CN213278323U

CN213278323U - Battery pack

Info

Publication number: CN213278323U
Application number: CN202022221748.8U
Authority: CN
Inventors: 李坤龙; 王慎波
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Dongguan Poweramp Technology Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-05-25
Anticipated expiration: 2030-09-30
Also published as: WO2022068136A1

Abstract

The application discloses group battery includes: a circuit board; a cell assembly comprising a plurality of cells, the cells comprising tabs; wherein the battery pack further includes a plurality of connection terminals, the connection terminals including: contact site, weld part and connection the weld part with the connecting portion of contact site, the contact site connect in utmost point ear, the weld part connect in the circuit board. And the fixing support is used for fixing the connecting terminal. By using the connecting terminal to replace a sampling line and a sampling sheet, a wireless welding process is realized in the production process, so that the process is simple, the cost is low, and the safety is high.

Description

Battery pack

Technical Field

The present application relates to the field of energy, and more particularly to battery packs.

Background

Among the prior art, the connecting terminal of battery includes sampling piece and sampling line, through with the utmost point ear of sampling piece welding to electric core, sampling line welding to sampling piece, and then switches on the utmost point ear of electric core and circuit board, but this kind of scheme location difficulty when the installation to easy short circuit, actual production technology is complicated, and production efficiency is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of difficult installation and positioning of the connecting terminal in the battery, complex production process, low production efficiency and the like, the invention provides a battery pack, which comprises the following components in part by weight:

a battery pack, comprising:

a circuit board;

the battery core assembly comprises a plurality of battery cells, and each battery cell comprises a tab;

the battery pack further includes a plurality of connection terminals, each of which includes:

the contact part contacts and is electrically connected with the lug, and the welding part is welded and is electrically connected with the circuit board;

the battery pack further comprises a fixing bracket for fixing the connection terminal.

In certain embodiments, the plurality of cells are stacked in a thickness direction of the cells; the contact part of connecting terminal sets up along first direction, connecting terminal's connecting portion are followed the direction setting is piled up to electric core, first direction perpendicular to the direction is piled up to electric core, contact part and connecting portion form L type structure.

In some embodiments, the contact portion is provided with a protrusion disposed toward the tab, the protrusion contacting and electrically connecting the tab.

In some embodiments, the contact portion includes a resilient portion, and the protrusion is provided on the resilient portion.

In some embodiments, the fixing bracket is provided with a receiving groove facing a side wall of the electric core assembly, and the connecting portion of the connecting terminal is fixed in the receiving groove.

In some embodiments, the connecting portion includes a fixing portion, the fixing portion is fixedly connected to the fixing bracket, the fixing portion includes a hook portion, a flange portion is disposed in the accommodating groove, and the flange portion and the hook portion are fastened and fixed to each other.

In some embodiments, the fixing bracket is provided with a first separation structure facing a side wall of the electric core assembly, and the first separation structure separates the contact portions from each other.

In some embodiments, the side wall of the fixing bracket facing the electric core assembly is provided with a second partition structure, and the second partition structure separates the connecting parts from each other.

In certain embodiments, the circuit board is disposed along the cell stacking direction.

In some embodiments, the battery pack further includes a bottom case receiving the fixing bracket and the battery pack assembly, and a stopper catch provided at an inner edge of the bottom case for mounting and fixing the fixing bracket.

In some embodiments, the battery pack further includes a filling member disposed at both ends of the battery cell assembly opposite to the tabs, the filling member being disposed between the battery cell assembly and the wall of the bottom case, the filling member being in a compressed state.

The battery pack provided by the application replaces the sampling line and the sampling sheet adopted in the prior art by utilizing the connecting terminal, and the wireless welding process is adopted in the production process, so that the process is simple, the cost is low, and the safety is high.

Drawings

Fig. 1 is a schematic partial structure diagram of a battery pack according to an embodiment of the present disclosure;

fig. 2 is a schematic view of a fixing bracket of a battery pack according to an embodiment of the present disclosure;

fig. 3 is an assembly view of a connection terminal and a fixing bracket according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a portion a of a fixing bracket according to an embodiment of the present application;

fig. 5 is a schematic three-dimensional structure diagram of a connection terminal according to an embodiment of the present disclosure;

fig. 6 is a schematic three-dimensional structure diagram (one) of a connection terminal according to another embodiment of the present application;

fig. 7 is a schematic three-dimensional structure diagram of a contact portion of a connection terminal according to another embodiment of the present application;

fig. 8 is a schematic three-dimensional structure diagram (ii) of a connection terminal according to another embodiment of the present application;

fig. 9 is a schematic view of a bottom case structure of a battery pack according to another embodiment of the present application;

fig. 10 is an assembled side view of a battery pack provided in another embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The present application provides a battery pack, and referring to fig. 1, a schematic view of a partial structure of the battery pack is shown, in this embodiment, the battery pack 1000 includes: circuit board 200 and electric core assembly 400. The battery core assembly 400 may include a plurality of battery cells 410, and the battery cells 410 may further include tabs 420. In addition, referring to fig. 2 and fig. 3, the battery pack 1000 further includes a connection terminal 100, where the connection terminal 100 is used to sample the battery pack to collect data such as voltage and temperature of the battery cell. The connection terminal 100 includes: the battery pack includes a contact portion 110, a welding portion 130, and a connecting portion 120 connecting the contact portion 110 and the welding portion 130, wherein the contact portion 110 contacts and electrically connects a tab 420 of a battery cell 410, and the welding portion 130 is welded and electrically connected to a circuit board 200. Therefore, the circuit board 200 may be electrically connected to the tab 420 of the battery cell 410 through the connection terminal 100, so as to acquire battery cell data.

In addition, the battery pack 1000 further includes a fixing bracket 300, the fixing bracket 300 may be made of an insulating material or formed by surface insulation coating, and one side of the fixing bracket 300 may be further provided with a receiving groove 310.

In the embodiment, the connecting terminals of the sampling line and the sampling sheet adopted in the prior art are replaced by the connecting terminals, so that the wireless welding process is realized in the production process, and the process is simple, the cost is low, and the safety is high.

Another embodiment of the present application provides a battery pack, and a partial structural schematic view of the battery pack may be seen in fig. 1. In the present embodiment, the battery pack 1000 includes: circuit board 200 and electric core assembly 400. The battery core assembly 400 may include a plurality of battery cells 410, and the battery cells 410 may further include tabs 420, where the battery cells of the battery core assembly 400 may be stacked in a thickness direction of the battery cells.

Referring to fig. 2, the battery pack 1000 further includes a fixing bracket 300, the fixing bracket 300 may be made of an insulating material or may be formed by surface insulation coating, one side of the fixing bracket 300 may further be provided with a receiving groove 310, a flange portion 311 is disposed in the receiving groove 310, and the flange portion 311 is used for fixedly connecting with other components. Referring to fig. 2, the fixing bracket 300 may further be provided with a first partition structure 320 on a side wall facing the core assembly 400, and a second partition structure 330, wherein, referring to fig. 3, the first partition structure may include a plurality of partitions 321, 322, etc. Referring to fig. 4 again, as a detailed structure diagram of the second partition structure, as shown in the figure, the plurality of

partitions

331 and 332 of the second partition structure 330 may be disposed at intervals from the receiving slot 310, that is: the plurality of

partitions

331 and 332 of the second partition structure 330 may be used as groove walls of the receiving groove 310 to form the receiving groove 310, and a flange portion 311 may be provided in the receiving groove 310, and the flange portion 311 may be used to connect or fix other structures of the battery pack 1000.

In addition, referring to fig. 5, the battery pack 1000 further includes a connection terminal 100, where the connection terminal 100 is made of a conductive material, and is used to sample the battery cell 410 of the battery pack 1000 so as to collect data such as voltage and temperature of the battery cell 410. As shown in fig. 5, the connection terminal 100 may include: a contact portion 110, a welding portion 130, and a connecting portion 120 connecting the contact portion 110 and the welding portion 130. Referring to fig. 1, the contact portion 110 may be electrically connected by contacting a tab 420 of a certain electric core 410 of the electric core assembly 400, in other embodiments, the contact portion 110 may also be electrically connected with the tab 420 of the electric core 410 by using various connection manners such as welding, conductive adhesive adhesion, and the like, and the specific manner is not limited in this place. As shown in fig. 1, the soldering portion 130 may be soldered to the circuit board 200 to achieve electrical connection, and the soldering may employ various soldering processes such as Surface Mount Technology (SMT). After the two ends of the connection terminal 100 are electrically connected to the tab 420 of the battery cell 410 and the circuit board 200, the circuit board 200 can be electrically connected to the tab 420 of the battery cell 410 through the connection terminal 100, so as to collect data of the battery cell 410, thereby implementing the sampling function of the connection terminal.

In this embodiment, referring to fig. 1, the contact portion 110 of the connection terminal 100 may be disposed along a first direction, and the connection portion 120 of the connection terminal 100 may be disposed along the cell stacking direction, in which case, the first direction is perpendicular to the cell stacking direction, and the contact portion 110 and the connection portion 120 of the connection terminal 100 may form an L-shaped structure.

In the present embodiment, referring to fig. 1 and 5, in the battery pack 1000, the contact portion 110 of the connection terminal 100 may further be provided with a protrusion 111, and the protrusion 111 of the contact portion 110 may be disposed toward the tab 420 of the battery cell 410 of the battery cell assembly 400, and the protrusion 111 may contact the tab 420 to be electrically connected to the tab 420. Referring to fig. 6, the contact portion 110 of the connection terminal 100 may further include an elastic portion 112, and the protrusion 111 may be disposed at the elastic portion 112. Referring to fig. 7, the elastic portion 112 may include two

sub-elastic portions

112a and 112b, and referring to fig. 1 again, the two

sub-elastic portions

112a and 112b may be in contact connection with the tab 420 of the battery cell 410, so that the contact portion 110 may be appropriately deformed during the contact connection, and the contact is more reliable.

In this embodiment, referring to fig. 3, the connection portion 120 of the connection terminal 100 may be accommodated in the accommodation groove 310 of the fixing bracket 300, and the plurality of

partition portions

331 and 332 of the second partition structure 330 may partition the connection portions 120 of the plurality of connection terminals 100, and when the fixing bracket 300 is made of an insulating material or the surface of the groove wall of the accommodation groove 310 is coated with an insulating material, the connection portions 120 of the plurality of connection terminals 100 of the battery pack 1000 may be isolated by the second partition 330, so as to prevent short circuit between the connection terminals 100, and further ensure the implementation of the sampling function of the connection terminals 100. In addition, in the embodiment, the connection portion 120 of the connection terminal 100 may further include a fixing portion 121, the fixing portion 121 may be configured to be fixedly connected to the fixing bracket 300, and in an implementation manner of the reconnection, the fixing portion 121 may include a hook portion, and as described above, the flange portion 311 may be disposed in the receiving slot 310 of the fixing bracket 300, and the flange portion 311 may be mutually buckled with the hook portion of the fixing portion 121 of the connection terminal 100, so as to achieve the fixed connection between the connection terminal 100 and the fixing bracket. In this embodiment, the contact portion 110 of the connection terminal 100 of the battery pack 1000 may further include a bayonet 113, and an opening of the contact portion 110 may be further disposed on a wall of the receiving groove 310 of the fixing bracket 300, and referring to fig. 3, the bayonet 113 of the contact portion 110 of the connection terminal 100 may be capable of being snapped with the opening of the receiving groove 310, so as to more reliably fix the connection terminal 100 to the fixing bracket 300. Of course, the connection terminal 100 of the battery pack 1000 and the fixing bracket 300 may be fixed by various methods such as welding, gluing, etc., which are merely exemplary,

in the present embodiment, referring to fig. 1, the battery pack 1000 further includes a circuit board 200, and the circuit board 200 may be disposed along the cell stacking direction, and the circuit board may be disposed on the upper side of the cell assembly 400 in the view of fig. 1, and may of course be disposed below the cell assembly 400, and even in some cases, the circuit board 200 may be disposed on the end side of the cell assembly 400, which is not particularly limited herein.

Referring to fig. 9, the battery pack 1000 may further include a bottom case 500, the bottom case 500 may be configured to receive the fixing bracket 300 and the battery cell assembly 400, a limit buckle 510 may be further disposed at an edge inside the bottom case 500, the limit buckle 510 may be configured to mount and fix the fixing bracket 300, the fixing bracket 300 is mounted and fixed with the connection terminal 100 through the groove 310 and the flange 320, and the fixing bracket 300 may be limited to enable the protrusion 111 of the contact portion 110 of the connection terminal 100 to contact with the tab 420 of the battery cell 410, so as to achieve reliable electrical connection.

In this embodiment, referring to fig. 10, the battery pack 1000 may further include a filling member 600, the filling member 600 may be disposed at both ends of the cell assembly 400 opposite to the tabs 420 of the battery cells 410, and the filling member 600 may be disposed between the cell assembly 400 and the wall of the bottom case 500, and the filling member 600 is in a compressed state after the installation is completed, so that the cell assembly 400 is forced to compress the contact portions 110 of the connection terminals 100, and thus the connection terminals 100 are in closer contact with the tabs 420, and the electrical connection is more reliable. In addition, inclined surfaces may be further provided at the upper opening edge of the bottom case 500 of the battery pack 1000 and the bottom of the filling member 600, thereby facilitating the assembly and installation of the battery pack 1000.

In this embodiment, structure refinement is performed on the connecting terminal and the fixing bracket in the above embodiments, so that the installation convenience and the installation reliability of the connecting terminal are improved, the installation reliability of the device can be further improved, and the product quality is improved.

Although the application has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. This application is intended to embrace all such modifications and variations and is limited only by the scope of the appended claims. In particular regard to the various functions performed by the above described components, the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the specification. In addition, while a particular feature of the specification may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for a given or particular application. Furthermore, to the extent that the terms "includes," has, "" contains, "or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term" comprising. Further, it is understood that reference to "a plurality" herein means two or more. For the steps mentioned herein, the numerical suffixes are merely used for clearly expressing the embodiments, and for easy understanding, the order of execution of the steps is not fully represented, and the logical relationship should be set as consideration.

The above-mentioned embodiments are only examples of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent flow transformations made by the contents of the specification and the drawings, such as the combination of technical features between the embodiments and the direct or indirect application to other related technical fields, are also included in the scope of the present application.

Claims

1. A battery pack, comprising:

a circuit board;

characterized in that, the group battery still includes a plurality of connecting terminal, and every connecting terminal includes:

2. The battery pack according to claim 1, wherein the plurality of cells are stacked in a thickness direction of the cells; the contact part of connecting terminal sets up along first direction, connecting terminal's connecting portion are followed the direction setting is piled up to electric core, first direction perpendicular to the direction is piled up to electric core, contact part and connecting portion form L type structure.

3. The battery pack according to claim 1, wherein the contact portion is provided with a protrusion disposed toward the tab, the protrusion contacting and electrically connecting the tab.

4. The battery pack according to claim 3, wherein the contact portion includes an elastic portion, and the convex portion is provided to the elastic portion.

5. The battery pack according to claim 1, wherein the fixing bracket is provided with a receiving groove toward a side wall of the cell module, and the connection portion of the connection terminal is fixed in the receiving groove.

6. The battery pack according to claim 5, wherein the connecting portion includes a fixing portion fixedly connected to the fixing bracket, the fixing portion includes a hook portion, a flange portion is disposed in the receiving groove, and the flange portion and the hook portion are fastened to each other.

7. The battery pack of claim 1, wherein the fixing bracket is provided with a first partition structure toward a side wall of the electric core assembly, the first partition structure isolating the contact portions from each other.

8. The battery pack according to claim 7, wherein the fixing bracket is provided with a second partition structure at a side wall thereof facing the cell assembly, the second partition structure separating the connection parts from each other.

9. The battery pack according to any one of claims 1 to 8, wherein the circuit board is disposed in the cell stacking direction.

10. The battery pack according to claim 1 or 8, further comprising a bottom case receiving the fixing bracket and the battery cell assembly, wherein a stopper catch for mounting and fixing the fixing bracket is provided at an inner edge of the bottom case.

11. The battery pack according to claim 10, further comprising a packing member disposed at both ends of the cell assembly opposite to the tabs, the packing member being disposed between the cell assembly and the wall of the bottom case, the packing member being in a compressed state.