A battery pack

Abstract

The application discloses a battery pack, comprising: a battery management system, a temperature acquisition assembly and a cell group; the battery pack has a first direction, a second direction and a third direction perpendicular to each other; the cell group comprises a plurality of soft package cells arranged along the first direction, the battery management system is arranged on one side of the cell group along the third direction, and the plurality of soft package cells are electrically connected with the battery management system respectively; the temperature acquisition assembly is arranged on one side of the cell group along the second direction, one end of the temperature acquisition assembly is attached to the side surface of the cell group to acquire the temperature of the cell group, and the other end of the temperature acquisition assembly is detachably electrically connected with the battery management system. In this way, by detachably electrically connecting the temperature acquisition assembly with the battery management system, the connection structure of the temperature acquisition assembly and the battery management system is effectively simplified, the installation complexity is reduced, and therefore the assembly and maintenance are facilitated.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack. Background Technology

[0002] With the development of new energy vehicles, the energy density of batteries is increasing, and the requirements for thermal runaway protection are constantly rising. It is necessary to accurately obtain battery temperature and voltage in order to manage the battery.

[0003] In related technologies, a battery pack includes a cell assembly, a temperature sensor, and a Battery Management System (BMS) module. The cell assembly and the BMS are electrically connected, and the temperature sensor is used to collect the temperature of the cell assembly and transmit the temperature information to the BMS. However, the connection structure between the temperature sensor and the BMS in these technologies is complex and inconvenient to install and use. Utility Model Content

[0004] This application aims to provide a battery pack that can solve the problem of complex connection structure between temperature sensor and battery management system.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application provides a battery pack comprising: a battery management system, a temperature acquisition component, and a cell assembly; the battery pack has a first direction, a second direction, and a third direction that are mutually perpendicular to each other; the cell assembly includes a plurality of pouch cells arranged along the first direction, the battery management system is disposed on one side of the cell assembly along the third direction, and the plurality of pouch cells are electrically connected to the battery management system respectively; the temperature acquisition component is disposed on one side of the cell assembly along the second direction, one end of the temperature acquisition component is attached to the side of the cell assembly to acquire the temperature of the cell assembly, and the other end of the temperature acquisition component is detachably electrically connected to the battery management system.

[0007] Optionally, the battery management system includes a connection component and a main board. The main board is disposed on one side of the cell assembly along the third direction. The connection component is disposed on the main board and electrically connected to the main board. The temperature acquisition component includes a flexible circuit board and a temperature sensor. The flexible circuit board is disposed on one side of the cell assembly along the second direction. The flexible circuit board has a first end and a second end disposed opposite to each other. The temperature sensor is disposed at the first end and electrically connected to the flexible circuit board. The temperature sensor is attached to the side of the cell assembly to acquire the temperature of the cell assembly. The second end is plugged into the connection component.

[0008] Optionally, the connection assembly includes a crimping body and an electrical connector; the crimping body is disposed on the motherboard, and the crimping body has a slot, the second end is inserted into the slot, one end of the electrical connector is disposed in the slot and electrically connected to the second end, and the other end of the electrical connector is electrically connected to the motherboard.

[0009] Optionally, the slot wall is provided with a plurality of clamping strips; the plurality of clamping strips are spaced apart along the first direction, the clamping strips are located on the side of the flexible circuit board away from the electrical connector, and the clamping strips abut against the flexible circuit board.

[0010] Optionally, multiple electrical connectors are provided; the multiple electrical connectors are spaced apart along the first direction.

[0011] Optionally, the connecting component further includes a button; the button is movably connected to the crimping body, the button is provided with a limiting boss, the crimping body is provided with a communicating hole communicating with the slot, the limiting boss passes through the communicating hole, the second end is provided with a limiting groove, and the button is movable relative to the crimping body so that the limiting boss at least partially extends into the slot and is limited and engaged with the limiting groove.

[0012] Optionally, the crimping body is provided with a limiting hole corresponding to the limiting boss, and the limiting boss extends at least partially into the limiting hole.

[0013] Optionally, the second end is provided with a bent section; the connecting component is located on the side of the motherboard away from the battery cell assembly, and the bent section is at least partially inserted into the connecting component.

[0014] Optionally, the temperature acquisition component further includes a protective element; the protective element is connected to the first end, and the protective element and the flexible circuit board enclose a protective cavity, with the temperature acquisition element located inside the protective cavity.

[0015] Optionally, it also includes an adhesive component; the adhesive component is disposed on the side of the temperature acquisition component away from the battery cell assembly, and a portion of the adhesive component connects the side of the temperature acquisition component and the battery cell assembly.

[0016] In this embodiment, the battery management system is located on one side of the cell assembly along a third direction, and the temperature acquisition component is located on one side of the cell assembly along a second direction. One end of the temperature acquisition component is attached to the side of the cell assembly to collect the temperature of the cell assembly, and the other end of the temperature acquisition component is detachably electrically connected to the battery management system. This detachable electrical connection between the temperature acquisition component and the battery management system effectively simplifies the connection structure of the temperature acquisition component, reduces installation complexity, and facilitates assembly and maintenance.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of a battery pack according to an embodiment of this application;

[0020] Figure 2 This is a schematic diagram showing the connection relationship between the battery management system, temperature acquisition component, and battery cell assembly according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram showing the connection relationship between the flexible circuit board and the connecting components according to an embodiment of this application;

[0022] Figure 4 This is a schematic diagram showing the connection relationship between the flexible circuit board and the clamping strip according to an embodiment of this application;

[0023] Figure 5 This is a perspective view of the connecting component according to an embodiment of this application from a first angle;

[0024] Figure 6 This is a schematic bottom view of a connection component according to an embodiment of this application;

[0025] Figure 7 This is a perspective view of the connecting component according to an embodiment of this application from a second angle;

[0026] Figure 8 This is a schematic diagram of a temperature acquisition component according to an embodiment of this application.

[0027] Figure label:

[0028] 1. Battery Management System; 11. Connecting Components; 111. Crimping Body; 112. Button; 113. Slot; 114. Limiting Hole; 115. Clamping Strip; 116. Electrical Connector; 117. Limiting Boss; 118. Communicating Hole; 12. Main Board;

[0029] 2. Temperature acquisition component; 21. Flexible circuit board; 211. First end; 212. Second end; 213. Bending section; 22. Limiting groove; 23. Temperature acquisition element; 24. Protective element; 25. Protective cavity;

[0030] 3. Cell assembly; 31. Soft-pack cell; 4. Adhesive component; 5. Housing; 6. Interface; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0031] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are 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, and therefore should not be construed as a limitation of this application.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] With the development of new energy vehicles, the energy density of battery cells is increasing, and the requirements for thermal runaway protection are becoming more stringent. This necessitates accurate acquisition of cell temperature and voltage for battery management. Currently, common methods for acquiring voltage and temperature data involve using wiring harnesses or flexible printed circuit boards (FPCs) to aggregate signals onto connectors, which then interlock with ports on the battery management system for signal transmission and monitoring. However, these methods require integrated connectors and involve complex soldering processes, resulting in high costs.

[0036] Currently, temperature sensors are generally placed on the large surface of the battery cell or on the terminal post of the battery cell to collect the temperature of the battery cell. However, due to the shape and assembly characteristics of pouch batteries, temperature sensors are not easy to attach to the large surface of the battery cell.

[0037] The battery pack provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0038] like Figure 1 and Figure 2 As shown in the figure, this application proposes a battery pack, including: a battery management system 1, a temperature acquisition component 2, and a cell assembly 3; the battery pack has a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other; the cell assembly 3 includes a plurality of pouch cells 31 arranged along the first direction X, the battery management system 1 is disposed on one side of the cell assembly 3 along the third direction Z, and the plurality of pouch cells 31 are electrically connected to the battery management system 1 respectively; the temperature acquisition component 2 is disposed on one side of the cell assembly 3 along the second direction Y, one end of the temperature acquisition component 2 is attached to the side of the cell assembly 3 to acquire the temperature of the cell assembly 3, and the other end of the temperature acquisition component 2 is detachably electrically connected to the battery management system 1.

[0039] It should be noted that, as Figure 2 As shown, the first direction X is the width direction of the battery pack, the second direction Y is the length direction of the battery pack, and the third direction Z is the height direction of the battery pack.

[0040] In this embodiment, the battery management system 1 is positioned on the Z-side of the cell assembly 3, and the temperature acquisition component 2 is positioned on the Y-side of the cell assembly 3. One end of the temperature acquisition component 2 is attached to the side of the cell assembly 3 to acquire its temperature, and the other end is detachably electrically connected to the battery management system 1. This detachable electrical connection between the temperature acquisition component 2 and the battery management system 1 effectively simplifies their connection structure, reduces installation complexity, and facilitates assembly and maintenance.

[0041] Furthermore, the orthogonal layout optimizes space utilization, thereby reducing the size of the battery pack. Simultaneously, the temperature acquisition component 2 is attached to the side of the cell assembly 3, ensuring real-time and accurate temperature acquisition, improving the reliability and safety of battery thermal management, and thus reducing the risk of thermal runaway in the battery pack.

[0042] It should be noted that, as Figure 2 As shown, the battery cell assembly 3 includes multiple pouch cells 31, which are stacked along a first direction X. Each pouch cell 31 has two opposing end faces in a second direction Y. The end faces of the stacked pouch cells 31 on the same side in the second direction Y together form the side surface of the battery cell assembly 3. Furthermore, a temperature sensing component 2 is disposed on one side of the battery cell assembly 3 along the second direction Y, such that one end of the temperature sensing component 2 is in contact with the side surface of the battery cell assembly 3. Here, "one end of the temperature sensing component 2 is in contact with the side surface of the battery cell assembly 3" means that one end of the temperature sensing component 2 is in contact with the end face of at least some of the pouch cells 31 in the battery cell assembly 3 along the second direction Y.

[0043] In some embodiments, the battery pack further includes a housing 5, and the battery cell assembly 3 is disposed in the housing 5. In this application, the battery cell is a pouch cell 31, and the outer shell of the pouch cell 31 is an aluminum-plastic film. Since the structure of the aluminum-plastic film itself is relatively soft, the pouch cell 31 is prone to displacement in the housing 5. This problem can be reduced by pre-pressing the large surface of the battery cell assembly 3. However, if the temperature acquisition component 2 is placed on the large surface of the battery cell assembly 3, it will affect the acquisition accuracy of the temperature acquisition component 2. Therefore, in this application, the temperature acquisition component 2 is placed on one side of the battery cell assembly 3 along the second direction Y, that is, on the side of the battery cell assembly 3, which can both acquire the temperature of the battery cell assembly 3 and leave space for the pre-pressing of the battery cell assembly 3.

[0044] It should be noted that the "large surface" of the pouch cell 31 refers to the area along the stacking direction of the pouch cells 31, i.e., along... Figure 1 In the first direction X, the surface of the soft-pack battery cell 31 is the large surface of the soft-pack battery cell 31; along the second direction, the surface of the soft-pack battery cell 31 is the side surface of the soft-pack battery cell 31.

[0045] Existing battery cells are rigid-cased cells. Since rigid-cased cells do not require pre-pressure, temperature sensors are typically placed on the large surface of the cell or on the terminal posts to collect the cell's temperature. The signals are then collected by a wiring harness or flexible circuit board and sent to a connector, which in turn plugs into a port on the battery management system to achieve signal transmission and monitoring. Because the wiring harnesses and flexible circuit boards used in this method require their own connectors, involving complex soldering processes, the cost is relatively high.

[0046] In some embodiments, the battery pack further includes an interface 6, which is electrically connected to the motherboard 12 and is used to provide power to the electrical device.

[0047] Optionally, such as Figure 2 and Figure 3 As shown, the battery management system 1 includes a connection component 11 and a main board 12. The main board 12 is located on one side of the cell assembly 3 along the third direction Z. The connection component 11 is located on the main board 12 and is electrically connected to the main board 12. The temperature acquisition component 2 includes a flexible circuit board 21 and a temperature sensor 23. The flexible circuit board 21 is located on one side of the cell assembly 3 along the second direction Y. The flexible circuit board 21 has a first end 211 and a second end 212 that are arranged opposite to each other. The temperature sensor 23 is located at the first end 211 and is electrically connected to the flexible circuit board 21. The temperature sensor 23 is attached to the side of the cell assembly 3 to acquire the temperature of the cell assembly 3. The second end 212 is inserted into the connection component 11.

[0048] In this embodiment, the flexible circuit board 21 is disposed on the side of the cell assembly 3 along the second direction Y, and the temperature sensing element 23 is attached to the side of the cell assembly 3 to collect temperature. Simultaneously, the second end 212 of the flexible circuit board 21 is inserted into the main board 12 connection assembly 11. This simplifies the connection structure between the flexible circuit board 21 and the battery management system 1, improving assembly efficiency. Furthermore, based on the flexibility of the flexible circuit board 21, attaching the temperature sensing element 23 to the side of the cell assembly 3 ensures the accuracy and real-time nature of the temperature data collected by the temperature sensing element 23, thereby enhancing the reliability and safety of the battery pack's thermal management and reducing the risk of thermal runaway.

[0049] Specifically, when the temperature sensor 23 is attached to the side of the battery cell assembly 3, the temperature sensor 23 transmits the collected temperature data to the connection component 11 through the flexible circuit board 21, and then to the main board 12 through the connection component 11, thereby realizing the transmission of temperature data.

[0050] In some embodiments, the temperature sensing element 23 may be a negative temperature coefficient thermistor (NTC), thermocouple, platinum resistance thermometer, etc. The specific selection of the temperature sensing element 23 can be made by those skilled in the art according to actual needs, and the embodiments of this application are not limited herein.

[0051] In addition, multiple temperature sensing elements 23 can be set, and each temperature sensing element 23 is electrically connected to the flexible circuit board 21. In this way, the temperature of the battery cell assembly 3 can be collected by multiple temperature sensing elements 23, ensuring the accuracy of the data.

[0052] In some embodiments, the flexible circuit board 21 in this application may be a polyimide flexible circuit board, a polyester flexible circuit board, a polyethylene naphthalate flexible circuit board, or an epoxy resin glass fiber flexible circuit board, etc. Those skilled in the art can choose according to actual needs, and the embodiments of this application are not limited here.

[0053] Of course, a polyimide protective film or an epoxy resin fiberglass protective film can also be directly applied to the surface of the flexible circuit board 21 to improve the insulation performance of the flexible circuit board 21.

[0054] Optionally, such as Figure 2 , Figure 4 and Figure 5 As shown, the connection component 11 includes a crimping body 111 and an electrical connector 116. The crimping body 111 is disposed on the motherboard 12 and has a slot 113. The second end 212 is inserted into the slot 113. One end of the electrical connector 116 is disposed in the slot 113 and electrically connected to the second end 212. The other end of the electrical connector 116 is electrically connected to the motherboard 12.

[0055] In this embodiment, the crimping body 111 is mounted on the motherboard 12, the second end 212 is inserted into the slot 113 of the crimping body 111, one end of the electrical connector 116 is located in the slot 113 and electrically connected to the second end 212, and the other end of the electrical connector 116 is electrically connected to the motherboard 12. In this way, the physical connection between the flexible circuit board 21 and the crimping body 111 is achieved through a plug-in connection, and the electrical connection between the flexible circuit board 21 and the motherboard 12 is achieved through the electrical connector 116. This effectively reduces the number of parts, thereby improving connection efficiency and reducing production costs.

[0056] In some embodiments, such as Figure 4 and Figure 5 As shown, the electrical connector 116 can be a metal strip, which is inclined, with one end tilted downwards to connect electrically to the motherboard 12 and the other end tilted upwards to connect electrically to the flexible circuit board 21. Alternatively, the electrical connector 116 can also be a torsion spring pin, a metal spring array, or a conductive adhesive strip, etc. The specific selection of the electrical connector 116 can be made by those skilled in the art according to actual needs, and this application embodiment does not impose any limitations.

[0057] In some embodiments, a circuit copper wire is provided on the second end 212, one end of which is connected to the temperature sensing element 23, and the other end of which is electrically connected to the electrical connector 116.

[0058] Optionally, such as Figure 4 and Figure 5 As shown, the slot 113 has multiple clamping strips 115 on its slot wall; the multiple clamping strips 115 are spaced apart along the first direction X, and the clamping strips 115 are located on the side of the flexible circuit board 21 away from the electrical connector 116, and the clamping strips 115 abut against the flexible circuit board 21.

[0059] In this embodiment, multiple clamping strips 115 are provided on the wall of the slot 113. These clamping strips 115 are spaced apart along a first direction X, located on the side of the flexible circuit board 21 opposite to the electrical connector 116, and abut against the flexible circuit board 21. This clamping strips 115 press the flexible circuit board 21, improving contact between the flexible circuit board 21 and the electrical connector 116, preventing them from detaching and thus avoiding signal transmission interruption. Furthermore, the clamping strips 115 also prevent the flexible circuit board 21 from slipping out of the slot 113, thereby increasing the connection strength between the flexible circuit board 21 and the connecting assembly 11.

[0060] In some embodiments, such as Figure 5 As shown, one end of the clamping strip 115 is fixedly seated on the crimping body 111, and one end of the clamping strip 115 extends out of the slot 113 and is fixedly connected to the crimping body 111; the other end of the clamping strip 115 is a cantilever end, and the other end of the clamping strip 115 is suspended in the slot 113; when the flexible circuit board 21 extends into the slot 113, the flexible circuit board 21 abuts against the clamping strip 115, and the clamping strip 115 presses the flexible circuit board 21 toward the direction of electrical connection, thereby making the electrical connection between the flexible circuit board 21 and the electrical connector 116 tighter.

[0061] Optionally, such as Figure 5 As shown, multiple electrical connectors 116 are provided; the multiple electrical connectors 116 are spaced apart along the first direction X.

[0062] In this embodiment, multiple electrical connectors 116 are spaced apart along a first direction X. This allows for electrical connection between the flexible circuit board 21 and the main board 12, avoiding signal transmission interruption due to the failure of a single electrical connector 116, thereby improving the fault tolerance of the transmission.

[0063] It should be noted that the number of electrical connectors 116 can be selected according to actual needs, and this embodiment of the application does not impose any restrictions.

[0064] Optionally, such as Figure 5 and Figure 6 The connecting component 11 also includes a button 112; the button 112 is movably connected to the crimping body 111, the button 112 is provided with a limiting boss 117, the crimping body 111 is provided with a communicating hole 118 communicating with the slot 113, the limiting boss 117 passes through the communicating hole 118, and the second end 212 is provided with a limiting groove 22. The button 112 can move relative to the crimping body 111 so that the limiting boss 117 at least partially extends into the slot 113 and is limited and engaged with the limiting groove 22.

[0065] In this embodiment, by movably connecting the button 112 to the crimping body 111, and with the limiting protrusion 117 on the button 112 passing through the communicating hole 118 in the crimping body 111, the button 112 can move relative to the crimping body 111, allowing the limiting protrusion 117 to extend into the slot 113 and engage with the limiting groove 22. Thus, the button 112 can drive the limiting protrusion 117 to move, adjusting the relative position of the limiting protrusion 117 and the limiting groove 22, thereby locking the flexible circuit board 21 and preventing the risk of the flexible circuit board 21 loosening under high vibration conditions.

[0066] Specifically, the connecting assembly 11 also includes a rotating shaft and a torsion spring. One end of the rotating shaft is connected to the button 112, and the other end is connected to the pressing body 111. The torsion spring is sleeved on the rotating shaft, with one end connected to the pressing button 112 and the other end connected to the pressing body 111. When the button 112 is pressed, the button 112 rotates upward relative to the pressing body 111 around the rotating shaft, causing one end of the torsion spring connected to the button 112 to rotate, while the other end of the torsion spring is fixed to the pressing body 111, resulting in the torsion spring torsionally storing energy. When the button 112 is released, the stored energy of the torsion spring releases its elastic force, forcing the button 112 to rotate in the opposite direction around the rotating shaft to reset, thus resetting the pressing body 111 to its initial state.

[0067] Optionally, such as Figure 3 and Figure 7 As shown, the crimping body 111 is provided with a limiting hole 114 corresponding to the limiting boss 117, and the limiting boss 117 extends at least partially into the limiting hole 114.

[0068] Specifically, such as Figure 3 As shown, the limiting hole 114 is located below the limiting boss 117 along the third direction Z, and the limiting hole 114 is connected to the limiting groove 22 of the flexible circuit board 21.

[0069] In this embodiment, a limiting hole 114 is provided in the crimping body 111, and the limiting boss 117 extends at least partially into the limiting hole 114. In this way, the limiting boss 117 and the limiting hole 114 are matched to limit the connection between the limiting boss 117 and the crimping plate, thereby further avoiding the risk of the flexible circuit board 21 becoming loose.

[0070] Optionally, such as Figure 8 As shown, the second end 212 is provided with a bending section 213; the connecting component 11 is located on the side of the main board 12 away from the battery cell group 3, and the bending section 213 is at least partially inserted into the connecting component 11.

[0071] In this embodiment, by providing a bent section 213 at the second end 212, the connecting component 11 is located on the side of the main board 12 away from the cell assembly 3, and the bent section 213 is at least partially inserted into the connecting component 11. This transforms the vertical insertion into a parallel insertion, facilitating adaptation to battery pack insertion requirements. Furthermore, the bent section 213 can adapt to different relative positions of the connecting components 11, exhibiting good adaptability.

[0072] Optionally, such as Figure 2 and Figure 8 As shown, the temperature acquisition component 2 also includes a protective component 24; the protective component 24 is connected to the first end 211, and the protective component 24 and the flexible circuit board 21 enclose a protective cavity 25, and the temperature acquisition component 23 is located inside the protective cavity 25.

[0073] In this embodiment, a protective member 24 is provided at the first end 211 of the flexible circuit board 21 to form a protective cavity 25 by the protective member 24 and the flexible circuit board 21, and the temperature sensing element 23 is located inside the protective cavity 25. In this way, the protective member 24 surrounds the temperature sensing element 23 to form isolation and protection for the temperature sensing element 23, thereby improving the detection accuracy of the temperature sensing element 23.

[0074] In some embodiments, the protective element 24 may be made of insulating materials such as plastic or rubber, and this application embodiment does not limit this.

[0075] Optionally, such as Figure 2 As shown, it also includes an adhesive component 4; the adhesive component 4 is located on the side of the temperature acquisition component 2 away from the battery cell assembly 3, and part of the adhesive component 4 connects the side of the temperature acquisition component 2 and the side of the battery cell assembly 3.

[0076] In this embodiment, by placing the adhesive 4 on the side of the temperature acquisition component 2 facing away from the battery cell assembly 3, the adhesive 4 can be used to bond the sides of the temperature acquisition component 2 and the battery cell assembly 3. In this way, a stable connection between the flexible circuit board 21 and the battery cell assembly 3 is achieved through the adhesive 4, making the operation convenient and quick.

[0077] Specifically, the adhesive component 4 includes a first adhesive part and a second adhesive part. The first adhesive part is bonded to the temperature acquisition component 2, and the second adhesive part is located on both sides of the first adhesive part and connected to the first adhesive part. The second adhesive part is bonded and fixed to a portion of the soft-pack battery cells 31 in the battery cell group 3.

[0078] In some embodiments, the adhesive 4 can be disposed in the middle of the flexible circuit board 21 to fix the flexible circuit board 21, or it can be flush with the upper end of the side of the battery cell assembly 3 to prevent the flexible circuit board 21 from warping. Furthermore, the adhesive 4 can be wrapped around the battery cell assembly 3 to pre-tighten the battery cell assembly 3.

[0079] In some embodiments, the adhesive 4 may be insulating tape, insulating adhesive, or double-sided tape, etc., and this application does not limit this.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0081] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: Battery management system (1), temperature acquisition component (2), and cell assembly (3); The battery pack has a first direction (X), a second direction (Y), and a third direction (Z) that are perpendicular to each other; The cell assembly (3) includes a plurality of pouch cells (31) arranged along the first direction (X), and the battery management system (1) is located on one side of the cell assembly (3) along the third direction (Z), and the plurality of pouch cells (31) are electrically connected to the battery management system (1). The temperature acquisition component (2) is disposed on one side of the cell assembly (3) along the second direction (Y). One end of the temperature acquisition component (2) is attached to the side of the cell assembly (3) to acquire the temperature of the cell assembly (3). The other end of the temperature acquisition component (2) is detachably electrically connected to the battery management system (1).

2. The battery pack according to claim 1, characterized in that, The battery management system (1) includes a connection component (11) and a motherboard (12). The motherboard (12) is located on one side of the cell group (3) along the third direction (Z). The connection component (11) is located on the motherboard (12) and is electrically connected to the motherboard (12). The temperature acquisition component (2) includes a flexible circuit board (21) and a temperature acquisition element (23). The flexible circuit board (21) is disposed on one side of the battery cell assembly (3) along the second direction (Y). The flexible circuit board (21) has a first end (211) and a second end (212) arranged opposite to each other. The temperature sensing element (23) is disposed at the first end (211) and electrically connected to the flexible circuit board (21). The temperature sensing element (23) is attached to the side of the battery cell assembly (3) to collect the temperature of the battery cell assembly (3). The second end (212) is inserted into the connecting component (11).

3. The battery pack according to claim 2, characterized in that, The connection assembly (11) includes a crimping body (111) and an electrical connector (116); The crimping body (111) is disposed on the motherboard (12). The crimping body (111) has a slot (113). The second end (212) is inserted into the slot (113). One end of the electrical connector (116) is disposed in the slot (113) and electrically connected to the second end (212). The other end of the electrical connector (116) is electrically connected to the motherboard (12).

4. The battery pack according to claim 3, characterized in that, The slot (113) has a plurality of clamping strips (115) on its wall; the plurality of clamping strips (115) are spaced apart along the first direction (X), the clamping strips (115) are located on the side of the flexible circuit board (21) away from the electrical connector (116), and the clamping strips (115) abut against the flexible circuit board (21).

5. The battery pack according to claim 3, characterized in that, The electrical connectors (116) are provided in multiple ways; the multiple electrical connectors (116) are spaced apart along the first direction (X).

6. The battery pack according to claim 3, characterized in that, The connection component (11) also includes a button (112); The button (112) is movably connected to the crimping body (111). The button (112) is provided with a limiting boss (117). The crimping body (111) is provided with a connecting hole (118) communicating with the slot (113). The limiting boss (117) passes through the connecting hole (118). The second end (212) is provided with a limiting groove (22). The button (112) can move relative to the crimping body (111) so that the limiting boss (117) at least partially extends into the slot (113) and is limited and engaged with the limiting groove (22).

7. The battery pack according to claim 6, characterized in that, The crimping body (111) is provided with a limiting hole (114) corresponding to the limiting boss (117), and the limiting boss (117) extends at least partially into the limiting hole (114).

8. The battery pack according to claim 2, characterized in that, The second end (212) is provided with a bending section (213); the connecting component (11) is located on the side of the main board (12) away from the battery cell assembly (3), and the bending section (213) is at least partially inserted into the connecting component (11).

9. The battery pack according to claim 2, characterized in that, The temperature acquisition component (2) also includes a protective component (24); The protective element (24) is connected to the first end (211), and the protective element (24) and the flexible circuit board (21) enclose a protective cavity (25), and the temperature sampling element (23) is located inside the protective cavity (25).

10. The battery pack according to any one of claims 1-9, characterized in that, It also includes adhesive components (4); The adhesive (4) is located on the side of the temperature acquisition component (2) away from the battery cell assembly (3), and the adhesive (4) connects the side of the temperature acquisition component (2) and the battery cell assembly (3).

Images