Sodium electric parking power supply

Abstract

The utility model belongs to the technical field of batteries, particularly relates to a sodium electric parking power supply, and solves the problems that the sodium electric parking power supply cannot achieve expected performance in a low-temperature environment, so that stable parking cannot be realized, and a heater is inconvenient to disassemble and assemble. The sodium-ion parking power supply comprises a battery box and a sodium-ion battery cell arranged in the battery box, a heating module is arranged between the sodium-ion battery cell and the battery box, and the heating module is electrically connected to the positive electrode and the negative electrode of the sodium-ion battery cell through a control circuit and is powered by the sodium-ion battery cell. A temperature measuring module is further arranged between the sodium ion battery cell and the battery box, the temperature measuring module is electrically connected to the control circuit, and a heater of the heating module is detachably fixed between the sodium ion battery cell and the battery box. The high low-temperature environment adaptability is achieved through heating of the heating module, parking stability is guaranteed, the heater is detachably arranged, and the effect of being convenient to assemble and disassemble is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a sodium-electric parking power supply. Background Art

[0002] With the rapid development of the automobile industry, some cars and other motor vehicles are parked through electronic brakes, which requires the participation of parking power supplies to provide electrical energy. Sodium-ion batteries are increasingly used in parking power supplies due to their low material cost.

[0003] However, in low-temperature usage scenarios such as winter, especially in northern winter, such batteries still have performance problems below the expected level and cannot guarantee stable parking. Most battery systems are not equipped with corresponding heating modules, which makes them unable to be used normally in low-temperature environments; although some battery systems are also equipped with heating modules, their heaters are mostly sheet-shaped and directly attached to the battery cells. In this way, there is a certain inconvenience in the disassembly and assembly of the heater, and it is not convenient to replace or remove the heater. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a sodium electric parking power supply which has strong adaptability to low temperature environments and convenient heater disassembly and assembly.

[0005] In order to achieve the purpose of the innovative utility model, the following technical solutions can be used:

[0006] A sodium-electric parking power supply comprises a battery box and a sodium-ion battery cell arranged in the battery box, a heating module is arranged between the sodium-ion battery cell and the battery box, the heating module is electrically connected to the positive and negative electrodes of the sodium-ion battery cell through a control circuit and is powered by the sodium-ion battery cell, a temperature measuring module is also arranged between the sodium-ion battery cell and the battery box, the temperature measuring module is electrically connected to the control circuit, and a heater of the heating module is detachably fixed between the sodium-ion battery cell and the battery box.

[0007] The utility model sodium electric parking power supply can be used to meet the parking power demand of various vehicles. A heating module is provided between the sodium ion battery cell and the battery box to increase the temperature of the sodium ion battery cell, so as to ensure that the sodium ion battery cell can still be used normally in low temperature environments such as winter in the north, and has excellent low temperature adaptability, so as to ensure the stability and reliability of parking; the temperature measurement module is used to detect the temperature of the sodium ion battery cell, and transmit the temperature data to the control circuit to participate in the judgment of the circuit on and off, which can avoid the safety problems caused by excessive temperature on the one hand, and on the other hand, it also ensures that the heating module can be started in time when it needs to work under the preset low temperature conditions, so as to ensure that the power supply is in a normal state when needed; the specific heater is detachably fixedly installed in the battery box, which is convenient for the early assembly and subsequent replacement and maintenance, and is convenient for replacing heaters of different types and powers according to the specific use scene, and even in the south or summer, when some scenes that do not need heating are used, the heater can be easily removed, and the safety problems such as short circuits that may be caused by the heater are completely avoided, and the operation is flexible. Of course, although the voltage level of the sodium electric parking power supply is low in a low temperature environment, for the heating module, the voltage level is sufficient to realize the corresponding function. The battery box is a box structure with a cover, which is common knowledge and will not be elaborated in detail.

[0008] In the above-mentioned sodium-electric parking power supply, the control circuit includes a temperature-controlled switch component and a relay switch component connected in series between the sodium-ion battery cell and the heating module; the temperature-controlled switch component is electrically connected to the control circuit; the relay switch component is connected to the switch circuit and is controlled on and off by the switch circuit.

[0009] The temperature control switch assembly and the relay switch assembly are used to realize the on-off control of the control circuit, and the circuit is connected when both are closed, wherein the temperature control switch assembly is closed when the temperature is lower than the preset value, and the relay switch assembly is controlled to open and close by the switch circuit, and the switch circuit can control the relay switch assembly according to signals such as the car being put into the parking gear. The specific structures and connection details of the temperature control switch assembly, the relay switch assembly, the control circuit and the switch circuit are common knowledge and will not be further elaborated here.

[0010] As an optimization, a protection element is also connected to the sodium ion battery cell. The protection element includes a fuse connected in series in the circuit, which is used to disconnect the circuit in time when the current in the circuit is abnormally too large, as a backup safety guarantee.

[0011] In the above-mentioned sodium-electric parking power supply, the temperature measuring module includes a temperature measuring probe, and at least one temperature measuring groove is respectively provided on the inner bottom surface and the inner side surface of the heating box of the heating module, and the temperature measuring probe is provided in the temperature measuring groove; one end of the temperature measuring groove is connected to a wiring groove, and the wiring groove is provided on the inner bottom surface and the inner side surface of the heating box, and the outlet at the outer end thereof is connected to the outside world from the upper opening of the heating box; the temperature measuring probe is connected to a connecting wire, and the connecting wire is arranged in the wiring groove, and passes through the outlet to be electrically connected to the control circuit.

[0012] A temperature measuring groove is provided on the bottom and side of the heating box, and the groove faces inward. The temperature measuring probe is arranged in the temperature measuring groove, which is used to monitor the temperature state of the sodium ion battery cell from the bottom and side in multiple directions, which is conducive to timely grasping the real state of the sodium ion battery cell; a wiring groove is provided in the heating box, and the temperature measuring groove and the wiring groove are connected. The connecting wire connected to the temperature measuring probe passes through the temperature measuring groove through the wiring groove and finally is pulled out from the outlet. The connecting wire is connected to the control circuit to realize power supply and temperature data transmission between them; the temperature measuring groove and the wiring groove are both in the form of inwardly concave grooves to prevent the temperature measuring probe and the connecting wire from being squeezed between the sodium ion battery cell and the heating box.

[0013] As an optimization, the shape of the temperature measuring tank is adapted to the shape of the temperature measuring probe, which avoids excessive unnecessary displacement of the temperature measuring probe in the temperature measuring tank. At the same time, the shape of the temperature measuring tank is as small as possible, which also reduces the impact on the structural strength of the heating box to a certain extent.

[0014] As an optimization, the temperature probe is also fixed to the upper end surface of the sodium ion battery cell by adhesive tape, and the temperature probe is also electrically connected to the control circuit through a connecting wire.

[0015] A temperature probe is also provided on the upper end surface of the sodium ion battery cell, which is used to monitor the temperature state of the sodium ion battery cell from the upper end, so as to more accurately grasp the temperature state of the sodium ion battery cell. The connection between the temperature probe and the sodium ion battery cell is achieved by tape bonding. On the basis of meeting the connection effect standards, it has the advantages of low connection cost and easy disassembly and assembly.

[0016] As an optimization, the temperature measuring groove and the wiring groove are covered with waterproof tape, and the waterproof tape is bonded to the inner side and inner bottom surface of the heating box.

[0017] Waterproof tape is used to seal the temperature measuring tank and wiring trough to avoid the problem of condensed water entering when the temperature difference changes, thus extending the service life. Moreover, this sealing method is low-cost and easy to implement and remove.

[0018] In the above-mentioned sodium-electric parking power supply, the heating module includes a heating box fixed in the battery box and open at the top, and a battery storage cavity for installing sodium-ion batteries is formed in the heating box; a first heating component of the heater is provided between the inner wall of the heating box and the sodium-ion batteries; when the sodium-ion batteries are arranged in multiple groups, a second heating component of the heater is also provided between adjacent sodium-ion batteries.

[0019] The sodium ion battery cells are placed in a battery cell storage cavity in a heating box, and a first heating component is arranged between the side wall of the heating box and the sodium ion battery cells, so as to heat the sodium ion battery cells from the side. In specific implementation, according to specific voltage requirements, multiple groups of sodium ion battery cells may be arranged in series or in parallel, and these sodium ion battery cells are arranged in the battery cell storage cavity, and a second heating component is arranged between the connected sodium ion battery cells to ensure that each side of each sodium ion battery cell can be effectively heated, and the heating effect is more comprehensive.

[0020] In the above-mentioned sodium-electric parking power supply, a partition is vertically fixed in the heating box, and the partition is arranged parallel to the inner wall of the heating box with a space between them, forming a sheet-shaped first installation position, and the first installation position accommodates the first heating component, and the inner wall of the partition is in contact with or almost in contact with the side wall of the sodium-ion battery cell.

[0021] A partition is provided on the inner side of the heating box, and a first installation position is separated from the side of the heating box by the partition. The installation position is in the shape of a sheet and has a thickness only sufficient to accommodate the first heating component. The first heating component is placed in the first installation position. The partition separates the first installation position from the sodium ion battery cell, thereby avoiding the squeezing of the first heating component by the sodium ion battery cell and providing a basis for the selection of the category of the first heating component. The distance between the inner wall of the partition and the side wall of the sodium ion battery cell is very small, thereby improving the heating efficiency of the first heating component for the sodium ion battery cell.

[0022] In the above-mentioned sodium-electric parking power supply, the partition is evenly and densely distributed with first heat transfer holes that are arranged through the thickness direction, and a limiting structure for limiting and fixing the sodium-ion battery cell is provided between the first heat transfer hole and the sodium-ion battery cell; the limiting structure includes a limiting bolt that is tightly fitted and inserted in the first heat transfer hole or engaged in the first heat transfer hole through a threaded structure, and the limiting section of the limiting bolt is against the upper end surface of the sodium-ion battery cell; the first connecting section of the limiting bolt passes through the first heat transfer hole and is laterally inserted into the first installation position, and the first heating component is limited below the first connecting section.

[0023] The first heat transfer holes are densely distributed on the partition, so that the sodium ion battery cell and the first heating component are connected, which facilitates the heat generated by the first heating component to be directly transferred to the sodium ion battery cell, thereby improving the heating efficiency. As another function, the first heat transfer hole can also be used to set a limit bolt, which is inserted into the first heat transfer hole, and its limit section is horizontally placed above the sodium ion battery cell, which is used to apply a vertical limit fixing effect to the sodium ion battery cell, so as to fix the sodium ion battery cell in the heating box; the limit bolt can be detachably connected to the first heat transfer hole by tight fitting or screw connection, which is convenient for disassembly and assembly; moreover, the first heat transfer holes are densely distributed on the partition, and the setting position and setting quantity of the limit bolt can be flexibly adjusted, so as to fix sodium ion batteries of different sizes. In addition, the front end of the first connecting section of the limiting bolt is inserted into the first installation position, which is equivalent to being placed horizontally above the first heating component. It also has a limiting function for the first heating component to prevent it from falling out of the first installation position. The limit can be formed and released by adjusting the insertion depth of the limiting bolt, and the operation is flexible.

[0024] As an optimization, at least one axially arranged limiting plane is provided on the limiting section, the limiting plane is parallel to the upper end surface of the sodium ion battery cell, an elastic cushion layer is provided between the limiting plane and the upper end surface of the sodium ion battery cell, and the elastic cushion layer is in a compressed state.

[0025] In order to compensate for the possible large or small distance between the limiting section and the upper end surface of the sodium ion battery cell, an elastic cushion layer is provided between the limiting section and the sodium ion battery cell. The elastic cushion layer can also prevent the limiting section from causing possible pressure damage to the upper end surface of the sodium ion battery cell. Even a limiting plane is provided on the limiting section to further increase the force-bearing area between them.

[0026] As an optimization, the temperature measuring groove on the inner side of the heating box is located between the first heat transfer holes, which prevents the heat generated by the first heating component from being directly applied to the temperature measuring probe through the first heat transfer holes, thereby improving the accuracy of temperature detection.

[0027] In the above-mentioned sodium-electric parking power supply, the sodium-ion battery cells are provided in multiple groups, a frame-shaped intermediate plate is provided between adjacent sodium-ion battery cells, a vertically arranged sheet-shaped second installation position is formed in the intermediate plate, the second installation position accommodates the second heating component, the intermediate plate is densely covered with second heat transfer holes arranged through the thickness direction, and a fixing structure for fixing the intermediate plate is provided between the second heat transfer holes and the sodium-ion battery cells.

[0028] Multiple groups of sodium ion battery cells are separated by an intermediate plate. The interior of the intermediate plate is hollow, forming a second mounting position similar to the first mounting position. A second heating component is arranged in the second mounting position for heating the sodium ion battery cells on both sides of the intermediate plate. In order to improve the heating efficiency, a second heat transfer hole is also arranged on the intermediate plate. The width of the intermediate plate is adapted to the width of the battery cell storage cavity. The intermediate plate is just stuck in the battery cell storage cavity, and the fixing structure is used to realize the fixed installation of the fixing plate.

[0029] In the above-mentioned sodium-electric parking power supply, the fixing structure includes a fixing bolt which is tightly inserted into or engaged in the second heat transfer hole through a threaded structure, the second connecting section of the fixing bolt passes through the second heat transfer hole and is laterally inserted into the second mounting position, and the second heating component is limited below the second connecting section; the fixing section of the fixing bolt includes at least one axially extending bonding plane, and the bonding plane is bonded and fixed to the upper end surface of the sodium-ion battery cell through a double-sided adhesive strip.

[0030] Similar to the limiting bolt, the fixing bolt can be detachably connected to the second heat transfer hole, the second connecting section is inserted into the second mounting position to limit the second heating component, and a bonding plane is provided on the fixing section, which is parallel to the upper end surface of the sodium ion battery cell, and a double-sided adhesive strip is arranged between the two planes to realize the bonding and fixation between the middle plate and the sodium ion battery cell, with a simple structure, easy disassembly and assembly, and low installation cost.

[0031] As an optimization, the aperture of the first heat transfer hole is consistent with the aperture of the second heat transfer hole. Correspondingly, the first connecting section and the second connecting section of the fixing bolt and the limiting bolt are adapted to each other in size. In fact, the fixing bolt and the limiting bolt can actually be exactly the same part, which reduces processing costs and is more flexible in use.

[0032] In the above-mentioned sodium-electric parking power supply, at least one drainage groove is arranged on the inner bottom surface of the heating box, and the drainage groove runs through the bottom of the battery cell storage cavity, the first installation position where the first heating component is located, and the second installation position where the second heating component is located, and is connected to the outside of the heating box.

[0033] The drainage groove is arranged at the bottom of the heating box, and is connected to the battery cell storage cavity, the first installation position and the second installation position at the same time, and the outer end is connected to the outside of the heating box, which is used to drain the condensed water generated by the temperature difference in the heating box.

[0034] As an optimization, the temperature measuring groove and wiring groove on the bottom surface of the heating box are located between the two drainage grooves and are not connected to the drainage groove. The wiring groove and drainage groove are both linear, and the wiring groove and the temperature measuring groove are located between the drainage grooves but are not connected, which prevents the water in the drainage groove from entering the wiring groove and the temperature measuring groove, affecting the service life of the temperature measuring probe and the connecting wire.

[0035] As an optimization, the temperature measuring grooves are evenly arranged along the length direction of the wiring groove. According to the specific sodium-ion battery cell model, the temperature measuring probe can be selected and set in the corresponding temperature measuring groove to ensure that the temperature data at the bottom of each sodium-ion battery cell is detected, which has strong flexibility.

[0036] In the above-mentioned sodium-electric parking power supply, a heat-insulating layer is fixed on the outer wall of the heating box; the heater includes a PTC heating element and / or a metal wire heating film and / or a heating tube with a heat-conducting liquid flowing therein.

[0037] The insulation layer is used to insulate the heating box and improve the heating efficiency in the heating box. Since the heater can be detachably placed in the corresponding installation position of the heating box, as long as the size is within the size of the installation position, the heater can be selected in different types according to the specific usage scenario and other requirements. Specifically, it can be one or more heating elements such as PTC heating elements, metal wire heating films, and heating tubes with thermal fluid flowing. Among them, the PTC heating element, metal wire heating film, and heating tubes with thermal fluid flowing are common knowledge and will not be further expanded. It should be understood that the heating tube is connected to a thermal fluid circulation structure and a thermal fluid heating structure.

[0038] Compared with the prior art, the utility model mainly has the following advantages:

[0039] 1. The sodium-electric parking power supply can be used to meet the parking power requirements of various vehicles. A heating module is provided between the sodium-ion battery cell and the battery box to increase the temperature of the sodium-ion battery cell, ensuring that the sodium-ion battery cell can still be used normally in low-temperature environments such as winter in the north. It has excellent low-temperature adaptability and ensures stable and reliable parking. The temperature measurement module is used to detect the temperature of the sodium-ion battery cell and transmit the temperature data to the control circuit to participate in the judgment of circuit on and off. On the one hand, it can avoid safety problems caused by excessive temperature. On the other hand, it also ensures that the heating module can be started in time when it needs to work under preset low-temperature conditions to ensure that the power supply is in a normal state when needed. The specific heater is detachably fixed in the battery box, which facilitates the early assembly and subsequent replacement and maintenance, and is convenient for replacing heaters of different types and powers according to specific usage scenarios. Even when used in some scenarios where heating is not required, such as in the south or summer, the heater can be easily removed to completely avoid safety problems such as short circuits that may be caused by the heater, and the operation is flexible.

[0040] 2. The temperature probe is arranged in the temperature measuring tank, and is used to monitor the temperature state of the sodium ion battery cell from the bottom and the side in multiple directions, which is conducive to timely grasping the real state of the sodium ion battery cell; a wiring groove is arranged in the heating box, and the temperature measuring tank and the wiring groove are connected. The connecting wire connected to the temperature probe passes through the wiring groove from the temperature measuring tank and finally is pulled out from the outlet. The connecting wire is connected to the control circuit to realize the power supply and temperature data transmission between them; the temperature measuring tank and the wiring groove are both in the form of inwardly concave grooves to prevent the temperature probe and the connecting wire from being squeezed between the sodium ion battery cell and the heating box.

[0041] 3. A partition is provided on the inner side of the heating box, and a first installation position is separated from the side of the heating box by the partition. The first heating component is placed in the first installation position. The partition separates the first installation position and the sodium ion battery cell, thereby avoiding the squeezing of the sodium ion battery cell on the first heating component and providing a basis for the category selection of the first heating component.

[0042] 4. The first heat transfer holes are densely distributed on the partition, so that the sodium ion battery cell and the first heating component are connected, which facilitates the heat generated by the first heating component to be directly transferred to the sodium ion battery cell, thereby improving the heating efficiency. As another function, the first heat transfer hole can also be used to set a limit bolt, which is inserted into the first heat transfer hole, and its limit section is horizontally placed above the sodium ion battery cell, which is used to apply a vertical limit fixing effect to the sodium ion battery cell, thereby fixing the sodium ion battery cell in the heating box; the limit bolt can be detachably connected to the first heat transfer hole by tight fitting or screw connection, which is convenient for disassembly and assembly; moreover, the first heat transfer holes are densely distributed on the partition, and the setting position and setting quantity of the limit bolt can be flexibly adjusted, so as to fix sodium ion batteries of different sizes. In addition, the front end of the first connecting section of the limiting bolt is inserted into the first installation position, which is equivalent to being placed horizontally above the first heating component. It also has a limiting function for the first heating component to prevent it from falling out of the first installation position. The limit can be formed and released by adjusting the insertion depth of the limiting bolt, and the operation is flexible.

[0043] 5. Multiple groups of sodium ion battery cells are separated by an intermediate plate. The interior of the intermediate plate is hollow, forming a second installation position similar to the first installation position. A second heating component is arranged in the second installation position for heating the sodium ion battery cells on both sides of the intermediate plate. In order to improve the heating efficiency, a second heat transfer hole is also arranged on the intermediate plate. The width of the intermediate plate is adapted to the width of the battery cell storage cavity. The intermediate plate is just stuck in the battery cell storage cavity, and the fixing structure is used to realize the fixed installation of the fixing plate.

[0044] 6. The fixing bolt is detachably connected to the second heat transfer hole, and the second connecting section is inserted into the second mounting position to limit the second heating component. A bonding plane is provided on the fixing section, and the bonding plane is parallel to the upper end surface of the sodium ion battery cell. A double-sided adhesive strip is provided between the two planes to achieve bonding and fixing between the middle plate and the sodium ion battery cell. The structure is simple, disassembly and assembly are convenient, and the setting cost is low.

[0045] 7. The drainage trough is set at the bottom of the heating box to drain the condensed water generated by temperature difference in the heating box. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall structure provided by the utility model;

[0047] Figure 2 It is a circuit schematic diagram provided by the utility model;

[0048] Figure 3 It is a schematic diagram of the structure inside the battery box provided by the utility model (the battery box cover is hidden);

[0049] Figure 4 It is a top view schematic diagram of the internal structure of the battery box provided by the utility model (the battery box cover is hidden);

[0050] Figure 5 It is a structural schematic diagram of the heating box provided by the utility model;

[0051] Figure 6 It is a top view schematic diagram of the heating box provided by the utility model;

[0052] Figure 7 It is a structural schematic diagram of the intermediate plate provided by the utility model;

[0053] Figure 8 It is a schematic diagram of the structure of the limit bolt and the fixed bolt provided by the utility model;

[0054] Fig. 9 yes Figure 4 A magnified detail of the center point A;

[0055] Fig.10 yes Figure 5 Enlarged detail of point B in the middle.

[0056] In the figure, a battery box 1, a sodium ion battery cell 2, a heating module 3, a heating box 31, a battery cell storage cavity 32, a first heating component 33, a second heating component 34, a partition 35, a first mounting position 36, a first heat transfer hole 37, a limiting bolt 38, a limiting section 39, a first connecting section 40, a limiting plane 41, an intermediate plate 42, a second mounting position 43, a second heat transfer hole 44, a fixing bolt 45, a second connecting section 46, a fixing section 47, a bonding plane 48, a drainage groove 49, an insulation layer 50, a temperature measuring module 6, a temperature measuring probe 61, a temperature measuring groove 62, a wiring groove 63, a line outlet 64, a control circuit 7, a temperature control switch assembly 71, a relay switch assembly 72, a fuse 73, and a switch circuit 74. DETAILED DESCRIPTION

[0057] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0058] Specific implementation examples Figure 1-10 As shown, the sodium-electric parking power supply comprises a battery box 1 and a sodium-ion battery cell 2 arranged in the battery box 1, a heating module 3 is provided between the sodium-ion battery cell 2 and the battery box 1, the heating module 3 is electrically connected to the positive and negative electrodes of the sodium-ion battery cell 2 through a control circuit 7 and is powered by the sodium-ion battery cell 2, a temperature measuring module 6 is also provided between the sodium-ion battery cell 2 and the battery box 1, the temperature measuring module 6 is electrically connected to the control circuit 7, and the heater of the heating module 3 is detachably fixed between the sodium-ion battery cell 2 and the battery box 1.

[0059] Specifically, the sodium-electric parking power supply of the utility model can be used to meet the parking power requirements of various vehicles. A heating module 3 is provided between the sodium-ion battery cell 2 and the battery box 1, which is used to increase the temperature of the sodium-ion battery cell 2 to ensure that the sodium-ion battery cell 2 can still be used normally in a low-temperature environment such as in the north in winter. It has excellent low-temperature adaptability and ensures stable parking under low-temperature conditions; the temperature measuring module 6 is used to detect the temperature of the sodium-ion battery cell 2 and transmit the temperature data to the control circuit 7 to participate in the judgment of circuit on and off. On the one hand, it can avoid safety problems caused by excessive temperature, and on the other hand, it also ensures that the heating module 3 can be started in time when it needs to work under preset low-temperature conditions to ensure that the battery is in a normal state when needed; the specific heater is detachably fixedly installed in the battery box 1, which facilitates the early assembly and subsequent replacement and maintenance, and is convenient for replacing heaters of different types and powers according to specific usage scenarios. Even when used in some scenarios such as the south or summer where heating is not required, the heater can be easily removed to completely avoid safety problems such as short circuits that may be caused by the heater, and the operation is flexible.

[0060] like Figure 2As shown, the control circuit 7 includes a temperature control switch component 71 and a relay switch component 72 connected in series between the sodium ion battery cell 2 and the heating module 3; the temperature control switch component 71 is electrically connected to the control circuit 7; the relay switch component 72 is connected to the switch circuit 74, and the switch circuit 74 controls the on and off.

[0061] Specifically, the temperature control switch assembly 71 and the relay switch assembly 72 are used to realize the on-off control of the control circuit 7, and the circuit is connected when both are closed, wherein the temperature control switch assembly 71 is closed when the temperature is lower than the preset value, and the relay switch assembly 72 is controlled to open and close by the switch circuit 74, and the switch circuit 74 can control the switch of the relay switch assembly 72 according to signals such as the car being put into the parking gear. A protection element is also connected to the sodium ion battery cell 2, and the protection element includes a fuse 73 connected in series in the circuit, which is used to disconnect the circuit in time when the current in the circuit is abnormally too large, as a backup safety guarantee.

[0062] like Figure 3-6 As shown in Figures 9 and 10, the temperature measuring module 6 includes a temperature measuring probe 61. A plurality of temperature measuring grooves 62 are respectively provided on the inner bottom surface and the inner side surface of the heating box 31 of the heating module 3. The temperature measuring grooves 62 are provided with temperature measuring probes 61. One end of the temperature measuring grooves 62 is connected to a wiring groove 63. The wiring grooves 63 are provided on the inner bottom surface and the inner side surface of the heating box 31, and the outlet 64 at the outer end thereof is connected to the outside world from the upper opening of the heating box 31. The temperature measuring probe 61 is connected with a connecting wire, which is arranged in the wiring groove 63 and passes through the outlet 64 to be electrically connected to the control circuit 7. The shape of the temperature measuring grooves 62 is adapted to the shape of the temperature measuring probe 61. The upper end surface of the sodium ion battery cell is also fixed with a temperature measuring probe 61 by adhesive tape. The temperature measuring probe 61 is electrically connected to the control circuit 7 through a connecting wire.

[0063] Specifically, a temperature measuring groove 62 is provided on the bottom and side of the heating box 31, and the groove faces the inside. The temperature measuring probe 61 is arranged in the temperature measuring groove 62, which is used to monitor the temperature state of the sodium ion battery cell 2 from the bottom and side in all directions, which is conducive to timely grasping the real state of the sodium ion battery cell 2; a wiring groove 63 is provided in the heating box 31, and the temperature measuring groove 62 is connected to the wiring groove 63, and the connecting wire connected to the temperature measuring probe 61 is finally pulled out from the outlet 64 through the temperature measuring groove 62 through the wiring groove 63, and the connecting wire is connected to the control circuit 7 to realize the power supply and temperature data transmission between them; the temperature measuring groove 62 and the wiring groove 63 are both in the form of inwardly concave grooves, so as to avoid the temperature measuring probe 61 and the connecting wire being squeezed between the sodium ion battery cell 2 and the heating box 31. The temperature measuring groove 62 is slightly larger than the temperature measuring probe 61, which avoids the temperature measuring probe 61 from being excessively and unnecessarily offset in the temperature measuring groove 62, and the shape of the temperature measuring groove 62 is as small as possible, which also reduces the influence on the structural strength of the heating box 31 to a certain extent. A temperature probe 61 is also provided on the upper end surface of the sodium ion battery cell 2, which is used to monitor the temperature state of the sodium ion battery cell 2 from the upper end, so as to more accurately grasp the temperature state of the sodium ion battery cell 2. The connection between the temperature probe 61 and the sodium ion battery cell 2 is achieved by adhesive tape bonding. On the basis of meeting the connection effect, it has the advantages of low connection cost and easy disassembly and assembly.

[0064] As an optimization of this embodiment, the temperature measuring groove 62 and the wiring groove 63 are covered with waterproof tape, and the waterproof tape is bonded to the inner side surface and the inner bottom surface of the heating box 31.

[0065] Specifically, the waterproof tape seals the temperature measuring groove 62 and the wiring groove 63, which can avoid the problem of condensed water entering when the temperature difference changes, prolong the service life, and the sealing method is low-cost and easy to implement and remove.

[0066] like Figure 3 , 4 As shown in Figures 9, the heating module 3 includes a heating box 31 which is fixed in the battery box 1 and has an open upper opening, and a cell storage cavity 32 for installing the sodium ion battery cell 2 is formed in the heating box 31; a first heating component 33 of a heater is provided between the inner wall of the heating box 31 and the sodium ion battery cell 2; the sodium ion battery cells 2 are arranged in multiple groups, and a second heating component 34 of a heater is also provided between adjacent sodium ion battery cells 2.

[0067] Specifically, the sodium ion battery cells 2 are placed in the battery cell storage cavity 32 in the heating box 31, and the first heating component 33 is arranged between the side wall of the heating box 31 and the sodium ion battery cells 2, and is used to heat the sodium ion battery cells 2 from the side; the sodium ion battery cells 2 are arranged in multiple groups, and these sodium ion battery cells 2 are arranged in the battery cell storage cavity 32, and the second heating component 34 is arranged between the connected sodium ion battery cells 2, to ensure that each side of each sodium ion battery cell 2 can be effectively heated, and the heating effect is more comprehensive.

[0068] like Figure 3 , 4 As shown in Figures 7, 8 and 9, a partition 35 is vertically fixed in the heating box 31. The partition 35 is arranged parallel to the inner wall of the heating box 31 and spaced apart. A sheet-shaped first installation position 36 is formed between the partition 35 and the first installation position 36 contains the first heating component 33. The inner wall of the partition 35 and the side wall of the sodium ion battery 2 are in contact or almost in contact. The partition 35 is evenly and densely covered with first heat transfer holes 37 that are arranged through the thickness direction. A limiting structure for limiting and fixing the sodium ion battery 2 is provided between the first heat transfer hole 37 and the sodium ion battery 2; the limiting structure includes a limiting bolt 38 that is engaged in the first heat transfer hole 37 through a threaded structure, and the limiting section 39 of the limiting bolt 38 is against the upper end surface of the sodium ion battery 2; the first connecting section 40 of the limiting bolt 38 passes through the first heat transfer hole 37 and is laterally inserted into the first installation position 36, and the first heating component 33 is limited below the first connecting section 40. The limiting section 39 is provided with two axially parallel limiting planes 41 , which are parallel to the upper end surface of the sodium ion battery cell 2 , and an elastic cushion layer is provided between the limiting plane 41 and the upper end surface of the sodium ion battery cell 2 , and the elastic cushion layer is in a compressed state.

[0069] Specifically, a partition 35 is provided on the inner side of the heating box 31, and a first installation position 36 is separated between the partition 35 and the side of the heating box 31. The installation position is in the form of a sheet and has only a thickness to accommodate the first heating component 33. The first heating component 33 is placed in the first installation position 36. The partition 35 separates the first installation position 36 from the sodium ion battery cell 2, thereby avoiding the extrusion of the sodium ion battery cell 2 on the first heating component 33, and providing a basis for the category selection of the first heating component 33. The inner wall of the partition 35 and the side wall of the sodium ion battery cell 2 are very small, which improves the heating efficiency of the first heating component 33 for the sodium ion battery cell 2. The first heat transfer holes 37 are densely distributed on the partition 35, so that the sodium ion battery cell 2 and the first heating component 33 are in a connected state, which facilitates the heat generated by the first heating component 33 to be directly transferred to the sodium ion battery cell 2, thereby improving the heating efficiency. As another function, the first heat transfer hole 37 can also be used to set a limit bolt 38, which is inserted into the first heat transfer hole 37, and its limit section 39 is horizontally placed above the sodium ion battery 2, which is used to apply a vertical limit fixing effect to the sodium ion battery 2, so as to fix the sodium ion battery 2 in the heating box 31; the limit bolt 38 is detachably connected to the first heat transfer hole 37 by screw connection, which is convenient for disassembly and assembly; moreover, the first heat transfer hole 37 is densely distributed on the partition 35, and the setting position and setting number of the limit bolt 38 can be flexibly adjusted, so as to fix the sodium ion battery 2 of different sizes. In addition, the front end of the first connecting section 40 of the limit bolt 38 penetrates into the first installation position 36, which is equivalent to being horizontally placed above the first heating component 33, and has a limit function for the first heating component 33 to prevent it from falling out of the first installation position 36. The limit can be formed and released by adjusting the insertion depth of the limit bolt 38, and the operation is flexible. In order to compensate for the possible large or small distance between the limiting segment 39 and the upper end surface of the sodium ion battery cell 2, an elastic cushion layer is provided between the limiting segment 39 and the sodium ion battery cell 2. The elastic cushion layer can also prevent the limiting segment 39 from causing possible pressure damage to the upper end surface of the sodium ion battery cell 2. In addition, a limiting plane 41 is provided on the limiting segment 39 to further increase the force-bearing area therebetween.

[0070] In this embodiment, the temperature measuring groove 62 on the inner side of the heating box 31 is located between the first heat transfer holes 37. This prevents the heat generated by the first heating component 33 from being directly applied to the temperature measuring probe 61 through the first heat transfer holes 37, thereby improving the accuracy of temperature detection.

[0071] In this embodiment, 8 groups of sodium ion cells 2 are provided, and a frame-shaped intermediate plate 42 is provided between adjacent sodium ion cells 2. A second sheet-shaped installation position 43 is formed in the intermediate plate 42, and a second heating assembly 34 is accommodated in the second installation position 43. The intermediate plate 42 is densely covered with second heat transfer holes 44 that are arranged through the thickness direction, and a fixing structure for fixing the intermediate plate 42 is provided between the second heat transfer holes 44 and the sodium ion cells 2. The fixing structure includes a fixing bolt 45 that is engaged in the second heat transfer hole 44 through a threaded structure, and a second connecting section 46 of the fixing bolt 45 passes through the second heat transfer hole 44 and is laterally inserted into the second installation position 43, and the second heating assembly 34 is limited below the second connecting section 46; the fixing section 47 of the fixing bolt 45 is provided with two mutually parallel axially extending bonding planes 48, and the bonding plane 48 is bonded and fixed to the upper end surface of the sodium ion cell 2 through a double-sided adhesive strip.

[0072] Specifically, this embodiment is provided with 8 groups of sodium ion batteries 2 of 75Ah, forming a 24V sodium electric parking power system. Only 2 groups of sodium ion batteries 2 are drawn in the figure for illustration. Adjacent sodium ion batteries 2 are separated by an intermediate plate 42, and the interior of the intermediate plate 42 is hollow, forming a second mounting position 43 similar to the first mounting position 36, and a second heating component 34 is provided in the second mounting position 43, which is used to heat the sodium ion batteries 2 on both sides of the intermediate plate 42, and in order to improve the heating efficiency, a second heat transfer hole 44 is also provided on the intermediate plate 42, and the width of the intermediate plate 42 is adapted to the width of the battery storage cavity 32, and the intermediate plate 42 is just stuck in the battery storage cavity 32, and the fixed structure is used to realize the fixed installation of the fixed plate. Similar to the limiting bolt 38, the fixing bolt 45 is detachably connected to the second heat transfer hole 44, the second connecting section 46 penetrates into the second mounting position 43 to limit the second heating component 34, and the fixing section 47 is provided with a bonding plane 48, which is parallel to the upper end surface of the sodium ion battery cell 2, and a double-sided adhesive strip is arranged between the two planes to realize the bonding and fixation between the middle plate 42 and the sodium ion battery cell 2, with a simple structure, convenient disassembly and assembly, and low installation cost.

[0073] As an optimization of this embodiment, the diameter of the first heat transfer hole 37 is consistent with the diameter of the second heat transfer hole 44, and the fixing bolt 45 is the same as the limiting bolt 38, so that the processing cost is reduced and the use is more flexible.

[0074] like Figure 6 As shown, seven drainage grooves 49 are arranged in parallel on the inner bottom surface of the heating box 31. The drainage grooves 49 penetrate the bottom of the battery cell storage cavity 32, the first installation position 36 where the first heating component 33 is located, and the second installation position 43 where the second heating component 34 is located, and are connected to the outside of the heating box 31. The temperature measuring groove 62 and the wiring groove 63 on the inner bottom surface of the heating box 31 are located between the two drainage grooves 49 and are not connected to the drainage grooves 49.

[0075] Specifically, the drainage groove 49 is arranged at the bottom of the heating box 31, and is connected to the battery storage chamber 32, the first mounting position 36 and the second mounting position 43 at the same time, and the outer end is connected to the outside of the heating box 31, and is used to guide the condensed water generated by the temperature difference change in the heating box 31. The wiring groove 63 and the drainage groove 49 are both linear, and the wiring groove 63 and the temperature measuring groove 62 are located between the drainage groove 49 but are not connected, so as to avoid the flowing water in the drainage groove 49 from entering the wiring groove 63 and the temperature measuring groove 62, affecting the service life of the temperature measuring probe 61 and the connecting wire. The temperature measuring groove 62 is evenly arranged along the length direction of the wiring groove 63. According to the specific sodium ion battery 2 model, a temperature measuring probe 61 is arranged in the temperature measuring groove 62 under each sodium ion battery 2 to ensure that the temperature data at the bottom of each sodium ion battery 2 is detected, which has strong flexibility.

[0076] In this embodiment, a heat-insulating layer 50 is fixed on the outer wall of the heating box 31 to insulate the heating box 31 and improve the heating efficiency in the heating box 31. The heater is a rectangular metal wire heating film, and the size of the metal wire heating film is smaller than the size of the installation position.

[0077] Specific working principle: when the control circuit 7 receives the parking signal, the switch circuit 74 controls the switch relay component 72 to be turned on, and when the temperature data of the temperature probe 61 received by the control circuit 7 reaches the preset value, the temperature control switch component 71 is controlled to be turned on, a loop is formed between the sodium ion battery cell 2 and the heating module 3, and the heater starts to work to heat the side wall of the sodium ion battery cell 2; when the temperature data of the temperature probe 61 received by the control circuit 7 reaches the preset value, the switch relay component 72 is controlled to be disconnected, and the heater stops working, ensuring that the sodium-electric parking power supply always maintains a sufficient voltage level when parking is required.

[0078] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A sodium-electric parking power supply, comprising a battery box (1) and a sodium-ion battery cell (2) arranged in the battery box (1), characterized in that: A heating module (3) is provided between the sodium ion battery cell (2) and the battery box (1); the heating module (3) is electrically connected to the positive and negative electrodes of the sodium ion battery cell (2) through a control circuit (7) and is powered by the sodium ion battery cell (2); a temperature measurement module (6) is also provided between the sodium ion battery cell (2) and the battery box (1); the temperature measurement module (6) is electrically connected to the control circuit (7); and the heater of the heating module (3) is detachably fixed between the sodium ion battery cell (2) and the battery box (1).

2. The sodium electric parking power supply according to claim 1, characterized in that: The control circuit (7) comprises a temperature control switch component (71) and a relay switch component (72) connected in series between the sodium ion battery cell (2) and the heating module (3); The temperature control switch assembly (71) is electrically connected to the control circuit (7); The relay switch assembly (72) is connected to a switch circuit (74) and is controlled to be on and off by the switch circuit (74).

3. The sodium electric parking power supply according to claim 2, characterized in that: The temperature measuring module (6) comprises a temperature measuring probe (61), and at least one temperature measuring groove (62) is respectively provided on the inner bottom surface and the inner side surface of the heating box (31) of the heating module (3), and the temperature measuring probe (61) is provided in the temperature measuring groove (62); One end of the temperature measuring tank (62) is connected to a wiring slot (63), and the wiring slot (63) is provided on the inner bottom surface and inner side surface of the heating box (31), and the wire outlet (64) at the outer end thereof is connected to the outside through the upper opening of the heating box (31); The temperature measuring probe (61) is connected to a connecting wire, which is arranged in the wiring groove (63) and passes through the wire outlet (64) to be electrically connected to the control circuit (7).

4. The sodium electric parking power supply according to any one of claims 1 to 3, characterized in that: The heating module (3) comprises a heating box (31) fixed in the battery box (1) and having an open upper opening, wherein a cell storage cavity (32) for installing the sodium ion cell (2) is formed in the heating box (31); A first heating component (33) of the heater is provided between the inner wall of the heating box (31) and the sodium ion battery cell (2); When a plurality of groups of the sodium ion battery cells (2) are provided, a second heating assembly (34) of the heater is further provided between adjacent sodium ion battery cells (2).

5. The sodium electric parking power supply according to claim 4, characterized in that: A partition (35) is vertically fixed in the heating box (31), and the partition (35) is arranged parallel to the inner wall of the heating box (31) and spaced apart, and a sheet-shaped first installation position (36) is formed between them. The first installation position (36) accommodates the first heating component (33), and the inner wall of the partition (35) is in contact with or almost in contact with the side wall of the sodium ion battery cell (2).

6. The sodium electric parking power supply according to claim 5, characterized in that: The partition (35) is uniformly and densely distributed with first heat transfer holes (37) which are arranged through the partition (35) in the thickness direction, and a limiting structure for limiting and fixing the sodium ion battery cell (2) is provided between the first heat transfer holes (37) and the sodium ion battery cell (2); The limiting structure comprises a limiting bolt (38) which is tightly inserted into or engaged with the first heat transfer hole (37) through a threaded structure, and the limiting section (39) of the limiting bolt (38) abuts against the upper end surface of the sodium ion battery cell (2); the first connecting section (40) of the limiting bolt (38) passes through the first heat transfer hole (37) and is laterally inserted into the first installation position (36), and the first heating component (33) is limited below the first connecting section (40).

7. The sodium electric parking power supply according to claim 4, characterized in that: The sodium ion battery cells (2) are provided in multiple groups, a frame-shaped intermediate plate (42) is provided between adjacent sodium ion battery cells (2), a second sheet-shaped installation position (43) arranged vertically is formed in the intermediate plate (42), the second installation position (43) accommodates the second heating component (34), the intermediate plate (42) is densely covered with second heat transfer holes (44) arranged through the intermediate plate (42) in the thickness direction, and a fixing structure for fixing the intermediate plate (42) is provided between the second heat transfer holes (44) and the sodium ion battery cells (2).

8. The sodium electric parking power supply according to claim 7, characterized in that: The fixing structure comprises a fixing bolt (45) which is tightly inserted into or engaged with the second heat transfer hole (44) through a threaded structure; the second connecting section (46) of the fixing bolt (45) passes through the second heat transfer hole (44) and is laterally inserted into the second installation position (43); the second heating component (34) is limited below the second connecting section (46); the fixing section (47) of the fixing bolt (45) comprises at least one axially extending bonding plane (48); the bonding plane (48) is bonded and fixed to the upper end surface of the sodium ion battery cell (2) through a double-sided adhesive strip.

9. The sodium electric parking power supply according to claim 4, characterized in that: At least one drainage groove (49) is provided on the inner bottom surface of the heating box (31), and the drainage groove (49) simultaneously passes through the bottom of the battery cell storage cavity (32), the first installation position (36) where the first heating component (33) is located, and the second installation position (43) where the second heating component (34) is located, and is connected to the outside of the heating box (31).

10. The sodium electric parking power supply according to claim 4, characterized in that: A heat-insulating layer (50) is fixed on the outer wall of the heating box (31); The heater comprises a PTC heating element and / or a metal wire heating film and / or a heating tube with a heat-conducting liquid flowing therethrough.

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