A CCS assembly, a battery pack and an electric device

Abstract

This application relates to the field of battery technology, and more particularly to a CCS module, battery pack, and power supply device. The CCS module includes: a first aluminum bar and second aluminum bars. Multiple first aluminum bars are disposed on top of multiple battery modules along a first direction, connecting adjacent positive and negative terminals along the first direction, thereby allowing current to flow between battery modules along the first direction. Multiple second aluminum bars are disposed on top of multiple battery modules along a second direction, connecting the positive terminal of one battery module to the negative terminal of another battery module. Each battery module consists of two adjacent battery modules along the second direction, allowing current to flow between multiple battery modules along the second direction without the need for connecting copper busbars, thus saving material waste and reducing the production cost of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a CCS component, battery pack and power supply device. Background Technology

[0002] A battery pack may include multiple battery modules connected in series or parallel. A battery module may include multiple individual battery cells. Each individual battery cell converts chemical energy into electrical energy, thereby enabling the battery pack to provide power to electrical devices.

[0003] In related technologies, multiple aluminum bars are soldered to the top of each battery module. These aluminum bars, along with other components (such as wiring harnesses or FPC strips), form a CCS (Cell Connection System) assembly. CCS assemblies of two adjacent battery modules are connected by overlapping copper busbars to allow current flow between the multiple battery modules. Since the battery pack includes multiple battery modules, multiple CCS assemblies need to be soldered and connected to multiple overlapping copper busbars, increasing assembly time and material waste, thus increasing the production cost of the battery pack. Utility Model Content

[0004] This application provides a CCS module, a battery pack, and an electrical device, which allows multiple battery modules to be connected to only one CCS module. At the same time, aluminum bars that can connect across multiple battery modules are set between them to enable current flow between multiple battery modules, eliminating the need for overlapping copper busbars, reducing assembly time and material waste, thereby reducing the production cost of the battery pack.

[0005] In a first aspect, this application provides a CCS (Computer-Controlled System) assembly applied to a battery pack having multiple battery modules. The CCS assembly may include: a first aluminum bar and second aluminum bars. Each battery module includes multiple positive terminals and multiple negative terminals arranged along a first direction. The first direction is the length direction of the battery module. The positive and negative terminals correspond one-to-one, and there is a gap between the positive and negative terminals in a second direction. The second direction is the width direction of the battery module and is perpendicular to the first direction. Multiple first aluminum bars are disposed on top of the multiple battery modules along the first direction, and the first aluminum bars are used to connect adjacent positive and negative terminals along the first direction. Multiple second aluminum bars are disposed on top of the multiple battery modules along the second direction, and the second aluminum bars are used to connect the positive terminal of one battery module and the negative terminal of another battery module. One battery module and the other battery module are two adjacent battery modules along the second direction.

[0006] The CCS assembly provided in the first aspect includes a first aluminum bus and second aluminum bus. Multiple first aluminum bus are disposed on top of multiple battery modules along a first direction, for connecting adjacent positive and negative terminals along the first direction, thereby allowing current to flow between battery modules along the first direction. Multiple second aluminum bus are disposed on top of multiple battery modules along a second direction, for connecting the positive terminal of one battery module and the negative terminal of another battery module, wherein one battery module and the other battery module are adjacent along the second direction, thereby allowing current to flow between multiple battery modules along the second direction without the need for connecting copper busbars, thus saving material waste and reducing the production cost of the battery pack.

[0007] In one possible design, both the first and second aluminum batteries may include connection terminals. These connection terminals are used for inputting or outputting current. The connection terminals are connected to the positive terminal. Alternatively, the connection terminals are connected to the negative terminal. The two connection terminals are positioned on the same side of the battery pack along a first direction.

[0008] Based on the description of the above embodiments, both connection terminals are connected to either the positive or negative terminal, enabling the current in the battery pack to communicate with the outside world. Furthermore, the two connection terminals can be positioned on the same side of the battery pack along the first direction, which can reduce material loss and thus lower the production cost of the battery pack.

[0009] In one possible design, multiple battery modules include a first battery module, a second battery module, and a third battery module connected in series along a second direction. The positive and negative terminals of the first battery module are connected by multiple first aluminum bars. The negative terminal of the first battery module and the positive terminal of the second battery module are connected by multiple second aluminum bars. A connection terminal is connected to the negative terminal of the second battery module located at one end of the battery pack along the first direction. The negative terminal of the second battery module located at the other end of the battery pack along the first direction is connected to the positive terminal of the third battery module located at the other end of the battery pack along the first direction via a second aluminum bar. The other positive and negative terminals in the second battery module are connected by multiple first aluminum bars. A connection terminal is connected to the positive terminal of the third battery module located at one end of the battery pack along the first direction. The other positive and negative terminals in the third battery module are connected by multiple first aluminum bars.

[0010] Based on the description of the above embodiments, the multiple battery modules include a first battery module, a second battery module, and a third battery module connected in series along a second direction. This allows current to flow between the first battery module, the second battery module, the third battery module, and two connection terminals via multiple first and second aluminum bars. This eliminates the need for two overlapping copper busbars connecting the three battery modules in related technologies, saving material waste and reducing the production cost of the battery pack. Furthermore, the arrangement of the first and second aluminum bars in this embodiment allows the two connection terminals to be located on the same side of the battery pack, thereby reducing material waste and further lowering the production cost of the battery pack.

[0011] In one possible design, multiple first aluminum bars are thin aluminum sheets. One of the second aluminum bars is a multi-layered stacked aluminum foil. The negative terminal of the second battery module, located at the other end of the battery pack along the first direction, is connected to the positive terminal of the third battery module, located at the other end of the battery pack along the first direction, via the multi-layered stacked aluminum foil. The other second aluminum bars are thin aluminum sheets.

[0012] Based on the description of the above embodiments, one of the second aluminum bars is a multi-layered stacked aluminum foil. The negative terminal of the second battery module located at the other end of the battery pack along the first direction is connected to the positive terminal of the third battery module located at the other end of the battery pack along the first direction via the multi-layered stacked aluminum foil, ensuring the connection stability between the second and third battery modules, and thus ensuring the stability of current flow between the second and third battery modules. Multiple first aluminum bars and other second aluminum bars are all thin aluminum plates, ensuring the stability of current flow between multiple battery modules in the battery pack.

[0013] In one possible design, the CCS assembly may also include a thermoforming plate. The thermoforming plate is attached to the top of multiple battery modules for mounting a first aluminum bus and a second aluminum bus. The thermoforming plate has a first limiting structure and a second limiting structure. The first limiting structure defines the position of the first aluminum bus on the thermoforming plate. The second limiting structure defines the position of the second aluminum bus on the thermoforming plate.

[0014] Based on the description of the above embodiments, multiple first aluminum bars are disposed on a vacuum forming plate along a first direction, and multiple second aluminum bars are disposed on the vacuum forming plate along a second direction. The vacuum forming plate is connected to the top of multiple battery modules to enable multiple battery modules to share a single CCS assembly, reducing the number of CCS assemblies within the battery pack and lowering the production cost of the battery pack. Simultaneously, it improves the integration of the CCS assembly, thereby optimizing the space utilization within the battery pack. Furthermore, the first and second limiting structures provided on the vacuum forming plate are used to limit the positions of the first and second aluminum bars on the vacuum forming plate, respectively, so that the first and second aluminum bars can be precisely welded to the positive / negative terminals, thereby achieving stable current flow within the battery pack.

[0015] In one possible design, the first limiting structure is a first mounting groove formed in the vacuum forming panel. A first aluminum bar is placed in the first mounting groove, with the groove wall abutting against the edge of the first aluminum bar. The second limiting structure is a second mounting groove formed in the vacuum forming panel. A second aluminum bar is placed in the second mounting groove, with the groove wall abutting against the edge of the second aluminum bar.

[0016] Based on the description of the above embodiments, the first aluminum bar and the second aluminum bar are first abutted in the first mounting groove and the second mounting groove respectively to achieve positioning, and then fixed on the blister plate by hot riveting, so that the first aluminum bar and the second aluminum bar can be accurately welded to the positive / negative terminal post to achieve stable current flow in the battery pack.

[0017] In one possible design, the CCS assembly also includes multiple wiring harnesses. These harnesses are laid out on a thermoformed panel. One end of each harness is connected to a first and a second aluminum busbar. The other ends of the multiple harnesses are integrated and converged on one side of the battery pack.

[0018] Based on the description of the above embodiments, the wiring harness is laid on the vacuum forming plate, which improves the integration of the CCS components and thus optimizes the space utilization within the battery pack. Furthermore, one end of the wiring harness is connected to the first and second aluminum bars, and the other ends of multiple wiring harnesses are integrated and bundled on one side of the battery pack. This allows the wiring harness to collect signals from individual battery cells and connect to the BMS, thereby achieving intelligent management of the battery pack and extending its service life.

[0019] In one possible design, the vacuum forming plate has multiple clips. These clips are used to secure the wiring harness. The multiple clips positioned along a first direction are used to guide the wiring harness along that direction.

[0020] Based on the description of the above embodiments, the clips provided on the blister plate are used to hold the wire harness, fixing the wire harness to the blister plate so that the wire harness is integrated into the CCS assembly. Further, multiple clips are arranged along a first direction to guide the wire harness to be arranged along the first direction, so that the other ends of the multiple wire harnesses are all located on one side of the battery pack, so that the other ends of the multiple wire harnesses are integrated and bundled on one side of the battery pack.

[0021] Secondly, this application provides a battery pack including multiple battery modules and a CCS assembly as described in any of the above embodiments. The CCS assembly is soldered to the top of the multiple battery modules.

[0022] Thirdly, this application provides an electrical device including the battery pack described in the above embodiments, the battery pack being used to provide electrical energy.

[0023] The beneficial effects of the battery pack provided in the second aspect and the power supply device provided in the third aspect can be found in the first aspect and the beneficial effects of various possible embodiments of the first aspect, and will not be repeated here. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of one structure of the CCS component in an embodiment of this application.

[0026] Figure 2 for Figure 1 Isometric side view.

[0027] Figure 3 for Figure 1 A view of the explosion along the Z-direction.

[0028] Figure 4 This is a schematic diagram of a CCS component in related technologies.

[0029] Figure 5 for Figure 1 An enlarged view of section A.

[0030] Figure 6 for Figure 3 A magnified view of section B.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100-CCS components;

[0033] 1- Vacuum forming panel; 11- First mounting slot; 12- Second mounting slot;

[0034] 2-First aluminum bar; 3-Second aluminum bar; 31-Aluminum foil;

[0035] 4-Connecting end; 41-First copper busbar; 51-Second copper busbar;

[0036] 6-Wire harness; 61-Snap-on;

[0037] 7- Overlapping copper busbars;

[0038] X - First direction; Y - Second direction. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0041] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.

[0042] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0044] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used only for the convenience of describing this application and 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 application.

[0045] Furthermore, the descriptions of directions such as the X direction, Y direction, and Z direction used to explain the operation and construction of the components in this embodiment are not absolute but relative. Although these directions are appropriate when the components are in the positions shown in the figure, they should be interpreted differently when these positions change to correspond to the changes.

[0046] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0047] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0048] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] Electrical devices can be such as electric vehicles. A battery pack is the energy source for an electrical device, providing the necessary electrical power to enable it to operate normally. For example, an electric vehicle relies on the energy provided by its battery pack to drive its motor, thus propelling the vehicle.

[0050] A battery pack may include multiple battery modules connected in series or parallel. A battery module may include multiple individual battery cells. Each individual battery cell converts chemical energy into electrical energy, thereby enabling the battery pack to provide power to electrical devices.

[0051] In related technologies, multiple aluminum bars are soldered to the top of each battery module. These aluminum bars, along with other components (such as wiring harnesses or FPC strips), form a CCS (Cell Connection System) assembly. CCS assemblies of two adjacent battery modules are connected by overlapping copper busbars to allow current flow between the multiple battery modules. Since the battery pack includes multiple battery modules, multiple CCS assemblies need to be soldered and connected to multiple overlapping copper busbars, increasing assembly time and material waste, thus increasing the production cost of the battery pack.

[0052] Based on this, this application provides a CCS module, a battery pack, and an electrical device. By setting aluminum bars that can connect across multiple battery modules, current can flow between multiple battery modules, eliminating the need for overlapping copper busbars, reducing assembly time and material waste, thereby lowering the production cost of the battery pack. The following is in conjunction with... Figure 1-6 Provide a detailed description.

[0053] In a first aspect, this application provides a CCS component 100, applied to a battery pack having multiple battery modules. The CCS component 100 may include: a first aluminum bar 2 and a second aluminum bar 3. The battery module includes multiple positive terminals arranged along a first direction X and multiple negative terminals arranged along the same first direction X. The first direction X is the length direction of the battery module. The positive and negative terminals correspond one-to-one, and there is a gap between the positive and negative terminals in a second direction Y. The second direction Y is the width direction of the battery module and is perpendicular to the first direction X. Multiple first aluminum bars 2 are disposed on top of the multiple battery modules along the first direction X. The first aluminum bars 2 are used to connect adjacent positive and negative terminals along the first direction X. Multiple second aluminum bars 3 are disposed on top of the multiple battery modules along the second direction Y. The second aluminum bars 3 are used to connect the positive terminal of one battery module and the negative terminal of another battery module. One battery module and the other battery module are two adjacent battery modules along the second direction Y.

[0054] The battery module includes multiple positive electrode posts arranged along a first direction X and multiple negative electrode posts arranged along the first direction X. For example, Figure 1 As shown, the first direction X is the length direction of the battery module.

[0055] Specifically, the battery module includes multiple battery cells arranged along a first direction X, each battery cell having a positive terminal and a negative terminal. The battery cells convert chemical energy into electrical energy, which in turn generates current within the battery cell. The positive and negative terminals allow this current to flow to the outside of the battery cell.

[0056] The positive and negative terminals are paired one-to-one, and there is a gap between the positive and negative terminals in the second direction Y. For example, Figure 1 As shown, the second direction Y is the width direction of the battery module, and the second direction Y is perpendicular to the first direction X.

[0057] Specifically, in a single battery cell, the positive and negative terminals correspond one-to-one and are arranged on the top of the battery cell along the second direction Y. There is a gap between the positive and negative terminals to prevent short circuits caused by contact between them.

[0058] In addition, the two battery modules are arranged along the second direction Y. Since the two battery modules have the same specifications and the battery cells in the battery modules are arranged in the same way, the positive terminal / negative terminal of one battery module corresponds one-to-one with the negative terminal / positive terminal of the other battery module. There is a gap between the two in the second direction Y to prevent short circuits caused by contact between the positive terminal and the negative terminal.

[0059] Furthermore, a CCS assembly 100 is welded to the top of the battery module, connecting the positive and negative terminals of all battery cells through the CCS assembly 100. This connects multiple battery modules in series into a battery pack, allowing the current in all battery cells to flow together to the outside of the battery cells, providing power to the electrical device. The CCS assembly 100 is an integrated electrical connection structure that uses aluminum or copper busbars to achieve series and parallel connections between battery cells.

[0060] Specifically, such as Figure 1 As shown, the CCS component 100 may include a plurality of first aluminum bars 2 and a plurality of second aluminum bars 3.

[0061] The first aluminum bar 2 is used to connect adjacent positive and negative terminals along the first direction X. For example, when a battery module includes multiple battery cells arranged along the first direction X, the first aluminum bar 2 is welded between two adjacent battery cells. Specifically, one end of the first aluminum bar 2 is welded to the positive / negative terminal of one battery cell, and the other end of the first aluminum bar 2 is welded to the negative / positive terminal of another battery cell. In this case, current can flow between the two battery cells, so that current can flow along the first direction X within a battery module.

[0062] The second aluminum bar 3 is used to connect the positive terminal of one battery module and the negative terminal of another battery module. One battery module and the other battery module are two adjacent battery modules along the second direction Y. For example, when a battery pack includes multiple battery modules arranged along the second direction Y, adjacent battery modules include multiple sets of battery cells. Each set of battery cells consists of two corresponding battery cells along the second direction Y, and a second aluminum bar 3 can be welded between one set of battery cells. Specifically, as shown... Figure 1 As shown, in a group of battery cells, one end of the second aluminum bar 3 is welded to the positive / negative terminal of one of the battery cells, and the other end of the second aluminum bar 3 is welded to the negative / positive terminal of another battery cell, so that current can flow between multiple battery modules along the second direction Y.

[0063] As described above, compared to related technologies where current flows between multiple battery modules via connecting copper busbars 7, this application achieves current flow between multiple battery modules through the first aluminum busbar 2 and the second aluminum busbar 3 within the CCS module 100. This eliminates the need for connecting copper busbars 7, saving material waste and allowing multiple first aluminum busbars 2 and multiple second aluminum busbars 3 to be integrated into a single CCS module 100. This enables multiple battery modules to share a single CCS module 100, reducing the number of CCS modules 100 within the battery pack and lowering production costs. Simultaneously, it increases the integration level of the CCS module 100, thereby optimizing space utilization within the battery pack.

[0064] In summary, the CCS assembly 100 provided in the first aspect includes a first aluminum bus 2 and a second aluminum bus 3. Multiple first aluminum buses 2 are disposed on top of multiple battery modules along a first direction X, connecting adjacent positive and negative terminals along the first direction X, thereby allowing current to flow between battery modules along the first direction X. Multiple second aluminum buses 3 are disposed on top of multiple battery modules along a second direction Y, connecting the positive terminal of one battery module to the negative terminal of another battery module. One battery module and the other battery module are adjacent along the second direction Y, allowing current to flow between multiple battery modules along the second direction Y. This eliminates the need for connecting copper busbars 7, saving material waste and reducing the production cost of the battery pack.

[0065] Furthermore, in order to allow the current in the battery pack to communicate with the outside world, in some embodiments, such as Figure 1 and Figure 2As shown, both the first aluminum bar 2 and the second aluminum bar 3 can include a connection terminal 4, which is connected to the positive or negative terminal for inputting or outputting current. Specifically, the connection terminal 4 can be an input terminal or an output terminal. The input terminal is used to allow current to flow into the battery pack. For example, when the battery pack is charging, the connection terminal 4 is the input terminal, and current flows into the battery pack through the input terminal. The output terminal is used to allow current to flow out of the battery pack. For example, when the battery pack is discharging, the connection terminal 4 is the output terminal, and current flows out of the battery pack through the output terminal. Specifically, the CCS component in this application has two connection terminals 4, as described above... Figure 1 and Figure 2 As shown, it is positioned on the same side of the battery pack along the first direction X.

[0066] In summary, connection terminal 4 is connected to either the positive or negative terminal, allowing the current in the battery pack to communicate with the outside world.

[0067] For example, the external components in this application can be other electrical connections, which are not specifically limited here.

[0068] Furthermore, such as Figure 3 As shown, a first copper busbar 41 is connected to one of the connection ends 4. A second copper busbar 51 is connected to the other connection end 4. The first copper busbar 41 is used to extend the length of one of the connection ends 4 so that one of the connection ends 4 can be smoothly connected to the outside world. The second copper busbar 51 is used to extend the length of the other connection end 4 so that the other connection end 4 can be smoothly connected to the outside world.

[0069] like Figure 4 As shown, in the related technology, the two connection ends 4 are respectively set on both sides of the battery pack. When the electrical connector is on one side of the battery pack, one of the connection ends 4 is located on a different side from the electrical connector. It is necessary to connect a longer first copper busbar 41 or a longer second copper busbar 51 to the connection end 4 so that the connection end 4 can be smoothly connected to the electrical connector.

[0070] Based on this, the two connecting ends 4 can be arranged on the same side of the battery pack along the first direction X, so that the first copper busbar 41 and the second copper busbar 51 can extend in the same direction. Specifically, the two connecting ends 4 and the electrical connectors are located on the same side of the battery pack, which avoids the first copper busbar 41 or the second copper busbar 51 from extending from one side of the battery pack to the other side, greatly shortening the length of the first copper busbar 41 or the second copper busbar 51, reducing material loss, and thus reducing the production cost of the battery pack.

[0071] Furthermore, both the first copper busbar 41 and the second copper busbar 51 are externally wrapped with an insulating structure. Obviously, when the length of the first copper busbar 41 or the second copper busbar 51 is significantly shortened, the amount of material used for the external insulating structure of the first copper busbar 41 or the second copper busbar 51 will also be greatly reduced, further reducing material loss and thus lowering the production cost of the battery pack. The insulating structure can be a heat-shrinkable sleeve fitted onto the first copper busbar 41 and the second copper busbar 51.

[0072] As described in the above embodiments, both connection terminals 4 are connected to either the positive or negative terminal, allowing the current in the battery pack to communicate with the outside world. Furthermore, the two connection terminals 4 can be positioned on the same side of the battery pack along the first direction X, which can reduce material loss and thus lower the production cost of the battery pack.

[0073] A typical battery pack on the market usually includes three battery modules. The following explanation uses three battery modules as an example to further illustrate this solution.

[0074] In some embodiments, the plurality of battery modules include a first battery module, a second battery module, and a third battery module connected in series along a second direction Y. The positive and negative terminals of the first battery module are connected by a plurality of first aluminum bars 2. The negative terminal of the first battery module and the positive terminal of the second battery module are connected by a plurality of second aluminum bars 3. A connection terminal 4 is connected to the negative terminal of the second battery module located at one end of the battery pack along the first direction X. The negative terminal of the second battery module located at the other end of the battery pack along the first direction X is connected to the positive terminal of the third battery module located at the other end of the battery pack along the first direction X via a second aluminum bar 3. The other positive and negative terminals in the second battery module are connected by a plurality of first aluminum bars 2. A connection terminal 4 is connected to the positive terminal of the third battery module located at one end of the battery pack along the first direction X. The other positive and negative terminals in the third battery module are connected by a plurality of first aluminum bars 2.

[0075] In related technologies, such as Figure 4 As shown, when three identical battery modules are connected in series, a CCS component 100 is soldered to the top of each battery module. Each CCS component 100 is used to allow current to flow in its corresponding battery module. Furthermore, a copper busbar 7 connects two adjacent CCS components 100, thereby enabling current flow between multiple battery modules.

[0076] In this application, in order to easily distinguish the three battery modules connected in series, the battery modules in the application can be referred to as the first battery module, the second battery module, and the third battery module from top to bottom along the second direction Y.

[0077] Specifically, such as Figure 1 and Figure 2As shown, the positive and negative terminals of the first battery module are connected by multiple first aluminum bars 2. The negative terminal of the first battery module and the positive terminal of the second battery module are connected by multiple second aluminum bars 3. A connection terminal 4 is connected to the negative terminal of the second battery module located at one end of the battery pack along the first direction X.

[0078] As described above, current flows into or out of the battery cells of the first battery module through connection terminal 4, and then through the second aluminum bar 3 to allow the current to flow through the battery cells of the first battery module. The battery cells in the first battery module then flow through the first aluminum bar 2 to the battery cells in the second battery module, and then through the second aluminum bar 3 to allow the current to flow through the battery cells in the second battery module. This process constitutes one cycle until the current flows to the last battery cell of the first battery module and the last battery cell of the second battery module, ensuring that current flows through all battery cells in both the first and second battery modules, thus achieving current flow between the first and second battery modules.

[0079] In this configuration, the battery cell of the first battery module is a battery cell disposed at one end of the battery pack along the first direction X. The battery cell of the second battery module is adjacent to the battery cell of the first battery module along the first direction X.

[0080] In this configuration, the battery cells of the first second battery module are arranged along the first direction X at one end of the battery pack. The battery cells of the second second battery module are adjacent to the battery cells of the first second battery module along the first direction X.

[0081] Furthermore, such as Figure 1 and Figure 2 As shown, in the second battery module, the negative terminal located at the other end of the battery pack along the first direction X is connected to the positive terminal located at the other end of the battery pack along the first direction X in the third battery module via a second aluminum bar 3. The other positive and negative terminals in the second battery module are connected via multiple first aluminum bars 2. In the third battery module, a connection terminal 4 is connected to the positive terminal located at one end of the battery pack along the first direction X. The other positive and negative terminals in the third battery module are connected via multiple first aluminum bars 2.

[0082] As described above, the current flows through the last cell of the second battery module after the aforementioned cycle. Next, the current in the last cell of the second battery module flows through the second aluminum bar 3 into the last cell of the third battery module, and then through multiple first aluminum bars 2 in the third battery module, allowing the current to flow through the first cell of the third battery module. Finally, the current flows from the first cell of the third battery module to the connection terminal 4. This achieves the flow of current between the first battery module, the second battery module, the third battery module, and the two connection terminals 4 via multiple first aluminum bars 2 and multiple second aluminum bars 3. This eliminates the need for the two overlapping copper busbars 7 connecting the three battery modules in related technologies, saving material waste and reducing the production cost of the battery pack.

[0083] Among them, the last battery cell of the second battery module is the battery cell of the second battery module located at the other end of the battery pack along the first direction X.

[0084] Among them, the battery cell of the first third battery module is the battery cell of the third battery module disposed at one end of the battery pack along the first direction X.

[0085] Among them, the last battery cell of the third battery module is the battery cell of the third battery module located at the other end of the battery pack along the first direction X.

[0086] Furthermore, as can be seen from the above, the arrangement of the first aluminum bar 2 and the second aluminum bar 3 in this embodiment allows one of the connection ends 4 to be connected to the battery cell of the first second module, and the other connection end 4 to be connected to the battery cell of the first third battery module. Figure 1 and Figure 2 It can be seen that the two connection ends 4 are located on the same side of the battery pack in order to reduce material loss and thus reduce the production cost of the battery pack.

[0087] Specifically, in the second battery module, one of the negative terminals 4 is connected to the negative terminal at one end of the battery pack along the first direction X, and in the third battery module, another terminal 4 is connected to the positive terminal at one end of the battery pack along the first direction X.

[0088] As described in the above embodiments, the multiple battery modules include a first battery module, a second battery module, and a third battery module connected in series along the second direction Y. This allows current to flow between the first aluminum busbar 2 and the second aluminum busbar 3, and between the first battery module, the second battery module, the third battery module, and the two connecting terminals 4. This eliminates the need for the two overlapping copper busbars 7 connected between the three battery modules in related technologies, saving material waste and reducing the production cost of the battery pack. Furthermore, the arrangement of the first aluminum busbar 2 and the second aluminum busbar 3 in this embodiment allows the two connecting terminals 4 to be located on the same side of the battery pack, thereby reducing material waste and further lowering the production cost of the battery pack.

[0089] Furthermore, in some embodiments, the multiple first aluminum bars 2 are all thin aluminum plates. One of the second aluminum bars 3 is a multi-layered stacked aluminum foil 31. The negative terminal of the second battery module located at the other end of the battery pack along the first direction X is connected to the positive terminal of the third battery module located at the other end of the battery pack along the first direction X through the multi-layered stacked aluminum foil 31. The other second aluminum bars 3 are all thin aluminum plates.

[0090] Aluminum has excellent electrical conductivity. Furthermore, the thin sheet offers advantages such as light weight, less material usage, and a larger contact area with the electrode post, ensuring welding stability and thus guaranteeing stable current flow between battery cells.

[0091] Therefore, multiple first aluminum bars 2 and multiple second aluminum bars 3 can all be made of thin aluminum plates to ensure the stability of current flow between multiple battery modules in the battery pack.

[0092] Furthermore, the negative terminal of the second battery module is adjacent to the positive terminal of the third battery module, and the second battery module and the third battery module are connected only through one negative terminal and one positive terminal. Using a thin aluminum plate between the negative terminal and the positive terminal will affect the connection stability between the second battery module and the third battery module.

[0093] Based on this, such as Figure 5 As shown, the negative terminal of the second battery module located at the other end of the battery pack along the first direction X is connected to the positive terminal of the third battery module located at the other end of the battery pack along the first direction X through a multi-layered stacked aluminum foil 31. Specifically, the aluminum foil 31 has low hardness, the multi-layered stacked aluminum foil 31 has a certain structural strength, and the multi-layered stacked aluminum foil 31 is relatively soft, so it is not easy to suffer structural damage when subjected to vibration or impact, thereby ensuring the connection stability between the second battery module and the third battery module, and thus ensuring the stability of current flow between the second battery module and the third battery module.

[0094] According to the description of the above embodiments, one of the second aluminum bars 3 is a multi-layered stacked aluminum foil 31. The negative terminal of the second battery module located at the other end of the battery pack along the first direction X is connected to the positive terminal of the third battery module located at the other end of the battery pack along the first direction X through the multi-layered stacked aluminum foil 31, ensuring the connection stability between the second and third battery modules, and thus ensuring the stability of current flow between the second and third battery modules. The multiple first aluminum bars 2 and other second aluminum bars 3 are all thin aluminum plates, ensuring the stability of current flow between the multiple battery modules in the battery pack.

[0095] Furthermore, to ensure that the first aluminum bar 2 and the second aluminum bar 3 can be accurately welded to the positive / negative terminals, thereby achieving stable current flow, this application also includes the following design:

[0096] In some embodiments, the CCS assembly 100 may further include a thermoforming plate 1. The thermoforming plate 1 is connected to the top of a plurality of battery modules for mounting a first aluminum bar 2 and a second aluminum bar 3. The thermoforming plate 1 is provided with a first limiting structure and a second limiting structure. The first limiting structure is used to limit the position of the first aluminum bar 2 on the thermoforming plate 1. The second limiting structure is used to limit the position of the second aluminum bar 3 on the thermoforming plate 1.

[0097] Among them, such as Figure 1 As shown, multiple first aluminum bars 2 can be arranged on the blister plate 1 along the first direction X, so that the first aluminum bars 2 are used to connect two adjacent positive or negative terminals along the first direction X. Similarly, as Figure 1 As shown, multiple second aluminum bars 3 can be disposed on the thermoforming plate 1 along the second direction Y, so that the second aluminum bars 3 are used to connect the positive terminal of one battery module and the negative terminal of another battery module. Furthermore, the thermoforming plate 1 is connected to the top of multiple battery modules in the battery pack, so that all the first aluminum bars 2 and all the second aluminum bars 3 can be welded to the positive / negative terminals in the battery modules, thereby enabling multiple battery modules to share a single CCS assembly 100.

[0098] Specifically, the first aluminum bar 2 and the second aluminum bar 3 can be fixed to the thermoforming plate 1 by hot riveting.

[0099] Furthermore, the first limiting structure is used to limit the position of the first aluminum bar 2 on the blister plate 1, so that the first aluminum bar 2 is pre-positioned and then fixed to the blister plate 1 by the hot riveting post, which ensures the accuracy of the fixed position of the first aluminum bar 2, so that the first aluminum bar 2 can be accurately welded to the positive / negative pole, thereby realizing the stable flow of current.

[0100] The second limiting structure is used to limit the position of the second aluminum bar 3 on the blister plate 1, so that the second aluminum bar 3 is pre-positioned and then fixed to the blister plate 1 by the hot riveting post, which ensures the accuracy of the fixed position of the second aluminum bar 3, and enables the second aluminum bar 3 to be accurately welded to the positive / negative pole, thereby realizing the stable flow of current.

[0101] According to the description of the above embodiments, multiple first aluminum bars 2 are disposed on the thermoforming plate 1 along the first direction X, and multiple second aluminum bars 3 are disposed on the thermoforming plate 1 along the second direction Y. The thermoforming plate 1 is connected to the top of multiple battery modules to enable multiple battery modules to share a single CCS assembly 100, reducing the number of CCS assemblies 100 in the battery pack and lowering the production cost of the battery pack. At the same time, it improves the integration of the CCS assembly 100, thereby optimizing the space utilization within the battery pack. Furthermore, the first limiting structure and the second limiting structure provided on the thermoforming plate 1 are used to limit the positions of the first aluminum bars 2 and the second aluminum bars 3 on the thermoforming plate 1, respectively, so that the first aluminum bars 2 and the second aluminum bars 3 can be accurately welded to the positive / negative terminals, thereby achieving stable current flow in the battery pack.

[0102] Specifically, this application can also be combined with Figure 6 The first and second limiting structures will be further explained.

[0103] In some embodiments, such as Figure 6 As shown, the first limiting structure is a first mounting groove 11 formed on the vacuum forming plate 1. A first aluminum bar 2 is placed in the first mounting groove 11, with the groove wall of the first mounting groove 11 abutting against the edge of the first aluminum bar 2. The second limiting structure is a second mounting groove 12 formed on the vacuum forming plate 1. A second aluminum bar 3 is placed in the second mounting groove 12, with the groove wall of the second mounting groove 12 abutting against the edge of the second aluminum bar 3.

[0104] The first limiting structure is a first mounting groove 11 formed on the vacuum forming plate 1. The first aluminum bar 2 is placed in the first mounting groove 11, and the groove wall of the first mounting groove 11 abuts against the edge of the first aluminum bar 2 to prevent the first aluminum bar 2 from falling out of the first mounting groove 11. The first aluminum bar 2 first abuts against the first mounting groove 11 to achieve limiting, and then is fixed to the vacuum forming plate 1 by a hot riveting post, so that the first aluminum bar 2 can be accurately welded to the positive / negative terminal post to achieve stable current flow in the battery pack.

[0105] Specifically, the shape of the first mounting groove 11 is basically the same as the shape of the first aluminum bar 2, and the size of the first mounting groove 11 is slightly larger than the size of the first aluminum bar 2, so that the first aluminum bar 2 can be smoothly placed in the first mounting groove 11.

[0106] The second limiting structure is a second mounting groove 12 formed on the vacuum forming plate 1. The second aluminum bar 3 is placed in the second mounting groove 12, and the groove wall of the second mounting groove 12 abuts against the edge of the second aluminum bar 3 to prevent the second aluminum bar 3 from falling out of the second mounting groove 12. The second aluminum bar 3 first abuts against the second mounting groove 12 to achieve limiting, and then is fixed to the vacuum forming plate 1 by a hot riveting post, so that the second aluminum bar 3 can be accurately welded to the positive / negative terminal post to achieve stable current flow in the battery pack.

[0107] Specifically, the shape of the second mounting groove 12 is basically the same as that of the second aluminum bar 3, and the size of the second mounting groove 12 is slightly larger than that of the second aluminum bar 3, so that the second aluminum bar 3 can be smoothly placed in the second mounting groove 12.

[0108] According to the description of the above embodiments, the first aluminum bar 2 and the second aluminum bar 3 are first abutted in the first mounting groove 11 and the second mounting groove 12 respectively to achieve positioning, and then fixed on the blister plate 1 by hot riveting, so that the first aluminum bar 2 and the second aluminum bar 3 can be accurately welded to the positive / negative terminal post to achieve stable current flow in the battery pack.

[0109] Furthermore, the CCS component 100 can also be used to acquire signals, such as voltage and temperature.

[0110] Specifically, such as Figure 2 and Figure 3 As shown, in some embodiments, the CCS assembly 100 further includes a plurality of wiring harnesses 6. The wiring harnesses 6 are arranged on the thermoforming plate 1. One end of the wiring harnesses 6 is connected to the first aluminum bar 2 and the second aluminum bar 3. The other ends of the plurality of wiring harnesses 6 are integrated and converged on one side of the battery pack.

[0111] Wiring harness 6 can be used to collect voltage or temperature signals from the battery module and transmit these signals to the BMS (Battery Management System) for processing. The BMS receives these signals and monitors the status of each battery module in the battery pack based on them, thereby intelligently managing and maintaining each battery module to prevent overcharging and over-discharging, thus extending the battery pack's lifespan.

[0112] One end of the wiring harness 6 is connected to the first aluminum bar 2 and the second aluminum bar 3, so that the wiring harness 6 can collect signals from the battery cells through the first aluminum bar 2 and the second aluminum bar 3.

[0113] The other ends of multiple wire harnesses 6 are integrated and bundled on one side of the battery pack, so that the multiple wire harnesses 6 are bundled together and connected to the BMS in a unified manner. This facilitates the BMS to receive and process the signals transmitted by the multiple wire harnesses 6, thereby realizing intelligent management of the battery pack and extending the service life of the battery pack.

[0114] The wiring harness 6 is laid on the vacuum forming plate 1, so that the CCS assembly 100 includes the wiring harness 6 laid on the vacuum forming plate 1 before installation, which improves the integration of the CCS assembly 100 and thus optimizes the space utilization within the battery pack.

[0115] As described in the above embodiment, the wiring harness 6 is laid on the thermoforming plate 1, which improves the integration of the CCS assembly 100 and thus optimizes the space utilization within the battery pack. Furthermore, one end of the wiring harness 6 is connected to the first aluminum bus 2 and the second aluminum bus 3, and the other ends of multiple wiring harnesses 6 are integrated and bundled on one side of the battery pack. This allows the wiring harness 6 to collect signals from individual battery cells and connect to the BMS, thereby achieving intelligent management of the battery pack and extending its service life.

[0116] Furthermore, such as Figure 3 As shown, in some embodiments, the thermoforming plate 1 is provided with a plurality of clips 61. The clips 61 are used to hold the wiring harness 6. The plurality of clips 61 arranged along the first direction X are used to guide the wiring harness 6 to be arranged along the first direction X.

[0117] According to the description of the above embodiment, the buckles 61 provided on the blister plate 1 are used to hold the wiring harness 6, so that the wiring harness 6 is fixed on the blister plate 1 and integrated into the CCS assembly 100. Further, multiple buckles 61 are arranged along a first direction X to guide the wiring harness 6 to be arranged along the first direction X, so that the other ends of the multiple wiring harnesses 6 are all located on one side of the battery pack, so that the other ends of the multiple wiring harnesses 6 are integrated and bundled on one side of the battery pack.

[0118] Secondly, this application provides a battery pack including multiple battery modules and a CCS assembly as described in any of the above embodiments. The CCS assembly is soldered to the top of the multiple battery modules.

[0119] Thirdly, this application provides an electrical device including the battery pack described in the above embodiments, the battery pack being used to provide electrical energy.

[0120] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0121] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A CCS component, applied to a battery pack having multiple battery modules, characterized in that, include: First aluminum bar and second aluminum bar; The battery module includes multiple positive terminals arranged along a first direction and multiple negative terminals arranged along a first direction. Wherein, the first direction is the length direction of the battery module; The positive terminal and the negative terminal are in one-to-one correspondence, and there is a gap between the positive terminal and the negative terminal in the second direction; Wherein, the second direction is the width direction of the battery module, and the second direction is perpendicular to the first direction; Multiple first aluminum bars are disposed on top of the multiple battery modules along a first direction, and the first aluminum bars are used to connect the positive electrode post and the negative electrode post adjacent along the first direction; Multiple second aluminum bars are disposed on top of the multiple battery modules along a second direction, and the second aluminum bars are used to connect the positive terminal of one of the battery modules and the negative terminal of another battery module; One of the battery modules and the other battery module are two adjacent battery modules along the second direction.

2. The CCS component according to claim 1, characterized in that, Both the first aluminum bar and the second aluminum bar include a connecting end; The connection terminal is used for inputting or outputting current; The connection terminal is connected to the positive terminal; Alternatively, the connection terminal is connected to the negative terminal; The two connection ends are disposed on the same side of the battery pack along the first direction.

3. The CCS component according to claim 2, characterized in that, The plurality of battery modules include a first battery module, a second battery module, and a third battery module connected in series along the second direction; The positive and negative terminals of the first battery module are connected by multiple first aluminum bars; The negative terminal of the first battery module and the positive terminal of the second battery module are connected by a plurality of second aluminum bars; The connection terminal is connected to the negative terminal post located at one end of the battery pack along the first direction in the second battery module; The negative terminal of the second battery module located at the other end of the battery pack along the first direction is connected to the positive terminal of the third battery module located at the other end of the battery pack along the first direction through a second aluminum bar. The other positive and negative terminals in the second battery module are connected via multiple first aluminum bars; The connection terminal is connected to the positive terminal post located at one end of the battery pack along the first direction in the third battery module. The other positive and negative terminals in the third battery module are connected through multiple first aluminum bars.

4. The CCS component according to claim 3, characterized in that, Multiple first aluminum bars are thin sheets of aluminum; One of the second aluminum foils is a multi-layered aluminum foil; The negative terminal of the second battery module located at the other end of the battery pack along the first direction is connected to the positive terminal of the third battery module located at the other end of the battery pack along the first direction through the multi-layered aluminum foil. The other second aluminum bars are all thin sheets of aluminum.

5. The CCS component according to any one of claims 1-4, characterized in that, This also includes vacuum forming boards; The vacuum forming plate is connected to the top of the plurality of battery modules and is used to install the first aluminum bar and the second aluminum bar; The vacuum forming plate is provided with a first limiting structure and a second limiting structure; The first limiting structure is used to limit the position of the first aluminum bar on the thermoforming plate; The second limiting structure is used to limit the position of the second aluminum bar on the thermoforming plate.

6. The CCS component according to claim 5, characterized in that, The first limiting structure is a first mounting groove formed on the vacuum forming plate; The first aluminum bar is placed in the first mounting groove, and the groove wall of the first mounting groove abuts against the edge of the first aluminum bar. The second limiting structure is a second mounting groove formed on the vacuum forming plate; The second aluminum bar is placed in the second mounting groove, and the groove wall of the second mounting groove abuts against the edge of the second aluminum bar.

7. The CCS component according to claim 5, characterized in that, It also includes multiple wire harnesses; The wire harness is laid on the vacuum forming plate; One end of the wire harness is connected to the first aluminum bar and the second aluminum bar; The other ends of the multiple wire harnesses are integrated and converged on one side of the battery pack.

8. The CCS component according to claim 7, characterized in that, The vacuum forming plate is provided with multiple buckles; The buckle is used to secure the wire harness; Multiple clips arranged along the first direction are used to guide the wire harness to be arranged along the first direction.

9. A battery pack, characterized in that, Includes multiple battery modules and the CCS component according to any one of claims 1-8; The CCS component is welded to the top of the multiple battery modules.

10. An electrical device, characterized in that, Includes the battery pack of claim 9, the battery pack being used to provide electrical energy.

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