CN212033177U

CN212033177U - Battery pack

Info

Publication number: CN212033177U
Application number: CN202020819217.6U
Authority: CN
Inventors: 王建伟; 冯帅; 赵亮
Original assignee: Kunshan Bao Innovative Energy Technology Co Ltd
Current assignee: Kunshan Bao Innovative Energy Technology Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-11-27
Anticipated expiration: 2030-05-15

Abstract

The utility model discloses a battery pack, which comprises an upper box cover, a lower box body and a sensor, wherein the lower box body is in adaptive sealing connection with the upper box cover; the sensor is annular, and is arranged on the inner side surface of the lower box body in a manner of being matched with the inner side surface of the lower box body in the circumferential direction of the lower box body, or/and is arranged at the joint between the lower box body and the upper box cover and is positioned at the inner side end of the sealed joint; the sensor is used for detecting water seepage in the battery pack and sending out water seepage alarm information to the battery management system, and water seepage alarm is released to a user through the battery management system. The utility model provides a battery pack, the gas tightness detects that the precision is high, sensitivity is good, reliability and security are strong.

Description

Battery pack

Technical Field

The utility model belongs to the technical field of the battery package sealing technique and specifically relates to a battery package is related to.

Background

In the field of power batteries of current passenger vehicles, air tightness becomes one of huge hidden dangers influencing the safety of a battery pack, and after the air tightness of the battery pack fails, water seepage, rainwater splashing and the like can cause water inflow of the battery pack, so that safety accidents are caused. Among them, since the contact surface between the upper cover and the lower case of the battery pack is the largest, sealing is the most difficult, and the occurrence of the airtightness failure is the most frequent place.

At present, in order to realize the sealing of a box body and a box cover, a sealing gasket and a gluing process are mainly adopted for sealing in the industry, wherein various sealing materials can be selected, but no matter which process and material are adopted, the following problems can not be solved: a user cannot know the air tightness state of the current battery pack, and most battery packs are subjected to air tightness full inspection when leaving a factory so as to ensure that the air tightness when leaving the factory meets IP67 or IP68, but after the battery pack is loaded, the battery pack meets various complex working conditions in the using process, the air tightness of the battery pack is difficult to be ensured to be always kept above IP67 during the service life, meanwhile, whether the air tightness of the battery pack is invalid or not can not be judged, and the air tightness invalid state can not be transmitted to a client through a BMS; the water seepage battery pack is continuously used, when the air tightness of the battery pack is invalid, water seepage is inevitable in the battery pack in rainy days, and a user can be continuously used without knowing because the user cannot obtain a prompt about the water seepage of the battery pack, so that the battery pack can be finally subjected to short circuit and fire accidents; the sensitivity and reliability of detecting water seepage by using the rope-shaped sensor are poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a battery pack, the gas tightness detects precision height, sensitivity, reliability and security are strong.

According to the utility model discloses a battery pack, include

An upper box cover;

the lower box body is adaptively and hermetically connected with the upper box cover;

the sensor is in a ring shape and is installed on the inner side face of the lower box body in a fitting mode in the circumferential direction of the lower box body, or/and the sensor is installed at a seam between the lower box body and the upper box cover and is located at the inner side end of the sealed connection position; the sensor is used for detecting the water seepage in the battery pack and sending out water seepage alarm information to the battery management system, and the water seepage alarm is released to a user through the battery management system.

According to the utility model discloses the battery package, go up case lid and lower box adaptation ground seal installation, install the sensor through the medial surface adaptation ground of box under on the circumferencial direction of box under with, or/and the seam crossing between box and last case lid under and be located sealing connection's medial extremity installation sensor, make the sensor can detect fast accurately when the battery package infiltration, the water droplet is by the seam crossing infiltration between box and the last case lid down, flow down along the box internal side down, the sensor detects the interior infiltration of battery package and sends infiltration alarm information and give battery management system, release the infiltration warning to the user through battery management system, the continuous use of infiltration battery package has been avoided, increase the security of battery package.

According to the utility model discloses an embodiment, the medial surface of lower box is formed with the first annular groove of opening up on the circumferential direction, the sensor is installed with adaptation in the first annular groove.

According to the utility model discloses further embodiment, the medial surface of box includes first perpendicular anchor ring, second perpendicular anchor ring and connects the anchor ring down, the second is erected the anchor ring and is lain in apart the inboard of first perpendicular anchor ring, connect the anchor ring the peripherally with the lower periphery of first perpendicular anchor ring is connected, connect the anchor ring the interior periphery with the lower periphery of second perpendicular anchor ring is connected, so that first perpendicular anchor ring the second erect the anchor ring with it forms jointly to connect the anchor ring first annular groove.

According to the utility model discloses still further embodiment, the go-between is personally submitted the level setting.

According to the utility model discloses further embodiment, first annular groove close on in lower box with go up between the case lid sealing connection department.

According to the utility model discloses a further embodiment, the medial surface of box is formed with the opening level in the circumferential direction and inwards incline the ascending second annular groove of side direction or opening slant, the sensor is installed with adaptation in the second annular groove.

According to some embodiments of the invention, the sensor is a sheet sensor, the sensor comprises two layers of metal sheets and an insulating layer located between the metal sheets.

According to some embodiments of the invention, the sensor is a linear sensor.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a battery pack according to an embodiment of the present invention.

Fig. 2 is the assembly schematic diagram of the upper cover, the lower box body, the first annular groove and the sensor of the battery pack of the embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a first annular groove on a lower case of a battery pack according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a sheet sensor of a battery pack according to an embodiment of the present invention.

Reference numerals:

battery pack 1000

Sensor 3 of upper box cover 1 and lower box body 2

First annular groove 4

First vertical ring surface 41 and second vertical ring surface 42 connect ring surface 43

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

A battery pack 1000 according to an embodiment of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1 to 2, a battery pack 1000 according to an embodiment of the present invention includes an upper case cover 1, a lower case body 2, and a sensor 3; the lower box body 2 is in adaptive sealing connection with the upper box cover 1; the sensor 3 is annular, the sensor 3 is installed in the circumferential direction of the lower box body 2 in a manner of being matched with the inner side surface of the lower box body 2, or/and the sensor 3 is installed at the seam between the lower box body 2 and the upper box cover 1 and is positioned at the inner side end (not shown in the figure) of the sealed connection part; the sensor 3 is used for detecting water seepage in the battery pack 1000 and sending out water seepage alarm information to the battery management system, and water seepage alarm is released to a user through the battery management system.

Specifically, the lower case 2 is fittingly and sealingly connected to the upper case cover 1, for example, the upper case cover 1 and the lower case 2 are fittingly and sealingly mounted by a sealing ring 5 or by gluing, so as to ensure the airtightness of the battery pack 1000.

The sensor 3 is annular, the sensor 3 is installed on the inner side surface of the lower box body 2 in a manner of being matched with the inner side surface of the lower box body 2 in the circumferential direction of the lower box body 2, or/and the sensor 3 is installed at the joint between the lower box body 2 and the upper box cover 1 and is positioned at the inner side end of the sealed joint; the sensor 3 is used for detecting water seepage in the battery pack 1000 and sending out water seepage alarm information to the battery management system, and water seepage alarm is released to a user through the battery management system. It can be understood that the sensor 3 is annular, so that any water seepage at any one position of a circle of a circumferential joint between the upper box cover 1 and the lower box body 2 can be detected, and the detection result is reliable; there are several cases when the sensor 3 is provided: the method comprises the following steps that firstly, a sensor 3 is arranged on the circumferential direction of a lower box body 2 in a manner of being matched with the inner side surface of the lower box body 2, when the battery pack 1000 seeps water, water drops flow down along the inner side surface of the lower box body 2, the sensor 3 arranged on the circumferential direction of the inner side surface of the lower box body 2 detects the seepage water in the battery pack 1000 and sends seepage alarm information to a battery management system, and seepage alarm is released to a user through the battery management system; secondly, the sensor 3 is arranged at the joint between the lower box body 2 and the upper box cover 1 and is positioned at the inner side end of the sealed joint, when the battery pack 1000 seeps water, water drops seep from the joint between the lower box body 2 and the upper box cover 1, the sensor 3 arranged at the inner side end of the sealed joint between the lower box body 2 and the upper box cover 1 detects the seepage water in the battery pack 1000 and sends out seepage water alarm information to the battery management system, and the seepage water alarm is released to a user through the battery management system; third, a sensor 3 is installed in the circumferencial direction of box 2 medial surface down, and the seam department of another sensor 3 installation between box 2 and the upper box cover 1 down and be located the medial extremity of sealing connection department, and two sensors 3 mutually support to make when detecting whether seep water in the battery package 1000, measuring result is more accurate reliable.

According to the utility model discloses battery package 1000, go up 1 and 2 adaptation ground seal installations of lower box of case lid, install sensor 3 through the ring circumferencial direction of box 2 under with the medial surface adaptation of box 2 down, or/and the seam crossing between box 2 and last box lid 1 under and be located sealing connection's medial extremity installation sensor 3, make sensor 3 can detect fast accurately when battery package 1000 infiltration, the water droplet is by the infiltration of seam crossing between lower box 2 and the last box lid 1, flow down along box 2 medial surface down, sensor 3 detects the interior infiltration of battery package 1000 and sends infiltration alarm information and give battery management system, release the infiltration alarm to the user through battery management system, the continuous use of battery package 1000 has been avoided seeping water, increase battery package 1000's security.

As shown in fig. 2, according to an embodiment of the present invention, the inner side surface of the lower case 2 is formed with a first annular groove 4 with an upward opening in the circumferential direction, and the sensor 3 is fittingly installed in the first annular groove 4. It can be understood that, when the battery pack 1000 is seeped, water drops seep through the seam between the lower case 2 and the upper case cover 1 and flow down along the inner side of the lower case 2, because the first annular groove opens upwards, the water drops can flow into and collect in the first annular groove, so that the sensor 3 mounted in the first annular groove 4 can detect the water seepage of the battery pack 1000 and send a water seepage alarm message to the battery management system.

As shown in fig. 3, according to a further embodiment of the present invention, the inner side surface of the lower case 2 includes a first vertical ring surface 41, a second vertical ring surface 42 and a connection ring surface 43, the second vertical ring surface 42 is spaced apart from the inner side of the first vertical ring surface 41, the outer periphery of the connection ring surface 43 is connected to the lower periphery of the first vertical ring surface 41, and the inner periphery of the connection ring surface 43 is connected to the lower periphery of the second vertical ring surface 42, so that the first vertical ring surface 41, the second vertical ring surface 42 and the connection ring surface 43 together form the first annular groove 4. It can be understood that when the battery pack 1000 leaks water, water drops seep through the seam between the lower case 2 and the upper case cover 1, flow along the first vertical ring surface 41 to the connecting ring surface 43, and are collected in the first annular groove formed by the first vertical ring surface 41, the second vertical ring surface 42 and the connecting ring surface 43 together, so that the sensor 3 mounted in the first annular groove 4 can detect the water leakage of the battery pack 1000 and send a water leakage alarm message to the battery management system.

According to the utility model discloses still further embodiment, connect anchor ring 43 and be the level setting, from this, placing that sensor 3 can be stable on connecting anchor ring 43 avoids the crooked measuring result that influences of sensor 3.

According to the utility model discloses further embodiment, first annular groove 4 is close to in the sealing connection department between lower box 2 and upper box cover 1. It can be understood that the first annular groove is close to the sealing connection between the lower case 2 and the upper case cover 1, and thus the sensor 3 installed in the first annular groove can rapidly and accurately detect whether the battery pack 1000 is permeated with water, thereby improving safety.

According to another embodiment of the present invention, the inner side surface of the lower box 2 is formed with a second annular groove with an opening level facing inward or obliquely upward, and the sensor 3 is fittingly installed in the second annular groove (not shown in the figure). It can be understood that, when the battery pack 1000 seeps water, water drops seep through the joint between the lower case 2 and the upper case cover 1 and flow down along the inner side of the lower case 2, because the opening of the second annular groove is horizontal inward or the opening is inclined upward, the water drops can flow into the second annular groove wall and collect in the second annular groove, so that the sensor 3 mounted in the second annular groove can detect the water seepage of the battery pack 1000 and send out a water seepage alarm message to the battery management system.

As shown in fig. 4, according to some embodiments of the present invention, the sensor 3 is a sheet sensor 3, and the sensor 3 includes two layers of metal sheets 31 and an insulating layer 32 located between the metal sheets 31 on both sides. It can be understood that the sheet sensor 3 has high sensitivity and accurate detection result; the sheet sensor 3 has a three-layer structure, the upper layer and the lower layer are metal sheets 31, the middle layer is an insulating material, one layer of metal sheet 31 of the sheet sensor 3 is in contact with the connecting ring surface 43, when the upper box cover 1 and the lower box body 2 of the battery pack 1000 are sealed and fail and water seepage occurs, water drops flow into the first annular groove or the second annular groove along the wall of the lower box body 2, when the water drops cover the sheet sensor 3, the two layers of metal sheets 31 of the sheet sensor 3 are conducted, the resistance of the sheet sensor 3 changes, the sensor 3 detects the water seepage in the battery pack 1000 and sends water seepage alarm information to the battery management system, water seepage alarm is released to a user through the battery management system, continuous use of the water seepage battery pack 1000 is avoided, and the safety of the battery pack 1000 is improved.

According to some embodiments of the invention, the sensor 3 is a linear sensor 3. It can be understood that linear sensor 3 can laminate in last case lid 1 and the seam department of lower box 2, can detect more accurately that infiltration is in battery package 1000 and send infiltration alarm information for battery management system, releases the infiltration warning to the user through battery management system, has avoided the continuous use of infiltration battery package 1000, increases battery package 1000's security.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, comprising:

an upper box cover;

2. The battery pack according to claim 1, wherein the inner side surface of the lower case is formed with a first annular groove that opens upward in the circumferential direction, and the sensor is fittingly mounted in the first annular groove.

3. The battery pack of claim 2, wherein the inner side of the lower case includes a first vertical ring surface, a second vertical ring surface and a connecting ring surface, the second vertical ring surface is spaced apart from the inner side of the first vertical ring surface, the outer periphery of the connecting ring surface is connected to the lower periphery of the first vertical ring surface, and the inner periphery of the connecting ring surface is connected to the lower periphery of the second vertical ring surface, such that the first vertical ring surface, the second vertical ring surface and the connecting ring surface together form the first annular groove.

4. The battery pack of claim 3, wherein the connection ring surface is horizontally disposed.

5. The battery pack of claim 2, wherein the first annular groove is adjacent to the sealed connection between the lower case and the upper case cover.

6. The battery pack according to claim 1, wherein the inner side surface of the lower case is formed with a second annular groove opened horizontally in the circumferential direction or obliquely upward in the inner side direction, and the sensor is fittingly mounted in the second annular groove.

7. The battery pack according to any one of claims 1 to 6, wherein the sensor is a sheet sensor comprising two metal sheets and an insulating layer between the metal sheets on both sides.

8. The battery pack of any of claims 1-6, wherein the sensor is a linear sensor.