CN212209633U

CN212209633U - Battery module

Info

Publication number: CN212209633U
Application number: CN202021043032.7U
Authority: CN
Inventors: 曹勇; 杜肖源; 程克强; 常利辉
Original assignee: China Aviation Lithium Battery Co Ltd; China Aviation Lithium Battery Research Institute Co Ltd
Current assignee: Avic Innovation Technology Research Institute Jiangsu Co ltd; China Aviation Lithium Battery Co Ltd; China Lithium Battery Technology Co Ltd; CALB Technology Co Ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2020-12-22
Anticipated expiration: 2030-06-08

Abstract

The utility model relates to the field of batteries, and discloses a battery module, a battery assembly formed by a plurality of batteries, wherein the batteries in the battery assembly are provided with an explosion-proof valve; the heat insulation device is positioned on one side of the explosion-proof valve, which is far away from the battery; the battery pack that is formed by a plurality of battery, the battery pack that is formed by a plurality of battery to be equipped with the explosion-proof valve on every battery in the battery pack, thereby effectively protect when the battery intensifies, the inside gas expansion of battery, the increase of pressure in the battery, explosion-proof valve gassing pressure release when reaching certain degree, thereby avoid the battery explosion. Meanwhile, the heat insulation device is arranged at the position corresponding to the explosion-proof valve of the battery, so that the explosion-proof valve of the adjacent battery can be effectively prevented from being melted through by eruption of the battery with thermal runaway, and further thermal diffusion is avoided.

Description

Battery module

Technical Field

The utility model relates to a battery technology field, in particular to battery module.

Background

With the popularization and spread of batteries, the safety of the batteries is increasingly becoming a focus of attention of consumers. In the battery, particularly in a high-temperature environment, the activity of the electrolyte component of the battery is greatly enhanced, and gas is generated along with the increase of the temperature, so that the gas pressure of the battery is increased, and even explosion is caused in severe cases.

At present, when the temperature of the battery rises, gas inside the battery expands, the internal pressure of the battery increases, the temperature in the battery rises quickly to a certain degree, and when the pressure value rises rapidly, the battery still cannot be deflated and decompressed immediately, so that the battery explodes.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a battery module for improve battery pack's security.

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

a battery module, comprising:

the battery pack is formed by a plurality of batteries, and the batteries in the battery pack are provided with explosion-proof valves;

the heat insulation device is positioned on one side of the explosion-proof valve, which is far away from the battery.

The utility model provides a battery module has following effect at least: the battery pack formed by a plurality of batteries is provided with an explosion-proof valve on each battery in the battery pack, so that the temperature of the batteries is effectively raised, the gas inside the batteries expands, the internal pressure of the batteries increases, and the explosion-proof valve is deflated and decompressed when the certain degree is reached, so that the explosion of the batteries is avoided. Meanwhile, the heat insulation device is arranged at the position corresponding to the explosion-proof valve of the battery, so that the explosion-proof valve of the adjacent battery can be effectively prevented from being melted through by eruption of the battery with thermal runaway, and further thermal diffusion is avoided.

Drawings

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

fig. 2 is a schematic view of a wiring harness board assembly in a battery module according to an embodiment of the present invention;

fig. 3 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 4 is an exploded view of an end plate assembly in a battery module according to an embodiment of the present invention.

Icon: 100-a battery assembly; 110-a battery; 200-an explosion-proof valve; 300-a wiring harness panel assembly; 310-a through hole; 400-an end plate assembly; 410-a connector; 420-an electrode holder; 421-positive output electrode; 422-negative output electrode; 423-support surface; 424-stiffener; 425-fastening; 430-a protective cover; 431-open cell structure; 440-a containment chamber; 500-a busbar assembly; 510-a positive electrode; 520-negative electrode; 600-side plates; 700-cover plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the embodiment of the present invention provides a battery module, including:

a plurality of batteries 110 form a battery assembly 100, and the batteries 110 in the battery assembly 100 are provided with an explosion-proof valve 200;

and the heat insulation device is positioned on one side of the explosion-proof valve 200, which is far away from the battery 110.

It should be noted that, the battery assembly 100 is formed by a plurality of batteries 110, and each battery 110 in the battery assembly 100 is provided with the explosion-proof valve 200, so as to effectively protect the battery 110 from explosion when the temperature of the battery rises, the gas inside the battery 110 expands, the internal pressure of the battery 110 increases, and the explosion-proof valve 200 is deflated and depressurized when reaching a certain degree. Meanwhile, the heat insulation device is arranged at the position corresponding to the battery explosion-proof valve 200, so that the situation that eruptions of the battery with thermal runaway penetrate through the explosion-proof valves 200 of the adjacent batteries can be effectively prevented, and further thermal diffusion is avoided.

Optionally, as shown in fig. 2, the method further includes: the wire harness assembly 300, the wire harness assembly 300 is disposed at one side of the battery, and the heat insulation device is disposed on the wire harness assembly 300.

As an example, the heat insulation device is disposed on the wire harness board assembly 300, so that heat diffusion of the battery towards the wire harness board assembly 300 can be effectively suppressed, and heat diffusion can be avoided.

Optionally, a heat insulation means is attached to the side of the wire harness plate assembly 300 facing the explosion proof valve 200.

As an example, the thermal insulation device is adhered to the wiring harness board assembly 300, so that the thermal insulation device can be fixed, and the thermal runaway battery can be effectively prevented from erupting and melting through the explosion-proof valve of the adjacent battery, thereby avoiding thermal diffusion.

Optionally, the wire harness board assembly 300 is provided with a through hole 310 along the thickness direction thereof, and the through hole 310 corresponds to the explosion-proof valve position.

As an example, for the purpose of thermal runaway suppression, the harness board assembly 300 is provided with corresponding through holes 310 at positions corresponding to the battery explosion-proof valves 200, the through holes 310 are provided for thermal runaway diversion, the shape of the through holes may be oblong or circular, the shape is not limited herein, the number of the through holes 310 corresponds to the number of batteries, the positions of the through holes 310 are distributed above the battery explosion-proof valves 200 for thermal runaway diversion, so as to avoid heat accumulation, and at the same time, heat insulation devices are attached to the positions of the through holes 310 at the back of the harness board corresponding to the battery explosion-proof valves 200, the through holes 310 form channels for spraying when the batteries are thermally runaway, but the through holes 310 may cause spray of the battery to directly enter the explosion-proof valves 200 of adjacent or separated batteries, so as to cause the battery explosion-proof valves 200 to burn through to the thermal runaway.

Optionally, the thermal insulation means is a mica sheet.

As an example, the thickness of the mica sheet is 0.2mm, the material can resist the temperature of more than 1000 ℃, and can effectively prevent eruption of a thermal runaway battery from melting through the explosion-proof valve 200 of an adjacent battery, so that heat diffusion is caused; in addition, the heat insulation device is multi-layer mica paper or aerogel, but not limited to this.

Optionally, as shown in fig. 3, the method further includes: an end plate assembly 400, the end plate assembly 400 being located at an end in the arrangement direction of the cells in the cell assembly 100;

the bus bar assembly 500, the bus bar assembly 500 is electrically connected with the batteries in the battery assembly 100, the bus bar assembly 500 is located on the top of the battery assembly 100, a cover plate 700 is arranged on the top of the bus bar assembly 500, and the positive and negative electrodes of the bus bar assembly 500 are arranged on the same side as the connector 410 in the end plate assembly 400.

As an example, the positive and negative electrodes of the bus bar assembly 500 are disposed on the same side as the connector 410 in the end plate assembly 400, thereby facilitating wiring.

Optionally, the end plate assembly 400 comprises: an electrode holder 420 and a connector 410 on the electrode holder 420;

the electrode holder 420 has a positive output electrode 421 and a negative output electrode 422, the positive output electrode 421 being connected to the positive electrode 510 of the bus bar assembly 500, and the negative output electrode 422 being connected to the negative electrode 520 of the bus bar assembly 500.

As an example, the electrode holder 420 has a positive output electrode 421 and a negative output electrode 422, the positive output electrode 421 is connected with the positive electrode 510 of the busbar assembly 500, the negative output electrode 422 is connected with the negative electrode 520 of the busbar assembly 500, and the positive electrode 510 and the negative electrode 520 of the high-voltage busbar assembly 500 are disposed on the same side as the low-voltage connector 410, so that the high voltage and the low voltage are not limited to be disposed on different sides, thereby improving the diversity of the battery module usage and the system configuration provided by the embodiment of the present invention.

Optionally, the end plate assembly 400 further comprises: and a protective cover 430, wherein the protective cover 430 is arranged on the electrode bracket 420, and forms a containing cavity for containing the connector 410 with the electrode bracket 420.

As an example, as shown in fig. 4, the end plate assembly 400 is composed of a protective cover 430 and an electrode holder 420, the protective cover 430 and the electrode holder 420 form a receiving cavity 440 for receiving the connector 410, wherein the connector 410 can be placed at a position of the receiving cavity 440 corresponding to the electrode holder 420.

As an example, a side plate 600 is provided at the other two sides of the battery module 100 except for the end plate assembly 400.

As an example, the positive output electrode 421 is placed above the supporting surface 423 of the electrode holder 420, the two planes are in free contact, the negative output electrode 422 is placed above the supporting surface 423 of the electrode holder 420, the two planes are in free contact, the assembly can realize the module-side output and isolated fixation of the negative output electrode 422 of the positive output electrode 421, the connector 410 is connected to the reinforcing plate 424 by gluing or welding, the back surface of the reinforcing plate 424 is in free contact with the surface of the electrode holder 420, the side surface of the reinforcing plate 424 is matched with the surface of the electrode holder 420 to realize the position limitation of the connector 410, the front surface of the connector 410 is in free contact with the surface of the protective cover 430, the protective cover 430 has an opening structure 431 which can be matched and fixed with the buckle 425 of the electrode holder 420, meanwhile, the protective cover 430 has a guide groove to facilitate the sliding of the buckle 425 of the protective cover 430 into the inner part, similarly, the protective cover 430 has the, the connector 410 is mounted in the cavity of the electrode holder 420 and is fixed in a limited manner in each direction, together with the clip 425, to limit the position of the protective cover 430.

It will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A battery module, comprising:

2. The battery module according to claim 1, further comprising:

a harness board assembly disposed at one side of the battery;

the heat insulation device is arranged on the wire harness board assembly.

3. The battery module according to claim 2, wherein the heat insulating device is attached to a side of the wire harness plate assembly facing the explosion-proof valve.

4. The battery module according to claim 2, wherein the harness board assembly is provided with a through hole along a thickness direction thereof, and the through hole corresponds to the position of the explosion-proof valve.

5. The battery module according to claim 1, wherein the thermal insulation means is a mica sheet.

6. The battery module according to claim 1, wherein the thermal insulation means is a multi-layered mica paper.

7. The battery module according to claim 1, wherein the thermal insulation means is aerogel.

8. The battery module according to claim 1, further comprising:

the end plate assembly is positioned in the battery module and is arranged at the end part along the arrangement direction of the batteries;

the bus bar assembly is electrically connected with the batteries in the battery assembly, and the positive electrode and the negative electrode of the bus bar assembly are arranged on the same side of the connector in the end plate assembly.

9. The battery module according to claim 8, wherein the end plate assembly comprises:

an electrode holder and the connector on the electrode holder;

the electrode support is provided with a positive output electrode and a negative output electrode, the positive output electrode is connected with the positive pole of the bus bar assembly, and the negative output electrode is connected with the negative pole of the bus bar assembly.

10. The battery module of claim 9, wherein the end plate assembly further comprises: and the protective cover is arranged on the electrode support and forms an accommodating cavity for accommodating the connector with the electrode support.