Signal acquisition device of battery, battery and electric equipment

Abstract

The utility model relates to a signal acquisition device of a battery, the battery and electric equipment, the signal acquisition device comprises a plurality of circuit boards arranged at intervals along a first direction and a connector arranged at one end of the first direction, and each circuit board is provided with a main body part arranged along a second direction and a lead-out part extending along the first direction; the main body part is used for being connected with a battery cell of the battery, one end of the lead-out part is connected to the main body part, the other end of the lead-out part is connected to the connector, and the first direction is perpendicular to the second direction. In the first direction, a plurality of circuit boards are arranged and are respectively connected with the battery cell connecting sheets of the plurality of columns of battery cells, the number of N columns of battery cells is increased in the first direction, and N circuit boards are correspondingly increased; in the second direction, the main body part extends along the second direction, the battery cell connecting pieces of the plurality of battery cells in the second direction can be connected with the main body part, the width of the circuit board is not limited, and signal acquisition of enough battery cells can be realized.

Description

Technical Field

[0001] The present disclosure relates to the field of batteries, and in particular to a battery signal acquisition device, a battery and an electrical device. Background Art

[0002] The CMU (Cell monitor Unit) is responsible for measuring the voltage, current, temperature and other parameters of the battery cell, and then transmitting them to the BMU (Battery management Unit), which is responsible for evaluating the data transmitted by the CMU. If the data is abnormal, the battery will be protected by requesting to reduce the current or cutting off the charge and discharge path to prevent the battery from exceeding the permitted conditions of use. At the same time, the battery power and temperature are also managed.

[0003] In the related art, the CMU is arranged at the head or tail of the battery pack in the length direction, and the circuit board is connected to the CMU to realize the collection of battery cell voltage and temperature. The circuit board is usually arranged between the battery cell poles. When the battery cell length is arranged along the length direction of the battery pack, the gap between adjacent battery cell poles is very small, and the width of the circuit board is limited. The width of the circuit board is related to the number of collected battery cell voltages. When the width of the circuit board is insufficient, insufficient wiring space may not be able to collect a sufficient number of batteries, and full coverage of the collected signals cannot be achieved, affecting the overall accuracy. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a battery signal acquisition device, a battery and an electrical device.

[0005] According to a first aspect of an embodiment of the present disclosure, a battery signal acquisition device is provided, comprising a plurality of circuit boards arranged at intervals along a first direction and a connector arranged at one end of the first direction, each of the circuit boards having a main body arranged along a second direction and a lead-out portion extending along the first direction, the main body being used to connect to a battery cell, one end of the lead-out portion being connected to the main body, and the other end being connected to the connector, wherein the first direction and the second direction are perpendicular to each other.

[0006] Optionally, the lead-out portions of the plurality of circuit boards are arranged in parallel and / or overlapped and are respectively connected to the plurality of connectors.

[0007] Optionally, each of the circuit boards has at least two connected circuit board units and the lead-out portion connected to one of the circuit board units, wherein the connecting portion connecting the two circuit board units and / or the lead-out portion extend along a first direction and are located in a gap between two adjacent battery cells.

[0008] Optionally, each of the circuit board monomers has a main body extending along the second direction, and a plurality of contact portions are respectively provided on both sides of the main body in the first direction, and the plurality of contact portions are respectively used to connect with electrode terminals of a plurality of the battery cells.

[0009] According to a second aspect of an embodiment of the present disclosure, a battery is provided, including a signal acquisition device of the battery.

[0010] Optionally, the battery further includes a battery monitoring unit, which is disposed at one end where the connector is located and connected to the connector.

[0011] Optionally, the battery includes a plurality of battery cells arranged in sequence, two adjacent battery cells are connected via a battery cell connecting sheet, and the main body is connected to the battery cell connecting sheet to obtain parameter information of the plurality of battery cells.

[0012] Optionally, the battery cell is a rectangular parallelepiped structure, narrow surfaces of the plurality of battery cells are abutted against each other along a first direction, and the main body of the circuit board is located between the positive and negative poles of the battery cell.

[0013] Optionally, wide surfaces of the plurality of battery cells are abutted against each other along the second direction, and the plurality of battery cells continuously arranged in the second direction share the circuit board.

[0014] According to a third aspect of an embodiment of the present disclosure, there is provided an electrical device comprising the above-mentioned battery.

[0015] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: in the signal acquisition device of the battery provided by the present disclosure, in the first direction, by setting multiple circuit boards, the multiple circuit boards are respectively connected to the cell connection pieces of multiple columns of cells, the number of N columns of cells can be increased in the first direction, and N circuit boards can be increased accordingly; in the second direction, the main body extends along the second direction, the cell connection pieces of multiple cells in the second direction can be connected to the main body, the width of the circuit board is not limited, and signal acquisition of enough cells can be achieved. The design of multiple circuit boards can also save manufacturing costs.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0018] Figure 1 The diagram is a schematic structural diagram of a circuit board assembly in a battery signal acquisition device according to an exemplary embodiment.

[0019] Figure 2 is a schematic structural diagram of a battery according to an exemplary embodiment.

[0020] Figure 3 yes Figure 2 A partial enlarged view of part A.

[0021] Figure 4 The figure is a schematic diagram of a battery signal acquisition device according to an exemplary embodiment.

[0022] Figure 5 The figure is a schematic diagram of high-voltage circuit routing of a battery according to an exemplary embodiment.

[0023] Description of Reference Numerals

[0024] 1-circuit board; 10-main body; 100-circuit board monomer; 101-first circuit board monomer; 102-second circuit board monomer; 103-third circuit board monomer; 104-fourth circuit board monomer; 105-fifth circuit board monomer; 106-sixth circuit board monomer; 107-seventh circuit board monomer; 108-eighth circuit board monomer; 11-lead-out portion; 111-first lead-out portion; 112-second lead-out portion; 113-third lead-out portion; 12-connecting portion; 121-first connecting portion; 122-second connecting portion; 123-third connecting portion; 124-fourth connecting portion; 13-contact portion; 2-connector; 21-first connector; 22-second connector; 23-third connector; 24-fourth connector; 31-battery cell; 321, 322-battery cell connecting piece; 33-main positive lead-out piece; 34-main negative lead-out piece; 4-relay; 5-fuse; 6-tray. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0026] In the present disclosure, unless otherwise stated, directional words such as "upper", "lower", "top", and "bottom" are generally defined when the battery provided in the present disclosure is normally installed, and "inner" and "outer" refer to the inside and outside of the corresponding component outline. The terms "first", "second", etc. are used for the purpose of distinguishing different components and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements.

[0027] The battery includes a plurality of cells arranged in sequence. In the related art, the cell is a rectangular parallelepiped structure, having a top surface, a bottom surface, two wide surfaces with larger areas, and two narrow surfaces with smaller areas, where the positive and negative poles are arranged. Usually, the wide surfaces of the plurality of cells are in contact with each other, and the length direction of the cells is arranged along the width direction of the battery. The present disclosure provides a solution in which the length direction of the cells is arranged along the length direction of the battery. When the length direction of the cells is arranged along the length direction of the battery, the gap between the poles of the adjacent cells is very small, the width of the circuit board is insufficient, and a sufficient number of cells cannot be collected.

[0028] In order to solve the above problems, the present disclosure provides a battery signal acquisition device, which includes a circuit board assembly connected between a battery management system and a cell connection sheet, the cell connection sheet is used to connect two adjacent cells 31, and the circuit board assembly is placed on the top surface of multiple cells to obtain parameter information of multiple cells, such as voltage and temperature of the cells 31. Figure 1 As shown, the circuit board assembly includes a plurality of circuit boards 1 arranged at intervals along the first direction and a connector 2 arranged at one end of the first direction, each circuit board 1 has a main body 10 arranged along the second direction and a lead-out portion 11 extending along the first direction, the main body 10 is used to connect with the battery cell connection sheet, one end of the lead-out portion 11 is connected to the main body 10, and the other end is connected to the connector 2 to connect with the battery management system, wherein the first direction and the second direction are perpendicular to each other. Here, the first direction can be the length direction of the battery, and the second direction can be the width direction of the battery. The connector 2 is arranged at one end of the length direction, which can ensure the symmetry of the power battery in the width direction. The circuit board assembly provided by the present disclosure is not limited to the solution in which the length direction of the battery is arranged along the length direction of the battery, but is also applicable to the embodiment in which the length direction of the battery is arranged along the width direction of the battery, that is, the first direction can be the width direction of the battery, and the second direction can be the length direction of the battery. The former will be described in detail below as an example. Of course, the number of circuit boards 1, the connection method between the main body 10 and the battery 31, the size of the main body 10 in the second direction, etc. are not limited and can be designed as needed.

[0029] In the signal acquisition device of the power battery provided by the present disclosure, in the first direction, by setting multiple circuit boards 1, the multiple circuit boards 1 are respectively connected to the cell connection pieces of multiple columns of cells, the number of N columns (N≥1) of cells can be increased in the first direction, and N circuit boards 1 can be increased accordingly; in the second direction, the main body 10 extends along the second direction, the cell connection pieces of multiple cells in the second direction can be connected to the main body 10, and the width of the circuit board 1 is not limited, so that the signal acquisition of enough cells can be realized. The design of multiple circuit boards can also save manufacturing costs.

[0030] In this disclosure, Figure 1 As shown, there can be multiple connectors 2, and the lead-out portions 11 of multiple circuit boards 1 are arranged in parallel and / or overlapped and are respectively connected to multiple connectors 2. The number of connectors 2 can be designed according to the number of lead-out portions 11. In the exemplary embodiment of the present disclosure, four circuit boards 1 are provided along the first direction, wherein the lead-out portions 11 of three circuit boards 1 are arranged in parallel, and the lead-out portion of another circuit board 1 is arranged overlapping with one of the lead-out portions, so it is not shown in the figure. In the present disclosure, any two, three or even more of the lead-out portions 11 of multiple circuit boards 1 can be arranged overlapping, which can reduce the occupied space of the multiple lead-out portions 11.

[0031] A lead-out portion 11 may be designed for each circuit board 1. In the present disclosure, each circuit board 1 has at least two connected circuit board monomers 100 and a lead-out portion 11 connected to one of the circuit board monomers 100, wherein the connection portion 12 and / or the lead-out portion 11 connecting the two circuit board monomers 100 extend along the first direction and are located in the gap between two adjacent battery cells 31. In the first direction, a circuit board monomer 100 may be provided on a column of battery cells 31, and the circuit board monomers 100 of two or more adjacent columns of battery cells 31 may be connected through the connection portion 12. Multiple circuit board monomers 100 may share the same lead-out portion 11, thereby reducing the number of lead-out portions 11 arranged, and correspondingly reducing the number of connectors 2, thereby simplifying the arrangement. In addition, both the connection portion 12 and the lead-out portion 11 extend along the first direction and may be located in the gap between two adjacent battery cells 31 to avoid affecting the electrode welding.

[0032] In order to achieve connection with enough battery cells 31, in the first direction, that is, the length direction of the battery, Figure 2 Taking the embodiment shown as an example, Figure 3As shown, the circuit board monomers 100 of two adjacent columns of cells are connected through the connecting portion 12, the first circuit board monomer 101 and the second circuit board monomer 102 are connected through the first connecting portion 121, and share the first lead-out portion 111, which is connected to the first connector 21; the third circuit board monomer 103 and the fourth circuit board monomer 104 are connected through the second connecting portion 122, and share the second lead-out portion 112, which is connected to the second connector 22; the fifth circuit board monomer 105 and the sixth circuit board monomer 106 are connected through the third connecting portion 123, and share the same lead-out portion (the lead-out portion overlaps with 111, so it is not shown in the figure), which is connected to the third connector 23; the seventh circuit board monomer 107 and the eighth circuit board monomer 108 are connected through the fourth connecting portion 124, and share the third lead-out portion 113, which is connected to the fourth connector 24. Multiple connectors 24 are all connected to the battery management system.

[0033] According to a second aspect of the present disclosure, a battery is provided, the battery comprising the signal acquisition device described above, such as Figures 2 to 4 As shown, the battery includes a plurality of battery cells 31 arranged in sequence, and two adjacent battery cells 31 can be connected in series or in parallel via battery cell connecting sheets 321 and 322. For example, two adjacent battery cells 31 in the second direction can be connected via the battery cell connecting sheet 321, and two adjacent battery cells 31 in the first direction can be connected via 322. The main body 10 of the circuit board 1 is connected to the battery cell connecting sheet to collect parameter information of the plurality of battery cells 31.

[0034] In order to achieve connection with enough battery cells 31, multiple battery cells 31 are arranged in sequence in the second direction, that is, in the width direction of the battery. Each circuit board monomer 100 has a main body 10 extending along the second direction. Both sides of the main body 10 in the first direction are respectively provided with multiple contact portions 13, and the multiple contact portions 13 are respectively used to connect with the battery cell connecting sheet. The contact portion 13 can be a nickel sheet, and the number of the contact portions 13 can be designed according to the number of battery cells 31 in the second direction. The contact portion 13 can be directly connected to the electrode terminal of the battery cell 31, or it can be connected to the battery cell connecting sheet to transmit the collected voltage signal to the connector 2. A temperature sensor is also provided on the contact portion 13, and the temperature information of multiple battery cells 31 can be accurately obtained by connecting with the electrode terminal.

[0035] The narrow surfaces of the plurality of battery cells 31 are in contact with each other along the first direction. The main body 10 of the circuit board 1 and the circuit board monomer 100 are located between the positive and negative poles of the battery cells 31. The space is large enough to accommodate the circuit board without limiting the width of the circuit board.

[0036] The wide surfaces of the plurality of cells are abutted against each other along the second direction, and the plurality of cells continuously arranged in the second direction share the circuit board 1. In this embodiment, as shown in FIG. Figure 4 As shown, eight rows of cells are connected to the main body 10. If conditions permit, multiple rows of cells in the second direction can share the same main body 10, and only the size of the main body 10 in the second direction needs to be adjusted.

[0037] A battery monitoring unit (CMU, not shown in the figure) is provided at one end where the connector 2 is located. The battery monitoring unit is connected to the connector 2, and transmits the acquired voltage and temperature information to the CMU, and then to the BMU. The battery is controlled according to the acquired data, such as reducing the current, cutting off the charge and discharge path, etc., to protect the battery.

[0038] like Figure 4 As shown, the poles of two adjacent cells 31 in the second direction are connected via a cell connection sheet 321, and the main body 10 is connected to the cell connection sheet 321. In the embodiment where eight rows of cells share the same main body 10, only four contact portions 13 are required to be provided on one side of the main body 10.

[0039] Two adjacent battery cells 31 in the first direction are connected through two circuit board monomers 100. In the present disclosure, the poles of two adjacent battery cells 31 in the first direction can be directly connected through the battery cell connecting piece 322. In the embodiment where eight rows of battery cells share the same main body 10, the battery cells in one row are selected to be connected to the battery cells in the adjacent column through the battery cell connecting piece 322, and finally output through the main positive lead-out piece 33 and the main negative lead-out piece 34 to complete the output of high-voltage electric energy of the power battery. The battery cell connecting piece 321 and the battery cell connecting piece 322 can be a jumper aluminum bar, and the main positive lead-out piece 33 and the main negative lead-out piece 34 can be a high-voltage copper-aluminum composite bar, which is not limited in the present disclosure.

[0040] Power batteries have developed a variety of different high-voltage systems, which are divided according to the different working voltages of the motor. In the entire range of 400V~800V, there are battery high-voltage systems with different voltage platforms. Normally, each power battery will only have one voltage, such as a 400V voltage platform or an 800V voltage platform. The traditional 400V voltage platform is limited by hardware capabilities and cannot make the charging power very high. The general charging time is more than 30 minutes. Although the 800V voltage platform can increase the charging power and reduce the charging time to 15 minutes, most of the charging piles on the market are 400V voltage platforms and are not compatible with the 800V voltage platform. It is very inconvenient for daily use. Usually a booster is included with the car to be compatible with most of the 400V charging piles on the market, which adds extra costs.

[0041] In order to solve the above problems, the power battery provided in the present disclosure includes a tray 6 and a plurality of cells placed in the tray 6. Figure 2In the embodiment shown, eight rows and eight columns of cells form a battery module, which shares a circuit board assembly. The figure includes four battery modules arranged in sequence along the second direction. The four battery modules are independent of each other and can be selectively connected as needed to meet the charging requirements of 400V and 800V. In addition, the four battery modules are independent of each other and are arranged symmetrically in the second direction. When thermal runaway occurs on one side, the battery pack can function normally without affecting normal operation, thereby improving thermal runaway protection.

[0042] In addition, the power battery further includes a relay 4 and a fuse 5 arranged at one end of the first direction, and the relay 4 plays the role of automatic adjustment, safety protection, circuit conversion, etc. When a circuit fails or is abnormal, as the current continues to increase, the fuse 5 can cut off the current to protect the safe operation of the circuit.

[0043] According to the third aspect of the present disclosure, there is also provided an electric device, comprising the above-mentioned battery. The electric device may be a vehicle, a drone, etc. The electric device and the battery have all the beneficial effects of the signal acquisition device of the above-mentioned battery, which will not be described in detail here.

[0044] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0045] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery signal acquisition device, characterized in that: It includes a plurality of circuit boards arranged at intervals along a first direction and a connector arranged at one end of the first direction, each of the circuit boards has a main body arranged along a second direction and a lead-out portion extending along the first direction, the main body is used to connect to a battery cell, one end of the lead-out portion is connected to the main body, and the other end is connected to the connector, wherein the first direction and the second direction are perpendicular to each other.

2. The battery signal acquisition device according to claim 1, characterized in that: The lead-out portions of the plurality of circuit boards are arranged in parallel and / or overlapped and are respectively connected to the plurality of connectors.

3. The battery signal acquisition device according to claim 1, characterized in that: Each circuit board has at least two connected circuit board units and the lead-out portion connected to one of the circuit board units, wherein the connecting portion connecting the two circuit board units and / or the lead-out portion extends along a first direction and is located in a gap between two adjacent battery cells.

4. The battery signal acquisition device according to claim 3, characterized in that: Each of the circuit board monomers has a main body extending along the second direction, and a plurality of contact portions are respectively provided on both sides of the main body in the first direction, and the plurality of contact portions are respectively used to connect with electrode terminals of the plurality of battery cells.

5. A battery, characterized in that: A signal acquisition device comprising the battery according to any one of claims 1 to 4.

6. The battery according to claim 5, characterized in that The battery further includes a battery monitoring unit, which is disposed at one end where the connector is located and connected to the connector.

7. The battery according to claim 5, characterized in that The battery includes a plurality of cells arranged in sequence, two adjacent cells are connected via a cell connecting sheet, and the main body is connected to the cell connecting sheet to obtain parameter information of the plurality of cells.

8. The battery according to claim 7, characterized in that The battery cell is a rectangular parallelepiped structure, and narrow surfaces of a plurality of the battery cells are in contact with each other along a first direction. The main body of the circuit board is located between the positive and negative poles of the battery cell.

9. The battery according to claim 8, characterized in that The wide surfaces of the plurality of battery cells are in contact with each other along the second direction, and the plurality of battery cells continuously arranged in the second direction share the circuit board.

10. An electrical device, characterized in that: A battery comprising the battery according to any one of claims 5 to 9.

Images