Constant-temperature battery system and exercise bicycle

Abstract

The invention relates to the technical field of electric vehicles, and discloses a constant-temperature battery system and an exercise bicycle, the constant-temperature battery system comprises a tubular shell, a battery module, a heating piece, a protection circuit board and an end plate, the tubular shell is provided with a containing cavity, at least one end of the containing cavity is open, and the battery module is arranged in the containing cavity; the battery module comprises a plurality of battery cell units arranged in the length direction of the tubular shell and a battery support used for supporting the plurality of battery cell units, each battery cell unit comprises at least one cylindrical battery cell, the heating piece is installed on the tubular shell and used for heating the battery module, and the protection circuit board is installed in the containing cavity and electrically connected with the battery module and the heating piece. The end cover is used for sealing the open end of the containing cavity. The constant-temperature battery can ensure that the battery module is kept at a proper temperature in a low-temperature environment, ensures that the battery module can stably output power, and ensures that the endurance time of the exercise bicycle is long.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a constant temperature battery system and a sports fitness vehicle. Background Art

[0002] The field of sports fitness bikes combines traditional fitness equipment with modern technology, aiming to enhance the user's fitness experience and promote green travel. Some sports fitness models incorporate electric power assist technology, which can provide additional power support when the user pedals, making climbing or long-distance riding easier. Currently available sports fitness bikes usually thicken the downtube of the vehicle body and build the battery system into the downtube. The battery system usually includes multiple brackets and multiple batteries, and the multiple batteries are spliced ​​in sequence through multiple brackets along their length. In order to improve the user experience, the battery system of a sports fitness bike is usually a rechargeable battery. Since the use and storage environment of sports fitness bikes are usually outdoors, and sports fitness bikes are in a low temperature outdoor environment for a long time, on the one hand, the battery capacity will be reduced, resulting in a weakening of the battery power and a reduction in the battery life of the sports fitness bike. On the other hand, too low a temperature may cause battery failure, resulting in the phenomenon of battery failure. Summary of the invention

[0003] The first object of the present invention is to provide a constant temperature battery system, which can ensure that the battery module maintains a suitable temperature in a low temperature environment, ensure that the battery module can output power stably, and ensure the endurance of the sports fitness vehicle.

[0004] A second object of the present invention is to provide a sports fitness vehicle, which can keep the battery module at a suitable temperature in a relatively low temperature environment, thereby ensuring that the battery module can output power stably and guaranteeing the battery life of the sports fitness vehicle.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention discloses a constant temperature battery system, comprising: a tubular shell, the tubular shell having a accommodating cavity, at least one end of the accommodating cavity being open; a battery module, the battery module being arranged in the accommodating cavity; and comprising a plurality of battery cell units arranged along the length direction of the tubular shell and a battery bracket for supporting the plurality of battery cell units, each of the battery cell units comprising at least one cylindrical battery cell; a heating element, the heating element being mounted on the tubular shell and extending along the length of the tubular shell to heat the battery module; a protection circuit board, the protection circuit board being mounted in the accommodating cavity and being electrically connected to the battery module and the heating element, the protection circuit board being capable of detecting the temperature of the battery module and controlling the heating power of the heating element; and an end cover, the end cover being used to seal the open end of the accommodating cavity.

[0007] In some embodiments, there are multiple battery holders, each of which is provided with at least one placement position for accommodating the cylindrical battery cell; wherein: each of the battery cell units is provided with the battery holders at both ends along the length direction of the tubular shell.

[0008] In some specific embodiments, among the two battery holders adjacent to each other along the length direction of the tubular housing, one of the battery holders is provided with a plug-in column, and the other battery holder is provided with a plug-in hole, and the plug-in column can be fitted into the plug-in hole.

[0009] In some specific embodiments, two adjacent battery holders along the length direction of the tubular shell are connected by a connecting column so that the two battery holders are spaced apart and a spray hole is provided on each placement position; the battery module also includes an explosion-proof component clamped between two adjacent battery holders, and the explosion-proof component can block the two correspondingly arranged spray holes to prevent the substances generated by thermal runaway of the cylindrical battery cell from erupting along the length direction of the tubular shell.

[0010] In some more specific embodiments, the explosion-proof component includes two connecting tiles and explosion-proof tiles. The explosion-proof tiles are connected at the junction of the two connecting tiles and are used to block the two correspondingly arranged injection holes. The sides of the two connecting tiles facing away from each other are respectively connected to the two battery holders, and each connecting tile is provided with an exhaust hole.

[0011] In some embodiments, a limit strip is provided on the inner wall or the outer wall of the tubular shell along its length, and two limit strips are respectively stopped at two sides of the heating element.

[0012] In some embodiments, both ends of the accommodating cavity are open, and the end cover includes a top cover and a bottom cover, the top cover is connected to the protection circuit board; and a safety valve is provided on the bottom cover.

[0013] In some specific embodiments, the battery holder is provided with a wire clip, which is used to clamp the wires of the battery cell unit, the top cover is provided with a main wire slot, which is used to lead out the lead wires of the protection circuit board, and the top cover is also provided with a charging and discharging interface.

[0014] In some embodiments, the constant temperature battery system further includes a heat sink connected to an outer side wall of the tubular housing.

[0015] The present invention also discloses a sports fitness vehicle, comprising a vehicle body and the constant temperature battery system mentioned above, wherein the constant temperature battery system is installed inside the vehicle body.

[0016] The beneficial effects of the constant temperature battery system of the present invention are as follows: since the battery module includes a plurality of battery cells arranged along the length direction of the tubular shell, and each battery cell includes at least one cylindrical battery cell, the length of the entire battery module is relatively long, but the overall width is small, and it can be well applied to existing sports and fitness vehicles when used in conjunction with the tubular shell. Since a heating element and a protective circuit board are provided on the shell, the structure of the protective circuit board has the functions of overcharge protection, over-discharge protection, overcurrent protection and short-circuit protection, which ensures the safety of the battery module during the charging and discharging process, and can also monitor the voltage and current of the battery module. In the actual working process, the use of the heating element can ensure that the battery module is always at a more suitable temperature, ensure that the battery module can stably output power, and ensure the endurance of the sports and fitness vehicle.

[0017] The beneficial effect of the sports fitness vehicle of the present invention is that due to the constant temperature battery system described above, the sports fitness vehicle can keep the battery module at a suitable temperature in a low temperature environment, ensuring that the battery module can output power stably and guaranteeing the endurance of the sports fitness vehicle.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural schematic diagram of a constant temperature battery system according to a first embodiment of the present invention;

[0020] Figure 2 is a partial structural schematic diagram of a constant temperature battery system according to Embodiment 1 of the present invention;

[0021] Figure 3 is an exploded schematic diagram of a constant temperature battery system according to a first embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the splicing structure of two battery brackets in embodiment 1 of the present invention;

[0023] Figure 5 is an exploded schematic diagram of two battery brackets of the first embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the matching structure of two battery brackets and explosion-proof parts in the second embodiment of the present invention;

[0025] Figure 7 is a schematic diagram of the splicing structure of two battery brackets in the second embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the explosion-proof component of the second embodiment of the present invention.

[0027] Reference numerals:

[0028] 100, tubular housing; 110, limiting strip;

[0029] 200, battery module; 210, battery cell unit; 220, battery bracket; 221, placement position; 2221, limiting convex edge; 222, injection hole; 223, plug-in column; 224, plug-in hole; 225, line clamp; 2251, first elastic arm; 2252, second elastic arm; 226, line clamping space; 227, limiting block; 230, connecting column; 240, explosion-proof part; 241, connecting tile; 2411, annular part; 2412, cone part; 24121, exhaust hole; 242, explosion-proof tile;

[0030] 300, heating element;

[0031] 400, protect circuit board;

[0032] 500, top cover; 510, main line slot; 520, charging and discharging interface; 530, cable clamping hole;

[0033] 600. Bottom cover; 700. Heat sink. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] Embodiment 1:

[0039] The present invention discloses a constant temperature battery system, referring to Figure 1 and Figure 2 As shown, the constant temperature battery system of this embodiment includes a tubular shell 100, a battery module 200, a heating element 300, a protection circuit board 400 and an end plate. The tubular shell 100 has a accommodating cavity, at least one end of which is open, and the battery module 200 is arranged in the accommodating cavity; and includes a plurality of battery cell units 210 arranged along the length direction of the tubular shell 100 and a battery holder 220 for supporting the plurality of battery cell units 210, each battery cell unit 210 includes at least one cylindrical battery cell, the heating element 300 is installed on the tubular shell 100, and is extended along the length of the tubular shell 100 to heat the battery module 200, the protection circuit board 400 is installed in the accommodating cavity, and is electrically connected to the battery module 200 and the heating element 300, the protection circuit board 400 can detect the temperature of the battery module 200 and control the heating power of the heating element 300, and the end cover is used to seal the open end of the accommodating cavity. It is understandable that, since the battery module 200 includes a plurality of battery cells 210 arranged along the length direction of the tubular housing 100, and each battery cell 210 includes at least one cylindrical battery cell, the length of the entire battery module 200 is relatively long, but the overall width is small, and it can be well applied to existing sports fitness bikes when used with the tubular housing 100. Since a heating element 300 and a protective circuit board 400 are provided on the housing, the structure of the protective circuit board 400 mainly includes a control integrated circuit, a power MOS tube, a sampling resistor, a charge / discharge control circuit, a fuse, and a temperature sensor. It has overcharge protection, over-discharge protection, overcurrent protection, and short circuit protection to ensure the safety of the battery module 200 during the charging and discharging process. It can also be responsible for monitoring the voltage and current of the battery module 200. The MOS tube controls the on and off of the circuit according to the instructions. The sampling resistor is used for current detection. The fuse provides additional safety protection. The temperature sensor can monitor the temperature of the battery module 200. In the actual working process, it is used in conjunction with the heating element 300 to ensure that the battery module 200 is always at a more suitable temperature to ensure that the battery module 200 can output power stably and ensure the endurance of the sports fitness vehicle.

[0040] refer to Figure 4 As shown, there are multiple battery holders 220, each of which is provided with at least one placement position 221, and the placement position 221 is used to accommodate cylindrical batteries, and each battery unit 210 is provided with a battery holder 220 at both ends along the length direction of the tubular housing 100. It can be understood that since the constant temperature battery system disclosed in this embodiment is used for a sports fitness bike, and since the inner diameter of the vehicle tube on the body of the sports fitness bike is limited, each battery unit 210 of this embodiment is provided with a battery holder 220 at both ends along the length direction of the tubular housing 100, so that while ensuring the stable splicing of multiple battery units 210, the width of the entire battery module 200 will not be increased, which is conducive to using the constant temperature battery system of this embodiment in a sports fitness bike. In this embodiment, the number of battery units 210 is five, each battery holder 220 has four placement positions 221, the number of battery holders 220 is ten, and each battery unit 210 is provided with a battery holder 220 at both ends. Of course, in other embodiments of the present invention, the number of the battery cell unit 210, the battery holder 220 and the cylindrical battery cells on each battery cell unit 210 can be selected according to actual needs and is not limited to the number in this embodiment.

[0041] Optionally, the placement position 221 is formed as a through hole, and a limiting convex edge 2221 for supporting the cylindrical battery cell is provided on the hole wall. It is understandable that in the actual assembly process, the cylindrical battery cell is inserted into the through hole, and then stopped on the limiting convex edge 2221 to complete the assembly of the cylindrical battery cell and the battery holder 220, which is very convenient to assemble and can improve the stability of the cylindrical battery cell.

[0042] Optionally, of the two battery holders 220 adjacent to each other along the length direction of the tubular housing 100, one battery holder 220 is provided with a plug-in column 223, and the other battery holder 220 is provided with a plug-in hole 224, and the plug-in column 223 can be fitted in the plug-in hole 224. It is understandable that in the actual assembly process, the two battery holders 220 are respectively installed at both ends of the battery cell unit 210 to assemble a unit body, and multiple unit bodies can be connected as a whole through the matching of the plug-in hole 224 and the plug-in column 223, thereby completing the assembly of the entire battery module 200. This connection method simplifies the connection between multiple battery cell units 210 on the one hand, facilitating assembly, and on the other hand, it can ensure the connection stability between multiple battery cell units 210, thereby conveniently installing the entire battery module 200 into the tubular housing 100.

[0043] refer to Figure 2As shown, a limit strip 110 is provided on the inner side wall or the outer side wall of the tubular housing 100 along its length, and the two limit strips 110 are respectively stopped at the two sides of the heating element 300. It can be understood that in this embodiment, the heating element 300 can be provided on the inner side wall or the outer side wall of the tubular housing 100, and the limit strip 110 can limit the heating element 300 to avoid unnecessary displacement, thereby ensuring that the heating element 300 can stably heat the battery module 200. In order to improve the heating efficiency and connection stability of the heating element 300, the heating element 300 can also be bonded to the inner side wall or the outer side wall of the tubular housing 100 by a thermal conductive adhesive.

[0044] refer to Figure 1 As shown, both ends of the accommodating cavity are open, and the end covers include a top cover 500 and a bottom cover 600, wherein the top cover 500 is connected to the protective circuit board 400; and a safety valve is provided on the bottom cover 600. It is understandable that the bottom cover 600 is provided with a safety valve, and when the internal pressure of the tubular housing 100 reaches a predetermined threshold, the safety valve will automatically open to release excess gas, and then automatically reset or remain open to avoid further pressure accumulation.

[0045] The battery holder 220 is provided with a wire clip 225, which is used to clamp the wires of the battery cell unit 210. The top cover 500 is provided with a main wire slot 510, which is used to lead out the lead wires of the protection circuit board 400. The top cover 500 is also provided with a charge and discharge interface 520 and a wire clamping hole 530. It can be understood that the battery holder 220 is provided with a wire clip 225, which is used to clamp the wires of the battery cell unit 210. The wire clip 225 can fix the wires of the battery cell unit 210 at a fixed position of the tubular housing 100, thereby avoiding malfunctions caused by the confusion of the internal wiring of the tubular housing 100. The main wire slot 510 facilitates the lead-out of the lead wires of the protection circuit board 400, thereby facilitating the constant temperature battery system as a power source to be connected to the electrical devices that need electric energy of the sports fitness vehicle. The charge and discharge structure facilitates the charging and discharging of the battery module 200, thereby improving user satisfaction. When the heating element 300 is installed on the outer wall of the tubular housing 100 , a wire clamping hole 530 is provided on the top cover 500 to facilitate the lead wires of the heating element 300 to be introduced into the installation cavity, so as to facilitate the connection between the heating element 300 and the protection circuit board 400 .

[0046] Optional, such as Figure 5As shown, the wire clamp 225 includes a first elastic arm 2251 and a second elastic arm 2252 arranged on the outer wall of the battery holder 220, and at least one of the first elastic arm 2251 and the second elastic arm 2252 is an elastic hook: the first elastic arm 2251, the second elastic arm 2252, and the outer wall of the battery holder 220 together form a wire clamping space 226 for clamping the wire. It can be understood that in the actual working process, it is only necessary to clamp the wire 225 into the wire clamping space 226, and the first elastic arm 2251 and the second elastic arm 2252 can automatically rebound after the wire clamping is completed, so that the wire can be constrained in the wire clamping space 226, thereby ensuring that the wire remains in a fixed position, avoiding the phenomenon of the wire being entangled or damaged by foreign objects, which is conducive to improving the working reliability of the battery module 200.

[0047] refer to Figure 1 As shown, the constant temperature battery system further includes a heat sink 700, which is connected to the outer wall of the tubular housing 100. It is understandable that in the actual working process, the battery module 200 will generate heat when working normally, and the additional heat sink 700 can quickly dissipate the heat of the battery module 200 to the vehicle body, thereby preventing the constant temperature battery system from overheating.

[0048] Embodiment 2:

[0049] The constant temperature battery system of this embodiment is basically the same as that of the first embodiment, except that the structure of the battery bracket 220 of this embodiment is different.

[0050] refer to Figure 6 and Figure 7 As shown, two battery holders 220 adjacent to each other along the length direction of the tubular housing 100 are connected by a connecting column 230, so that the two battery holders 220 are arranged at intervals, and the placement position 221 is formed as a limit groove, and a spray hole 222 is provided on the bottom wall of the limit groove; the battery module 200 also includes an explosion-proof member 240 sandwiched between two adjacent battery holders 220, and the explosion-proof member 240 can block the two correspondingly arranged spray holes 222 to prevent the substances generated by the thermal runaway of the cylindrical battery cell from being ejected along the length direction of the tubular housing 100. It can be understood that when one of the cylindrical batteries has a thermal runaway, the substances generated by the thermal runaway are blocked by the explosion-proof member 240 after passing through the spray hole 222 to avoid affecting other cylindrical batteries. Therefore, the explosion-proof member 240 can prevent the substances ejected by the thermal runaway of the cylindrical battery cell from affecting other intact cylindrical batteries along the length direction of the cylindrical battery cell, which is conducive to improving the safety performance of the battery module 200.

[0051] Optionally, two battery holders 220 and connecting posts 230 adjacent to each other along the length direction of the tubular housing 100 are integrally formed. Thus, the two battery holders 220 and connecting posts 230 are an integral structure, which is convenient for processing and assembly. Of course, in other embodiments of the present invention, the two battery holders 220 and connecting posts 230 may also be split structures, and the two battery holders 220 and connecting posts 230 may be connected by plugging, snap connection, connector connection, etc.

[0052] Furthermore, if Figure 8 As shown, the explosion-proof component 240 includes two connecting tiles 241 and an explosion-proof tile 242. The explosion-proof tile 242 is connected to the junction of the two connecting tiles 241 and is used to block two correspondingly arranged injection holes 222. The two connecting tiles 241 are connected to the two battery holders 220 on one side away from each other, and each connecting tile 241 is provided with an exhaust hole 24121. It can be understood that by connecting the connecting tile 241 with the two battery holders 220, it is possible to ensure that the explosion-proof component 240 is stably installed between the two battery holders 220. In the actual working process, the material ejected by the thermal runaway of the cylindrical battery cell can be blocked by the explosion-proof tile 242 after passing through the injection hole 222. After being blocked, it can diffuse along the radial direction of the explosion-proof tile 242 and finally be discharged from the exhaust hole 24121 on the connecting tile 241, thereby preventing the material ejected by the thermal runaway of the battery from affecting other intact cylindrical batteries along the length direction of the cylindrical battery cell, which is beneficial to improving the safety performance of the battery module 200. It should be supplemented that, in the embodiment of the present invention, the connecting tile 241 and the explosion-proof tile 242 are both made of high temperature resistant and corrosion resistant materials, such as ceramics, so as to improve the explosion-proof performance.

[0053] Optionally, there are multiple exhaust holes 24121, and the multiple exhaust holes 24121 are arranged at intervals along the circumference of the explosion-proof tile 242. It can be understood that in the actual working process, the material ejected by the thermal runaway of the cylindrical battery cell can be blocked by the explosion-proof tile 242 after passing through the injection hole 222, and after being blocked, it can diffuse along the radial direction of the explosion-proof tile 242 and then be discharged from the multiple exhaust holes 24121. The multiple exhaust holes 24121 are conducive to improving the discharge speed of the material ejected by the thermal runaway of the cylindrical battery cell, thereby reducing the impact of the thermal runaway of the cylindrical battery cell, and helping to extend the service life of the cylindrical battery cell module. It should be supplemented that, in the embodiment of the present invention, the exhaust holes 24121 can be round holes, square holes or holes of other shapes, and the shape, number and arrangement of the exhaust holes 24121 can be selected according to actual needs.

[0054] Optionally, each connection tile 241 includes a connected annular portion 2411 and a conical portion 2412, the annular portion 2411 is connected to the large end of the conical portion 2412, the small ends of the conical portions 2412 of the two connection tiles 241 are connected, and the explosion-proof tile 242 is located at the connection of the small ends of the two conical portions 2412. It can be understood that the annular portion 2411 can ensure the connection stability between the connection tile 241 and the battery holder 220, thereby ensuring the connection stability between the explosion-proof component 240 and the battery holder 220, and the conical portion 2412 can guide the substances generated by the thermal runaway of the cylindrical battery cell, so that they are discharged more smoothly from the exhaust hole 24121, thereby ensuring the explosion-proof effect of the explosion-proof component 240.

[0055] Optionally, a limit block 227 is provided on the battery holder 220, and the limit block 227 can stop against the outer peripheral wall of the annular portion 2411. Since the two ends of the explosion-proof component 240 stop against the two battery holders 220 respectively, the limit block 227 is provided on the battery holder 220 to prevent the explosion-proof component 240 from coming out from between the two battery holders 220, and there is no need to connect the explosion-proof component 240 with the battery holder 220 in the form of a snap-on structure or a connector, which simplifies the connection form of the explosion-proof component 240 and the battery holder 220, and facilitates the installation and removal of the explosion-proof component 240. Further, there are multiple limit blocks 227, and multiple limit blocks 227 are arranged at intervals along the circumference of the explosion-proof component 240. Multiple limit blocks 227 can enhance the limiting effect on the explosion-proof component 240, thereby further preventing the explosion-proof component 240 from coming out of the battery holder 220. It should be supplemented that the shape and number of the limit blocks 227 can be selected according to actual needs. It should be additionally explained here that the annular portion 2411 can also be connected to the battery holder 220 by bonding, snap connection or connector connection, and is not limited to the limiting connection method of the above-mentioned limiting block 227.

[0056] It should be additionally explained that, in other embodiments of the present invention, the explosion-proof component 240 can be formed as a complete component, each explosion-proof component 240 includes multiple explosion-proof units, each explosion-proof unit is used to block two correspondingly arranged injection holes 222, and is not limited to the solution of independently setting multiple explosion-proof components 240 in this embodiment.

[0057] Embodiment three:

[0058] The present invention also discloses a sports fitness vehicle, comprising a vehicle body and the above-mentioned constant temperature battery system, wherein the constant temperature battery system is installed inside the vehicle body. Due to the above-mentioned constant temperature battery system, the sports fitness vehicle can keep the battery module 200 at a suitable temperature in a low temperature environment, ensure that the battery module 200 can output power stably, and ensure the endurance of the sports fitness vehicle.

[0059] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A constant temperature battery system, It is characterized in that include: A tubular housing (100), the tubular housing (100) having a receiving cavity, at least one end of the receiving cavity being open; A battery module (200), the battery module (200) being arranged in the accommodating cavity; and comprising a plurality of battery cell units (210) arranged along the length direction of the tubular housing (100) and a battery support (220) for supporting the plurality of battery cell units (210), each of the battery cell units (210) comprising at least one cylindrical battery cell; a heating element (300), the heating element (300) being mounted on the tubular housing (100) and extending along the length of the tubular housing (100) to heat the battery module (200); a protective circuit board (400), the protective circuit board (400) being installed in the accommodating cavity and being electrically connected to the battery module (200) and the heating element (300), the protective circuit board (400) being capable of detecting the temperature of the battery module (200) and controlling the heating power of the heating element (300); An end cover is used to seal the open end of the accommodating cavity.

2. The constant temperature battery system according to claim 1, It is characterized in that There are a plurality of battery supports (220), each of which is provided with at least one placement position (221), and the placement position (221) is used to accommodate the cylindrical battery cell; wherein: each of the battery cell units (210) is provided with the battery supports (220) at both ends along the length direction of the tubular housing (100).

3. The constant temperature battery system according to claim 2, It is characterized in that Of the two battery supports (220) adjacent to each other along the length direction of the tubular housing (100), one battery support (220) is provided with a plug-in column (223), and the other battery support (220) is provided with a plug-in hole (224), and the plug-in column (223) can be fitted into the plug-in hole (224).

4. The constant temperature battery system according to claim 3, It is characterized in that Two battery supports (220) adjacent to each other along the length direction of the tubular housing (100) are connected via a connecting column (230) so that the two battery supports (220) are arranged at intervals, and each placement position (221) is provided with a spray hole (222); the battery module (200) further comprises an explosion-proof component (240) sandwiched between the two adjacent battery supports (220), the explosion-proof component (240) being capable of blocking the two correspondingly arranged spray holes (222) to prevent substances generated by thermal runaway of the cylindrical battery cell from spraying along the length direction of the tubular housing (100).

5. The constant temperature battery system according to claim 4, It is characterized in that The explosion-proof component (240) comprises two connecting tiles (241) and an explosion-proof tile (242); the explosion-proof tile (242) is connected to the junction of the two connecting tiles (241) and is used to block the two correspondingly arranged injection holes (222); the two connecting tiles (241) are respectively connected to the two battery brackets (220) on one side facing away from the other; and each connecting tile (241) is provided with an exhaust hole (24121).

6. The constant temperature battery system according to claim 1, It is characterized in that A limit strip (110) is provided on the inner wall or the outer wall of the tubular housing (100) along its length, and the two limit strips (110) are respectively stopped at two sides of the heating element (300).

7. The constant temperature battery system according to claim 1, It is characterized in that Both ends of the accommodating cavity are open, and the end covers include a top cover (500) and a bottom cover (600). The top cover (500) is connected to the protective circuit board (400); and a safety valve is provided on the bottom cover (600).

8. The constant temperature battery system according to claim 7, It is characterized in that The battery support (220) is provided with a wire clip (225), the wire clip (225) is used to clip the wire of the battery cell unit (210), the top cover (500) is provided with a main wire slot (510), the main wire slot (510) is used to lead out the lead wire of the protection circuit board (400), and the top cover (500) is also provided with a charge and discharge interface (520).

9. The constant temperature battery system according to claim 1, It is characterized in that The constant temperature battery system further comprises a heat sink (700), wherein the heat sink (700) is connected to the outer side wall of the tubular housing (100).

10. A sports fitness bike, It is characterized in that It comprises a vehicle body and the constant temperature battery system according to any one of claims 1 to 9, wherein the constant temperature battery system is installed inside the vehicle body.

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