CN215070191U

CN215070191U - Battery cell support frame, battery cell module and battery pack

Info

Publication number: CN215070191U
Application number: CN202121499776.4U
Authority: CN
Inventors: 孙勤贺; 何亚飞; 葛增芳
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-12-07
Anticipated expiration: 2031-07-02

Abstract

The application relates to the technical field of battery heat dissipation, and discloses a battery cell support frame, a battery cell module and a battery pack. The battery cell support frame comprises a support frame body, wherein a battery cell lug adapter sheet penetrates through the support frame body; locate the heat conduction portion of support frame body, the heat conduction portion has notch towards the recess that is used for placing the heat conduction glue of contact to electric core frame of electric core frame setting. This application electricity core support frame has improved the radiating efficiency, avoids electric core local temperature too high and has restricted output efficiency.

Description

Battery cell support frame, battery cell module and battery pack

Technical Field

The application relates to the technical field of battery heat dissipation, especially, relate to electric core support frame, electric core module and battery package.

Background

As a core component and a key technology of an electric automobile, the performance of a power battery is closely related to the temperature, and the potential safety hazard of the power battery due to overhigh temperature is easily caused because the battery can generate a large amount of chemical reactions in the charging and discharging processes. Along with the promotion of multiplying power soon fills, the calorific capacity of module copper bar and electric core switching piece (tab) is increasing day by day, the inventor discovers, the current soft packet of module overcurrent element support frame (bus bar module, BBM) mainly is that the bearing structure of module copper bar and electric core tab has only the locating pin contact with module frame or end plate, because of all the other parts all do not contact and can't carry out heat conduction cooling to module copper bar and electric core tab, lead to the electric core local temperature that links to each other with module copper bar and electric core tab to increase unusually easily, thereby cause electric core local aging seriously and electric core local temperature too high and restricted output.

Disclosure of Invention

An object of this application provides an electricity core support frame, electric core module and battery package for electric core support frame has improved the radiating efficiency, avoids electric core local temperature too high and has restricted output efficiency.

In order to solve the above technical problem, a first aspect of the present application provides an electric core support frame, including: the support frame body is used for the battery cell pole lug adapter plate to pass through; locate the heat conduction portion of support frame body, the heat conduction portion has notch towards electric core frame setting be used for placing the contact to the recess of the heat conduction glue of electric core frame.

A second aspect of the present application provides a battery cell module, including the above battery cell support frame, a tab, disposed in the tab disposing area; the battery cell outer frame is fixedly connected with the battery cell support frame; the heat-conducting glue is arranged in the groove and keeps in contact with the battery cell outer frame; a plurality of battery cells sequentially arranged along the arrangement direction of the bus bar arrangement area; and each battery cell tab switching piece respectively penetrates through the battery cell support frame, and the battery cell tab switching pieces are electrically connected with the battery cell tabs.

A third aspect of the present application provides a battery pack including the above battery module.

Compared with the prior art, the battery cell support frame is provided with the heat conduction part to form a heat dissipation path with an external cooling system, so that the heat dissipation efficiency is improved, and the limitation of the output efficiency due to overhigh local temperature of the battery cell is avoided.

In an embodiment of the first aspect, the support frame body includes a plurality of bar-shaped gaps, which are spaced from each other and sequentially arranged to form bar-shaped setting areas for setting the bars.

In an embodiment of the first aspect, the heat conducting portion is provided at the end of the support frame body adjacent to the fin disposing region and extends in the direction in which the fin disposing regions are arranged.

In an embodiment of the first aspect, a first portion of the cell tab interposer is attached to the surface of the tab, and a second portion of the cell tab interposer is electrically connected to the cell tab.

In an embodiment of the first aspect, the cell tab adaptor piece is bent and attached to the surface of the tab.

In an embodiment of the first aspect, the back side of the fin setting area includes at least one rib extending in the longitudinal direction of the fin setting area and connected to the heat conduction portion.

In an embodiment of the first aspect, each end of the support frame body has at least two connecting portions for fixing with the cell outer frame.

In an embodiment of the third aspect, a cooling system is further included to dissipate heat from the battery pack.

Drawings

Fig. 1 is a schematic structural diagram of a cell support frame in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a cell module in an embodiment of the present application;

FIG. 3 is an exploded view of FIG. 2;

fig. 4 is a schematic diagram illustrating an exploded structure of a cell support frame, a tab, and a cell tab adaptor piece according to an embodiment of the present disclosure.

Detailed Description

The embodiments of the present application are described below with specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure of the present application. The present application is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present application. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings so that those skilled in the art to which the present application pertains can easily carry out the present application. The present application may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly explain the present application, components that are not related to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

Throughout the specification, when a device is referred to as being "connected" to another device, this includes not only the case of being "directly connected" but also the case of being "indirectly connected" with another element interposed therebetween. In addition, when a device "includes" a certain component, unless otherwise stated, the device does not exclude other components, but may include other components.

When a device is said to be "on" another device, this may be directly on the other device, but may also be accompanied by other devices in between. When a device is said to be "directly on" another device, there are no other devices in between.

Although the terms first, second, etc. may be used herein to describe various elements in some instances, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first interface and the second interface, etc. are described. Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" include plural forms as long as the words do not expressly indicate a contrary meaning. The term "comprises/comprising" when used in this specification is taken to specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but does not exclude the presence or addition of other features, regions, integers, steps, operations, elements, and/or components.

Terms representing relative spatial terms such as "lower", "upper", and the like may be used to more readily describe one element's relationship to another element as illustrated in the figures. Such terms are intended to include not only the meanings indicated in the drawings, but also other meanings or operations of the device in use. For example, if the device in the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "under" and "beneath" all include above and below. The device may be rotated 90 or other angles and the terminology representing relative space is also to be interpreted accordingly.

Although not defined differently, including technical and scientific terms used herein, all terms have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Terms defined in commonly used dictionaries are to be additionally interpreted as having meanings consistent with those of related art documents and the contents of the present prompts, and must not be excessively interpreted as having ideal or very formulaic meanings unless defined.

In an automotive power battery, an overcurrent element support frame (BBM) is generally used to lead out positive and negative electrodes of a module and support system connections between current passing elements such as a cell tab and an external bus bar, which are generally plastic elements. A first embodiment of the present application is described below with reference to the drawings. As shown in fig. 1, fig. 2 and fig. 3, the cell support frame in this embodiment includes a support frame body 1 and a heat conduction portion 2. The support frame body 1 comprises a plurality of bar piece setting areas 11, and the bar piece setting areas 11 are sequentially arranged and are separated by a plurality of strip-shaped gaps 12. The patch setting area 11 is used for setting the patch 3. The cell Tab transition piece 4(Tab) connected to the bus bar 3 partially penetrates the strip-shaped gap 12. Specifically, the cell tab adaptor sheet 4 includes a first portion 41 and a second portion 42, the first portion 41 is connected to the tab 3, and may be attached to the surface of the tab 3 to achieve electrical connection as shown in fig. 2, and may be implemented by laser welding, and the second portion 42 is electrically connected to a cell tab, and may be implemented by laser welding, or may be implemented by other manners. The first part 41 and the second part 42 of the cell tab adaptor sheet 4 may be bent into two areas as shown in fig. 3, and the first part passing through the gap 12 is attached to the surface of the tab 3, so that the stability of the connection can be enhanced. However, it is understood that the cell tab adaptor piece 4 may also be configured to electrically connect the tab 3 and the cell tab without bending.

The heat conducting part 2 is arranged at the end part of the support frame body 1 and extends along the arrangement direction of the fin arrangement area 11. Specifically, the heat conducting portion 2 may be disposed at an end portion of the support frame body 1, and the heat conducting portion 2 is connected to the tab installation region 11 and extends along an arrangement direction of the tab installation region 11, so as to facilitate heat conduction from the overcurrent elements, such as the tabs 3 and the cell tab adaptor tabs 4, to the heat conducting portion 2 adjacent thereto. The heat conducting portion 2 may be a heat conducting glue groove in which heat conducting glue can be placed, but may also be in other structural forms. The notch of heat conduction portion 2 is towards electric core frame 5, and the inslot of heat conduction portion 2 is placed and is contacted the heat conduction glue of electric core frame 5. The heat is transferred to the electric core outer frame 5 through the heat-conducting glue, the electric core outer frame 5 is cooled by a cooling system (not shown in the figure) connected with the electric core outer frame, and therefore a radiating path of a bus piece/electric core lug adapter piece → an electric core support frame → the heat-conducting glue → the electric core outer frame → the cooling system is formed, the temperature of overcurrent pieces such as the bus piece and the electric core lug adapter piece is effectively reduced, the local temperature of an electric core connected with the electric core lug adapter piece is further reduced, and the problem that the output power is limited due to local aging of the electric core and overhigh local temperature of the electric core is avoided.

In some embodiments, as shown in fig. 4, the back side of the fin installation area 11 is further provided with a reinforcing rib 13, the reinforcing rib 13 extends along the length direction of the fin installation area 11 and is connected with the heat conduction part 2, and the reinforcing rib 13 is arranged to ensure the strength of the plastic member under the condition that the weight of the fin installation area is reduced properly. Every piece setting area 11's dorsal part can set up many strengthening ribs 13 in this embodiment, both can strengthen the electric core support frame and go up the piece setting area 11 and the fastness of being connected of heat-conducting part 2 through setting up many strengthening ribs 13, can increase the dorsal heat radiating area in piece setting area 11 again to and increase and the area of contact of heat-conducting part 2, strengthened heat conduction efficiency.

A second embodiment of the present application relates to a cell module. As shown in fig. 2 and 3, the battery cell module of the present application includes the battery cell support frame (support frame body 1 and heat conduction portion 2), the bus bar 3, the special tab 4 for the battery cell tab, the battery cell outer frame 5, the heat conduction adhesive (not shown in the figure), and the plurality of battery cells 6 in the above embodiments. Specifically, the rib 3 is disposed in the rib disposing area 11, the heat conducting glue is disposed in the groove of the heat conducting portion 2 of the cell support frame, and the heat conducting glue keeps contact with the cell outer frame 5 to conduct heat to the cell outer frame 5. The electric core outer frame 5 is fixedly connected with the electric core support frame through the connecting parts of the end parts of the support frame body 1, and the connecting parts of the end parts are at least two. The bottom of the support frame body 1 is provided with two positioning pins 14, which can be combined with corresponding holes at corresponding positions of the battery cell outer frame 5 to form a fixing structure, so as to install and position the battery cell support frame. The side portion of the support frame body 1 also has a side connecting portion 15 fixed to the cell outer frame 5, and the side connecting portion 15 may be any fixed connecting structure, which is not limited herein. In this embodiment, the battery cell outer frame 5 is a U-shaped frame, and may also be an outer frame with other shapes, which is not limited herein.

The support frame body 1 comprises a plurality of pole piece setting areas 11, the pole piece setting areas 11 are arranged in sequence at intervals of a plurality of strip-shaped gaps 12, each battery cell pole lug adapter plate 4 penetrates through each gap 12, and a plurality of battery cells 6 are arranged in sequence along the arrangement direction of the pole piece setting areas 11. One end of the cell tab switching piece 4 is connected with the pole piece 3, and the other end is electrically connected with a cell tab (not shown in the figure), so that the temperature of the over-current pieces such as the pole piece and the cell tab switching piece is effectively reduced, the local temperature of the cell connected with the cell tab switching piece is further reduced, and the problem that the output power is limited due to local aging of the cell and overhigh local temperature of the cell is avoided.

A third embodiment of the present application relates to a battery pack. The battery pack comprises the battery module in the second embodiment, and the battery pack further comprises a cooling system used for cooling the battery pack, so that the battery pack can be cooled more efficiently, the temperature of overcurrent pieces such as a bus bar piece and a battery cell tab switching piece is effectively reduced, the local temperature of a battery cell connected with the battery cell tab switching piece is further reduced, and the problem that the output power is limited due to local aging of the battery cell and overhigh local temperature of the battery cell is solved.

The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims

1. The utility model provides a battery cell support frame which characterized in that includes:

the support frame body is used for the battery cell pole lug adapter plate to pass through;

locate the heat conduction portion of support frame body, the heat conduction portion has notch towards electric core frame setting be used for placing the contact to the recess of the heat conduction glue of electric core frame.

2. The cell support frame of claim 1, wherein the support frame body comprises a plurality of bar-shaped setting areas spaced by a plurality of bar-shaped gaps and arranged in sequence for setting bars.

3. The cell support frame of claim 2, wherein the heat conducting portion is disposed at the end of the frame body and adjacent to the tab disposing region and extends along the arrangement direction of the tab disposing region.

4. The cell support frame of claim 2, wherein a first portion of the cell tab adaptor sheet is attached to the surface of the tab, and a second portion is electrically connected to the cell tab.

5. The cell support frame of claim 4, wherein the cell tab adaptor tab is bent to fit the surface of the tab.

6. The cell support frame of claim 2, wherein the back side of the tab placement area comprises at least one rib extending along the length of the tab placement area and connected to the heat conducting portion.

7. The cell support frame of claim 1, wherein each end of the support frame body has at least two connecting portions for fixing with the cell outer frame.

8. The utility model provides a battery cell module which characterized in that includes:

the cell support frame of any of claims 1-7,

the fins are arranged in the fin arrangement area;

the battery cell outer frame is fixedly connected with the battery cell support frame;

the heat-conducting glue is arranged in the groove and keeps in contact with the battery cell outer frame;

a plurality of battery cells sequentially arranged along the arrangement direction of the bus bar arrangement area; and each battery cell tab switching piece respectively penetrates through the battery cell support frame, and the battery cell tab switching pieces are electrically connected with the battery cell tabs.

9. A battery pack comprising the battery module according to claim 8.

10. The battery pack of claim 9, further comprising a cooling system to dissipate heat from the battery pack.