CN211654988U

CN211654988U - Battery module, battery pack, and device using battery pack

Info

Publication number: CN211654988U
Application number: CN202020017327.0U
Authority: CN
Inventors: 莫违华
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-10-09
Anticipated expiration: 2030-01-06

Abstract

The utility model discloses a battery module, it includes: a plurality of battery cells electrically connected to each other; and a battery case accommodating the plurality of battery cells; the battery pack is characterized in that a heat insulation pad is arranged between the plurality of battery units, a temperature acquisition unit is arranged on the heat insulation pad, and the temperature acquisition unit is used for acquiring the temperatures of the plurality of battery units. Compared with the prior art, the utility model discloses battery module sets up the first chamber that holds on thermal-insulated stacking up to the temperature acquisition unit that will be equipped with heat conduction silica gel places the first chamber that holds, and the temperature on battery cell surface can be conducted the temperature acquisition unit through heat conduction silica gel, makes the temperature that the temperature acquisition unit gathered be close to the inside actual temperature of battery cell. Furthermore, the utility model also discloses an adopt the utility model discloses battery module's group battery and the device of adopting the group battery.

Description

Battery module, battery pack, and device using battery pack

Technical Field

The utility model belongs to the battery field, more specifically says, the utility model relates to a can accurately gather battery module, group battery of battery cell temperature and use device of group battery.

Background

At present, in a battery module, a sampling scheme of the temperature of a battery unit is mainly to collect the temperature of a battery unit connecting bar to replace the temperature of the battery unit. However, when the temperature under the instantaneous large-current working condition is collected, the temperature difference between the temperature of the bus bar and the temperature of the battery unit is large, and the temperature of the battery unit cannot be accurately collected.

In view of the above, it is necessary to provide a battery module, a battery pack and a device using the battery pack, which can accurately collect the temperature of the battery cells.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a utility model aim at: the defects of the prior art are overcome, and the battery module, the battery pack and the device using the battery pack, which can accurately acquire the temperature of the battery unit, are provided.

In order to achieve the above object, the present invention provides a battery module, which includes:

a plurality of battery cells electrically connected to each other; and

a battery case that accommodates the plurality of battery cells;

the battery pack is characterized in that a heat insulation pad is arranged between the plurality of battery units, a temperature acquisition unit is arranged on the heat insulation pad, and the temperature acquisition unit is used for acquiring the temperatures of the plurality of battery units.

The utility model discloses among the battery module, be equipped with the heat insulating mattress between the battery unit, set up the temperature acquisition unit on the heat insulating mattress, the temperature on battery unit surface can be conducted the temperature acquisition unit in real time, and the temperature of gathering is closer to the inside actual temperature of battery unit, does not receive the operating mode restriction.

As an improvement of the battery module of the present invention, the heat insulating pad is provided with a first accommodating chamber, and the temperature collecting unit is correspondingly accommodated in the first accommodating chamber.

As an improvement of the battery module of the present invention, the first accommodating chamber is disposed at the top of the height direction of the battery module.

As an improvement of the battery module of the present invention, the first accommodating chamber is disposed at an intermediate position of the heat insulating mat top along a width direction of the battery module.

As an improvement of the battery module of the present invention, the temperature acquisition unit is bonded in the first accommodating cavity through the structural adhesive.

As an improvement of the battery module, the temperature acquisition unit with be equipped with the heat conduction material between the battery cell, the heat conduction material is used for connecting the temperature acquisition unit with the battery cell, so that the heat of battery cell realizes the conduction.

As an improvement of the battery module of the present invention, the heat conductive material is heat conductive silica gel.

The utility model discloses among the battery module, set up first chamber, paste the temperature acquisition unit through the structure glue and fix in first chamber that holds through the top intermediate position at the heat insulating mattress, can guarantee the stable position of temperature acquisition unit and with adjacent battery cell's contact stability, improve temperature measurement's accuracy.

As an improvement of the battery module, the temperature acquisition unit is provided with the signal line, the signal line electrically links to each other with the circuit board for transmitting the temperature data of battery cell.

In order to achieve the above object, the present invention also provides a battery pack, which includes: the box body is provided with a second accommodating cavity; battery module, battery module hold in the second holds in the chamber, wherein, battery module does the utility model discloses aforementioned battery module.

Furthermore, the utility model also provides an use the utility model discloses the device of group battery, it includes the utility model discloses the group battery, the group battery is used for providing the electric energy. The utility model discloses adopted the temperature that the temperature acquisition unit was real-time, accurately gathered a plurality of battery cell in group battery and device, provided the reference for the safe handling of group battery and device.

Drawings

The following detailed description of the battery module, battery pack, and device using the battery pack and its technical effects will be made with reference to the accompanying drawings and detailed description, in which:

fig. 1 is a schematic view of a vehicle using the battery pack of the present invention.

Fig. 2 is a schematic structural diagram of the battery pack of the present invention.

Fig. 3 is a schematic structural diagram of the battery module of the present invention.

Fig. 4 is a schematic structural view of the thermal insulating pad in the battery module according to the present invention.

Reference numerals:

1-a battery module;

10-a battery cell; 100-a housing; long side-102; short side-104; a top cover-106; 108-electrode terminals;

20-a battery case; a side plate-200; an end plate 202;

30-a heat insulation mat; 300-a first receiving cavity; 302-structural adhesive; 304-a temperature acquisition unit; 306-signal lines;

4-a battery pack;

40-a box body; 400-second receiving chamber.

Detailed Description

In order to make the purpose, technical solution and technical effect of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments described herein are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is only one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present application are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

An embodiment of the present application provides an use the utility model discloses the device of group battery as power, wherein, the device that uses the group battery as the power includes mobile device such as vehicle, boats and ships, small aircraft, and the device includes power supply and group battery, and this power supply is used for providing drive power for the device, and the group battery is configured to provide the electric energy to the power supply. The driving force of the device can be electric energy, and can also include electric energy and other energy sources (such as mechanical energy), the power source can be a battery pack, and the power source can also be a battery pack, an engine and the like. In some embodiments, the device may further include an energy storage structure including a battery pack and an electronic control assembly coupled to the battery pack for controlling input and output of electrical energy provided by the battery pack.

Referring to fig. 1, taking a vehicle as an example, the device in the embodiment of the present application may be a new energy vehicle, which may be a pure electric vehicle, a hybrid electric vehicle, or an extended range vehicle. The vehicle may include a battery pack and a vehicle body, the battery pack 4 is disposed in the vehicle body, the vehicle body is further provided with a driving motor (not shown in the figure), the driving motor is electrically connected to the battery pack, the battery pack 4 provides electric power, and the driving motor is connected to wheels on the vehicle body through a transmission mechanism, thereby driving the vehicle to travel. Specifically, the battery pack may be horizontally disposed at the bottom of the vehicle body.

Referring to fig. 2, the present invention also discloses a battery pack, which includes a box 40 having a second accommodating chamber 400; a plurality of battery modules 1 accommodated in the second accommodation chamber 400; here, the type of the case 40 is not limited, and may be a frame-shaped case, a disk-shaped case, a box-shaped case, or the like, as long as the battery module 1 can be accommodated and sealing can be achieved.

Referring to fig. 3, the present invention provides a battery module 1, which includes: the battery pack includes a plurality of battery cells 10 and a battery case 20 accommodating the plurality of battery cells 10, wherein the plurality of battery cells 10 are electrically connected to each other, a heat insulating mat 30 is provided between the plurality of adjacent battery cells 10, a temperature acquisition unit 304 is provided on the heat insulating mat 30, and the temperature acquisition unit 304 is configured to acquire the temperatures of the plurality of battery cells 10.

Each battery cell 10 includes a case 100, an electrode assembly (not shown) received in the case 100, a top cap 106 mounted on the case 100, and a pair of electrode terminals 108 protruding out of the top cap 106. The top cap 106 is mounted to the battery case 100 by welding, and ensures the overall sealability of the battery cell 10. A pair of electrode terminals 108 protrude from the battery top cap 106, and the electrode terminals 108 of adjacent battery cells 10 are electrically connected by a connecting tab to form a battery pack in a certain manner.

This application sets up temperature acquisition unit 304 on heat insulating mattress 30 to the temperature of guaranteeing to gather is more accurate, gets rid of and arouses the temperature that detects because the heat dissipation and crosses low or because the too high scheduling problem of temperature that electronic terminal 108 generated heat and detected. In addition, because the temperature acquisition unit 304 is arranged on the heat insulation pad 30, the temperature acquisition unit 304 can be effectively prevented from being damaged by other components, and the service life of the temperature acquisition unit 304 is prolonged.

It should be noted that the case 100 may be made of aluminum, aluminum alloy, or nickel-plated steel, the case 100 is provided with a pair of long sides 102 having a relatively large area and a pair of short sides 104 having a relatively small area, and the temperature collection unit 304 is disposed on the long sides 102 of the battery cell 10.

The battery box 20 includes a pair of side plates 200 and a pair of end plates 202, the side plates 200 and the end plates 202 together enclose a receiving space (not labeled) for receiving the plurality of battery units 10 therein, and a heat insulation pad 20 is disposed between each two adjacent battery units 10.

Referring to fig. 4, the heat insulation pad 30 is a flat plate structure, and a first accommodating chamber 300 is disposed on the heat insulation pad 30. Preferably, the first receiving cavity 300 is provided at the top of the heat insulating mat 30 in the height direction (the top in the Z direction shown in fig. 3) adjacent to the battery module 1. The temperature collection unit 304 is received and fixed in the first receiving cavity 300 to prevent the temperature collection unit 304 from moving or falling off in the first receiving cavity 300, so that the temperature collection unit 304 cannot reliably contact the battery unit 10, and the accuracy of temperature measurement is affected. The first accommodating cavity 300 is arranged at the top, so that the expansion of the battery can be effectively avoided, and the temperature acquisition unit 304 is damaged. Preferably, the first receiving cavity 300 may be disposed at a middle position (middle position in the Y direction shown in fig. 3) of the top of the heat insulation pad 30 along the width direction of the battery module 1, that is, the temperature collecting unit 304 is disposed between two electrode terminals 108, so that the temperature of the electrode terminals 108 can be effectively prevented from affecting the actually collected temperature.

In order to collect the more accurate temperature of the battery pack, according to an embodiment of the present invention, the surface of the temperature collection unit 304 facing the battery unit 10 is coated with a heat conductive material, and the heat conductive material is disposed near the same level as the surface of the heat insulation pad 30. The heat conductive material is not particularly limited as long as it has a desirable heat conductive property such that the temperature collected by the temperature collection unit 304 is closer to the actual temperature inside the battery cell 10. For example, according to an embodiment of the present invention, the heat conductive material 302 is a heat conductive silicone and has good adhesion to ensure the stable position of the temperature collecting unit 304 and good contact with the long side 102 of the adjacent battery unit 10, so that the finally collected temperature is closer to the actual temperature inside the battery unit.

In order to facilitate the installation of the battery pack, according to another embodiment of the present invention, the temperature collection unit 304 is adhered to the first accommodating chamber 300 by a structural adhesive having good adhesiveness, so that the installation process can be simplified, and the temperature collection unit 304 and the heat insulating mat 30 can be quickly installed.

As shown in fig. 4, each temperature acquisition unit 304 is provided with a signal line 306, and the signal line 306 is electrically connected to the circuit board for transmitting the temperature data of the battery unit 10, so as to measure the temperature of the battery unit 10 accurately in real time.

Compared with the prior art, the utility model discloses battery module 1 has following advantage: set up first chamber 300 that holds on heat insulating mattress 30, adopt heat conduction material 302 cladding temperature acquisition unit 304 such as heat conduction silica gel, and place the temperature acquisition unit 304 that the cladding has heat conduction silica gel in heat insulating mattress 30 first hold the chamber 300 and with battery unit 10 steady contact, the temperature on battery unit 10 surface can be conducted temperature acquisition unit 304 through heat conduction material 302, the temperature that makes temperature acquisition unit 304 gather more is close the inside actual temperature of battery unit 10, do not receive the operating mode restriction. The utility model discloses adopted temperature acquisition unit 304 in group battery and the device real-time, accurately gather the temperature of a plurality of battery cell 10, provide the reference for the safe handling of group battery and device.

Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A battery module, characterized in that the battery module comprises:

a plurality of battery cells electrically connected to each other; and

a battery case that accommodates the plurality of battery cells;

2. The battery module as claimed in claim 1, wherein the heat insulating mat is provided with a first receiving cavity, and the temperature collecting unit is correspondingly received in the first receiving cavity.

3. The battery module according to claim 2, wherein the first receiving cavity is provided at the top in the height direction of the battery module.

4. The battery module according to claim 3, wherein the first receiving cavity is provided at a middle position of the top of the heat insulation mat in a width direction of the battery module.

5. The battery module according to claim 2, wherein the temperature collection unit is bonded in the first receiving cavity by a structural adhesive.

6. The battery module according to claim 1, wherein a heat conducting material is arranged between the temperature acquisition unit and the battery unit, and the heat conducting material is used for connecting the temperature acquisition unit and the battery unit so as to conduct heat of the battery unit.

7. The battery module of claim 6, wherein the thermally conductive material is a thermally conductive silicone.

8. The battery module according to any one of claims 1 to 7, wherein the temperature acquisition unit is provided with a signal line electrically connected to a circuit board for transmitting temperature data of the battery cell.

9. A battery pack, characterized in that the battery pack comprises: the box body is provided with a second accommodating cavity; a battery module accommodated in the second accommodation chamber, the battery module being the battery module according to any one of claims 1 to 8.

10. An apparatus using a battery pack, wherein the apparatus using a battery pack comprises the battery pack of claim 9, the battery pack being used to supply electric power.