Battery constant temperature control system, battery constant temperature control method and electronic device

Abstract

The application discloses a battery constant-temperature control system, a battery constant-temperature control method and electronic equipment, and relates to the technical field of battery temperature control equipment. The battery constant-temperature control system comprises a circulating liquid path and a temperature control assembly. The circulating liquid path comprises a liquid pump and a circulating liquid pipe communicated with the liquid pump. The temperature control assembly is arranged on the second side of the battery. The temperature control assembly comprises a thermoelectric cooler in thermal conduction with the battery and a phase change block in thermal conduction with the thermoelectric cooler. The thermoelectric cooler is located between the second side and the phase change block. The side, away from the thermoelectric cooler, of the phase change block and the first side of the battery are both in thermal conduction with the circulating liquid pipe. The application adjusts the current flow direction of the thermoelectric cooler according to the temperature rising acceleration, so that one end in thermal conduction with the battery is a cold end or a hot end, the real-time regulation and control of the battery temperature are realized, and the battery can always be ensured to be in the best working temperature range during use.

Description

Technical Field

[0001] This invention relates to the field of battery temperature control equipment technology, and in particular to a battery constant temperature control system, a battery constant temperature control method, and an electronic device. Background Technology

[0002] Battery temperature control has a crucial impact on battery performance, lifespan, and safety. Batteries perform optimally when operating within a specific temperature range. Thermostatic control ensures that the battery operates within this optimal temperature range, thereby improving discharge efficiency, capacity, and power output. Both high and low temperatures can damage batteries and shorten their lifespan. Thermostatic control effectively prevents batteries from being exposed to extreme temperatures, thus extending their overall lifespan. Batteries are prone to malfunction, and may even ignite or explode, under excessively hot or cold conditions. Thermostatic control ensures that the battery remains within a safe operating temperature range, thereby mitigating these risks.

[0003] Existing technologies typically control battery temperature by increasing heat dissipation or heat exchange through heat sinks, phase change materials, or other means. However, these methods usually only control the battery temperature within a general range and cannot achieve precise temperature control or guarantee that the battery temperature is within the optimal operating temperature range. Summary of the Invention

[0004] The main objective of this invention is to propose a battery constant temperature control system, a battery constant temperature control method, and an electronic device, which aims to solve the problem that traditional battery temperature control strategies cannot achieve precise control of battery temperature and cannot guarantee that the battery temperature is controlled within the optimal operating temperature range.

[0005] To achieve the above objectives, the present invention proposes a battery constant temperature control system, the battery constant temperature control system comprising:

[0006] A circulating fluid circuit, the circulating fluid circuit including a pump and a circulating fluid pipe connected to the pump;

[0007] A temperature control component is disposed on the second side of the battery. The temperature control component includes a thermoelectric cooler that is thermally connected to the battery and a phase change block that is thermally connected to the thermoelectric cooler. The thermoelectric cooler is located between the second side and the phase change block. The side of the phase change block away from the thermoelectric cooler and the first side of the battery are both thermally connected to the circulating liquid pipe. The first side and the second side are arranged opposite to each other. The thermoelectric cooler is used to adjust its current flow direction according to the heating acceleration of the battery, so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to be the cold end or the hot end.

[0008] In one embodiment, the circulating fluid path includes a first heat-conducting plate and a second heat-conducting plate. The first heat-conducting plate and the second heat-conducting plate are respectively disposed on the first side and the side of the phase change block away from the thermoelectric cooler. The circulating fluid pipe passes through the first heat-conducting plate and the second heat-conducting plate. The first heat-conducting plate is thermally connected to the side of the phase change block away from the thermoelectric cooler, and the second heat-conducting plate is thermally connected to the first side.

[0009] In one embodiment, the battery constant temperature control system further includes a control chip, which is used to acquire the temperature value of the battery and calculate the heating acceleration based on the temperature value. The circulating fluid circuit further includes a third heat-conducting plate, which is thermally connected to the control chip. The circulating fluid pipe passes through the third heat-conducting plate, and the circulating fluid pipe in the first heat-conducting plate and the third heat-conducting plate are connected.

[0010] In one embodiment, the circulating liquid pipe includes a first liquid path and a second liquid path. The first liquid path passes through the first heat-conducting plate and the third heat-conducting plate and forms a first circuit with the liquid pump. The second liquid path is connected in parallel to the first liquid path and passes through the second heat-conducting plate. The connection between the second liquid path and the first liquid path is located between the first heat-conducting plate and the third heat-conducting plate.

[0011] In one embodiment, the first liquid path is coiled and distributed in each region of the first heat-conducting plate and each region of the second heat-conducting plate; the second liquid path is coiled and distributed in each region of the third heat-conducting plate.

[0012] This invention also proposes a battery constant temperature control method, applied to the battery constant temperature control system described above, the method comprising:

[0013] The temperature value of the battery during operation is detected once at each sampling cycle;

[0014] The heating acceleration a of the battery is calculated based on the temperature values ​​corresponding to multiple sampling periods;

[0015] The thermoelectric cooler adjusts its current flow direction according to the heating acceleration a, so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to be either the cold end or the hot end.

[0016] In one embodiment, the step of adjusting the current flow direction of the thermoelectric cooler according to the heating acceleration a, so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to be the cold end or the hot end, includes:

[0017] If the temperature value of the current sampling period reaches the first threshold and the temperature value of the previous sampling period is less than the temperature value of the current sampling period, and if the heating acceleration a≥0, then the thermoelectric cooler adjusts its current flow direction so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to the cold end.

[0018] When the temperature value of this sampling period reaches the second threshold, if the heating acceleration a ≥ 0, the thermoelectric cooler adjusts its current flow direction so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to the cold end; if the heating acceleration a < 0, the battery is determined to be in a low charge state, and the power supply to the thermoelectric cooler is cut off, wherein the second threshold is greater than the first threshold.

[0019] If the temperature value of the current sampling period reaches the first threshold and the temperature value of the previous sampling period is greater than the temperature value of the current sampling period, and if the heating acceleration a < 0, the thermoelectric cooler adjusts its current flow direction so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to be the hot end.

[0020] In one embodiment, after calculating the temperature acceleration 'a' of the battery based on the temperature values ​​corresponding to the plurality of sampling periods, the method further includes:

[0021] If the temperature value of this sampling period does not reach the first threshold and the heating acceleration a < 0, then the battery is determined to be malfunctioning and the battery is controlled to stop working.

[0022] In one embodiment, the step of calculating the heating acceleration 'a' of the battery based on the temperature values ​​corresponding to the plurality of sampling periods includes:

[0023]

[0024] Among them, T s T represents the battery temperature value at the s-th second of this sampling period. s-k Let t be the temperature value of the battery at the sk-th second, k be the duration of a sampling period, and Δt = k.

[0025] The present invention also proposes an electronic device that applies the battery constant temperature control system described above.

[0026] In this invention, the battery constant temperature control system directly connects to the first side of the battery via a circulating fluid circuit for initial heat exchange. Simultaneously, the second side of the battery connects to the thermoelectric cooler for further heat exchange. A phase change block stores the heat generated by the thermoelectric cooler. The thermoelectric cooler adjusts its current flow according to the battery's heating rate. When the battery's temperature rises rapidly and is about to exceed the maximum temperature, the thermoelectric cooler adjusts its current flow, making the end of the thermoelectric cooler connected to the battery the cold end, thus cooling the battery. Conversely, when the battery's temperature drops rapidly and is about to fall below the minimum temperature, the thermoelectric cooler adjusts its current flow, making the end of the thermoelectric cooler connected to the battery the hot end. This ensures that the battery remains within its optimal operating temperature range throughout use, achieving precise temperature control.

[0027] This invention uses a thermoelectric cooler to adjust the current flow direction according to the heating acceleration, so that the end that is thermally connected to the battery is the cold end or the hot end, thereby achieving real-time control of the battery temperature. This ensures that the battery can always be kept within the optimal operating temperature range during use, thereby improving battery performance, extending the overall battery life, and enhancing battery safety. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a battery constant temperature control system according to an embodiment of the present invention;

[0030] Figure 2 This is a side view schematic diagram of a battery constant temperature control system according to an embodiment of the present invention;

[0031] Figure 3 This is an exploded structural diagram of a battery constant temperature control system according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic flowchart of a battery constant temperature control method according to an embodiment of the present invention;

[0033] Figure 5 This is a detailed flowchart of step S300 in a battery constant temperature control method according to an embodiment of the present invention.

[0034] Explanation of icon numbers:

[0035] 100. Battery constant temperature control system; 10. Circuit board; 20. Circulating liquid circuit; 21. Liquid pump; 22. Circulating liquid pipe; 221. First liquid circuit; 222. Second liquid circuit; 23. First heat conduction plate; 24. Second heat conduction plate; 25. Third heat conduction plate; 30. Temperature control component; 31. Thermoelectric cooler; 32. Phase change block; 40. Battery; 41. First side; 42. Second side.

[0036] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0040] Existing technologies typically control battery temperature by increasing heat dissipation or heat exchange through heat sinks, phase change materials, or other means. However, these methods usually only control the battery temperature within a general range and cannot achieve precise temperature control or guarantee that the battery temperature is within the optimal operating temperature range.

[0041] To solve the above problems, the present invention provides a battery constant temperature control system 100.

[0042] Please combine Figures 1 to 3In one embodiment of the present invention, the battery constant temperature control system 100 includes a circulating liquid circuit 20 and a temperature control component 30. The circulating liquid circuit 20 includes a liquid pump 21 and a circulating liquid pipe 22 connected to the liquid pump 21. The temperature control component 30 is disposed on the second side 42. The temperature control component 30 includes a thermoelectric cooler 31 that is thermally connected to the battery 40 and a phase change block 32 that is thermally connected to the thermoelectric cooler 31. The thermoelectric cooler 31 is located between the second side 42 and the phase change block 32. The side of the phase change block 32 away from the thermoelectric cooler 31 and the first side 41 of the battery 40 are both thermally connected to the circulating liquid pipe 22. The first side 41 and the second side 42 are arranged opposite to each other. The thermoelectric cooler 31 is used to accelerate the adjustment of its current flow direction according to the temperature rise of the battery 40, so as to adjust the end of the thermoelectric cooler 31 that is thermally connected to the battery 40 to be a cold end or a hot end.

[0043] Understandably, the temperature rise acceleration of battery 40 can be calculated by acquiring multiple temperature values ​​of battery 40 over a period of time using a temperature sensor. The temperature rise acceleration can be calculated by adding a separate control chip within the battery constant temperature control system 100, or by using a control chip within an electronic device that incorporates the battery constant temperature control system 100. Simultaneously, the control chip can be used to control the operation of battery 40. This control chip can be the same one used to calculate the temperature rise acceleration, or it can be a separate control chip.

[0044] It should be noted that thermal conduction means that the two parties involved in thermal conduction can exchange heat. The specific connection relationship is not limited, as long as heat exchange can be carried out.

[0045] In operation, the battery constant temperature control system 100 of this invention directly connects to the first side 41 of the battery 40 via the circulating fluid circuit 20, thereby performing initial heat exchange on the first side 41. Simultaneously, the second side 42 of the battery 40 connects to the thermoelectric cooler 31 for further heat exchange. The phase change block 32 stores the heat generated by the thermoelectric cooler 31. The thermoelectric cooler 31 adjusts its current flow direction according to the heating acceleration of the battery 40. When the battery 40 accelerates its heating and is about to exceed the maximum temperature value, the thermoelectric cooler 31 adjusts its current flow direction, making the end of the thermoelectric cooler 31 that is thermally connected to the battery 40 the cold end, thereby cooling the battery 40. Conversely, when the battery 40 accelerates its cooling and is about to fall below the minimum temperature value, the thermoelectric cooler 31 adjusts its current flow direction, making the end of the thermoelectric cooler 31 that is thermally connected to the battery 40 the hot end. This ensures that the battery 40 is always within its optimal operating temperature range during operation, achieving precise temperature control of the battery 40.

[0046] This invention adjusts the current flow direction of the thermoelectric cooler 31 according to the heating acceleration so that the end that is thermally connected to the battery 40 is the cold end or the hot end, thereby realizing real-time temperature control of the battery 40. This ensures that the battery can always be kept within the optimal operating temperature range during use, thereby improving the performance of the battery 40, extending the overall life of the battery 40, and improving the safety of the battery 40.

[0047] In one embodiment, the circulating fluid path 20 includes a first heat-conducting plate 23 and a second heat-conducting plate 24. The first heat-conducting plate 23 and the second heat-conducting plate 24 are respectively disposed on the first side 41 and the side of the phase change block 32 away from the thermoelectric cooler 31. The circulating fluid pipe 22 passes through the first heat-conducting plate 23 and the second heat-conducting plate 24. The first heat-conducting plate 23 is thermally connected to the side of the phase change block 32 away from the thermoelectric cooler 31, and the second heat-conducting plate 24 is thermally connected to the first side 41. The first heat-conducting plate 23 is thermally connected to the side of the phase change block 32 away from the thermoelectric cooler 31, and the second heat-conducting plate 24 is thermally connected to the first side 41 of the battery 40. The circulating liquid pipe 22 passes through the first heat-conducting plate 23 and the second heat-conducting plate 24. The heat-conducting plates increase the thermal conductivity area between the circulating heat pipe and the first side 41 and the phase change block 32, which can effectively transfer heat from the battery 40 and the phase change block 32 to the circulating heat pipe, improving the heat exchange efficiency. At the same time, the heat-conducting plates can make the heat transfer more uniform and avoid local overcooling or overheating.

[0048] In one embodiment, the battery 40 constant temperature control system further includes a control chip, which is used to acquire the temperature value of the battery 40 and calculate the heating acceleration based on the temperature value. The circulating fluid path 20 also includes a third heat-conducting plate 25, which is thermally connected to the control chip. A circulating fluid pipe 22 passes through the third heat-conducting plate 25, and the circulating fluid pipe 22 in the first heat-conducting plate 23 and the third heat-conducting plate 25 are connected. Excessive temperature of the control chip can affect its performance in handling heating acceleration and its control performance of the thermoelectric cooler 31, and may even lead to control chip failure. The design of the third heat-conducting plate 25 increases the thermal conductivity area between the circulating fluid path 20 and the control chip, allowing the circulating fluid path 20 to effectively remove the heat generated by the control chip and prevent performance degradation or failure due to overheating.

[0049] Furthermore, the battery constant temperature control system 100 also includes a circuit board 10, on which a control chip is provided. The control chip is used to acquire the temperature value detected by the temperature sensor and calculate the heating acceleration of the battery 40 based on the temperature value. It also sends a command to the thermoelectric cooler 31 based on the heating acceleration, so that the thermoelectric cooler 31 can adjust its current flow direction according to the command, thereby adjusting the end of it that is thermally connected to the battery 40 to be the cold end or the hot end.

[0050] Specifically, the thermoelectric cooler 31 includes a commutator, which is used to receive instructions sent by the control chip and adjust the current flow direction of the thermoelectric cooler 31 according to the instructions.

[0051] In one embodiment, the circulating liquid pipe 22 includes a first liquid path 221 and a second liquid path 222. The first liquid path 221 passes through the first heat-conducting plate 23 and the third heat-conducting plate 25, forming a first circuit with the liquid pump 21. The second liquid path 222 is connected in parallel to the first liquid path 221 and passes through the second heat-conducting plate 24, with the connection between the second liquid path 222 and the first liquid path 221 located between the first heat-conducting plate 23 and the third heat-conducting plate 25. The second liquid path 222 being connected in parallel to the first liquid path 221 and passing through the second heat-conducting plate 24 allows the medium in the first liquid path 221 to enter the second liquid path 222 in advance to exchange heat with the phase change block 32. This avoids the medium entering the third heat-conducting plate 25 only after passing through the first heat-conducting plate 23 and the second heat-conducting plate 24, which would result in an excessively large temperature difference between the first heat-conducting plate 23 and the third heat-conducting plate 25, thus ensuring uniform heat exchange and improving the heat exchange efficiency of the system.

[0052] In one embodiment, the first liquid path 221 is coiled and distributed in each region of the first heat-conducting plate 23 and each region of the second heat-conducting plate 24; the second liquid path 222 is coiled and distributed in each region of the third heat-conducting plate 25.

[0053] The first liquid path 221 and the second liquid path 222 are both coiled and distributed in various areas of the first heat-conducting plate 23, the second heat-conducting plate 24 and the third heat-conducting plate 25, increasing the contact area between the circulating liquid path 20 and the first heat-conducting plate 23, the second heat-conducting plate 24 and the third heat-conducting plate 25, thereby improving the heat exchange efficiency and enhancing the heat exchange capacity, thus improving the temperature management effect of the entire battery constant temperature control system 100.

[0054] Please combine Figure 1 and Figure 4 The present invention also proposes a battery constant temperature control method, applied to the battery constant temperature control system 100 described above, the method comprising:

[0055] S100: The temperature value of the battery during operation is detected once every sampling cycle;

[0056] The duration of the sampling period depends on the usage requirements. Usually, a sampling period of 1 second can be selected, or the duration of the sampling period can be extended.

[0057] S200: Calculate the heating acceleration a of the battery based on the temperature values ​​corresponding to the multiple sampling periods;

[0058] The temperature change value is calculated based on the temperature values ​​of multiple sampling periods, and the heating acceleration a is calculated based on the temperature change value and the duration corresponding to the sampling period.

[0059] S300: The thermoelectric cooler adjusts its current flow direction according to the heating acceleration a, so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to be the cold end or the hot end.

[0060] When the battery 40 accelerates its temperature rise and is about to exceed the maximum temperature value, the thermoelectric cooler 31 adjusts its current flow direction, turning the end of the thermoelectric cooler 31 that is thermally connected to the battery 40 into the cold end, thereby cooling the battery 40. When the battery 40 accelerates its temperature drop and is about to fall below the minimum temperature value, the control chip adjusts the current flow direction of the thermoelectric cooler 31, turning the end of the thermoelectric cooler 31 that is thermally connected to the battery 40 into the hot end, so that the battery 40 can always be kept within the optimal operating temperature range during use, achieving precise temperature control of the battery 40.

[0061] This invention uses a thermoelectric cooler to adjust the current flow direction according to the heating acceleration, so that the end that is thermally connected to the battery is either the cold end or the hot end. This ensures that the battery can always be kept within the optimal operating temperature range during use, thereby improving the performance of the battery 40, extending the overall life of the battery 40, and improving the safety of the battery 40.

[0062] The specific structure and usage of the battery constant temperature control system 100 in the battery 40 constant temperature control method are as described in the above embodiments. Since the battery 40 constant temperature control method adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0063] Please see Figure 5 In one embodiment, step S300 includes:

[0064] S310: When the temperature value of the current sampling period reaches the first threshold and the temperature value of the previous sampling period is less than the temperature value of the current sampling period, if the heating acceleration a≥0, the thermoelectric cooler adjusts its current flow direction so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to the cold end.

[0065] The first threshold is the lowest value in the optimal operating temperature of battery 40. When the temperature value of the current sampling period reaches the first threshold and the temperature value of the previous sampling period is less than the temperature value of the current sampling period, it means that battery 40 is accelerating its temperature rise. At this time, battery 40 needs to be cooled down. Therefore, the end of thermoelectric cooler 31 that is thermally connected to battery 40 is adjusted to the cold end.

[0066] S320: When the temperature value of this sampling period reaches the second threshold, if the heating acceleration a≥0, the thermoelectric cooler adjusts its current flow direction so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to the cold end; if the heating acceleration a<0, the battery is determined to be in a low power state and the power supply to the thermoelectric cooler is cut off, wherein the second threshold is greater than the first threshold;

[0067] The second threshold is the highest value among the optimal operating temperatures of battery 40. When the temperature value of this sampling period reaches the second threshold, it means that battery 40 exceeds the highest temperature and is accelerating its temperature rise. At this time, it is necessary to cool down battery 40. Therefore, the end of thermoelectric cooler 31 that is thermally connected to battery 40 is adjusted to the cold end, and the cooling effect of the cold end of thermoelectric cooler 31 can be appropriately improved. Specifically, the cooling effect can be improved by increasing the current.

[0068] S330: When the temperature value of the current sampling period reaches the first threshold and the temperature value of the previous sampling period is greater than the temperature value of the current sampling period, if the heating acceleration a < 0, the thermoelectric cooler adjusts its current flow direction so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to be the hot end.

[0069] When the temperature value of the current sampling period reaches the first threshold and the temperature value of the previous sampling period is greater than the temperature value of the current sampling period, it means that the battery 40 is cooling down rapidly. At this time, the battery 40 needs to be heated to avoid the battery 40 temperature from being too low. Therefore, the end of the thermoelectric cooler 31 that is thermally connected to the battery 40 is adjusted to the hot end.

[0070] In one specific embodiment, the optimal operating temperature of battery 40 is 40°C, with a fluctuation of no more than 1°C. Therefore, the first threshold can be 44°C, and the second threshold can be 46°C.

[0071] In one embodiment, the process further includes the following after S200:

[0072] S290: If the temperature value of this sampling period does not reach the first threshold and the heating acceleration a < 0, the battery is judged to be malfunctioning and the battery is controlled to stop working.

[0073] Under normal circumstances, the operating temperature of battery 40 must be higher than the second threshold. Therefore, when the temperature value does not reach the first threshold and the heating acceleration slows down, it means that battery 40 cannot reach the optimal operating temperature, and battery 40 is judged to be malfunctioning and will be stopped.

[0074] In one embodiment, step S200 includes:

[0075] S210: Substitute the temperature values ​​from multiple sampling periods into the following formula to calculate the heating acceleration a of the battery;

[0076]

[0077] Among them, T s T represents the battery temperature value at the s-th second of this sampling period. s-k Let t be the temperature value of the battery at the sk-th second, k be the duration of a sampling period, and Δt = k.

[0078] Understandably, the temperature value T is obtained through multiple sampling periods. s T s-k T s-2k Calculate the temperature change value between two adjacent sampling periods, then calculate the temperature rise rate between the two adjacent sampling periods by comparing the temperature change value with the time Δt, and then calculate the temperature rise acceleration by comparing the temperature rise rate with the time Δt again.

[0079] The present invention also proposes an electronic device that uses the battery constant temperature control system 100 described above.

[0080] Understandably, when applied to electronic devices, the control chip can be a chip that is independently set in the battery temperature control system, or it can share a chip with other components in the electronic device.

[0081] The electronic device can be a smart mobile terminal, a smart head-mounted device, or a fixed electrical appliance, etc. The specific structure and usage of the battery temperature control system 100 in this electronic device are as described in the above embodiments. Since this electronic device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.

[0082] Specifically, when the battery constant temperature control system 100 is applied to a smart head-mounted device, the phase change material can be a phase change material with a phase change temperature of about 25℃-45℃. The optimal operating temperature of the battery 40 is 45℃. A fluctuation of 1℃ above or below is considered to maintain a constant temperature state, that is, the optimal battery temperature is between 44℃ and 46℃. Therefore, the first threshold is set to 44℃ and the second threshold is set to 46℃. The sampling period is set to 1S. The temperature sensor detects the temperature of the battery 40 every 1S and sends the temperature value of the battery 40 to the control chip. The control chip calculates the heating acceleration of the battery based on the temperature values ​​corresponding to multiple sampling periods and can send heating or cooling commands to the commutator of the thermoelectric cooler according to the heating acceleration.

[0083] When the temperature of battery 40 reaches 44℃ and the heating acceleration is greater than or equal to zero, and the temperature of the previous sampling period is lower than the temperature of the current sampling period, it indicates that battery 40 is continuously heating up and has reached the optimal temperature range. In order to prevent battery 40 from heating up too quickly to exceed the optimal temperature range, the control chip sends a cooling command to the commutator. The commutator adjusts the current flow direction of the thermoelectric cooler so that the cold end faces battery 40, thereby cooling battery 40 and slowing down the heating rate of battery 40.

[0084] When the temperature of battery 40 reaches 46℃ and the heating acceleration is greater than or equal to zero, and the temperature of the previous sampling period is lower than the temperature of the current sampling period, it indicates that battery 40 is continuously heating up and has reached the maximum value of the optimal temperature range. In order to prevent battery 40 from exceeding the optimal temperature range, the control chip sends a cooling command to the commutator. The commutator adjusts the current flow direction of the thermoelectric cooler so that the cold end faces the battery 40, thereby cooling the battery 40, slowing down the heating rate of battery 40, and increasing the current in the thermoelectric cooler, thereby increasing the cooling effect.

[0085] When the temperature of battery 40 reaches 44℃ and the heating acceleration is less than zero, and the temperature of the previous sampling period is greater than the temperature of the current sampling period, it indicates that battery 40 is continuously cooling down and has dropped to the lowest value of the optimal temperature range. In order to prevent battery 40 from continuing to heat up to below the optimal temperature range, the control chip sends a heating command to the commutator. The commutator adjusts the current flow direction of the thermoelectric cooler so that the hot end faces the battery 40, thereby heating up the battery 40 and slowing down the cooling rate of battery 40.

[0086] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A battery constant temperature control system, characterized in that, The battery constant temperature control system includes: A circulating fluid circuit, the circulating fluid circuit including a pump and a circulating fluid pipe connected to the pump; A temperature control component is disposed on the second side of the battery. The temperature control component includes a thermoelectric cooler that is thermally connected to the battery and a phase change block that is thermally connected to the thermoelectric cooler. The thermoelectric cooler is located between the second side and the phase change block. The side of the phase change block away from the thermoelectric cooler and the first side of the battery are both thermally connected to the circulating liquid pipe. The first side and the second side are arranged opposite to each other. The thermoelectric cooler is used to adjust its current flow direction according to the heating acceleration of the battery, so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to be the cold end or the hot end.

2. The battery constant temperature control system as described in claim 1, characterized in that, The circulating fluid circuit includes a first heat-conducting plate and a second heat-conducting plate. The first heat-conducting plate and the second heat-conducting plate are respectively disposed on the first side and the side of the phase change block away from the thermoelectric cooler. The circulating fluid pipe passes through the first heat-conducting plate and the second heat-conducting plate. The first heat-conducting plate is thermally connected to the side of the phase change block away from the thermoelectric cooler, and the second heat-conducting plate is thermally connected to the first side.

3. The battery constant temperature control system as described in claim 2, characterized in that, The battery constant temperature control system further includes a control chip, which is used to acquire the temperature value of the battery and calculate the heating acceleration based on the temperature value. The circulating liquid circuit also includes a third heat-conducting plate, which is thermally connected to the control chip. The circulating liquid pipe passes through the third heat-conducting plate, and the circulating liquid pipe in the first heat-conducting plate and the third heat-conducting plate are connected.

4. The battery constant temperature control system as described in claim 3, characterized in that, The circulating liquid pipe includes a first liquid path and a second liquid path. The first liquid path passes through the first heat-conducting plate and the third heat-conducting plate and forms a first circuit with the liquid pump. The second liquid path is connected in parallel with the first liquid path and passes through the second heat-conducting plate. The connection between the second liquid path and the first liquid path is located between the first heat-conducting plate and the third heat-conducting plate.

5. The battery constant temperature control system as described in claim 4, characterized in that, The first liquid path is coiled and distributed in each region of the first heat-conducting plate and each region of the second heat-conducting plate; the second liquid path is coiled and distributed in each region of the third heat-conducting plate.

6. A battery constant temperature control method, applied to a battery constant temperature control system as described in any one of claims 1 to 5, characterized in that, The method includes: The temperature value of the battery during operation is detected once at each sampling cycle; The heating acceleration a of the battery is calculated based on the temperature values ​​corresponding to multiple sampling periods; The thermoelectric cooler adjusts its current flow direction according to the heating acceleration a, so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to be either the cold end or the hot end.

7. The battery constant temperature control method as described in claim 6, characterized in that, The step of adjusting the current flow direction of the thermoelectric cooler according to the heating acceleration a, so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to be the cold end or the hot end, includes: If the temperature value of the current sampling period reaches the first threshold and the temperature value of the previous sampling period is less than the temperature value of the current sampling period, and if the heating acceleration a≥0, then the thermoelectric cooler adjusts its current flow direction so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to the cold end. When the temperature value of this sampling period reaches the second threshold, if the heating acceleration a ≥ 0, the thermoelectric cooler adjusts its current flow direction so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to the cold end; if the heating acceleration a < 0, the battery is determined to be in a low charge state, and the power supply to the thermoelectric cooler is cut off, wherein the second threshold is greater than the first threshold. If the temperature value of the current sampling period reaches the first threshold and the temperature value of the previous sampling period is greater than the temperature value of the current sampling period, and if the heating acceleration a < 0, the thermoelectric cooler adjusts its current flow direction so that the end of the thermoelectric cooler that is thermally connected to the battery is adjusted to be the hot end.

8. The battery constant temperature control method as described in claim 7, characterized in that, The step of calculating the heating acceleration 'a' of the battery based on the temperature values ​​corresponding to multiple sampling periods further includes: If the temperature value of this sampling period does not reach the first threshold and the heating acceleration a < 0, then the battery is determined to be malfunctioning and the battery is controlled to stop working.

9. The battery constant temperature control method as described in claim 6, characterized in that, The step of calculating the heating acceleration 'a' of the battery based on the temperature values ​​corresponding to multiple sampling periods includes: The temperature values ​​from multiple sampling periods are substituted into the following formula to calculate the heating acceleration a of the battery; Among them, T s T represents the battery temperature value at the s-th second of this sampling period. s-k Let t be the temperature value of the battery at the sk-th second, k be the duration of a sampling period, and Δt = k.

10. An electronic device, characterized in that, The electronic device is equipped with a battery temperature control system as described in any one of claims 1 to 5.

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