Battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to a battery pack, which comprises battery monomers and an acquisition assembly, a plurality of battery monomers are arranged at intervals along the length direction of the battery pack, and a heat-conducting partition plate is arranged between every two adjacent battery monomers; the acquisition assembly at least comprises a pressure acquisition device arranged between the battery monomer and the adjacent heat-conducting partition plate and is used for acquiring the pressure applied to the adjacent heat-conducting partition plate by the battery monomer. According to the battery pack disclosed by the invention, the swelling of the battery monomers can extrude the heat-conducting partition plate to generate pressure which is sensed by the pressure acquisition device, so that the swelling phenomenon of the battery is detected in time, and the risk of fire and explosion caused by continuous use after the swelling phenomenon of the battery pack occurs is avoided.

Description

Technical Field

[0001] This application relates to the technical field of battery packs, and particularly to a battery pack. Background Art

[0002] As a core component of new energy electric vehicles, the safety and working reliability of the battery pack directly affect the use safety of new energy electric vehicles.

[0003] Battery bulging refers to an abnormal situation inside the battery, resulting in phenomena such as expansion or deformation. Among them, poor charger quality, long charging time, internal battery faults, frequent use of fast charging stations, high charging temperature, frequent use of large current charging, etc. can all cause the battery to bulge. If the battery bulging phenomenon is serious and not detected in time, there is a high probability of causing the battery to catch fire or even explode, resulting in major safety accidents, casualties and property losses. In view of the above problems, it is urgent to take corresponding measures to monitor in real time whether the battery bulges during operation, especially to accurately collect the bulging conditions of each battery cell.

[0004] In view of this, the present application is specifically proposed. Utility Model Content

[0005] This application provides a battery pack to solve the problem of how to improve the use safety of the battery.

[0006] This application provides a battery pack, including:

[0007] Battery cells, a plurality of the battery cells are arranged at intervals along the length direction of the battery pack, and a heat conduction partition is arranged between two adjacent battery cells;

[0008] The acquisition component at least includes a pressure acquisition device arranged between the battery cell and the adjacent heat conduction partition for acquiring the pressure exerted by the battery cell on the adjacent heat conduction partition.

[0009] In some embodiments, the heat conduction partition includes:

[0010] A plate body, the plate body has a first surface and a second surface opposite to each other along the length direction, and at least two pressure acquisition devices are respectively arranged on the first surface and the second surface;

[0011] Flexible heat conduction layers, two flexible heat conduction layers are respectively attached to the first surface and the second surface, and the flexible heat conduction layer is provided with a hollowed-out part to enable the pressure acquisition device to pass through the corresponding hollowed-out part and fit with the adjacent battery cell.

[0012] In some of these embodiments, the acquisition component further includes a temperature acquisition device. At least two of the temperature acquisition devices are respectively disposed on the first surface and the second surface, pass through the corresponding hollow portions, and are disposed opposite to the adjacent battery cells, for acquiring the temperature between the plate body and the adjacent battery cells.

[0013] In some of these embodiments, the battery pack further includes:

[0014] a prompting component for performing a prompting operation;

[0015] a control component, the control component is respectively connected to the prompting component and the pressure acquisition device, and is configured to control the prompting component to perform the prompting operation when the pressure data acquired by the pressure acquisition device is greater than or equal to a first set pressure.

[0016] In some of these embodiments, the acquisition component further includes a temperature acquisition device disposed on the heat conduction partition board, and the temperature acquisition device is configured to acquire the temperature of the heat conduction partition board;

[0017] The control component is connected to the temperature acquisition device, and is further configured to control the prompting component to perform the prompting operation when the temperature data acquired by the temperature acquisition device is greater than or equal to a first set temperature.

[0018] In some of these embodiments, the battery pack further includes a heat dissipation component for performing a heat dissipation operation on the heat conduction partition board;

[0019] The control component is connected to the heat dissipation component, and is further configured to control the heat dissipation component to perform the heat dissipation operation when the temperature data acquired by the temperature acquisition device is greater than or equal to a second set temperature, wherein the second set temperature is less than the first set temperature.

[0020] In some of these embodiments, the prompting component is an alarm device that emits a sound and / or a photoelectric signal to prompt the user when the pressure data reaches the first set pressure and / or the temperature data reaches the first set temperature.

[0021] In some of these embodiments, the heat dissipation component includes:

[0022] a water tank for storing, adding or replacing a coolant;

[0023] a liquid cooling pipe, at least a part of the liquid cooling pipe penetrates through the heat conduction partition board;

[0024] a liquid cooling power source, the liquid cooling power source and the water tank are connected through the liquid cooling pipe to form a heat dissipation loop,

[0025] Wherein, the control component is connected to the liquid cooling power source, and is further configured to control the liquid cooling power source to drive the coolant to circulate in the heat dissipation loop when the temperature data collected by the temperature acquisition device is greater than or equal to the second set temperature.

[0026] In some embodiments, the liquid cooling pipe includes:

[0027] A first coiled pipe portion that penetrates the heat conduction partition, and an inlet end of the first coiled pipe portion is connected to the liquid cooling power source;

[0028] A second coiled pipe portion, two ends of the second coiled pipe portion are respectively connected to an outlet end of the first coiled pipe portion and the water tank,

[0029] Wherein, the heat dissipation component further includes a heat exchange device configured to perform a heat dissipation operation on the second coiled pipe portion to convert the high-temperature coolant into a normal-temperature coolant.

[0030] In some embodiments, the heat exchange device includes:

[0031] Heat dissipation fins, the heat dissipation fins are arranged above the water tank, and at least a part of the second coiled pipe portion penetrates through the heat dissipation fins;

[0032] Heat dissipation fans, a plurality of the heat dissipation fans are arranged at intervals on the heat dissipation fins and are oppositely arranged with respect to the second coiled pipe portion.

[0033] After adopting the above technical solutions, the present application has the following beneficial effects compared with the prior art.

[0034] 1. In the battery pack of the present application, when a battery cell bulges, the expansion force generated by the bulging of the battery cell will squeeze the heat conduction partition, and then it is sensed by the pressure acquisition device, realizing the timely detection of the battery bulging phenomenon, and avoiding the risk of fire and explosion when the battery pack continues to be used after the battery bulging phenomenon occurs. Description of the Drawings

[0035] Figure 1 is a schematic structural diagram of a battery pack in an embodiment of the present application;

[0036] Figure 2 is Figure 1 a partial enlarged view of part A in

[0037] Figure 3 is a schematic connection diagram of a heat dissipation component, a heat conduction partition and an acquisition component in an embodiment of the present application.

[0038] In the figure: 100, battery pack; 110, housing; 111, sound transmission hole; 120, battery cell; 130, heat conduction partition; 131, plate body; 1311, first surface; 1312, second surface; 132, flexible heat conduction layer; 1321, hollow part; 140, acquisition component; 141, pressure acquisition device; 142, temperature acquisition device; 150, prompt component; 151, sound generator; 152, indicator light; 160, control component; 170, heat dissipation component; 171, water tank; 172, liquid cooling pipe; 1721, first coil part; 17211, coil section; 17212, U-shaped pipe section; 1722, second coil part; 173, liquid cooling power source; 174, heat exchange device; 1741, heat dissipation fin; 1742, heat dissipation fan; 180, support column. Detailed implementation manners

[0039] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0040] In an embodiment of the present application, a battery pack 100 is provided, which is applied to an energy storage device. The energy storage device may be a device with a battery swapping function such as a vehicle or a working machine. For the specific structure of the battery pack 100, please refer to Figures 1 to 3 , which includes battery cells 120 and an acquisition component 140. Among them, a plurality of battery cells 120 are arranged at intervals along the length direction of the battery pack 100, and a heat conduction partition 130 is arranged between two adjacent battery cells 120; the acquisition component 140 at least includes a pressure acquisition device 141 arranged between the battery cell 120 and the adjacent heat conduction partition 130, and is used to acquire the pressure applied by the battery cell 120 to the adjacent heat conduction partition 130.

[0041] According to the battery pack 100 of the application, when the battery cell 120 bulges, the expansion force generated by the bulge of the battery cell 120 will squeeze the heat conduction partition 130, and then be sensed by the pressure acquisition device 141, realizing the timely detection of the battery bulge phenomenon and avoiding the risk of fire and explosion when the battery pack 100 continues to be used after the bulge phenomenon occurs.

[0042] For the specific structure of the heat conduction partition 130, please refer to Figure 1, which includes a plate body 131 and a flexible heat-conducting layer 132. Among them, the plate body 131 has a first surface 1311 and a second surface 1312 that are opposite to each other along the length direction of the battery pack 100. At least two pressure acquisition devices 141 are respectively arranged on the first surface 1311 and the second surface 1312, and are used for acquiring the pressures exerted by two adjacent battery cells 120 on different surfaces of the plate body 131 and / or the pressures exerted on different positions on the same surface of the plate body 131. The more the number of pressure acquisition devices 141, the more accurate the pressure acquisition result; two flexible heat-conducting layers 132 are respectively attached to the first surface 1311 and the second surface 1312, so that the plate body 131 contacts the largest side surface of the adjacent battery cell 120 through the corresponding flexible heat-conducting layer 132, and the maximum area of heat-conducting connection can be realized. Compared with the situation where the plate body 131 directly abuts against the largest side surface of the battery cell 120, it is not easy to have the situation that the plate body 131 cannot be completely attached to the largest side surface of the battery cell 120, and the heat-conducting efficiency is higher, and the heat generated by the battery cell 120 can be transferred to the adjacent plate body 131 faster.

[0043] As Figure 2 shown, the flexible heat-conducting layer 132 is provided with a hollowed-out portion 1321, so that the pressure acquisition device 141 passes through the corresponding hollowed-out portion 1321 and fits with the adjacent battery cell 120. When the battery cell 120 bulges, the expansion force generated by the bulge of the battery cell 120 is transmitted to the plate body 131 through the flexible heat-conducting layer 132, causing the plate body 131 to deform, and then transmitting the deformation extrusion force to the pressure acquisition device 141, and the collected pressure data is more accurate.

[0044] Preferably, the pressure acquisition device 141 has a first detection surface and a second detection surface that are opposite to each other along the length direction of the battery pack 100 and are used for detecting pressure changes. The first detection surface is attached to the first surface 1311 or the second surface 1312 of the plate body 131, and the second detection surface is attached to the largest side surface of the battery cell 120. The pressure acquisition device 141 has characteristics such as high sensitivity, fast response time, high detection limit, and strong stability, so that it can effectively sense the subtle deformations that occur between the adjacent plate body 131 and the battery cell 120.

[0045] Exemplarily, the plate body 131 can be a heat-conducting copper plate, and the heat-conducting copper plate has good heat-conducting performance. The heat generated by the battery cell 120 is transmitted to the heat-conducting copper plate through the flexible heat-conducting layer 132, and the heat-conducting copper plate can quickly export the heat generated by the battery cell 120, thereby greatly improving the self-cooling effect of the entire battery pack 100. Of course, the plate body 131 can also be other heat-conducting materials commonly used in the prior art, such as a heat-conducting aluminum plate, etc., as long as it can quickly export the heat generated by the battery cell 120.

[0046] Exemplarily, the flexible heat-conducting layer 132 can be a heat-conducting gasket, which has excellent heat-conducting performance and fitting ability, can effectively conduct the heat generated by the battery cell 120, and at the same time ensure the firm connection between the battery cell 120 and the board body 131, prevent the battery cell 120 from loosening or being damaged due to vibration or impact, and enhance the safety and reliability of the battery pack 100. Of course, the flexible heat-conducting layer 132 can also be other heat-conducting materials commonly used in the prior art, such as heat-conducting silicone grease, heat-conducting rubber, etc., as long as it can transfer the heat generated by the battery cell 120 to the board body 131.

[0047] As Figure 1 shown in the figure, the battery pack 100 further includes a prompting component 150 and a control component 160. Among them, the prompting component 150 is used to perform a prompting operation; the control component 160 is respectively connected to the prompting component 150 and the pressure acquisition device 141, and is used to control the prompting component 150 to perform a prompting operation when the pressure data acquired by the pressure acquisition device 141 is greater than or equal to a first set pressure. By obtaining the pressure data through the control component 160, it is convenient to detect the bulging condition of the battery pack 100 in real time, and a prompting signal is sent through the prompting component 150, which is convenient for timely replacement of the bulging battery pack 100.

[0048] As Figure 1 shown in the figure, the battery pack 100 includes a housing 110, a plurality of battery cells 120 are arranged at intervals in the housing 110 along the length direction of the battery pack 100, an acquisition component 140 is arranged in the housing 110, and a control component 160 is arranged outside the housing 110 and is communicatively connected to the acquisition component 140.

[0049] Exemplarily, the pressure acquisition device 141 can be a pressure sensor. When the battery cell 120 bulges, the expansion force generated by the bulge of the battery cell 120 is transmitted to the board body 131 through the flexible heat-conducting layer 132, causing the board body 131 to deform, and then transmitting the deformation extrusion force to the pressure sensor. The pressure sensor can sense the pressure and convert it into an available pressure output signal. The control component 160 is communicatively connected to a plurality of pressure sensors. The control component 160 samples and monitors the pressure applied by adjacent battery cells 120 to the heat-conducting partition 130 through the pressure sensors, and controls the prompting component 150 to perform a prompting operation according to the acquired pressure data, so as to remind the user to repair the battery pack 100 and make it safer when using the battery pack 100.

[0050] As Figures 1 to 3As shown, the acquisition component 140 further includes a temperature acquisition device 142 disposed on the heat conduction partition 130. The temperature acquisition device 142 is used to acquire the temperature of the heat conduction partition 130. The control component 160 is connected to the temperature acquisition device 142. The control component 160 is further configured to control the prompting component 150 to perform a prompting operation when the temperature data acquired by the temperature acquisition device 142 is greater than or equal to a first set temperature, so as to prevent the battery pack 100 from overheating and triggering thermal runaway, especially when the battery cell 120 overheats and causes it to bulge. By acquiring the temperature data through the control component 160, it is convenient to detect the temperature condition of the battery cell 120 in real time, and a prompting signal is sent through the prompting component 150, so as to facilitate the user to obtain the usage status of the battery pack 100 in a timely manner.

[0051] As Figure 1 and Figure 2 shown, at least two temperature acquisition devices 142 are respectively disposed on the first surface 1311 and the second surface 1312, pass through the corresponding hollow parts 1321 and are disposed opposite to the adjacent battery cells 120, and are used to acquire the temperature between the board body 131 and the adjacent battery cells 120, that is, to acquire the temperature of different surfaces of the board body 131 and / or the temperature of different positions on the same surface of the board body 131. The more the number of the temperature acquisition devices 142, the more accurate the temperature acquisition result.

[0052] Exemplarily, the temperature acquisition device 142 can be a temperature sensor. The temperature sensor can sense the temperature and convert it into an available temperature output signal. The control component 160 is communicatively connected to a plurality of temperature sensors. The control component 160 samples and monitors the temperature between the board body 131 and the adjacent battery cells 120 through the temperature sensors, and controls the prompting component 150 to perform a prompting operation according to the acquired temperature data, reminding the user to repair the battery pack 100, making it safer when using the battery pack 100.

[0053] As Figure 1 shown, the prompting component 150 is an alarm device that emits sound and / or photoelectric signals to prompt the user when the pressure data reaches a first set pressure and the temperature data reaches a first set temperature, facilitating the user to obtain the usage information of the battery pack 100 more intuitively and improving the usage safety of the battery pack 100.

[0054] As Figure 1 shown, the prompting component 150 includes a sound prompting member for emitting sound when the pressure data reaches a first set pressure and the temperature data reaches a first set temperature. Exemplarily, the sound prompting member can be a sound generator 151 disposed in the housing 110. The housing 110 is provided with a sound transmission hole 111 so that the alarm information emitted by the sound generator 151 can be received by the user through the sound transmission hole 111.

[0055] AsFigure 1 As shown, the prompt component 150 further includes a photoelectric prompt member for emitting a photoelectric signal when the pressure data reaches the first set pressure and the temperature data reaches the first set temperature. Exemplarily, the photoelectric prompt member can be an indicator light 152 provided outside the housing 110. The indicator light 152 can emit display lights of different colors to distinguish between battery bulge alarms and temperature alarms. In addition, to facilitate the user in obtaining the usage status of the battery pack 100, the indicator light 152 emits display lights of different colors and flashes accordingly.

[0056] As Figure 1 and Figure 3 shown, the battery pack 100 further includes a heat dissipation component 170 for performing heat dissipation operations on the heat conduction partition 130; the control component 160 is connected to the heat dissipation component 170, and the control component 160 is further configured to control the heat dissipation component 170 to perform heat dissipation operations when the temperature data collected by the temperature acquisition device 142 is greater than or equal to the second set temperature, where the second set temperature is less than the first set temperature. By providing the heat dissipation component 170, heat dissipation of the heat conduction partition 130 is achieved, that is, the temperature of the plurality of battery cells 120 is reduced, the aging of the battery cells 120 is slowed down, thereby extending the service life of the battery pack 100 and improving the working efficiency of the battery pack 100.

[0057] For the specific structure of the heat dissipation component 170, please refer to Figure 1 , which includes a water tank 171, a liquid cooling pipe 172, and a liquid cooling power source 173. Among them, the water tank 171 is used for storing, adding, or replacing the coolant; at least a part of the liquid cooling pipe 172 penetrates the heat conduction partition 130; the liquid cooling power source 173 and the water tank 171 are connected through the liquid cooling pipe 172 to form a heat dissipation loop. Through the cooperation of the cold power source, the liquid cooling pipe 172, the water tank 171, and the coolant, the heat dissipation efficiency of the battery pack 100 is improved.

[0058] As Figure 1 shown, a support column 180 is provided between the housing 110 and the water tank 171. At least two support columns 180 are spaced apart, and both ends of each support column 180 in the height direction of the battery pack 100 are fixedly connected to the housing 110 and the water tank 171 respectively, ensuring that the housing 110 and the water tank 171 are relatively arranged in the height direction of the battery pack 100.

[0059] As Figure 1 shown, the control component 160 is connected to the liquid cooling power source 173, and the control component 160 is further configured to control the liquid cooling power source 173 to push the coolant to circulate in the heat dissipation loop when the temperature data collected by the temperature acquisition device 142 is greater than or equal to the second set temperature, preventing the battery cells 120 from overheating and triggering thermal runaway, especially when the battery cells 120 overheat and cause bulging, delaying the service life of the battery cells 120 and ensuring the usage safety of the battery pack 100.

[0060] For the specific structure of the liquid cooling pipe 172, please refer to Figures 1 to 3 , which includes a first coil part 1721 and a second coil part 1722. Among them, the first coil part 1721 penetrates through the heat conduction partition 130, and the liquid inlet end of the first coil part 1721 is connected to the liquid cooling power source 173, that is, the first coil part 1721 penetrates through the plate body 131; both ends of the second coil part 1722 are respectively connected to the liquid outlet end of the first coil part 1721 and the water tank 171. The liquid cooling power source 173 pumps out the coolant in the water tank 171 and injects it into the first coil part 1721. When the coolant flows through the first coil part 1721, it takes away the heat of the multiple heat conduction partitions 130, thereby dissipating heat from the multiple battery cells 120. The heated coolant enters the second coil part 1722 and flows back into the water tank 171 through the second coil part 1722.

[0061] As Figure 1 shown, the heat dissipation assembly 170 further includes a heat exchange device 174. The heat dissipation assembly 170 is used to perform a heat dissipation operation on the second coil part 1722 to convert the high-temperature coolant into a normal-temperature coolant, which not only realizes the recycling of the coolant but also improves the heat dissipation efficiency of the battery pack 100.

[0062] As Figure 1 and Figure 3 shown, the first coil part 1721 includes a coil section 17211 and a U-shaped pipe section 17212 connected to the coil section 17211. Multiple coil sections 17211 are arranged at intervals along the length direction of the battery pack 100 and penetrate through the corresponding plate bodies 131. Multiple U-shaped pipe sections 17212 are arranged staggeredly along the width direction of the battery pack 100. Both ends of each U-shaped pipe section 17212 are respectively connected to two adjacent coil sections 17211. The coil section 17211 is a pipe fitting that winds back and forth along the width direction of the battery pack 100, and the flow directions of the coolant in two adjacent coil sections 17211 are opposite.

[0063] As Figure 1 shown, the second coil part 1722 is a pipe fitting that winds back and forth along the height direction of the battery pack 100. The second coil part 1722 has a large heat exchange area, which can ensure the heat exchange efficiency between the coolant and the heat exchange device 174, so that the high-temperature coolant can be quickly converted into a normal-temperature coolant.

[0064] For the specific structure of the heat exchange device 174, please refer to Figure 1, which includes heat dissipation fins 1741 and a heat dissipation fan 1742. Among them, the heat dissipation fins 1741 are arranged above the water tank 171, and at least part of the second coiled pipe portion 1722 penetrates through the heat dissipation fins 1741; the heat dissipation fan 1742, a plurality of heat dissipation fans 1742 are arranged at intervals on the heat dissipation fins 1741 and are arranged opposite to the second coiled pipe portion 1722. The heat of the second coiled pipe portion 1722 and the coolant inside it is conducted to the heat dissipation fins 1741, and the heat of the heat dissipation fins 1741 can be taken away by the airflow generated by the plurality of fans, so that the high-temperature coolant can be quickly converted into normal-temperature coolant and flow back into the water tank 171.

[0065] The control component 160 is a controller. As an embodiment not shown, a power manager is arranged on the housing 110. The power manager is electrically connected to the controller and a plurality of battery cells 120, and the current and voltage of the plurality of battery cells 120 can be monitored through the power manager.

[0066] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0067] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0069] In this application, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0070] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A battery pack, characterized in that: include: Battery cells, wherein a plurality of the battery cells are arranged at intervals along the length direction of the battery pack, and a heat-conducting partition is arranged between two adjacent battery cells; A collection component, the collection component at least includes a pressure collection device arranged between the battery cell and the adjacent heat-conducting partition, and is used to collect the pressure applied by the battery cell to the adjacent heat-conducting partition.

2. The battery pack according to claim 1, characterized in that: The heat conducting baffle comprises: A plate body, the plate body having a first surface and a second surface opposite to each other along the length direction, and at least two of the pressure collection devices are respectively arranged on the first surface and the second surface; Flexible heat-conductive layer, two of the flexible heat-conductive layers are respectively attached to the first surface and the second surface, and the flexible heat-conductive layer is provided with hollow parts, so that the pressure collection device passes through the corresponding hollow parts and fits with the adjacent battery cells.

3. The battery pack according to claim 2, characterized in that: The collection component also includes a temperature collection device, at least two of which are respectively arranged on the first surface and the second surface and pass through the corresponding hollow parts and are arranged opposite to the adjacent battery cells, for collecting the temperature between the board body and the adjacent battery cells.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The battery pack further comprises: A prompt component, used to perform prompt operations; A control component is connected to the prompt component and the pressure collection device respectively, and is used to control the prompt component to perform the prompt operation when the pressure data collected by the pressure collection device is greater than or equal to a first set pressure.

5. The battery pack according to claim 4, characterized in that: The collection component also includes a temperature collection device disposed on the heat-conducting baffle, and the temperature collection device is used to collect the temperature of the heat-conducting baffle; The control component is connected to the temperature acquisition device, and is also used to control the prompt component to perform the prompt operation when the temperature data collected by the temperature acquisition device is greater than or equal to the first set temperature.

6. The battery pack according to claim 5, characterized in that: The battery pack further comprises a heat dissipation assembly for performing heat dissipation operations on the thermally conductive partition; The control component is connected to the heat dissipation component, and is also used to control the heat dissipation component to perform the heat dissipation operation when the temperature data collected by the temperature collection device is greater than or equal to a second set temperature, wherein the second set temperature is lower than the first set temperature.

7. The battery pack according to claim 5, characterized in that: The prompt component is an alarm device that emits a sound and / or a photoelectric signal to prompt a user when the pressure data reaches the first set pressure and / or the temperature data reaches the first set temperature.

8. The battery pack according to claim 6, characterized in that: The heat dissipation component comprises: A water tank, used to store, add or replace coolant; A liquid cooling pipe, wherein at least a portion of the liquid cooling pipe passes through the heat conducting baffle; A liquid cooling power source, wherein the liquid cooling power source and the water tank are connected to form a heat dissipation circuit through the liquid cooling pipe. Wherein, the control component is connected to the liquid cooling power source, and is also used to control the liquid cooling power source to push the coolant to circulate in the heat dissipation circuit when the temperature data collected by the temperature collection device is greater than or equal to the second set temperature.

9. The battery pack according to claim 8, characterized in that: The liquid cooling tube comprises: A first coil part, wherein the heat-conducting baffle is passed through the first coil part, and a liquid inlet end of the first coil part is connected to the liquid-cooling power source; a second coil part, wherein two ends of the second coil part are respectively connected to the liquid outlet end of the first coil part and the water tank, Wherein, the heat dissipation component also includes a heat exchange device for performing a heat dissipation operation on the second coil part to convert the high-temperature coolant into the coolant at room temperature.

10. The battery pack according to claim 9, characterized in that: The heat exchange device comprises: A heat dissipation fin, wherein the heat dissipation fin is arranged above the water tank, and the second coil portion at least partially penetrates the heat dissipation fin; A plurality of cooling fans are arranged at intervals on the cooling fins and are arranged opposite to the second coil portion.

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