Battery pack and energy storage system

Abstract

The utility model relates to battery technology field especially, and more particularly relates to a battery pack and energy storage system. The battery pack includes box, battery group, plug -in spare and fuse. Among them, the box has the accommodation chamber. The battery group is set up to be multiple, and multiple battery groups are arranged in the accommodation chamber. The plug -in spare is set up on the box, and the plug -in spare includes positive high -voltage terminal and negative high -voltage terminal. The fuse is arranged in the accommodation chamber, and one end of fuse is electrically connected with the battery group, and the other end of fuse is connected with negative high -voltage terminal. The positive high -voltage terminal is configured as connecting load. The battery pack cancels the MSD module in traditional technology, not only has promoted the space utilization of battery pack, has improved the energy density of battery pack. Meanwhile, also reduced the additional joule heat produced in the working process of MSD module in traditional technology, improved the heat dissipation efficiency of battery pack, reduced the redundant structure of battery pack, reached the purpose of saving cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack and energy storage system. BACKGROUND

[0002] In the prior art battery pack design, the manual service disconnect (MSD) as a safety protection module of high voltage circuit is widely integrated in the battery system. However, the MSD module usually occupies a certain space in the battery pack, thereby directly restricting the improvement of the cell stacking efficiency and the overall energy density. At the same time, the internal connection structure of the MSD module is relatively complex, and the equivalent internal resistance reaches the level of 0.5 mΩ, thereby causing additional joule heat during the operation of the battery system, and reducing the heat dissipation efficiency of the system.

[0003] Therefore, it is urgent to design a battery pack and energy storage system to solve the above technical problems. SUMMARY

[0004] The first purpose of the utility model is to provide a battery pack, which can improve the space utilization and energy density of the battery pack, and improve the heat dissipation efficiency of the battery pack.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a battery pack, which comprises:

[0007] A box body having a containing chamber;

[0008] A plurality of battery groups are arranged in the containing chamber.

[0009] A plug-in part is arranged on the box body, and the plug-in part comprises a positive high-voltage terminal and a negative high-voltage terminal.

[0010] A fuse is arranged in the containing chamber, one end of the fuse is electrically connected with the battery group, and the other end of the fuse is connected with the negative high-voltage terminal; and the positive high-voltage terminal is configured to be connected with a load.

[0011] As an optional technical scheme of the battery pack, the containing chamber is further provided with a first connecting piece and a second connecting piece; one end of the first connecting piece is connected with the battery group, and the other end of the first connecting piece is connected with the fuse; one end of the second connecting piece is connected with the negative high-voltage terminal, and the other end of the second connecting piece is connected with the fuse.

[0012] As an optional technical scheme of the battery pack, the first connecting piece and / or the second connecting piece is a flexible copper bar.

[0013] As an optional technical solution for the battery pack, the connector further includes a first bracket, which is connected to the housing, and both the positive high-voltage terminal and the negative high-voltage terminal are disposed on the first bracket.

[0014] As an optional technical solution for the battery pack, the fuse is set at the same height as the negative high-voltage terminal.

[0015] As an optional technical solution for the battery pack, the first bracket is also provided with a communication terminal, which is configured to communicate with an external power supply device or the battery pack.

[0016] As an optional technical solution for the battery pack, the positive high-voltage terminal and the communication terminal are arranged along a first direction; the positive high-voltage terminal and the negative high-voltage terminal are arranged along a second direction; the first direction and the second direction are perpendicular to each other.

[0017] As an optional technical solution for the battery pack, the housing is provided with a maintenance window, which is positioned directly opposite the battery pack and the fuse; the battery pack also includes a maintenance plate, which is detachably mounted on the maintenance window.

[0018] As an optional technical solution for the battery pack, the inspection window is equipped with an explosion-proof valve and a fire sprinkler head, and a preset distance is set between the explosion-proof valve and the fire sprinkler head, the preset distance being not less than 80mm.

[0019] The second objective of this invention is to propose an energy storage system that can improve its space utilization and energy density, while also having high heat dissipation efficiency.

[0020] To achieve this objective, the present invention adopts the following technical solution:

[0021] This utility model provides an energy storage system, which includes multiple battery packs and a battery rack for fixing the multiple battery packs, wherein the battery packs are configured as described in any of the above optional technical solutions.

[0022] The beneficial effects of this utility model include at least the following:

[0023] This utility model provides a battery pack, which includes a housing, battery packs, connectors, and a fuse. The housing has a receiving chamber. Multiple battery packs are arranged within the receiving chamber. Connectors are mounted on the housing and include a positive high-voltage terminal and a negative high-voltage terminal. The fuse is located within the receiving chamber, with one end electrically connected to the battery pack and the other end connected to the negative high-voltage terminal; the positive high-voltage terminal is configured to connect a load.

[0024] In summary, the battery pack of this invention eliminates the MSD module. One end of the fuse is electrically connected to the battery pack, and the other end is directly connected to the negative high-voltage terminal, forming a negative circuit. When an abnormal current occurs in the battery pack, the fuse melts to cut off the high-voltage current, thus achieving the physical isolation function of the MSD module in traditional technology. By eliminating the MSD module, the battery pack of this invention not only improves the space utilization and energy density of the battery pack, but also reduces the extra Joule heat generated by the MSD module during operation, improving the heat dissipation efficiency of the battery pack. Furthermore, by eliminating the MSD module, the battery pack of this invention reduces redundant structures, achieving cost savings.

[0025] This invention also provides an energy storage system that can improve its space utilization and energy density, while also having high heat dissipation efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0028] Figure 2 This is a front view of the battery pack provided in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the battery pack provided in this embodiment of the utility model. Figure 1 ;

[0030] Figure 4 This is a schematic diagram of the internal structure of the battery pack provided in this embodiment of the utility model. Figure 2 ;

[0031] Figure 5 This is a schematic diagram of the structure of the first connector provided in this embodiment of the utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the second connector provided in an embodiment of the present utility model.

[0033] Figure Labels

[0034] 10. Housing; 11. Connecting block; 12. Mounting hole; 20. Battery pack; 21. BMU; 30. Connector; 31. Positive high-voltage terminal; 32. Negative high-voltage terminal; 33. First bracket; 34. Communication terminal; 40. Fuse; 41. First connector; 411. First connecting section; 412. Second connecting section; 413. First bend; 414. First mounting hole; 415. Second bend; 416. Second mounting hole; 42. Second connector; 421. Third connecting section; 422. Third bend; 423. Third mounting hole; 424. Fourth bend; 425. Fourth mounting hole; 43. Second bracket; 50. Inspection plate; 51. Explosion-proof valve. Detailed Implementation

[0035] 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, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] 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.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that the terms "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 used only for the convenience of describing this utility model and for 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. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can 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 top" of the second 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 second 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.

[0041] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0042] This embodiment provides a battery pack that can improve the space utilization and energy density of the battery pack, and enhance the heat dissipation efficiency of the battery pack.

[0043] like Figures 1-4 As shown, the battery pack mainly includes a housing 10, battery packs 20, connectors 30, and fuses 40. The housing 10 has a receiving chamber. Multiple battery packs 20 are arranged within the receiving chamber. Connectors 30 are mounted on the housing 10 and include a positive high-voltage terminal 31 and a negative high-voltage terminal 32. The fuse 40 is located within the receiving chamber, with one end electrically connected to the battery pack 20 and the other end connected to the negative high-voltage terminal 32; the positive high-voltage terminal 31 is configured to connect a load.

[0044] Based on the above design, the battery pack in this embodiment omits the MSD module. One end of the fuse 40 is electrically connected to the battery pack 20, and the other end of the fuse 40 is directly electrically connected to the negative high-voltage terminal 32, forming a negative circuit through the fuse 40. When an abnormal current occurs in the battery pack 20, the fuse 40 can melt to cut off the high-voltage current, thus achieving the physical isolation function of the MSD module in conventional technology. By eliminating the MSD module in conventional technology, the battery pack in this embodiment not only improves the space utilization rate and increases the energy density of the battery pack, but also reduces the additional Joule heat generated by the MSD module during operation, improving the heat dissipation efficiency of the battery pack. In addition, the battery pack in this embodiment omits the MSD module, reducing redundant structures and achieving cost savings.

[0045] Furthermore, in this embodiment, the fuse 40 is connected to the negative high-voltage terminal 32, while the positive high-voltage terminal 31 is used to connect the load. Since the voltage of the negative circuit is relatively lower than that of the positive circuit, the fuse 40 can minimize the risk of arcing when it operates (especially suitable for high-voltage platforms), thus improving the safety of the battery pack. In addition, the heat generated in the negative circuit is generally lower than that in the positive circuit; therefore, connecting the fuse 40 to the negative high-voltage terminal 32 makes the impact of the fuse 40's temperature rise on the system more controllable.

[0046] In this embodiment, a BMU 21 (Battery Management Unit) is also provided in the accommodating cavity. The BMU 21 is configured to monitor and manage the state of the battery pack 20, such as monitoring parameters such as voltage, current or temperature of the battery pack 20, performing battery equalization control, preventing overcharging and over-discharging, and improving the safety of the battery pack 20.

[0047] It is understandable that when the battery pack 20 in the battery pack is working normally, the current path is "positive terminal of battery pack 20 — positive high voltage terminal 31 — load — negative high voltage terminal 32 — fuse 40 — negative terminal of battery pack 20".

[0048] like Figures 3-4 As shown, in this embodiment, a first connector 41 and a second connector 42 are also provided in the accommodating cavity; one end of the first connector 41 is connected to the battery pack 20, and the other end is connected to the fuse 40; one end of the second connector 42 is connected to the negative high-voltage terminal 32, and the other end is connected to the fuse 40. By providing the first connector 41 and the second connector 42, the battery pack 20 and the fuse 40 are directly connected in series, eliminating the intermediate transfer link of the traditional MSD module, reducing the internal resistance of the circuit, and improving the system's energy conversion efficiency.

[0049] Optionally, in this embodiment, the first connector 41 and / or the second connector 42 are flexible copper busbars.

[0050] Specifically, such as Figure 5 As shown, the first connector 41 includes a first connecting segment 411 and a second connecting segment 412 connected to each other. The end of the first connecting segment 411 away from the second connecting segment 412 forms a first bend 413, and the first bend 413 is provided with a first mounting hole 414. The end of the second connecting segment 412 away from the first connecting segment 411 forms a second bend 415, and the second bend 415 is provided with a second mounting hole 416. The battery pack also includes a first fixing member and a second fixing member. The first fixing member passes through the first mounting hole 414 and is connected to the positive busbar of the battery pack 20. The second fixing member passes through the second mounting hole 416 and is connected to the input terminal of the fuse 40. The first bend 413 and the second bend 415 facilitate connection with the battery pack 20 and the fuse 40, improving assembly efficiency.

[0051] like Figure 6 As shown, the second connector 42 includes a third connecting section 421, with a third bend 422 and a fourth bend 424 formed at opposite ends of the third connecting section 421. A third mounting hole 423 is provided on the third bend 422, and a fourth mounting hole 425 is provided on the fourth bend 424. The battery pack also includes a third fixing member and a fourth fixing member. The third fixing member passes through the third mounting hole 423 and connects to the negative high-voltage terminal 32; the fourth fixing member passes through the fourth mounting hole 425 and connects to the output terminal of the fuse 40. The third bend 422 and the fourth bend 424 facilitate connection to the negative high-voltage terminal 32 and the fuse 40, improving assembly efficiency.

[0052] Optionally, the first, second, third, and fourth fixing members in this embodiment can all be bolts, which facilitates disassembly and replacement of the first connector 41 and the second connector 42.

[0053] In some alternative embodiments, one end of the first connector 41 is fixedly connected to the positive busbar of the battery pack 20 by laser welding or bolts, and the other end is connected to the input terminal of the fuse 40 through a copper-aluminum composite transition joint. One end of the second connector 42 is integrated with the negative high-voltage terminal 32 by a crimping process, and the other end is connected to the output terminal of the fuse 40 through a silver-plated copper busbar.

[0054] like Figures 3-4As shown, the connector 30 also includes a first bracket 33, which is connected to the housing 10. The positive high-voltage terminal 31 and the negative high-voltage terminal 32 are both disposed on the first bracket 33. Exemplarily, the first bracket 33 is integrally injection molded from nylon and glass fiber reinforced material and is fixed to the side wall of the housing 10 by bolts. The positive high-voltage terminal 31 and the negative high-voltage terminal 32 are disposed on its surface.

[0055] Optionally, in this embodiment, the positive high-voltage terminal 31 is embedded with a copper alloy female base, and the exposed portion is covered with an insulating cover plate. The negative high-voltage terminal 32 can be connected to the output terminal of the fuse 40 and is secured to the first bracket 33 by countersunk screws.

[0056] Furthermore, in this embodiment, the fuse 40 and the negative high-voltage terminal 32 are set at the same height, which can reduce the distance between the fuse 40 and the negative high-voltage terminal 32, thereby minimizing the connection path, reducing the length of the flexible copper busbar, and reducing the circuit inductance.

[0057] like Figures 1-4 As shown, the first bracket 33 in this embodiment is also provided with a communication terminal 34, which is configured to communicate with an external power supply device or battery pack 20. Exemplarily, the communication terminal 34 has a built-in CAN connector, which uses a metal shell with an IP69K waterproof rating, and its pins are connected to the BMS board of the battery pack 20 via an FPC flexible board.

[0058] Optionally, in this embodiment, the positive high-voltage terminal 31 and the communication terminal 34 are arranged along a first direction with a spacing of 30mm; the positive high-voltage terminal 31 and the negative high-voltage terminal 32 are arranged along a second direction with a spacing of 20mm; the first and second directions are perpendicular to each other, thus forming a four-corner positioning layout. This orthogonal layout ensures that the external wiring harness insertion directions do not interfere with each other, improves the space utilization of the first bracket 33, and meets the space requirements for insertion and removal operations. The directions of the positive high-voltage terminal 31 and the negative high-voltage terminal 32 are perpendicular to the communication terminal 34, avoiding the risk of short circuits due to misinsertion caused by insertion angle deviation. The first direction is... Figure 2 The middle X-axis direction, the second direction is Figure 2 In the Y-axis direction.

[0059] Since the battery pack in this embodiment does not require an MSD module, there is no need to create positioning holes for fixing the MSD module on the first bracket 33. This improves the mechanical strength of the first bracket 33 and reduces its deformation under vibration conditions. It also simplifies the manufacturing process of the first bracket 33 and saves costs.

[0060] like Figure 1As shown, in this embodiment, a second bracket 43 is also provided in the accommodating cavity. The second bracket 43 is fixed to the base plate by bolts. The fuse 40 is fixed to the second bracket 43 by insulating posts. The fuse 40 is used to melt in time when the current of the battery pack rises abnormally, thereby protecting the circuit.

[0061] like Figure 1 As shown, the housing 10 in this embodiment is provided with a maintenance window, which is positioned directly opposite the BMU 21 and fuse 40 of the battery pack 20. The battery pack also includes a maintenance plate 50, which is detachably mounted on the maintenance window. After removing the maintenance plate 50, the fuse 40 can be directly replaced or the BMU 21 of the battery pack 20 can be tested, thereby improving maintenance efficiency.

[0062] Optionally, the dimensions of the inspection plate 50 in this embodiment can be set to 530mm × 192.5mm × 26mm.

[0063] Furthermore, the inspection plate 50 is equipped with an explosion-proof valve 51 and a fire sprinkler head (not shown in the figure). A preset distance is set between the explosion-proof valve 51 and the fire sprinkler head, which is not less than 80mm, so as to prevent the shock wave from directly triggering the fire sprinkler head when the explosion-proof valve 51 is activated, and to ensure the accurate and directional release of the extinguishing agent.

[0064] For example, the explosion-proof valve 51 has a burst pressure of 0.2 MPa, a response time of ≤2 ms, and the valve body axis is inclined at a 45° angle to the horizontal plane; the fire sprinkler head is equipped with heptafluoropropane extinguishing agent, has a spray coverage angle of 120°, and is 100 mm away from the center of the explosion-proof valve 51.

[0065] like Figure 1 As shown, in this embodiment, the housing 10 is provided with a connecting block 11, and the connecting block 11 is provided with a mounting hole 12 for detachable connection with the vehicle bracket.

[0066] This embodiment also provides an energy storage system, which can be an energy storage container or an energy storage battery cabinet. The energy storage system includes a battery rack and multiple battery packs disposed on the battery rack, and each battery pack includes the battery pack provided in the above embodiment.

[0067] Because the energy storage system has the aforementioned battery pack, it can improve its space utilization and energy density, while also having high heat dissipation efficiency.

[0068] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0069] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A battery pack, characterized in that, include: The housing (10) has a receiving chamber; Battery pack (20), wherein multiple battery packs (20) are provided and multiple battery packs (20) are provided in the accommodating cavity; A connector (30) is disposed on the housing (10), and the connector (30) includes a positive high voltage terminal (31) and a negative high voltage terminal (32); A fuse (40) is disposed in the accommodating cavity, and one end of the fuse (40) is electrically connected to the battery pack (20), and the other end of the fuse (40) is connected to the negative high-voltage terminal (32); the positive high-voltage terminal (31) is configured to connect a load.

2. The battery pack according to claim 1, characterized in that, The accommodating cavity is also provided with a first connector (41) and a second connector (42); one end of the first connector (41) is connected to the battery pack (20), and the other end is connected to the fuse (40); one end of the second connector (42) is connected to the negative high voltage terminal (32), and the other end is connected to the fuse (40).

3. The battery pack according to claim 2, characterized in that, The first connector (41) includes a first connecting segment (411) and a second connecting segment (412) that are connected to each other. The end of the first connecting segment (411) away from the second connecting segment (412) forms a first bend (413), and the first bend (413) is provided with a first mounting hole (414). The end of the second connecting segment (412) away from the first connecting segment (411) forms a second bend (415), and the second bend (415) is provided with a second mounting hole (416). The battery pack also includes a first fixing member and a second fixing member. The first fixing member passes through the first mounting hole (414) and is connected to the battery pack (20). The second fixing member passes through the second mounting hole (416) and is connected to the fuse (40).

4. The battery pack according to claim 2, characterized in that, The second connector (42) includes a third connecting section (421), wherein a third bend (422) and a fourth bend (424) are formed at opposite ends of the third connecting section (421), a third mounting hole (423) is provided on the third bend (422), and a fourth mounting hole (425) is provided on the fourth bend (424); The battery pack also includes a third fixing member and a fourth fixing member. The third fixing member passes through the third mounting hole (423) and is connected to the negative high voltage terminal (32). The fourth fixing member passes through the fourth mounting hole (425) and is connected to the fuse (40).

5. The battery pack according to claim 2, characterized in that, The first connector (41) and / or the second connector (42) are flexible copper busbars.

6. The battery pack according to claim 1, characterized in that, The connector (30) also includes a first bracket (33), which is connected to the housing (10). The positive high voltage terminal (31) and the negative high voltage terminal (32) are both disposed on the first bracket (33).

7. The battery pack according to claim 6, characterized in that, The fuse (40) is set at the same height as the negative high voltage terminal (32).

8. The battery pack according to claim 6, characterized in that, The first bracket (33) is also provided with a communication terminal (34), which is configured to communicate with an external power supply device or the battery pack (20) for data communication.

9. The battery pack according to claim 8, characterized in that, The positive high voltage terminal (31) and the communication terminal (34) are arranged along a first direction; the positive high voltage terminal (31) and the negative high voltage terminal (32) are arranged along a second direction; the first direction and the second direction are perpendicular to each other.

10. The battery pack according to claim 1, characterized in that, The housing (10) is provided with an inspection window, which is located directly opposite the battery pack (20) and the fuse (40); the battery pack also includes an inspection plate (50), which is detachably covered on the inspection window.

11. The battery pack according to claim 10, characterized in that, The inspection plate (50) is equipped with an explosion-proof valve (51) and a fire sprinkler head. A preset distance is provided between the explosion-proof valve (51) and the fire sprinkler head, and the preset distance is not less than 80mm.

12. An energy storage system, characterized in that, The energy storage system includes multiple battery packs and a battery rack for fixing the multiple battery packs, wherein the battery packs are configured as described in any one of claims 1-11.

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