Battery pack and battery system

Abstract

The utility model provides a battery pack and a battery system, relates to the technical field of batteries, and aims to improve the energy density of the battery pack. The battery pack comprises a shell, a battery management system and at least one battery module, a containing cavity is formed in the shell, the shell comprises a plug-in board, and a plug-in port is formed in the plug-in board. The battery module is located in the containing cavity. The battery management system comprises a battery management module and an acquisition wire harness, the battery management module is located between the battery module and the patch board, the battery management module is electrically connected with the battery module, the acquisition wire harness is electrically connected with the battery management module, and the acquisition wire harness is led to the jack. The battery management module is arranged between the plug board of the shell and the battery module, so that the space in the shell is reasonably utilized. The plug board is provided with the socket, so that the collection wire harness electrically connected with the battery management module can be conveniently led out to the socket, the length of the collection wire harness is reduced, and the collection wire harness is prevented from influencing the arrangement of the battery module.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and a battery system. Background Art

[0002] Battery systems are the power supply for electric vehicles, electric trains, new energy heavy-duty trucks, and other equipment. Typically, a battery system consists of one or more battery packs. A battery pack includes a housing, battery modules mounted within the housing, and a battery management system. The battery modules power the battery pack, and the battery management system is electrically connected to the battery modules to monitor the battery pack's status.

[0003] However, battery packs have limited energy density. Utility Model Content

[0004] The present application provides a battery pack and a battery system for maximizing the utilization of the space within a housing and improving the energy density of the battery pack.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] One aspect of the present application provides a battery pack, comprising a housing, a battery management system, and at least one battery module;

[0007] The housing has a receiving cavity therein, a connector board is provided on one side of the housing, and a connector port is provided on the connector board;

[0008] The battery module is located in the accommodating cavity;

[0009] The battery management system includes a battery management module and a collection harness. The battery management module is located between the battery module and the connector board. The battery management module is electrically connected to the battery module. The collection harness is electrically connected to the battery management module. The collection harness is led out to the connector.

[0010] In a possible implementation, the battery pack includes at least two battery modules, the battery modules are spaced apart along the length direction of the shell, and any two adjacent battery modules are electrically connected.

[0011] In one possible implementation, the battery pack also includes at least two groups of flexible circuit boards, each group of the flexible circuit boards is respectively arranged at the bottom of the corresponding battery module, any two adjacent groups of the flexible circuit boards are electrically connected through connectors, and the flexible circuit boards close to the connector board are electrically connected to the battery management module.

[0012] In a possible implementation, the shell includes a box body and a box cover, and the box body and the box cover cover each other to define the accommodating cavity.

[0013] In a possible implementation, the box body includes a bottom plate and a first side plate and a second side plate arranged opposite to each other along a first direction, and the box cover includes a top cover plate and a third side plate and a fourth side plate arranged opposite to each other along a second direction;

[0014] The bottom plate has a first long strip convex edge and a second long strip convex edge arranged opposite to each other along the second direction, and the third side plate and the fourth side plate are respectively connected to the first long strip convex edge and the second long strip convex edge;

[0015] The first side panel has a first annular convex edge extending toward the second side panel, the second side panel has a second annular convex edge extending toward the first side panel, and both ends of the top cover panel are respectively connected to the first elongated convex edge and the second elongated convex edge.

[0016] In a possible implementation, the outer surface of the box cover is provided with a plurality of polygonal protrusions.

[0017] In a possible implementation, the battery module is mounted on a bottom plate of the housing.

[0018] In a possible implementation, the battery module is bonded to the base plate by a thermally conductive structural adhesive.

[0019] In a possible implementation, the battery module includes a first end plate, a second end plate, a cell assembly, a first tie rod assembly, and a second tie rod assembly;

[0020] The battery core assembly is sandwiched between the first end plate and the second end plate;

[0021] The first pull rod assembly is provided through one end of the first end plate and the second end plate close to the patch panel;

[0022] The second pull rod assembly is provided through the first end plate and the second end plate at one end away from the connector plate.

[0023] Another aspect of the present application provides a battery system, the battery system comprising the battery pack according to any one of the above items;

[0024] The number of the battery pack is one;

[0025] Alternatively, there are multiple battery packs, and the multiple battery packs are combined in series and / or in parallel.

[0026] The battery pack and battery system provided by this application have the following beneficial effects:

[0027] The battery pack includes a housing, a battery management system, and at least one battery module. The housing has a housing cavity so that the battery module can be installed in the housing cavity. The battery management system includes a battery management module and a collection harness. Compared with related technologies, the battery pack and battery system provided by this application arrange the battery management module between the connector board of the housing and the battery module, so that the battery management module utilizes the gap between the connector board and the battery module and reasonably utilizes the space in the housing. The connector board is provided with a socket, so that the collection harness electrically connected to the battery management module can be easily led out to the socket, thereby reducing the length of the collection harness and preventing the collection harness from affecting the layout of the battery modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 A schematic diagram of the structure of the battery pack provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the structure of the battery pack provided in an embodiment of the present application with the box cover omitted;

[0031] Figure 3 A schematic structural diagram of the battery module provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 10-housing;

[0034] 11-connector board; 12-box; 121-bottom plate; 1211-first long strip convex edge;

[0035] 122-first side plate; 1221-first annular flange; 123-second side plate;

[0036] 1231-second annular flange; 13-box cover; 131-top cover plate; 132-third side plate;

[0037] 133- fourth side plate; 134- polygonal protrusion;

[0038] 20-Battery management system;

[0039] 30, 30a, 30b-battery module;

[0040] 31-first end plate; 32-second end plate; 33-battery cell assembly. DETAILED DESCRIPTION

[0041] Battery packs have a technical problem of limited energy density. This problem arises because part of the space inside the battery pack housing is occupied by the battery management system and its connecting wires, leaving limited space for arranging the battery modules and, in turn, limiting the battery pack's energy density.

[0042] In response to the above technical problems, the present application provides a battery pack and battery system. By disposing a battery management module between the connector board and the battery module of the housing, the battery management module utilizes the gap between the connector board and the battery module, making rational use of the space within the housing. The connector board has a socket, which allows the collection harness electrically connected to the battery management module to be easily led out to the socket, thereby reducing the length of the collection harness and preventing the collection harness from affecting the layout of the battery modules. This prevents part of the space within the housing from being occupied by the battery management system and its connecting wires, thereby improving the energy density of the battery pack.

[0043] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0044] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a battery pack, which includes a housing 10 , a battery management system 20 and at least one battery module 30 . The battery management system 20 and the battery module 30 are both installed in the housing 10 .

[0045] The housing 10 is used to protect and support the battery management system 20 and battery module 30 inside the housing 10. The material of the housing 10 includes but is not limited to metal materials such as steel and aluminum. The housing 10 has a receiving cavity, which is the receiving space for the battery management system 20 and the battery module 30. One side of the housing 10 has a connector board 11, Figure 1 and Figure 2 The connector board 11 can be the left side panel of the housing 10. The connector board 11 can be a structural component for connecting the battery pack to the outside world. The connector board 11 has a socket, which is an interface in the battery pack that connects the inside and outside of the housing.

[0046] The battery module 30 is the portion of the battery pack used for power supply. The battery module 30 may include multiple cells, which may be connected in series, in parallel, or in a combination of these. There may be one or more battery modules 30. The battery module 30 is located within the housing, for example, mounted at the bottom of the housing 10.

[0047] The battery management system 20 is the monitoring and management unit within the battery pack. It includes a battery management module and a data acquisition harness. The battery management module is electrically connected to the battery module 30, enabling it to monitor signals such as the voltage and temperature of the battery module 30. The data acquisition harness is electrically connected to the battery management module and extends to a connector on the patch panel 11, allowing devices such as controllers or sensors outside the battery pack to be electrically connected to the battery management system 20 via the data acquisition harness.

[0048] The battery pack provided herein disposes the battery management module between the connector board 11 of the housing 10 and the battery modules 30. This allows the battery management module to utilize the gap between the connector board 11 and the battery modules 30, effectively utilizing the space within the housing 10. The connector board 11 has a connector, which facilitates the routing of the data acquisition harness electrically connected to the battery management module to the connector. This reduces the length of the harness and prevents it from interfering with the layout of the battery modules. This prevents part of the space within the housing 10 from being occupied by the battery management system 20 and the data acquisition harness, thereby improving the energy density of the battery pack.

[0049] In some embodiments, the battery pack includes at least two battery modules 30, and the number of battery modules 30 can be two, three, or more. Figure 2 In the example shown, there are two battery modules 30, namely battery module 30a and battery module 30b. Battery module 30a is closer to battery module 30b than to battery module 30b. Battery modules 30a and 30b are spaced apart along the length of the housing 10, which may be perpendicular to the connector board 11. Battery modules 30a and 30b are electrically connected, for example, by connecting two adjacent battery modules 30 in series via wires or connectors.

[0050] In some embodiments, the battery pack further includes at least two groups of circuit boards. For example, the battery pack includes two, three or more groups of circuit boards. Each group of circuit boards may include at least one circuit board, and the circuit board may be a flexible circuit board.

[0051] The number of circuit boards can match the number of battery modules 30. Figure 2For example, a battery pack including battery module 30a and battery module 30b includes two sets of circuit boards. Battery module 30a is closer to connector board 11 than battery module 30b. The two sets of circuit boards are respectively arranged at the bottom of battery module 30a and battery module 30b to detect status information of battery module 30a and battery module 30b. The status information can be voltage data, temperature data, or both voltage and temperature data.

[0052] The circuit boards at the bottom of battery module 30a and battery module 30b are electrically connected via connectors. The circuit board at the bottom of battery module 30a is also electrically connected to the battery management module. This allows status information from battery module 30b to be transmitted to the battery management module via the circuit board at the bottom of battery module 30a, enabling the battery management module to detect the status information of battery module 30. This arrangement effectively utilizes the space within housing 10 and prevents components collecting battery module 30 status information from interfering with the layout of the battery modules.

[0053] In some embodiments, as Figure 1 As shown, the housing 10 includes a box body 12 and a box cover 13. Figure 2 As shown, the box body 12 may include a bottom plate 121 and a first side plate 122 and a second side plate 123 arranged opposite to each other along a first direction. The first direction may be the length direction of the box body 12. The first side plate 122 may be the same component as the side plate 11. One of the first side plate 122 and the second side plate 123 is the left side plate of the box body 12, and the other is the right side plate of the box body 12. The first side plate 122 and the second side plate 123 are both arranged on the bottom plate 121. Figure 2 As shown in the example, the right side of the first side plate 122 has a first annular convex edge 1221 protruding to the right, and the left side of the second side plate 123 has a second annular convex edge 1231 protruding to the left.

[0054] The bottom plate 121 has a first long strip convex edge 1211 and a second long strip convex edge (not shown in the figure) arranged opposite to each other along the second direction. The second direction can be the width direction of the box body 12. Figure 2 As shown in the example, the front end and the rear end of the bottom plate 121 respectively have a first long strip convex edge 1211 and a second long strip convex edge protruding upward.

[0055] like Figure 1 As shown, the box cover 13 may include a top cover 131, a third side panel 132, and a fourth side panel 133. The top cover 131 is located between the third side panel 132 and the fourth side panel 133. Along the second direction, the third side panel 132 and the fourth side panel 133 are arranged opposite each other. One of the third side panel 132 and the fourth side panel 133 may be the front cover of the box cover 13, and the other may be the rear cover of the box cover 13.

[0056] The top cover plate 131 is press-fitted onto the first annular flange 1221 and the second annular flange 1231, for example, by means of threading, welding, or bonding. The top cover plate 131 and the second annular flange 1231 are also connected by means of threading, welding, or bonding. The third side plate 132 is press-fitted onto the first elongated flange 1211, for example, by means of threading, welding, or bonding. The fourth side plate 133 is press-fitted onto the second elongated flange, for example, by means of threading, welding, or bonding. This allows the cover 13 and the housing 12 to overlap, forming a accommodating cavity within the casing 10. This arrangement facilitates assembly of the cover 13 and the housing 12, and prevents the connectors from restricting the placement of the battery modules 30 during assembly.

[0057] In some embodiments, as Figure 1 As shown, the outer surface of the box cover 13 is provided with a plurality of polygonal protrusions 134. The polygonal protrusions 134 can be triangular protrusions, rectangular protrusions, pentagonal protrusions, etc. Figure 1 As shown in the example, the polygonal protrusion 134 includes a pentagonal protrusion. This arrangement improves the aesthetics of the battery pack.

[0058] In some embodiments, the battery module 30 is mounted on the bottom plate 121 of the housing 10 . For example, the battery module 30 is bonded to the bottom plate 121 so that the battery module 30 is fixed in the housing 10 .

[0059] In some embodiments, the battery module 30 is bonded to the bottom plate 121 by a thermally conductive structural adhesive. The thermally conductive structural adhesive has adhesiveness and thermal conductivity, which can fix the battery module 30 on the bottom plate 121 and enable the battery module 30 to dissipate heat in a timely manner.

[0060] In some embodiments, as Figure 3 As shown, the battery module 30 includes a first end plate 31, a second end plate 32, a cell assembly 33, and a first and second tie rod assembly. The first and second end plates 31, 32 may serve as the upper and lower plates of the battery module 30, respectively. The cell assembly 33 may include multiple single cells, which may be connected in series or in parallel.

[0061] The battery cell assembly 33 is sandwiched between the first end plate 31 and the second end plate 32, so that the first end plate 31 and the second end plate 32 protect the battery cell assembly 33. The first pull rod assembly is passed through the first end plate 31 and the second end plate 32 at one end close to the connector 11, so as to Figure 2 As shown in the example, the first pull rod assembly is installed at the left end. The second pull rod assembly is installed at the end of the first end plate 31 and the second end plate 32 away from the patch panel 11. Figure 2 As shown in the example, the second pull rod assembly is provided at the left end, so that the battery module 30 has good mechanical strength.

[0062] The present application also provides a battery system that can be used in electrical devices, including but not limited to mobile devices, electric vehicles, electric trains, ships, satellites, energy storage systems, etc. Specifically, the mobile devices may be, for example, mobile charging devices, and the electric vehicles may be, for example, pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, electric heavy trucks, or electric buses, but the embodiments of the present application are not limited thereto.

[0063] The battery system includes at least one battery pack. The specific structure and related effects of the battery pack can be referred to the relevant description of the above embodiments. Since the battery system provided in this application adopts all the technical solutions of any of the above embodiments, it has at least all the beneficial effects brought by any of the above embodiments, and will not be detailed here.

[0064] In some embodiments, the battery system includes multiple battery packs, which can be two, three, or more. The battery packs can be connected in series, in parallel, or in a combination of series and parallel, enabling the battery system to meet various power requirements.

[0065] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0066] It should be noted that phrases such as "in a specific implementation," "in some embodiments," "in this embodiment," and "exemplarily" mentioned in the specification indicate that the described embodiment may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0067] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include at least one of these features.

[0069] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0070] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0071] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature to other elements or features as depicted in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: It comprises a housing (10), a battery management system (20), and at least one battery module (30); The housing (10) has a receiving cavity therein, a connector board (11) is provided on one side of the housing (10), and a connector port is provided on the connector board (11); The battery module (30) is located in the accommodating cavity; The battery management system (20) comprises a battery management module and a collection harness, the battery management module being located between the battery module (30) and the connector board (11), the battery management module being electrically connected to the battery module (30), the collection harness being electrically connected to the battery management module, and the collection harness being led out to the connector.

2. The battery pack according to claim 1, wherein: The battery pack comprises at least two battery modules (30), each of the battery modules (30) being arranged at intervals along the length direction of the housing (10), and any two adjacent battery modules (30) being electrically connected.

3. The battery pack according to claim 2, wherein: The battery pack further comprises at least two groups of circuit boards, each group of the circuit boards being arranged at the bottom of the corresponding battery module (30), any two adjacent groups of the circuit boards being electrically connected via connectors, and the circuit board close to the connector board (11) being electrically connected to the battery management module.

4. The battery pack according to claim 1, wherein: The housing (10) comprises a box body (12) and a box cover (13), wherein the box body (12) and the box cover (13) cover each other to define the accommodating cavity.

5. The battery pack according to claim 4, characterized in that: The box body (12) comprises a bottom plate (121) and a first side plate (122) and a second side plate (123) arranged opposite to each other along a first direction; the box cover (13) comprises a top cover plate (131) and a third side plate (132) and a fourth side plate (133) arranged opposite to each other along a second direction; The bottom plate (121) has a first long strip convex edge (1211) and a second long strip convex edge arranged opposite to each other along the second direction, and the third side plate (132) and the fourth side plate (133) are respectively connected to the first long strip convex edge (1211) and the second long strip convex edge; The first side plate (122) has a first annular convex edge (1221) extending toward the second side plate (123), the second side plate (123) has a second annular convex edge extending toward the first side plate (122), and the two ends of the top cover plate (131) are respectively connected to the first long strip convex edge (1211) and the second long strip convex edge.

6. The battery pack according to claim 4, characterized in that: The outer surface of the box cover (13) is provided with a plurality of polygonal protrusions (134).

7. The battery pack according to any one of claims 1 to 6, characterized in that: The battery module (30) is mounted on the bottom plate of the housing (10).

8. The battery pack according to claim 7, characterized in that: The battery module (30) is bonded to the base plate via a heat-conducting structural adhesive.

9. The battery pack according to any one of claims 1 to 6, characterized in that: The battery module (30) comprises a first end plate (31), a second end plate (32), a battery cell assembly (33), a first pull rod assembly, and a second pull rod assembly; The battery core assembly (33) is sandwiched between the first end plate (31) and the second end plate (32); The first pull rod assembly is provided through one end of the first end plate (31) and the second end plate (32) close to the connector plate (11); The second pull rod assembly is provided through one end of the first end plate (31) and the second end plate (32) away from the connector plate (11).

10. A battery system, characterized in that: Comprising a battery pack according to any one of claims 1 to 9; The number of the battery pack is one; Alternatively, there are multiple battery packs, and the multiple battery packs are combined in series and / or in parallel.

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