Battery information collector, battery system and power utilization device

Abstract

The utility model discloses a battery information collector, a battery system and an electric device, and the battery information collector comprises one or more telescopic probes which are used for abutting against measurement points to obtain signals; and a circuit board, wherein one or more telescopic probes are arranged on the circuit board. According to the battery information collector, the battery system and the electric device provided by the utility model, one or more telescopic probes are arranged on the circuit board of the battery information collector to abut against the measuring points of the battery cell to obtain the signals of the battery cell, so that the structure is simple, the disassembly and assembly are convenient, and the cost is low. And the telescopic probe can compensate errors of parts caused by processing or assembling, so that the signal acquisition efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery information collector, a battery system and an electric device. Background Art

[0002] The Battery Information Collector (BIC) is an important component of the power battery. Its main functions are voltage sampling, temperature sampling, battery balancing, sampling line abnormality detection, etc.

[0003] Existing battery information collectors usually use nickel sheets to collect signals from power batteries. One end of the nickel sheet is welded to the connecting piece of the battery cell tab, and the other end is welded to the flexible printed circuit board (FPC). The flexible printed circuit board then collects the signal from the nickel sheet and transmits it to the battery information collector. A connector is also required between the battery information collector and the flexible printed circuit board. There are many welding points required, and installation and disassembly are relatively complicated. At the same time, it also occupies a large space inside the battery box. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] The utility model provides a battery information collector, which is characterized by comprising:

[0006] one or more retractable probes for abutting against a measurement point to acquire a signal;

[0007] A circuit board, one or more of the retractable probes are arranged on the circuit board.

[0008] Exemplarily, the retractable probe comprises a needle and an elastic member, the needle is used to abut against the measuring point, the elastic member abuts against the needle and the elastic member is in a compressed state.

[0009] Exemplarily, the retractable probe includes a needle, a needle tube and a spring, the first end of the needle is used to abut the measuring point, the flange portion of the second end of the needle extends from the first end of the needle tube to the needle tube cavity of the needle tube, the spring is in a compressed state in the needle tube cavity, and the two ends of the spring respectively abut the second end of the needle and the second end of the needle tube, when the first end of the needle is subjected to force, the second end of the needle can move toward the second end of the needle tube in the needle tube cavity.

[0010] Exemplarily, when the second end of the needle moves within the needle tube cavity toward the second end of the needle tube, the needle remains in contact with the needle tube.

[0011] Exemplarily, the retractable probe further includes a fixing member, which is disposed at the second end of the needle tube and is used to fix one or more of the retractable probes on the circuit board.

[0012] Exemplarily, the needle includes a turned needle, a flat-tip needle, a pointed needle or a round-tip needle.

[0013] Exemplarily, the battery information collector includes a plurality of the retractable probes, and the plurality of the retractable probes include probes of different types to acquire different types of signals.

[0014] The utility model also provides a battery system, comprising:

[0015] One or more battery cells, each of which is provided with at least one measuring point; and

[0016] A battery information collector according to any one of the above items.

[0017] Exemplarily, the signal includes a voltage signal and / or a temperature signal of the battery cell.

[0018] Exemplarily, when there are multiple battery cells, the battery system further includes a connecting piece, and the connecting piece is used to connect the multiple battery cells in series and / or in parallel.

[0019] Exemplarily, the battery system further includes an insulating bracket, which is disposed between the connecting plate and the battery cell and is used to isolate the connecting plate from the battery cell. The insulating bracket is also provided with a connecting hole, which is used to position and connect the battery cell and the battery information collector.

[0020] Exemplarily, the battery system further includes an insulating bracket, which is arranged between the connecting plate and the battery cell. A battery cell shell is arranged on the surface of the battery cell. The insulating bracket is used to isolate the battery information collector from the battery cell shell. The insulating bracket is also provided with a connecting hole, which is used to position and connect the battery information collector with the battery cell.

[0021] The utility model also provides an electric device, comprising any of the battery systems described above.

[0022] According to the battery information collector, battery system and power-consuming device provided by the utility model, one or more retractable probes are arranged on the circuit board of the battery information collector to abut the measuring points of the battery cells to obtain the signals of the battery cells. The structure is simple and the disassembly and assembly are convenient. The retractable probes can compensate for the errors of the components caused by processing or assembly, and the signal collection efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings of the present invention are used as a part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principle of the present invention.

[0024] In the attached figure:

[0025] Figure 1 It is a structural schematic diagram of a battery information collector according to an embodiment of the utility model;

[0026] Figures 2A-2D is a schematic structural diagram of a retractable probe according to an embodiment of the utility model;

[0027] Figure 3 It is a structural schematic diagram of a battery system according to an embodiment of the utility model;

[0028] Figure 4 It is a side view of a battery system according to an embodiment of the utility model.

[0029] Reference numerals

[0030] 10. Retractable probe

[0031] 11. Needle 12. Syringe

[0032] 13. Spring 14. Fixing parts

[0033] 15. First type probe 16. Second type probe

[0034] 20. Circuit board 21. Connection hole

[0035] 30. Cell 31. First type of measurement point

[0036] 32. Battery cell shell

[0037] 40. Connecting piece 41. Second type measuring point

[0038] 50. Insulation bracket 51. Connection hole

[0039] 60. Connecting screws DETAILED DESCRIPTION

[0040] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0041] In order to thoroughly understand the present invention, a detailed description will be provided in the following description to illustrate the battery information collector, battery system and power device of the present invention. Obviously, the implementation of the present invention is not limited to the specific details familiar to technicians in the field of battery technology. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention can also have other implementations.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0043] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present utility model thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions is exaggerated, and the same reference numerals are used to represent the same elements, and thus their description will be omitted.

[0044] The utility model provides a battery information collector, such as Figure 1 As shown, including:

[0045] One or more retractable probes 10, the retractable probes 10 being used to abut against a measurement point to acquire a signal;

[0046] A circuit board 20 , on which one or more retractable probes 10 are arranged.

[0047] Exemplarily, the retractable probe comprises a needle 11 and an elastic member, the needle is used to abut against the measuring point, the elastic member abuts against the needle and the elastic member is in a compressed state.

[0048] Exemplarily, the retractable probe 10 includes a needle 11, a needle tube 12 and a spring 13. The first end of the needle 11 is used to abut the measuring point, the flange portion of the second end of the needle 11 extends from the opening of the first end of the needle tube 12 to the needle tube cavity of the needle tube, the spring 13 is in a compressed state in the needle tube cavity, and the two ends of the spring 13 respectively abut the second end of the needle 11 and the second end of the needle tube 12. When the first end of the needle 11 is subjected to force, the second end of the needle 11 can move toward the second end of the needle tube 12 in the needle tube cavity.

[0049] Furthermore, the retractable probe 10 further includes a fixing member 14 , which is disposed at the second end of the needle tube 12 . The fixing member 14 is used to fix the retractable probe 10 on the circuit board 20 .

[0050] In one embodiment, Figures 2A-2D As shown, the needle 11 of the retractable probe 10 includes but is not limited to a turned needle, a flat needle, a pointed needle or a round needle. The first end (i.e., the top end) of the needle 11 is used to abut the measuring point, and the second end (i.e., the end) of the needle 11 is a flange. The needle tube 12 of the retractable probe 10 is a structure with an internal cavity, which is called a needle tube cavity. The first end of the needle tube 12 is provided with an opening. The flange of the needle 11 extends from the opening of the first end of the needle tube 12 to the internal cavity of the needle tube 12, and the width of the flange is greater than the width of the opening of the first end of the needle tube 12, so as to ensure that the flange of the needle 11 is always located in the needle tube cavity and cannot be dislodged from the opening of the first end of the needle tube 12.

[0051] In one embodiment, Figures 2A-2D As shown, a spring 13 is provided in the needle tube cavity, and the spring 13 is in a compressed state, and the first end of the spring 13 abuts against the flange portion of the second end of the needle 11. The second end of the needle tube 12 can adopt a sealed design or an open design, and a fixing member 14 is provided at the second end of the needle tube 12. When the second end of the needle tube 12 adopts a sealed design, the second end of the spring 13 abuts against the seal of the second end of the needle tube 12, and a fixing member 14 is provided on the outside of the seal; when the second end of the needle tube 12 adopts an open design, a fixing member 14 is provided at the opening, and the second end of the spring 13 abuts against the fixing member 14. Figure 2A In the example shown, the fixing member 14 is a rubber core bracket, and the protrusion of the rubber core bracket is designed to cooperate with the groove of the second end of the needle tube to fix the rubber core bracket at the second end of the needle tube; Figure 2B-2D In the example shown, the fixing member 14 is of plug-in type or patch type, and is fixed to the second end of the needle tube by welding or bonding.

[0052] In one embodiment, when the top of the needle 11 is subjected to pressure, the pressure is transmitted to the spring 13, causing the spring 13 to be compressed, and the needle 11 moves toward the needle tube 12. Since the positive force is insufficient when the spring is compressed too little, the impedance will be unstable, and when the spring is compressed too much, the tube mouth will be damaged and the pin will be stuck. Therefore, the compression of the spring 13 is usually 1 / 4 to 3 / 4 of the total stroke, preferably 2 / 3, and the total stroke is the length of the needle. In this way, the retractable probe 10 can compensate for the errors caused by processing or assembly of parts, and the signal acquisition efficiency is high.

[0053] In one embodiment, the first end of the needle 11 is used to abut the measuring point, the needle 11 passes through the needle tube 12 and the second end of the needle 11 extends outside the needle tube 12; the needle 11 also passes through the spring 13, that is, the main body of the needle 11 serves as the axis of the spring 13 and penetrates the spring; in addition, in order to keep the spring 13 compressed, a boss for abutting the spring 13 is also provided on the needle 11, and the two ends of the spring 13 respectively abut the boss of the needle 11 and the second end of the needle tube 12.

[0054] Exemplarily, when the second end of the needle moves in the needle tube cavity toward the second end of the needle tube, the needle 11 maintains contact with the needle tube 12 .

[0055] In one embodiment, when the top end of the needle 11 is subjected to pressure and the second end of the needle 11 moves in the needle tube cavity, the needle 11 and the needle tube 12 need to maintain close contact. The width of the middle part of the needle can be made consistent with the width of the opening of the first end of the needle tube, so that the outer surface of the needle is always in contact with the opening of the first end of the needle tube. The width of the flange at the second end of the needle can also be made consistent with the width of the needle tube cavity, so that the flange of the needle is always in contact with the inner wall of the needle tube. When the retractable probe is measuring, the needle and the needle tube are in close contact to ensure the circuit path and achieve the measurement purpose.

[0056] In one embodiment, when the battery information collector is used for voltage sampling, the needle 11 and the needle tube 12 need to be made of conductive materials. Specifically, the needle 11 and the needle tube 12 are made of brass, which has good conductivity, and the overall surface of the retractable probe 10 is nickel-plated with gold to make it corrosion-resistant and oxidation-resistant. The spring 13 can be made of stainless steel, which is not limited here.

[0057] In one embodiment, the needle 11 can also be hollow, and the inner wall of the cavity of the needle 11 is in contact with the connection structure, and is connected to the circuit board 20 through the connection structure. In this case, the needle 11 does not need to be in contact with the needle tube 12, and the connection between the needle 11 and the circuit board 20 can still be achieved. When the battery information collector is used for voltage sampling, the connection structure should also be made of conductive material to establish an electrical connection.

[0058] Exemplarily, one or more of the retractable probes 10 include probes of different types to acquire different types of signals.

[0059] In one embodiment, Figure 1 As shown, the retractable probe 10 may include a first type probe 15 and a second type probe 16, wherein the first type probe 15 and the second type probe 16 may be used to obtain different types of signals, such as voltage signals and temperature signals, respectively. The first type probe 15 and the second type probe 16 may also be used to obtain the same type of signal, but the first type probe 15 and the second type probe 16 have different needle tip lengths, needle tube lengths, and / or spring compression degrees, which are not limited here.

[0060] Exemplarily, the circuit board 20 is made of different components and a variety of complex process technologies, wherein the circuit board 20 has a single-layer, double-layer, or multi-layer structure. The circuit board 20 is also provided with a connection hole 21 for connecting the circuit board 20 to the device being measured.

[0061] In one embodiment, the circuit board 20 may be a printed circuit board (PCB). The printed circuit board is mainly composed of pads, vias, mounting holes, wires, components, connectors, filling, electrical boundaries, etc. The common board layer structures of printed circuit boards include single-layer boards (Single Layer PCB), double-layer boards (Double Layer PCB) and multi-layer boards (Multi Layer PCB). The specific structures include: (1) Single-layer board: a circuit board with only one side coated with copper and the other side without copper. Usually, components are placed on the side without copper, and the copper-coated side is mainly used for wiring and welding; (2) Double-layer board: a circuit board with copper on both sides, usually one side is called the top layer (Top Layer) and the other side is called the bottom layer (Bottom Layer). Generally, the top layer is used as the component placement side, and the bottom layer is used as the component welding side; (3) Multi-layer board: a circuit board containing multiple working layers, in addition to the top layer and the bottom layer, it also contains several middle layers, usually the middle layer can be used as a wire layer, a signal layer, a power layer, a ground layer, etc. The layers are insulated from each other, and the connection between the layers is usually achieved through vias. Among them, the printed circuit board includes many types of working layers, such as signal layer, protective layer, silk screen layer, internal layer, etc., which will not be repeated here.

[0062] In one embodiment, the fixing member 14 fixes and mounts one or more retractable probes 10 on the circuit board 20, including connecting through a probe mounting hole or directly connecting. When the circuit board 20 is provided with a probe mounting hole (not shown), the fixing member 14 of the retractable probe 10 can be installed in the probe mounting hole by interference fit or welding, so that the retractable probe 10 is fixed on the circuit board 20. The circuit board 20 may also not be provided with a probe mounting hole, but the fixing member 14 can be directly welded or bonded to the circuit board 20, which is not limited here.

[0063] According to the battery information collector provided by the utility model, one or more retractable probes are arranged on the circuit board of the battery information collector to abut the measuring point to obtain the signal, thereby replacing the nickel sheet that requires multiple welding and is cumbersome to disassemble and position. The information collector has a simple structure and is easy to disassemble and assemble. The retractable probe can compensate for the errors caused by the processing or assembly of parts, and the signal collection efficiency is high.

[0064] The utility model also provides a battery system, such as Figure 3 and Figure 4 As shown, it includes one or more battery cells 30, each of which is provided with at least one measuring point 31; and the battery information collector as described above.

[0065] Exemplarily, when there are multiple battery cells 30 , the battery system further includes a connecting piece 40 , and the connecting piece 40 is used to connect the multiple battery cells 30 in series and / or in parallel.

[0066] In one embodiment, Figure 3 and Figure 4 As shown, the battery system includes a plurality of battery cells 30, and adjacent battery cells 30 are connected by connecting sheets 40, so that the plurality of battery cells 30 are connected in series to form a battery module. Each battery cell 30 is provided with a measuring point as a first type measuring point 31, so as to obtain the signal of each battery cell 30 and monitor the safety of each battery cell 30 in real time. Specifically, as Figure 4 As shown, the first type of measurement point 31 is set at the center of the boss on the side of the pole ear of each battery cell. By setting only one measurement point on each battery cell 30, the battery information collector can obtain the signal of the battery cell 30. However, in order to enable the battery information collector to obtain a stable signal, or to enable the battery information collector to obtain different types of signals, such as voltage signals and temperature signals, a second type of measurement point can also be set on the battery cell 30 or on the connecting sheet 40. Figure 4 In the example shown, the second type measuring points 41 are arranged on the connecting piece 40 .

[0067] Exemplarily, the battery system further includes an insulating bracket 50, which is disposed between the connecting piece 40 and the battery cell 30. A battery cell shell 32 is disposed on the surface of the battery cell 30. The insulating bracket 50 is used to isolate the battery information collector from the battery cell shell 32. The insulating bracket 50 is also provided with a connecting hole 51, which is used to position and connect the battery information collector to the battery cell 30.

[0068] In one embodiment, Figure 3 As shown, the insulating bracket 50 can be a plastic bracket, and the insulating bracket 50 is used to isolate the connecting pieces 40 and the tabs of the battery cell 30 to prevent short circuit. Figure 4 The insulating bracket 50 is provided with a connection hole 51 for fixing the battery information collector. Specifically, the boss plane where the connection hole 51 is located is about 2 mm higher than the surrounding plane. The connection hole 51 of the insulating bracket 50 cooperates with the connection hole 21 of the circuit board 20, and a fixed connection method such as a connecting screw 60 is used to achieve a fixed connection between the battery cell 30 and the battery board 20 of the battery information collector.

[0069] In one embodiment, the retractable probe 10 can also be used to achieve electrical connection between the battery cell 30 and the battery cell housing 32, wherein the battery cell 31 is usually made of conductive materials such as aluminum. Specifically, at least two retractable probes 10 are respectively connected to the battery cell 30 and the battery cell housing 32, so that the positive / negative poles of the battery cell 30 are electrically connected to the battery cell housing 32 through the retractable probe 10, so that the battery cell housing 32 also carries the corresponding positive / negative electricity. At this time, the needle 11 and the needle tube 12 of the retractable probe 10 also need to be made of conductive materials, which will not be repeated here.

[0070] The purpose of charging the cell shell 32 is to prevent short circuit inside the cell. The electrolyte inside the cell is a conductive liquid. If there are no protective measures, it is easy for the electrolyte to flow between the positive and negative electrodes, thereby causing a short circuit inside the cell. By charging the cell shell 32, when an abnormal short circuit occurs inside the cell, the cell shell can play a fusing role, protect the cell, and avoid thermal runaway. At the same time, charging the aluminum shell of the cell is also beneficial to improving the efficiency and life of the battery.

[0071] According to the battery system provided by the utility model, one or more retractable probes are arranged on the circuit board of the battery information collector to abut the measuring points of the battery cells to directly obtain the signals of the battery cells. There is no need to arrange a flexible circuit board (FPC) and a connector. The battery system has a simple structure and is easy to assemble and disassemble. The retractable probes can compensate for errors caused by processing or assembly of components, and the signal acquisition efficiency is high.

[0072] The utility model also provides an electrical device, comprising the battery system as described above.

[0073] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A battery information collector, characterized in that: include: one or more retractable probes for abutting against a measurement point to acquire a signal; a circuit board on which one or more of the retractable probes are disposed; The retractable probe includes a needle, a needle tube and a spring. The first end of the needle is used to abut the measuring point. The flange portion of the second end of the needle extends from the first end of the needle tube to the needle tube cavity of the needle tube. The spring is in a compressed state in the needle tube cavity. The two ends of the spring respectively abut the second end of the needle and the second end of the needle tube. When the first end of the needle is subjected to force, the second end of the needle can move toward the second end of the needle tube in the needle tube cavity.

2. The battery information collector according to claim 1, characterized in that: When the second end of the needle moves in the needle tube cavity toward the second end of the needle tube, the needle keeps in contact with the needle tube.

3. The battery information collector according to claim 1, characterized in that: The retractable probe further comprises a fixing member, which is arranged at the second end of the needle tube and is used to fix one or more retractable probes on the circuit board.

4. The battery information collector according to claim 1, characterized in that: The needle includes a turned needle, a flat-tip needle, a pointed needle or a round-tip needle.

5. The battery information collector according to claim 1, characterized in that: The battery information collector includes a plurality of the retractable probes, and the plurality of the retractable probes include probes of different types to obtain different types of signals.

6. A battery system, characterized in that: include: One or more battery cells, each of which is provided with at least one measuring point; as well as The battery information collector according to any one of claims 1 to 5.

7. The battery system according to claim 6, characterized in that: The signal includes a voltage signal and / or a temperature signal of the battery cell.

8. The battery system according to claim 7, characterized in that: When there are multiple battery cells, the battery system further includes a connecting piece, and the connecting piece is used to connect the multiple battery cells in series and / or in parallel.

9. The battery system according to claim 8, characterized in that: It also includes an insulating bracket, which is arranged between the connecting piece and the battery cell. A battery cell shell is arranged on the surface of the battery cell. The insulating bracket is used to isolate the battery information collector from the battery cell shell. The insulating bracket is also provided with a connecting hole, which is used to position and connect the battery information collector with the battery cell.

10. An electrical device, characterized in that: A battery system comprising any one of claims 6 to 9.

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