality of materials, for example, a plastic film, a rubber layer, an aluminum foil, a rubber layer, and a plastic insulating layer. When the gas inflation or shrink in the sealed chamber, carry out deformation through film 3 self toughness and absorb, guarantee that the inside gas of battery package box is kept apart with external environment gas completely, prevent the problem of sealed inefficacy.

, in order to control the humidity of the air in the sealed cavity, the sealed cavity can be vacuumized and filled with a proper amount of dry air, oxygen-free air or diluted oxygen, specifically, the sealed cavity is filled with of carbon dioxide, nitrogen and argon, preferably with carbon dioxide, which can isolate oxygen, inhibit abnormal sparks or fire, and it is noted that the gases do not generate condensation at-40 ℃ to 80 ℃, so the step can avoid the risk of condensation.

Certainly, the humidity control mode is not limited to types, and a proper amount of desiccant can be put into the lower case 1 before the film 3 seals the lower case 1, and then the lower case 1 is completely sealed by the film 3, after moisture in the sealing cavity is removed by the desiccant, no external environment gas enters the lower case 1 due to the blocking effect of the film 3, so that new moisture is not generated, and therefore, the drying of the electrical appliance unit in the battery pack is ensured through the mutual cooperation effect of the desiccant and the film 3, and the service life of the battery pack is prolonged.

Generally, the electrical unit includes a battery module 4 and electrical components, and the battery module 4 and the electrical components are common internal structures of a battery pack, and are not described in detail herein. Above-mentioned electrical unit of course need be considered when setting up to film 3, specifically speaking, film 3 laminating sets up battery module 4 with electrical component's top and with battery module 4 with electrical component's top shape looks adaptation to reduce battery package volume as far as possible, occupation space when reducing the battery package and installing in the car.

As implementation modes, the film 3 comprises a main body part 5 and a connecting part 6 arranged around the main body part 5, the main body part 5 is arranged to protrude out of the connecting part 6, the connecting part 6 is connected with the lower box body 1, and the connecting part 6 horizontally extends around by taking the bottom edge of the main body part 5 as a reference so as to be connected with the lower box body 1 conveniently.

In addition, in order to ensure the sealing effect in the sealing cavity, the connecting part 6 is connected with the lower box body 1 through a sealant. Or the sealing can be carried out by adopting any other suitable mode, and the utility model discloses do not limit this.

In order to improve the strength of the film 3, the film 3 is provided with the reinforcing unit 7, the reinforcing unit 7 is arranged to be protruded or recessed along the surface of the main body part 5, and the film 3 with the reinforcing unit 7 can also be formed by hot molding so as to better match the whole installation structure of the battery pack, in the present embodiment, the cross section of the reinforcing unit 7 is rectangular, and the periphery and the corners of the reinforcing unit 7 are provided with wear-resistant materials, specifically, the wear-resistant materials can be arranged by coating or pasting, the wear-resistant treatment needs to be carried out on the wear-resistant part in order to avoid the air-tight failure of the film 3 caused by the excessive wear because the film 3 can be in contact with the electrical units in the lower case 1 during the deformation process, and in other embodiments , the reinforcing unit 7 can be arranged in other shapes, such as a circular cross section, and the like.

It can be understood that, when the internal pressure of the sealed cavity is too high, such as when the electric core in the battery pack explodes or releases the pressure, at this moment, the above problem may not be solved by the film 3 alone, that is, the air pressure cannot be reduced to the normal level completely through the deformation of the film 3, therefore, the pressure release valve 8 is arranged on the lower box body 1, so as to release the pressure through such a one-way pressure release valve structure or pressure explosion opening, thereby ensuring the safe use of the battery pack, and of course, the pressure release valve 8 may be arranged at any position on the lower box body 1. It should be noted that, due to the design of the membrane 3, there is no possibility of external air entering the sealed cavity, and there is only a hidden danger of excessive internal pressure, so the pressure relief valve 8 is usually one-way, which is different from the design of the prior art breather valve or explosion-proof valve.

In addition, in the present embodiment, the upper case 2 not only fulfills the function of mounting the conventional battery pack, but also plays a role of protecting the film 3, and prevents the film 3 from being damaged by external environmental foreign matter piercing, thereby affecting the sealing performance, and at the same time, in order to protect the electrical unit inside the battery pack, as described above, the film 3 itself has toughness and is deformable, thereby not having a function of protecting the electrical unit inside the battery pack from mechanical external force. The design of the upper box body 2 can exactly compensate the problems, but the upper box body 2 does not have higher sealing protection grade, so that the upper box body 2 and the thin film 3 are matched with each other to play a role in safety protection on the battery pack.

Because the upper box body 2 and the film 3 form an incomplete airtight cavity, the upper box body 2 needs an air pressure balance structure to balance the pressure in the cavity, and in order to solve the problem, a balance valve 9 is arranged on the upper box body 2 so as to release redundant air pressure through the balance valve 9 and maintain the balance in the battery pack box body.

It should be noted that, during the installation process of the film 3, the following two ways can be adopted:

, placing a drying agent in the lower box body 1, and directly fixing the connecting part 6 of the film 3 on the lower box body 1 by using a sealant so as to form a sealed cavity between the film 3 and the lower box body 1;

secondly, the film 3 is coated on the inner surface of the upper case 2, the connection part 6 of the film 3 is connected with the upper case 2 in a sealing manner by using a sealant, but a completely airtight cavity is not formed between the upper case 2 and the film 3, and a gas-permeable unit such as a balance valve is provided on the upper case 2. subsequently, the upper case 2 with the film 3 fixed thereon is assembled on the lower case 1 to form a sealed cavity between the film 3 and the lower case 1. the gas expansion or contraction in the sealed cavity is realized by the deformation of the film 3. the upper case 2 and the lower case 1 are mounted at by a conventional bolt connection or structural adhesive connection, which will not be explained in more detail herein.

The utility model discloses a vehicle is owing to adopted above-mentioned battery package, consequently has all advantages of above-mentioned battery package, does not do too much repeated description here the utility model discloses in, the structure of the inside electrical unit of battery package has fully been considered in the design of film 3, sets up to the top shape looks adaptation with electrical unit, consequently on the basis of guaranteeing battery package safe in utilization, can not additionally increase the volume of battery package, has reduced the occupation space of battery package in vehicle inside as far as possible, and the practicality is strong, is convenient for push away and uses.

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

Claims

battery pack, which comprises a lower box body (1), an upper box body (2) and a film (3) arranged between the lower box body (1) and the upper box body (2), wherein a sealed cavity for containing an electric appliance unit of the battery pack is formed between the film (3) and the lower box body (1).
2. A battery pack, as in claim 1, characterized in that the membrane (3) is flexible so as to be able to adapt by deformation to the pressure variations inside the sealed cavity.
3. The battery pack according to claim 1, wherein the sealed cavity is filled with any of carbon dioxide, nitrogen, and argon.
4. The battery pack according to claim 1, wherein the electrical unit comprises a battery module (4) and an electrical element, and the film (3) is fittingly disposed on top of the battery module (4) and the electrical element and is adapted to the shape of the top of the battery module (4) and the electrical element.
5. The battery pack according to claim 1 or 4, wherein the film (3) comprises a main body portion (5) and a connecting portion (6) disposed around the main body portion (5), the main body portion (5) is disposed to protrude from the connecting portion (6), and the connecting portion (6) is connected to the lower case (1).
6. The battery pack according to claim 5, wherein the connecting portion (6) is connected to the lower case (1) by a sealant.
7. The battery pack according to claim 5, wherein the film (3) is provided with a reinforcing element (7), the reinforcing element (7) is arranged to protrude or recess along the surface of the main body part (5), the cross section of the reinforcing element (7) is rectangular, and the periphery and corners of the reinforcing element (7) are provided with wear-resistant materials.
8. The battery pack according to claim 1, wherein a pressure relief valve (8) is provided on the lower case (1).
9. The battery pack according to claim 1, wherein the upper case (2) is provided with a balance valve (9).
A vehicle , characterized in that the vehicle comprises a battery pack according to any of claims 1-9.