Battery pack

Abstract

The utility model provides a battery pack, which comprises: a battery cell group module, which comprises a frame and at least one battery cell stacking body, an accommodating space is formed in the frame, the battery cell stacking body is arranged in the accommodating space, and each battery cell stacking body comprises a plurality of stacked soft package battery cells; the heat exchange assembly is arranged on at least one side of the battery cell group module in the first direction; the first direction is the height direction of the cell stack; and the heat conductor is at least arranged between the frame and the tab side of the battery cell stacking body, and the heat conductor is respectively connected with the tab of the soft package battery cell and the heat exchange assembly in a heat conduction manner. According to the battery pack provided by the invention, the heat conductor is arranged between the frame of the battery cell group module and the tabs of the soft package battery cells, and the heat conductor can directly transfer heat between the tabs and the heat exchange assembly in a contact heat exchange manner, so that the heat resistance between the tabs and the heat exchange assembly can be effectively reduced, and the heat exchange efficiency of the battery pack can be improved.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and more particularly to a battery pack. Background Technology

[0002] The battery pack includes a housing and multiple battery modules disposed within the housing. Each battery module includes multiple stacked pouch cells. In order to keep the pouch cells within a preset temperature range, the temperature of the battery module needs to be regulated by a heat exchange component.

[0003] However, in the battery pack, the thermal resistance between the pouch cells and the heat exchange components is relatively large, resulting in a low heat exchange efficiency of the battery pack. Utility Model Content

[0004] In view of this, the purpose of this application is to propose a battery pack that at least partially solves the problem of low heat exchange efficiency of battery packs.

[0005] Based on the above objectives, a first aspect of this application provides a battery pack, comprising: a cell assembly module, including a frame and at least one cell stack, wherein a receiving space is formed within the frame, the cell stack is disposed within the receiving space, and each cell stack includes a plurality of stacked pouch cells; a heat exchange component, disposed on at least one side of the cell assembly module along a first direction, the first direction being the height direction of the cell stack; and a heat conductor, at least disposed between the frame and the tab side of the cell stack, the heat conductor being thermally connected to the tab of the pouch cell and the heat exchange component respectively.

[0006] Optionally, the heat conductor at least fills the gap between the tab and the adjacent portion of the frame.

[0007] Optionally, the heat exchange assembly includes a liquid cooling plate, a liquid inlet connector, and a liquid outlet connector, wherein the liquid inlet connector and the liquid outlet connector are respectively connected to the liquid cooling plate; the frame has a top opening at the top and a bottom opening at the bottom; the liquid cooling plate is disposed in the top opening and / or the bottom opening.

[0008] Optionally, the liquid cooling plate includes a first liquid cooling plate and a second liquid cooling plate respectively disposed on opposite sides of the cell assembly module along the first direction; the liquid inlet connector includes a liquid inlet tee connector, which is connected to the first liquid cooling plate and the second liquid cooling plate respectively; and / or, the liquid outlet connector includes a liquid outlet tee connector, which is connected to the first liquid cooling plate and the second liquid cooling plate respectively.

[0009] Optionally, along the circumferential edge of the liquid cooling plate, the liquid inlet connector and the liquid outlet connector are both close to the same side edge of the liquid cooling plate, or respectively close to different side edges of the liquid cooling plate.

[0010] Optionally, multiple pouch cells in the same cell stack are stacked along a second direction, which intersects with the first direction; the frame includes two side plates and multiple connecting beams, the two side plates are respectively disposed on both sides of the cell stack along the second direction, and the two side plates are connected and clamped to fix the cell stack through the connecting beams.

[0011] Optionally, the heat conductor at least fills the gap between the tab and the adjacent connecting beam, and the heat conductor extends along the first direction and is directly connected to the heat exchange assembly.

[0012] Optionally, the battery pack further includes a battery management system, which includes multiple slave control boards. Each side panel is equipped with a slave control board, and the slave control board is electrically connected to the corresponding cell stack.

[0013] Optionally, the thermal conductor may include thermally conductive potting compound or thermally conductive structural adhesive.

[0014] Optionally, the battery pack further includes a housing, to which the cell assembly module is connected.

[0015] Optionally, the housing includes a plate-shaped lower housing, and the frame is connected to the lower housing by fasteners.

[0016] Optionally, the heat exchange component is configured as the housing of the battery pack, and the cell assembly module is connected to the heat exchange component.

[0017] As can be seen from the above, the battery pack provided in this application has a heat conductor placed between the cell assembly module frame and the tabs of the pouch cells. The heat conductor can directly transfer heat between the tabs and the heat exchange components through contact heat exchange, which can effectively reduce the thermal resistance between the tabs and the heat exchange components and help improve the heat exchange efficiency of the tabs. When the heat exchange efficiency of the tabs increases, it helps to improve the overall heat exchange efficiency of the battery pack on the one hand, and on the other hand, it also helps to reduce the temperature difference between the tabs and other areas in the pouch cells, thereby improving the temperature uniformity of the pouch cells. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a partial cross-sectional view of a battery pack with a first structure according to an embodiment of this application;

[0020] Figure 2 This is a partial top view schematic diagram of a battery pack with a second structure according to an embodiment of this application;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross section AA;

[0022] Figure 4 This is a partial exploded view of a battery pack with a second structure according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the heat exchange component in a battery pack with a second structure according to an embodiment of this application;

[0024] Figure 6 This is a partial top view schematic diagram of a battery pack with a third structure according to an embodiment of this application;

[0025] Figure 7 This is a partial top view schematic diagram of the battery pack with the fourth structure according to an embodiment of this application;

[0026] Figure 8 This is a top view of the battery pack with the liquid cooling plate removed, representing a second structure according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1000, Cell assembly module; 100, Cell stack; 110, Soft-pack cell; 111, Tab; 200, Frame; 210, Top opening; 220, Bottom opening; 230, Side plate; 240, Connecting beam; 250, Accommodation space; 300, Heat conductor;

[0029] 2000, outer casing; 2100, lower casing;

[0030] 3000, Heat exchanger assembly; 3100, Liquid cooling plate; 3110, Flow channel; 3111, Liquid inlet end; 3112, Liquid outlet end; 3120, First edge; 3130, Second edge; 3140, Third edge; 3150, First liquid cooling plate; 3160, Second liquid cooling plate; 3200, Liquid inlet connector; 3210, Liquid inlet tee connector; 3300, Liquid outlet connector; 3310, Liquid outlet tee connector;

[0031] 4000, top cover; 5000, U-shaped shell. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0033] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components described in these embodiments do not limit the scope of this application.

[0034] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0035] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0036] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] Figure 1 A partial schematic diagram of the battery pack with the first structure is shown.

[0038] like Figure 1 The battery pack includes a housing 2000 and a battery module placed inside the housing 2000. The battery module includes a U-shaped shell 5000, a top cover 4000 covering the top opening of the U-shaped shell 5000, and a pouch cell 110 disposed inside the U-shaped shell 5000. The pouch cell 110 includes tabs 111 extending from the sidewall, which are used for electrical connection with a battery pack, busbar, or external circuit.

[0039] like Figure 1 In some embodiments, the battery pack includes a heat exchange assembly 3000, which may be disposed above the top cover 4000. The applicant's research found that during charge-discharge cycles of the pouch cell 110, the temperature at its tab 111 is relatively high. As mentioned above, the tab 111 is located on the side of the pouch cell 110, and is far from both the top cover 4000 and the heat exchange assembly 3000, resulting in a large thermal resistance between the tab 111 and the heat exchange assembly 3000, thus causing low heat exchange efficiency of the battery pack.

[0040] To address the aforementioned issues, this application provides a battery pack.

[0041] Figure 2 A partial top view of the second type of battery pack is shown. Figure 3 Showing Figure 2 A schematic diagram of the cross-section AA in the middle.

[0042] like Figure 2 and Figure 3 The battery pack includes: a cell assembly module 1000, comprising a frame 200 and at least one cell stack 100, wherein a receiving space 250 is formed within the frame 200, and the cell stack 100 is disposed within the receiving space 250, each cell stack 100 comprising a plurality of stacked pouch cells 110; and a heat exchange assembly 3000, along a first direction (e.g., ...). Figure 3 The Z direction is disposed on at least one side of the cell assembly module 1000; the first direction is the height direction of the cell stack 100; the heat conductor 300 is disposed at least between the frame 200 and the tab side of the cell stack 100, and the heat conductor 300 is thermally connected to the tab 111 of the soft-pack cell 110 and the heat exchange assembly 3000 respectively.

[0043] For example, the heat conductor 300 is a structural component formed by machining or by fluid solidification.

[0044] For example, the heat exchange component 3000 can be a water-cooled plate, a heating film, or a heat sink.

[0045] For example, the thermal conductivity of the heat conductor 300 is better than that of air.

[0046] For example, the heat conductor 300 can be connected to the frame 200 or spaced apart from the frame 200.

[0047] by Figure 3 Taking the structure and orientation shown as an example, the left and right sides of the cell stack 100 are the tab sides of the cell stack 100.

[0048] In this embodiment, a heat conductor 300 is disposed between the frame 200 and the tab 111 of the pouch cell 110, and the heat conductor 300 is thermally connected to both the tab 111 and the heat exchange assembly 3000. The heat conductor 300 can directly transfer the heat from the tab 111 of the pouch cell 110 to the heat exchange assembly 3000 through contact heat exchange, thus achieving high heat exchange efficiency and helping to reduce the thermal resistance between the tab 111 of the pouch cell 110 and the heat exchange assembly 3000.

[0049] In the battery pack provided in this embodiment, a heat conductor 300 is provided between the frame 200 of the cell assembly module 1000 and the tab 111 of the pouch cell 110. The heat conductor 300 can directly transfer heat between the tab 111 and the heat exchange assembly 3000 through contact heat exchange, which can effectively reduce the thermal resistance between the tab 111 and the heat exchange assembly 3000 and help improve the heat exchange efficiency of the tab 111. When the heat exchange efficiency of the tab 111 increases, it helps to improve the overall heat exchange efficiency of the battery pack on the one hand, and on the other hand, it also helps to reduce the temperature difference between the tab 111 and other areas in the pouch cell 110, thereby improving the temperature uniformity of the pouch cell 110.

[0050] like Figure 3 In some embodiments, the heat conductor 300 at least fills the gap between the tab 111 and the adjacent section frame 200.

[0051] For example, in the same cell stack 100, along the stacking direction of the pouch cells 110, the tabs 111 of two adjacent pouch cells 110 are overlapped to make the two adjacent pouch cells 110 electrically connected.

[0052] For example, a busbar can also be provided on the tab side of the cell stack 100, and the tabs 111 of multiple pouch cells 110 are electrically connected to the busbar so that multiple pouch cells 110 in the cell stack 100 are electrically connected.

[0053] When the heat conductor 300 fills the gap between the tab 111 and the adjacent frame 200, all the tabs 111 can fully contact the heat conductor 300 (when the tab 111 is connected to a busbar, the heat conductor 300 is also thermally connected to the busbar). The heat conductor 300 and the heat exchange component 3000 can also have a large contact heat exchange area, thereby further reducing the thermal resistance between the tab 111 and the heat exchange component 3000 and improving the overall heat exchange efficiency of the battery pack.

[0054] Figure 4 A partial exploded view of the second type of battery pack is shown.

[0055] like Figure 4 In some embodiments, the heat exchange assembly 3000 includes a liquid cooling plate 3100, a liquid inlet connector 3200, and a liquid outlet connector 3300, which are respectively connected to the liquid cooling plate 3100; the frame 200 has a top opening 210 at the top and a bottom opening 220 at the bottom; the top opening 210 and / or the bottom opening 220 are provided with the liquid cooling plate 3100.

[0056] For example, the frame 200 can be disposed in the circumferential direction of the cell stack 100 to ensure that the multiple pouch cells 110 in the cell stack 100 can remain stacked.

[0057] For example, when the liquid cooling plate 3100 is disposed in the top opening 210, the orthographic projection of the liquid cooling plate 3100 on the top of the frame 200 can at least cover a portion of the top opening 210. Similarly, when the liquid cooling plate 3100 is disposed in the bottom opening 220, the orthographic projection of the liquid cooling plate 3100 on the bottom of the frame 200 can at least cover a portion of the bottom opening 220.

[0058] Taking heat dissipation through heat exchange component 3000 as an example, coolant with a lower ambient temperature enters the liquid cooling plate 3100 through inlet connector 3200. During its flow within the liquid cooling plate 3100, the coolant absorbs heat generated by the battery cell stack 100, resulting in an increase in its own temperature. The heated coolant is then discharged from the liquid cooling plate 3100 through outlet connector 3300.

[0059] In the cell assembly module 1000, the top of all the pouch cells 110 is close to the top opening 210, and the bottom of all the pouch cells 110 is close to the bottom opening 220. When the liquid cooling plate 3100 is located at the top opening 210 or the bottom opening 220, it can cover all the pouch cells 110 within the frame 200. That is, the liquid cooling plate 3100 can provide heat exchange for all the pouch cells 110, which helps to improve the utilization rate of the liquid cooling plate 3100 and the heat exchange effect of the battery pack.

[0060] Of course, in order to further improve the heat exchange efficiency of the battery pack, liquid cooling plates 3100 can be provided in both the top opening 210 and the bottom opening 220, so that the top and bottom of the battery cell stack 100 can be heat exchanged simultaneously through the liquid cooling plates 3100 located above and below the battery cell module 1000, which also helps to make the temperature of the soft-pack battery cell 110 more uniform.

[0061] It should be noted that when two or more liquid cooling plates 3100 are set in the battery pack, the structures of the different liquid cooling plates 3100 can be the same or different.

[0062] Meanwhile, different liquid cooling plates 3100 can share the same liquid inlet connector 3200, that is, the same liquid inlet connector 3200 can be connected to different liquid cooling plates 3100 respectively; or, different liquid cooling plates 3100 can also be connected to the liquid inlet connector 3200 separately, that is, the liquid inlet connector 3200 and the liquid cooling plate 3100 are connected in a one-to-one correspondence.

[0063] The liquid outlet connector 3300 can be configured in the same way as the liquid inlet connector 3200 described above, and will not be repeated here.

[0064] Figure 5 A schematic diagram of the heat exchange component 3000 in the battery pack of the second structure is shown.

[0065] like Figure 4 and Figure 5 In some embodiments, the liquid cooling plate 3100 includes a first liquid cooling plate 3150 and a second liquid cooling plate 3160 respectively disposed on opposite sides of the cell assembly module 1000 along a first direction; the liquid inlet connector 3200 includes a liquid inlet tee connector 3210, which is connected to the first liquid cooling plate 3150 and the second liquid cooling plate 3160 respectively.

[0066] For example, a first liquid cooling plate 3150 is disposed in one of the top opening 210 and the bottom opening 220 of the frame 200, and a second liquid cooling plate 3160 is disposed in the other.

[0067] For example, when the flow channel 3110 structure of the first liquid cooling plate 3150 and the second liquid cooling plate 3160 is the same, the liquid inlet tee connector 3210 can be a T-type connector, with two oppositely arranged interfaces connecting to the first liquid cooling plate 3150 and the second liquid cooling plate 3160 respectively, and the other interface used to connect to the external liquid inlet pipeline.

[0068] The same liquid inlet tee connector 3210 allows heat exchange medium to be injected into the first liquid cooling plate 3150 and the second liquid cooling plate 3160 respectively, which can effectively simplify the structure of the liquid inlet pipeline, help reduce the assembly and maintenance difficulty of the battery pack, and facilitate its use.

[0069] like Figure 4 and Figure 5 In some embodiments, the liquid outlet connector 3300 includes a liquid outlet tee connector 3310, which is connected to the first liquid cooling plate 3150 and the second liquid cooling plate 3160 respectively.

[0070] For example, the liquid outlet tee connector 3310 can also be a T-type connector, with two oppositely arranged interfaces connected to the first liquid cooling plate 3150 and the second liquid cooling plate 3160 respectively, and the other interface used to connect to an external liquid outlet pipeline.

[0071] The beneficial effects of connecting the liquid outlet tee connector 3310 to the first liquid cooling plate 3150 and the second liquid cooling plate 3160 are the same as those of connecting the liquid inlet tee connector 3210 to the first liquid cooling plate 3150 and the second liquid cooling plate 3160, and will not be repeated here.

[0072] like Figure 2 and Figure 5 In some embodiments, along the circumferential edge of the liquid cooling plate 3100, the inlet connector 3200 and the outlet connector 3300 are located near the same side edge of the liquid cooling plate 3100.

[0073] Specifically, such as Figure 2 The liquid cooling plate 3100 is provided with a flow channel 3110, which includes a liquid inlet end 3111 and a liquid outlet end 3112. The liquid inlet connector 3200 is connected to the liquid inlet end 3111, and the liquid outlet connector 3300 is connected to the liquid outlet end 3112. Both the liquid inlet end 3111 and the liquid outlet end 3112 are close to the first edge 3120 of the liquid cooling plate 3100.

[0074] For example, multiple flow channels 3110 can be provided inside the liquid cooling plate 3100, and the multiple flow channels 3110 can be arranged in parallel.

[0075] For example, in this embodiment, the flow channel 3110 can be a U-shaped flow channel or a serpentine flow channel.

[0076] The liquid inlet end 3111 and the liquid outlet end 3112 are close to the same edge of the liquid cooling plate 3100. That is, the liquid inlet connector 3200 and the liquid outlet connector 3300 are both located on the same side of the battery pack, which facilitates the disassembly and maintenance of the liquid inlet pipe (an external pipe connected to the liquid inlet connector 3200 for inputting the heat exchange medium into the liquid cooling plate 3100) and the liquid outlet pipe (an external pipe connected to the liquid outlet connector 3300 for discharging the heat exchange medium in the liquid cooling plate 3100).

[0077] Meanwhile, the flow channel 3110 in this embodiment has a relatively long stroke, which allows the heat exchange medium in the flow channel 3110 to have more sufficient heat exchange with the heat conductor 300 and the soft-pack battery 110, which helps to reduce heat exchange energy consumption and save on usage costs.

[0078] In some embodiments, along the circumferential edge of the liquid cooling plate 3100, the liquid inlet connector 3200 and the liquid outlet connector 3300 are respectively located near different side edges of the liquid cooling plate 3100.

[0079] Specifically, Figure 6 A partial top view of the third type of battery pack is shown.

[0080] like Figure 6 The liquid inlet end 3111 is close to the first edge 3120 of the liquid cooling plate 3100, and the liquid outlet end 3112 is close to the second edge 3130 of the liquid cooling plate 3100. The first edge 3120 and the second edge 3130 are arranged adjacent to each other.

[0081] For example, in this embodiment, the flow channel 3110 can be an L-shaped flow channel or an arc-shaped flow channel.

[0082] The liquid inlet end 3111 and the liquid outlet end 3112 are respectively close to the adjacent two sides of the liquid cooling plate 3100. That is, the liquid inlet connector 3200 and the liquid outlet connector 3300 are respectively located on the adjacent two sides of the battery pack, which facilitates the setting of the liquid inlet pipe and the liquid outlet pipe and effectively prevents interference between the liquid inlet pipe and the liquid outlet pipe.

[0083] Meanwhile, the trajectory design of the flow channel 3110 in this embodiment can be more flexible, providing a structural basis for better control of the flow rate of the heat exchange medium in the flow channel 3110.

[0084] also, Figure 7 A partial top view of the fourth type of battery pack is shown.

[0085] like Figure 7 The liquid inlet end 3111 is close to the first edge 3120 of the liquid cooling plate 3100, and the liquid outlet end 3112 is close to the third edge 3140 of the liquid cooling plate 3100. The first edge 3120 and the third edge 3140 are arranged opposite to each other.

[0086] For example, in this embodiment, the flow channel 3110 can be a straight flow channel or a wavy flow channel.

[0087] The liquid inlet end 3111 and the liquid outlet end 3112 are respectively close to the opposite two sides of the liquid cooling plate 3100. That is, the liquid inlet connector 3200 and the liquid outlet connector 3300 are respectively located on opposite sides of the battery pack, which facilitates the setting of the liquid inlet pipe and the liquid outlet pipe and effectively prevents interference between the liquid inlet pipe and the liquid outlet pipe.

[0088] Meanwhile, the design of the flow channel 3110 in this embodiment is relatively simple, which helps to reduce the manufacturing cost of the liquid cooling plate 3100.

[0089] Figure 8 A partial top view of the second battery pack structure without the liquid cooling plate 3100 is shown.

[0090] like Figure 2 and Figure 8 In some embodiments, multiple pouch cells 110 in the same cell stack 100 are arranged along a second direction (e.g., Figure 8 The cells are stacked in the X direction, and the second direction intersects with the first direction. The frame 200 includes two side plates 230 and multiple connecting beams 240. The two side plates 230 are respectively disposed on both sides of the cell stack 100 along the second direction. The two side plates 230 are connected and clamped to fix the cell stack 100 through the connecting beams 240.

[0091] For example, the accommodating space 250 may be enclosed by side panels 230 and connecting beams 240.

[0092] For example, the connecting beam 240 can be along a third direction (e.g. Figure 8 The Y-direction of the cell stack is located on the side of the cell stack 100.

[0093] For example, the connecting beam 240 is detachably connected to the side plate 230.

[0094] For example, the connecting beam 240 can be connected to the side plate 230 by means of plug-in, snap-fit, adhesive connection, bolt connection or welding.

[0095] For example, each cell stack 100 has connecting beams 240 on opposite sides along a third direction.

[0096] For example, along a third direction, the connecting beam 240 at the first end is connected to the first end of the side plate 230, and the connecting beam 240 at the last end is connected to the last end of the side plate 230. That is, the two side plates 230, the connecting beam 240 at the first end, and the connecting beam 240 at the last end can enclose a closed rectangular frame structure. The other connecting beams 240 are located within the rectangular frame structure.

[0097] Two side plates 230 disposed on opposite sides of the cell stack 100 can clamp the cell stack 100, keeping the multiple pouch cells 110 in the cell stack 100 in a stacked state. A connecting beam 240 can provide tension to the two side plates 230, maintaining a preset interval between them. Under the action of the frame 200 formed by the side plates 230 and the connecting beam 240, the multiple pouch cells 110 in the cell assembly module 1000 can be constructed as a whole, facilitating the assembly and transportation of the cell assembly module 1000.

[0098] like Figure 3 As shown, the heat conductor 300 at least fills the gap between the tab 111 and the adjacent connecting beam 240, and the heat conductor 300 extends along the first direction and is directly connected to the heat exchange assembly 3000, so as to facilitate direct heat transfer between the tab 111 and the heat exchange assembly 300, thereby further improving the heat exchange effect of the battery pack.

[0099] like Figure 4 and Figure 8 In some embodiments, the battery pack also includes a battery management system, which includes multiple slave control boards, each of which is mounted on a side plate 230 and is electrically connected to the corresponding cell stack 100.

[0100] For example, the slave control board connected to the same side plate 230 corresponds one-to-one with the battery cell stack 100.

[0101] For example, the control panel and side panel 230 can be connected by adhesive, snap-fit ​​or fasteners (e.g., bolts).

[0102] The slave control board is electrically connected to multiple pouch cells 110 in the corresponding cell stack 100, enabling it to collect voltage and temperature data of each connected pouch cell 110 and perform real-time monitoring. The slave control board can also communicate with the main control board in the battery management system, allowing it to send data to or receive control commands from the main control board.

[0103] The slave control board is connected to the side plate 230, which can fix the slave control board so that it can be held in a preset position in the housing space 250 and form a reliable connection with the pouch cell 110 and / or other devices. At the same time, in this embodiment, it is possible to eliminate the need to set up a separate fixing bracket for the slave control board in the battery pack, which helps to improve the internal space utilization of the battery pack and increase the energy density of the battery pack.

[0104] like Figure 3 and Figure 8 In some embodiments, the portion of the liquid inlet connector 3200 connected to the liquid cooling plate 3100 and / or the portion of the liquid outlet connector 3300 connected to the liquid cooling plate 3100 are disposed within the receiving space 250.

[0105] For example, the portion of the inlet connector 3200 that connects to the external inlet pipe can extend out of the frame 200 through the connecting beam 240. Similarly, the portion of the outlet connector 3300 that connects to the external outlet pipe can extend out of the frame 200 through the connecting beam 240.

[0106] In this embodiment, the cell stack 100 is disposed within the receiving space 250. Simultaneously, the liquid inlet connector 3200 and / or the liquid outlet connector 3300 are also disposed within the receiving space 250. The liquid cooling plate 3100 is disposed within the top opening 210 and / or bottom opening 220 of the frame 200. This allows the battery pack to be constructed into a more compact structure with a simpler overall appearance, facilitating the handling and assembly of the battery pack.

[0107] In some embodiments, the thermal conductor 300 includes a thermally conductive potting compound or a thermally conductive structural adhesive.

[0108] At least after the battery cell module 1000 is assembled, the thermally conductive potting compound in its flowing state can be injected into the gap between the frame 200 and the tab 111. The thermally conductive potting compound can automatically fill this gap and directly contact the tab 111. After a preset amount of thermally conductive potting compound is injected into this space (at this time, the thermally conductive potting compound can immerse the tab 111; when the tab 111 is connected to a busbar, the busbar is also immersed in the thermally conductive potting compound), the liquid cooling plate 3100 can be installed in the top opening 210. The liquid cooling plate 3100 can be tightly connected to the uncured thermally conductive potting compound.

[0109] After the thermally conductive potting compound cures, the cell stack 100 and the liquid cooling plate 3100 can be connected into a low-thermal-resistance whole using the thermally conductive potting compound, and their relative positions are fixed, which helps to ensure the safe and stable operation of the battery pack. The application of the thermally conductive structural adhesive is similar and will not be elaborated here.

[0110] like Figure 4 In some embodiments, the battery pack further includes a housing 2000, to which the cell assembly module 1000 is connected.

[0111] For example, the battery cell module 1000 can be connected to the housing 2000 by means of plug-in, snap-in, adhesive connection, welding or bolt connection.

[0112] In this embodiment, the cell assembly module 1000 can be directly connected to the housing 2000, eliminating the need to assemble the soft-pack cells 110 into a battery module. This not only reduces the number of battery pack components and material costs, simplifies the assembly process, and improves assembly efficiency, but also helps to increase the energy density of the battery pack.

[0113] like Figure 4 In some embodiments, the housing 2000 includes a plate-shaped lower housing 2100, and the frame 200 is connected to the lower housing 2100 by fasteners.

[0114] For example, the lower housing 2100 may also be provided with a flange surrounding the battery cell module 1000. The lower housing 2100 can be connected to the upper housing through the flange, so that the battery cell module 1000 is placed in the space formed by the upper housing and the lower housing 2100.

[0115] For example, fasteners can be bolts, screws, or threaded posts.

[0116] Taking the connection of the side plate 230 and the lower housing 2100 by fasteners as an example, after the fastener passes through the side plate 230, one end of the fastener that extends out of the side plate 230 can be connected and fixed to the lower housing 2100 (for example, when the fastener is a bolt, and the lower end extends out of the side plate 230 and can be threadedly connected to the lower housing 2100), and the other end (for example, the nut of the bolt) can abut against the side plate 230, so that the side plate 230 and the lower housing 2100 fit and are fixed, thereby realizing the connection between the battery cell module 1000 and the housing 2000.

[0117] In other embodiments, the heat exchange assembly 3000 is configured as the housing of the battery pack, and the cell assembly module 1000 is connected to the heat exchange assembly 3000. That is, the heat exchange assembly 3000 can be directly configured as the upper cover and / or lower cover of the battery pack to reduce the overall weight of the battery pack and effectively improve the energy density of the battery pack.

[0118] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims.

[0119] The various embodiments in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0120] The description in this application is given for illustrative purposes and is not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of this application and to enable those skilled in the art to understand this application and design various embodiments with various modifications suitable for a particular purpose.

[0121] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0122] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0123] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A battery pack, characterized in that, include: A cell assembly module includes a frame and at least one cell stack, wherein a receiving space is formed within the frame, the cell stack is disposed within the receiving space, and each cell stack includes a plurality of stacked pouch cells. A heat exchange component is disposed on at least one side of the battery cell assembly module along a first direction; the first direction is the height direction of the battery cell stack. A heat conductor is disposed at least between the frame and the tab side of the cell stack, and the heat conductor is thermally connected to the tab of the pouch cell and the heat exchange assembly respectively.

2. The battery pack according to claim 1, characterized in that, The heat conductor at least fills the gap between the tab and the adjacent portion of the frame.

3. The battery pack according to claim 1, characterized in that, The heat exchange assembly includes a liquid cooling plate, a liquid inlet connector, and a liquid outlet connector, the liquid inlet connector and the liquid outlet connector being respectively connected to the liquid cooling plate; the frame has a top opening at the top and a bottom opening at the bottom; the liquid cooling plate is disposed in the top opening and / or the bottom opening.

4. The battery pack according to claim 3, characterized in that, The liquid cooling plate includes a first liquid cooling plate and a second liquid cooling plate respectively disposed on opposite sides of the battery cell module along the first direction; The liquid inlet connector includes a liquid inlet tee connector, which is connected to the first liquid cooling plate and the second liquid cooling plate respectively; and / or The liquid outlet connector includes a liquid outlet tee connector, which is connected to the first liquid cooling plate and the second liquid cooling plate respectively.

5. The battery pack according to claim 3, characterized in that, Along the circumferential edge of the liquid cooling plate, the liquid inlet connector and the liquid outlet connector are both close to the same side edge of the liquid cooling plate, or respectively close to different side edges of the liquid cooling plate.

6. The battery pack according to claim 1, characterized in that, Multiple pouch cells in the same cell stack are stacked along a second direction, which intersects with the first direction; the frame includes two side plates and multiple connecting beams, the two side plates are respectively disposed on both sides of the cell stack along the second direction, and the two side plates are connected and clamped to fix the cell stack through the connecting beams.

7. The battery pack according to claim 6, characterized in that, The heat conductor at least fills the gap between the tab and the adjacent connecting beam, and the heat conductor extends along the first direction and is directly connected to the heat exchange assembly.

8. The battery pack according to claim 6, characterized in that, The battery pack also includes a battery management system, which includes multiple slave control boards. Each side plate is equipped with a slave control board, and the slave control board is electrically connected to the corresponding cell stack.

9. The battery pack according to claim 1, characterized in that, The thermal conductor includes thermally conductive potting compound or thermally conductive structural adhesive.

10. The battery pack according to claim 1, characterized in that, The battery pack also includes a housing, to which the cell assembly module is connected.

11. The battery pack according to claim 10, characterized in that, The housing includes a plate-shaped lower housing, and the frame is connected to the lower housing by fasteners.

12. The battery pack according to claim 1, characterized in that, The heat exchange component is configured as the housing of the battery pack, and the cell assembly module is connected to the heat exchange component.

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