Soft package battery pack connecting structure

Abstract

The utility model relates to the technical field of battery packs, and discloses a soft-package battery pack connecting structure which comprises a battery core assembly, the battery cell adapter plate is fixed on one side of an electrode of the battery cell assembly and is electrically connected with the battery cell assembly; a cell function board; the first bracket is arranged between the battery cell adapter plate and the battery cell function plate and is used for separating the battery cell function plate from the battery cell adapter plate; wherein the first support is provided with a plurality of wire conduits, one ends of the wire conduits abut against the battery cell adapter plate, the other ends of the wire conduits abut against the battery cell functional plate, and the battery cell adapter plate is electrically connected with the battery cell adapter plate by enabling wires to penetrate through the wire conduits. According to the utility model, by utilizing the separation design of the first bracket, the function of safety protection between the function board and the adapter board can be realized.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack technology, specifically relating to a soft-pack battery pack connection structure. Background Technology

[0002] Common consumer-grade pouch battery packs consist of a functional board and a cell adapter board. These two boards are typically connected by silicone flexible wires or metal plates. For high-current applications, custom-made metal terminals and locking fasteners are usually required to connect the functional board and the cell adapter board. However, in situations with limited internal space within the battery pack, silicone wire connections can lead to difficulties in cable management, and excessively long metal plates or terminals can compromise production quality and hinder mass production.

[0003] Currently, the production of soft-pack battery packs involves a large number of molds for metal sheets or terminals, resulting in low production efficiency and difficulty in meeting the large market demand. Furthermore, the safety protection between the functional boards and adapter boards inside the soft-pack battery pack is lacking, posing a safety hazard. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a soft-pack battery pack connection structure that reduces the number of molds by using wires instead of wires, and improves the safety between the cell function board and the cell adapter board through the design of the first bracket.

[0005] The technical effects to be achieved by this utility model are realized through the following aspects:

[0006] This utility model provides a soft-pack battery pack connection structure, including:

[0007] Battery cell assembly;

[0008] A cell adapter plate is fixed to one side of the electrode of the cell assembly and is electrically connected to the cell assembly.

[0009] Battery cell functional board; and

[0010] A first bracket is disposed between the cell adapter board and the cell function board to separate the cell function board and the cell adapter board;

[0011] The first bracket is provided with several wire tubes, one end of which is close to the cell adapter plate and the other end is close to the cell function board. The cell adapter plate is electrically connected to the cell adapter plate by passing the wires through the wire tubes.

[0012] In some implementations, the first support includes a base plate and side plates disposed along the circumference of the base plate;

[0013] The conduit is disposed on the base plate and extends toward the side close to the cell functional board, which is disposed on the conduit.

[0014] In some implementations, the base plate is provided with a plurality of support and fixing columns arranged parallel to the conduit, and the cell functional board is fixed to the support and fixing columns by fasteners.

[0015] In some implementations, the soft-pack battery pack connection structure further includes a second bracket for supporting the battery cell assembly, and the second bracket is detachably connected to the first bracket.

[0016] In some implementations, the detachable connection between the first bracket and the second bracket is a snap-fit ​​connection.

[0017] In some implementations, the base plate is provided with multiple supporting and fixing columns, the second bracket has an opening facing the first bracket, and the second bracket and the first bracket cooperate to form a cavity for accommodating the battery cell assembly.

[0018] In some implementations, the side plate of the second bracket is provided with multiple ventilation holes.

[0019] In some implementations, a pluggable signal connector is provided between the cell adapter board and the cell function board.

[0020] In some implementations, the cell assembly is equipped with a temperature sensor, which is electrically connected to the cell adapter board.

[0021] In some implementations, the temperature sensor is a leaded NTC.

[0022] In summary, this utility model has at least the following advantages:

[0023] This utility model provides a connection structure for a soft-pack battery pack. The cell function board is connected to the cell adapter board via wires, replacing metal sheets or metal terminal molds to achieve current transmission on the cell adapter board. This design is suitable for battery pack structures with limited internal space. The design of using a first bracket to separate the cell adapter board and the cell function board avoids the risk of foreign objects contacting the cell adapter board and causing short circuits. The wire conduit on the first bracket allows the wires to pass through, protecting them and making the wire connection more stable and reliable, while also facilitating wire management during production. Attached Figure Description

[0024] Figure 1 This is an exploded structural diagram of the soft-pack battery pack connection structure of Embodiment 1 of this utility model.

[0025] Figure 2 This is a schematic diagram of the structure of the first support in Embodiment 1 of this utility model.

[0026] Figure 3 This is a partially enlarged structural diagram of the first support in Embodiment 1 of this utility model.

[0027] Figure 4 This is an exploded view of the soft-pack battery pack connection structure of Embodiment 2 of this utility model.

[0028] Figure 5 This is an exploded structural diagram of the battery cell functional board, the first bracket, and the battery cell adapter board in Embodiment 3 of this utility model.

[0029] Marked in the image:

[0030] 1. Battery cell assembly; 2. Battery cell adapter board; 21. Wire; 22. Temperature sensor; 23. Signal connector; 3. First bracket; 31. Base plate; 311. Wire conduit; 312. Supporting fixing column; 313. Window; 32. Side plate; 321. Hook; 322. Reinforcing rib; 4. Battery cell functional board; 5. Second bracket; 51. Slot. Detailed Implementation

[0031] 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. The described embodiments are some, but not all, of the embodiments of this utility model.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] Example 1:

[0034] Please see Figures 1 to 3 The soft-pack battery pack connection structure of this utility model includes a cell assembly 1; a cell adapter plate 2, fixed on one side of the electrode of the cell assembly 1 and electrically connected to the cell assembly 1; a cell function board 4; and a first bracket 3, disposed between the cell adapter plate 2 and the cell function board 4, for separating the cell function board 4 and the cell adapter plate 2; wherein, the first bracket 3 is provided with a plurality of wire tubes 311, one end of the wire tubes 311 abutting the cell adapter plate 2 and the other end abutting the cell function board 4, and the cell adapter plate 2 is electrically connected to the cell adapter plate 2 by passing the wires 21 through the wire tubes 311.

[0035] Specifically, the cell assembly 1 within the soft-pack battery pack connection structure consists of multiple cells. The plane of the cell adapter plate 2 is parallel to the direction of cell stacking. The cell adapter plate 2 is fixed to the electrode side near the cell assembly 1, and multiple cells are connected in series by the cell adapter plate 2. The cell adapter plate 2 is provided with wires 21 for power transmission. Two wires 21 are led out from the cell adapter plate 2 to act on the positive and negative terminals of the cell assembly 1. These wires 21 are preferably made of rigid wires, such as BV wires, as long as they can achieve high current transmission. The other end of the wires 21 is connected to the cell functional board 4. The cell adapter plate 2 and the cell functional board 4 are electrically connected through the wires 21, which makes the wiring inside the battery pack occupy less space. The cell adapter plate 2 and the cell functional board 4 are separated vertically by a first bracket 3, which can effectively prevent solder balls from the cell functional board 4 from falling onto the cell adapter plate 2, avoiding the risk of short circuit. The first support 3 is provided with a plurality of wire tubes 311, which pass through the upper and lower sides of the first support 3. The openings at both ends are close to the cell function board 4 and the cell adapter board 2, respectively. In this embodiment, there are two wire tubes 311, which correspond to the two wires 21 led out from the cell adapter board 2. The wires 21 pass through the wire tubes 311. The wire tubes 311 play a role in protecting the wires 21 and binding the wires 21, making the wires 21 less susceptible to interference and the connection more stable and reliable. At the same time, it avoids the wires 21 from being violently shaken during transportation, which would affect the stability of the connection, and also facilitates the connection and management of wires during production.

[0036] Furthermore, in some embodiments, the first support 3 includes a base plate 31 and a side plate 32 disposed along the circumference of the base plate 31; the wire conduit 311 is disposed on the base plate 31 and extends toward the side close to the cell function board 4, and the cell function board 4 is disposed on the wire conduit 311.

[0037] Understandably, the structure of the first bracket 3 is divided into two parts: a side plate 32 and a base plate 31. The two can be integrally formed or assembled separately. The side plate 32 is vertically set at the perimeter of the base plate 31. The wire conduit 311 is vertically set on the base plate 31 and located inside the side plate 32. The cell function board 4 is set on the wire conduit 311. The wire conduit 311 is used to support the cell function board 4. The height of the combination of the wire conduit 311 and the cell adapter plate 2 is lower than the height of the side plate 32, so that the side plate 32 can play a protective role.

[0038] In addition, the placement of the conductor tube 311 can be designed to fit snugly against the inner wall of the side plate 32. The two are connected and fixed by setting a reinforcing rib 322. The two are integrally injection molded, which strengthens the strength of the guide tube. The cell function board 4 can abut against the conductor tube 311 along the inner wall of the side plate 32. The side plate 32 plays a guiding role, which facilitates the positioning of the cell adapter board 2 during installation.

[0039] To facilitate the fixing of the cell adapter board 2, in some embodiments, the base plate 31 is provided with a plurality of support and fixing columns 312 arranged parallel to the conductor tube 311, and the cell function board 4 is fixed on the support and fixing columns 312 by fasteners.

[0040] Specifically, the base plate 31 is provided with multiple support and fixing posts 312 parallel to the conduit 311. The support and fixing posts 312 are spaced apart near the edge of the base plate 31. The cell function board 4 is provided with mounting holes corresponding to the support and fixing posts 312. The cell function board 4 is fixed to the support and fixing posts 312 by fasteners, so that the force on the cell function board 4 is more even. The fasteners are preferably screws, but other conventional connection structures can also be used, which will not be described in detail here.

[0041] The heights of the conduit 311 and the support column 312 can be set according to actual needs. When the first bracket 3 adopts a design where the height of the conduit 311 is lower than the height of the support column 312, the conduit 311 can be prevented from supporting the circuit.

[0042] In this embodiment, the soft-pack battery pack connection structure, through the design of the first bracket 3, separates the cell adapter plate 2 and the cell functional board 4, ensuring that they do not interfere with each other and providing protection, preventing foreign objects from falling onto the cell adapter plate 2 and causing safety risks. The cell adapter plate 2 and the cell functional board 4 are connected by a wire 21, which passes through the wire conduit 311 on the first bracket 3 to achieve electrical connection. The wire 21 is made of rigid wire, suitable for high current transmission. The wire 21 passing through the wire conduit 311 can bundle the wire 21, solving the problem of difficult wire management inside the battery pack, and also protecting the wire 21. Multiple support and fixing posts 312 parallel to the wire conduit 311 are set on the base plate 31 for fixing the cell functional board 4, distributing the fixing force on the cell functional board 4, and the detachable structure also facilitates disassembly and maintenance by technicians later.

[0043] Example 2:

[0044] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the connection structure of the soft-pack battery pack of this utility model. Please refer to [link / reference]. Figure 4 .

[0045] In some embodiments, the soft-pack battery pack connection structure further includes a second bracket 5, which supports the cell assembly 1 and is detachably connected to the first bracket 3.

[0046] Specifically, the soft-pack battery pack connection structure also includes a second bracket 5 for supporting the cell assembly 1. The second bracket 5 is located on the side of the cell assembly 1 away from the first bracket 3. The first bracket 3 and the second bracket 5 are provided with a mutually cooperating connection structure to realize the detachable connection between the two, which facilitates the limiting and fixing of the internal structure of the soft-pack battery pack. The detachable connection method also facilitates the replacement of subsequent parts.

[0047] Furthermore, the detachable connection between the first bracket 3 and the second bracket 5 is a snap-fit ​​connection. A hook 321 is provided on the outer wall of the first bracket 3, and a slot 51 is provided on the outer wall of the second bracket 5. The hook 321 and the slot 51 cooperate to connect and fix the first bracket 3 and the second bracket 5. In another embodiment, some hooks 321 also include an elastic body. The hook 321 is fixed to the first bracket 3 by the elastic body. When the elastic body is pressed, the elastic body deforms under force, driving the hook 321 to move away from the second bracket 5, so that the hook 321 disengages from the slot 51 on the second bracket 5. When the elastic body is released, the elastic body, under the action of restoring force, drives the hook 321 to move closer to the second bracket 5, so that the hook 321 engages with the slot 51 on the second bracket 5.

[0048] In addition, there are multiple buckle connections. In other embodiments, the hook 321 can be set on the second bracket 5 and the slot 51 can be set on the first bracket 3. No specific limitation is made here, and it depends on the actual situation.

[0049] In some embodiments, the second bracket 5 has an opening facing the first bracket 3, and the second bracket 5 and the first bracket 3 cooperate to form a cavity for accommodating the battery cell assembly 1.

[0050] Specifically, the second bracket 5 is a cuboid cavity with one open side and five closed sides. The second bracket 5 has an opening for installing the battery cell assembly 1 in the direction of the first bracket 3. The first bracket 3 and the second bracket 5 are connected to form a cavity. The battery cell assembly 1 and the battery cell adapter plate 2 are both located in the cavity. The second bracket 5 plays a protective role. Foam is placed between the side of the battery cell assembly 1 and the second bracket 5 to prevent the battery cell assembly 1 from directly contacting the second bracket 5 and reduce the impact or bumps during transportation.

[0051] To improve heat dissipation of the wire assembly 1, in some embodiments, the side plate 32 of the second bracket 5 is provided with multiple ventilation holes. The second bracket 5 has multiple ventilation holes on both opposite sides, and the multiple ventilation holes are arranged in a mesh pattern to form convection heat dissipation on both sides.

[0052] In this embodiment, the soft-pack battery pack connection structure also includes a second bracket 5. The battery cell assembly 1 is installed inside the second bracket 5. The second bracket 5 serves to support and protect the battery cell assembly 1, effectively reducing the impact or collision damage to the battery cell assembly 1. The second bracket 5 is connected to the first bracket 3 by a snap-fit ​​connection. This connection method facilitates production assembly and prevents the connection from falling off during transportation. The design of the ventilation holes reduces heat accumulation in the battery cell assembly 1 during charging and discharging, facilitating heat exchange between the battery cell assembly 1 and the external environment.

[0053] Example 3:

[0054] In some embodiments, see Figure 5 A pluggable signal connector 23 is provided between the cell adapter board 2 and the cell function board 4.

[0055] Specifically, the cell adapter board 2 and the cell function board 4 are electrically connected through the signal connector 23. The first bracket 3 is provided with a window 313 to facilitate the connection of the signal connector 23. The setting of the signal connector 23 makes the transmission between the cell adapter board 2 and the cell function board 4 more stable.

[0056] In order to protect the battery cell assembly 1, in some embodiments, the battery cell assembly 1 is provided with a temperature sensor 22, which is electrically connected to the battery cell adapter board 2.

[0057] Specifically, a temperature sensor 22 for detecting the temperature of the battery cells is led out from the cell adapter board 2 and positioned in the middle of the cell assembly 1. A partition plate is placed between adjacent cells to prevent interference and facilitate temperature acquisition of individual cells. The temperature sensor 22 can be accommodated in the gap between adjacent cells, preventing it from being squeezed by the cells. The temperature sensor 22 collects the temperature of the highest-temperature-sensitive cell and transmits the collected temperature signal to the cell adapter board 2, which then transmits it to the cell function board 4 via the signal connector 23. The cell function board 4 determines the transmitted temperature signal based on a set temperature threshold, thereby controlling the power or connection of the cell assembly 1.

[0058] Furthermore, the temperature sensor 22 is a leaded NTC. This type of temperature sensor 22 has high sensitivity, can provide more accurate temperature values, and is not easily affected by external interference or noise. During long-term use, the electrical performance of the leaded NTC is relatively stable.

[0059] In this embodiment, a lead-type NTC is led out from the cell adapter board 2 and placed inside the cell assembly 1 to collect the temperature signal of the cell with the highest temperature. The cell function board 4 controls the power of the cell assembly 1 based on the signal obtained from the temperature sensor 22, so as to avoid irreversible damage to the cell caused by excessive internal temperature of the cell assembly 1. The setting of the temperature sensor 22 makes the use of the soft pack battery pack safer.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] 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., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0062] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0063] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0064] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A soft-pack battery pack connection structure, characterized in that, include: Battery cell assembly; A cell adapter plate is fixed to one side of the electrode of the cell assembly and is electrically connected to the cell assembly. Cell functional board; as well as A first bracket is disposed between the cell adapter board and the cell function board to separate the cell function board and the cell adapter board; The first bracket is provided with a plurality of wire tubes, one end of which is close to the cell adapter plate and the other end is close to the cell function board. The cell adapter plate is electrically connected to the cell adapter plate by passing the wires through the wire tubes.

2. The soft-pack battery pack connection structure according to claim 1, characterized in that, The first support includes a base plate and side plates arranged along the circumference of the base plate; The conduit is disposed on the base plate and extends toward the side close to the cell functional board, which is disposed on the conduit.

3. The soft-pack battery pack connection structure according to claim 2, characterized in that, The base plate is provided with a plurality of support and fixing columns arranged parallel to the conduit, and the cell functional board is fixed on the support and fixing columns by fasteners.

4. The soft-pack battery pack connection structure according to claim 1, characterized in that, The soft-pack battery pack connection structure also includes a second bracket, which is used to support the battery cell assembly, and the second bracket is detachably connected to the first bracket.

5. The soft-pack battery pack connection structure according to claim 4, characterized in that, The detachable connection between the first bracket and the second bracket is a snap-fit ​​connection.

6. The soft-pack battery pack connection structure according to claim 4, characterized in that, The second bracket has an opening facing the first bracket, and the second bracket cooperates with the first bracket to form a cavity for accommodating the battery cell assembly.

7. The soft-pack battery pack connection structure according to claim 6, characterized in that, The side plate of the second bracket has multiple ventilation holes.

8. The soft-pack battery pack connection structure according to claim 1, characterized in that, A pluggable signal connector is provided between the cell adapter board and the cell function board.

9. The soft-pack battery pack connection structure according to claim 8, characterized in that, The battery cell assembly is equipped with a temperature sensor, which is electrically connected to the battery cell adapter board.

10. The soft-pack battery pack connection structure according to claim 9, characterized in that, The temperature sensor is a leaded NTC.

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