Battery pack shell and battery pack device

Abstract

The invention discloses a battery pack shell and a battery pack device, and relates to the technical field of battery pack devices. The battery pack shell comprises a shell body, a water cooling part, a heating part, a sensing part and a control part; the shell is provided with an opening to form an accommodating space in the opening, and the accommodating space is used for accommodating the battery pack; the water cooling part is arranged in the side wall, close to the opening, of the shell in a penetrating manner; the heating part is arranged on the side, away from the containing space, of the side wall. The sensing part is arranged in the accommodating space and is used for acquiring real-time temperature data of the battery pack in the accommodating space; the control part is in signal connection with the sensing part, the water cooling part and the heating part, and the control part controls the water cooling part or the heating part according to the real-time temperature data. The problems that in the prior art, the temperature adjusting effect on the battery pack is poor, the temperature consistency of modules and battery cells in the battery pack cannot be guaranteed, the performance is degraded, the service life is shortened, and the potential safety hazard of thermal runaway is caused are solved.

Description

Technical Field

[0001] The present application relates to the technical field of battery pack devices, and in particular to a battery pack housing and a battery pack device. Background Art

[0002] With the gradual development of the new energy industry, users are paying more and more attention to the user experience of battery packs in terms of service life, performance maintenance, temperature regulation, etc.

[0003] In the prior art, natural cooling or air cooling is usually used to achieve temperature regulation for battery packs, but the regulation effect is poor and the temperature consistency of the modules and cells inside the battery pack cannot be guaranteed, resulting in performance degradation, reduced service life, and the safety hazard of thermal runaway.

[0004] Therefore, the above problems need to be solved urgently. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a battery pack casing and a battery pack device to solve the problem that in the prior art, the battery pack is usually temperature regulated by natural cooling or air cooling, but the regulation effect is poor and the temperature consistency of the modules and cells inside the battery pack cannot be guaranteed, resulting in performance degradation, reduced service life, and the safety hazard of thermal runaway.

[0006] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0007] A first aspect of the present application provides a battery pack housing, comprising:

[0008] A housing having an opening to form a receiving space in the opening, wherein the receiving space is used to receive the battery pack;

[0009] A water cooling part, which is disposed in a side wall of the shell near the opening;

[0010] A heating part, which is arranged on a side of the side wall away from the accommodating space;

[0011] A sensor unit is disposed in the accommodation space and is used to obtain real-time temperature data of the battery pack in the accommodation space;

[0012] The control unit is connected with the sensing unit, the water cooling unit and the heating unit by signals, and controls the water cooling unit or the heating unit according to the real-time temperature data.

[0013] In some embodiments, the battery pack casing is made of silicon carbide.

[0014] In some embodiments, the aforementioned battery pack shell, wherein the water cooling part includes a water cooling channel, the two ends of the water cooling channel pass through the side walls and form a spaced water inlet and water outlet on the side of the side wall away from the space, the water cooling channel is coiled inside the side wall, the water inlet is used to connect to the water inlet pipe, and the water outlet is used to connect to the water outlet pipe.

[0015] In some embodiments, in the aforementioned battery pack shell, the water cooling channel includes a reduced diameter section, the inlet end of the reduced diameter section is connected to the water inlet, the outlet end of the reduced diameter section is away from the water inlet, and the tube diameter of the reduced diameter section decreases from the inlet end to the outlet end.

[0016] In some embodiments, in the aforementioned battery pack housing, the water cooling channel is in the shape of a long flat strip.

[0017] In some embodiments, the aforementioned battery pack shell has multiple water cooling channels, and the multiple water cooling channels are arranged in a disk spaced apart from each other in the side wall, and multiple water inlets and multiple water outlets are formed on the side of the side wall away from the accommodating space.

[0018] In some embodiments, in the aforementioned battery pack housing, the heating portion is circumferentially arranged on a side of the side wall away from the accommodating space.

[0019] In some embodiments, the aforementioned battery pack housing, wherein the control unit has a first temperature threshold and a second temperature threshold, and the first temperature threshold is greater than the second temperature threshold; wherein, when the real-time temperature data is greater than the first temperature threshold, the control unit sends a first signal to the water cooling unit to control the water cooling unit to cool the battery pack until the real-time temperature data is less than or equal to the first temperature threshold, and when the real-time temperature data is less than the second temperature threshold, the control unit sends a second signal to the heating unit to control the heating unit to heat the battery pack until the real-time temperature data is greater than or equal to the second temperature threshold.

[0020] In some embodiments, the aforementioned battery pack housing, wherein the control unit further has a third temperature threshold, the third temperature threshold is less than the first temperature threshold and greater than the second temperature threshold; wherein, when the real-time temperature data is greater than the first temperature threshold, the control unit sends a first signal to the water cooling unit to control the water cooling unit to cool the battery pack until the real-time temperature data is equal to the third temperature threshold, and when the real-time temperature data is less than the second temperature threshold, the control unit sends a second signal to the heating unit to control the heating unit to heat the battery pack until the real-time temperature data is equal to the third temperature threshold.

[0021] A second aspect of the present application provides a battery pack device, including a battery pack and the above-mentioned battery pack shell, wherein the battery pack is disposed in a containing space of the battery pack shell.

[0022] Through the above technical solution, the battery pack housing and battery pack device of the present application have at least the following advantages:

[0023] A first aspect of the present application provides a battery pack shell, comprising a shell, a water-cooling part, a heating part, a sensor part and a control part; the shell has an opening to form a accommodating space in the opening, and the accommodating space is used to accommodate the battery pack; the water-cooling part is penetrated through the side wall of the shell close to the opening; the heating part is arranged on the side of the side wall away from the accommodating space; the sensor part is arranged in the accommodating space, for obtaining real-time temperature data of the battery pack in the accommodating space; the control part is signal-connected with the sensor part, the water-cooling part and the heating part, and the control part controls the water-cooling part or the heating part according to the real-time temperature data. The present application realizes temperature regulation of the battery pack by simultaneously providing a water cooling part and a heating part for the shell, and the battery pack is arranged in an accommodation space surrounded by side walls in the shell opening. By arranging the water cooling part on the side wall of the shell, the larger area of ​​the side wall 13 compared with the bottom plate of the shell 1 provides a larger cooling area for the battery pack 4, thereby improving the coverage of the water cooling channel 21 for cooling the battery pack 4, and can evenly take away the heat generated by the battery pack, thereby ensuring the temperature consistency of the internal modules and cells of the battery pack at different positions. The heating part is arranged on the side of the side wall away from the accommodation space, which can avoid the safety hazard caused by the heating part directly contacting the battery pack for heating. Instead, the battery pack is evenly heated by the side wall of the shell as a heat conduction medium. The control part automatically adjusts the water cooling part and the heating part according to the real-time temperature data monitored by the sensor part, so that the battery pack works within an appropriate temperature range, which is conducive to exerting performance, reducing battery pack aging caused by excessively high or low temperature, and extending service life. At the same time, temperature control and regulation enhance the stability of the battery pack during operation, and avoid safety hazards such as thermal runaway. Through the application of the present application, the problem in the prior art that the temperature regulation effect of the battery pack is poor and the temperature consistency of the modules and cells inside the battery pack cannot be ensured, resulting in performance degradation, reduced service life, and the safety hazard of thermal runaway is solved.

[0024] The battery pack device provided in the second aspect of the present application has the same or similar technical effects as the battery pack shell provided in the first aspect of the present application.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1The isometric structure diagram of a battery pack housing provided in an embodiment of the present application is schematically shown;

[0028] Figure 2 A schematic diagram of a side wall cross-section of a battery pack housing provided in an embodiment of the present application is shown;

[0029] Figure 3 A schematic diagram of a side wall cross-section of another battery pack housing provided in an embodiment of the present application is shown;

[0030] Figure 4 A schematic diagram of the axonometric structure of another battery pack shell provided in an embodiment of the present application is shown schematically.

[0031] Description of reference numerals:

[0032] 1. Shell; 11. Opening; 12. Accommodating space; 13. Side wall;

[0033] 2. Water cooling part; 21. Water cooling channel; 22. Water inlet; 23. Water outlet; 211. Reduced diameter section; 2111. Inlet end; 2112. Outlet end;

[0034] 3. Heating unit;

[0035] 4. Battery pack. DETAILED DESCRIPTION

[0036] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0037] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specified, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as merely exemplary, rather than as limiting.

[0038] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0039] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0040] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a component connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific situation. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0041] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0042] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0043] The battery pack has a suitable operating temperature range during operation. The existing technology usually adopts natural cooling or air cooling to achieve temperature regulation of the battery pack. However, the inventor found that the existing method has poor temperature regulation effect on the battery pack, the temperature of the internal modules and cells of the battery pack cannot reach consistency, and it brings the safety hazard of thermal runaway. Therefore, a battery pack shell and a battery pack device were invented, which realize cooling and heating of the battery pack by setting a water cooling part and a heating part, and at the same time set a sensor part and a control part to achieve better automatic temperature regulation of the battery pack.

[0044] Embodiment 1

[0045] like Figure 1 and Figure 2As shown, the first aspect of the present application provides a battery pack housing, comprising a shell 1, a water cooling part 2, a heating part 3, a sensor part and a control part; the shell 1 has an opening 11 to form a accommodating space 12 in the opening 11, and the accommodating space 12 is used to accommodate the battery pack 4; the water cooling part 2 is penetrated through the side wall 13 of the shell 1 close to the opening 11; the heating part 3 is arranged on the side of the side wall 13 away from the accommodating space 12; the sensor part is arranged in the accommodating space 12, for obtaining real-time temperature data of the battery pack 4 in the accommodating space 12; the control part is signal-connected with the sensor part, the water cooling part 2 and the heating part 3, and the control part controls the water cooling part 2 or the heating part 3 according to the real-time temperature data.

[0046] Specifically, the present application arranges a shell 1 to accommodate the battery pack 4 through the accommodating space 12 formed in the opening 11 of the shell 1. The shell 1 can be rectangular, with four side walls 13 near the opening 11, and a rectangular accommodating space 12 is formed in the rectangular shell 1 to accommodate battery packs 4 of different sizes, specifications and quantities. The shell 1 can also be cylindrical, with annular side walls 13 near the opening 11, and a cylindrical accommodating space 12 is formed in the cylindrical shell 1. The structural form and size of the shell 1 are not specifically limited, and can be adjusted according to the different sizes, specifications, models and quantities of batteries accommodated.

[0047] The present application provides a water cooling part 2 that passes through the side wall 13 of the shell 1 near the opening 11, so that the heat generated by the battery pack 4 can be taken away by the flow of cooling water in the water cooling part 2. The water cooling part 2 passes through the side wall 13 of the shell 1 near the opening 11, so that the side wall 13 provides a larger cooling area for the battery pack 4 compared to the larger area of ​​the bottom plate of the shell 1, thereby improving the coverage of the water cooling channel 21 for cooling the battery pack 4, so that different positions of the battery pack 4 placed in the accommodating space 12 can obtain heat exchange cooling of the cooling water, thereby improving the temperature consistency of the internal modules and cells of the battery pack 4. The water-cooling part 2 can be a circular tubular pipe, or a flat water-cooling plate, a microchannel water-cooling plate, etc., without specific limitations. In addition, according to the required cooling effect and combined with the actual thickness of the side wall 13, the water-cooling part 2 can be set to a single layer, a multi-layer, etc., and the number of water-cooling parts 2 can also be adjusted, such as setting multiple circular tubular pipes, multiple flat water-cooling plates, multiple microchannel water-cooling plates, etc. The setting form of the water-cooling part 2 can also be adjusted, such as winding into different structural forms such as a bent shape, a serpentine shape, a U shape, etc., without specific limitations.

[0048] The present application arranges the heating part 3 on the side of the side wall 13 away from the accommodating space 12, which can avoid the safety hazard caused by the heating part 3 directly contacting the battery pack 4 for heating. Instead, the battery pack 4 is evenly heated by using the side wall 13 of the shell 1 as a heat conductive medium. The heating part 3 can be a heating resistance wire circumferentially wound around the circumferential side wall 13 of the shell 1, or a heating sheet or heating film with an embedded resistance heating layer. There is no specific limitation as long as the battery pack 4 can be evenly heated by using the side wall 13 of the shell 1 as a heat conductive medium.

[0049] In order to achieve automatic and precise temperature regulation of the battery pack 4, the battery pack shell of the present application is also provided with a sensing part, which can be a temperature sensor such as a thermocouple, thermistor, semiconductor, etc., which is arranged in the accommodating space 12 and is used to obtain real-time temperature data of the battery pack 4 in the accommodating space 12.

[0050] The control unit is connected with the sensing unit, the water cooling unit 2 and the heating unit 3 by signals. The control unit can be a microcontroller, a programmable logic controller, a single chip microcomputer, etc., without limitation. The control unit automatically adjusts the water cooling unit 2 and the heating unit 3 according to the real-time temperature data monitored by the sensing unit. The control unit can be provided with different thresholds or threshold ranges to accurately control the temperature of the battery pack 4 to be within a suitable threshold or threshold range, so that the battery pack 4 works at a suitable temperature, which is beneficial to the performance, reduces the aging of the battery pack 4 caused by excessively high or low temperature, and prolongs the service life. At the same time, the temperature control regulation enhances the stability of the battery pack 4 during operation and avoids safety hazards such as thermal runaway.

[0051] In a first aspect, the present application provides a battery pack housing, comprising a shell 1, a water-cooling part 2, a heating part 3, a sensor part and a control part; the shell 1 has an opening 11 to form a accommodating space 12 in the opening 11, and the accommodating space 12 is used to accommodate a battery pack 4; the water-cooling part 2 is penetrated through a side wall 13 of the shell 1 close to the opening 11; the heating part 3 is arranged on a side of the side wall 13 away from the accommodating space 12; the sensor part is arranged in the accommodating space 12, for obtaining real-time temperature data of the battery pack 4 in the accommodating space 12; the control part is signal-connected with the sensor part, the water-cooling part 2 and the heating part 3, and the control part controls the water-cooling part 2 or the heating part 3 according to the real-time temperature data. The present application realizes temperature regulation of the battery pack 4 by simultaneously providing a water cooling part 2 and a heating part 3 for the shell 1, and the battery pack 4 is arranged in a receiving space 12 surrounded by a side wall 13 in the opening 11 of the shell 1. By arranging the water cooling part 2 on the side wall 13 of the shell 1, a larger cooling area is provided for the battery pack 4 by the larger area of ​​the side wall 13 compared with the bottom plate of the shell 1, thereby increasing the coverage of the water cooling channel 21 for cooling the battery pack 4, and evenly taking away the heat generated by the battery pack 4, ensuring the temperature consistency of the internal modules and cells of the battery pack 4 at different positions, and the heating part 3 is provided On the side of the side wall 13 away from the accommodating space 12, the safety hazard caused by the heating part 3 directly contacting the battery pack 4 for heating can be avoided. Instead, the battery pack 4 is evenly heated by the side wall 13 of the shell 1 as a heat-conducting medium. The control part automatically adjusts the water cooling part 2 and the heating part 3 according to the real-time temperature data monitored by the sensor part, so that the battery pack 4 works within a suitable temperature range, which is conducive to performance, reduces the aging of the battery pack 4 caused by excessively high or low temperatures, and prolongs the service life. At the same time, the temperature control regulation enhances the stability of the battery pack 4 during operation and avoids safety hazards such as thermal runaway. Through the application of this application, the problem of poor temperature regulation effect of the battery pack 4 in the prior art, inability to ensure the temperature consistency of the modules and cells inside the battery pack 4, resulting in performance degradation, reduced service life, and safety hazards of thermal runaway is solved.

[0052] In some embodiments, the shell 1 is made of silicon carbide.

[0053] Specifically, in order to improve the temperature regulation effect of the battery pack 4 of the present application, the material of the shell 1 is set to silicon carbide. Silicon carbide has high thermal conductivity. When the battery pack 4 needs to be cooled, the heat generated by it can be quickly transferred to the water cooling channel 21 through the silicon carbide shell 1, thereby improving the heat dissipation efficiency. When the battery pack 4 needs to be heated, the heat generated by the heating part 3 on the side of the side wall 13 away from the accommodating space 12 is quickly transferred to the battery pack 4 through the silicon carbide shell 1, thereby improving the temperature regulation effect.

[0054] Silicon carbide also has high thermal stability, which enables the housing 1 to maintain stable performance even when the temperature changes during long-term use, thereby extending the service life of the battery pack 4. At the same time, due to the low expansion coefficient and high mechanical strength of silicon carbide, the silicon carbide housing 1 has very small dimensional changes when the temperature changes. The internal stress is reduced, and the high mechanical strength enables the housing 1 to withstand greater mechanical stress, protecting the safety of the battery pack 4 during the storage process.

[0055] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the water cooling part 2 includes a water cooling channel 21, and the two ends of the water cooling channel 21 pass through the side wall 13 and form a spaced water inlet 22 and a water outlet 23 on the side of the side wall 13 away from the space. The water cooling channel 21 is coiled in the side wall 13, and the water inlet 22 is used to connect to the water inlet pipe, and the water outlet 23 is used to connect to the water outlet pipe.

[0056] Specifically, in order to realize the cooling effect on the battery pack 4, the water cooling part 2 of the present application includes a water cooling channel 21, and the two ends of the water cooling channel 21 form a water inlet 22 and a water outlet 23 on the side wall 13, and the water cooling channel 21 is coiled inside the side wall 13. The setting position of the water cooling channel 21 in the present application fully utilizes the side wall 13 of the shell 1 surrounding the outside of the battery pack 4. Through the setting position of the water inlet 22 and the water outlet 23, and the preset path of the water cooling channel 21, it can cover the entire side wall 13 or part of the side wall 13 of the shell 1, and the specific details are not limited. At the same time, by winding the water cooling pipe inside the side wall 13, the space provided in the side wall 13 is further utilized to provide a larger cooling area, so that the heat generated by the battery pack 4 can be quickly and evenly transferred to the water cooling channel 21, avoiding the generation of temperature gradient inside the battery pack 4 and ensuring temperature consistency.

[0057] The water inlet 22 is connected to the water inlet pipe, and the water outlet 23 is connected to the water outlet pipe. The water inlet pipe and the water outlet pipe can be connected to the same cold source equipment to form a cooling cycle, or the water inlet pipe and the water outlet pipe can be connected to different equipment nodes respectively. There is no specific limitation, as long as it can ensure that the water cooling channel 21 in the side wall 13 provides a cooling medium to cool the battery pack 4 in the accommodating space 12.

[0058] like Figure 3 As shown, in some embodiments, the water cooling channel 21 includes a reduced diameter section 211, the inlet end 2111 of the reduced diameter section 211 is connected to the water inlet 22, the outlet end 2112 of the reduced diameter section 211 is away from the water inlet 22, and the pipe diameter of the reduced diameter section 211 decreases from the inlet end 2111 to the outlet end 2112.

[0059] Specifically, in order to further enhance the cooling effect of the water cooling unit 2 and improve the cooling efficiency, the present application provides a reduced diameter section 211 for the water cooling channel 21, the inlet end 2111 of the reduced diameter section 211 is connected to the water inlet 22, and the outlet end 2112 extends into the side wall 13 away from the water inlet 22, and the pipe diameter of the reduced diameter section 211 decreases along the direction from the inlet end 2111 to the outlet end 2112, so that the cooling water entering the water inlet 22 can increase the cooling water flow rate when passing through the reduced diameter section 211, improve the heat exchange efficiency between the cooling water and the battery pack 4 through the shell 1, and thus improve the cooling effect. And after increasing the flow rate, the cooling water of the water cooling channel 21 arranged in the side wall 13 can pass smoothly at its winding bend, avoiding turbulence or vortex phenomenon, while reducing water flow resistance and reducing the pressure requirement for external pumping of cooling water.

[0060] In some embodiments, the water cooling channel 21 is in the shape of a long flat strip.

[0061] Specifically, in order to efficiently utilize the space in the side wall 13 of the shell 1 close to the opening 11 to cool the battery pack 4, the present application sets the water cooling channel 21 in a long and flat strip shape, so as to utilize the spatial thickness of the side wall 13 to arrange the water cooling channel 21 with a sufficient area, so that the water cooling channel 21 can have a larger coverage area for the battery pack 4 under unit flow rate, so that heat can be evenly transferred and the cooling efficiency is improved. At the same time, the long and flat strip-shaped water cooling channel 21 can reduce the resistance of the medium flowing through it and reduce the pumping pressure required for the circulation of the medium in the water cooling channel 21. And in order to further increase the coverage area, the long and flat strip-shaped water cooling channel 21 can be coiled in the side wall 13 to improve space utilization.

[0062] In some embodiments, there are multiple water cooling channels 21 , which are arranged in a mutually spaced pattern in the side wall 13 , and form multiple spaced water inlets 22 and multiple water outlets 23 on a side of the side wall 13 away from the accommodating space 12 .

[0063] Specifically, in order to improve the cooling rate of the battery pack 4 and ensure the technical effect of uniform cooling, the present application is provided with a plurality of water cooling channels 21, which are arranged in a mutually spaced disk in the side wall 13, and form a plurality of spaced water inlets 22 and a plurality of water outlets 23 on the side of the side wall 13 away from the accommodating space 12. The plurality of water cooling channels 21 provide a larger cooling area, accelerate the heat transfer speed, and shorten the cooling time. At the same time, the larger cooling area enables the water cooling channel 21 to cover a larger area of ​​the battery pack 4 for heat exchange, effectively reducing the temperature gradient of the battery cells inside the battery pack 4, improving the temperature consistency, and enhancing the stability of the battery pack 4 during operation. The plurality of water inlets 22 and the plurality of water outlets 23 can be connected to the cold source equipment connected to the outside of the battery pack device through integrated pipeline components such as multi-way pipe fittings and water distributors, and are not limited to the specific ones, which can ensure that when the battery pack 4 needs to be cooled, cold water is supplied to the water cooling channel 21 through the plurality of water inlets 22, and a heat exchange cycle is formed through the plurality of water outlets 23.

[0064] like Figure 4 As shown, in some embodiments, the heating portion 3 is circumferentially arranged on a side of the side wall 13 away from the accommodating space 12 .

[0065] Specifically, the present application provides a heating unit 3 circumferentially arranged on the side of the side wall 13 away from the accommodating space 12, so that the heating unit 3 can provide a uniform heating effect on the circumferential side of the shell 1 of the battery pack shell, thereby reducing the temperature gradient inside the temperature pack and improving the temperature consistency. The heating unit 3 can be a heating resistance wire circumferentially arranged on the circumferential side wall 13 of the shell 1, or a heating sheet or heating film with an embedded resistance heating layer. The specific method is not limited, as long as the side wall 13 of the shell 1 is used as a heat conducting medium to uniformly heat the battery pack 4.

[0066] In some embodiments, the control unit has a first temperature threshold and a second temperature threshold, and the first temperature threshold is greater than the second temperature threshold; wherein, when the real-time temperature data is greater than the first temperature threshold, the control unit sends a first signal to the water cooling unit 2 to control the water cooling unit 2 to cool the battery pack 4 until the real-time temperature data is less than or equal to the first temperature threshold, and when the real-time temperature data is less than the second temperature threshold, the control unit sends a second signal to the heating unit 3 to control the heating unit 3 to heat the battery pack 4 until the real-time temperature data is greater than or equal to the second temperature threshold.

[0067] Specifically, in order to achieve stable regulation of the temperature of the battery pack 4, the control unit of the present application is provided with a first temperature threshold and a second temperature threshold. When the real-time temperature data is greater than the first temperature threshold, the monitoring unit determines that the battery pack 4 is at an excessively high operating temperature, which is not conducive to performance and brings safety hazards. The control unit sends a first signal to the water cooling unit 2 to control the water cooling unit 2 to cool the battery pack 4 until the real-time temperature data is less than or equal to the first temperature threshold, so as to avoid aging of the battery pack 4 caused by excessive temperature.

[0068] When the real-time temperature data is less than the second temperature threshold, the monitoring unit determines that the battery pack 4 is at an excessively low operating temperature, which is not conducive to performance. The control unit sends a second signal to the heating unit 3 to control the heating unit 3 to heat the battery pack 4 until the real-time temperature data is greater than or equal to the second temperature threshold, so as to avoid aging of the battery pack 4 caused by excessively low temperature.

[0069] The present application uses the control unit to automatically adjust the water cooling unit 2 and the heating unit 3 according to the real-time temperature data monitored by the sensor unit, so that the battery pack 4 operates within an appropriate temperature range, avoiding thermal runaway and low-temperature failure, and realizing accurate and timely automated temperature monitoring and management of the battery pack 4 temperature.

[0070] In some embodiments, the control unit also has a third temperature threshold, which is less than the first temperature threshold and greater than the second temperature threshold; wherein, when the real-time temperature data is greater than the first temperature threshold, the control unit sends a first signal to the water cooling unit 2 to control the water cooling unit 2 to cool the battery pack 4 until the real-time temperature data is equal to the third temperature threshold, and when the real-time temperature data is less than the second temperature threshold, the control unit sends a second signal to the heating unit 3 to control the heating unit 3 to heat the battery pack 4 until the real-time temperature data is equal to the third temperature threshold.

[0071] Specifically, in order to further achieve stable control of the temperature of the battery pack 4, the control unit of the present application also has a third temperature threshold, which is less than the first temperature threshold and greater than the second temperature threshold, serving as an intermediate value between the high temperature control threshold and the low temperature control threshold. The specific value of the third temperature threshold can be adaptively adjusted according to the most suitable operating temperature of battery packs 4 of different sizes and models.

[0072] When the real-time temperature data is greater than the first temperature threshold, the control unit sends a first signal to the water cooling unit 2 to control the water cooling unit 2 to cool the battery pack 4 until the real-time temperature data is equal to the third temperature threshold. When the real-time temperature data is less than the second temperature threshold, the control unit sends a second signal to the heating unit 3 to control the heating unit 3 to heat the battery pack 4 until the real-time temperature data is equal to the third temperature threshold. The increase of the third temperature threshold enables the present application to keep the battery pack 4 at a suitable temperature after the temperature of the battery pack 4 is regulated by the control unit, thereby improving performance and reducing energy loss. And because the third temperature threshold is the middle value of the temperature, after the temperature is adjusted, the sensing unit and the control unit can monitor the adjusted battery pack 4 and give the control reaction time required for the temperature change to ensure the stability and safety of the temperature control.

[0073] Embodiment 2

[0074] A second aspect of the present application provides a battery pack device, including a battery pack 4 and a battery pack shell, wherein the battery pack 4 is disposed in a receiving space 12 of the battery pack shell.

[0075] Specifically, please refer to Example 1 for the specific structure of the battery pack shell, which will not be repeated here. The second aspect of the present application provides a battery pack device, including a battery pack 4 and a battery pack shell, and the battery pack 4 is arranged in the accommodation space 12 of the battery pack shell. The battery pack shell includes a shell 1, a water cooling part 2, a heating part 3, a sensor part and a control part; the shell 1 has an opening 11 to form an accommodation space 12 in the opening 11, and the accommodation space 12 is used to accommodate the battery pack 4; the water cooling part 2 is penetrated in the side wall 13 of the shell 1 close to the opening 11; the heating part 3 is arranged on the side of the side wall 13 away from the accommodation space 12; the sensor part is arranged in the accommodation space 12, for obtaining real-time temperature data of the battery pack 4 in the accommodation space 12; the control part is connected to the sensor part, the water cooling part 2 and the heating part 3 by signal, and the control part controls the water cooling part 2 or the heating part 3 according to the real-time temperature data. The present application realizes temperature regulation of the battery pack 4 by simultaneously providing a water cooling part 2 and a heating part 3 for the shell 1, and the battery pack 4 is arranged in a receiving space 12 surrounded by a side wall 13 in the opening 11 of the shell 1. By arranging the water cooling part 2 on the side wall 13 of the shell 1, a larger cooling area is provided for the battery pack 4 by the larger area of ​​the side wall 13 compared with the bottom plate of the shell 1, thereby increasing the coverage of the water cooling channel 21 for cooling the battery pack 4, and evenly taking away the heat generated by the battery pack 4, ensuring the temperature consistency of the internal modules and cells of the battery pack 4 at different positions, and the heating part 3 is provided On the side of the side wall 13 away from the accommodating space 12, the safety hazard caused by the heating part 3 directly contacting the battery pack 4 for heating can be avoided. Instead, the battery pack 4 is evenly heated by the side wall 13 of the shell 1 as a heat-conducting medium. The control part automatically adjusts the water cooling part 2 and the heating part 3 according to the real-time temperature data monitored by the sensor part, so that the battery pack 4 works within a suitable temperature range, which is conducive to performance, reduces the aging of the battery pack 4 caused by excessively high or low temperatures, and prolongs the service life. At the same time, the temperature control regulation enhances the stability of the battery pack 4 during operation and avoids safety hazards such as thermal runaway. Through the application of this application, the problem of poor temperature regulation effect of the battery pack 4 in the prior art, inability to ensure the temperature consistency of the modules and cells inside the battery pack 4, resulting in performance degradation, reduced service life, and safety hazards of thermal runaway is solved.

[0076] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0077] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A battery pack housing, characterized in that: include: A housing (1), the housing (1) having an opening (11) to form a receiving space (12) in the opening (11), the receiving space (12) being used to receive a battery pack (4); A water cooling part (2), the water cooling part (2) being arranged in a side wall (13) of the shell (1) close to the opening (11); A heating portion (3), the heating portion (3) being arranged on a side of the side wall (13) facing away from the accommodating space (12); a sensor unit, the sensor unit being arranged in the accommodating space (12) and being used to obtain real-time temperature data of the battery pack (4) in the accommodating space (12); A control unit, wherein the control unit is signal-connected to the sensor unit, the water cooling unit (2) and the heating unit (3), and the control unit controls the water cooling unit (2) or the heating unit (3) according to the real-time temperature data.

2. The battery pack housing according to claim 1, characterized in that: The shell (1) is made of silicon carbide.

3. The battery pack housing according to claim 1, characterized in that: The water cooling part (2) comprises a water cooling channel (21), the two ends of the water cooling channel (21) pass through the side wall (13) and form a spaced water inlet (22) and a water outlet (23) on the side of the side wall (13) away from the space, the water cooling channel (21) is coiled inside the side wall (13), the water inlet (22) is used to connect to a water inlet pipe, and the water outlet (23) is used to connect to a water outlet pipe.

4. The battery pack housing according to claim 3, characterized in that: The water cooling channel (21) comprises a reduced diameter section (211), an inlet end (2111) of the reduced diameter section (211) is connected to the water inlet (22), an outlet end (2112) of the reduced diameter section (211) faces away from the water inlet (22), and a pipe diameter of the reduced diameter section (211) decreases in a direction from the inlet end (2111) to the outlet end (2112).

5. The battery pack housing according to claim 4, characterized in that: The water cooling channel (21) is in the shape of a long flat strip.

6. The battery pack housing according to any one of claims 3 to 5, characterized in that: There are a plurality of water cooling channels (21), and the plurality of water cooling channels (21) are arranged in a mutually spaced arrangement in the side wall (13), and a plurality of spaced water inlets (22) and a plurality of water outlets (23) are formed on a side of the side wall (13) away from the accommodating space (12).

7. The battery pack housing according to claim 1, characterized in that: The heating portion (3) is circumferentially arranged on a side of the side wall (13) facing away from the accommodating space (12).

8. The battery pack housing according to claim 1, characterized in that: The control unit has a first temperature threshold and a second temperature threshold, and the first temperature threshold is greater than the second temperature threshold; Wherein, when the real-time temperature data is greater than the first temperature threshold, the control unit sends a first signal to the water cooling unit (2) to control the water cooling unit (2) to cool the battery pack (4) until the real-time temperature data is less than or equal to the first temperature threshold; when the real-time temperature data is less than the second temperature threshold, the control unit sends a second signal to the heating unit (3) to control the heating unit (3) to heat the battery pack (4) until the real-time temperature data is greater than or equal to the second temperature threshold.

9. The battery pack casing according to claim 8, characterized in that: The control unit further has a third temperature threshold, which is smaller than the first temperature threshold and larger than the second temperature threshold; Wherein, when the real-time temperature data is greater than the first temperature threshold, the control unit sends a first signal to the water cooling unit (2) to control the water cooling unit (2) to cool the battery pack (4) until the real-time temperature data is equal to the third temperature threshold; when the real-time temperature data is less than the second temperature threshold, the control unit sends a second signal to the heating unit (3) to control the heating unit (3) to heat the battery pack (4) until the real-time temperature data is equal to the third temperature threshold.

10. A battery pack device, characterized in that: include: Battery pack (4); According to the battery pack shell according to any one of claims 1 to 9, the battery pack (4) is arranged in the accommodating space (12) of the battery pack shell.

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