Signal sampling device, battery management system and battery pack

Abstract

The invention relates to a battery, particularly provides a signal sampling device, a battery management system and a battery pack, and aims to solve the problem of high cost of a sampling device in an existing battery pack. In order to achieve the purpose, the signal sampling device comprises a first plate, a second plate and a sampling terminal, the first plate is provided with a sampling chip electrically connected with the first plate, and the second plate is electrically connected with the first plate through a transmission line; the first end of the sampling terminal is electrically connected with the battery core, and the second end is electrically connected with the first plate or the second plate; wherein the state information of the battery cell is transmitted to the sampling chip through the sampling terminal, the second plate and the first plate, or is transmitted to the sampling chip through the sampling terminal and the first plate. The circuit board is divided into the first board and the second board, so that the length of a single circuit board can be effectively reduced. Therefore, the state information of the battery cell connected with the second plate can be transmitted to the first plate through the transmission line, so that the efficiency of the sampling chips is exerted to the maximum, the use number of the sampling chips is reduced, and the cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and specifically provides a signal sampling device, a battery management system and a battery pack. Background Art

[0002] At present, electric vehicles have become the key direction of future vehicle development. Battery packs are an important component of electric vehicles, and the management of battery packs is achieved through battery management systems.

[0003] The battery pack includes multiple battery groups, each of which includes multiple cells. The cells are connected in series and parallel to each other, so that the battery pack has a stable voltage. The battery management system includes multiple battery monitoring units, and each battery group is equipped with a battery monitoring unit to monitor the status information of the cells. The status information of the cells includes but is not limited to voltage. The status information of the battery cells monitored by the battery monitoring unit is uploaded through the bus for analysis by the battery management system to comprehensively manage the battery pack.

[0004] The battery monitoring unit includes a sampling device, which includes a circuit board, an analog sampling terminal AFE (AnalogFront End) and a sampling terminal. The two ends of the sampling terminal are connected to the battery cell and the circuit board respectively, and the analog sampling terminal is connected to the circuit board. The analog sampling terminal can convert the collected analog signal of the battery cell into a digital signal and upload it.

[0005] At present, the circuit board of the sampling device often uses PCB (Printed Circuit Board) to reduce costs. For battery packs using cylindrical cells, the spacing between the cylindrical cells is larger. Compared with other types of cells (such as square cells), when collecting status information of the same number of cells, the length of the PCB circuit board required in the sampling device used by the cylindrical cells is longer. In addition, the longer the PCB circuit board, the easier it is for its internal stress to concentrate, thus affecting the performance of the PCB circuit board. If FPC (Flexible Printed Circuit) is used as the circuit board, the cost is higher.

[0006] Therefore, there is an urgent need for a signal sampling device, a battery management system and a battery pack to solve the problem of high cost of the sampling device in the existing battery pack using cylindrical cells. Summary of the invention

[0007] The present invention aims to solve the above technical problem, that is, to solve the problem of high cost of sampling devices in existing battery packs.

[0008] In a first aspect, the present invention provides a signal sampling device, comprising: a first board, on which a sampling chip electrically connected to the first board is disposed; a second board, electrically connected to the first board via a transmission line; a sampling terminal, a first end of the sampling terminal being electrically connected to a battery cell, and a second end of the sampling terminal being electrically connected to the first board or the second board; wherein status information of the battery cell is transmitted to the sampling chip via the sampling terminal, the second board and the first board, or transmitted to the sampling chip via the sampling terminal and the first board.

[0009] In a specific implementation of the above signal sampling device, the number of the sampling terminals connected to the first board and the second board is equal to the number of sampling channels of the sampling chip.

[0010] In a specific implementation of the above signal sampling device, the sampling terminal is a nickel sheet, a wiring harness or a flexible circuit.

[0011] In a specific implementation of the above signal sampling device, the first board is a printed circuit board or a flexible circuit board; and / or the second board is a printed circuit board or a flexible circuit board.

[0012] In a specific implementation of the above signal sampling device, the transmission line includes a connector and a connecting line, a first end of the connecting line is electrically connected to the connector, and a second end of the connecting line is electrically connected to the first board or the second board.

[0013] In a specific implementation of the above-mentioned signal sampling device, the signal sampling device is used to collect status information of battery cells in a battery pack, a side panel is provided on the side of the battery pack, the battery cells are located on a first side of the side panel, and the first panel and the second panel are located on a second side of the side panel.

[0014] In a specific embodiment of the above-mentioned signal sampling device, the signal sampling device also includes a temperature sampling component, which is welded or plugged into the first plate and / or the second plate, and one end of the temperature sampling component facing away from the first plate and / or the second plate is toward the battery cell.

[0015] In a specific embodiment of the above signal sampling device, the side plate is provided with a through hole, and one end of the temperature sampling member facing away from the first plate and / or the second plate passes through the through hole and is attached to the battery cell.

[0016] In a specific implementation of the above signal sampling device, the side plate is provided with a through hole, the through hole is filled with a heat conductive material, and the temperature sampling member is in contact with the heat conductive material.

[0017] In a second aspect, the present invention provides a battery management system, comprising: a battery management controller; and the above-mentioned signal sampling device, wherein the signal sampling device is electrically connected to the battery management controller.

[0018] In a third aspect, the present invention provides a battery pack, comprising the above-mentioned signal sampling device

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The signal sampling device provided by the present invention includes a first board, a second board and a sampling terminal. A sampling chip electrically connected to the first board is provided on the first board, and the second board is electrically connected to the first board through a transmission line; the first end of the sampling terminal is electrically connected to the battery cell, and the second end of the sampling terminal is electrically connected to the first board or the second board; wherein the state information of the battery cell is transmitted to the sampling chip through the sampling terminal, the second board and the first board, or, is transmitted to the sampling chip through the sampling terminal and the first board. By dividing the circuit board into the first board and the second board, the length of a single circuit board can be effectively reduced. At the same time, the second board serves as an extension of the first board, and the state information of the battery cell connected to the second board can be transmitted to the first board via the transmission line, so that the number of sampling terminals connected to the first board and the second board is as equal as possible to the number of sampling channels of the sampling chip, so that the efficiency of the sampling chip is maximized, thereby reducing the number of sampling chips used to save costs.

[0021] Furthermore, the sampling terminal is a nickel sheet, which can further reduce the production cost of the sampling device.

[0022] Furthermore, the first board and the second board are both printed circuit boards. First, the cost of printed circuit boards is low; second, when the sampling terminal uses a nickel sheet, the connection between the sampling terminal and the first board and the second board is simpler and more reliable, and the cost is low; finally, when the second board uses a printed circuit board, the sampling chip can be directly welded, which is low in cost.

[0023] Furthermore, the transmission line includes a connector and a connecting wire, and at least one end of a part of the connecting wire is electrically connected to the connector, and the other end is electrically connected to the first board or the second board, which helps to further reduce the cost of the sampling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0025] Figure 1 It is the way the cells of the battery pack are connected in parallel;

[0026] Figure 2 It is the way the cells of the battery pack are connected in series;

[0027] Figure 3 It is a structural schematic diagram of a signal sampling device in the known technology;

[0028] Figure 4 is a structural diagram of an example of a signal sampling device provided by the present invention;

[0029] Figure 5 is a structural diagram of another example of the signal sampling device provided by the present invention;

[0030] Figure 6 is a structural diagram of another example of a signal sampling device provided by the present invention;

[0031] Figure 7 is a schematic structural diagram of a battery pack provided by the present invention;

[0032] Figure 8 It is an example of the temperature sampling component in the battery pack provided by the present invention.

[0033] Description of reference numerals:

[0034] 1. Battery cell; 2. Circuit board; 3. Bus; 4. First board; 5. Second board; 6. Sampling chip; 7. Sampling terminal; 8. Transmission line; 9. Daisy chain; 10. Side panel; 101. Positioning hole; 102. Through hole; 11. Temperature sampling piece; 12. Fixing shell; 13. Bottom plate; 21. Positioning piece. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0036] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Figure 1It is the method of connecting the cells of a battery pack in parallel. Figure 2 It is the way the battery cells are connected in series.

[0039] like Figure 1 and Figure 2 As shown, for a battery pack adopting a CTP (Cell to Pack) structure, the battery pack includes multiple battery groups, and each battery group includes multiple battery cells 1. Multiple battery cells 1 in a single battery pack are first connected in parallel to form a parallel segment, and the multiple parallel segments are then connected in series, so that the battery pack has a stable voltage. A bus 3 is set between adjacent parallel segments of battery cells 1 in the battery pack, and the first end of the bus 3 is connected to the positive electrode of a battery cell 1, and the second end of the bus 3 is connected to the negative electrode of the adjacent battery cell 1. Through multiple bus bars 3, the parallel segments of multiple battery cells 1 can be connected in series. Taking a cylindrical battery cell as an example, assuming that the voltage of the cylindrical battery cell is 3.7V, the voltage of each parallel segment is 3.7V. If the number of parallel segments connected in series in the battery pack is 33, the voltage of the battery pack is 122.1V. The more parallel segments are connected in series in the battery pack, the greater the voltage of the battery pack.

[0040] The battery management system includes a battery management controller and multiple battery monitoring units. Each battery pack is equipped with a battery monitoring unit to monitor the status information of the battery cell 1. The status information of the battery cell 1 includes but is not limited to voltage, temperature, current, etc. The status information of the battery cell monitored by the battery monitoring unit is uploaded to the battery management controller through the bus for processing and analysis, and the battery pack is comprehensively managed. Specifically, each battery pack is equipped with a battery monitoring unit (CSC), and several CSCs form a slave battery management unit (SBMU). According to the needs of energy storage capacity, an appropriate number of SBMUs form a master battery management unit (MBMU), and are equipped with other required modules such as local monitoring system, high voltage detection and insulation monitoring modules. These modules together constitute a battery management system (BMS).

[0041] Figure 3 It is a structural schematic diagram of a signal sampling device in the known technology.

[0042] like Figure 3As shown, the battery monitoring unit includes a signal sampling device, which includes a circuit board 2, a sampling chip 6 and a sampling terminal 7. The sampling chip 6 is connected to the circuit board 2, generally by soldering. The first end of the sampling terminal 7 is connected to the circuit board 2, and the second end is connected to the bus 3 between the two battery cells 1. The voltage signal on the bus 3 is transmitted to the sampling chip 6 through the sampling terminal 7 and the circuit board 2, and then processed by the sampling chip 6 and uploaded to the battery management controller. The voltage collected by the first end of the sampling terminal 7 is the voltage of a parallel segment of the battery cell 1.

[0043] At present, the main types of battery cells 1 are cylindrical battery cells, square battery cells and long strip battery cells. For battery packs using cylindrical battery cells, the spacing between cylindrical battery cells is large due to the size of the cylindrical battery cells themselves, and the spacing between sampling terminals 7 is large. If the sampling terminals 7 use nickel sheets, the length of the nickel sheets is generally short, and a longer circuit board 2 is required to be electrically connected to multiple nickel sheets.

[0044] The invention provides a signal sampling device.

[0045] Figure 4 It is a structural diagram of an example of the signal sampling device provided by the present invention.

[0046] like Figure 4 As shown, the signal sampling device includes a circuit board, a sampling chip 6, a sampling terminal 7 and a transmission line 8. Among them, the circuit board includes a first board 4 and a second board 5. The sampling chip 6 is arranged on the first board 4 and electrically connected to the first board 4. The sampling chip 6 is specifically connected to the first board 4 by soldering. The first board 4 and the second board 5 are electrically connected through the transmission line 8 to transmit the signal. The sampling terminal 7 includes a plurality of sampling terminals, and each sampling terminal 7 corresponds to a battery cell. By dividing the circuit board into the first board 4 and the second board 5, the length of a single circuit board can be effectively reduced to reduce the internal stress of the first board 4 and the second board 5. Compared with the solution of using a single circuit board for the circuit board in the known technology, the circuit board of the signal sampling device provided by the present invention uses the first board 4 and the second board 5, which has less internal stress, a higher yield rate of the circuit board, and a lower production cost.

[0047] At the same time, the second board 5 is an extension of the first board 4, and the state information of the battery connected to the second board 5 can be transmitted to the first board 4 via the transmission line 8, so that the number of sampling terminals 7 connected to the first board 4 and the second board 5 is as equal as possible to the number of sampling channels of the sampling chip 6, so that the efficiency of the sampling chip 6 is maximized, thereby reducing the number of sampling chips 6 used. Compared with the solution in the known technology that a plurality of circuit boards are provided and each circuit board is provided with a sampling chip 6, in the circuit board of the signal sampling device provided by the present invention, the second board 5 can be used as an extension of the first board 4, so that the number of sampling terminals 7 connected to a single sampling chip 6 is more, and the number of sampling channels of the sampling chip 6 can be fully utilized. When the number of sampling terminals 7 is constant, the signal sampling device provided by the present invention can use fewer sampling chips 6, thereby reducing costs. Of course, in most cases, the number of sampling channels of the sampling chip 6 cannot be fully utilized, and the number of sampling terminals 7 connected to the first board 4 and the second board 5 can be slightly less than the number of sampling channels of the sampling chip 6.

[0048] Each first plate 4 is connected to at least one second plate 5. In the example of the present invention, each first plate 4 is connected to one second plate 5.

[0049] Figure 5 It is a structural diagram of another example of the signal sampling device provided by the present invention.

[0050] like Figure 5 As shown, in another example, one first board 4 is connected to two second boards 5. Of course, this is not a specific limitation of the present invention. Without departing from the principle of the present invention, in other examples, each first board 4 may be connected to more than two second boards 5. Generally speaking, each first board 4 is connected to two second boards 5, and the two second boards 5 are respectively located on both sides of the first board 4, which is conducive to wiring to prevent the lines from crossing each other.

[0051] like Figure 4 As shown, in some examples, the number of sampling chips 6 disposed on the first board 4 is one. This arrangement can easily make the number of sampling terminals 7 connected to the first board 4 and the second board 5 equal to the number of sampling channels of the sampling chip 6.

[0052] like Figure 5 As shown, in another example, the number of sampling chips 6 provided on the first board 4 is at least two. Under the premise that the sampling channels of the sampling chips 6 correspond to the cells one by one, the more cells each first board 4 can collect state parameters, the fewer the number of first boards 4 can be provided. Since the manufacturing process of the first board 4 is relatively complex and its manufacturing cost is relatively high, reducing the number of first boards 4 can further reduce the cost of the signal sampling device.

[0053] Regarding the connection position of the sampling terminal 7, Figure 5 As shown, in some examples, the first board 4 and the second board 5 are both connected to the sampling terminal 7. The first end of the sampling terminal 7 is electrically connected to the battery cell, the end of some sampling terminals 7 away from the battery cell is electrically connected to the first board 4, and the end of another part of the sampling terminals 7 away from the battery cell is connected to the second board 5. The voltage signals of some of the battery cells are sequentially transmitted to the sampling chip 6 through the sampling terminal 7, the second board 5, the transmission line 8 and the first board 4, and the voltage signals of another part of the battery cells are sequentially transmitted to the sampling chip 6 through the sampling terminal 7 and the first board 4.

[0054] Figure 6 It is a structural diagram of another example of a signal sampling device provided by the present invention.

[0055] like Figure 6 As shown, in other examples, the sampling terminal 7 is only connected to the second board 5. One end of the sampling terminal 7 is electrically connected to the battery cell, and the other end is electrically connected to the second board 5. The voltage signal of the battery cell is transmitted to the sampling chip 6 through the sampling terminal 7, the second board 5, the transmission line 8 and the first board 4 in sequence. Since the sampling chip 6 is provided on the first board 4, the circuit will be slightly complicated. Not providing the sampling terminal 7 on the first board 4 can reduce the setting length of the first board 4, so as to further reduce the stress of the first board 4.

[0056] In the example of the present invention, the sampling terminal 7 is a nickel sheet, which can effectively reduce the production cost of the signal sampling device. A welding point is provided on the first plate 4 and / or the second plate 5. One end of the sampling terminal 7 is welded to the first plate 4 and / or the second plate 5 by solder paste, etc., and the other end of the sampling terminal 7 is welded to the busbar by soldering to achieve electrical connection with the battery cell.

[0057] Of course, from a functional point of view, the sampling terminal 7 can also be set as a flexible circuit or wiring harness, or part of the sampling terminal 7 can be set as a nickel sheet, a flexible circuit board or a wiring harness, which should be included in the protection scope of the present invention. The flexible circuit can be a FPC (Flexible Printed Circuit) flexible etching circuit, or a FDC (Flexible Die-cutting Circuit) flexible die-cutting circuit.

[0058] Regarding the materials of the first plate 4 and the second plate 5, in some examples, the first plate 4 and the second plate 5 are both printed circuit boards to reduce the cost of the signal sampling device. When the sampling terminal 7 is made of a nickel sheet, the connection between the sampling terminal 7 and the first plate 4 and the second plate 5 is relatively simple and reliable. At the same time, when the second plate 5 is made of a printed circuit board, the sampling chip 6 can be directly welded.

[0059] In some other examples, the first board 4 is a printed circuit board, and the second board 5 is a flexible circuit board. Due to its own characteristics, the flexible circuit board has less stress and can be set to be longer, so that the second board 5 can be connected to more cells through the sampling terminal 7. When the second board 5 is a flexible circuit board, the sampling terminal 7 can be a lead-out portion from the second board 5. The lead-out portion of the sampling terminal 7 inside the second board 5 can include: copper foil, aluminum foil, copper-nickel strip, aluminum-nickel strip, or nickel strip.

[0060] In some other examples, the first board 4 is a flexible circuit board, and the second board 5 is a flexible circuit board or a printed circuit board. When the first board 4 is a flexible circuit board, the portion of the first board 4 where the sampling chip 6 is arranged needs to be hardened to facilitate welding of the sampling chip 6.

[0061] Regarding the transmission line 8, in some examples, the transmission line 8 includes a connecting line, and both ends of the connecting line are electrically connected to the first board 4 and the second board 5, respectively, which can be specifically plugged or welded. The connecting line can be a wire harness or a flexible circuit board.

[0062] In some other examples, the transmission line 8 includes a connector and at least two connecting wires, the first end of the connecting wire is electrically connected to the connector, and the second end is electrically connected to the first board 4 or the second board 5, so as to establish circuit communication between the first board 4 and the second board 5. The electrical connection can be in the form of welding or plugging. The connecting wire can be a wire harness or a flexible circuit.

[0063] The connector is also called a connector, which includes a plug and a socket, which can be plugged into each other to achieve electrical connection. The plug and the socket are electrically connected to a connecting line respectively, and then the plug and the socket of the connector are plugged into each other to achieve electrical connection of the two connecting lines, thereby establishing circuit communication between the first board 4 and the second board 5.

[0064] In a specific example of the present invention, the sampling chip 6 is an analog sampling terminal AFE (Analog Front End), which is mainly used to convert the analog signal of the collected cell status information into digital information and upload it.

[0065] A daisy chain 9 is also provided between the first board 4 and the second board 5 for communication. The two ends of the daisy chain 9 are electrically connected to the first board 4 and the second board 5 respectively. The purpose of the first board 4 and the second board 5 communicating through the daisy chain 9 is to isolate the mutual interference between the high-voltage side and the low-voltage side. The high-voltage side refers to the voltage signal of the collected battery cell, and the low-voltage side refers to the low-voltage signal processed by the sampling chip 6.

[0066] Figure 7 It is a structural schematic diagram of the battery pack provided by the present invention.

[0067] In some embodiments, the battery pack further includes a fixed shell 12, which includes a bottom plate 13 and a side plate 10, and the side plate 10 is protrudingly disposed on a side surface of the bottom plate 13. All the battery cells 1 are fixedly disposed in the area surrounded by the bottom plate 13 and the side plate 10 to keep the battery cells 1 in a stable state.

[0068] The battery cell 1 is located on the first side of the side plate 10, and the first plate 4 and the second plate 5 are located on the second side of the side plate 10. The side plate 10 is provided with a positioning hole 101, and the sampling device is provided with a positioning member 21, which is connected to the first plate 4 and / or the second plate 5 and then inserted into the positioning hole 101, so as to position or fix the first plate 4 and / or the second plate 5 on the side plate 10.

[0069] In the battery pack, since there is a certain gap between adjacent battery groups, the first plate 4 and the second plate 5 arranged on the outer side of the side plate 10 will not occupy additional space in the battery pack, and will not reduce the energy density of the battery pack. At the same time, there are fewer circuit elements on the outer side of the fixed shell 12, and the possibility of interference with the first plate 4 and the second plate 5 is low. In addition, absorbent cotton and the like are generally provided in the battery pack, and the possibility of the first plate 4 and the second plate 5 being damp is low. Therefore, the first plate 4 and the second plate 5 can be provided in a naked manner (i.e., no protective shell is provided) to further reduce the space occupied by the sampling device. In addition, when the first plate 4 and the second plate 5 are provided on the outer side of the side plate 10, the distance between the first plate 4 and the second plate 5 and the battery cell 1 is relatively close, so that the sampling terminal 7 can be conveniently provided.

[0070] like Figure 7 As shown, in some embodiments, the sampling device also includes a temperature sampling component 11, and the temperature sampling component 11 is electrically connected to the first board 4 and / or the second board 5. Specifically, the temperature sampling component 11 is welded or plugged into the first board 4 and / or the second board 5, or is electrically connected to the first board 4 and / or the second board 5 through a signal line. The temperature sampling component 11 can collect the temperature information of the battery cell 1, and transmit the temperature information to the signal processing chip via the first board 4 and / or the second board 5, and convert the temperature information into digital information. The signal processing chip can be arranged on the first board 4 and / or the second board 5, or it can be arranged on other circuit modules. When the signal processing chip is arranged on the first board 4, it can be a sampling chip 6 or other processing chips.

[0071] In a possible embodiment, the temperature sampling component 11 is of a patch type, and the patch type temperature sampling component 11 is directly welded to the first plate 4 and / or the second plate 5, and the temperature sampling component 11 is attached near the first plate 4 and / or the second plate 5. A through hole 102 is provided on the side plate 10, and the through hole 102 passes through the side plate 10 to connect the battery cell side and the circuit board side. The through hole 102 is filled with a thermally conductive material, such as a thermally conductive adhesive, and the temperature sampling component 11 is in contact with the thermally conductive material. The temperature of the battery cell 1 can be transferred to the patch type temperature sampling component 11 through the thermally conductive material, so that the temperature information of the battery cell 1 collected by the patch type temperature sampling component 11 is more accurate.

[0072] Figure 8 It is an example of the temperature sampling component in the battery pack provided by the present invention.

[0073] In another possible implementation, Figure 8 As shown, the temperature sampling component 11 is of a wiring harness type or a plug-in type. Among them, the wiring harness type temperature sampling component 11 is welded or plugged with the first plate 4 and / or the second plate 5 through a flexible circuit board to achieve electrical connection, and the plug-in type temperature sampling component 11 is plugged with the first plate 4 and / or the second plate 5 through a slot to achieve electrical connection. Both the wiring harness type and the plug-in type temperature sampling component 11 have a certain length. A through hole 102 is provided on the side plate 10, and the through hole 102 passes through the side plate 10 to connect the battery cell side and the circuit board side. The end of the wiring harness type and the plug-in type temperature sampling component 11 facing away from the first plate 4 and / or the second plate 5 passes through the through hole 102 and is attached to the outer surface of the battery cell 1, so as to directly obtain the temperature information of the battery cell 1.

[0074] Based on the above-mentioned signal sampling device, the present invention also provides a battery management system, which includes a battery management controller and the above-mentioned signal sampling device. The signal sampling device is electrically connected to the battery management controller, and can collect and process the status information of the battery cell and upload it to the battery management controller for further processing and analysis, so as to facilitate comprehensive management of the battery pack.

[0075] Based on the above-mentioned signal sampling device, the present invention also provides a battery pack, which includes the above-mentioned battery management system or the above-mentioned signal sampling device. It should be noted that although in the example of the present invention, the signal sampling device is applied to a battery pack adopting a CTP structure, this is not a specific limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, those skilled in the art may also apply the signal sampling device to a battery pack adopting a CTB (Cell to Body) or CTC (Cell to Chassis) structure, which should all be included in the protection scope of the present invention.

[0076] In summary, the working principle of the signal sampling device provided by the present invention is as follows:

[0077] The status information of some cells is transmitted to the sampling chip 6 after passing through the sampling terminal 7, the second board 5, the transmission line 8 and the first board 4 in sequence, and the status information of the other cells is transmitted to the sampling chip 6 through the first board 4. The sampling chip 6 can convert the status information of the cells into digital signals after processing, and upload them to the battery management controller for further processing and analysis, so as to facilitate the comprehensive management of the battery pack. By dividing the circuit board into the first board 4 and the second board 5, the length of a single circuit board can be effectively reduced. At the same time, the second board 5 is an extension of the first board 4, and the status information of the cells connected to the second board 5 can be transmitted to the first board 4 through the transmission line 8, so that the number of sampling terminals 7 connected to the first board 4 and the second board 5 is as equal as possible to the number of sampling channels of the sampling chip 6, so that the efficiency of the sampling chip 6 is maximized, thereby reducing the number of sampling chips 6 used to save costs.

[0078] The relevant user personal information that may be involved in the various embodiments of this application is strictly in accordance with the requirements of laws and regulations, following the principles of legality, legitimacy and necessity, based on the reasonable purposes of business scenarios, to process the personal information that users actively provide during the use of products / services or generated due to the use of products / services, as well as the personal information obtained with the user's authorization.

[0079] The user personal information processed by the applicant will vary depending on the specific product / service scenario, and shall be based on the specific scenario in which the user uses the product / service, which may involve the user's account information, device information, driving information, vehicle information or other related information. The applicant will treat the user's personal information and its processing with a high degree of diligence.

[0080] The Applicant attaches great importance to the security of user personal information and has adopted reasonable and feasible security protection measures that comply with industry standards to protect user information and prevent personal information from being accessed, disclosed, used, modified, damaged or lost without authorization.

[0081] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A signal sampling device, characterized in that: include: A first plate (4), wherein a sampling chip (6) electrically connected thereto is disposed on the first plate (4); A second board (5) electrically connected to the first board (4) via a transmission line (8); A sampling terminal (7), wherein a first end of the sampling terminal (7) is electrically connected to the battery cell (1), and a second end of the sampling terminal (7) is electrically connected to the first plate (4) or the second plate (5); The state information of the battery cell (1) is transmitted to the sampling chip (6) via the sampling terminal (7), the second board (5) and the first board (4), or is transmitted to the sampling chip (6) via the sampling terminal (7) and the first board (4).

2. The signal sampling device according to claim 1, characterized in that: The number of the sampling terminals (7) connected to the first board (4) and the second board (5) is equal to the number of sampling channels of the sampling chip (6).

3. The signal sampling device according to claim 1, characterized in that: The sampling terminal (7) is a nickel sheet, a wiring harness or a flexible circuit.

4. The signal sampling device according to claim 1, characterized in that: The first board (4) is a printed circuit board or a flexible circuit board; and / or, The second board (5) is a printed circuit board or a flexible circuit board.

5. The signal sampling device according to claim 1, characterized in that: The transmission line (8) comprises a connector and a connecting line, wherein a first end of the connecting line is electrically connected to the connector, and a second end of the connecting line is electrically connected to the first board (4) or the second board (5).

6. The signal sampling device according to claim 1, characterized in that: The signal sampling device is used to collect status information of a battery cell (1) in a battery pack; a side plate (10) is provided on a side of the battery pack; the battery cell (1) is located on a first side of the side plate (10); and the first plate (4) and the second plate (5) are located on a second side of the side plate (10).

7. The signal sampling device according to claim 6, characterized in that: The signal sampling device further comprises a temperature sampling component (11), wherein the temperature sampling component (11) is welded or plugged into the first plate (4) and / or the second plate (5), and an end of the temperature sampling component (11) facing away from the first plate (4) and / or the second plate (5) faces the battery cell (1).

8. The signal sampling device according to claim 7, characterized in that: The side plate (10) is provided with a through hole (102), and one end of the temperature sampling component (11) facing away from the first plate (4) and / or the second plate (5) passes through the through hole (102) and is then attached to the battery cell (1).

9. The signal sampling device according to claim 7, characterized in that: The side plate (10) is provided with a through hole (102), the through hole (102) is filled with a heat-conducting material, and the temperature sampling component (11) is in contact with the heat-conducting material.

10. A battery management system, characterized in that: include: Battery management controller; The signal sampling device according to any one of claims 1 to 9, wherein the signal sampling device is electrically connected to the battery management controller.

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