Battery pack and battery pack

Abstract

The utility model discloses a battery pack and a battery pack. The battery pack comprises a plurality of single batteries, an insulating supporting piece and a flexible circuit board, the single battery comprises a shell, a cover plate and a battery cell, the battery cell is arranged in a closed space formed by the shell and the cover plate, and the cover plate comprises a body and a first insulating layer covering the surface of the side, away from the battery cell, of the body; a first opening is formed in the first insulating layer; and the insulating supporting piece is arranged between the cover plate of the single battery and the flexible circuit board, and is fixedly connected with the body through the first opening. Thus, through the arrangement of the insulating supporting piece, the body of each single battery cover plate can be fixedly connected with the insulating supporting piece, so that the connection rigidity of the battery pack is improved, and the safety and the stability of the battery pack are further improved; in addition, the insulating supporting piece is arranged between the cover plate and the flexible circuit board, so that the insulating supporting piece can support the flexible circuit board, the flexible circuit board can be arranged conveniently, and the reliability of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and a battery package. Background Art

[0002] In a battery pack, there is a battery group composed of multiple battery cells connected in series or in parallel. The battery group is placed in the box of the battery pack as a whole. When the battery pack is impacted by the outside world, the battery cells may move relative to each other, destroying the integrity of the battery pack, resulting in reduced safety and stability of the battery pack. Therefore, how to improve the connection strength between battery cells and thus improve the safety and stability of the battery pack has become a technical problem that needs to be solved urgently in this field. Utility Model Content

[0003] The embodiments of the utility model provide a battery pack and a battery package, which are used to improve the connection strength between battery cells, thereby improving the safety and stability of the battery pack.

[0004] In a first aspect, an embodiment of the utility model provides a battery pack, comprising: a plurality of single cells, an insulating support member and a flexible circuit board;

[0005] The single battery comprises: a shell, a cover plate and a battery cell, wherein the battery cell is arranged in a closed space formed by the shell and the cover plate, and the cover plate comprises: a body, and a first insulating layer covering a surface of the body on a side away from the battery cell; a first opening is arranged in the first insulating layer;

[0006] The insulating support member is disposed between the cover plate of the single cell and the flexible circuit board, and the insulating support member is fixedly connected to the body through the first opening.

[0007] In a second aspect, an embodiment of the utility model provides a battery pack, including: a battery pack as described in the first aspect above.

[0008] The beneficial effects of the utility model are as follows:

[0009] The utility model provides a battery pack and battery package, including: a plurality of single cells, an insulating support and a flexible circuit board; the single cell includes: a shell, a cover plate and a battery cell, the battery cell is arranged in a closed space formed by the shell and the cover plate, the cover plate includes: a body, and a first insulating layer covering the surface of the body on the side away from the battery cell; a first opening is arranged in the first insulating layer; the insulating support is arranged between the cover plate of the single cell and the flexible circuit board, and the insulating support is fixedly connected to the body through the first opening. In this way, by arranging the insulating support, the body of each single cell cover plate can be fixedly connected to the insulating support, thereby improving the connection rigidity of the battery pack, and further improving the safety and stability of the battery pack; in addition, the insulating support is arranged between the cover plate and the flexible circuit board, so that the insulating support can support the flexible circuit board, so as to facilitate the arrangement of the flexible circuit board and improve the reliability of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of a first single cell provided in an embodiment of the utility model;

[0011] Figure 2 A cross-sectional view of the first single cell provided in an embodiment of the utility model on the yz plane;

[0012] Figure 3 A top view of a first single cell provided in an embodiment of the utility model;

[0013] Figure 4 This is a schematic diagram of the structure of a second single cell provided in an embodiment of the utility model;

[0014] Figure 5 A cross-sectional view of the yz plane of the second single cell provided in the embodiment of the utility model;

[0015] Figure 6 A top view of a second single cell provided in an embodiment of the utility model;

[0016] Figure 7 It is a schematic diagram of the structure of a battery pack provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings to describe in detail the specific implementation of a battery pack and a battery pack provided by the embodiment of the utility model. It should be noted that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] The utility model embodiment provides a battery pack, such as Figures 1 to 3 As shown, Figure 2 for Figure 1 The battery pack is a cross-sectional view of the poles (including the positive pole 500 and the negative pole 600) along the plane shown in yz. Figure 3 for Figure 1 The top view of the cover plate 102 of the battery pack is shown, and in order to clearly show the first opening K1, Figure 3 The insulating support 200 and the flexible circuit board 300 are not shown in the figure, and the invention comprises: a plurality of single cells 100, an insulating support 200 and a flexible circuit board 300; the single cell 100 comprises: a shell 103, a cover plate 102 and a battery cell 101, the battery cell 101 is arranged in a closed space formed by the shell 103 and the cover plate 102, the cover plate 102 comprises: a body 1021, and a first insulating layer 1022 covering a surface of the body on a side away from the battery cell; a first opening K1 is provided in the first insulating layer 1022; the insulating support 200 is arranged between the cover plate 102 of the single cell 100 and the flexible circuit board 300, and the insulating support 200 is fixedly connected to the body 1021 through the first opening K1.

[0019] In this way, by providing an insulating support, the main body of each single battery cover plate can be fixedly connected to the insulating support, thereby improving the connection rigidity of the battery pack, and further improving the safety and stability of the battery pack; in addition, the insulating support is provided between the cover plate and the flexible circuit board, so that the insulating support can support the flexible circuit board, so as to facilitate the setting of the flexible circuit board and improve the reliability of the battery pack.

[0020] In addition, if Figure 2 As shown, the single cell 100 also includes an electrolyte ( Figure 2 (not shown in the figure), the battery cell 101 and the electrolyte are both arranged in the enclosed space formed by the cover plate 102 and the shell 103, and the battery cell 101 is immersed in the electrolyte. The side of the cover plate 102 facing away from the battery cell 101 is provided with a pole (including a positive pole 500 and a negative pole 600), and the pole lug E in the battery cell 101 is connected to the pole. The side of the cover plate 102 facing the enclosed space can be called the inner side, and the side opposite to the inner side can be called the outer side. Then the first insulating layer 1022 and the pole are both arranged on the outer side of the cover plate 102, that is, the surface of the cover plate 102 facing away from the battery cell 101 in the above content is the outer side of the cover plate 102.

[0021] It should be understood that the first insulating layer can be attached to the body or sprayed on the body. When the first insulating layer is attached to the body, if the insulating support is directly fixedly connected to the first insulating layer, the first insulating layer may fall off and cause the fixed connection to fail. Therefore, a first opening can be set in the first insulating layer so that the insulating support layer is fixedly connected to the body, thereby improving the reliability of the fixed connection. When the first insulating layer is sprayed on the body, a first opening is set in the first insulating layer so that the insulating support layer is fixedly connected to the body, thereby further improving the reliability of the fixed connection. The first opening in the first insulating layer can be set according to actual needs and is not limited here.

[0022] Alternatively, if Figure 2 As shown, the insulating support member 200 is bonded to the body 1021. Various forms of structural adhesive 400 can be used for bonding. In this way, the insulating support member 200 and the body 1021 are fixedly connected by bonding, the manufacturing method is simple, easy to operate, and the connection rigidity of the battery pack is strengthened in a simple manner, thereby improving the safety and stability of the battery pack.

[0023] Of course, in addition to the above-mentioned bonding method, the insulating support and the main body can also be fixedly connected by other methods known to technical personnel in the field, such as but not limited to bolt connection. The specific configuration can be made according to actual needs and is not limited here.

[0024] Optionally, the material used to make the insulating support member includes: a metal member or a thermosetting resin with a second insulating layer on the surface. Among them, the metal member includes but is not limited to: a steel plate sprayed with epoxy powder, an aluminum plate sprayed with unsaturated resin, etc., and the thermosetting resin includes but is not limited to: epoxy resin, polyester resin, vinyl ester, etc. In this way, when the insulating support member is made of metal, the battery pack has a higher connection stiffness. When the insulating support member is made of thermosetting resin, the thermosetting resin has a high elastic modulus and is not easy to deform. It can also effectively improve the connection stiffness of the battery pack, and the thermosetting resin itself is insulated. Therefore, the insulating support member does not need to be provided with an additional insulating layer, and the weight of the battery pack can be reduced and the cost can be reduced. In the specific implementation, the specific manufacturing material can be selected according to actual needs, which improves the flexibility of the setting of the insulating support member, thereby enabling the battery pack to be applied to more scenarios.

[0025] Alternatively, if Figure 2 As shown, the thickness d of the insulating support member 200 is not less than 1.2 mm and not more than 5 mm. The thickness of the insulating support member 200 is the thickness of the insulating support member 200 along the arrangement direction of the battery cell, the cover plate, and the insulating support member (i.e. Figure 2 The length of the direction shown by z in the figure.

[0026] In this way, it is possible to avoid setting the thickness of the insulating support member to be too small, resulting in a lower connection stiffness of the battery pack, and it is also possible to avoid setting the thickness of the insulating support member to be too large, resulting in a heavier weight of the battery pack. By setting the thickness of the insulating support member within an appropriate range, the connection stiffness and weight of the battery pack can be kept within an appropriate range, thereby improving the performance of the battery pack.

[0027] Alternatively, if Figure 1 As shown, the cover plate 102 is provided with a positive electrode column 500 and a negative electrode column 600; the insulating support member 200 is provided between the positive electrode column 500 and the negative electrode column 600. In this way, by providing the insulating support member 200 between the positive electrode column 500 and the negative electrode column 600, the volume of the insulating support member 200 can be reduced, thereby reducing the weight of the battery pack and optimizing the structure of the battery pack. In addition, by providing the insulating support member 200 between the positive electrode column 500 and the negative electrode column 600, it is also possible to avoid the insulating support member 200 interfering with the arrangement of the positive electrode column 500 and the negative electrode column 600, thereby optimizing the structural design of the battery pack.

[0028] Furthermore, if Figure 4 and Figure 5 As shown, Figure 5 for Figure 4 The cross-sectional view of the battery pack shown along the plane shown by yz, the battery pack also includes a plurality of busbars 700, the busbars 700 are located on the side of the cover plate 102 away from the battery cell 101; the busbars 700 and the orthographic projection of the insulating support member 200 on the top surface of the battery pack do not overlap. In this way, by setting the insulating support member 200 at a position where the busbar 700 is not set, the volume of the insulating support member 200 can be further reduced, thereby further reducing the weight of the battery pack and optimizing the structure of the battery pack. In addition, by setting the insulating support member 200 at a position where the busbar 700 is not set, it is also possible to avoid the insulating support member 200 interfering with the setting of the busbar 700, thereby optimizing the structural design of the battery pack.

[0029] In addition, if Figure 4 and Figure 5 As shown, the positive electrode column 500 and the negative electrode column 600 are used to lead out the positive electrode and the negative electrode of the battery cell 101 respectively. The arrangement of the positive electrode column 500 and the negative electrode column 600 can be as follows Figure 3As shown, "+" indicates the positive pole, and "-" indicates the negative pole. When a busbar 700 is provided, the busbar 700 can realize that the positive pole 500 of one of the two adjacent single cells 100 is electrically connected to the negative pole 600 of the other single cell 100, thereby realizing the series connection of each single cell 100. Of course, when it is necessary to realize the parallel connection of each single cell 100, the positive pole 500 of each single cell can be connected, and the negative pole of each single cell 600 can be connected. The busbar 700 is electrically connected to the flexible circuit board 300 through the connector L, and the connector L can be but is not limited to a nickel sheet. In this way, the current generated by the battery cell 101 is collected by the busbar 700 through the positive pole 500 and the negative pole 600 and output by the flexible circuit board 300, so as to facilitate the collection of the current and voltage of the battery pack.

[0030] In addition, when the busbar 700 is provided, the surface of the insulating support 200 away from the battery cell can be made flush or nearly flush with the surface of the busbar 700 away from the battery cell 101, so as to facilitate the electrical connection of the flexible circuit board 300 with the busbar 700 and optimize the structure of the battery pack.

[0031] Figures 1 to 6 In the description, a battery pack including 7 single cells is taken as an example. Of course, the number of single cells in a battery pack can also be 2, 3, 4, 5, 6, 8 or more, which is not limited here.

[0032] Alternatively, if Figures 4 to 6 As shown, Figure 6 for Figure 4 In the top view of the battery pack shown in the figure, an explosion-proof valve 800 is provided in the cover plate 102; the insulating support member 200 is provided with a second opening K2, and the second opening K2 is used to avoid the explosion-proof valve 800. The second opening K2 is used to avoid the explosion-proof valve 800, which can be understood as: when the explosion-proof valve 800 is exhausted, the exhausted gas can be smoothly discharged to the outside through the second opening K2.

[0033] In this way, by setting a second through hole in the insulating support, sufficient exhaust space can be provided in the event of thermal runaway of the battery pack, and the gas discharged from the explosion-proof valve can be smoothly discharged to the outside, thereby smoothly releasing the pressure caused by the gas generated inside the battery pack, thereby improving the safety of the battery pack.

[0034] Alternatively, if Figure 6As shown, a plurality of second openings K2 are provided, and each second opening K2 corresponds to an explosion-proof valve 800. In this way, the second openings K2 can be provided at the positions where they are provided as much as possible, and the body 1021 can be fixedly connected to the insulating support member 200 at the positions between the explosion-proof valves 800, thereby increasing the fixed connection positions of the insulating support member 200 and the body 1021, thereby improving the connection rigidity of the battery pack while ensuring the safety of the battery pack, and improving the safety and stability of the battery pack.

[0035] Optionally, there is one second opening, and the orthographic projection of the second opening on the surface of the cover plate surrounds all explosion-proof valves, that is, one second opening is used to avoid all explosion-proof valves, or, when there are multiple second openings, each second opening can correspond to multiple explosion-proof valves, such as but not limited to one second opening corresponding to two, three, four or more explosion-proof valves, and the specific number of second openings is not limited here. In this way, the number of second openings can be reduced, the difficulty of manufacturing the insulating support is reduced, and the manufacturing cost of the battery pack is reduced.

[0036] Based on the same utility model concept, the utility model embodiment further provides a battery pack, the implementation principle of the battery pack is similar to the implementation principle of the aforementioned battery pack, and the specific implementation method of the battery pack can refer to the aforementioned battery pack embodiment, and the repeated parts will not be repeated.

[0037] Specifically, the present invention provides a battery pack, such as Figure 7 As shown, it includes: a battery pack Z as described above. In this way, the structural performance of the battery pack can be improved, and the structural performance includes but is not limited to stiffness and mode.

[0038] Optionally, the battery pack also includes: a box, a battery management system, an electrical system, a thermal management system, etc. Among them, the battery pack, the battery management system, the electrical system, and the thermal management system are all placed in the box; the electrical system is used to realize the electrical connection between the battery pack, the battery management system, and the thermal management system; the battery management system is used to: monitor the voltage, current, temperature and other parameters of the battery pack, and regulate these parameters to improve the reliability of the battery pack; the thermal management system is used to: regulate the temperature of the battery pack under the control of the battery management system, thereby improving the safety of the battery pack.

[0039] Of course, the structures included in the battery pack are not limited to the structures listed above, and may also include other structures used in the battery pack that are well known to those skilled in the art, which are not specifically limited here.

[0040] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A battery pack, characterized in that: include: A plurality of single cells, an insulating support and a flexible circuit board; The single battery comprises: a shell, a cover plate and a battery cell, wherein the battery cell is arranged in a closed space formed by the shell and the cover plate, and the cover plate comprises: a body, and a first insulating layer covering a surface of the body on a side away from the battery cell; a first opening is arranged in the first insulating layer; The insulating support member is disposed between the cover plate of the single cell and the flexible circuit board, and the insulating support member is fixedly connected to the body through the first opening.

2. The battery pack according to claim 1, wherein: The insulating support is bonded to the body.

3. The battery pack according to claim 1, wherein: The insulating support member is made of a material including a metal member or a thermosetting resin with a second insulating layer disposed on the surface.

4. The battery pack according to claim 1, wherein: The thickness of the insulating support member is not less than 1.2 mm and not more than 5 mm.

5. The battery pack according to claim 1, wherein: An explosion-proof valve is provided in the cover plate; The insulating support member is provided with a second opening, and the second opening is used to avoid the explosion-proof valve.

6. The battery pack according to claim 5, characterized in that: There are a plurality of the second openings, and each of the second openings corresponds to one explosion-proof valve.

7. The battery pack according to claim 5, characterized in that: One second opening is provided, and the orthographic projection of the second opening on the surface of the cover plate surrounds the entire explosion-proof valve.

8. The battery pack according to any one of claims 1 to 7, characterized in that: The cover plate is provided with a positive pole and a negative pole; The insulating support is arranged between the positive pole and the negative pole.

9. The battery pack according to claim 8, characterized in that: The battery pack further comprises a plurality of bus bars, wherein the bus bars are located on a side of the cover plate away from the battery cell; The busbar and the insulating support have no overlap in their orthographic projections on the top surface of the battery pack.

10. A battery pack, characterized in that: include: A battery pack as claimed in any one of claims 1 to 9.

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