Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack. The battery module comprises: a heat exchange assembly, wherein the heat exchange assembly comprises a plurality of heat exchange elements arranged at intervals; the battery cells are accommodated between the adjacent heat exchange elements; the at least one collection bracket is clamped between the adjacent heat exchange elements, and the collection bracket is attached to the battery cell; and the acquisition unit is assembled on the acquisition bracket. According to the utility model, the acquisition bracket is clamped between the adjacent heat exchange elements, and the acquisition bracket is attached to the battery cell, so that the acquisition unit assembled on the acquisition bracket accurately acquires the real temperature of the battery cell, various working conditions are compatible, and the safety and experience feeling of consumers are effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery module and a battery pack. Background Art

[0002] Currently, the temperature of battery modules is generally collected by collecting the temperature of the aluminum busbar or the temperature of the top surface of the negative electrode shell of the battery cell. The aluminum busbar of the fast-charging battery pack has obvious heat generation. The method of collecting temperature signals by collecting the temperature of the aluminum busbar will be affected by the heat generated by the aluminum busbar and cannot represent the actual temperature of the battery. The existing ultra-fast charging battery packs are equipped with different cooling systems such as double-sided liquid cooling and top liquid cooling. As a result, the method of collecting the temperature of the top surface of the negative electrode shell of the battery cell will be affected by the cooling conditions. Similarly, the true temperature of the single battery cell cannot be collected, resulting in frequent false alarms and missed safety policies, resulting in the inability to effectively ensure consumer safety and user experience. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the present invention provides a battery module that can accurately collect the real temperature of the battery cell.

[0004] According to an embodiment of the present invention, a battery module includes: a heat exchange assembly, which includes a plurality of heat exchange elements arranged at intervals; a battery cell, which is accommodated between adjacent heat exchange elements; at least one collection bracket, which is clamped between adjacent heat exchange elements and is attached to the battery cell; and a collection unit, which is assembled on the collection bracket.

[0005] In this battery module, the collection bracket is clamped between adjacent heat exchange elements and the collection bracket is attached to the battery cell, so that the collection unit assembled on the collection bracket can accurately collect the actual temperature of the battery cell, is compatible with various working conditions, and effectively ensures the safety and experience of consumers.

[0006] According to some embodiments of the present invention, the collection bracket is provided with a collection groove, and the battery cell is cooperatively connected to the collection groove.

[0007] According to some embodiments of the present invention, an adhesive member is further included, and the adhesive member is arranged between the collecting groove and the battery core.

[0008] According to some embodiments of the present invention, the collection bracket is provided with an assembly groove, and the collection unit is assembled in the assembly groove.

[0009] According to some embodiments of the present invention, a heat conducting member is filled between the collecting unit and the assembly groove.

[0010] According to some embodiments of the present invention, the acquisition unit includes an NTC chip, an acquisition harness, and a connector. The NTC chip is assembled on the acquisition bracket, and the acquisition harness is electrically connected between the NTC chip and the connector.

[0011] According to some embodiments of the present invention, a protective layer is further included, and the protective layer is wrapped around the surface of the NTC chip.

[0012] According to some embodiments of the present invention, the collection bracket is provided with extended guard arms on both sides along the arrangement direction of the heat exchange elements, and the extended guard arms abut against the heat exchange elements.

[0013] According to some embodiments of the present invention, at least one extension connecting rod is connected between the extension guard arm and the collection bracket, and the extension connecting rod is L-shaped, so as to form at least one buffer cavity between the extension guard arm and the collection bracket.

[0014] According to some embodiments of the present invention, a plurality of friction parts are provided between the extended guard arm and the heat exchange element.

[0015] Based on the same inventive concept, the present invention also proposes a battery pack, comprising a BMS module and the battery module as described above, wherein the acquisition unit and the BMS module are detachably connected.

[0016] In summary, the battery module provided by the present invention has the following technical effects:

[0017] By clamping the collection bracket between adjacent heat exchange elements and the collection bracket being attached to the battery cell, the collection unit assembled on the collection bracket can accurately collect the actual temperature of the battery cell, be compatible with various working conditions, and effectively ensure the safety and experience of consumers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a battery module according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A magnified schematic diagram of area A;

[0020] Figure 3 This is a schematic structural diagram of a battery module having a heat exchange element on one side according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic structural diagram of a collection bracket according to an embodiment of the present utility model;

[0022] Figure 5This is a schematic diagram of the exploded structure of the collection unit of an embodiment of the present utility model.

[0023] The meanings of the reference numerals are as follows:

[0024] 1. Heat exchange assembly; 11. Heat exchange element; 2. Battery cell; 3. Collection bracket; 31. Collection groove; 32. Assembly slot; 33. Heat conductor; 34. Extended guard arm; 35. Extended connecting rod; 36. Buffer chamber; 37. Friction part; 4. Collection unit; 41. NTC chip; 42. Collection harness; 43. Connector. DETAILED DESCRIPTION

[0025] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] See Figure 1 and Figure 2 The present utility model discloses a battery module. The battery module includes a heat exchange component 1, a battery cell 2, at least one collection bracket 3 and a collection unit 4. In some embodiments, the heat exchange component 1 includes a plurality of heat exchange elements 11 arranged at intervals; the battery cell 2 is accommodated between adjacent heat exchange elements 11; the collection bracket 3 is clamped between adjacent heat exchange elements 11, and the collection bracket 3 is attached to the battery cell 2; the collection unit 4 is assembled on the collection bracket 3. Preferably, by clamping the collection bracket 3 between adjacent heat exchange elements 11 and the collection bracket 3 is attached to the battery cell 2, the collection unit 4 assembled on the collection bracket 3 can accurately collect the real temperature of the battery cell 2, be compatible with a variety of working conditions, and effectively ensure the safety and experience of consumers.

[0029] Optionally, one side of the collection bracket 3 abuts against one of the heat exchange elements 11, and the other side of the collection bracket 3 abuts against another heat exchange element 11, so that the collection bracket 3 is clamped between adjacent heat exchange elements 11. Preferably, the gap formed by the collection bracket 3 and the adjacent heat exchange elements 11 is interference fit, so that the collection bracket 3 is fixed between the gap, so that it can fit on the battery cell 2, accurately collect the real temperature of the battery cell 2, and be compatible with various working conditions. Furthermore, by clamping the collection bracket 3 to the two heat exchange elements 11, the battery cell is effectively avoided as the force object, and the collection bracket 3 is prevented from continuously applying additional force to the battery cell 2; optionally, the heat exchange element 11 can be a liquid cooling plate for heat dissipation and cooling, or a heating plate for thermal insulation and heating; optionally, the collection unit 4 can be electrically connected to external equipment, wherein the external equipment can be a BMS system, a CCS integrated busbar, a wired or wireless signal transmission relay node, an MCU, a CPU, and a data storage device, etc.

[0030] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5 In some embodiments, the collection bracket 3 is provided with a collection groove 31, and the battery cell 2 is connected to the collection groove 31. Preferably, the collection bracket 3 is connected to the battery cell 2 via the collection groove 31, or the collection bracket 3 is sleeved on the outside of the battery cell 2 via the collection groove 31. The battery cell 2 can be square, cylindrical, or other shapes, and the collection groove 31 can be square, circular, or arc-shaped to match the battery cell 2, so that the collection bracket 3 fits the outer surface of the battery cell 2 through the collection groove 31, thereby shortening the distance between the collection unit 4 and the battery cell 2.

[0031] In some embodiments, an adhesive is further included, and the adhesive is disposed between the collection groove 31 and the battery cell 2. Preferably, the collection bracket 3 is fixed in the gap by interference fit between the gap formed by the collection bracket 3 and the adjacent heat exchange element 11, and at the same time, the collection bracket 3 is bonded to the battery cell 2 by the adhesive in the collection groove 31, achieving a double connection and ensuring that the collection bracket 3 is reliably fixed to the outside of the battery cell 2; optionally, the adhesive can be a glue, structural glue, temperature-sensitive glue, etc. coated or filled in the collection groove 31. For further information, see Figure 3 When the heat exchange element 11 is only provided on one side of the battery cell 2 (that is, the battery module has the heat exchange element 11 on only one side), the collection bracket 3 can also be bonded to the battery cell 2 through the adhesive in the collection groove 31, driving the collection bracket 3 to be fixed on the outside of the battery cell 2, further expanding the compatible working conditions.

[0032] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5 In some embodiments, the collection bracket 3 is provided with an assembly slot 32, and the collection unit 4 is assembled in the assembly slot 32. Preferably, the collection unit 4 is fixed by using the assembly slot 32 on the collection bracket 3, so that the collection unit 4 is locked to the collection bracket 3. Specifically, the collection bracket 3 is attached to the outer side of the battery cell 2, so that the collection unit 4 in the assembly slot 32 is attached to and collects the temperature of the battery cell 2, and then transmits the temperature signal to an external device. Optionally, the collection bracket 3 is made of PPS material to ensure that the collection bracket 3 has high thermal conductivity, with a thermal conductivity coefficient of 1.2W / m*k, which is 10 times higher than that of conventional materials. The thermal time constant can reach <5s, with a high response speed, and can more accurately output the temperature signal to the collection unit 4 assembled in the assembly.

[0033] See Figure 4 and Figure 5 In some embodiments, a heat conducting member 33 is filled between the collection unit 4 and the assembly slot 32. Preferably, by filling the heat conducting member 33 between the collection unit 4 and the assembly slot 32, the collection unit 4 is fully in contact with the inner wall of the assembly slot 32. That is, the heat conducting member 33 drives the collection unit 4 to fully contact the collection bracket 3, thereby improving the heat transfer efficiency between the collection unit 4 and the collection bracket 3, so that the collection unit 4 can accurately collect the actual temperature of the battery cell 2. Optionally, the heat conducting member 33 is a temperature-sensitive adhesive. Specifically, the temperature-sensitive adhesive is filled into the assembly slot 32 by pouring, so that the collection unit 4 and the collection bracket 3 are fixed as a whole, further reliably fixing the collection unit 4 in the assembly slot 32, and preventing the collection unit 4 from being separated from the assembly slot 32 due to external vibrations.

[0034] See Figure 4 and Figure 5In some embodiments, the acquisition unit 4 includes but is not limited to NTC, RTD, thermocouple and semiconductor-based temperature sensors; preferably, the acquisition unit 4 includes an NTC chip 41, an acquisition harness 42 and a connector 43, the NTC chip 41 is assembled on the acquisition bracket 3, and the acquisition harness 42 is electrically connected between the NTC chip 41 and the connector 43. Optionally, the connector 43 can be an interface or a joint, which can be detachably connected to an external device, such as a BMS module, and is used to transmit the temperature signal collected by the NTC chip 41 to the external device. When the collection unit 4 is damaged, it can be directly disassembled and replaced, solving the problem that the traditional FPC / FFC patch packaging collection is unrepairable; Optionally, the NTC chip 41 is assembled in the assembly slot 32 of the collection bracket 3, and a temperature-sensitive glue is provided between the NTC chip 41 and the assembly slot 32, so that the NTC chip 41 is in full contact with the collection bracket 3, thereby improving the heat transfer efficiency between the NTC chip 41 and the collection bracket 3, so that the NTC chip 41 can accurately collect the real temperature of the battery cell 2; Optionally, the perfusion method is adopted. The assembly slot 32 is filled with temperature-sensitive glue to fix the NTC chip 41 and the acquisition bracket 3 into one, and the NTC chip 41 is further reliably fixed in the assembly slot 32 to prevent the NTC chip 41 from being separated from the assembly slot 32 due to external vibrations. Optionally, one end of the acquisition harness 42 is welded to the NTC chip 41, and the other end of the acquisition harness 42 is welded to the connector 43, so that the NTC chip 41 forms a good electrical connection with the connector 43 through the acquisition harness 42, and can transmit signals. Furthermore, the ductility of the acquisition harness 42 and the ability to bend at different angles can be utilized to fully utilize space for wiring, improve space utilization, and reduce production costs.

[0035] Furthermore, a protective layer is included, which is wrapped around the surface of the NTC chip 41. Optionally, the protective layer is made of epoxy resin; preferably, after the NTC chip 41 is welded to the collection harness 42, epoxy resin is used to wrap the surface of the NTC chip 41 to prevent water vapor from invading the NTC chip 41 and the welding point between the NTC chip 41 and the collection harness 42, and then the NTC chip 41 wrapped in epoxy resin is assembled in the assembly groove 32, and the space between the NTC chip 41 and the assembly groove 32 is filled with temperature-sensitive glue to achieve full contact between the NTC chip 41 and the inner wall of the assembly groove 32, that is, the NTC chip 41 is in full contact with the collection bracket 3, thereby improving the heat transfer efficiency between the NTC chip 41 and the collection bracket 3, so that the NTC chip 41 can accurately collect the true temperature of the battery cell 2.

[0036] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5 In some embodiments, the collection bracket 3 is provided with extended guard arms 34 on both sides along the arrangement direction of the heat exchange elements 11, and the extended guard arms 34 abut against the heat exchange elements 11. Preferably, the two extended guard arms 34 can be respectively extended from the collection bracket 3 toward the corresponding heat exchange elements 11, that is, one side of the collection bracket 3 abuts against one heat exchange element 11 through one extended guard arm 34, and the other side of the collection bracket 3 abuts against another heat exchange element 11 through the other extended guard arm 34, driving the collection bracket 3 to be clamped between adjacent heat exchange elements 11, achieving a gap interference fit between the collection bracket 3 and the adjacent heat exchange elements 11.

[0037] See Figure 4 and Figure 5 In some embodiments, a plurality of friction members 37 are provided between the extended guard arm 34 and the heat exchange element 11. Optionally, the friction members 37 may comprise a plurality of protrusions or bumps, etc., for increasing the friction between the extended guard arm 34 and the heat exchange element 11. Preferably, the friction members 37 are silicone strips, that is, the end surface of the extended guard arm 34 that abuts the heat exchange element 11 is provided with a plurality of silicone strips to increase the friction between the extended guard arm 34 and the heat exchange element 11, thereby enabling the collector to be reliably fixed between adjacent heat exchange elements 11.

[0038] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5In some embodiments, at least one extension link 35 is connected between the extended guard arm 34 and the collection bracket 3. The extension link 35 is L-shaped, so as to form at least one buffer cavity 36 between the extended guard arm 34 and the collection bracket 3. Optionally, the L-shaped extension link 35 includes a horizontal section and a vertical section, wherein the vertical section is parallel to the extended guard arm 34, and the horizontal section is perpendicular to the vertical section and extends from two opposite sides of the collection bracket 3 toward the liquid cooling plate. One end of the vertical section is connected to the collection bracket 3, the other end of the vertical section is connected to one end of the horizontal section, and the other end of the horizontal section is connected to the extended guard arm 34, so as to form a buffer cavity 36 between the extended guard arm 34 and the collection bracket 3. Optionally, when there are multiple extension links 35, the multiple extension links 35 are sequentially connected between the extended guard arm 34 and the collection bracket 3 along the arrangement direction of the heat exchange element 11. The number of extension links 35 can be set based on actual assembly conditions. Preferably, a buffer cavity 36 is formed between the extended guard arm 34 and the collection bracket 3, so that the extended guard arm 34 can be prevented from directly interfering with the collection bracket 3 under the squeezing of the heat exchange element 11, thereby effectively protecting the collection bracket 3; and when the gap formed by the collection bracket 3 and the adjacent heat exchange element 11 is interference fit, the buffer cavity 36 can be used to provide deformation space for the deformation of the extended guard arm 34 during assembly and disassembly, thereby facilitating installation and replacement.

[0039] In some embodiments, a battery pack includes a BMS module and the battery module described above, wherein the acquisition unit 4 and the BMS module are detachably connected. Preferably, the acquisition unit 4 includes an NTC chip 41, an acquisition harness 42, and a connector 43. One end of the acquisition harness 42 is welded to the NTC chip 41, and the other end of the acquisition harness 42 is welded to the connector 43, so that the NTC chip 41 is electrically connected to the connector 43 through the acquisition harness 42, enabling signal transmission. The NTC chip 41 is fixed integrally with the acquisition bracket 3, the acquisition bracket 3 is clamped between adjacent heat exchange elements 11, and the acquisition bracket 3 is affixed to the battery cell 2. The connector 43 is detachably connected to the BMS module, thereby achieving detachable connection between the acquisition unit 4 and the battery cell 2 and the BMS module. In this way, when any component of the acquisition unit 4 has a problem, the acquisition unit 4 can be removed and replaced independently, thereby solving the problem of traditional temperature acquisition components being unrepairable.

[0040] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5In some embodiments, the battery cell 2 is accommodated between at least two of the heat exchange elements 11 arranged at intervals, and the gap formed by the collection bracket 3 and the adjacent heat exchange elements 11 is interference fit so that the collection bracket 3 is fixed between the gaps, and the collection bracket 3 is attached to the battery cell 2, driving the collection unit 4 assembled on the collection bracket 3 to accurately collect the real temperature of the battery cell 2. Preferably, the collection bracket 3 is provided with the extended guard arm 34 on both sides along the arrangement direction of the heat exchange elements 11, that is, one side of the collection bracket 3 is extended by an extension arm 34. The guard arm 34 abuts against one of the heat exchange elements 11, and the other side of the collection bracket 3 abuts against another heat exchange element 11 through another extended guard arm 34, driving the collection bracket 3 to be reliably clamped between the adjacent heat exchange elements 11, realizing the interference fit of the gap formed between the collection bracket 3 and the adjacent heat exchange elements 11; further, one end of the extended guard arm 34 abuts against the heat exchange element 11, and the other end of the extended guard arm 34 is connected to the collection bracket 3 by the L-shaped extension rod 35, driving the extended guard arm 34 to the collection bracket 3 A buffer cavity 36 is formed between the extended guard arm 34 to prevent the extended guard arm 34 from directly interfering with the collection bracket 3 under the squeeze of the heat exchange element 11, effectively protecting the collection bracket 3, and when the gap formed between the collection bracket 3 and the adjacent heat exchange element 11 is interference fit, the buffer cavity 36 can be used to provide deformation space for the deformation of the extended guard arm 34 during assembly and disassembly. Preferably, the collection unit 4 is composed of the NTC chip 41, the collection harness 42 and the connector 43, and one end of the collection harness 42 is welded to the NTC chip 41. One end of the acquisition harness 42 is welded to the connector 43, so that the NTC chip 41 is electrically connected to the connector 43 through the acquisition harness 42, and signal transmission can be performed, wherein the NTC chip 41 is fixed to the acquisition bracket 3 as a whole, and the connector 43 is detachably connected to the BMS module, that is, the acquisition unit 4 is detachably connected to the battery cell 2 and the BMS module. In this way, when any component in the acquisition unit 4 has a problem, the acquisition unit 4 can be removed and replaced independently, thereby solving the problem that traditional temperature acquisition components are unrepairable.

[0041] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A battery module, characterized in that: include: A heat exchange assembly (1), the heat exchange assembly (1) comprising a plurality of heat exchange elements (11) arranged at intervals; A battery core (2), the battery core (2) being accommodated between adjacent heat exchange elements (11); at least one collecting bracket (3), the collecting bracket (3) being clamped between adjacent heat exchange elements (11), and the collecting bracket (3) being attached to the battery core (2); A collection unit (4), wherein the collection unit (4) is assembled on the collection bracket (3).

2. The battery module according to claim 1, wherein: The collecting bracket (3) is provided with a collecting groove (31), and the battery core (2) is cooperatively connected to the collecting groove (31).

3. The battery module according to claim 2, wherein: It also includes an adhesive member, which is arranged between the collecting groove (31) and the battery core (2).

4. The battery module according to claim 1, wherein: The collection bracket (3) is provided with an assembly groove (32), and the collection unit (4) is assembled in the assembly groove (32).

5. The battery module according to claim 4, wherein: A heat conducting member (33) is filled between the collecting unit (4) and the assembly groove (32).

6. The battery module according to claim 1, wherein: The acquisition unit (4) comprises an NTC chip (41), an acquisition harness (42) and a connector (43); the NTC chip (41) is assembled on the acquisition bracket (3); and the acquisition harness (42) is electrically connected between the NTC chip (41) and the connector (43).

7. The battery module according to claim 6, wherein: It also includes a protective layer, which is wrapped around the surface of the NTC chip (41).

8. The battery module according to any one of claims 1 to 7, characterized in that: The collection bracket (3) is provided with extended guard arms (34) on both sides along the arrangement direction of the heat exchange elements (11), and the extended guard arms (34) abut against the heat exchange elements (11).

9. The battery module according to claim 8, wherein: At least one extension connecting rod (35) is connected between the extension guard arm (34) and the collection bracket (3), and the extension connecting rod (35) is L-shaped, so that at least one buffer cavity (36) is formed between the extension guard arm (34) and the collection bracket (3).

10. The battery module according to claim 8, wherein: A plurality of friction parts (37) are provided between the extended guard arm (34) and the heat exchange element (11).

11. A battery pack, characterized in that: It comprises a BMS module and a battery module according to any one of claims 1 to 10, wherein the acquisition unit (4) and the BMS module are detachably connected.

Images