CN215816282U - Voltage acquisition device, battery pack and electronic equipment - Google Patents

Abstract

The application discloses a voltage acquisition device, a battery pack and electronic equipment, wherein the voltage acquisition device comprises a substrate, a plurality of conducting strips, a plurality of signal wires and a connector, each conducting strip is fixed on the substrate through at least one electric connection point, and each conducting strip is used for realizing series connection or parallel connection between adjacent electric cores in a battery pack; the signal wires are arranged on the substrate, and the signal acquisition end of each signal wire is connected with the corresponding electric connection point of the conducting strip; the connector is arranged on the substrate, and the signal output end of each signal wire is electrically connected with the connector. In this way, the installation process can be simplified, the production efficiency is improved, and the safety is improved.

Description

Voltage acquisition device, battery pack and electronic equipment

Technical Field

The application relates to the technical field of electronic circuits, in particular to a voltage acquisition device, a battery pack and electronic equipment.

Background

At present, in order to collect signals on the battery core, the connection mode of the adopted signal line needs to be nested on the pole of each battery core by the pole connectors of the signal line, then nuts, washers and the like are adopted to fix the pole connectors on the poles, the pole connectors are prevented from falling off from the poles, and the operation is complex.

SUMMERY OF THE UTILITY MODEL

The application provides a voltage acquisition device, battery package and electronic equipment can simplify the installation, improves production efficiency, and promotes the security.

In order to solve the technical problem, the technical scheme adopted by the application is as follows: the voltage acquisition device comprises a substrate, a plurality of conducting strips, a plurality of signal wires and a connector, wherein each conducting strip is fixed on the substrate through at least one electric connection point and is used for realizing series connection or parallel connection between adjacent electric cores in a battery pack; the signal wires are arranged on the substrate, and the signal acquisition end of each signal wire is connected with the corresponding electric connection point of the conducting strip; the connector is arranged on the substrate, and the signal output end of each signal wire is electrically connected with the connector.

In order to solve the technical problem, the technical scheme adopted by the application is as follows: provided is a battery pack including: the battery pack comprises a plurality of battery cells; the voltage acquisition device is arranged on the plurality of electric cores and used for acquiring voltage signals corresponding to acquisition points on the battery pack, and the voltage acquisition device is the voltage acquisition device in the technical scheme.

In order to solve the technical problem, the technical scheme adopted by the application is as follows: the electronic equipment comprises a battery pack, and the battery pack is the battery pack in the technical scheme.

Through the scheme, the beneficial effects of the application are that: the voltage acquisition device comprises a substrate, a plurality of conducting strips, a plurality of signal wires and a connector, wherein each battery cell in the battery pack is fixed on the corresponding conducting strip, then the substrate is fixed above the conducting strips, and each conducting strip can be connected with the corresponding signal wire in the substrate, so that the battery cell is connected with the connector through the conducting strips and the signal wires, and further, signals on the battery cell are transmitted to the connector through the conducting strips and the signal wires, and the signals are acquired; the signal routing wires are fixed on the substrate, the signal routing wires do not need to be arranged, the substrate can be directly buckled on the battery pack, all the signal routing wires can be connected with the corresponding battery cells at one time, and compared with a mode of fixedly connecting the signal routing wires one by one, the method is simple and efficient to operate, the installation process of the signal routing wires is simplified, and the production efficiency is greatly improved; moreover, because the signal wiring is directly fixed on the substrate, the disconnection between the battery cell and the connector caused by external force applied to the wire can be avoided, the abnormal sampling can be avoided, and the sampling safety can be ensured.

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 description of the embodiments are briefly introduced 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 based on these drawings without creative efforts. Wherein:

fig. 1 is a schematic structural diagram of an embodiment of a voltage acquisition device provided in the present application;

fig. 2 is a schematic structural view of a battery pack provided herein;

fig. 3 is a schematic structural diagram of parallel connection of battery cells by using conductive sheets according to the present application;

FIG. 4 is a schematic structural diagram of another embodiment of a voltage acquisition device provided by the present application;

fig. 5 is a schematic structural diagram of a battery cell provided in the present application;

FIG. 6 is a schematic structural diagram of a first side of a voltage acquisition device provided herein;

FIG. 7 is a schematic structural diagram of a second side of the voltage acquisition device provided herein;

fig. 8 is a schematic structural diagram of a conductive sheet provided herein;

fig. 9 is a schematic structural diagram of a battery cell, a conductive sheet, a substrate and a nut provided in the present application;

FIG. 10 is a schematic structural diagram of a voltage acquisition device according to another embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a voltage acquisition device according to still another embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of an embodiment of a battery pack provided herein;

fig. 13 is a schematic structural diagram of an embodiment of an electronic device provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an embodiment of a voltage acquisition device provided in the present application, and fig. 2 is a schematic structural diagram of a battery pack provided in the present application, where the battery pack 20 includes a plurality of battery cells 21, the battery cells 21 can store electric energy, after the battery cells 21 are combined to form a battery pack, the battery pack can supply power to other devices, and the number of the battery cells 21 is two or more.

The voltage collecting device 10 includes a substrate 11, a plurality of conductive sheets 12, a plurality of signal traces 13, and a connector 14.

The substrate 11 is used for carrying the conductive strips 12, the signal traces 13 and the connectors 14 to form a Printed Circuit Board (PCB). The substrate 11 is an insulating plate.

Each conductive sheet 12 is fixed to the substrate 11 through at least one electrical connection point, and each conductive sheet 12 is used for realizing series connection or parallel connection between adjacent battery cells 21 in the battery pack 20. Specifically, the conducting strip 12 is disposed between the substrate 11 and the battery cell 21, the conducting strip 12 may be directly welded on the substrate 11 or fixedly connected with the substrate 11 by other means (e.g., conducting glue), and the conducting strip 12 may be a metal strip (e.g., a copper strip).

The signal traces 13 are disposed on the substrate 11, and a signal collecting end of each signal trace 13 is connected to an electrical connection point of the corresponding conductive sheet 12. The connector 14 is disposed on the substrate 11, and a signal output end of each signal trace 13 is electrically connected to the connector 14. Each signal trace 13 is used for transmitting the voltage signal of the corresponding collection point to the corresponding pin of the connector 14. The connector 14 is a connector having a plurality of pins that can be adapted to connect with corresponding receivers to output the collected signals.

Further, a connection point where the adjacent battery cells 21 are connected in parallel/series through the conductive sheet 12 is referred to as an acquisition point, and the voltage acquisition device 10 can acquire a voltage signal of the acquisition point; the conducting strips 12 correspond to the signal lines 13 one by one, and each conducting strip 12 is connected with the connector 14 through the corresponding signal line 13 so as to collect the voltage signal of the corresponding collection point.

In one embodiment, the conductive sheet 12 may be perforated to form grooves/vias; if the conducting strip 12 is provided with a groove, the battery cell 21 is inserted into the groove to be fixedly connected with the conducting strip 12; or if the conducting strip 12 is provided with a through hole, the battery cell 21 is inserted into the through hole and is fixedly connected with the substrate 11; since the conductive sheet 12 is fixed on the substrate 11 through the electrical connection point and connected to the connector 14 through the corresponding signal trace 13, a signal of the acquisition point corresponding to the battery cell 21 can be transmitted to the connector 14 through the conductive sheet 12 and the corresponding signal trace 13, so as to realize signal acquisition.

It can be understood that other designs may also be performed on the conductive sheet 12, for example, the conductive sheets 12 may be respectively bound with the corresponding battery cells 21, so as to connect at least two battery cells 21 in parallel/in series, which is not limited in this embodiment, as long as the conductive sheet 12 can perform the functions of connecting the battery cells 21 in parallel/in series and connecting the signal traces 13 and the connector 14. In addition, the number of the through holes/grooves on the conductive sheet 12 may be set according to the specific application requirement, and the number may be 2 or more than 2; for example, as shown in fig. 3, the positive electrodes of the battery cells 21a to 21c are connected by the conducting strip 12a, and the negative electrodes of the battery cells 21a to 21c are connected by the conducting strip 12b, that is, the parallel connection of the three battery cells 21a to 21c is realized by the conducting strip 12a and the conducting strip 12 b.

The embodiment provides a new installation scheme of signal routing in a voltage acquisition device, after a corresponding conducting strip is fixed on a battery cell which needs to perform signal acquisition, a substrate is fixed above the conducting strip, and each conducting strip can be connected with the corresponding signal routing, so that the conducting strips are connected to a connector through the corresponding signal routing, signals of acquisition points corresponding to the battery cell are transmitted to the connector through the conducting strips and the signal routing, and voltage signals of the acquisition points are acquired; because the signal wires in the embodiment are directly fixed on the substrate, the process of arranging the signal wires in the traditional scheme is not needed, the operation is simple and efficient, the installation process can be simplified, the automatic production is realized, and the production efficiency is improved; in addition, because signal wiring snap-on is on the base plate, can avoid the wire rod to receive external force and lead to the disconnection between electric core and the connector, and then lead to unable normal completion sampling, be favorable to guaranteeing the security of sampling.

Referring to fig. 2 and fig. 4-11 in combination, fig. 4 is a schematic structural diagram of another embodiment of the voltage acquisition device provided in the present application, in which the voltage acquisition device 10 includes a substrate 11, a plurality of conductive sheets 12, a plurality of signal traces 13, and a connector 14.

As shown in fig. 5, each battery cell 21 includes a terminal post 211 and a battery cell body 212, the terminal post 211 is disposed on the battery cell body 212, and the terminal post 211 includes a positive output post 211a and a negative output post 211 b.

As shown in fig. 6 and 7, the substrate 11 includes a first surface a and a second surface B which are oppositely disposed, the first surface a faces the battery pack 20, and the plurality of conductive sheets 12 are fixed on the first surface a; the connector 14 and the plurality of signal traces 13 are disposed on the second side B.

Further, as shown in fig. 4, the substrate 11 is further provided with a positive electrode lead-out notch 111 and a negative electrode lead-out notch 112 for outputting a power signal provided by the battery pack 20; the positive electrode lead-out notch 111 is arranged corresponding to the positive electrode output pole of the battery pack 20; the negative lead notch 112 is provided corresponding to the negative output pole of the battery pack 20.

The shape of the conductive sheet 12 may be rectangular, and each conductive sheet 12 is fixed on the substrate 11 through the electrical connection point 123; in particular, the electrical connection points 123 may be pads of a pad or a solder pad. As shown in fig. 4, each conductive sheet 12 is provided with at least a first through hole 121 and a second through hole 122, and the middle portions of the first through hole 121 and the second through hole 122 are fixed on the substrate 11 through an electrical connection point 123; the sizes of the first through hole 121 and the second through hole 122 are matched with the size of the pole 211, so that the pole 211 penetrates through the conductive sheet 12 to be connected with the pole 211 of another cell 21, that is, the first through hole 121 and the second through hole 122 on each conductive sheet 12 are used for the poles 211 of two adjacent cells 21 with different polarities to penetrate, so as to realize the series connection between the two adjacent cells 21; or the first through hole 121 and the second through hole 122 on each conducting strip 12 are used for allowing the polar posts 211 with the same polarity of two adjacent battery cells 21 to pass through, so as to implement parallel connection between two adjacent battery cells 21, thereby implementing series connection or parallel connection between two adjacent battery cells 21, and further enabling the signal routing 13 to collect the voltage of the collection point corresponding to the battery cell 21.

In a specific embodiment, in order to fix the substrate 11 and the battery cells 21, as shown in fig. 6, a plurality of fixing holes 113 are formed in the substrate 11, and the voltage collecting device 10 further includes a nut 15, where positions of the fixing holes 113 in the substrate 11 correspond to positions of the through holes in the conducting strips 12 and positions of the poles 211 of the battery cells 21 in the battery pack 20 one by one, so that the substrate 11 can be nested on the poles 211 of the battery cells 21 in the battery pack 20. For convenience of explanation of the fixing holes 113 in fig. 6, the nuts 15 located on the fixing holes 113 are removed and the lower conductive sheets 12 are removed at the same time; to illustrate the relationship between the fixing hole 113 and the size of the through hole on the conductive plate 12, the nut 15 is removed from the position where the conductive plate 12 is marked in fig. 6 and the lower conductive plate 12 is retained. Specifically, the layout of the conducting strip 12 and the arrangement of the fixing hole 113 both correspond to the structure of the battery cell 21, the fixing hole 113 corresponding to the through hole on the conducting strip 12 is arranged on the substrate 11, and after the substrate 11 is arranged, the substrate 11 can be sleeved on the pole 211 of the battery cell 21 through the fixing hole 113 on the substrate 11 and the through hole on the conducting strip 12.

Further, the size of the fixing hole 113 formed in the substrate 11 is larger than that of the through hole formed in the conductive sheet 12, so as to perform spiral fixing; for example, as shown in fig. 6 to 7 and 9, the terminal post 211 of each battery cell 21 passes through the corresponding through hole of the conductive sheet 12 and the fixing hole 113 of the substrate 11, and is screwed with the nut 15, so that the substrate 11 is fixed on the battery pack 20 by the nut 15, thereby stabilizing the electrical connection therebetween and preventing the separation therebetween.

It will be appreciated that other openings or indentations may be provided in the substrate 11 for mounting other devices having a certain height. The electrical connection point 123 and the signal trace 13 can be disposed according to actual needs, and are not limited to the structure shown in fig. 4; the position of the connector 14 can be set according to the wiring requirements, so that the whole design is most convenient.

The embodiment can not only omit the process of wire arrangement, but also can embed all the conducting strips 12 on the battery pack 20 at one time, and the operation is simple and efficient.

In another embodiment, the electrical connection points 123 may be optimized, and a plurality of electrical connection points 123 are used to fix the conductive sheets 12 on the substrate, for example, as shown in fig. 10, the electrical connection points 123 are arranged at four corners of each conductive sheet 12 to be fixed on the substrate 11, and the signal acquisition end of the corresponding signal trace 13 is connected to any one of the electrical connection points 123; taking the electrical connection point 123 as an example of a welding point, since the four welding points of the conductive sheet 12 are all located at the same potential, the voltage signal of the collection point can be led out from any one of the welding points, so that the collection of the voltage signal on the collection point is realized.

In other embodiments, in order to enhance the fixing effect, the screw fixing and the welding fixing may be combined, that is, a fixing hole 113 is formed in the substrate 11, the size of the fixing hole 113 is set to be larger than that of a through hole formed in the conductive sheet 12 to perform the screw fixing, and the four corners of each conductive sheet 12 are provided with electrical connection points 123 to be fixed on the substrate 11.

In another specific embodiment, for convenience of wiring, cross-over processing may be performed, as shown in fig. 11, the plurality of signal traces 13 includes a first type signal trace 131 and a second type signal trace 132, the first type signal trace 131 includes a first sub-signal trace 1311, a second sub-signal trace 1312, and a cross-over conductor 1313, the first sub-signal trace 1311 and the second sub-signal trace 1312 are disposed in a staggered manner and are electrically connected through the cross-over conductor 1313, and a predetermined gap is maintained between at least a partial region of the cross-over conductor 1313 and the substrate 11; the second-type signal trace 132 passes under the cross-over conductor 1313, or the second-type signal trace 132 is disposed at one side of the first-type signal trace 131.

Further, the cross-over conductor 1313 may be a cross-over resistor, which is used to connect the first sub-signal trace 1311 and the corresponding second sub-signal trace 1312, and the side of the cross-over resistor close to the substrate 11 is separated by a predetermined gap, which is used to allow the second type signal trace 132 to pass through the bottom of the cross-over resistor, so that the trace below the cross-over resistor can be normal.

For example, as shown in fig. 11, for convenience of connection, the signal trace connected to the electrical connection point 123a is the first type signal trace 131, the signal trace connected to the electrical connection point 123b is the second type signal trace 132, and the second type signal trace 132 passes through the bottom of the cross-over conductor 1313 and is connected to the upper side of the first type signal trace 131 corresponding to the electrical connection point 123a, so that the position of the second type signal trace 132 is adjusted, thereby facilitating the overall wiring, optimizing the wiring space, and reducing the overall volume.

In the embodiment, the conducting plate is directly fixed on the substrate, and a voltage signal is led out from one electric connection point of the conducting plate, and the pole columns (including the anode output column and the cathode output column) of the battery cells directly penetrate through the through holes on the corresponding conducting plates and are connected with the conducting plates, so that the adjacent battery cells are connected in parallel/in series by the conducting plates, and the voltage of the serial/parallel points is acquired; in addition, fixing the polar columns through the nuts can fix the substrate and the battery pack, the realization is simple, the installation of signal wiring of the battery pack can be simplified, and the production efficiency is improved.

Referring to fig. 12, fig. 12 is a schematic structural diagram of an embodiment of a battery pack provided in the present application, where the battery pack includes: the voltage acquisition device 10 and the battery pack 20, wherein the battery pack 20 comprises a plurality of battery cells 21; the voltage collecting device 10 is disposed on the plurality of battery cells 21, and is configured to collect voltage signals corresponding to collecting points on the battery pack 20, where the voltage collecting device 10 is the voltage collecting device in the foregoing embodiment.

With continued reference to fig. 12, the voltage collecting device 10 includes a connector 14, the battery pack further includes a management system board 30, and a receiver 31 adapted to the connector 14 is disposed on the management system board 30 for receiving the voltage signal.

Further, a management system board 30 is connected to the connector 14, the management system board 30 is configured to receive the voltage signal sent by the connector 14, and determine whether protection of the battery pack 20 is required based on the voltage signal; specifically, the Management System board 30 may be a Battery Management System (BMS) board, and the Management System board 30 may compare a parameter value of the voltage signal with a preset range, and protect the Battery pack 20 when the parameter value of the voltage signal does not fall within the preset range, so that the Battery pack 20 stops operating; when the parameter value of the voltage signal falls within the preset range, the battery pack 20 is not protected, so that the battery pack 20 can normally work to supply power to other devices.

Further, the parameter value may be a temperature value, a current value, a voltage value, or a power value, and the preset range is a safety value that is set in advance according to experience or practical application requirements, and is matched with the parameter value, for example: and if the parameter value is a current value, the preset range is a current safety range. In addition, the BMS board may play a role in overvoltage protection, undervoltage protection, discharge short-circuit protection, discharge overcurrent protection, or high/low temperature protection, as well as in controlling charging and discharging.

Referring to fig. 13, fig. 13 is a schematic structural diagram of an embodiment of an electronic device provided in the present application, where the electronic device 1000 includes a battery pack 100, and the battery pack 100 is the battery pack in the above embodiment.

The application provides a new installation scheme of signal routing in a battery pack, after a corresponding conducting strip is fixed on a battery cell needing signal acquisition, a substrate is fixed above the conducting strip, each conducting strip can be connected with the corresponding signal routing, so that the conducting strips are connected to a connector through the corresponding signal routing, signals on the battery cell are transmitted to a management system board through the conducting strips, the signal routing and the connector, the management system board can determine the current state of the battery cell according to the transmitted voltage signals, determine whether the battery cell needs to be protected or not, and the working safety of a battery pack can be improved; the signal routing is directly realized through the substrate, the process of arranging the signal routing in the traditional scheme is not needed, the operation is simple and efficient, the installation process can be simplified, the automatic production is realized, and the production efficiency is improved; in addition, because signal wiring snap-on is on the base plate, can avoid the wire rod to receive external force and lead to the disconnection between electric core and the connector, and then lead to unable normal completion sampling, be favorable to guaranteeing the security of sampling.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims (10)

1. A voltage acquisition device, comprising:

a substrate;

each conducting strip is fixed on the substrate through at least one electric connection point and is used for realizing series connection or parallel connection between adjacent electric cores in the battery pack;

the signal acquisition end of each signal wire is connected with the corresponding electric connection point of the conducting strip;

the connector is arranged on the substrate, and the signal output end of each signal wiring is electrically connected with the connector.

2. The voltage acquisition device according to claim 1, wherein each conductive sheet is provided with at least a first through hole and a second through hole, and the first through hole and the second through hole on each conductive sheet are used for allowing poles of two adjacent battery cells with different polarities to pass through so as to realize series connection between the two adjacent battery cells; or the first through hole and the second through hole on each conducting strip are used for enabling the polar columns with the same polarity of two adjacent battery cells to penetrate through so as to realize the parallel connection between the two adjacent battery cells.

3. The voltage collecting device of claim 2, wherein the substrate is provided with a plurality of fixing holes; the positions of the fixing holes on the substrate correspond to the positions of the through holes on the conducting strips and the positions of the poles of the battery cells in the battery pack one by one, so that the substrate can be nested on the poles of the battery cells of the battery pack.

4. The voltage acquisition device of claim 3 wherein the substrate comprises first and second oppositely disposed faces; the first face is used for facing the battery pack; the plurality of conducting strips are fixed on the first surface; the connector and the signal wires are arranged on the second surface.

5. The voltage acquisition device according to claim 3, wherein the size of the fixing hole formed in the substrate is larger than that of the through hole formed in the conductive sheet; and/or

Four corners of each conducting strip are provided with electric connecting points to be fixed on the substrate; the signal acquisition end of the corresponding signal routing is connected to any one of the electric connection points.

6. The voltage acquisition device according to claim 2, wherein the substrate is further provided with a positive electrode lead-out notch and a negative electrode lead-out notch; the positive electrode lead-out notch is arranged corresponding to a positive electrode output pole of the battery pack; the negative electrode leading-out notch is arranged corresponding to a negative electrode output pole of the battery pack.

7. The voltage acquisition device of claim 1, wherein the plurality of signal traces comprises a first type of signal trace; the first type signal routing comprises a first sub-signal routing, a second sub-signal routing and a cross-over conductor; the first sub-signal wiring and the second sub-signal wiring are arranged in a staggered mode and are electrically connected through the cross-over connection conductor; a preset gap is kept between at least partial region of the bridging conductor and the substrate.

8. The voltage acquisition device according to claim 7, wherein the signal traces further comprise a second type of signal trace passing under the jumper conductor, or the second type of signal trace is disposed on one side of the first type of signal trace.

9. A battery pack, comprising:

a battery pack including a plurality of cells;

the voltage acquisition device of any one of claims 1 to 8, disposed on the plurality of battery cells, and configured to acquire voltage signals of corresponding acquisition points on the battery pack; and

and the management system board is provided with a receiver matched with the connector and used for receiving the voltage signal.

10. An electronic device characterized by comprising a battery pack, the battery pack being the battery pack according to claim 9.

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