CN215184277U

CN215184277U - Battery pack

Info

Publication number: CN215184277U
Application number: CN202120813839.2U
Authority: CN
Inventors: 吴毅翀; 吴裕锋
Original assignee: Shenzhen Debiao Battery Technology Co ltd
Current assignee: Shenzhen Debiao Battery Technology Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-12-14
Anticipated expiration: 2031-04-20

Abstract

The present application discloses a battery pack, comprising a housing with an installation slot, a bracket arranged in the installation slot, at least one power supply unit mounted on the bracket, and a circuit board electrically connected to the power supply unit; the power supply unit includes a plurality of a cell group, a plurality of first conductor bars, a first conductor plate, a plurality of second conductor bars, and a second conductor plate; each cell group includes a plurality of cells; the power supply unit passes through the first conductor plate and the second conductor plate The conductor plate is electrically connected with the circuit board. The plurality of cells on each cell group use the same first conductor bar and the same second conductor bar to conduct the positive or negative electrodes between the plurality of cells on each cell group. Then, a larger-area first conductor plate is used to conduct multiple first conductor bars, and a larger-area second conductor plate is used to conduct multiple second conductor bars, which can reduce the overall resistance of the power supply unit. This in turn increases the maximum output current of the battery pack.

Description

Battery pack

Technical Field

The application relates to the field of batteries, in particular to a battery pack.

Background

In various electronic devices, such as surfboards, a battery pack is required to be installed to supply power to the device. Usually, inside including a plurality of electric cores of battery package, a plurality of electric cores are connected with the circuit board respectively, but the mode that electric core is connected respectively makes the holistic resistance of battery package great, can't provide great discharge current. In order to improve the discharge of the battery pack, the conventional method is to adopt a conductor sheet to conduct a row of battery cells simultaneously and then electrically connect the battery cells with the circuit board, so that although the resistance of the battery pack can be reduced to a certain extent and the discharge current can be improved to a certain extent, the maximum discharge current still cannot meet the use requirement.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a battery pack, aim at solving prior art, the lower problem of battery pack's maximum discharge current.

To achieve the purpose, the embodiment of the application adopts the following technical scheme:

the battery pack comprises a shell with a mounting groove, a bracket arranged in the mounting groove, at least one power supply unit arranged on the bracket, and a circuit board electrically connected with the power supply unit; the power supply unit comprises a plurality of electric core groups, a plurality of first conductor strips in one-to-one correspondence with the electric core groups, a first conductor plate electrically connected with the first conductor strips at the same time, a plurality of second conductor strips in one-to-one correspondence with the electric core groups, and a second conductor plate electrically connected with the second conductor strips at the same time; each battery core group comprises a plurality of battery cells; each first conductor strip is electrically connected with one end of a plurality of electric cores on each electric core group at the same time; each second conductor strip is simultaneously and electrically connected with the other ends of the electric cores on each electric core group; the power supply unit is electrically connected to the circuit board via the first conductor plate and the second conductor plate.

In one embodiment, each of the first conductor bars is connected to a plurality of the cells of each of the cell groups by spot welding, and each of the second conductor bars is connected to a plurality of the cells of each of the cell groups by spot welding.

In one embodiment, the first conductor plate abuts against a side of the first conductor strip away from the cell, and the second conductor plate abuts against a side of the second conductor strip away from the cell.

In one embodiment, the first conductor plate is provided with a plurality of first yielding holes corresponding to the battery cells one to one, and the second conductor plate is provided with a plurality of second yielding holes corresponding to the battery cells one to one.

In one embodiment, the first conductor plate is connected to the first conductor strip by spot welding, and the second conductor plate is connected to the second conductor strip by spot welding.

In one embodiment, the first conductor strip and the second conductor strip are both nickel strips; the first conductor plate and the second conductor plate are both copper plates.

In one embodiment, a first connecting plate is arranged on the first conductor plate, a first connecting through hole is formed in the first connecting plate, a first connecting threaded hole is formed in the bracket, and a first screw is arranged between the bracket and the first connecting plate; the first screw penetrates through the first connecting through hole and is in threaded connection with the first connecting threaded hole.

In one embodiment, a second connecting plate is arranged on the second conductor plate, a second connecting through hole is formed in the second connecting plate, a second connecting threaded hole is formed in the bracket, and a second screw is arranged between the bracket and the second connecting plate; and the second screw penetrates through the second connecting through hole and is in threaded connection with the second connecting threaded hole.

In one embodiment, the bracket comprises a bottom plate, a top plate, a bottom plug column and a top plug column, wherein the top plate is opposite to the bottom plate and is arranged at an interval; the top plate is provided with a top jack matched with the bottom plug-in column, and the bottom plate is provided with a bottom jack matched with the top plug-in column; the top plate is provided with a plurality of top positioning holes which are in one-to-one correspondence with the battery cores, and the bottom plate is provided with a plurality of bottom positioning holes which are in one-to-one correspondence with the battery cores; one end of the battery cell penetrates through the top positioning hole and is abutted against the first conductor strip; the other end of the battery cell penetrates through the bottom positioning hole and is abutted to the second conductor strip.

In one embodiment, a fixing plate is arranged at the edge of the shell, and a plurality of fixing holes are formed in the fixing plate.

The beneficial effects of the embodiment of the application are as follows: there are a plurality of electric core groups on every power supply unit, and a plurality of electric core groups can adopt the mode that sets up side by side to realize arranging. A plurality of electric cores on every electric core group adopt same first conductor strip and second conductor strip, switch on the positive pole or the negative pole between a plurality of electric cores on every electric core group. And then conducting the plurality of first conductor strips by using a first conductor plate with a larger area, and conducting the plurality of second conductor strips by using a second conductor plate with a larger area. And before all the electric cores on all the electric core groups on the same power supply unit are electrically connected with the circuit board, the conduction is realized through the first conductor plate and the second conductor plate. Compared with the mode that the single electric core or the electric core on the single electric core group is directly connected with the circuit board, the resistance of the whole power supply unit can be reduced, and further the maximum output current of the battery pack is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram illustrating a plurality of power supply units mounted on a rack according to an embodiment of the present disclosure;

fig. 3 is an exploded view of a battery pack in an embodiment of the present application;

in the figure:

1. a housing; 101. mounting grooves; 102. a fixing plate; 1021. a fixing hole; 2. a support; 201. a base plate; 2011. a bottom jack; 2012. a bottom positioning hole; 202. a top plate; 2021. a top jack; 2022. a top positioning hole; 203. inserting columns at the bottom; 204. a top plug-in column; 3. a power supply unit; 301. the electric core group; 3011. an electric core; 302. a first conductor bar; 303. a first conductor plate; 3031. a first abdicating hole; 3032. a first connecting plate; 304. a second conductor bar; 305. a second conductive plate; 3051. a second abdicating hole; 3052. a second connecting plate; 4. a circuit board; 5. a first screw; 6. a second screw.

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.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

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 one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The following detailed description of implementations of the present application is provided in conjunction with specific embodiments.

As shown in fig. 1 to 3, an embodiment of the present application provides a battery pack, which includes a housing 1 having a mounting groove 101, a bracket 2 disposed in the mounting groove 101, at least one power supply unit 3 mounted on the bracket 2, and a circuit board 4 electrically connected to the power supply unit 3; the power supply unit 3 comprises a plurality of electric core groups 301, a plurality of first conductor bars 302 in one-to-one correspondence with the plurality of electric core groups 301, a first conductor plate 303 electrically connected with the plurality of first conductor bars 302 at the same time, a plurality of second conductor bars 304 in one-to-one correspondence with the plurality of electric core groups 301, and a second conductor plate 305 electrically connected with the plurality of second conductor bars 304 at the same time; each battery core group 301 comprises a plurality of battery cells 3011; each first conductor bar 302 is electrically connected with one end of a plurality of electric cores 3011 on each electric core group 301 at the same time; each second conductor bar 304 is electrically connected with the other ends of the plurality of electric cores 3011 on each electric core group 301 at the same time; the power feeding unit 3 is electrically connected to the circuit board 4 via the first conductive plate 303 and the second conductive plate 305.

In the embodiment of the application, the circuit board 4 in the battery pack controls the power supply unit 3 on the bracket 2, so as to supply power outwards. Each power supply unit 3 is provided with a plurality of electric core groups 301, and the plurality of electric core groups 301 can be arranged in a side-by-side manner. The plurality of battery cells 3011 in each battery cell group 301 employ the same first conductor bar 302 and second conductor bar 304 to conduct the positive electrodes or negative electrodes between the plurality of battery cells 3011 in each battery cell group 301. Then, a first conductive plate 303 with a larger area is used to conduct a plurality of first conductive bars 302, and a second conductive plate 305 with a larger area is used to conduct a plurality of second conductive bars 304. All the electric cores 3011 of all the electric core groups 301 in the same power supply unit 3 are electrically connected to the circuit board 4 by the first conductor plate 303 and the second conductor plate 305. Compared with the mode that the single battery cell 3011 or the battery cells 3011 on the single battery cell group 301 are directly connected with the circuit board 4, the overall resistance of the power supply unit 3 can be reduced, and further the maximum output current of the battery pack is increased.

At this moment, the plurality of battery cells 3011 are connected in parallel to form a whole, and compared with an independent mode of the plurality of battery cells 3011, the whole resistance can be effectively reduced, and then the maximum output current of the battery pack can be increased.

Compared with the mode that the single battery cell 3011 or the battery cell 3011 on the single battery cell group 301 is directly connected with the circuit board 4, the number of the conducting wires between the circuit board 4 and the power supply unit 3 can be reduced, and the internal structure of the battery pack is further reduced.

Optionally, the number of the power supply units 3 may be multiple, and the multiple power supply units 3 are distributed on the bracket 2 in an orderly manner, so that a cubic structure may be formed.

Referring to fig. 1-3, as another embodiment of the battery pack provided by the present application, each first conductor strip 302 is connected to a plurality of cells 3011 of each cell pack 301 by spot welding, and each second conductor strip 304 is connected to a plurality of cells 3011 of each cell pack 301 by spot welding. By adopting the spot welding mode, the connection stability between the battery cell 3011 and the first conductor bar 302 and the second conductor bar 304 can be improved, the electrical connection sufficiency is ensured, the resistance of the connection part is small, the overall resistance is reduced, and the higher maximum output current is provided.

Referring to fig. 2 to fig. 3, as another specific embodiment of the battery pack provided by the present application, the first conductor plate 303 abuts against a side of the first conductor bar 302 away from the battery cell 3011, the first conductor plate 303 may contact and electrically connect with the plurality of first conductor bars 302 at the same time in a manner of covering the plurality of first conductor bars 302, the plurality of first conductor bars 302 are located within a boundary of the first conductor plate 303, the first conductor plate 303 may contact with the plurality of first conductor bars 302 better to reduce resistance after electrical connection, the second conductor plate 305 abuts against a side of the second conductor bar 304 away from the battery cell 3011, the second conductor plate 305 may contact and electrically connect with the plurality of second conductor bars 304 at the same time in a manner of covering the plurality of second conductor bars 304, the plurality of second conductor bars 304 are located within a boundary of the second conductor plate 305, and the second conductor plate 305 may contact with the plurality of second conductor bars 304 better, the resistance of the contact after electrical connection is reduced.

Referring to fig. 2 to fig. 3, as another specific embodiment of the battery pack provided by the present application, a plurality of first yielding holes 3031 corresponding to the battery cells 3011 one to one are formed in the first conductor plate 303, so that the electric welding machine can connect the first conductor bar 302 and the battery cells 3011 through the first yielding holes 3031 by spot welding, and a plurality of second yielding holes 3051 corresponding to the battery cells 3011 are formed in the second conductor plate 305, so that the electric welding machine can connect the second conductor bar 304 and the battery cells 3011 through the second yielding holes 3051 by spot welding.

Referring to fig. 2 to 3, as another embodiment of the battery pack provided by the present application, a first conductive plate 303 is connected to a first conductive bar 302 by spot welding, and a second conductive plate 305 is connected to a second conductive bar 304 by spot welding. By adopting the spot welding mode, the connection stability between the first conductor plate 303 and the first conductor strip 302 and between the second conductor plate 305 and the second conductor strip 304 can be improved, the electrical connection sufficiency is ensured, the resistance of the connection part is small, the overall resistance is reduced, and the higher maximum output current is provided.

Referring to fig. 2-3, as another embodiment of the battery pack provided by the present application, the first conductor bar 302 and the second conductor bar 304 are both nickel bars; the first conductive plate 303 and the second conductive plate 305 are both copper plates. The nickel bar spot welding technology is mature, and the nickel bar spot welding technology is not easy to oxidize after being welded with the battery core 3011. The copper plate has good conductivity, and the copper plate is used as a main conductor, so that larger charging and discharging current of the battery pack can be realized.

Referring to fig. 2-3, as another embodiment of the battery pack provided by the present application, a first connecting plate 3032 is disposed on the first conductor plate 303, a first connecting through hole is formed on the first connecting plate 3032, a first connecting threaded hole is formed on the bracket 2, and a first screw 5 is disposed between the bracket 2 and the first connecting plate 3032; the first screw 5 penetrates through the first connecting through hole and is in threaded connection with the first connecting threaded hole. The first connection plate 3032, that is, the first conductor plate 303 is fixed to the bracket 2 by the first screw 5, so that the mounting stability of the first conductor plate 303 is further improved, the first conductor plate is not easy to loosen in use, and a good electrical connection with the first conductor strip 302 is maintained.

Referring to fig. 2 to fig. 3, as another embodiment of the battery pack provided by the present application, a second connecting plate 3052 is disposed on the second conductor plate 305, a second connecting through hole is disposed on the second connecting plate 3052, a second connecting threaded hole is disposed on the bracket 2, and a second screw 6 is disposed between the bracket 2 and the second connecting plate 3052; the second screw 6 penetrates through the second connecting through hole and is in threaded connection with the second connecting threaded hole. The second connection plate 3052, that is, the second conductor plate 305 is fixed to the bracket 2 by the second screw 6, so that the stability of mounting the second conductor plate 305 is further improved, the second conductor plate 305 is not easily loosened in use, and a good electrical connection with the second conductor bar 304 is maintained.

Referring to fig. 2-3, as another embodiment of the battery pack provided by the present application, the bracket 2 includes a bottom plate 201, a top plate 202 opposite to the bottom plate 201 and spaced apart from the bottom plate, a bottom plug-in post 203 disposed on the bottom plate 201, and a top plug-in post 204 disposed on the top plate 202; a top jack 2021 adapted to the bottom plug column 203 is formed on the top plate 202, and a bottom jack 2011 adapted to the top plug column 204 is formed on the bottom plate 201; a plurality of top positioning holes 2022 corresponding to the battery cells 3011 one to one are formed in the top plate 202, and a plurality of bottom positioning holes 2012 corresponding to the battery cells 3011 one to one are formed in the bottom plate 201; one end of the battery cell 3011 penetrates through the top positioning hole 2022 and abuts against the first conductor strip 302; the other end of the battery core 3011 penetrates through the bottom positioning hole 2012 and abuts against the second conductor bar 304. That is, when the bracket 2 fixes the electric core 3011 on the electric core set 301 of the power supply unit 3: one end of the battery cell 3011 is inserted into the top positioning hole 2022, the other end of the battery cell 3011 is inserted into the bottom positioning hole 2012, and after the top plate 202 and the bottom plate 201 of the bracket 2 are connected through the bottom insertion column 203 and the top insertion column 204, the battery cell 3011 can be supported and fixed at both ends, so that the battery cell 3011 of the battery cell set 301 of each power supply unit 3 is fixedly mounted on the bracket 2.

Referring to fig. 2-3, as another embodiment of the battery pack provided by the present application, a fixing plate 102 is disposed at an edge of the housing 1, and a plurality of fixing holes 1021 are formed in the fixing plate 102. When the battery pack is used as a part of other electronic devices, such as the power supply unit 3 of the bodyboard, the battery pack can be integrally mounted on the bodyboard through the fixing holes 1021 on the fixing plate 102 and the fixing members such as screws.

It is to be understood that aspects of the present invention may be practiced otherwise than as specifically described.

It should be understood that the above examples are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A battery pack, characterized in that it comprises a housing with an installation slot, a bracket arranged in the installation slot, at least one power supply unit mounted on the bracket, and a circuit board electrically connected to the power supply unit The power supply unit includes a plurality of cell groups, a plurality of first conductor bars corresponding to the plurality of the cell groups one-to-one, a first conductor plate electrically connected to the plurality of the first conductor bars at the same time, and a plurality of second conductor bars corresponding to a plurality of the cell groups one-to-one, and a second conductor plate electrically connected to the plurality of the second conductor bars at the same time; each of the cell groups includes a plurality of cells; Each of the first conductor bars is electrically connected to one end of a plurality of the cells on each of the cell groups at the same time; each of the second conductor bars is simultaneously connected to a plurality of cells on each of the cell groups. The other ends of each of the battery cells are electrically connected; the power supply unit is electrically connected to the circuit board through the first conductor plate and the second conductor plate.

2 . The battery pack according to claim 1 , wherein each of the first conductor bars is connected to a plurality of the cells on each of the cell groups by spot welding, and each of the first conductors is connected by spot welding. 3 . The two conductor bars are connected to a plurality of the cells on each of the cell groups by spot welding.

3 . The battery pack according to claim 2 , wherein the first conductor plate is in contact with a side of the first conductor bar away from the cell, and the second conductor plate is in contact with the first conductor. 4 . The two conductor strips are in contact with one side away from the battery core.

4 . The battery pack according to claim 3 , wherein the first conductor plate is provided with a plurality of first escape holes corresponding to the cells one-to-one, and the second conductor plate is provided with There are a plurality of second escape holes corresponding to the battery cells one-to-one.

5 . The battery pack according to claim 3 , wherein the first conductor plate and the first conductor bar are connected by spot welding, and the second conductor plate and the second conductor bar are connected by spot welding 5 . connected.

6 . The battery pack according to claim 1 , wherein the first conductor bar and the second conductor bar are both nickel bars; the first conductor plate and the second conductor bar are both nickel bars. 7 . The conductor plates are all copper plates.

7 . The battery pack according to claim 1 , wherein a first connection plate is provided on the first conductor plate, and a first connection through hole is formed on the first connection plate, 8 . The bracket is provided with a first connection threaded hole, and a first screw is arranged between the bracket and the first connection plate; the first screw penetrates the first connection through hole and is connected with the first connection Threaded hole screw connection.

8 . The battery pack according to claim 1 , wherein the second conductor plate is provided with a second connection plate, and the second connection plate is provided with a second connection through hole, The bracket is provided with a second connection threaded hole, and a second screw is arranged between the bracket and the second connection plate; the second screw penetrates the second connection through hole and is connected with the second connection Threaded hole screw connection.

9. The battery pack according to any one of claims 1-5, wherein the bracket comprises a bottom plate, a top plate opposite to the bottom plate and arranged at intervals, a bottom plug-in column disposed on the bottom plate, and The top insertion post is arranged on the top plate; the top plate is provided with a top socket adapted to the bottom insertion post, and the bottom plate is provided with a bottom socket adapted to the top insertion post The top plate is provided with a plurality of top positioning holes corresponding to the battery cores one-to-one, and the bottom plate is provided with a plurality of bottom positioning holes corresponding to the battery cores one-to-one; one end of the battery core penetrates The top positioning hole is in contact with the first conductor bar; the other end of the battery core penetrates the bottom positioning hole and abuts with the second conductor bar.

10 . The battery pack according to claim 1 , wherein a fixing plate is provided on the edge of the casing, and a plurality of fixing holes are opened on the fixing plate. 11 .