Signal acquisition wire harness of battery assembly and battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to a signal acquisition wire harness of a battery assembly and a battery pack. The signal acquisition wire harness comprises: a receiver; the collection side of the flexible wire harness plate comprises a first collection part which extends along the arrangement direction of the battery cells on the battery row and is connected with the first electrode of each battery cell on the battery row, and a second collection part which extends along the arrangement direction of the battery cells on the battery row and is connected with the second electrode of each battery cell on the battery row; the bending part is positioned at the tail end of the battery row along the arrangement direction of the battery cells on the battery row, and one end of the bending part is connected with the first acquisition part; the second acquisition part is connected with the other end of the bending part; and the second acquisition part extends along the arrangement direction of the battery cells on the battery row and is connected with the second electrode of each battery cell on the battery row. According to the embodiment, the width of the flexible wire harness plate can be directly limited within a certain range, and the situation that the flexible wire harness plate is wide and shields the anti-explosion valve can be prevented. Meanwhile, the length of each flexible wire harness plate is limited, so that poor signal precision is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a signal acquisition harness and battery pack for a battery assembly. Background Technology

[0002] Flexible wiring harnesses, such as FPCs, serve as the transmission carriers for cell signals. They transmit the cell's voltage and temperature signals to the battery management system (BMS) via low-voltage wiring harnesses, thus playing a crucial role in battery packs. During the design phase, the pins of the cell and the FPC connector are matched one-to-one, and the cell also corresponds one-to-one with the BMS connector pins. This correspondence is used to transmit low-voltage signals to the BMS through flexible wiring harnesses.

[0003] Currently, because the flexible wiring harness board needs to avoid the explosion-proof valves on the battery cells when placed on them, it can only collect signals from one side of the battery module when extending along the signal acquisition wiring harness. With a large number of batteries, the flexible wiring harness board collects signals from many cells, resulting in a wider board that can easily obstruct the explosion-proof valves. Furthermore, the relatively long length of the flexible wiring harness board affects signal transmission, leading to lower signal accuracy. Utility Model Content

[0004] In view of this, the present invention provides a signal acquisition harness and battery pack for a battery assembly to solve the problem of poor signal accuracy caused by the flexible harness plate blocking the explosion-proof valve when there are many batteries.

[0005] In a first aspect, this utility model provides a signal acquisition harness for a battery assembly, the signal acquisition harness comprising:

[0006] Receiver, used to output signals from the flexible wire harness board;

[0007] A flexible wire harness board, wherein the signal side of the flexible wire harness board is connected to the receiver, and the acquisition side of the flexible wire harness board is adapted to be connected to the battery pack;

[0008] The acquisition side of the flexible wire harness plate includes:

[0009] The first acquisition unit extends along the arrangement direction of the cells on the battery pack and is connected to the first electrode of each cell on the battery pack.

[0010] The bent portion is located at the end of the battery pack along the arrangement direction of the cells on the battery pack, and one end of the bent portion is connected to the first collection unit.

[0011] The second collection part is connected to the other end of the bent part; the second collection part extends along the arrangement direction of the cells on the battery pack and is connected to the second electrode of each cell on the battery pack; the first electrode and the second electrode have opposite polarities.

[0012] Beneficial Effects: This embodiment involves directly bending the flexible wire harness board, enabling it to acquire signals from the cells on the battery pack. Since the actual width of the flexible wire harness board is related to the number of cells on the battery pack, its width can be directly limited within a certain range. In other words, the flexible wire harness board can only acquire a specified number of cells from one battery pack. Therefore, it prevents the flexible wire harness board from being too wide and obstructing the explosion-proof valve. Simultaneously, specifying the number of cells on the battery pack also limits the length of each flexible wire harness board. When there are many battery packs, multiple signal acquisition harnesses can be used to acquire signals from different battery packs separately. This avoids poor signal accuracy due to the long length of the flexible wire harness board.

[0013] Secondly, this utility model also provides a battery pack, which includes:

[0014] The battery assembly contains multiple battery packs, each of which contains multiple battery rows arranged in sequence. Each battery row consists of multiple cells arranged in the same direction.

[0015] Multiple sets of signal acquisition units, each set of signal acquisition units is connected to each battery pack; each set of signal acquisition units is equipped with multiple signal acquisition harnesses, each signal acquisition harness is connected to each battery pack.

[0016] The signal acquisition harness includes a flexible harness board and a receiver as described in any of the above embodiments;

[0017] The battery management system is connected to the flexible wiring harness board via a receiver.

[0018] Beneficial Effects: This embodiment, by setting up signal acquisition components, allows for the use of multiple signal acquisition harnesses when multiple battery bars are present in each battery pack, enabling separate acquisition of signals from different battery bars. In this embodiment, since the actual width of the flexible harness plate is related to the number of cells on the battery bar, the width of the flexible harness plate can be directly limited within a certain range. That is, the flexible harness plate can only acquire a specified number of cells from one battery bar. Therefore, it prevents the flexible harness plate from being too wide and obstructing the explosion-proof valve. Simultaneously, after specifying the number of cells on the battery bar, the length of each flexible harness plate is also limited, thus avoiding poor signal accuracy due to excessively long flexible harness plates. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of the signal acquisition component in an embodiment of the present invention;

[0021] Figure 2 This is an exploded view of the signal acquisition component in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the flexible wire harness plate in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the battery pack and a single flexible wire harness plate in an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Battery pack; 2. Signal acquisition component; 21. Signal acquisition harness; 211. Flexible harness board; 212. Receiver;

[0026] 3. First collection section; 4. Bending section; 41. Transition section; 42. First bending section; 43. Second bending section; 5. Second collection section. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] Flexible wiring harness boards 211, such as FPCs, serve as the transmission carrier for cell signals. They transmit the cell's voltage and temperature signals to the battery management system (BMS) via low-voltage wiring harnesses. Therefore, flexible wiring harness boards 211 play a crucial role in battery packs. In the design, the pins of the cell and the FPC plug-in correspond one-to-one, and the cell also corresponds one-to-one with the BMS plug-in pins. This correspondence is used to transmit low-voltage signals to the BMS via the flexible wiring harness board 211. Currently, because the placement of the flexible wiring harness board 211 on the cell needs to avoid the explosion-proof valve on the cell, when the flexible wiring harness board 211 extends on the signal acquisition wiring harness 21 of the battery module, it can only acquire cell signals from one side of the battery module. With a large number of cells, the flexible wiring harness board 211 acquires more cell signals, resulting in a wider board that can easily obstruct the explosion-proof valve. Simultaneously, the relatively long length of the flexible wiring harness board 211 affects signal transmission, leading to poorer signal accuracy.

[0032] In view of this, the present invention provides a signal acquisition harness 21 and a battery pack for a battery assembly, in order to solve the problem that the flexible harness plate 211 blocks the explosion-proof valve and the signal accuracy is poor when there are many batteries.

[0033] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.

[0034] According to an embodiment of the present invention, in one aspect, a signal acquisition harness 21 for a battery assembly is provided, the signal acquisition harness 21 including a receiver 212 and a flexible harness board 211.

[0035] In this embodiment, the receiver 212 is used to output signals from the flexible wire harness board, typically transmitting the voltage signal collected by the flexible wire harness board 211 to the battery management system. The battery management system can determine the actual working state of each cell based on the voltage signal.

[0036] Furthermore, in this embodiment, the signal side of the flexible wire harness board 211 is used to output the acquired battery voltage signal, and the acquisition side of the flexible wire harness board 211 is used to acquire the battery voltage signal. The signal side of the flexible wire harness board 211 is connected to the receiver 212, and the acquisition side of the flexible wire harness board 211 is adapted to be connected to the battery pack 1. The flexible wire harness board 211 is generally an integral long rectangular structure. In the extending direction of the flexible wire harness board 211, the acquisition side of the flexible wire harness board 211 includes a first acquisition part 3, a bending part 4, and a second acquisition part 5.

[0037] Specifically, the first collecting part 3 extends along the arrangement direction of the cells on the battery pack 1 and is connected to the first electrode of each cell on the battery pack 1. A bending part 4 is located at the end of the battery pack 1 along the arrangement direction of the cells, and one end of the bending part 4 is connected to the first collecting part 3. The second collecting part 5 is connected to the other end of the bending part 4, extends along the arrangement direction of the cells on the battery pack 1, and is connected to the second electrode of each cell on the battery pack 1; the first electrode and the second electrode have opposite polarities. The first electrode is one of the positive and negative electrodes on the cell, and the second electrode is the other of the positive and negative electrodes on the cell.

[0038] In other words, when installing the flexible wire harness board 211, the first acquisition part 3 is laid on the first electrode of the battery pack 1, and the first acquisition part 3 is connected from the first electrode of the first cell of the battery pack 1 to the first electrode of the last cell. Then, it is bent at the last cell to form a bend 4, and then the second acquisition part 5 is laid on the second electrode of the battery pack 1, and the second acquisition part 5 is connected from the second electrode of the last cell of the battery pack 1 to the second electrode of the first cell.

[0039] Of course, either the first acquisition unit 3 or the second acquisition unit 5 can be connected to the signal side of the flexible wire harness board 211. This embodiment does not limit this, and those skilled in the art can make changes according to actual conditions, as long as the same technical effect is achieved.

[0040] In this configuration, the flexible wire harness board 211 is directly bent, allowing it to acquire signals from the cells on battery pack 1. Since the actual width of the flexible wire harness board 211 is related to the number of cells on battery pack 1, its width can be directly limited within a certain range. That is, the flexible wire harness board 211 can only acquire a specified number of cells from one battery pack 1. Therefore, it prevents the flexible wire harness board 211 from being too wide and obstructing the explosion-proof valve. Simultaneously, the length of each flexible wire harness board 211 is also limited after the number of cells on battery pack 1 is specified. When there are many battery packs 1, multiple signal acquisition wire harnesses 21 can be used to acquire signals from different battery packs 1, thus avoiding poor signal accuracy due to the long length of the flexible wire harness board 211.

[0041] In this embodiment, the flexible wiring harness board 211 adopts a design with two bending folds, and the specifications of the flexible wiring harness board 211 are standardized, reducing product development time and costs, while also accommodating different numbers of battery cells. Compared to the current design of directly cutting the flexible wiring harness board 211, the flexible wiring harness board 211 in this technical solution does not require cutting, resulting in strong random variability, high versatility, and flexible adjustability. Furthermore, the flexible wiring harness board 211 directly interlocks with the battery management system after two bending folds, eliminating the need for the low-voltage wiring harness's cell signal acquisition section, saving considerable space. This is particularly useful when the electrical compartment space is already compact, and also contributes to weight reduction.

[0042] Furthermore, in an optional embodiment, the bending portion 4 includes a transition section 41, a first bending section 42, and a second bending section 43.

[0043] Specifically, in this embodiment, the transition section 41 is located at the tail of the battery pack 1 and extends from the first electrode of the battery pack 1 to the second electrode of the battery pack 1 to achieve signal continuity. One end of the first bent section 42 is connected to the first acquisition unit 3, and the other end of the first bent section 42 is bent upwards / downwards and then connected to the transition section 41. One end of the second bent section 43 is connected to the second acquisition unit 5, and the other end of the second bent section 43 is bent upwards / downwards and then connected to the transition section 41.

[0044] Of course, the first bending segment 42 can also be bent downwards, and the second bending segment 43 can also be bent upwards. This embodiment is merely an example of the bending methods of the first bending segment 42 and the second bending segment 43, but it does not limit the scope of the invention. Those skilled in the art can make changes according to the actual situation, as long as the same technical effect is achieved.

[0045] Furthermore, in an optional embodiment, the bending angle A of the first bending segment 42 is 45 degrees, and the bending angle B of the second bending segment 43 is 45 degrees.

[0046] Furthermore, in an optional embodiment, the width C of the flexible wire harness plate 211 is between 20 mm and 60 mm, and the width direction of the flexible wire harness plate 211 is perpendicular to the extension direction of the flexible wire harness plate 211.

[0047] Furthermore, in an optional embodiment, an explosion-proof zone is provided between the first acquisition unit 3 and the second acquisition unit 5. The explosion-proof zone is the area formed by all the explosion-proof valves on the battery pack 1. The width D of the explosion-proof zone is between 20mm and 50mm, and the width direction of the explosion-proof zone is perpendicular to the extension direction of the flexible wire harness plate 211.

[0048] Secondly, this utility model also provides a battery pack, which includes a battery assembly and multiple signal acquisition components 2.

[0049] Specifically, in this embodiment, the battery assembly contains multiple battery packs, and each battery pack contains multiple battery rows 1 arranged sequentially. Each battery row 1 consists of multiple battery cells arranged in the same direction. The area formed by the explosion-proof valves of all the battery cells on the battery row 1 is the explosion-proof zone.

[0050] Furthermore, in this embodiment, each group of signal acquisition devices 2 is connected to each battery pack, meaning that one group of signal acquisition devices 2 acquires the signal of one battery pack. Each group of signal acquisition devices 2 is provided with multiple signal acquisition harnesses 21, and each signal acquisition harness 21 is connected to each battery pack 1. In this way, the number of signal acquisition devices 2 corresponds one-to-one with the number of battery packs 1. The signal acquisition harness 21 includes a flexible harness board 211 as described in any of the above embodiments and a receiver 212.

[0051] Furthermore, in this embodiment, the battery management system is connected to the flexible wiring harness board 211 via the receiver 212.

[0052] With this configuration, in this embodiment, by setting up the signal acquisition component 2, when multiple battery packs 1 are set in each battery pack, multiple signal acquisition harnesses 21 can be directly used to acquire data from different battery packs 1. In this embodiment, since the actual width of the flexible harness plate 211 is related to the number of cells on the battery pack 1, the width of the flexible harness plate 211 can be directly limited within a certain range. That is to say, the flexible harness plate 211 can only acquire a specified number of cells on one battery pack 1. Therefore, it can prevent the flexible harness plate 211 from being too wide and obstructing the explosion-proof valve. At the same time, after the number of cells on the battery pack 1 is specified, the length of each flexible harness plate 211 is also limited, thereby avoiding poor signal accuracy due to the long length of the flexible harness plate 211.

[0053] Furthermore, in an optional embodiment, in each group of signal acquisition components 2, a portion of the flexible wire harness plate 211 extends from the first electrode of the battery pack 1, bends, and then extends towards the second electrode of the battery pack 1. Another portion of the flexible wire harness plate 211 extends from the second electrode of the battery pack 1, bends, and then extends towards the first electrode of the battery pack 1.

[0054] For example, this battery pack has six battery bars 1, and the signal acquisition unit 2 has six signal acquisition harnesses 21. In order to evenly distribute the signal acquisition harnesses 21, three signal acquisition harnesses 21 can be placed at the first electrode of the battery pack, and the other three acquisition harnesses can be placed at the second electrode of the battery pack.

[0055] Of course, this embodiment is merely an example of the distribution of the signal acquisition harness 21, but it does not limit the scope of the embodiment. Those skilled in the art can make changes according to the actual situation, as long as the same technical effect can be achieved.

[0056] Furthermore, in an alternative implementation, such as Figure 1 and Figure 2 As shown, each group of signal acquisition components 2 is equipped with four signal acquisition harnesses 21, corresponding to four battery packs 1. Two of the signal acquisition harnesses 21 have flexible harness plates 211 extending from the first electrode of the battery pack 1, then bending, and extending towards the second electrode of the battery pack 1. These two signal acquisition harnesses 21 can acquire signals from the first two battery packs 1. The other two flexible harness plates 211 extend from the second electrode of the battery pack 1, then bend, and extend towards the first electrode of the battery pack 1. These two signal acquisition harnesses 21 can acquire signals from the last two battery packs 1.

[0057] Furthermore, in an alternative embodiment, along the arrangement sequence of the battery packs 1, the next flexible harness plate 211 is located above the previous flexible harness plate 211. That is, the signal acquisition harness 21 of the first battery pack 1 is at the bottom, and then the signal acquisition harness 21 of the second battery pack 1 is placed on top of the signal acquisition harness of the first battery pack 1. And so on.

[0058] Furthermore, in an optional implementation, in each battery pack, the last cell sampled by the previous signal acquisition harness 21 and the first cell sampled by the next signal acquisition harness 21 are the same cell. Therefore, the acquisition point of the last cell is the common harness point of the two signal acquisition harnesses 21.

[0059] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A signal acquisition harness for a battery assembly, characterized in that, include: Receiver (212) is used to output signals from the flexible wire harness board; A flexible wire harness board (211) is provided, the signal side of which is connected to the receiver (212), and the acquisition side of which is adapted to be connected to the battery pack (1). The acquisition side of the flexible wire harness plate (211) includes: The first acquisition unit (3) extends along the arrangement direction of the cells on the battery pack (1) and is connected to the first electrode of each cell on the battery pack (1). The bending part (4) is located at the end of the battery pack (1) along the arrangement direction of the cells on the battery pack (1), and one end of the bending part (4) is connected to the first collection part (3). The second collection part (5) is connected to the other end of the bent part (4); the second collection part (5) extends along the arrangement direction of the cells on the battery pack (1) and is connected to the second electrode of each cell on the battery pack (1); the first electrode and the second electrode have opposite polarities.

2. The signal acquisition harness according to claim 1, characterized in that, The bent portion (4) includes: The transition section (41) extends from the first electrode of the battery pack (1) to the second electrode of the battery pack (1); The first bending section (42) has one end connected to the first acquisition unit (3), and the other end of the first bending section (42) is bent upward / downward and connected to the transition section (41). The second bending section (43) has one end connected to the second acquisition unit (5), and the other end of the second bending section (43) bends upward / downward and connects to the transition section (41).

3. The signal acquisition harness according to claim 2, characterized in that, The bending angle A of the first bending segment (42) is 45 degrees, and the bending angle B of the second bending segment (43) is 45 degrees.

4. The signal acquisition harness according to any one of claims 1 to 3, characterized in that, The width C of the flexible wire harness plate (211) is 20mm to 60mm, and the width direction of the flexible wire harness plate (211) is perpendicular to the extension direction of the flexible wire harness plate (211).

5. The signal acquisition harness according to any one of claims 1 to 3, characterized in that, An explosion-proof zone is provided between the first acquisition unit (3) and the second acquisition unit (5). The width D of the explosion-proof zone is about 20mm to 50mm. The width direction of the explosion-proof zone is perpendicular to the extension direction of the flexible wire harness plate (211).

6. A battery pack, characterized in that, include: The battery assembly contains multiple battery packs, each of which contains multiple battery bars (1) arranged in sequence. Each battery bar (1) is composed of multiple cells arranged in the same direction. Multiple signal acquisition units (2) are provided, and each signal acquisition unit (2) is connected to each battery pack. Each signal acquisition unit (2) is provided with multiple signal acquisition harnesses (21), and each signal acquisition harness (21) is connected to each battery pack (1). The signal acquisition harness (21) includes a flexible harness board (211) as described in any one of claims 1 to 5 and a receiver (212); The battery management system is connected to the flexible wire harness board (211) via a receiver (212).

7. The battery pack according to claim 6, characterized in that, In each signal acquisition unit (2), a portion of the flexible wire harness plate (211) extends from the first electrode of the battery pack (1) and then bends, and then extends to the second electrode of the battery pack (1); another portion of the flexible wire harness plate (211) extends from the second electrode of the battery pack (1) and then bends, and then extends to the first electrode of the battery pack (1).

8. The battery pack according to claim 7, characterized in that, Each signal acquisition unit (2) is provided with four signal acquisition harnesses (21). Two of the signal acquisition harnesses (21) have flexible harness plates (211) that extend from the first electrode of the battery pack (1) and then bend, and then extend to the second electrode of the battery pack (1). The other two flexible harness plates (211) extend from the second electrode of the battery pack (1) and then bend, and then extend to the first electrode of the battery pack (1).

9. The battery pack according to claim 8, characterized in that, Following the arrangement of the battery pack (1), the next flexible wire harness plate (211) is located above the previous flexible wire harness plate (211).

10. The battery pack according to claim 8, characterized in that, In each battery pack, the last cell acquired by the previous signal acquisition harness (21) is the same cell as the first cell acquired by the next signal acquisition harness (21).

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