Battery temperature control system, battery pack and battery

Abstract

The invention relates to a battery temperature control system, a battery pack and a battery. The battery temperature control system comprises a heat exchange pipeline (300) and two layers of heat exchange units (100) arranged at intervals, a containing space (1a) used for containing a battery cell (200) is formed between the two layers of heat exchange units (100), and the two ends of each layer of heat exchange unit (100) are provided with a heat exchange unit liquid inlet (101) and a heat exchange unit liquid outlet (102) respectively; the heat exchange pipeline (300) comprises a liquid inlet pipe (301) and a liquid outlet pipe (302), the liquid inlet pipe (301) is communicated with the heat exchange unit liquid inlets (101) of the two layers of heat exchange units (100), and the liquid outlet pipe (302) is communicated with the heat exchange unit liquid outlets (102) of the two layers of heat exchange units (100); the heat exchange unit liquid inlet (101) and the heat exchange unit liquid outlet (102) of one layer of heat exchange unit (100) are arranged in opposite directions to the heat exchange unit liquid inlet (101) and the heat exchange unit liquid outlet (102) of the other layer of heat exchange unit (100), so that heat exchange media in the two layers of heat exchange units (100) flow in opposite directions.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery temperature control system, a battery pack, and a battery. Background Art

[0002] With the development of the new energy industry, market requirements for power batteries continue to increase, with high capacity and fast charging becoming the mainstream. This is accompanied by an increase in the number of modules in the battery pack and an increase in charging current, which places more stringent requirements on the battery thermal management system.

[0003] The cooling / heating performance and temperature uniformity of battery cells and modules are key to ensuring the stability and safety of battery packs. In related technologies, battery thermal management liquid cooling / heating systems typically use single-sided cooling solutions for battery cells, or double-sided cooling solutions with series-connected cold plates. However, these cooling solutions can easily lead to problems such as uneven cooling between cells and modules and large temperature differences between different areas. This is especially true when there are many modules in a battery pack or when the charge rate is high. This can cause degradation in cell and module performance, impacting the battery pack's service life.

[0004] It should be noted that the information disclosed in the background technology section of this disclosure is only intended to increase understanding of the overall background of this disclosure, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to those skilled in the art. Summary of the Invention

[0005] The present disclosure provides a battery temperature control system, a battery pack, and a battery.

[0006] According to one aspect of the present disclosure, a battery temperature control system is provided, comprising:

[0007] Two layers of heat exchange units are arranged at intervals, with an accommodation space for accommodating battery cells formed between the two layers of heat exchange units, and a heat exchange unit liquid inlet and a heat exchange unit liquid outlet are respectively provided at both ends of each layer of heat exchange units; and

[0008] The heat exchange pipe includes a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe is respectively connected to the liquid inlets of the heat exchange units of the two layers to input heat exchange medium into the two layers of heat exchange units, and the liquid outlet pipe is respectively connected to the liquid outlets of the heat exchange units of the two layers of heat exchange units to discharge heat exchange medium from the two layers of heat exchange units;

[0009] The heat exchange unit liquid inlet and outlet of one layer of heat exchange units are arranged in the opposite direction to the heat exchange unit liquid inlet and outlet of another layer of heat exchange units, so that the heat exchange medium in the two layers of heat exchange units flows in the opposite direction.

[0010] In some embodiments, the battery temperature control system further includes a circulation device, which is used to input heat exchange medium into the liquid inlet pipe and to receive the heat exchange medium discharged from the liquid outlet pipe.

[0011] Wherein, the liquid inlet pipe is provided with only one liquid inlet pipe in communication with the circulation device; and / or

[0012] The liquid outlet pipe is only provided with a liquid outlet pipe outlet communicated with the circulation device.

[0013] In some embodiments, the heat exchange unit liquid inlets and heat exchange unit liquid outlets of the two layers of heat exchange units are both arranged on the same side of the two layers of heat exchange units; and / or

[0014] The liquid inlet pipe and the liquid outlet pipe are both arranged on the same side of the two-layer heat exchange unit.

[0015] In some embodiments, each layer of heat exchange units includes at least two heat exchange plates arranged at intervals. Two heat exchange plates at corresponding positions in the two layers of heat exchange units constitute a heat exchange module. A subspace of the accommodation space is formed between the two heat exchange plates in the heat exchange module. The subspace is used to accommodate a battery cell module. The battery cell module is composed of some battery cells accommodated in the accommodation space where the subspace is located.

[0016] The battery temperature control system also includes a connecting pipeline, which is used to connect the heat exchange pipelines in at least two heat exchange plates located in two layers of heat exchange units in at least two heat exchange modules.

[0017] In some embodiments, a heat exchange plate liquid inlet and a heat exchange plate liquid outlet are respectively provided at both ends of each heat exchange plate, and the connecting pipeline includes an inlet pipeline and an outlet pipeline that are interconnected. The inlet pipeline is respectively connected to the heat exchange plate liquid inlets of the two heat exchange plates located in the two-layer heat exchange unit and in the two heat exchange modules, and the outlet pipeline is respectively connected to the heat exchange plate liquid outlets of the two heat exchange plates located in the two-layer heat exchange unit and in the two heat exchange modules.

[0018] In some embodiments, among two adjacent heat exchange plates in each layer of heat exchange units, the heat exchange plate liquid inlet and the heat exchange plate liquid outlet of one heat exchange plate are arranged in the same direction as the heat exchange plate liquid inlet and the heat exchange plate liquid outlet of the other heat exchange plate and are both located on the same side of the two layers of heat exchange units; and / or

[0019] In each heat exchange module, the heat exchange plate liquid inlet and the heat exchange plate liquid outlet of one heat exchange plate are arranged in the opposite direction to the heat exchange plate liquid inlet and the heat exchange plate liquid outlet of another heat exchange plate; and / or

[0020] The heat exchange plate liquid inlet of the heat exchange plate located at the end of the heat exchange unit constitutes the heat exchange unit liquid inlet of the heat exchange unit in which it is located, or is closer to the heat exchange unit liquid inlet of the heat exchange unit in which it is located than the heat exchange plate liquid outlet; the heat exchange plate liquid outlet of the heat exchange plate located at the end of the heat exchange unit constitutes the heat exchange unit liquid outlet of the heat exchange unit in which it is located, or is closer to the heat exchange unit liquid outlet of the heat exchange unit in which it is located than the heat exchange plate liquid inlet; and / or

[0021] The inlet pipe and the outlet pipe are arranged on the same side of the two-layer heat exchange unit.

[0022] In some embodiments, the inlet pipeline includes two inlet branches, which are respectively connected to the liquid inlets of the two heat exchange plates located in the two-layer heat exchange unit and in the two heat exchange modules.

[0023] The outlet pipeline includes two outlet branches, which are respectively connected to the liquid outlets of the two heat exchange plates located in the two layers of heat exchange units and in the two heat exchange modules.

[0024] The connecting pipeline also includes a four-way valve, the four valve ports of which are respectively connected to the two inlet branches and the two outlet branches to receive the heat exchange medium output by the two outlet branches from the two heat exchange plate liquid outlets, and transport the received heat exchange medium to the two heat exchange plate liquid inlets through the two inlet branches.

[0025] According to another aspect of the present disclosure, a battery pack is provided, comprising the battery temperature control system described above and a plurality of battery cells, wherein the battery temperature control system is configured to cool the plurality of battery cells;

[0026] Among them, the two layers of heat exchange units of the battery temperature control system are arranged on opposite sides of multiple battery cells.

[0027] In some embodiments, the plurality of battery cells constitute at least two battery cell modules that are spaced apart.

[0028] According to yet another aspect of the present disclosure, a battery is provided, comprising at least two of the above-mentioned battery packs, wherein the at least two battery packs are stacked.

[0029] Based on the above technical solution, the present disclosure provides a battery temperature control system with two layers of heat exchange units. The heat exchange unit liquid inlet and outlet of one layer of heat exchange units are arranged in opposite directions to the heat exchange unit liquid inlet and outlet of the other layer of heat exchange units. This allows the heat exchange medium in the two layers of heat exchange units to flow in opposite directions, thereby achieving a more balanced heat exchange effect. This helps to reduce the temperature difference between different areas of the battery cells or battery cell modules arranged between the two layers of heat exchange units, thereby ensuring the reliability and efficiency of battery operation. In addition, by providing liquid inlet pipes to input heat exchange medium to the two layers of heat exchange units respectively, the heat exchange medium input to the two layers of heat exchange units has a substantially consistent temperature, thereby further improving the temperature balance of the two layers of heat exchange units and improving the thermal management effect on the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The exemplary embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0031] Figure 1 A schematic diagram of the internal structure of a battery pack in some embodiments of the present disclosure is shown.

[0032] Figure 2 A schematic structural diagram of heat exchange pipes and connecting pipelines in some embodiments of the present disclosure is shown.

[0033] Figure 3 A schematic diagram of the arrangement of heat exchange pipes, connecting pipes and circulation devices in some embodiments of the present disclosure is shown.

[0034] Figure 4 A schematic structural diagram of a battery temperature control system in some embodiments of the present disclosure is shown.

[0035] Figure 5 A schematic structural diagram of connecting pipelines in some embodiments of the present disclosure is shown.

[0036] Figure 6 A schematic structural diagram of a heat exchange module in some embodiments of the present disclosure is shown.

[0037] Figure 7 A schematic structural diagram of a four-way valve in some embodiments of the present disclosure is shown.

[0038] Figure 8 Shown Figure 7 Cross-sectional view of the four-way valve. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0040] In the description of the present disclosure, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present disclosure.

[0041] Battery thermal management liquid cooling / liquid heating systems in related technologies usually adopt a single-sided cooling solution for battery cells, or a double-sided cooling solution with cold plates in series. However, these cooling solutions have disadvantages such as uneven cooling in different areas and large differences in cooling effects. Especially when cooling large battery packs in passenger cars and engineering vehicles, it is easy to cause poor cooling effects on battery cells and modules, thereby affecting the working reliability and safety of the battery pack.

[0042] To address the above situation, the present disclosure provides a battery temperature control system for improving thermal management of batteries, particularly those used in engineering vehicles. A battery may include one or more battery packs, each containing one or more battery cells, which may be combined into one or more battery modules.

[0043] It is understood that the battery temperature control system according to the embodiments of the present disclosure can not only be used to cool the battery during thermal management, but can also be used to increase the battery temperature when necessary (for example, in low-temperature environments). In specific application scenarios, the battery temperature control system of the present disclosure can be used to cool or increase the battery temperature by simply adjusting the temperature of the heat exchange medium.

[0044] refer to Figure 1 and Figure 2 As shown, in some embodiments provided by the present disclosure, the battery temperature control system includes a heat exchange pipe 300 and two layers of heat exchange units 100 arranged at intervals. An accommodating space 1a for accommodating the battery cell 200 is formed between the two layers of heat exchange units 100. A heat exchange unit liquid inlet 101 and a heat exchange unit liquid outlet 102 are respectively provided at both ends of each layer of heat exchange unit 100. The heat exchange pipe 300 includes a liquid inlet pipe 301 and a liquid outlet pipe 302. The liquid inlet pipe 301 is respectively connected to the heat exchange unit liquid inlets 101 of the two layers of heat exchange units 100 to input heat exchange medium into the two layers of heat exchange units 100. The liquid outlet pipe 302 is respectively connected to the heat exchange unit liquid outlet 102 of the two layers of heat exchange units 100 to discharge heat exchange medium from the two layers of heat exchange units 100. The heat exchange unit liquid inlet 101 and the heat exchange unit liquid outlet 102 of one layer of heat exchange unit 100 are arranged in the opposite direction to the heat exchange unit liquid inlet 101 and the heat exchange unit liquid outlet 102 of another layer of heat exchange unit 100, so that the heat exchange medium in the two layers of heat exchange units 100 flows in the opposite direction.

[0045] Here, the reverse setting may refer to a reverse setting in a certain direction, or a reverse setting in multiple directions.

[0046] exist Figure 1 、 Figure 4 and Figure 6 , the three directions x, y, and z are shown. The three directions x, y, and z can represent any three intersecting directions in a battery or battery pack, such as three directions perpendicular to each other.

[0047] In the following embodiments, the x-direction is the width of the battery pack, the y-direction is the thickness of the battery pack, and the z-direction is the height of the battery pack. Hereinafter, the x-direction may also be expressed as left or right, the y-direction may also be expressed as front or back, and the z-direction may also be expressed as up or down.

[0048] refer to Figure 1 As shown, as some implementations, the heat exchange unit liquid inlet 101 and the heat exchange unit liquid outlet 102 of one layer of heat exchange unit 100 are arranged in the opposite direction along the x direction shown in the figure to the heat exchange unit liquid inlet 101 and the heat exchange unit liquid outlet 102 of another layer of heat exchange unit 100.

[0049] Next, the arrangement of the heat exchange unit liquid inlet 101 and the heat exchange unit liquid outlet 102 in each layer of the heat exchange unit 100 will be described in detail.

[0050] like Figure 1 The heat exchange unit 100 located at the upper layer has its heat exchange unit liquid inlet 101 located at its right end and its heat exchange unit liquid outlet 102 located at its left end. Figure 1 In the lower heat exchange unit 100, its heat exchange unit liquid inlet 101 is located at its left end, and its heat exchange unit liquid outlet 102 is located at its right end. Therefore, in the x-direction, the heat exchange medium in the upper heat exchange unit 100 flows from the right end to the left end of the heat exchange unit 100, while the heat exchange medium in the lower heat exchange unit 100 flows from the left end to the right end of the heat exchange unit 100.

[0051] Continue to refer Figure 1 As some implementations, the heat exchange unit inlets 101 and outlets 102 of one heat exchange unit 100 can be arranged opposite to the heat exchange unit inlets 101 and outlets 102 of another heat exchange unit 100 along the z-direction shown in the figure. Specifically, the heat exchange unit inlets 101 of the lower heat exchange unit 100 are located below the outlets 102 of the upper heat exchange unit 100, and the heat exchange unit outlets 102 of the lower heat exchange unit 100 are located below the inlet 101 of the upper heat exchange unit 100. Thus, along the height of the battery pack, corresponding locations on both sides of the battery cell 200 (the upper and lower sides in the figure) exchange heat with the heat exchange unit inlets 101 and outlets 102 of the two heat exchange units 100, respectively.

[0052] Furthermore, by providing a liquid inlet pipe 301 to supply heat exchange medium to the heat exchange unit inlets 101 of the two layers of heat exchange units 100, the heat exchange medium supplied to the two layers of heat exchange units 100 can be ensured to have a substantially uniform temperature. Furthermore, based on the aforementioned arrangement of the heat exchange unit inlet 101 and heat exchange unit outlet 102 of one layer of heat exchange units 100 in opposite directions from the heat exchange unit inlet 101 and heat exchange unit outlet 102 of the other layer of heat exchange units 100, at least in the width direction of the battery pack, the corresponding positions of the two heat exchange units 100 that contact each other at different locations on either side of the battery pack can experience substantially opposite temperature trends. This allows the battery temperature control system to uniformly control the temperature of the battery pack at least in the x-direction, ensuring that the multiple battery cells 200 arranged along the width of the battery pack maintain relatively uniform temperatures. For example, specifically, it helps to avoid the problem of uneven temperature distribution in different areas of the battery pack caused by heat exchange between both sides of the same position of the battery pack with a higher temperature heat exchange medium or with a lower temperature heat exchange medium as in the related art, especially the problem of increasing temperature due to heat accumulation along the flow direction of the heat exchange medium.

[0053] In the above embodiment, if Figure 1 As shown, a liquid inlet pipe 301 is provided to input heat exchange medium to the two layers of heat exchange units 100 respectively, and a liquid outlet pipe 302 is provided to discharge heat exchange medium from the two layers of heat exchange units 100 respectively. Compared with the solution of providing a separate liquid inlet pipe and a separate liquid outlet pipe for each layer of heat exchange unit 100, the pipeline layout solution disclosed in the present invention helps to save the required number of pipelines and simplify the layout of the heat exchange pipeline 300.

[0054] In some embodiments, as Figure 3 As shown, the battery temperature control system further includes a circulation device 400 , which is used to input heat exchange medium into the liquid inlet pipe 301 and to receive the heat exchange medium discharged from the liquid outlet pipe 302 .

[0055] Here, the circulation device 400 is configured to drive the heat exchange medium to flow through the circulation loop of the battery temperature control system of the present disclosure. The circulation device 400 may include components such as a liquid storage device and a heat exchange device. The liquid storage device is used to store the heat exchange medium required by the battery temperature control system, and the heat exchange device is used to heat or cool the heat exchange medium to achieve temperature regulation of the heat exchange medium.

[0056] like Figure 3 As shown, the liquid inlet pipe 301 has only one liquid inlet pipe inlet 3011 connected to the circulation device 400. In some implementations, the output end of the circulation device 400 is fluidically connected to the liquid inlet pipe inlet 3011 to input a heat exchange medium with a preset temperature into the liquid inlet pipe 301.

[0057] like Figure 3 As shown, the liquid outlet pipe 302 is provided with only one liquid outlet 3021 that is in communication with the circulation device 400. In some implementations, the return end of the circulation device 400 is fluidically connected to the liquid outlet 3021 to receive and recover the heat exchange medium discharged from the liquid outlet pipe 302 that has completed heat exchange with the battery cell 200.

[0058] Based on this, providing a single liquid inlet 3011 or a single liquid outlet 3021 in the heat exchange pipe 300 helps to simplify the overall piping structure of the heat exchange pipe 300 and reduce the complexity of manufacturing and assembly.

[0059] In some embodiments, reference Figure 1 As shown, the heat exchange unit liquid inlet 101 and the heat exchange unit liquid outlet 102 of the two layers of heat exchange units 100 are both arranged on the same side of the two layers of heat exchange units 100 .

[0060] Specifically, an accommodation space 1a for accommodating the battery core 200 is formed between the two layers of heat exchange units 100. Figure 1 In a specific embodiment shown, each layer of heat exchange units 100 is roughly rectangular, and the accommodating space 1a formed between two layers of heat exchange units 100 has six outer side surfaces, namely, a left side and a right side opposite in the x direction, two front sides and a rear side opposite in the y direction, and an upper side and a lower side opposite in the z direction.

[0061] On this basis, the "side" of the two-layer heat exchange unit 100 can refer to a side coplanar with any of the six external side surfaces described above. In other embodiments described below, when referring to the "same side" or "a certain side" of the two-layer heat exchange unit 100, the meaning thereof can be understood with reference to the description herein. In other embodiments where the accommodation space 1a has more external side surfaces, the meanings of "side," "same side," and "a certain side" can also refer to the above explanation.

[0062] For example, Figure 1 As shown, the heat exchange unit liquid inlet 101 and the heat exchange unit liquid outlet 102 are both located on the front side of the two-layer heat exchange unit 100 (i.e., the side coplanar with the front side of the accommodating space 1a). The co-lateral arrangement of the heat exchange unit liquid inlet 101 and the heat exchange unit liquid outlet 102 simplifies the connection between the heat exchange unit 100 and external pipelines (such as the liquid inlet pipe 301 and the liquid outlet pipe 302).

[0063] refer to Figure 1 and Figure 2As shown, the liquid inlet pipe 301 and the liquid outlet pipe 302 are both arranged on the same side of the two-layer heat exchange unit 100. Further, the liquid inlet pipe 301 is arranged on the corresponding side with the heat exchange unit liquid inlet 101 of the two-layer heat exchange unit 100, and the liquid outlet pipe 302 is arranged on the corresponding side with the liquid outlet pipe 302 of the two-layer heat exchange unit 100. Figure 1 As shown, the liquid inlet pipe 301 , the liquid outlet pipe 302 , and the heat exchange unit liquid inlet 101 and the heat exchange unit liquid outlet 102 of the two-layer heat exchange unit 100 are all arranged on the front side of the two-layer heat exchange unit 100 .

[0064] During the battery pack manufacturing process, the corresponding battery temperature control system requires piping assembly. The layout design of the liquid inlet and outlet and the corresponding piping in the battery temperature control system provided in the above embodiment helps conserve the space occupied by the battery temperature control system. Assembly and maintenance only need to be performed on the same side of the battery pack, which helps improve efficiency. This battery temperature control system design is suitable for equipment or systems that are sensitive to space layout, such as engineering vehicles, compact passenger cars, or standardized modules.

[0065] In some embodiments, reference Figure 1 and Figure 4 As shown, each layer of heat exchange unit 100 includes at least two heat exchange plates 110 arranged at intervals, and the two heat exchange plates 110 in the two layers of heat exchange units 100 at corresponding positions constitute a heat exchange module 110a. A subspace 11a of the accommodating space 1a is formed between the two heat exchange plates 110 in the heat exchange module 110a. The subspace 11a is used to accommodate a battery cell module 200a consisting of a portion of the battery cells 200 accommodated in the accommodating space 1a where the subspace 11a is located. The battery temperature control system also includes a connecting pipe 500, which is used to connect the heat exchange flow channels in at least two heat exchange plates 110 located in the two layers of heat exchange units 100 in at least two heat exchange modules 110a.

[0066] Here, each battery module 200a is provided with a heat exchange plate 110 on both the upper and lower sides, and the two corresponding heat exchange plates 110 form a heat exchange module 110a for heat exchange of the battery module 200a. Figure 4 The middle heat exchange plate 110 - 1 and the heat exchange plate 110 - 2 form a heat exchange module 110 a , and the heat exchange plate 110 - 3 and the heat exchange plate 110 - 4 form another heat exchange module 110 a .

[0067] According to the embodiment of the present disclosure, the structure or material of the heat exchange plate 110 can be selected according to actual needs and is not specifically limited here.

[0068] In some embodiments, the heat exchange plates 110 are aluminum plates.

[0069] In other embodiments, the heat exchange plate 110 is a stamped cold plate or a profiled cold plate.

[0070] In yet other embodiments, the heat exchange plate 110 is provided with an S-shaped flow channel, a U-shaped flow channel or a straight flow channel to provide heat exchange flow channels with different flow directions in the heat exchange plate 110 to meet different flow requirements of the heat exchange medium.

[0071] As some implementations, the two heat exchange plates 110 in a heat exchange module 110a can be different types of cold plates. Figure 6 In some examples shown, the heat exchange plate 110-1 at the bottom of the heat exchange module 110a is a profiled cold plate, and the heat exchange plate 110-2 at the top of the heat exchange module 110a is a stamped cold plate. Optionally, the stamped cold plate has an S-shaped flow channel or a U-shaped flow channel, and the profiled cold plate has a straight flow channel. Figure 6 The arrows shown in FIG. 1 schematically show the flow direction of the heat exchange medium in the heat exchange plate 110 .

[0072] In some embodiments, thermally conductive adhesive is provided between the heat exchange plate 110 and the cell module 200a. The thermally conductive adhesive has a high thermal conductivity and can bond the heat exchange plate 110 to the surface of the cell module 200a while ensuring uniform and stable heat exchange between the heat exchange plate 110 and the cell module 200a.

[0073] The heat exchange unit 100 is provided with at least two heat exchange plates 110 arranged at intervals, which helps to increase the area of ​​each layer of the heat exchange unit 100 when needed to adapt to the temperature control requirements of battery packs of different sizes.

[0074] For example, when the power of the battery pack needs to be increased, the number of battery cells 200 in the battery pack can be increased accordingly, and the area of ​​the heat exchange unit 100 can also be increased accordingly.

[0075] As some implementations, the number of cells 200 may be increased in the width direction of the battery pack, for example, Figure 1 In this case, the length of the heat exchange unit 100 in the x-direction can be increased accordingly. This can be achieved by adding one or more heat exchange plates 100 along the x-direction, so that the added cell modules 200a have correspondingly added heat exchange modules 110a to achieve heat exchange, thereby meeting the temperature control requirements of the additional cell 200 in the width direction.

[0076] As another implementation, the number of battery cells 200 can be increased in the thickness direction of the battery pack. In this case, the length of the heat exchange unit 100 in the y direction can be increased accordingly. Specifically, this can be achieved by lengthening the heat exchange plate 100 in the y direction to meet the temperature control requirements of the additional battery cells 200 in the thickness direction.

[0077] In the above embodiment, a connecting pipe 500 is provided for connecting the heat exchange channels in at least two heat exchange plates 110 located in two layers of heat exchange units 100 in at least two heat exchange modules 110a, thereby connecting not only the heat exchange media in different heat exchange modules 110a, but also the heat exchange media in the heat exchange plates 110 located in heat exchange units 100 on different layers, which helps to improve the temperature balance between different heat exchange plates 110.

[0078] For some implementations, see Figure 4 The heat exchange medium in the heat exchange plate 110-1 located at the lower left and the heat exchange plate 110-3 located at the upper right are connected through the connecting pipe 500, and the heat exchange medium in the heat exchange plate 110-2 located at the upper left and the heat exchange plate 110-4 located at the lower right are connected through the connecting pipe 500.

[0079] Of course, according to the embodiments of the present disclosure, the communication is not limited to connecting the heat exchange media in the heat exchange plates 110 in adjacent heat exchange modules 110a. By adaptively adjusting the design of the connecting pipe 500, for example, by increasing the length of the inlet pipe 501 and the outlet pipe 502, the heat exchange media in the heat exchange plates 110 in different heat exchange modules 110a located at different positions in the x-direction can be connected.

[0080] In some embodiments, as Figure 4 As shown, each heat exchange plate 110 is provided with a heat exchange plate liquid inlet 111 and a heat exchange plate liquid outlet 112 at both ends. The connecting pipeline 500 includes an inlet pipeline 501 and an outlet pipeline 502 that communicate with each other. The inlet pipeline 501 communicates with the heat exchange plate liquid inlets 111 of the two heat exchange plates 110 located in the two-layer heat exchange unit 100 and in the two heat exchange modules 110a. The outlet pipeline 502 communicates with the heat exchange plate liquid outlets 112 of the two heat exchange plates 110 located in the two-layer heat exchange unit 100 and in the two heat exchange modules 110a.

[0081] Based on this, by setting an inlet pipeline 501 and an outlet pipeline 502 that are interconnected in the connecting pipeline 500, the heat exchange medium output from the two heat exchange plates 110 can be first mixed in the outlet pipeline 502, and then further input into the other two heat exchange plates 110 through the inlet pipeline 501 connected to the outlet pipeline 502.

[0082] refer to Figure 2 and Figure 4As shown in a specific example, outlet pipe 502 is connected to the heat exchange plate outlets 112 of heat exchange plates 110-2 and 110-4, respectively, located in two heat exchange modules 110a, while inlet pipe 501 is connected to the heat exchange plate inlets 111 of heat exchange plates 110-1 and 110-3, respectively, located in two heat exchange modules 110a. Here, the heat exchange medium output from heat exchange plates 110-1 and 110-3 is mixed in outlet pipe 502 and then further input into heat exchange plates 110-2 and 110-4 through inlet pipe 501. This process effectively reduces the subsequent uneven heat exchange caused by the temperature difference between the heat exchange medium output from the two heat exchange plates 110. Specifically, if there is a temperature difference between the heat exchange media output by heat exchange plates 110-1 and 110-3, the mixing process in outlet pipe 502 can effectively reduce or even eliminate this temperature difference. The mixed heat exchange media is then respectively input into heat exchange plates 110-2 and 110-4, ensuring that heat exchange plates 110-2 and 110-4 receive heat exchange media at the same temperature. This process can effectively increase the temperature difference between the different heat exchange plates 110 during the heat exchange medium circulation process, thereby improving the balance of the heat exchange effect provided by the different heat exchange plates 110, and helping to improve temperature balance at different locations in the battery pack, especially in multiple different areas corresponding to different heat exchange plates 110.

[0083] In some embodiments, as Figure 2 and Figure 4 As shown, the inlet pipeline 501 and the outlet pipeline 502 are both arranged on the same side of the two-layer heat exchange unit 100. This arrangement helps to shorten the length of the inlet pipeline 501 and the outlet pipeline 502 and simplify the pipeline structure.

[0084] In other embodiments, Figure 2 As shown, the inlet pipeline 501 and the outlet pipeline 502 are cross-arranged to form an X-shaped structure.

[0085] According to the embodiment of the present disclosure, there are various options for connecting the inlet pipe 501 and the outlet pipe 502. For example, the inlet pipe 501 and the outlet pipe 502 can be formed into an integral structure, or a welded structure, or can be connected using valves or pipe fittings to achieve communication between the inlet pipe 501 and the outlet pipe 502.

[0086] As some implementations, such as Figure 2 and Figure 5As shown, the inlet pipeline 501 includes two inlet branches 5011, which are respectively connected to the heat exchange plate liquid inlets 111 of the two heat exchange plates 110 located in the two-layer heat exchange unit 100 and in the two heat exchange modules 110a. The outlet pipeline 502 includes two outlet branches 5021, which are respectively connected to the heat exchange plate liquid outlets 112 of the two heat exchange plates 110 located in the two-layer heat exchange unit 100 and in the two heat exchange modules 110a. The connecting pipeline 500 also includes a four-way valve 503, the four valve ports of which are respectively connected to the two inlet branches 5011 and the two outlet branches 5021, so as to receive the heat exchange medium outputted from the two heat exchange plate liquid outlets 112 by the two outlet branches 5021 and transport the received heat exchange medium to the two heat exchange plate liquid inlets 111 through the two inlet branches 5011.

[0087] For some specific examples, see Figure 7 and Figure 8 As shown, the four-way valve 503 includes a connecting portion 5031 and four connectors 5032 connected to the connecting portion 5031 .

[0088] Optionally, two joints 5032 connected to the connecting portion 5031 in a diagonal direction are respectively connected to the two outlet branches 5021 and are in fluid communication therewith, and another two joints 5032 are respectively connected to the two inlet branches 5011 and are in fluid communication therewith. Optionally, a cavity is provided in the connecting portion 5031 for mixing fluids, particularly heat exchange mediums.

[0089] In some embodiments, reference Figure 4 As shown, in the two adjacent heat exchange plates 110 in each layer of heat exchange units 100, the heat exchange plate liquid inlet 111 and the heat exchange plate liquid outlet 112 of one heat exchange plate 110 are arranged in the same direction as the heat exchange plate liquid inlet 111 and the heat exchange plate liquid outlet 112 of the other heat exchange plate 110 and are both located on the same side of the two layers of heat exchange units 100.

[0090] In a specific example, the heat exchange plate liquid inlet 111 of each heat exchange plate 110 is arranged on the same side as its heat exchange plate liquid outlet 112, so that in each layer of heat exchange units, the heat exchange plate liquid inlets 111 and the heat exchange plate liquid outlets 112 of two adjacent heat exchange plates 110 are arranged alternately. Figure 4 The alternating arrangement is achieved along the x direction as shown in FIG.

[0091] As some implementations, such as Figure 4As shown, along the x-direction in the figure, the heat exchange plate liquid outlet 112 of the heat exchange plate 110-2 is arranged to the left of its heat exchange plate liquid inlet 111; the heat exchange plate liquid outlet 112 of the heat exchange plate 110-3 is also arranged to the left of its heat exchange plate liquid inlet 111. Thus, along the x-direction, the multiple heat exchange plate liquid inlets 111 and the multiple heat exchange plate liquid outlets 112 are arranged alternately in sequence.

[0092] With this arrangement, for any two heat exchange plates 110 in two different heat exchange modules 110a, the adjacent ends of the two heat exchange plates 110 are each provided with a heat exchange plate liquid inlet 111 and a heat exchange plate liquid outlet 112. With this arrangement, if the heat exchange pipelines in the two heat exchange plates 110 are to be connected, it is advantageous to construct the shortest possible connecting pipeline between the heat exchange plate liquid inlet 111 and the heat exchange plate liquid outlet 112 of the two heat exchange plates 110 to be connected, thereby further simplifying the pipeline layout in the battery temperature control system.

[0093] Furthermore, arranging the heat exchange plate liquid inlet 111 and heat exchange plate liquid outlet 112 of each of two adjacent heat exchange plates 110 on the same side of the two-layer heat exchange unit 100 further simplifies the piping layout of the battery temperature control system. In particular, when connecting piping is required between two heat exchange plates 110 (such as the connecting piping 500 in this application), this same-side arrangement effectively reduces the required length of the connecting piping, thereby simplifying layout and reducing the space occupied by the piping.

[0094] In some embodiments, in each heat exchange module 110a, the heat exchange plate liquid inlet 111 and the heat exchange plate liquid outlet 112 of one heat exchange plate 110 are arranged opposite to the heat exchange plate liquid inlet 111 and the heat exchange plate liquid outlet 112 of another heat exchange plate 110 .

[0095] Here, the reverse setting may refer to a reverse setting in a certain direction, or a reverse setting in multiple directions.

[0096] Next, the arrangement positions of the heat exchange plate liquid inlet 111 and the heat exchange plate liquid outlet 112 in each heat exchange plate 110 will be described in detail.

[0097] refer to Figure 4 and Figure 5 As shown, as some implementations, in each heat exchange module 110a, the heat exchange plate liquid inlet 111 and the heat exchange plate liquid outlet 112 of one heat exchange plate 110 are arranged in the opposite direction to the heat exchange plate liquid inlet 111 and the heat exchange plate liquid outlet 112 of another heat exchange plate 110 along the x direction shown in the figure.

[0098] like Figure 4As shown, the heat exchange plate 110 located in the upper heat exchange unit 100 has its heat exchange plate liquid inlet 111 arranged at its right end, and its heat exchange plate liquid outlet 112 arranged at its left end; Figure 4 The heat exchange plate 110 in the lower heat exchange unit 100 has its heat exchange plate liquid inlet 111 located at its left end, and its heat exchange plate liquid outlet 112 located at its right end. Therefore, in the x-direction, the heat exchange medium in the heat exchange plate 110 in the upper heat exchange unit 100 flows from its right end to its left end, while the heat exchange medium in the heat exchange plate 110 in the lower heat exchange unit 100 flows from its left end to its right end.

[0099] Continue to refer Figure 4 and Figure 5 As some implementations, in each heat exchange module 110a, the heat exchange plate liquid inlet 111 and the heat exchange plate liquid outlet 112 of one heat exchange plate 110 and the heat exchange plate liquid inlet 111 and the heat exchange plate liquid outlet 112 of another heat exchange plate 110 can also be set in the opposite direction along the z direction shown in the figure.

[0100] Specifically, such as Figure 4 As shown, the heat exchange plate liquid inlet 111 of the heat exchange plate 110 in the lower heat exchange unit 100 is located below the heat exchange plate outlet 112 of the heat exchange plate 110 in the upper heat exchange unit 100, and the heat exchange plate liquid outlet 112 of the heat exchange plate 110 in the lower heat exchange unit 100 is located below the heat exchange plate inlet 111 of the heat exchange plate 110 in the upper heat exchange unit 100. Thus, along the height of the battery pack, corresponding locations on both sides of the cell module 200a (the upper and lower sides in the figure) exchange heat with the heat exchange plate inlets 111 and heat exchange plate outlets 112 of the two heat exchange plates 110, respectively.

[0101] In some embodiments, the heat exchange plate liquid inlet 111 of the heat exchange plate 110 located at the end of the heat exchange unit 100 constitutes the heat exchange unit liquid inlet 101 of the heat exchange unit 100 in which it is located, or is closer to the heat exchange unit liquid inlet 101 of the heat exchange unit 100 in which it is located than its heat exchange plate liquid outlet 112. The heat exchange plate liquid outlet 112 of the heat exchange plate 110 located at the end of the heat exchange unit 100 constitutes the heat exchange unit liquid outlet 102 of the heat exchange unit 100 in which it is located, or is closer to the heat exchange unit liquid outlet 102 of the heat exchange unit 100 in which it is located than its heat exchange plate liquid inlet 111.

[0102] This arrangement helps reduce the number of redundant interfaces and piping. For example, it can reduce the number of pipes required to transport heat exchange media in the battery temperature control system, thereby eliminating the need for complex connection structures required for these pipes, saving space and simplifying installation.

[0103] For some implementations, see Figure 1 and Figure 4 As shown, the heat exchange plate liquid inlet 111 of the heat exchange plate 110-1 located at the left end of the lower heat exchange unit 100 constitutes the heat exchange unit liquid inlet 101 of the heat exchange unit 100 where it is located, the heat exchange plate liquid outlet 112 of the heat exchange plate 110-2 located at the left end of the upper heat exchange unit 100 constitutes the heat exchange unit liquid outlet 102 of the heat exchange unit 100 where it is located, the heat exchange plate liquid outlet 112 of the heat exchange plate 110-4 located at the right end of the lower heat exchange unit 100 constitutes the heat exchange unit liquid outlet 102 of the heat exchange unit 100 where it is located, and the heat exchange plate liquid inlet 111 of the heat exchange plate 110-3 located at the right end of the upper heat exchange unit 100 constitutes the heat exchange unit liquid inlet 101 of the heat exchange unit 100 where it is located.

[0104] Based on this, the liquid inlet pipe 301 can input heat exchange medium into each layer of heat exchange units 100 from both ends thereof, and the liquid outlet pipe 302 can receive the heat exchange medium from both ends of each layer of heat exchange units 100, after completing heat exchange with the battery cells 200. The heat exchange medium undergoes a flow and heat exchange process from one end to the other in each layer of heat exchange units 100. Furthermore, by circulating between the different heat exchange plates 110, it also achieves flow and heat exchange within the heat exchange units 100 of different layers. As a result, the heat exchange medium can fully flow and achieve sufficient heat exchange within both layers of heat exchange units 100, thereby providing uniform temperature control for the battery cells 200 located between the two layers of heat exchange units 100.

[0105] In some embodiments, the battery temperature control system further includes a quick-connect connector 600 for realizing a quick connection between the pipeline port and the liquid inlet and liquid outlet of the corresponding component.

[0106] For some implementations, see Figure 2 、 Figure 4 and Figure 5 As shown, the quick-connect connector 600 is configured to connect the heat exchange unit 100 and the heat exchange pipe 300. Specifically, the quick-connect connector 600 can be used to connect the heat exchange unit liquid inlet 101 of the heat exchange unit 100 and the corresponding pipe port of the liquid inlet pipe 301, and / or to connect the heat exchange unit liquid outlet 102 of the heat exchange unit 100 and the corresponding pipe port of the liquid outlet pipe 302.

[0107] For some implementations, see Figure 2 、 Figure 4 and Figure 5As shown, the quick-connect connector 600 is configured to connect the heat exchange plate 110 and the connecting pipeline 500. Specifically, the quick-connect connector 600 can be used to connect the heat exchange plate liquid inlet 111 of the heat exchange plate 110 and the corresponding pipeline port of the inlet pipeline 501, and / or to connect the heat exchange plate liquid outlet 112 of the heat exchange plate 110 and the corresponding pipeline port of the outlet pipeline 502.

[0108] The present disclosure further provides a battery pack, comprising a plurality of battery cells 200 and the battery temperature control system, wherein the battery temperature control system is configured to cool the plurality of battery cells 200. The two layers of heat exchange units 100 of the battery temperature control system are respectively arranged on opposite sides of the battery cells 200.

[0109] In some embodiments, as Figure 1 As shown, the plurality of battery cells 200 constitute at least two battery cell modules 200 a arranged at intervals.

[0110] In some embodiments, the battery pack further includes a shell, and the plurality of battery cells 200 and the two-layer heat exchange unit 100 of the battery temperature control system are all disposed in the shell.

[0111] In some embodiments, the heat exchange pipe 300 of the battery temperature control system is also disposed in the housing, thereby facilitating the integrated arrangement of the battery temperature control system in the battery pack.

[0112] The present disclosure also provides a battery comprising at least two of the above-mentioned battery packs, wherein the at least two battery packs are stacked.

[0113] In some implementations, at least two battery packs are stacked in a vertical direction.

[0114] Here, the number of battery packs included in the battery can be adjusted according to the output power to be achieved or the single output power of the battery pack to adapt to the needs of different power systems, such as engineering machinery of different types and powers.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that without departing from the principles of the present disclosure, the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents. These modifications and equivalent replacements should all be included in the scope of the technical solutions claimed for protection in the present disclosure.

Claims

1. A battery temperature control system, characterized in that: include: Two layers of heat exchange units (100) are arranged at intervals, an accommodating space (1a) for accommodating a battery core (200) is formed between the two layers of heat exchange units (100), and a heat exchange unit liquid inlet (101) and a heat exchange unit liquid outlet (102) are respectively provided at both ends of each layer of heat exchange units (100); and The heat exchange pipe (300) comprises a liquid inlet pipe (301) and a liquid outlet pipe (302), wherein the liquid inlet pipe (301) is respectively communicated with the heat exchange unit liquid inlets (101) of the two layers of the heat exchange units (100) to input heat exchange medium into the two layers of the heat exchange units (100), and the liquid outlet pipe (302) is respectively communicated with the heat exchange unit liquid outlets (102) of the two layers of the heat exchange units (100) to discharge the heat exchange medium from the two layers of the heat exchange units (100); The heat exchange unit liquid inlet (101) and the heat exchange unit liquid outlet (102) of one layer of the heat exchange unit (100) are arranged in the opposite direction to the heat exchange unit liquid inlet (101) and the heat exchange unit liquid outlet (102) of another layer of the heat exchange unit (100), so that the heat exchange medium in the two layers of the heat exchange units (100) flows in the opposite direction.

2. The battery temperature control system according to claim 1, characterized in that: It also includes a circulation device (400), the circulation device (400) is used to input heat exchange medium into the liquid inlet pipe (301) and to receive the heat exchange medium discharged from the liquid outlet pipe (302). in, The liquid inlet pipe (301) is provided with only one liquid inlet pipe inlet (3011) communicating with the circulation device (400); and / or The liquid outlet pipe (302) is provided with only one liquid outlet pipe outlet (3021) that is in communication with the circulation device (400).

3. The battery temperature control system according to claim 1, characterized in that: The heat exchange unit liquid inlets (101) and the heat exchange unit liquid outlets (102) of the two layers of heat exchange units (100) are both arranged on the same side of the two layers of heat exchange units (100); and / or The liquid inlet pipe (301) and the liquid outlet pipe (302) are both arranged on the same side of the two layers of the heat exchange units (100).

4. The battery temperature control system according to any one of claims 1 to 3, characterized in that: Each layer of the heat exchange unit (100) comprises at least two heat exchange plates (110) arranged at intervals, and the two heat exchange plates (110) in the two layers of the heat exchange unit (100) at corresponding positions constitute a heat exchange module (110a), and a subspace (11a) of the accommodating space (1a) is formed between the two heat exchange plates (110) in the heat exchange module (110a), and the subspace (11a) is used to accommodate a battery cell module (200a), and the battery cell module (200a) is composed of a portion of the battery cells (200) accommodated in the accommodating space (1a) where the subspace (11a) is located. The battery temperature control system further comprises a connecting pipeline (500), wherein the connecting pipeline (500) is used to connect the heat exchange pipelines in at least two heat exchange plates (110) located in two layers of the heat exchange units (100) in at least two heat exchange modules (110a).

5. The battery temperature control system according to claim 4, characterized in that: Each heat exchange plate (110) is provided with a heat exchange plate liquid inlet (111) and a heat exchange plate liquid outlet (112) at both ends. The connecting pipeline (500) includes an inlet pipeline (501) and an outlet pipeline (502) that are interconnected. The inlet pipe (501) is respectively communicated with the heat exchange plate liquid inlets (111) of the two heat exchange plates (110) located in the two layers of the heat exchange units (100) and located in the two heat exchange modules (110a), and the outlet pipe (502) is respectively communicated with the heat exchange plate liquid outlets (112) of the two heat exchange plates (110) located in the two layers of the heat exchange units (100) and located in the two heat exchange modules (110a).

6. The battery temperature control system according to claim 5, characterized in that: In two adjacent heat exchange plates (110) of each layer of the heat exchange unit (100), the heat exchange plate liquid inlet (111) and the heat exchange plate liquid outlet (112) of one heat exchange plate (110) are arranged in the same direction as the heat exchange plate liquid inlet (111) and the heat exchange plate liquid outlet (112) of the other heat exchange plate (110) and are both located on the same side of the two layers of the heat exchange units (100); and / or In each of the heat exchange modules (110a), the heat exchange plate liquid inlet (111) and the heat exchange plate liquid outlet (112) of one heat exchange plate (110) are arranged in the opposite direction to the heat exchange plate liquid inlet (111) and the heat exchange plate liquid outlet (112) of another heat exchange plate (110); and / or The heat exchange plate liquid inlet (111) of the heat exchange plate (110) located at the end of the heat exchange unit (100) constitutes the heat exchange unit liquid inlet (101) of the heat exchange unit (100) in which it is located, or is closer to the heat exchange unit liquid inlet (101) of the heat exchange unit (100) in which it is located relative to its heat exchange plate liquid outlet (112); the heat exchange plate liquid outlet (112) of the heat exchange plate (110) located at the end of the heat exchange unit (100) constitutes the heat exchange unit liquid outlet (102) of the heat exchange unit (100) in which it is located, or is closer to the heat exchange unit liquid outlet (102) of the heat exchange unit (100) in which it is located relative to its heat exchange plate liquid inlet (111); and / or The inlet pipeline (501) and the outlet pipeline (502) are both arranged on the same side of the two layers of the heat exchange units (100).

7. The battery temperature control system according to claim 5, characterized in that: The inlet pipeline (501) includes two inlet branches (5011), and the two inlet branches (5011) are respectively connected to the heat exchange plate liquid inlets (111) of the two heat exchange plates (110) located in the two layers of the heat exchange units (100) and located in the two heat exchange modules (110a). The outlet pipeline (502) includes two outlet branches (5021), and the two outlet branches (5021) are respectively connected to the heat exchange plate liquid outlets (112) of the two heat exchange plates (110) located in the two layers of the heat exchange units (100) and located in the two heat exchange modules (110a). The connecting pipeline (500) further comprises a four-way valve (503), wherein the four valve ports of the four-way valve (503) are respectively connected to the two inlet branches (5011) and the two outlet branches (5021) to receive the heat exchange medium outputted by the two outlet branches (5021) from the two heat exchange plate liquid outlets (112), and to transport the received heat exchange medium to the two heat exchange plate liquid inlets (111) through the two inlet branches (5011).

8. A battery pack, characterized in that: include: a plurality of battery cells (200); and The battery temperature control system according to any one of claims 1 to 7, configured to cool the plurality of battery cells (200); Wherein, the two layers of heat exchange units (100) of the battery temperature control system are respectively arranged on opposite sides of the plurality of battery cells (200).

9. The battery pack according to claim 8, characterized in that: The plurality of battery cells (200) constitute at least two battery cell modules (200a) arranged at intervals.

10. A battery, characterized in that: Comprising at least two battery packs as described in claim 8 or 9, wherein the at least two battery packs are stacked.

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