Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment. The battery pack comprises a battery pack and a battery pack, wherein the battery pack comprises a plurality of battery cells; the temperature detection unit is arranged at one end of the battery pack along the second direction and is used for detecting the temperature of the battery core; the heat exchange plate comprises a heat exchange flow channel, an inlet flow channel and an outlet flow channel, the two ends of the heat exchange flow channel are communicated with the inlet flow channel and the outlet flow channel respectively, the heat exchange flow channel flows through one end, provided with the temperature detection unit, of the battery pack, the outlet flow channel is located outside the battery pack, and the first direction and the second direction intersect. According to the battery pack and the electric equipment, the temperature detection unit can accurately measure the lowest temperature or the highest temperature of the battery pack, the charging and discharging states of the battery pack are adjusted according to the temperature information, the performance of the battery pack is improved, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery pack and an electrical device. Background Technology

[0002] To optimize battery pack performance, existing battery packs are equipped with temperature detection devices to monitor the temperature of the battery cells within the pack. The battery pack's control system adjusts operating parameters such as charging and discharging current based on the detected temperature. Since a battery pack contains multiple cells, the temperature of each cell may vary. To ensure the overall performance and lifespan of the battery pack, operating parameters should be adjusted based on the lowest or highest temperature among the multiple cells.

[0003] In the existing technology, due to the limited space inside the battery pack, the temperature detection device is located at the end of the battery pack, and the heat exchange plate covers the entire battery pack area. The temperature detection device cannot accurately detect the lowest or highest temperature of the cells in the battery pack, which in turn affects the accuracy of the adjustment of operating parameters and reduces the performance and service life of the battery pack. Utility Model Content

[0004] This application provides a battery pack and an electrical device that allows a temperature sensor to detect the lowest temperature of the cells in the battery pack, thereby ensuring the accuracy of the battery pack's operating parameter adjustments, fully utilizing the battery pack's performance, and extending the battery pack's service life.

[0005] On one hand, this application provides a battery pack, including:

[0006] A battery pack, comprising a plurality of battery cells arranged side by side along a first direction;

[0007] A temperature detection unit is located at one end of the battery pack along the second direction. The temperature detection unit is used to detect the temperature of the battery cell.

[0008] The heat exchange plate includes a heat exchange channel, an inlet channel, and an outlet channel. The two ends of the heat exchange channel are connected to the inlet channel and the outlet channel, respectively. The heat exchange channel flows through the end of the battery pack equipped with a temperature detection unit. The outlet channel is located outside the battery pack, and the first direction and the second direction intersect.

[0009] In one possible implementation, the battery pack provided in this application has an outlet flow channel located on one side of the battery pack along a first direction.

[0010] In one possible implementation, the battery pack provided in this application has its inlet flow channel and outlet flow channel located on the same side of the battery pack along a first direction.

[0011] In one possible implementation, the battery pack provided in this application has an inlet channel with an inlet and an outlet channel with an outlet, the inlet and outlet being arranged adjacent to each other, and two outlet channels, with the inlet channel located between the two outlet channels, the inlet channel extending along a first direction and the outlet channel extending along a second direction.

[0012] In one possible implementation, the battery pack provided in this application includes a heat exchange plate comprising a first region and a second region arranged along a first direction, and a heat exchange channel comprising a first heat exchange channel and a second heat exchange channel, wherein the inlet channel and the outlet channel are located at the end of the first region away from the second region along the first direction.

[0013] The first heat exchange channel is coiled around the first region, and its two ends are connected to the inlet channel and the outlet channel, respectively. The second heat exchange channel is coiled around the second region, and its two ends extend through the first region to connect to the inlet channel and the outlet channel, respectively. Furthermore, the portion of the second heat exchange channel that passes through the first region is located outside the first heat exchange channel.

[0014] In one possible implementation, the battery pack provided in this application includes a first upper region and a first lower region symmetrically distributed along a second direction in its first region.

[0015] Both the first upper region and the first lower region are provided with a first heat exchange channel, and the first heat exchange channels in the first upper region and the first lower region are symmetrically distributed.

[0016] In one possible implementation, the battery pack provided in this application includes a second upper region and a second lower region symmetrically distributed along a second direction.

[0017] Both the upper and lower regions are provided with a second heat exchange channel, and the second heat exchange channels in the upper and lower regions are symmetrically distributed.

[0018] In one possible implementation, the battery pack provided in this application includes a first heat exchange channel comprising a first main channel and a plurality of first primary branches arranged in parallel.

[0019] Among them, one end of the first converging channel is connected to the inlet channel, and one end of each of the multiple first-level branches is connected to the first converging channel, while the other end is converged and connected to the outlet channel.

[0020] In one possible implementation, the battery pack provided in this application includes a first primary branch and a first converging point for each primary branch. Each primary branch is divided into multiple primary and secondary branches connected in parallel at the first branch. The multiple primary and secondary branches converge at the first converging point and then connect to the outlet flow channel. The first branch and the first converging point are both located at the bend of the primary branch in the first direction.

[0021] In one possible implementation, the battery pack provided in this application includes a second heat exchange channel comprising a plurality of second converging channels connected in parallel. Each second converging channel includes a second branch point and a second converging point. Each second converging channel is divided into a plurality of second primary branches connected in parallel at the second branch point. The plurality of second primary branches are converged at the second converging point and then connected to the outlet channel.

[0022] In one possible implementation, the battery pack provided in this application further includes a third heat exchange channel, which is arranged in parallel between the first heat exchange channel and the second heat exchange channel. The third heat exchange channel is coiled in the second region, and the end of the third heat exchange channel is connected to the first primary branch downstream of the first converging point.

[0023] In one possible implementation, the battery pack provided in this application further includes: a first structural beam and a second structural beam.

[0024] The first structural beam and the second structural beam are located at both ends of the battery pack along the first direction, and the outlet channel is located on the side of the first structural beam away from the battery pack.

[0025] In one possible implementation, the battery pack provided in this application further includes a third structural beam, which is disposed between the first and second structural beams along a first direction, dividing the heat exchange plate into a first region and a second region.

[0026] In one possible implementation, the battery pack provided in this application further includes: a control unit, which is connected to a temperature detection unit, and the control unit controls the charging and discharging state of the battery pack based on the temperature information of the battery pack detected by the temperature detection unit.

[0027] On the other hand, this application provides an electrical device including any of the aforementioned battery packs.

[0028] In one possible implementation, the electrical equipment provided in this application further includes an air conditioning system connected to a heat exchange plate.

[0029] The battery pack and electrical equipment provided in this application include a battery pack, a temperature detection unit, and a heat exchange plate. The battery pack comprises multiple battery cells arranged along a first direction. The temperature detection unit is located on at least one side of the battery pack along a second direction, where the first and second directions intersect. Therefore, the temperature detected by the temperature detection unit is the temperature of the battery cell near the end along the second direction. The heat exchange plate covers the entire battery pack. When the battery pack temperature is low, the heat exchange plate is activated, and refrigerant enters the heat exchange channel through the inlet channel. During the flow of the refrigerant through the heat exchange channel, it transfers heat to the corresponding battery cell and finally flows out through the outlet channel. Thus, the heat exchange plate completes one heating cycle for the battery pack. Conversely, when the battery pack temperature is high, the same method can be used to exchange heat between the refrigerant and the battery cells to cool the battery pack, allowing it to operate within a suitable temperature range and improving its performance. During the heating or cooling process, the temperature of the refrigerant gradually decreases or increases. Therefore, the temperature difference between the refrigerant flowing through the inlet channel and the outlet channel is relatively large. In the existing technology, the outlet channel is covered in the middle of the battery pack. This results in the temperature of the cells in the middle of the battery pack being the lowest or highest. However, the temperature detection unit is located at the end of the battery pack, making it difficult to accurately detect the lowest or highest temperature of the battery.

[0030] This application places the outlet flow channel outside the battery pack, and connects the outlet flow channel to the end of the heat exchange flow channel that has a temperature detection unit. In this way, the refrigerant temperature in the outlet flow channel is the lowest or highest. The end of the heat exchange flow channel that has a temperature detection unit is the part of the heat exchange flow channel near the outlet flow channel. Therefore, this part is the part of the heat exchange flow channel with the lowest or highest refrigerant temperature. Thus, the part of the battery pack covered by this part, that is, the end of the battery pack with the temperature detection unit, is the part of the battery pack with the lowest or highest temperature. In this way, the temperature detection unit can more accurately detect the lowest or highest temperature of the battery pack, and thus adjust the charging and discharging current and other operating parameters of the battery pack according to the temperature detected by the temperature detection unit, thereby improving the performance of the battery pack and extending its service life. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0033] Figure 2 for Figure 1 A schematic diagram of the battery cell structure in the battery pack;

[0034] Figure 3 for Figure 1 A structural diagram from another perspective;

[0035] Figure 4 A schematic diagram of the structure of the heat exchange plate of the battery pack provided in an embodiment of this application;

[0036] Figure 5 A schematic diagram showing the positional relationship between the heat exchange plate and the battery pack in an embodiment of this application;

[0037] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100 - Battery pack; 110 - Battery cell;

[0040] 200 - Temperature detection unit; 210 - Temperature sensor;

[0041] 300-Heat exchange plate;

[0042] 310 - First region; 311 - Upper first region; 312 - Lower first region;

[0043] 320 - Second region; 321 - Upper second region; 322 - Lower second region;

[0044] 330 - Heat exchanger flow channel; 331 - Inlet flow channel; 3311 - Inlet; 332 - Outlet flow channel; 3321 - Outlet; 333 - First heat exchanger flow channel; 3331 - First converging flow channel; 3332 - First primary branch; 3332a - First branch point; 3332b - First converging point; 3332c - First secondary branch; 334 - Second heat exchanger flow channel; 3341 - Second converging flow channel; 3341a - Second branch point; 3341b - Second converging point; 3342 - Second primary branch; 335 - Third heat exchanger flow channel;

[0045] 400- Enclosure;

[0046] 410 - First structural beam;

[0047] 420 - Third structural beam;

[0048] 430 - Second structural beam. Detailed Implementation

[0049] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application 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 this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0050] As the background technology demonstrates, battery packs need to operate within a certain temperature range, and different charging and discharging currents are selected according to the temperature of the battery pack to fully utilize its performance. To achieve better performance, existing battery packs are equipped with temperature detection devices to monitor the temperature of the battery pack inside. The control system in the electrical device adjusts the charging current and other operating parameters of the battery pack based on the detected temperature. Since a battery pack contains multiple cells, the temperature of each cell and different parts of each cell may vary. To ensure the overall performance and lifespan of the battery pack, the operating parameters should be adjusted based on the lowest or highest temperature among the multiple cells.

[0051] In existing technologies, due to space limitations within the battery pack, the temperature detection device is located at the end of the battery pack, the heat exchange plate covers the entire battery pack area, and the refrigerant inlet and outlet channels within the cold plate are centrally located at corresponding positions in the middle of the battery pack. When the cell temperature inside the battery pack is low, the heat exchange plate needs to be turned on to heat the battery pack, and the refrigerant flows along the channels within the heat exchange plate to transfer heat to the battery pack. Conversely, when the cell temperature inside the battery pack is high, the heat exchange plate needs to be turned on to cool the battery pack to ensure that the battery pack operates within a certain temperature range.

[0052] However, when heating the battery pack, the refrigerant continuously transfers heat outward as it flows through the channels. As more and more heat is transferred, the temperature of the refrigerant decreases. When the refrigerant flows out through the refrigerant outlet channel, its temperature reaches its lowest point. Therefore, the temperature of the cells near the refrigerant outlet channel, i.e., the cells in the middle of the battery pack, is also the lowest. Similarly, when cooling the battery pack, the temperature of the cells in the middle of the battery pack is the highest. However, the temperature detection device can only detect the temperature of the cells at both ends of the battery pack and cannot detect the temperature of the cells in the middle. Thus, the temperature detection device cannot detect the lowest or highest temperature of the cells in the battery pack. At this time, the control system will select the corresponding charging and discharging current based on the measured temperature, which affects the accuracy of the selection of operating parameters such as charging and discharging current, thereby reducing the performance and lifespan of the battery pack.

[0053] In view of this, this application provides a battery pack and an electrical device. The battery pack includes a battery assembly, a temperature detection unit, and a heat exchange plate. The battery assembly includes multiple battery cells arranged along a first direction. The temperature detection unit is located on at least one side of the battery assembly along a second direction. The first and second directions intersect, so the temperature detected by the temperature detection unit is the temperature of the battery cell near the end along the second direction. The heat exchange plate covers the entire battery assembly. When the battery assembly temperature is low, the heat exchange plate is turned on, and refrigerant enters the heat exchange channel through the inlet channel. During the flow of the refrigerant through the heat exchange channel, it transfers heat to the corresponding battery cell and finally flows out through the outlet channel. Thus, the heat exchange plate completes one heating of the battery assembly. Conversely, when the battery assembly temperature is high, the same method can be used to exchange heat between the refrigerant and the battery cells to cool the battery assembly, allowing the battery pack to operate within a suitable temperature range and improving its performance. During the heating or cooling process, the temperature of the refrigerant gradually decreases or increases. Therefore, the temperature difference between the refrigerant flowing through the inlet channel and the outlet channel is relatively large. In the existing technology, the outlet channel is covered in the middle of the battery pack. This results in the temperature of the cells in the middle of the battery pack being the lowest or highest. However, the temperature detection unit is located at the end of the battery pack, making it difficult to accurately detect the lowest or highest temperature of the battery.

[0054] This application places the outlet flow channel outside the battery pack, and connects the outlet flow channel to the end of the heat exchange flow channel that has a temperature detection unit. In this way, the refrigerant temperature in the outlet flow channel is the lowest or highest. The end of the heat exchange flow channel that has a temperature detection unit is the part of the heat exchange flow channel near the outlet flow channel. Therefore, this part is the part of the heat exchange flow channel with the lowest or highest refrigerant temperature. Thus, the part of the battery pack covered by this part, that is, the end of the battery pack with the temperature detection unit, is the part of the battery pack with the lowest or highest temperature. In this way, the temperature detection unit can more accurately detect the lowest or highest temperature of the battery pack, and thus adjust the charging and discharging current and other operating parameters of the battery pack according to the temperature detected by the temperature detection unit, thereby improving the performance of the battery pack and extending its service life.

[0055] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings:

[0056] It should be noted that the battery pack provided in this application embodiment can be applied to various different electrical devices.

[0057] See Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the battery pack of this application embodiment includes: a battery pack 100, a temperature detection unit 200, and a heat exchange plate 300.

[0058] The battery pack 100 may include a plurality of battery cells 110 arranged side by side along a first direction. Each battery cell 110 has electrodes at both ends along a second direction, and the polarities of the electrodes at both ends of each battery cell 110 are opposite, for example, one end is a positive electrode and the other end is a negative electrode. The electrodes of the plurality of battery cells 110 may be connected as needed to achieve series and / or parallel connection between the battery cells 110, thereby enabling the battery pack 100 to have sufficient output power.

[0059] The temperature detection unit 200 can be located at one end of the battery pack 100 along the second direction. The temperature detection unit 200 is used to detect the temperature of the cell 110. Understandably, the temperature at the electrode location of the cell 110 is usually the highest temperature on the cell 110. Therefore, by setting the temperature detection unit 200 at the end of the cell 110 along the second direction, the highest temperature of the battery pack 100 can be obtained during the operation of the battery pack, thereby providing a reference for regulating the operating state of the battery pack. Alternatively, temperature detection units 200 can be set at both ends of the cell 110 along the second direction, so that the temperature of the cell 110 can be detected from two directions, which is beneficial to improving the accuracy of detection.

[0060] The heat exchange plate 300 may include a heat exchange channel 330, an inlet channel 331, and an outlet channel 332. The two ends of the heat exchange channel 330 are connected to the inlet channel 331 and the outlet channel 332, respectively. The heat exchange channel 330 flows through the end of the battery pack 100 that is equipped with a temperature detection unit 200. The outlet channel 332 is located outside the battery pack 100, and the first direction and the second direction intersect.

[0061] In this embodiment of the application, the battery pack 100 includes a plurality of battery cells 110 arranged along a first direction, and a temperature detection unit 200 is disposed on both sides of the battery cells 110 along a second direction. Figure 1 The X direction is the first direction, and the Y direction is the second direction. The specific structure of the temperature detection unit 200 and its connection with the battery pack 100 are not limited in this application embodiment. For example, the temperature detection unit 200 includes multiple temperature sensors 210. The multiple temperature sensors 210 are evenly spaced on the battery pack 100. Each temperature sensor 210 detects the temperature of the cell 110 in a certain area. The minimum temperature measured by each temperature sensor 210 is the temperature value measured by the temperature detection unit 200.

[0062] In practice, the heat exchange plate 300 covers the entire battery pack 100. When the temperature detection unit 200 detects that the temperature of the cell 110 is low, the heat exchange plate 300 is turned on. The refrigerant with a higher temperature enters the heat exchange channel 330 through the inlet channel 331. During the flow of the refrigerant through the heat exchange channel 330, it transfers heat to the corresponding cell 110 and finally flows out through the outlet channel 332. Thus, the heat exchange plate 300 completes one heating of the battery pack 100. Similarly, when the temperature detection unit 200 detects that the temperature of the cell 110 is high, the refrigerant with a lower temperature can also be used in the same way to exchange heat with the cell 110 to cool the battery pack 100, so that the battery pack can always operate within a suitable temperature range and improve the working performance of the battery pack.

[0063] During the heating process of the battery pack, the temperature of the refrigerant gradually decreases, and during the cooling process of the battery pack, the temperature of the refrigerant gradually increases. Therefore, there will be a large temperature difference between the refrigerant flowing through the inlet channel 331 and the outlet channel 332. In the prior art, the outlet channel 332 mainly covers the middle part of the battery pack 100 along the second direction. This results in the lowest or highest temperature of the battery cell 110 in the middle of the battery pack 100. However, since the temperature detection unit 200 is located at the end of the battery pack 100 along the second direction, it is difficult to accurately detect the lowest or highest temperature of the battery pack.

[0064] Therefore, in this application, the outlet flow channel 332 is located outside the battery pack 100, and the outlet flow channel 332 is connected to the end of the heat exchange flow channel 330 that flows through the battery pack 100 and is equipped with the temperature detection unit 200. Thus, taking the heating of the battery pack 100 as an example, the refrigerant in the heat exchange flow channel 330 flows from the end near the inlet flow channel 331 to the end near the outlet flow channel 332, and the temperature of the refrigerant gradually decreases. That is, the part of the refrigerant near the outlet flow channel 332 in the heat exchange flow channel 330 has the lowest temperature. The end of the heat exchange flow channel 330 near the outlet flow channel 332 is the end of the heat exchange flow channel 330 that flows through the battery pack 100 and is equipped with the temperature detection unit 200. Therefore, the battery pack 100... The part covered by this section has the lowest temperature. That is, one end of the temperature detection unit 200 of the battery pack 100 is the part with the lowest temperature in the battery pack 100. In this way, the temperature detection unit 200 can more accurately detect the lowest temperature of the battery pack 100. Similarly, when the battery pack 100 is cooled, one end of the temperature detection unit 200 of the battery pack 100 is the part with the highest temperature in the battery pack 100. This allows the temperature detection unit 200 to more accurately detect the highest temperature of the battery pack 100. Then, based on the temperature detected by the temperature detection unit 200, the charging and discharging current and other operating parameters of the battery pack can be adjusted to improve the performance of the battery pack and extend its service life.

[0065] See also some of the possible implementation methods. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the outlet channel 332 of this embodiment can be set on one side of the battery pack 100 along the first direction, so as to avoid the temperature of the refrigerant in the outlet channel 332 affecting the temperature detection of the battery detection unit 200 set at one end of the battery pack 100 along the second direction, and to provide installation space for the battery detection unit 200.

[0066] For example, both the inlet channel 331 and the outlet channel 332 are located on the side of the first structural beam 410 away from the first region 310. By setting both the inlet channel 331 and the outlet channel 332 on the side of the first structural beam 410 away from the first region 310, it can be ensured that the heat exchange channel 330 covers the entire area of ​​the heat exchange plate 300. On the other hand, it is convenient to connect the inlet channel 331 and the outlet channel 332 to the refrigerant supply device outside the battery pack, such as an air conditioning system, so as to avoid the first structural beam 410 affecting the stability of the connection.

[0067] See also some of the possible implementation methods. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment of the application, the inlet channel 331 and the outlet channel 332 can be arranged on the same side of the battery pack 100 along the first direction.

[0068] It is understandable that both the inlet channel 331 and the outlet channel 332 need to be connected to the same refrigerant supply device. Setting the inlet channel 331 and the outlet channel 332 on the same side of the battery pack 100 along the first direction so that they can be connected to the refrigerant supply device is beneficial to shortening the length of the connecting pipe between the heat exchange plate 300 and the refrigerant supply device, making the distribution of the connecting pipes more orderly and easier to manage.

[0069] See also some of the possible implementation methods. Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment of the application, the inlet channel 331 has an inlet 3311, and the outlet channel 332 has an outlet 3321. The inlet 3311 and the outlet 3321 can be arranged adjacent to each other, which helps to better consolidate the connecting pipe between the heat exchange plate 300 and the refrigerant supply device, making the distribution of the connecting pipe more orderly and easier to manage. There are two outlet channels 332, and the inlet channel 331 is located between the two outlet channels 332. The inlet channel 331 extends along the first direction, and the outlet channel 332 extends along the second direction. This ensures that the part of the heat exchange channel 330 near the outlet channel 332 is located on the periphery of the part of the heat exchange channel 330 near the inlet channel 331, so as to ensure that the end of the battery pack 100 along the second direction is the part with the lowest or highest battery pack temperature.

[0070] See also some of the possible implementation methods. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the heat exchange plate 300 of this application embodiment may include a first region 310 and a second region 320. The first region 310 and the second region 320 are arranged along a first direction. The heat exchange channel 330 includes an inlet channel, an outlet channel, a first heat exchange channel 333, and a second heat exchange channel 334. The inlet channel 331 and the outlet channel 332 are located at the end of the first region 310 away from the second region 320 along the first direction. The first heat exchange channel 333 is coiled around the first region 310, and its two ends are respectively connected to the inlet channel 331 and the outlet channel 332. The second heat exchange channel 334 is coiled around the second region 320, and its two ends extend through the first region 310 to communicate with the inlet channel 331 and the outlet channel 332, respectively. The portion of the second heat exchange channel 334 that passes through the first region 310 is located outside the first heat exchange channel 333.

[0071] Understandably, the heat exchange plate 300 covers the entire battery pack 100. A portion of the multiple battery cells 110 within the battery pack 100 corresponds to the first region 310, and another portion corresponds to the second region 320. Both ends of the first heat exchange channel 333 and the second heat exchange channel 334 of the heat exchange plate 300 are connected to the inlet channel 331 and the outlet channel 332. The first heat exchange channel 333 is coiled within the first region 310, and the second heat exchange channel 334 is coiled within the second region 320. The heat exchange plate 300 can assist in heat dissipation of the battery pack 100 by using a refrigerant with a lower circulating temperature to reduce the temperature of the battery pack 100, or it can heat the battery pack 100 by using a refrigerant with a higher circulating temperature to increase the temperature of the battery pack 100. This ensures that the battery pack 100 always operates within a certain temperature range, guaranteeing the safe and stable operation of the battery pack.

[0072] This application embodiment mainly describes the situation when the heat exchange plate 300 heats the battery pack 100. When the temperature of the battery pack 100 is low, the heat exchange plate 300 is activated. The refrigerant enters the inlet channel 331 and branches into the first heat exchange channel 333 and the second heat exchange channel 334. The refrigerant in the first heat exchange channel 333 and the second heat exchange channel 334 respectively transfers heat to the battery cells 110 corresponding to the first region 310 and the second region 320 to increase the temperature of the battery pack 100. Finally, the refrigerant in the first heat exchange channel 333 and the second heat exchange channel 334 flows into the outlet channel 332 and flows out of the heat exchange plate 300 through the outlet channel 332. Thus, the heat exchange plate 300 completes one heating of the battery pack 100.

[0073] Understandably, since the inlet channel 331 and outlet channel 332 are located at the end of the first region 310 along the first direction away from the second region 320, the first heat exchange channel 333 is coiled within the first region 310, and the second heat exchange channel 334 is coiled within the second region 320. Both ends of the second heat exchange channel 334 must extend through the first region 310 to connect with the inlet channel 331 and outlet channel 332. Therefore, the coverage area of ​​the second heat exchange channel 334 is larger than that of the first heat exchange channel 333, meaning the length of the second heat exchange channel 334 is longer than that of the first heat exchange channel 333. Thus, the refrigerant flow... The amount of heat transferred to the cell 110 through the entire second heat exchange channel 334 is greater than the amount of heat transferred to the cell 110 through the entire first heat exchange channel 333. Therefore, the temperature of the refrigerant entering the outlet channel 332 through the second heat exchange channel 334 is lower than the temperature of the refrigerant entering the outlet channel 332 through the first heat exchange channel 333. Correspondingly, the cell 110 corresponding to the part of the second heat exchange channel 334 that passes through the first region 310 and is connected to the outlet channel 332 receives the least amount of heat compared to all the cells 110 in the battery pack 100. That is, the temperature of the cell 110 corresponding to this part is the lowest temperature part of the battery pack 100.

[0074] Therefore, by placing the portion of the second heat exchange channel 334 that passes through the first region 310 outside the first heat exchange channel 333, the lowest temperature portion of the battery cell 110 within the battery pack 100 can be distributed on both sides of the battery pack 100 along the second direction. Furthermore, since the temperature detection unit 200 is located on both sides of the battery cell 110 along the second direction, the temperature detected by the temperature detection unit 200 is closer to the lowest temperature of the entire battery pack 100. This allows for more accurate adjustment of operating parameters such as the charging and discharging current of the battery pack based on the temperature detected by the temperature detection unit 200, thereby maximizing the performance of the battery pack and extending its service life.

[0075] Furthermore, the first region 310 and the second region 320 can be configured such that the area of ​​the first region 310 is smaller than that of the second region 320, or the areas of the first region 310 and the second region 320 can be equal. The specific areas of the first region 310 and the second region 320 are not limited in this embodiment of the application, as long as it can be ensured that the length of the second heat exchange channel 334 is greater than the length of the first heat exchange channel 333, thereby ensuring that the two sides of the battery pack 100 along the second direction are the parts of the battery pack 100 with the lowest temperature.

[0076] The effect of the heat exchange plate 300 in this embodiment on cooling the battery pack 100 can be similarly demonstrated, and will not be described in detail here.

[0077] See also some of the possible implementation methods. Figure 1 , Figure 2 and Figure 4As shown, in the battery pack of this application embodiment, the first region 310 includes a first upper region 311 and a first lower region 312 symmetrically distributed along the second direction. Both the first upper region 311 and the first lower region 312 are provided with a first heat exchange channel 333, and the first heat exchange channels 333 in the first upper region 311 and the first lower region 312 are symmetrically distributed.

[0078] It is understandable that setting the first region 310 as a first upper region 311 and a first lower region 312 symmetrically distributed along the second direction, and the first heat exchange channels 333 in the first upper region 311 and the first lower region 312 being symmetrically distributed, can make the temperature distribution of some cells 110 corresponding to the first region 310 of the battery pack 100 also symmetrically distributed along the second direction. This ensures that the temperature of the battery pack 100 corresponding to the first region 310 remains consistent on both sides along the second direction, ensuring that the temperature detection units 200 set on both sides of the battery pack 100 along the second direction can detect the lowest temperature of the battery pack 100, thereby improving the accuracy of the temperature detection units 200.

[0079] See also some of the possible implementation methods. Figure 1 , Figure 2 and Figure 4 As shown, the second region 320 of this application embodiment includes a second upper region 321 and a second lower region 322 symmetrically distributed along a second direction. Both the second upper region 321 and the second lower region 322 are provided with a second heat exchange channel 334, and the second heat exchange channels 334 in the second upper region 321 and the second lower region 322 are symmetrically distributed.

[0080] Furthermore, the second upper region 321 and the second lower region 322 are symmetrically distributed along the second direction in the second region 320, and the second heat exchange channels 334 in the second upper region 321 and the second lower region 322 are symmetrically distributed. The first region 310 is also symmetrically arranged, so that the overall temperature distribution of the battery pack 100 is symmetrically distributed along the second direction, and the temperature on both sides of the battery pack 100 along the second direction is consistent. This ensures that the temperature detection units 200 set on both sides of the battery pack 100 along the second direction can detect the lowest temperature of the battery pack 100, further improving the accuracy of the temperature detection units 200.

[0081] Furthermore, setting both the first region 310 and the second region 320 as symmetrical structures helps to simplify the layout of the cold plate flow channel and makes it easier to optimize the layout of the cold plate flow channel.

[0082] See also some of the possible implementation methods. Figure 1 , Figure 2 and Figure 4As shown, the first heat exchange channel 333 in this embodiment includes a first converging channel 3331 and a plurality of first primary branches 3332 arranged in parallel. One end of the first converging channel 3331 is connected to the inlet channel 331, and one end of each of the plurality of first primary branches 3332 is connected to the first converging channel 3331. The other ends are converged and connected to the outlet channel 332.

[0083] In some embodiments, multiple first-level branches 3332 are provided to transport the refrigerant in the first converging channel 3331 to the multiple first-level branches 3332 arranged in parallel. This allows the refrigerant to flow through multiple first-level branches 3332 at the same time, improving the heat transfer efficiency. It also helps to improve the uniformity of the arrangement of the first heat exchange channels 333 in the first region 310, thereby reducing the temperature difference between different parts of the battery pack 100 after the heat exchange plate 300 has been heated or cooled once, making the overall temperature distribution of the battery pack 100 more uniform, and thus improving the performance of the battery pack.

[0084] See also some of the possible implementation methods. Figure 1 , Figure 2 and Figure 4 As shown, each first primary branch 3332 in this embodiment includes a first branch point 3332a and a first converging point 3332b. Each first primary branch 3332 is divided into multiple first secondary branches 3332c connected in parallel at the first branch point 3332a. The multiple first secondary branches 3332c are converged at the first converging point 3332b and then connected to the outlet flow channel 332. The first branch point 3332a and the first converging point 3332b are both located at the bends of the first primary branch 3332 in the first direction.

[0085] In this way, each primary branch 3332 is divided into multiple secondary branches 3332c connected in parallel at the first branch point 3332a. The main body of the primary and secondary branches 3332c extends along the first direction, which can make the primary heat exchange channel 333 more evenly distributed in the primary region 310, ensuring that the primary heat exchange channel 333 covers the primary region 310, further improving the overall temperature uniformity of the battery pack 100, and making the battery pack operate more safely and stably. At the same time, the multiple primary and secondary branches 3332c are connected to the outlet channel 332 after being converged at the first convergence point 3332b, which can allow the refrigerant to be discharged through the outlet channel 332 in a timely manner after a large amount of heat transfer to complete the heating or replace the refrigerant with a new one with a higher temperature, thereby improving the working efficiency of the heat exchange plate 300.

[0086] The specific number of the first primary branch 3332 and the first secondary branch 3332c can be determined according to the size of the heat exchange plate 300 and the area covered by the first region 310. This application embodiment does not impose any restrictions. In order to ensure the uniformity of heating of the battery pack 100, the first secondary branch 3332c can also be set at equal intervals.

[0087] See also some of the possible implementation methods. Figure 1 , Figure 2 and Figure 4 As shown, the second heat exchange channel 334 in this embodiment includes a plurality of second converging channels 3341 connected in parallel. Each second converging channel 3341 includes a second branch point 3341a and a second converging point 3341b. Each second converging channel 3341 is divided into a plurality of second primary branches 3342 connected in parallel at the second branch point 3341a. The plurality of second primary branches 3342 are converged at the second converging point 3341b and then connected to the outlet channel 332.

[0088] In a specific implementation, the second converging flow channel 3341 extends from the first region 310 to the second region 320. Each second converging flow channel 3341 is provided with at least one second branch point 3341a and a second converging point 3341b in the second region 320. Each second branch point 3341a branches out multiple parallel second primary branches 3342. The specific number of the second converging flow channel 3341, the second branch point 3341a, the second converging point 3341b, and the second primary branch 3342 can be adjusted according to the size of the heat exchange plate 300 and the area covered by the second region 320. This application embodiment does not limit this, as long as it can ensure that the second primary branches 3342 uniformly cover the second region 320.

[0089] Furthermore, the refrigerant in each of the second-level branches 3342 can simultaneously transfer heat to the battery pack 100, improving heating efficiency. After the refrigerant transfers a certain amount of heat, its temperature drops, resulting in poor heat transfer. Finally, the low-temperature refrigerant in each of the second-level branches 3342 flows into the outlet channel 332 through the second collection point 3341b and exits the heat exchange plate 300 through the outlet channel 332. This allows the low-temperature refrigerant to exit the heat exchange plate 300 through the same channel, reducing the area through which the low-temperature refrigerant flows. This ensures that the area of ​​the battery pack 100 is effectively heated while ensuring that the temperature detected by the temperature detection unit 200 is the lowest temperature of the battery pack 100.

[0090] See also some of the possible implementation methods. Figure 1 , Figure 2 and Figure 4As shown, the embodiment of this application also includes a third heat exchange channel 335, which is arranged in parallel between the first heat exchange channel 333 and the second heat exchange channel 334. The third heat exchange channel 335 is coiled in the second region 320, and the end of the third heat exchange channel 335 is connected to the first primary branch 3332 downstream of the first aggregation point 3332b.

[0091] It is understandable that, since both the inlet channel 331 and the outlet channel 332 are located at the end of the first region 310 away from the second region 320 along the first direction, the refrigerant used to heat the second region 320 must first be heated in the first region 310 before flowing to the second region 320. When the refrigerant passes through the first region 310, it will first transfer some heat to the battery cell 110 covered by the first region 310. Therefore, the amount of refrigerant used to heat the first region 310 should be less than the amount of refrigerant used to heat the second region 320, and the area covered by the first heat exchange channel 333 should be smaller than the area covered by the cold plate channel in the second region 320, so as to ensure that the battery cell 110 covered by the first region 310 and the second region 320 are heated evenly and improve the uniformity of the temperature distribution of the battery pack 100.

[0092] Therefore, a third heat exchange channel 335 is provided, extending from the first region 310 to the second region 320 and coiling within it. This increases the number of cold plate channels heating the second region 320, ensuring its heating efficiency. Simultaneously, the third heat exchange channel 335 is connected to the first primary branch 3332 downstream of the first collection point 3332b, allowing the refrigerant in the third heat exchange channel 335 to flow out together with the refrigerant in the first heat exchange channel 333. Since both the first and third heat exchange channels 333 and 335 are shorter than the second heat exchange channel 334, the refrigerant temperature in the third channel 335 is higher than that in the second heat exchange channel 334. Therefore, the refrigerant in the third heat exchange channel 335 and the refrigerant in the first heat exchange channel 333 are discharged together, which can ensure that the refrigerant temperature in the cold plate channels near both sides of the battery pack 100 is the lowest, and ensure that the temperature detected by the temperature detection unit 200 is the lowest temperature of the battery pack 100. On the other hand, the refrigerant in the first heat exchange channel 333 and the third heat exchange channel 335 is less than that in the second heat exchange channel 334, so that the refrigerant in the third heat exchange channel 335 and the refrigerant in the first heat exchange channel 333 are discharged together, and the refrigerant in the second heat exchange channel 334 is discharged separately, which can improve the efficiency of refrigerant discharge from the heat exchange plate 300 and ensure that the refrigerant in each heat exchange channel 330 is basically emptied at the same time.

[0093] See also some of the possible implementation methods. Figures 1 to 6As shown, the embodiments of this application also include: a first structural beam 410 and a second structural beam 430, the first structural beam 410 and the second structural beam 430 are located at both ends of the battery pack 100 along the first direction, and the outlet flow channel 332 is located on the side of the first structural beam 410 away from the battery pack 100.

[0094] See also some of the possible implementation methods. Figures 1 to 6 As shown, the embodiment of this application also includes a third structural beam 420. Along the first direction, the third structural beam 420 is disposed between the first structural beam 410 and the second structural beam 430 and divides the heat exchange plate 300 into a first region 310 and a second region 320. A portion of the plurality of battery cells 110 is disposed in the first region 310 and another portion is disposed in the second region 320.

[0095] It should be noted that the first structural beam 410 and the second structural beam 430 are both set on the housing 400 that forms the battery pack. The first structural beam 410, the third structural beam 420 and the second structural beam 430 can all be set as expansion beams. Setting the first structural beam 410, the third structural beam 420 and the second structural beam 430 inside the housing 400 can fix and position the battery cells 110, ensuring the normal operation and safe operation of the battery pack. The arrangement of the battery cells 110 in the battery pack 100 inside the housing 400 is affected by the positions of the first structural beam 410, the third structural beam 420, and the second structural beam 430. Some cells 110 are concentrated between the first structural beam 410 and the third structural beam 420, while some cells 110 are concentrated between the third structural beam 420 and the second structural beam 430. Therefore, in order to ensure the heating or cooling efficiency of the heat exchange plate 300, the first region 310 and the second region 320 on the heat exchange plate 300 also need to be divided according to the positions of the first structural beam 410, the third structural beam 420, and the second structural beam 430. The part corresponding to the first structural beam 410 to the third structural beam 420 is the first region 310, and the part corresponding to the third structural beam 420 to the second structural beam 430 is the second region 320. This ensures that the first region 310 and the second region 320 of the heat exchange plate 300 completely cover all the cells 110 in the battery pack 100, thus guaranteeing the heating or cooling efficiency of the heat exchange plate 300.

[0096] In some embodiments, the inlet channel 331 and the outlet channel 332 can both be located on the side of the first structural beam 410 away from the first region 310. This ensures that the heat exchange channel 330 covers the entire area of ​​the battery cold plate 300, and facilitates the connection of the inlet channel 331 and the outlet channel 332 with the refrigerant supply device outside the battery pack, such as an air conditioning system, thus avoiding the first structural beam 410 affecting the stability of the connection. In some embodiments, the portion of the first heat exchange channel 333 adjacent to the inlet channel 331 and the outlet channel 332 is located on the side of the first structural beam 410 away from the first region 310; and / or, the portion of the second heat exchange channel 334 adjacent to the inlet channel 331 and the outlet channel 332 is located on the side of the first structural beam 410 away from the first region 310.

[0097] Furthermore, since both the inlet channel 331 and the outlet channel 332 are located on the side of the first structural beam 410 facing away from the first region 310, the portion of the first heat exchange channel 333 and the second heat exchange channel 334 adjacent to the outlet channel 332 is the part with the lowest refrigerant temperature and the worst heating effect within the first heat exchange channel 333 and the second heat exchange channel 334. Positioning this portion on the side of the first structural beam 410 facing away from the first region 310 ensures that the part with the lowest refrigerant temperature in the cold plate channel is located outside the battery pack 100, guaranteeing the basic temperature of the refrigerant covering the battery pack 100 and improving the heating efficiency of the heat exchange plate 300 on the battery pack 100. Simultaneously, it also prevents the temperature on the side of the battery pack 100 closest to the first structural beam 410 from being lower than the temperature on both sides of the battery pack 100 along the second direction, ensuring that the two sides of the battery pack 100 along the second direction are the parts with the lowest temperature, and ensuring that the temperature detection unit 200 can measure the lowest temperature of the battery pack 100.

[0098] Similarly, placing the portion of the first heat exchange channel 333 and the second heat exchange channel 334 adjacent to the inlet channel 331 on the side of the first structural beam 410 away from the first region 310 can play a certain transition role. After injecting a certain amount of high-temperature refrigerant into the first heat exchange channel 333 and the second heat exchange channel 334, the refrigerant can enter the first region 310. This can ensure the uniform flow of the refrigerant to a certain extent and improve the uniform heating of the battery pack 100.

[0099] See also some of the possible implementation methods. Figure 1 , Figure 2 and Figure 3 As shown, the embodiment of this application also includes: a control unit (not shown in the figure), which is connected to the temperature detection unit 200. The control unit controls the charging and discharging state of the battery pack 100 according to the temperature information of the battery pack 100 detected by the temperature detection unit 200.

[0100] Specifically, due to the large overall size of the battery pack 100, the temperature detection unit 200 includes multiple temperature sensors 210, which are spaced apart on the battery pack 100. Each temperature sensor 210 is used to detect the temperature of a portion of the battery cells 110. The control unit can be configured to receive the temperature detected by each temperature sensor 210, determine the minimum value as the lowest temperature, or the maximum value as the highest temperature, and adjust the charging and discharging current of the battery pack 100 according to the lowest and highest temperatures to fully utilize the performance of the battery pack. The control unit can also be configured to calculate the average value of the temperatures detected by all temperature sensors 210, and determine the average value as the lowest or highest temperature to reduce the detection error of each temperature sensor 210 and improve the accuracy of the temperature detection unit 200. The control unit can control the fully charged state of the battery pack 100 according to the temperature information. This application embodiment does not limit the specific operating mode of the control unit, as long as it can reasonably determine the lowest or highest temperature of the battery pack 100 and control it according to the temperature information.

[0101] See also some possible implementations. Figure 1 and Figure 3 As shown, in this embodiment of the application, a plurality of temperature sensors 210 are distributed at intervals along a first direction, and at least one of the plurality of temperature sensors 210 is used to detect the temperature of the cell 110 that is closest to the outlet flow channel 332.

[0102] It is understandable that the temperature of the refrigerant gradually changes in the heat exchange channel 330. When heating the battery pack, the temperature of the refrigerant is lower in the portion of the heat exchange channel 330 closer to the outlet channel 332. Therefore, the temperature of the cell 110 closest to the outlet channel 332 is lower than that of the other cells 110 in the battery pack 100. Therefore, at least one temperature sensor 210 is provided to detect the temperature of the cell 110 closest to the outlet channel 332, allowing the detection of the lowest-temperature cell 110 in the battery pack 100. Similarly, when cooling the battery pack, the temperature of the highest-temperature cell 110 in the battery pack 100 can be detected more accurately. This will not be elaborated further here. This helps improve the accuracy of the obtained temperature information, making the battery pack operate more safely and stably.

[0103] This application also provides an electrical device including any of the battery packs described above.

[0104] The structure and working principle of the battery pack have been described in detail in the above embodiments, and will not be repeated here.

[0105] In this embodiment of the application, the battery pack is provided in the power supply settings, which can enable the battery pack to perform better, thereby improving the user experience of the electrical equipment and extending the service life of the electrical equipment.

[0106] See also some of the possible implementation methods. Figure 1 and Figure 4 As shown, the embodiments of this application also include: an air conditioning system (not shown in the figure), the air conditioning system is connected to the heat exchange plate 300, and the heat exchange plate 300 can constitute the heat exchanger of the air conditioning system.

[0107] In practical implementation, a compressor can be installed in the air conditioning system. When the air conditioning system is turned on for heating, the refrigerant is at a high temperature and is in a gaseous state. The refrigerant is compressed into the heat exchange plate 300 by the compressor. As the refrigerant is transported along the cold plate channel, it continuously transfers heat to the battery cell 110. When the battery pack 100 is at a low temperature, the refrigerant will condense into a liquid and continue to flow along the cold plate channel while continuing to heat the battery pack 100. Finally, the refrigerant with a lower temperature flows out of the heat exchange plate 300 and returns to the air conditioning system for use in the next heating or cooling cycle.

[0108] The air conditioning system can be set to automatically heat or cool the battery pack 100 according to the temperature of the battery pack, or it can be set to allow manual control of the air conditioning system to be turned on and off. This application embodiment does not limit the specific working mode of the air conditioning system.

[0109] In summary, the battery pack and electrical equipment provided in this application embodiment include a battery pack 100, a temperature detection unit 200, and a heat exchange plate 300. The heat exchange plate 300 can be used for heating or cooling the battery pack. When used for heating, the operating parameters of the battery pack are adjusted by detecting the lowest temperature of the battery pack 100; when used for cooling, the operating parameters of the battery pack are adjusted by detecting the highest temperature of the battery pack 100. The principles are the same in heating and cooling modes. Therefore, the heating of the battery pack is used as an example for explanation. The battery pack 100 includes multiple battery cells 110 arranged along a first direction. The temperature detection unit 200 is located on both sides of the battery pack 100 along a second direction. The heat exchange plate 300 has an inlet channel 331, an outlet channel 332, and a heat exchange channel 330. The heat exchange channel 330 includes a first heat exchange channel 333 and a second heat exchange channel 334. The first heat exchange channel 333 and the second heat exchange channel 334 are respectively coiled around the first region 310 and the second region 320 of the heat exchange plate 300. The inlet channel 331 and the outlet channel 332 are located at the end of the first region 310 away from the second region 320 along the first direction. The two ends of the first heat exchange channel 333 are connected to the inlet channel 331 and the outlet channel 332 respectively. The two ends of the second heat exchange channel 334 pass through the first region 310 and are connected to the inlet channel 331 and the outlet channel 332. The part of the second heat exchange channel 334 connected to the outlet channel 332 passes through the first region 310 and is located outside the first heat exchange channel 333.

[0110] In this way, when the heat exchange plate 300 starts to heat the battery pack 100, the portion of the refrigerant flowing through the second heat exchange channel 334 connected to the outlet channel 332 has the longest flow length and transfers the most heat, thus having the lowest temperature. Consequently, the temperature of the battery cells 110 near this portion of the battery pack 100 is the lowest, meaning the temperature of both sides of the battery pack 100 along the second direction is the lowest. Therefore, the temperature detection unit 200 can more accurately detect the lowest temperature of the battery pack 100, so that the control unit can control the charging and discharging state of the battery pack 100 based on the lowest temperature, providing the accuracy of the control unit's regulation, ensuring that the battery pack fully performs its function, and effectively extending its service life.

[0111] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0112] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0113] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0114] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0115] The term "multiple" in this article refers to two or more. The term "and / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone.

[0116] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0117] It is understood that, in the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0118] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0119] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery pack, characterized in that, include: The battery pack (100) includes a plurality of cells (110) arranged side by side along a first direction. A temperature detection unit (200) is disposed at one end of the battery pack (100) along the second direction, and the temperature detection unit (200) is used to detect the temperature of the battery cell (110); The heat exchange plate (300) includes a heat exchange channel (330), an inlet channel (331) and an outlet channel (332). The two ends of the heat exchange channel (330) are connected to the inlet channel (331) and the outlet channel (332) respectively. The heat exchange channel (330) flows through the end of the battery pack (100) where the temperature detection unit (200) is located. The outlet channel (332) is located outside the battery pack (100). The first direction and the second direction intersect.

2. The battery pack according to claim 1, characterized in that, The outlet channel (332) is located on one side of the battery pack (100) along the first direction.

3. The battery pack according to claim 2, characterized in that, The inlet channel (331) and the outlet channel (332) are located on the same side of the battery pack (100) along the first direction.

4. The battery pack according to claim 1, characterized in that, The inlet channel (331) has an inlet (3311), and the outlet channel (332) has an outlet (3321). The inlet (3311) and the outlet (3321) are arranged adjacent to each other. There are two outlet channels (332). The inlet channel (331) is located between the two outlet channels (332). The inlet channel (331) extends along the first direction, and the outlet channel (332) extends along the second direction.

5. The battery pack according to claim 1, characterized in that, The heat exchange plate includes a first region (310) and a second region (320) arranged along a first direction, and the heat exchange channel (330) includes a first heat exchange channel (333) and a second heat exchange channel (334), wherein the inlet channel (331) and the outlet channel (332) are located at the end of the first region (310) along the first direction away from the second region (320). The first heat exchange channel (333) is coiled around the first region (310). The two ends of the first heat exchange channel (333) are respectively connected to the inlet channel (331) and the outlet channel (332). The second heat exchange channel (334) is coiled around the second region (320). The two ends of the second heat exchange channel (334) extend through the first region (310) to be connected to the inlet channel (331) and the outlet channel (332) respectively. The portion of the second heat exchange channel (334) that passes through the first region (310) is located outside the first heat exchange channel (333).

6. The battery pack according to claim 5, characterized in that, The first region (310) includes a first upper region (311) and a first lower region (312) symmetrically distributed along the second direction. Both the first upper region (311) and the first lower region (312) are provided with the first heat exchange channel (333), and the first heat exchange channels (333) in the first upper region (311) and the first lower region (312) are symmetrically distributed.

7. The battery pack according to claim 5, characterized in that, The second region (320) includes a second upper region (321) and a second lower region (322) that are symmetrically distributed along the second direction. The second upper region (321) and the second lower region (322) are both provided with the second heat exchange channel (334), and the second heat exchange channel (334) in the second upper region (321) and the second lower region (322) are symmetrically distributed.

8. The battery pack according to any one of claims 5-7, characterized in that, The first heat exchange channel (333) includes a first converging channel (3331) and multiple first-level branches (3332) arranged in parallel. Among them, one end of the first converging channel (3331) is connected to the inlet channel (331), and one end of each of the multiple first-level branches (3332) is connected to the first converging channel (3331), and the other end is converged and connected to the outlet channel (332).

9. The battery pack according to claim 8, characterized in that, Each of the first-level branches (3332) includes a first branch point (3332a) and a first converging point (3332b). Each of the first-level branches (3332) is divided into multiple parallel first-level branches (3332c) at the first branch point (3332a). The multiple first-level branches (3332c) converge at the first converging point (3332b) and then connect to the outlet channel (332). The first branch point (3332a) and the first converging point (3332b) are both located at the bends of the first-level branches (3332) in the first direction.

10. The battery pack according to any one of claims 5-7, characterized in that, The second heat exchange channel (334) includes a plurality of second converging channels (3341) connected in parallel. Each second converging channel (3341) includes a second branch point (3341a) and a second converging point (3341b). Each second converging channel (3341) is divided into a plurality of second primary branches (3342) connected in parallel at the second branch point (3341a). The plurality of second primary branches (3342) are converged at the second converging point (3341b) and then connected to the outlet channel (332).

11. The battery pack according to claim 9, characterized in that, It also includes a third heat exchange channel (335), which is arranged in parallel between the first heat exchange channel (333) and the second heat exchange channel (334). The third heat exchange channel (335) is coiled in the second region (320), and the end of the third heat exchange channel (335) is connected to the first primary branch (3332) downstream of the first aggregation point (3332b).

12. The battery pack according to any one of claims 1-7, characterized in that, Also includes: The first structural beam (410) and the second structural beam (430) are located at both ends of the battery pack (100) along the first direction, and the outlet channel (332) is located on the side of the first structural beam (410) away from the battery pack (100).

13. The battery pack according to claim 12, characterized in that, It also includes a third structural beam (420) along the first direction, the third structural beam (420) is disposed between the first structural beam (410) and the second structural beam (430) and divides the heat exchange plate (300) into a first region (310) and a second region (320), a portion of the plurality of battery cells (110) is disposed in the first region (310) and another portion is disposed in the second region (320).

14. The battery pack according to any one of claims 1-7, characterized in that, The temperature detection unit (200) includes a plurality of temperature sensors (210) spaced apart along a first direction, at least one of the plurality of temperature sensors (210) being used to detect the temperature of the cell (110) closest to the outlet channel (332).

15. The battery pack according to any one of claims 1-7, characterized in that, Also includes: The control unit is connected to the temperature detection unit (200), and the control unit controls the charging and discharging state of the battery pack (100) according to the temperature information of the battery pack (100) detected by the temperature detection unit (200).

16. An electrical appliance, characterized in that, include: The battery pack according to any one of claims 1-15.

17. The electrical equipment according to claim 16, characterized in that, Also includes: An air conditioning system, which is connected to the heat exchange plate (300).

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