CN209948006U

CN209948006U - Laminate polymer battery module and electric vehicle who has this laminate polymer battery module

Info

Publication number: CN209948006U
Application number: CN201920947741.9U
Authority: CN
Inventors: 彭健; 刘丽荣; 李盘忠; 蒋思文; J·W·江
Original assignee: Farasis Energy Ganzhou Co Ltd
Current assignee: Farasis Energy Ganzhou Co Ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-01-14
Anticipated expiration: 2029-06-21

Abstract

The utility model discloses a laminate polymer battery module and electric vehicle who has this laminate polymer battery module. Laminate polymer battery module includes: a housing having a receiving cavity therein; the bus bar is arranged in the accommodating cavity; the soft-package battery cells are arranged in the accommodating cavity, each soft-package battery cell is provided with a tab, and the tabs of the soft-package battery cells are connected with the busbar; the heat-conducting adhesive layer is in contact with the tab of each soft-package battery cell; and the heater is in contact with the heat-conducting adhesive layer. According to the utility model discloses laminate polymer battery module has advantages such as the temperature uniformity of excellent performance, laminate polymer battery core is good.

Description

Laminate polymer battery module and electric vehicle who has this laminate polymer battery module

Technical Field

The utility model relates to a battery field specifically, relates to the laminate polymer battery module, still relates to the electric vehicle who has this laminate polymer battery module.

Background

The temperature has a very significant influence on the performance of the lithium ion battery (including the capacity, power, charge-discharge efficiency, safety, service life and the like of the battery). The sensitivity of the lithium ion battery to temperature mainly results from the temperature sensitivity of the physical and chemical properties of the material. The temperature directly affects the activity and conductivity of an electrode material, the insertion and extraction of lithium ions into and from an electrode, the lithium ion permeability of a separator, and the like, and further affects the electrochemical reaction inside a battery. Under a low-temperature environment, the charge and discharge power performance of the lithium ion battery is limited, and the performance of the lithium ion battery can be maintained only by preheating the lithium ion battery.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a laminate polymer battery module and electric vehicle who has this laminate polymer battery module in order to overcome the problem that prior art exists.

In order to achieve the above object, the utility model discloses the first aspect provides a laminate polymer battery module, laminate polymer battery module includes: a housing having a receiving cavity therein; the bus bar is arranged in the accommodating cavity; the soft-package battery cells are arranged in the accommodating cavity, each soft-package battery cell is provided with a tab, and the tabs of the soft-package battery cells are connected with the busbar; the heat-conducting adhesive layer is in contact with the tab of each soft-package battery cell; and the heater is in contact with the heat-conducting adhesive layer.

According to the utility model discloses a laminate polymer battery module has the good advantage of the temperature uniformity of excellent performance, laminate polymer battery core.

Preferably, the laminate polymer battery module further includes utmost point ear support, the busbar is established on the utmost point ear support, every laminate polymer battery core the utmost point ear passes the utmost point ear support.

Preferably, every laminate polymer core's utmost point ear includes the body and establishes bend portion on the body, the body passes utmost point ear support, wherein every utmost point ear the portion of bending establish on the busbar, heat-conducting glue layer and every utmost point ear the portion of bending contact.

Preferably, the bent portion is welded on the upper surface of the busbar, one of the tab support and the busbar is provided with a positioning hole, the other of the tab support and the busbar is provided with a positioning column, and the positioning column is matched in the positioning hole.

Preferably, it is a plurality of soft-packaged electrical core constitutes a plurality of electric core modules, every the electric core module includes a plurality ofly soft-packaged electrical core, the heat-conducting glue film is a plurality of, and is a plurality of is established a plurality of to some one-to-one of heat-conducting glue film a plurality of anodal ears of electric core module on the upper surface of the portion of bending, it is a plurality of all the other parts one-to-one of heat-conducting glue film is established a plurality of to a plurality of negative pole ears of electric core module on the upper surface of the portion of bending.

It is a plurality of soft-packaged electrical core constitutes a plurality of electric core modules, every electric core module includes a plurality of soft-packaged electrical core, heat-conducting adhesive layer is a plurality of, and is a plurality of heat-conducting adhesive layer establishes with one-to-one a plurality of electric core module a plurality of utmost point ear on the upper surface of the portion of bending.

Preferably, the heat-conducting glue layer is a heat-conducting silica gel layer.

Preferably, the heater includes: a heating element support; and the PTC heating element is arranged on the upper surface of the heat-conducting glue layer, wherein the heating element support, the PTC heating element and the tab support are installed together through a fastener.

Preferably, the heating element support, the PTC heating element, and the tab support are mounted together by screws.

Preferably, the thermal conductive adhesive layer is in a compressed state.

The utility model discloses the second aspect provides electric vehicle, electric vehicle includes according to the utility model discloses the first aspect laminate polymer battery module.

According to the utility model discloses an electric vehicle has excellent performance's advantage.

Drawings

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

FIG. 2 is an enlarged view of area A of FIG. 1;

fig. 3 is an enlarged view of a region B in fig. 2;

fig. 4 is an explosion diagram of laminate polymer battery module according to the embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The pouch battery module 1 according to an embodiment of the present invention is described below with reference to the drawings. As shown in fig. 1-4, the pouch battery module 1 according to the embodiment of the present invention includes a housing 10, a bus bar 20, a thermal conductive adhesive layer 40, a heater 50, and a plurality of pouch cells 30.

The housing 10 has a receiving cavity 110 therein. The busbar 20 is arranged in the accommodating cavity 110, and the plurality of soft-package cells 30 are arranged in the accommodating cavity 110. Each of the soft-package cells 30 has a tab 310, and the tabs 310 of the plurality of soft-package cells 30 are connected to the busbar 20, that is, the tab 310 of each of the soft-package cells 30 is connected to the busbar 20. The heater 50 is in contact with the thermal conductive adhesive layer 40, and the thermal conductive adhesive layer 40 is in contact with the tab 310 of each soft package cell 30.

According to the utility model discloses laminate polymer battery module 1 is through setting up the heat-conducting glue layer 40 that all contacts with the utmost point ear 310 of heater 50 and every laminate polymer battery core 30 to the heat that can make heater 50 produce passes through heat-conducting glue layer 40 and transmits evenly on the utmost point ear 310 of a plurality of laminate polymer battery cores 30. Therefore, not only can the heat transfer efficiency be improved, but also the heater 50 can be used for uniformly heating the plurality of soft package cells 30, so that the temperature consistency of the plurality of soft package cells 30 can be greatly improved. From this can avoid influencing laminate polymer core 30's performance because of the low temperature, and then influence laminate polymer battery module 1's performance.

Therefore, according to the utility model discloses laminate polymer battery module 1 has (under the low temperature environment) excellent performance, laminate polymer battery core 30's temperature uniformity advantage such as good.

As shown in fig. 1-4, in some embodiments of the present invention, the pouch battery module 1 includes a housing 10, a bus bar 20, a tab support 60, a thermal adhesive layer 40, a heater 50, and a plurality of pouch cells 30. The bus bar 20, the tab support 60, the thermal conductive adhesive layer 40, the heater 50 and the plurality of soft-package cells 30 are all located in the housing 10.

The bus bar 20 is provided on the tab holder 60. Preferably, one of the tab support and the busbar is provided with a positioning hole, and the other of the tab support and the busbar is provided with a positioning column, and the positioning column is matched in the positioning hole. Thereby making it possible to more firmly fit the bus bar 20 and the tab holder 60 together.

The tab 310 of each soft package cell 30 passes through the tab support 60.

As shown in fig. 3, in an embodiment of the present invention, the tab 310 of each soft package core 30 includes a body 311 and a bent portion 312 disposed on the body 311. The body 311 passes through the tab holder 60. That is, a portion of the body 311 is located in the through-hole 610 of the tab holder 60, and the remaining portion of the body 311 protrudes through the through-hole 610 of the tab holder 60. The bent portion 312 of each tab 310 is provided on the bus bar 20, and the thermal conductive adhesive layer 40 is in contact with the bent portion 312 of each tab 310. Therefore, the structure of the soft package battery module 1 is more reasonable.

Preferably, the bent portion 312 is welded on the upper surface of the bus bar 20, and the thermal conductive adhesive layer 40 is in contact with the upper surface of the bent portion 312 of each tab 310. Therefore, the structure of the soft package battery module 1 is more reasonable. The vertical direction is shown by an arrow C in fig. 3.

As shown in fig. 3, in one example of the present invention, the heater 50 includes a heating element holder 510 and a PTC heating element 520. That is, the heater 50 is a PTC heater. The PTC heating elements 520 are provided on the upper surface of the thermally conductive adhesive layer 40, and the heating element support 510, the PTC heating elements 520 and the tab support 60 are mounted together by fasteners.

Preferably, the heating element support 510, the PTC heating element 520 and the tab support 60 are mounted together by screws.

The thermal conductive adhesive layer 40 is in a compressed state. That is, the uncompressed thickness of the thermal conductive adhesive layer 40 is smaller than the distance between the bending portion 312 and the heating element support 510 in the vertical direction. By placing the thermal conductive adhesive layer 40 in a compressed state, the heating element support 510 can be in close contact with the thermal conductive adhesive layer 40 and the bending portion 312 can be in close contact with the thermal conductive adhesive layer 40. Therefore, the heat transfer efficiency can be further improved, and moreover, the heat can be effectively transferred to each bent part 312, so that the temperature consistency of the plurality of soft package cells 30 is further improved.

As shown in fig. 2-4, in some examples of the present invention, a plurality of soft-packaged battery cells 30 constitute a plurality of battery cell modules, and each of the battery cell modules includes a plurality of soft-packaged battery cells 30. The number of the heat-conducting adhesive layers 40 is multiple, a part of the plurality of heat-conducting adhesive layers 40 is disposed on the upper surfaces of the bending portions 312 of the plurality of positive tabs of the plurality of cell modules in a one-to-one correspondence, and the rest of the plurality of heat-conducting adhesive layers 40 is disposed on the upper surfaces of the bending portions 312 of the plurality of negative tabs of the plurality of cell modules in a one-to-one correspondence.

That is, the number of the thermal conductive adhesive layers 40 may be equal to twice the number of the cell modules, the upper surfaces of the bent portions 312 of all positive electrode tabs of one of the cell modules are in contact with one of the thermal conductive adhesive layers 40, and the upper surfaces of the bent portions 312 of all negative electrode tabs of one of the cell modules are in contact with the other thermal conductive adhesive layer 40. The heater 50(PTC heating element 520) can thereby heat the plurality of soft-package cells 30 of each of the cell modules more uniformly, so that the temperature uniformity of the plurality of soft-package cells 30 of each of the cell modules can be further improved.

Preferably, the thermal conductive adhesive layer 40 is a thermal conductive silicone adhesive layer.

According to the utility model discloses laminate polymer battery module 1's heat transfer route does: the heater comprises 50 parts of a heat-conducting adhesive layer 40 parts of a lug 310 parts of a copper aluminum foil part, a positive electrode material, a negative electrode material, a diaphragm, electrolyte, an aluminum mould part and an external part of a battery cell.

Under a specific experimental condition, after the lowest temperature of the soft-package battery cell 30 reaches 10 ℃, the heater 50 stops working, and the internal heat source of the soft-package battery module 1 mainly generates heat for charging the soft-package battery cell 30 per se. Under the low temperature heating slow charging operating mode, according to the utility model discloses a plurality of laminate polymer core 30's of laminate polymer battery module 1 the difference in temperature is less than 5 ℃, and rate of heating can reach 25 ℃ -30 ℃/h, and a plurality of laminate polymer core 30's in the same laminate polymer battery module 1 temperature keeps unanimous basically, and laminate polymer battery module 1's temperature uniformity is better.

The utility model discloses still provide electric vehicle. According to the utility model discloses electric vehicle includes laminate polymer battery module 1 according to above-mentioned embodiment. Therefore, the electric vehicle according to the embodiment of the present invention has advantages such as excellent performance (in a low-temperature environment).

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. The utility model provides a laminate polymer battery module (1), its characterized in that includes:

a housing (10), wherein the housing (10) is provided with a containing cavity (110);

a bus bar (20), the bus bar (20) being disposed within the housing chamber (110);

the soft-package battery cells (30) are arranged in the accommodating cavity (110), each soft-package battery cell (30) is provided with a tab (310), and the tabs (310) of the soft-package battery cells (30) are connected with the busbar (20);

the heat-conducting adhesive layer (40), wherein the heat-conducting adhesive layer (40) is in contact with the tab (310) of each soft packaging battery cell (30); and

a heater (50), the heater (50) being in contact with the layer of thermally conductive adhesive (40).

2. The laminate battery module (1) according to claim 1, further comprising a tab support (60), wherein the bus bar (20) is arranged on the tab support (60), and the tab (310) of each laminate battery cell (30) passes through the tab support (60).

3. The pouch battery module (1) according to claim 2, wherein the tab (310) of each pouch cell (30) comprises a body (311) and a bent portion (312) formed on the body (311), the body (311) penetrates through the tab support (60), the bent portion (312) of each tab (310) is formed on the bus bar (20), and the heat conductive adhesive layer (40) is in contact with the bent portion (312) of each tab (310).

4. The laminate battery module (1) according to claim 3, wherein the bent portion (312) is welded on the upper surface of the busbar (20), one of the tab support (60) and the busbar (20) is provided with a positioning hole, and the other of the tab support (60) and the busbar (20) is provided with a positioning column which is fitted in the positioning hole.

5. The pouch battery module (1) according to claim 3, wherein the plurality of pouch cells (30) form a plurality of cell modules, each cell module comprises a plurality of pouch cells (30), the number of the heat-conducting adhesive layers (40) is multiple, a part of the heat-conducting adhesive layers (40) is arranged on the upper surfaces of the bending portions (312) of the plurality of positive electrode tabs of the cell modules in a one-to-one correspondence manner, and the rest part of the heat-conducting adhesive layers (40) is arranged on the upper surfaces of the bending portions (312) of the plurality of negative electrode tabs of the cell modules in a one-to-one correspondence manner.

6. The laminate battery module (1) according to claim 5, wherein the thermal conductive adhesive layer (40) is a thermal conductive silicon adhesive layer.

7. The pouch battery module (1) according to claim 2 wherein the heater (50) comprises:

a heating element holder (510); and

a PTC heating element (520), the PTC heating element (520) being provided on an upper surface of the heat conductive adhesive layer (40), wherein the heating element support (510), the PTC heating element (520), and the tab support (60) are mounted together by a fastener.

8. The pouch battery module (1) according to claim 7, wherein the heating element holder (510), the PTC heating element (520) and the tab holder (60) are mounted together by screws.

9. The pouch battery module (1) according to any one of claims 1 to 8 wherein the layer of thermally conductive adhesive (40) is in a compressed state.

10. An electric vehicle characterized by comprising the pouch battery module (1) according to any one of claims 1 to 9.