Battery pack and vehicle

Abstract

The application relates to the technical field of a battery pack and specifically provides a battery pack and a carrier. The battery pack comprises a frame, a battery pack, a first circuit breaking unit, a second circuit breaking unit and an external interface; the battery pack is arranged in the frame and surrounds a first space and a second space with the frame; the battery pack is provided with a first lead-out end and a second lead-out end, the first lead-out end is close to the first space, and the second lead-out end is close to the second space; the first circuit breaking unit is arranged in the first space and is electrically connected with the first lead-out end; the second circuit breaking unit is arranged in the second space and is electrically connected with the second lead-out end; and the first circuit breaking unit and the second circuit breaking unit are electrically connected with the external interface. In the application, the two circuit breaking units are arranged in two separate spaces and are respectively electrically connected with the two lead-out ends of the battery pack, so that the distance between the two lead-out ends can meet the electrical requirements, the configuration flexibility is high, the space utilization rate is high, and the volume energy density of the battery pack is improved.

Description

Technical Field

[0001] This application relates to the technical field of battery packs, and specifically proposes a battery pack and a carrier. Background Technology

[0002] In the design process of power battery packs for new energy vehicles, the battery pack includes a battery pack circuit breaker unit, which is mainly used to control the opening and closing of the high-voltage circuit, the distribution of high-voltage power, the real-time detection of the high-voltage circuit current value, and the current limiting during vehicle pre-charging.

[0003] Specifically, current battery packs typically connect battery cells in series or parallel to bring out the total positive and negative terminals, and then electrically connect both the positive and negative terminals to an integrated battery pack circuit breaker unit. This means that the battery pack circuit breaker unit occupies a large space. Moreover, to ensure that sufficient gaps are reserved between the positive and negative terminals to meet the creepage distance requirements, the volume of the battery pack circuit breaker unit will be further increased, thereby reducing the space utilization rate within the battery pack and lowering the volumetric energy density of the battery pack.

[0004] In addition, some battery packs do not have a large, continuous space for the installation of an integrated battery pack circuit breaker unit. Instead, the battery pack has two or more smaller, scattered spaces, making it difficult to apply the above-mentioned solutions. Utility Model Content

[0005] The purpose of this application is to solve at least some of the technical problems mentioned above, and this purpose is achieved through the following technical solutions:

[0006] In a first aspect, this application proposes a battery pack, which includes a frame, a battery pack, a first circuit breaker unit, a second circuit breaker unit, and an external interface; the battery pack is disposed within the frame and forms a first space and a second space with the frame; the battery pack has a first lead-out end and a second lead-out end, the first lead-out end being close to the first space and the second lead-out end being close to the second space; the first circuit breaker unit is disposed within the first space and electrically connected to the first lead-out end; the second circuit breaker unit is disposed within the second space and electrically connected to the second lead-out end; the first circuit breaker unit and the second circuit breaker unit are respectively electrically connected to the external interface.

[0007] In some embodiments, the first circuit breaker unit has a first input terminal and a first output terminal. The first input terminal is electrically connected to the first lead-out terminal, and the first output terminal is electrically connected to the external interface. The battery pack, the first lead-out terminal, the first input terminal, the first circuit breaker unit, the first output terminal, and the external interface form a first conductive path.

[0008] In some embodiments, the second circuit breaker unit has a second input terminal and a second output terminal. The second input terminal is electrically connected to the second lead-out terminal, and the second output terminal is electrically connected to the external interface. The battery pack, the second lead-out terminal, the second input terminal, the second circuit breaker unit, the second output terminal, and the external interface form a second conductive path.

[0009] In some embodiments, the distance between any two points between the first conductive path and the second conductive path is not less than a preset creepage distance.

[0010] In some embodiments, the first conductive path and the second conductive path at least partially overlap in projection, and are staggered along the projection direction.

[0011] In some embodiments, the external interface is located in the first space, and a first conductive bus and a second conductive bus are separately arranged between the second output terminal and the external interface; the first conductive bus is electrically connected to the second output terminal, the second conductive bus is electrically connected to the external interface, and the first conductive bus and the second conductive bus are electrically connected.

[0012] In some embodiments, the first circuit breaker unit is provided with a support and a column, with the column disposed on the support; the first conductive busbar and the second conductive busbar are both sleeved on the column and are connected to each other.

[0013] In some embodiments, the support is an insulating structure and the column is a conductive structure.

[0014] In some embodiments, the first circuit breaker unit is provided with a first mounting portion for connection to the frame, and the first mounting portion is provided with reinforcing ribs; and / or, the second circuit breaker unit is provided with a second mounting portion for connection to the frame, and the second mounting portion is provided with reinforcing ribs.

[0015] Secondly, this application proposes a vehicle that includes the battery pack of the first aspect.

[0016] The technical solution proposed in this application has at least the following technical effects:

[0017] In this application, the frame and the battery pack cooperate to enclose the first space and the second space, and the integrated circuit breaker unit is replaced with the split first circuit breaker unit and the second circuit breaker unit. The two circuit breaker units are respectively located in two separate spaces, and they are electrically connected to the two leads of the battery pack respectively. This can ensure that the creepage distance between the two leads meets the electrical requirements, and can make full use of the space of the battery pack, with high configuration flexibility, large space utilization, and improved volumetric energy density of the battery pack. Attached Figure Description

[0018] To better integrate the content illustrated in the accompanying drawings with the description of the specific embodiments, a brief introduction to the drawings is provided below. It is understood that the accompanying drawings mentioned below are merely schematic illustrations of some embodiments of the relevant technical solutions and the technical solutions of this application. Without creative effort, those skilled in the art can create drawings illustrating other embodiments.

[0019] Specifically, the annotations for the accompanying drawings are as follows:

[0020] Figure 1 This is a top view schematic diagram of the battery pack described in some embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the battery pack in the first space according to some embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the structure of the battery pack in the second space according to some embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the first circuit breaker unit described in some embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the structure of the second circuit breaker unit described in some embodiments of this application.

[0025] Specifically, the annotations for the figure marks in the instruction manual are as follows:

[0026] 10. Frame; 20. Battery pack; 201. First lead-out terminal; 202. Second lead-out terminal; 30. First circuit breaker unit; 301. First input terminal; 302. First output terminal; 303. Support part; 304. Column; 305. First mounting part; 306. Reinforcing rib; 40. Second circuit breaker unit; 401. Second input terminal; 402. Second output terminal; 403. Second mounting part; 50. External interface; 60. Battery management system; 70. Liquid circuit interface; 80. First conductive bar; 90. Second conductive bar; 100. Third conductive bar; A. First space; B. Second space. Detailed Implementation

[0027] To make the embodiments of this application clearer, they will be described below in conjunction with the accompanying drawings. It should be understood that the content mentioned below represents only some embodiments of this application, and not all embodiments are listed exhaustively. Therefore, other embodiments that can be obtained based on the following embodiments without any inventive effort fall within the protection scope of this application.

[0028] It should be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to impose strict limitations on the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "the" to modify a feature does not preclude the possibility that the feature may be plural in other embodiments.

[0029] It should be understood that the terms "comprising," "including," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of other features in the embodiment. Similarly, the use of terms such as "first," "second," etc., to describe multiple features only indicates the distinction between one feature and another, and such terms do not imply order or sequence unless explicitly stated in the context.

[0030] It should be understood that, unless the context clearly indicates otherwise, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.

[0031] In addition, for ease of description, the text will use terms of spatial relative relationship to describe the position of one feature relative to another feature, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.

[0032] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.

[0033] Firstly, referring to Figures 1 to 3 This application provides an embodiment of a battery pack, which includes a frame 10, a battery pack 20, a first circuit breaker unit 30, a second circuit breaker unit 40, and an external interface 50. The battery pack 20 is disposed within the frame 10 and forms a first space A and a second space B with the frame 10. The battery pack 20 is provided with a first lead-out end 201 and a second lead-out end 202, with the first lead-out end 201 close to the first space A and the second lead-out end 202 close to the second space B. The first circuit breaker unit 30 is disposed within the first space A and electrically connected to the first lead-out end 201. The second circuit breaker unit 40 is disposed within the second space B and electrically connected to the second lead-out end 202. The first circuit breaker unit 30 and the second circuit breaker unit 40 are respectively electrically connected to the external interface 50.

[0034] In this embodiment, the frame 10 and the battery pack 20 cooperate to enclose the first space A and the second space B, and the integrated circuit breaker unit is replaced with the split first circuit breaker unit 30 and the second circuit breaker unit 40. The two circuit breaker units are respectively located in two separate spaces, and they are electrically connected to the two leads of the battery pack 20 respectively. This can ensure that the creepage distance between the two leads meets the electrical requirements, and can make full use of the space of the battery pack, with high configuration flexibility, large space utilization, and improved volumetric energy density of the battery pack.

[0035] Optionally, refer to Figure 1 The battery pack 20 is provided in multiple ways. Each battery pack 20 is composed of multiple individual cells connected in series and / or in parallel. The multiple battery packs 20 are also connected in series and / or in parallel, and after being combined, a first lead-out terminal 201 and a second lead-out terminal 202 are led out.

[0036] Specifically, in some embodiments, the first lead-out terminal 201 is the negative lead-out terminal, and the second lead-out terminal 202 is the positive lead-out terminal; correspondingly, the first circuit breaker unit 30 is the negative circuit breaker unit, which may include a shunt, a relay, etc.; the second circuit breaker unit 40 is the positive circuit breaker unit, which may include a relay, a resistor, etc. The specific working principle of the circuit breaker unit will not be elaborated here.

[0037] In some embodiments, the first circuit breaker unit 30 is provided with a first input terminal 301 and a first output terminal 302. The first input terminal 301 is electrically connected to the first lead-out terminal 201, and the first output terminal is electrically connected to the external interface. The battery pack 20, the first lead-out terminal 201, the first input terminal 301, the first circuit breaker unit 30, the first output terminal 302, and the external interface 50 form a first conductive path.

[0038] In this embodiment, the first conductive path can be referred to Figure 2 As indicated by the multiple arrows, it should be understood that the external interface 50 is the electrical interface of the battery pack to the outside. The first lead 201 and the second lead 202 of the battery pack 20 must be electrically connected to the external interface 50. The first conductive path achieves the purpose of electrically connecting the first lead 201 of the battery pack 20 to the external interface 50.

[0039] In some embodiments, the second circuit breaker unit 40 is provided with a second input terminal 401 and a second output terminal 402. The second input terminal 401 is electrically connected to the second lead-out terminal 202, and the second output terminal 402 is electrically connected to the external interface 50. The battery pack 20, the second lead-out terminal 202, the second input terminal 401, the second circuit breaker unit 40, the second output terminal 402, and the external interface 50 form a second conductive path.

[0040] In this embodiment, the second conductive path can be referred to Figure 1As shown by the multiple arrows, the second conductive path achieves the purpose of electrically connecting the second lead 202 of the battery pack 20 to the external interface 50.

[0041] In some embodiments, the distance between any two points between the first conductive path and the second conductive path is not less than a preset creepage distance.

[0042] In this embodiment, the distance between any two points between the first conductive path and the second conductive path should be kept from being too close, so as to ensure that electrical requirements are met, prevent short circuits, and further ensure battery safety.

[0043] In some embodiments, refer to Figure 1 and Figure 2 The first conductive path and the second conductive path at least partially overlap in projection, and the two are staggered along the projection direction.

[0044] In this embodiment, combined with Figure 1 and Figure 2 The second conductive path and the first conductive path have a portion that overlaps in projection along the thickness direction of the battery pack. The two have a gap along the thickness direction of the battery pack, that is, they are staggered to avoid mutual interference due to being too close.

[0045] In some embodiments, refer to Figure 2 An external interface 50 is located in the first space A. A first conductive bus 80 and a second conductive bus 90 are separately arranged between the second output terminal 402 and the external interface 50. The first conductive bus 80 is electrically connected to the second output terminal 402, and the second conductive bus 90 is electrically connected to the external interface 50. The first conductive bus 80 and the second conductive bus 90 are also electrically connected.

[0046] In this embodiment, the external interface 50 is located in the first space A. The distance between the second output terminal 402 and the external interface 50 is relatively far. If a single conductive busbar is used to electrically connect the two, the conductive busbar will be too long and inconvenient to assemble. However, in this embodiment, the first conductive busbar 80 and the second conductive busbar 90 are connected in segments, making assembly more flexible and convenient.

[0047] Specifically, in some embodiments, reference is made to Figure 2 The first output terminal 302 is electrically connected to the external interface 50 through the third conductive bus 100; optionally, the first conductive bus 80, the second conductive bus 90 and the third conductive bus 100 are aluminum bus or copper bus.

[0048] In some embodiments, combined with Figure 2 and Figure 4 The first circuit breaker unit 30 is provided with a support part 303 and a column 304, with the column 304 located on the support part 303; the first conductive bus 80 and the second conductive bus 90 are both sleeved on the column 304, and the two are connected together.

[0049] In this embodiment, a support 303 and a column 304 are provided on the first circuit breaker unit 30, forming a connection and fixing point between the first conductive busbar 80 and the second conductive busbar 90, which is a reasonable design. Specifically, the first conductive busbar 80 and the second conductive busbar 90 are sleeved on the column 304 and overlap each other, thereby realizing the electrical connection between the two. The column 304 positions the connection between the first conductive busbar 80 and the second conductive busbar 90, and the support 303 supports the column 304 and the connection between the first conductive busbar 80 and the second conductive busbar 90.

[0050] In some embodiments, the support portion 303 is an insulating structure, and the column 304 is a conductive structure.

[0051] In this embodiment, the column 304 is a conductive structure. The first conductive busbar 80, the column 304, and the second conductive busbar 90 are electrically connected and form part of the second conductive path. Specifically, the first conductive busbar 80 and the second conductive busbar 90, as well as the two and the column 304, can be welded to enhance the electrical conductivity and structural strength, and to prevent them from separating and causing an open circuit.

[0052] In addition, the support part 303 is an insulating structure, thereby achieving the insulation effect between the second conductive path and the first circuit breaking unit 30, and avoiding mutual interference between the second conductive path and the first conductive path.

[0053] In some embodiments, refer to Figure 4 The first circuit breaker unit 30 is provided with a first mounting part 305, which is used to connect to the frame 10. The first mounting part 305 is provided with reinforcing ribs 306; and / or, refer to Figure 5 The second circuit breaker unit 40 is provided with a second mounting part 403, which is used to connect to the frame 10. The second mounting part 403 is provided with reinforcing ribs 306.

[0054] In this embodiment, the first mounting part 305 can be fixedly connected to the first circuit breaker unit 30 and the base plate of the frame 10 using fasteners. The reinforcing rib 306 can increase the structural strength at the connection point and ensure the stability of the structure. Similarly, the second mounting part 403 can be fixedly connected to the second circuit breaker unit 40 and the base plate of the frame 10 using fasteners. It should be understood that not providing the reinforcing rib 306 is also a preferable implementation method.

[0055] Secondly, this application proposes a vehicle that includes the battery pack of the first aspect. Therefore, the vehicle of the second aspect possesses all the technical effects of the battery pack of the first aspect, the specific technical effects of which will not be elaborated further.

[0056] Optionally, the vehicle may be a hybrid vehicle, a new energy vehicle, or a flying car.

[0057] It should be noted that the battery pack in this embodiment may also include other components, such as the liquid circuit interface 70 located in the first space A, the battery management system 60 located in the second space B, etc. Other components will not be described in detail here.

[0058] In particular, the term "and / or" in this application should be understood as follows:

[0059] In the first case, the term “and / or” between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.

[0060] In the second case, the term "and / or" between the last two of three or more subjects means including at least any one of the subjects. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) first subject and second subject and no third subject; (5) first subject and third subject and no second subject; (6) second subject and third subject and no first subject; and (7) first subject, second subject and third subject;

[0061] Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.

[0062] Finally, although the embodiments of this application have been described above in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the concept of this application, and such modifications and variations all fall within the scope of protection of this application.

Claims

1. A battery pack, characterized in that, include: Frame (10); A battery pack (20) is disposed within the frame (10) and forms a first space (A) and a second space (B) with the frame (10); the battery pack (20) is provided with a first lead-out end (201) and a second lead-out end (202), the first lead-out end (201) being close to the first space (A) and the second lead-out end (202) being close to the second space (B); The first circuit breaker unit (30) is located in the first space (A) and is electrically connected to the first lead-out terminal (201); The second circuit breaker unit (40) is located in the second space (B) and is electrically connected to the second lead-out terminal (202); External interface (50), the first circuit breaker unit (30) and the second circuit breaker unit (40) are electrically connected to the external interface (50).

2. The battery pack according to claim 1, characterized in that, The first circuit breaker unit (30) is provided with a first input terminal (301) and a first output terminal (302). The first input terminal (301) is electrically connected to the first lead-out terminal (201), and the first output terminal (302) is electrically connected to the external interface (50). The battery pack (20), the first lead-out terminal (201), the first input terminal (301), the first circuit breaker unit (30), the first output terminal (302), and the external interface (50) form a first conductive path.

3. The battery pack according to claim 2, characterized in that, The second circuit breaker unit (40) is provided with a second input terminal (401) and a second output terminal (402). The second input terminal (401) is electrically connected to the second lead-out terminal (202), and the second output terminal (402) is electrically connected to the external interface (50). The battery pack (20), the second lead-out terminal (202), the second input terminal (401), the second circuit breaker unit (40), the second output terminal (402), and the external interface (50) form a second conductive path.

4. The battery pack according to claim 3, characterized in that, The distance between any two points on the first conductive path and the second conductive path is not less than the preset creepage distance.

5. The battery pack according to claim 4, characterized in that, The first conductive path and the second conductive path at least partially overlap in projection, and the two are staggered along the projection direction.

6. The battery pack according to claim 3, characterized in that, The external interface (50) is located in the first space (A), and the second output terminal (402) and the external interface (50) are provided with a first conductive bus (80) and a second conductive bus (90) that are separately arranged; The first conductive bus (80) is electrically connected to the second output terminal (402), the second conductive bus (90) is electrically connected to the external interface (50), and the first conductive bus (80) is electrically connected to the second conductive bus (90).

7. The battery pack according to claim 6, characterized in that, The first circuit breaker unit (30) is provided with a support part (303) and a column (304), wherein the column (304) is provided on the support part (303); The first conductive bus (80) and the second conductive bus (90) are both sleeved on the column (304) and are connected to each other.

8. The battery pack according to claim 7, characterized in that, The support (303) is an insulating structure, and the column (304) is a conductive structure.

9. The battery pack according to any one of claims 1 to 8, characterized in that, The first circuit breaker unit (30) is provided with a first mounting part (305), which is used to connect to the frame (10), and the first mounting part (305) is provided with a reinforcing rib (306); And / or, the second circuit breaker unit (40) is provided with a second mounting part (403), the second mounting part (403) is used to connect to the frame (10), and the second mounting part (403) is provided with reinforcing ribs (306).

10. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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