Battery device and battery pack

Abstract

The utility model relates to the technical field of new energy batteries, and discloses a battery device and a battery pack, an FPC (Flexible Printed Circuit) main body circuit is provided with a folding section, so that the structural strength of an FPC at the position of a spacing area between battery packs can be enhanced, and the FPC is not easy to damage or deform due to lack of a supporting structure at the bottom when crossing the spacing area. The battery device comprises at least two battery packs and an FPC (flexible printed circuit), an interval area is arranged between every two adjacent battery packs, the FPC is arranged above the battery packs and used for collecting information of the battery packs, the FPC comprises a main circuit, the main circuit comprises a main circuit body and a folding section, and at least part of orthographic projection of the folding section towards the direction of the battery packs is located in the interval area. And the ratio of the distance b between the adjacent battery packs to the width a of the folding section ranges from 1 to 3.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, and particularly relates to a battery device and a battery pack. Background Art

[0002] With the continuous development of new energy technologies, as an environmentally friendly energy storage and release device, new energy batteries have been widely used in energy storage power systems such as hydraulic, thermal, wind, and solar power stations, as well as in many technical fields such as power tools, electric bicycles, electric motorcycles, electric vehicles, military equipment, and aerospace.

[0003] In the existing battery device, multiple battery groups are provided, and there is an interval area between adjacent battery groups. An FPC (Flexible Printed Circuit, hereinafter referred to as FPC for short) is also provided in the battery device. The FPC needs to be spanned over the interval area between adjacent battery groups. The bottom of this part of the FPC is suspended because of the lack of a support structure, which will affect the overall strength of the FPC, making the main body circuit of the FPC prone to tearing or deformation, and affecting the performance and normal use of the battery device. Summary of the Utility Model

[0004] In view of this, the utility model provides a battery device to solve the problem that when the FPC in the existing battery device spans the interval area between adjacent battery groups, the structural strength of the FPC is affected, making the main body circuit of the FPC easily damaged and affecting the performance and normal use of the battery device.

[0005] In a first aspect, the utility model provides a battery device, comprising:

[0006] At least two battery groups, with an interval area between adjacent battery groups;

[0007] An FPC, arranged above the battery groups and used for collecting information of the battery groups. The FPC includes a main body circuit, and the main body circuit includes a main body circuit body and a folding section. The orthographic projection of the folding section in the direction towards the battery groups is at least partially located in the interval area. The ratio range of the distance b between adjacent battery groups to the width a of the folding section is 1 - 3.

[0008] Beneficial effects: The battery device of the present utility model includes at least two groups of battery packs and an FPC. There is a spacing area between adjacent battery packs. The main circuit of the FPC is provided with a folding section, and at least part of the orthographic projection of the folding section towards the direction where the battery pack is located is located in the spacing area, that is, at least part of the folding section is placed above the spacing area. Compared with the main body circuit itself, the folding section has higher structural strength. The FPC crosses the spacing area through the folding section, which can enhance the structural strength of the FPC at the position of the spacing area, making it not easy to be damaged or deformed due to the lack of a support structure at the bottom when the FPC crosses the spacing area, ensuring the performance and normal use of the battery device.

[0009] Moreover, the ratio range of the distance b between adjacent battery packs to the width a of the folding section is 1 - 3. The width a of the folding section can be adjusted according to the distance b between adjacent battery packs and based on the above ratio range. For example, when the distance b between adjacent battery packs is large, the width a of the folding section needs to be increased accordingly according to the above ratio range to ensure that the main circuit of the FPC has sufficient structural strength and is not easy to be damaged, guaranteeing the service life. When the distance b between adjacent battery packs is small, the width a of the folding section is reduced accordingly according to the above ratio range, saving manufacturing materials and reducing manufacturing costs on the premise of ensuring that the main circuit has sufficient structural strength.

[0010] In the second aspect, the present utility model further includes a battery pack, which includes the battery device as described above.

[0011] Since the battery pack of the present utility model includes the battery device of the present utility model and has the same beneficial effects as the battery device, it will not be elaborated here. Description of the Drawings

[0012] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is the front view of the battery device of the present utility model;

[0014] Figure 2 It is Figure 1 The enlarged schematic view of part A in

[0015] Figure 3 It is the three-dimensional schematic view of the battery device of the present utility model;

[0016] Figure 4 It is Figure 3 The enlarged schematic view of part B in

[0017] Figure 5 Schematic diagram of the FPC in the battery device of the present utility model;

[0018] Figure 6 Schematic diagram of the separator in the battery device of the present utility model.

[0019] Explanation of reference numerals:

[0020] 1. Battery pack; 101. Spacing area; 2. Main body line body; 3. First folding section; 4. Second folding section; 5. Separator; 6. Third folding section; 7. Fourth folding section; 8. Frame; 9. Middle suspension point. Specific embodiments

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] The following will describe Figures 1 to 6 embodiments of the battery device and battery pack of the present utility model in conjunction with

[0023] According to an embodiment of the present utility model, on the one hand, a battery device is provided, including: at least two groups of battery packs 1 and an FPC. There is a spacing area 101 between adjacent battery packs 1. The FPC is disposed above the battery packs 1 and is used to collect information of the battery packs 1. The FPC includes a main body line, and the main body line includes a main body line body 2 and a folding section. The orthographic projection of the folding section toward the direction where the battery packs 1 are located is at least partially located in the spacing area 101. The ratio range of the distance b between adjacent battery packs 1 to the width a of the folding section is 1 to 3.

[0024] In such a battery device, the main body line of the FPC is provided with a folding section. The orthographic projection of the folding section toward the direction where the battery packs 1 are located is at least partially located in the spacing area 101, that is, at least part of the folding section is placed above the spacing area 101. Compared with the main body line body 2, the folding section has higher structural strength. The FPC straddles the spacing area 101 through the folding section, which can enhance the structural strength of the FPC at the position of the spacing area 101, so that the FPC is not easily damaged or deformed due to the lack of a support structure at the bottom when straddling the spacing area 101, ensuring the performance and normal use of the battery device.

[0025] Moreover, the ratio range of the distance b between adjacent battery packs 1 to the width a of the folding section is 1 to 3. The width a of the folding section can be adjusted according to the distance b between adjacent battery packs 1 and based on the above ratio range. For example, when the distance b between adjacent battery packs 1 is relatively large, the width a of the folding section needs to be increased accordingly according to the above ratio range to ensure that the main circuit of the FPC has sufficient structural strength, making it not easily damaged and ensuring its service life. When the distance b between adjacent battery packs 1 is relatively small, the width a of the folding section is reduced accordingly according to the above ratio range, saving manufacturing materials and reducing manufacturing costs on the premise of ensuring that the main circuit has sufficient structural strength.

[0026] The battery device has a box body, which includes a bottom plate and a frame 8. The frame 8 is disposed around the edge of the bottom plate, and the frame 8 and the bottom plate enclose a setting space. Both the FPC and the battery pack 1 are disposed in this setting space. FPC refers to a flexible printed circuit board, Flexible Printed Circuit for short. Compared with traditional wire harnesses, FPC has obvious advantages in terms of safety, process flexibility, automated production, etc. The FPC includes a main circuit, and there are multiple wires inside the main circuit for transmitting electrical signals. Of course, the FPC also includes other structural components, such as output terminals, etc. The FPC can be electrically connected to a battery management component (such as a connector) through the output terminal to achieve the transmission of electrical signals.

[0027] At least two groups of battery packs 1 are provided, and the number of battery packs 1 is set according to the size of the setting space and the requirements of the battery device. For example, two groups, three groups, or five groups of battery packs 1 are set. There is an interval area 101 between adjacent battery packs 1, that is, adjacent battery packs 1 are not closely arranged but spaced apart. The interval space between adjacent battery packs 1 forms the interval area 101, and the interval area 101 has a certain width, which is the distance b between adjacent battery packs 1.

[0028] It should be noted that the "interval area" referred to in this embodiment means the interval space between adjacent battery packs. Each battery pack internally includes multiple batteries, and the gap between adjacent batteries within each battery pack is not the "interval area" referred to in this embodiment.

[0029] The FPC is disposed above the battery pack 1, and the FPC will be electrically connected to each battery pack 1 to collect information of the battery pack 1. The FPC includes a main circuit, and the main circuit includes a main circuit body 2 and a folding section. The main circuit body 2 and the folding section are connected. Among them, the main circuit body 2 refers to the part that is arranged along the original extension direction of the main circuit and does not pass through the interval area, such as Figure 2As shown, the original extension direction of the main circuit is from left to right. The main circuit on the left side of the interval area 1 is arranged along the original extension direction of the main circuit and does not pass through the interval area 101. This part of the main circuit is the main circuit body 2. The main circuit on the right side of the interval area 1 has passed through the interval area 1 and does not belong to the main circuit body 2 defined in this embodiment. The extension line of the extension direction of the main circuit body 2 will pass through the interval area.

[0030] The front projection of the folding section towards the direction where the battery pack 1 is located is at least partially located in the interval area 101, that is, at least part of the folding section is placed above the interval area 101, and at least part of the folding section straddles the interval area 101. The folding section is mainly used to enhance the structural strength of the FPC at the interval area 101 between adjacent battery packs 1.

[0031] As Figure 2 shown, the folding section has a certain width, which is a. Optionally, the width of the folding section is the same as the width of the main circuit body 2. The distance between adjacent battery packs 1 is b, that is, the width of the interval area 101 is b. The ratio range of the distance b between adjacent battery packs 1 to the width a of the folding section is 1 to 3. The width a of the folding section can be adjusted according to the distance b between adjacent battery packs and based on the above ratio range. For example, when the distance b between adjacent battery packs is relatively large, the width a of the folding section needs to be increased accordingly according to the above ratio range to ensure that the main circuit of the FPC has sufficient structural strength, making it not easily damaged and ensuring its service life. When the distance b between adjacent battery packs is relatively small, the width a of the folding section is reduced accordingly according to the above ratio range. On the premise of ensuring that the main circuit has sufficient structural strength, manufacturing materials are saved and the manufacturing cost is reduced. When the ratio of the distance b between adjacent battery packs 1 to the width a of the folding section is within the above ratio range, it can ensure that the width a of the folding section matches the distance b between adjacent battery packs 1, not only ensuring the structural strength of the FPC main circuit but also saving the manufacturing cost according to the situation.

[0032] For example, the ratio of the distance b between adjacent battery packs 1 to the width a of the folding section is 1.8, the distance b is 47 mm, and the width a is 26 mm; or the ratio of the distance b between adjacent battery packs 1 to the width a of the folding section is 1.2, the distance b is 50 mm, and the width a is 42 mm; or the ratio of the distance b between adjacent battery packs 1 to the width a of the folding section is 1.7, the distance b is 80 mm, and the width a is 47 mm.

[0033] In other embodiments, the ratio of the distance b between adjacent battery packs 1 to the width a of the folding section can also be 1, 2.5, 3, etc.

[0034] Further, the folding section includes a first folding section 3 and a second folding section 4. The main circuit body 2 is folded near the spacing area 101 to form the first folding section 3, and then the first folding section 3 is further folded to form the second folding section 4. The extending direction of the first folding section 3 forms an angle with the extending direction of the main circuit body 2, and at least a part of the second folding section 4 straddles the spacing area 101.

[0035] As Figure 1 and Figure 2 shown, the folding section includes a first folding section 3 and a second folding section 4, and the main circuit body 2, the first folding section 3 and the second folding section 4 are connected in sequence. The formation process of the first folding section 3 and the second folding section 4 is as follows: the main circuit body 2 extends along its extending direction, and the main circuit body 2 is folded near the spacing area 101 to form the first folding section 3, and then the first folding section 3 is further folded to form the second folding section 4. After the first folding section 3 and the second folding section 4 are formed, the extending direction of the first folding section 3 forms an angle with the extending direction of the main circuit body 2, and at least a part of the second folding section 4 straddles the spacing area 101 to enhance the structural strength of the FPC above the spacing area 101.

[0036] It should be noted that the range of the angle between the extending direction of the first folding section 3 and the extending direction of the main circuit body 2 is 0° to 180°.

[0037] Further, the ratio range of the distance b between adjacent battery packs 1 and the width a of the folding section is 1.5 to 2.

[0038] Due to the limited internal space of the battery device, preferably, the ratio range of the distance b between adjacent battery packs 1 and the width a of the folding section is 1.5 to 2. For example, the ratio of the distance b between adjacent battery packs 1 and the width a of the folding section is 1.5, 1.6, 1.7, 1.8, 1.9, 2, etc.

[0039] Further, the extending direction of the second folding section 4 is parallel to the extending direction of the main circuit body 2.

[0040] As Figure 2 shown in the perspective view, the extending direction of the main circuit body 2 is the left - right direction. In this embodiment, the extending direction of the second folding section 4 is also the left - right direction, so that the second folding section 4 can be arranged closer to the main circuit body 2, thereby making the structure of the FPC more compact and being beneficial to the structural layout.

[0041] Of course, since the main circuit body 2 is folded to form the first folding section 3, and the first folding section 3 is folded to form the second folding section 4, therefore, the extending direction of the second folding section 4 does not coincide with the extending direction of the main circuit body 2.

[0042] Further, the first folding section 3 is disposed below the main circuit body 2, and the second folding section 4 is disposed above the first folding section 3, or the first folding section 3 is disposed above the main circuit body 2, and the second folding section 4 is disposed below the first folding section 3.

[0043] As Figure 3 shown, in this embodiment, the upper side (upward) refers to the direction indicated by the arrow m, and the lower side (downward) refers to the direction indicated by the arrow n.

[0044] Specifically, the main circuit body 2 is folded downward near the spacer region 101 to form the first folding section 3. Therefore, the first folding section 3 is disposed below the main circuit body 2, and the first folding section 3 is folded upward to form the second folding section 4. Therefore, the second folding section 4 is disposed above the first folding section 3.

[0045] After the above folding process, the FPC main circuit forms a two-layer structure, that is, the first folding section 3 is located in the lower layer, and the second folding section 4 and the main circuit body 2 are at the same height and are both located in the upper layer. Therefore, the above folding method only has the thickness of two layers of FPC main circuits in the height direction, which can save height space.

[0046] In other embodiments, the first folding section 3 can also be disposed above the main circuit body 2, and the second folding section 4 can be disposed below the first folding section 3. Specifically, the main circuit body 2 is folded upward near the spacer region 101 to form the first folding section 3. Therefore, the first folding section 3 is disposed above the main circuit body 2, and the first folding section 3 is folded downward to form the second folding section 4. Therefore, the second folding section 4 is disposed below the first folding section 3. After the above folding process, the FPC main circuit can also form a two-layer structure, that is, the first folding section 3 is located in the upper layer, and the second folding section 4 and the main circuit body 2 are at the same height and are both located in the lower layer.

[0047] Further, the battery device further includes a separator 5, and the separator 5 is disposed in the overlapping region between the main circuit body 2 and the first folding section 3 and between the main circuit body 2 and the first folding section 3, and / or is disposed in the overlapping region between the first folding section 3 and the second folding section 4 and between the first folding section 3 and the second folding section 4.

[0048] Since there are multiple wires (collection wires) inside the main circuit body 2 of the FPC, after forming the folding section, at the connection (folding point) between the main circuit body 2 and the first folding section 3, and at the connection (folding point) between the first folding section 3 and the second folding section 4, the collection wires inside the main circuit body 2 are likely to break due to too small a bending angle. By providing a separator 5 and arranging the separator 5 in the overlapping area between the main circuit body 2 and the first folding section 3 and placing it between the main circuit body 2 and the first folding section 3, and / or arranging it in the overlapping area between the first folding section 3 and the second folding section 4 and placing it between the first folding section 3 and the second folding section 4, a certain arc transition section can be formed at the connection (folding point) between the main circuit body 2 and the first folding section 3 and at the connection (folding point) between the first folding section 3 and the second folding section 4, increasing the bending angle and making the collection wires inside the main circuit body 2 not easily break, thereby protecting the FPC and enabling it to be used normally.

[0049] In this embodiment, the separator 5 is arranged in the overlapping area between the main circuit body 2 and the first folding section 3 and placed between the main circuit body 2 and the first folding section 3, and the separator 5 is also arranged in the overlapping area between the first folding section 3 and the second folding section 4 and placed between the first folding section 3 and the second folding section 4.

[0050] As Figure 6 shown, the shape of the separator 5 matches the shape of the overlapping area between the main circuit body 2 and the first folding section 3 and the overlapping area between the first folding section 3 and the second folding section 4. In this embodiment, the overlapping area between the main circuit body 2 and the first folding section 3 is triangular, and the overlapping area between the first folding section 3 and the second folding section 4 is also triangular, so the shape of the separator 5 is triangular.

[0051] Of course, in other embodiments, in order to save manufacturing costs, the separator 5 can be arranged only in the overlapping area between the main circuit body 2 and the first folding section 3 and placed between the main circuit body 2 and the first folding section 3, or the separator 5 can be arranged only in the overlapping area between the first folding section 3 and the second folding section 4 and placed between the first folding section 3 and the second folding section 4.

[0052] Furthermore, the thickness range of the separator 5 is 0.5 mm to 1.0 mm.

[0053] At the connection (folding part) between the main circuit body 2 and the first folding section 3, and at the connection (folding part) between the first folding section 3 and the second folding section 4, a certain arc transition section is formed. In order to make the radian of the arc transition section suitable, the separator 5 has a certain thickness. If the thickness of the separator 5 is too small, the radian of the arc transition section is too small and the bending angle is too small, and the internal collecting wires of the main circuit body 2 are easily broken. If the thickness of the separator 5 is too large, the overall thickness of the folding section increases significantly, and it may even exceed the total thickness of the bus bar and the battery pole column, resulting in impossible assembly, and it will occupy too much installation space, causing waste of space and manufacturing costs.

[0054] The thickness range of the separator 5 is 0.5 mm to 1.0 mm. Within the above thickness range, an arc transition section with a suitable radian can be formed at the connection (folding part) between the main circuit body 2 and the first folding section 3, and at the connection (folding part) between the first folding section 3 and the second folding section 4, so that the bending angle of the folding section is appropriate, which can not only ensure that the internal collecting wires of the main circuit body 2 are not easily broken, but also will not occupy too much installation space. In this embodiment, the thickness of the separator 5 is 0.8 mm.

[0055] In other embodiments, the thickness of the separator 5 can also be 0.5 mm, 0.6 mm, 0.7 mm, 0.9 mm, 1.0 mm, etc.

[0056] Furthermore, the separator 5 is an elastic bonding member.

[0057] The separator 5 is made of an elastic material. The separator 5 is arranged between the main circuit body 2 and the first folding section 3, and between the first folding section 3 and the second folding section 4. The elastic separator 5 can provide a certain flexibility and elasticity, and can reduce the wear of the contact surface, protecting the FPC main circuit. In this embodiment, the separator 5 is a foam, and both sides of the foam can be connected to the FPC by bonding to enhance the reliability of the setting of the separator 5. For example, both sides of the foam have adhesive layers.

[0058] Moreover, in order to facilitate the setting of the separator 5, the separator 5 is a gasket structure, so that the separator 5 can be clamped between the main circuit body 2 and the first folding section 3, and between the first folding section 3 and the second folding section 4, and will not occupy too much installation space.

[0059] Furthermore, at least part of the folding section protrudes horizontally outward away from the main circuit body 2 to form a receiving space for receiving the position to be avoided.

[0060] In addition to enhancing the structural strength of the FPC above the interval region 101, the folding section is also used to avoid the position to be avoided, changing the extension direction of the main circuit of the FPC, so as to avoid position interference with the position to be avoided and facilitate the structural arrangement. Specifically, at least part of the folding section protrudes horizontally outward away from the main body of the main circuit 2 to form an accommodation space for accommodating the position to be avoided. Taking Figure 2 a perspective view as an example, the folding section protrudes downward and away from the main body of the main circuit 2 to form a concave accommodation space enclosed on three sides, and the position to be avoided is arranged in the accommodation space to achieve position avoidance.

[0061] Furthermore, the position to be avoided is the middle suspension point 9, and the battery device is installed on the electrical equipment through the middle suspension point 9.

[0062] A middle suspension point 9 is arranged in the battery device, and a bolt is arranged at the middle suspension point 9. The battery device can be installed on electrical equipment such as an automobile through the bolt at the middle suspension point 9.

[0063] As Figures 1 - 4 shown, the setting position of the middle suspension point 9 is at the interval region 101 between the two battery packs 1, and the setting position of the middle suspension point 9 is on the extension line of the extension direction of the FPC main circuit body 2. Through the folding section of the FPC main circuit, the middle suspension point 9 can be avoided, which does not affect the subsequent connection of the battery device to the electrical equipment through the middle suspension point 9, and can also ensure the normal arrangement and use of the FPC.

[0064] Furthermore, the folding section further includes a third folding section 6 and a fourth folding section 7. The second folding section 4 is folded to form the third folding section 6, and the third folding section 6 is further folded to form the fourth folding section 7. The extension direction of the third folding section 6 forms an angle with the extension direction of the main circuit body 2, and the extension direction of the fourth folding section 7 is parallel to the extension direction of the main circuit body 2. The first folding section 3, the second folding section 4, the third folding section 6 and the fourth folding section 7 form an accommodation space.

[0065] The folding section further includes a third folding section 6 and a fourth folding section 7. The main circuit body 2, the first folding section 3, the second folding section 4, the third folding section 6 and the fourth folding section 7 are connected in sequence. The formation process of the third folding section 6 and the fourth folding section 7 is as follows: when quickly moving away from the interval region 101, the second folding section 4 is folded to form the third folding section 6, and the third folding section 6 is further folded to form the fourth folding section 7. The extension direction of the formed third folding section 6 forms an angle with the extension direction of the main circuit body 2.

[0066] It should be noted that the angle range between the extension direction of the third folding section 6 and the extension direction of the main circuit body 2 is 0° to 180°.

[0067] Optionally, the extending direction of the fourth folding segment 7 is parallel to the extending direction of the main circuit body 2.

[0068] As Figure 2 shown in the perspective view, the extending direction of the main circuit body 2 is the left - right direction. In this embodiment, the extending direction of the fourth folding segment 7 is also the left - right direction, so as to make the structure more compact.

[0069] The first folding segment 3, the second folding segment 4, the third folding segment 6 and the fourth folding segment 7 form a receiving space. As Figures 1 - 4 shown, the receiving space is a concave space opening towards the middle suspension point 9, and the middle suspension point 9 is placed in the receiving space to achieve position avoidance.

[0070] Optionally, the extending direction of the fourth folding segment 7 coincides with the extending direction of the main circuit body 2.

[0071] Furthermore, the third folding segment 6 is placed below the second folding segment 4, and the fourth folding segment 7 is placed above the third folding segment 6, or the third folding segment 6 is placed above the second folding segment 4, and the fourth folding segment 7 is placed below the third folding segment 6.

[0072] In this embodiment, in order to enable the FPC main circuit to return to the original extending direction after passing through the interval area 101, the formation process of the folding segments is as follows:

[0073] The main circuit body 2 is folded downward near the interval area 101 to form the first folding segment 3. The first folding segment 3 is placed below the main circuit body 2. The first folding segment 3 is then folded upward to form the second folding segment 4. The second folding segment 4 is placed above the first folding segment 3. When approaching the far - away from the interval area 101, the second folding segment 4 is folded downward to form the third folding segment 6, and the third folding segment 6 is then folded upward to form the fourth folding segment 7.

[0074] After the above - mentioned folding process, the FPC main circuit forms a two - layer structure, that is, the first folding segment 3 and the third folding segment 6 are located in the lower layer, and the second folding segment 4, the fourth folding segment 7 and the main circuit body 2 are at the same height and are all located in the upper layer.

[0075] Of course, in other embodiments, the folding process can also be: the main circuit body 2 is folded upward near the interval area 101 to form the first folding segment 3. The first folding segment 3 is placed above the main circuit body 2. The first folding segment 3 is then folded downward to form the second folding segment 4. The second folding segment 4 is placed below the first folding segment 3. When approaching the far - away from the interval area 101, the second folding segment 4 is folded upward to form the third folding segment 6, and the third folding segment 6 is then folded downward to form the fourth folding segment 7.

[0076] After the above folding process, the main circuit of the FPC forms a two-layer structure, that is, the first folding section 3 and the third folding section 6 are located on the upper layer, and the second folding section 4, the fourth folding section 7 and the main circuit body 2 are at the same height and are all located on the lower layer.

[0077] Optionally, the second folding section 4 and the third folding section 6 can be symmetrically arranged with respect to the vertical bisector of the spacer region 101.

[0078] This embodiment also provides a battery pack, including the battery device as described above.

[0079] This battery pack has the battery device of this embodiment, and its FPC main circuit has folding sections. The orthographic projection of the folding sections in the direction of the battery pack 1 is at least partially located in the spacer region 101. The folding sections can enhance the structural strength of the FPC at the position of the spacer region 101, so that the FPC is not easily damaged or deformed due to the lack of a support structure at the bottom when straddling the spacer region 101. Moreover, the ratio range of the distance b between adjacent battery packs to the width a of the folding section is 1 to 3, which can not only ensure that the main circuit has sufficient structural strength, but also save manufacturing materials and reduce manufacturing costs.

[0080] Although the 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 battery device, characterized in that, Comprising: At least two groups of battery packs (1), with a spacing area (101) between adjacent battery packs (1); An FPC, disposed above the battery pack (1) for collecting information of the battery pack (1). The FPC includes a main circuit, and the main circuit includes a main circuit body (2) and a folding section. The positive projection of the folding section in the direction of the battery pack (1) is at least partially located in the spacing area (101). The ratio range of the distance b between adjacent battery packs (1) to the width a of the folding section is 1 to 3.

2. The battery device according to claim 1, characterized in that, The folding section includes a first folding section (3) and a second folding section (4). The main circuit body (2) is folded near the spacing area (101) to form the first folding section (3), and the first folding section (3) is further folded to form the second folding section (4). The extending direction of the first folding section (3) forms an angle with the extending direction of the main circuit body (2), and the second folding section (4) at least partially straddles the spacing area (101).

3. The battery device according to claim 2, characterized in that, The extending direction of the second folding section (4) is parallel to the extending direction of the main circuit body (2).

4. The battery device according to claim 2, wherein The first folding section (3) is disposed below the main circuit body (2), and the second folding section (4) is disposed above the first folding section (3), or the first folding section (3) is disposed above the main circuit body (2), and the second folding section (4) is disposed below the first folding section (3).

5. The battery device according to claim 2, characterized in that, The ratio range of the distance b between adjacent battery packs (1) to the width a of the folding section is 1.5 to 2.

6. The battery device according to any one of claims 2-5, characterized in that, Also included is a separator (5), which is disposed in the overlapping area between the main circuit body (2) and the first folding section (3) and between the main circuit body (2) and the first folding section (3), and / or is disposed in the overlapping area between the first folding section (3) and the second folding section (4) and between the first folding section (3) and the second folding section (4).

7. The battery device according to claim 6, characterized in that, The thickness range of the separator (5) is 0.5 mm to 1.0 mm.

8. The battery device according to claim 6, characterized in that, The separator (5) is an elastic bonding member.

9. The battery device according to claim 2, characterized in that, At least part of the folding section protrudes horizontally outward away from the main circuit body (2) to form a receiving space for receiving a position to be avoided.

10. The battery device according to claim 9, characterized in that, The folding section further includes a third folding section (6) and a fourth folding section (7). The second folding section (4) is folded to form the third folding section (6), and the third folding section (6) is further folded to form the fourth folding section (7). The extending direction of the third folding section (6) forms an angle with the extending direction of the main circuit body (2), and the extending direction of the fourth folding section (7) is parallel to the extending direction of the main circuit body (2). The first folding section (3), the second folding section (4), the third folding section (6) and the fourth folding section (7) form the receiving space.

11. The battery device according to claim 10, wherein, The third folding section (6) is placed below the second folding section (4), and the fourth folding section (7) is placed above the third folding section (6), or the third folding section (6) is placed above the second folding section (4), and the fourth folding section (7) is placed below the third folding section (6).

12. The battery device according to claim 9, wherein, The position to be avoided is the middle suspension point (9), and the battery device is installed on the electrical equipment through the middle suspension point (9).

13. A battery pack, characterized in that, It includes the battery device according to any one of claims 1-12.

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