Cold plate bracket, battery pack box body assembly and battery pack

Abstract

The utility model relates to the technical field of battery packs, and discloses a cold plate bracket, a battery pack box body assembly and a battery pack, the cold plate bracket is used for fixing a cold plate in a battery pack box body, and comprises a support main body, a connecting part, a connecting part and a connecting part, and the connecting part is arranged on the support main body and can be used for connecting the cold plate; a first supporting plate and a second supporting plate extend out of the two sides of the supporting body respectively, and the first supporting plate, the second supporting plate and the supporting body are integrally arranged. A plurality of reinforcing ribs are arranged between the first supporting plate and the supporting main body and between the second supporting plate and the supporting main body; when the cold plate bracket fixes the cold plate in the battery pack box body, the first supporting plate and the second supporting plate abut against the inner wall of the battery pack box body and are fixedly connected with the inner wall of the battery pack box body; and the connecting part is fixedly connected with the cold plate. The cold plate bracket has the advantages that the Y-direction strength of the battery pack can be effectively improved, so that the column collision test on the two sides of a main driver and an auxiliary driver is met, and the self-strength is high.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a cold plate bracket, a battery pack housing assembly, and a battery pack. Background Technology

[0002] The battery pack is the power source of the electric vehicle, and the cooling plate is one of the main heat exchange components in the battery. It is placed between the battery cells to exchange heat with them and maintain the battery's optimal operating temperature. During installation, the cooling plate is fixedly mounted in the battery housing by a cooling plate bracket.

[0003] Existing cold-rolled steel plate brackets are generally sheet metal brackets, formed by stamping. Although sheet metal brackets are simple to manufacture and process, it is difficult to design complex structures on sheet metal brackets. Otherwise, stamping cannot be performed, resulting in poor support strength and making it difficult to meet the requirements of the pole impact detection for the driver and passenger sides. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a cold plate bracket that can effectively increase the Y-direction strength of the battery pack and has high support strength, as well as a battery pack housing assembly and battery pack including the cold plate bracket.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a cold plate bracket for fixing a cold plate in the battery pack housing, comprising:

[0006] A supporting body, wherein the supporting body is provided with a connecting part for connecting a cold plate;

[0007] The first support plate and the second support plate extend from both sides of the main support body, and the first support plate, the second support plate and the main support body are integrally formed; a number of reinforcing ribs are provided between the first support plate and the main support body, and between the second support plate and the main support body.

[0008] When the cold plate bracket fixes the cold plate in the battery pack housing, the first support plate and the second support plate abut against the inner wall of the battery pack housing and are fixedly connected thereto; the connecting part is fixedly connected to the cold plate.

[0009] Furthermore, the supporting body, the first support plate, the second support plate, and the reinforcing rib are all made of aluminum alloy and are die-cast as a single piece.

[0010] Furthermore, the connecting part includes two connecting plates arranged at intervals, a slot is formed between the two connecting plates for the cold plate to be inserted, and the two connecting plates are provided with a plurality of through holes for fixing the cold plate.

[0011] Furthermore, a plurality of reinforcing ribs are provided between one of the connecting plates and the first support plate, and between the other connecting plate and the second support plate.

[0012] Furthermore, both connecting plates are perpendicular to the first support plate and the second support plate;

[0013] A ramp is provided between the first support plate and one of the connecting plates, and between the second support plate and the other connecting plate;

[0014] The reinforcing ribs are installed on the slope.

[0015] Furthermore, the support body has a through hole running from front to back through its center, and the through hole divides both connecting plates into two connecting units, each of which is provided with a reinforcing rib.

[0016] The supporting body has a notch;

[0017] Both the through hole and the notch allow cooling pipes to pass through.

[0018] Furthermore, both the first support plate and the second support plate are provided with fixing holes through which fasteners can pass, and the fasteners can pass through the fixing holes to fix the first support plate or the second support plate to the inner wall of the battery pack housing.

[0019] Furthermore, the support body is provided with a plurality of material reduction grooves on the side away from the connecting part, and the openings of the material reduction grooves face the side away from the connecting part;

[0020] The cross-sectional area of ​​the material reduction groove gradually decreases from the opening end to the bottom of the groove.

[0021] This utility model also proposes a battery pack housing assembly, comprising:

[0022] Battery pack housing;

[0023] Multiple cold-plates and multiple cold-plate supports as described above;

[0024] Multiple cold plates are disposed in the battery pack housing and are arranged at intervals along the length of the battery pack housing. One or both ends of the cold plates are fixed to the inner wall of the battery pack housing by the cold plate bracket.

[0025] This utility model also proposes a battery pack, comprising:

[0026] The battery cell stack and the aforementioned battery pack housing assembly, wherein the battery cell stack is disposed within the battery pack housing;

[0027] The battery cell stack includes multiple battery cells, and the battery cells are disposed between two adjacent cold plates.

[0028] Compared with the prior art, the present invention has at least the following beneficial effects:

[0029] (1) In this utility model, the cold plate bracket includes an integrally formed support body, a first support plate, and a second support plate. Multiple reinforcing ribs are provided between the first support plate and the support body, and between the second support plate and the support body, resulting in high strength of the cold plate bracket itself. Furthermore, when the cold plate is fixed in the battery pack housing using the cold plate bracket, the first and second support plates abut against the inner wall of the battery pack housing and are fixedly connected thereto, forming a large-area contact. The bottom surfaces of both the first and second support plates simultaneously abut against the inner wall of the battery pack housing, while the cold plate is fixed to the support portion of the support body, resulting in high support strength of the cold plate bracket. During side pole impact tests on new energy vehicles, the battery pack housing is subjected to a Y-direction load (i.e., the direction of the cold plate). The cold plate bracket can provide support and protection for the battery pack housing, effectively enhancing the Y-direction strength of the battery pack housing, thus strengthening the Y-direction strength of the battery pack and meeting the requirements of side pole impact tests for the driver and passenger sides.

[0030] (2) In this utility model, the supporting body, the first support plate, the second support plate and the reinforcing rib are made of aluminum alloy and are formed into one piece by die casting, which is convenient to manufacture and has high overall structural strength.

[0031] (3) In this utility model, the connecting part on the supporting body includes two connecting plates arranged at intervals, and a slot is formed between the two connecting plates. The cold plate can be directly inserted into the slot and fixed to the two connecting plates by fasteners. The cold plate is easy to assemble and disassemble. Among them, multiple reinforcing ribs are provided between one connecting plate and the first support plate, and multiple reinforcing ribs are also provided between the other connecting plate and the second support plate, which can effectively ensure the supporting strength of the two connecting plates and the first and second support plates and prevent deformation.

[0032] (4) In this utility model, multiple material-reducing grooves are provided on the back side of the support body. This reduces the amount of aluminum material required for each cold plate bracket during die casting, thereby reducing the cost of each cold plate bracket. Furthermore, it ensures uniform wall thickness of the cold plate bracket, improving the forming qualification rate and thus guaranteeing the forming quality. The cross-sectional area of ​​the material-reducing groove gradually decreases from the opening end to the bottom of the groove, facilitating smooth mold opening during cold plate bracket forming and preventing undercuts. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the cold plate support of this utility model;

[0034] Figure 2 for Figure 1 A structural diagram from another perspective;

[0035] Figure 3 for Figure 1 A schematic diagram of the dorsal side;

[0036] Figure 4 This is a schematic diagram of the battery pack housing assembly of this utility model;

[0037] Figure 5 This is an exploded view of the battery pack housing assembly and the cell stack of this utility model.

[0038] In the picture:

[0039] 1. Cold plate bracket; 10. Support body; 11. First support plate; 12. Second support plate; 13. Reinforcing rib; 101. Connecting plate; 101A. Through hole; 102. Slot; 103. Sloping section; 104. Material reduction groove; 105. Through hole; 106. Notch; 110. Fixing hole;

[0040] 2. Cold-rolled steel plate;

[0041] 3. Battery pack housing;

[0042] 4. Cell stack; 40. Cell. Detailed Implementation

[0043] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0044] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0045] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0048] like Figures 1-2 As shown, the cold plate bracket 1 of this embodiment is used to fix the cold plate 2 in the battery pack housing 3. It mainly includes: a support body 10 and a first support plate 11 and a second support plate 12 extending from both sides of the support body 10. The support body 10 is provided with a connecting part for connecting the cold plate 2; the first support plate 11, the second support plate 12 and the support body 10 are integrally formed; a plurality of reinforcing ribs 13 are provided between the first support plate 11 and the support body 10, and between the second support plate 12 and the support body 10. When the cold plate 2 is fixed in the battery pack housing 3 by the cold plate bracket 1, the first support plate 11 and the second support plate 12 abut against the inner wall of the battery pack housing 3 and are fixedly connected thereto; the connecting part is fixedly connected to the cold plate 2.

[0049] Compared to existing cold-plate supports using sheet metal brackets, in this embodiment, the cold-plate bracket 1 includes an integrally formed support body 10, a first support plate 11, and a second support plate 12. Multiple reinforcing ribs 13 are provided between the first support plate 11 and the support body 10, and between the second support plate 12 and the support body 10, resulting in high strength for the cold-plate bracket 1. Furthermore, when the cold-plate 2 is fixed in the battery pack housing 3 using the cold-plate bracket 1, the first support plate 11 and the second support plate 12 abut against the inner wall of the battery pack housing 3 and are fixedly connected to it, forming a large-area contact. The bottom surfaces of both the first support plate 11 and the second support plate 12 are on the same plane and simultaneously abut against the inner wall of the battery pack housing 3, while the cold-plate 2 is fixed to the support portion of the support body 10. Therefore, the cold-plate bracket 1 provides high support strength. When a new energy vehicle undergoes a side pole impact test, the battery pack housing 3 is subjected to a Y-direction load (i.e., the direction of the cold plate 2 / the width direction of the battery housing). The cold plate bracket 1 can support and protect the battery pack housing 3, effectively enhancing the Y-direction strength of the battery pack housing 3, that is, enhancing the Y-direction strength of the battery pack, which can meet the requirements of the side pole impact test for the driver and passenger.

[0050] Specifically, in this embodiment, the support body 10, the first support plate 11, the second support plate 12, and the reinforcing rib 13 are all made of aluminum alloy, and are formed into a single unit by die casting to ensure the structural strength of the cold plate bracket 1. Furthermore, the die casting process for the cold plate bracket 1 is simple and allows for mass production.

[0051] Both the first support plate 11 and the second support plate 12 are provided with fixing holes 110 for fasteners to pass through. The fixing holes 110 are round holes to ensure easy processing. In the illustration of this embodiment, the upper and lower ends of the first support plate 11 and the upper and lower ends of the second support plate 12 are provided with fixing holes 110 to ensure reliable fixation between the cold plate bracket 1 and the inner wall of the battery pack housing 3. During use, the first support plate 11 and the second support plate 12 are fixed to the inner wall of the battery pack housing 3 by four fasteners passing through the four fixing holes 110, and the cold plate bracket 1 is fixed to the inner wall of the battery pack housing 3. The fasteners can be rivets.

[0052] In this embodiment, the cold plate bracket 1 is fixedly connected to the cold plate 2 via a connecting part. Specifically, the connecting part includes two connecting plates 101 arranged at intervals and in parallel. A slot 102 is formed between the two connecting plates 101, into which the cold plate 2 can be inserted. The width of the slot 102 is slightly larger than the width of the cold plate 2 to ensure that the cold plate 2 can be inserted smoothly. The cold plate 2 in this embodiment is easy to assemble and disassemble. The two connecting plates 101 are provided with several through holes 101A for fixing the cold plate 2. The through holes 101A are round holes to ensure easy processing. Each of the two connecting plates 101 has a through hole 101A near its two ends, and the four through holes 101A are paired and coaxial. The cold plate 2 can be fixed to the two connecting plates 101 by two rivets.

[0053] Furthermore, multiple reinforcing ribs 13 are provided between one connecting plate 101 and the first support plate 11, and between the other connecting plate 101 and the second support plate 12. The provision of multiple reinforcing ribs 13 can effectively enhance the support strength of the two connecting plates 101 and the first support plate 11 and the second support plate 12, thereby enhancing the overall strength of the cold plate bracket 1. In this embodiment, both connecting plates 101 are perpendicular to the first support plate 11 and the second support plate 12. A ramp portion 103 is provided between the first support plate 11 and the connecting plate 101, and between the second support plate 12 and the other connecting plate 101. The reinforcing ribs 13 are provided on the ramp portion 103. The first support plate 11 and the connecting plate 101 are connected by the ramp portion 103, and the second support plate 12 and the other connecting plate 101 are connected by the other ramp portion 103. The ramp portion 103 itself can enhance the structural strength of the cold plate bracket 1, and the provision of reinforcing ribs 13 on the ramp portion 103 can further enhance the strength of the cold plate bracket 1. In particular, reinforcing ribs 13 are provided at both ends and in the middle of a connecting plate 101 and a first support plate 11, and reinforcing ribs 13 are provided at both ends and in the middle of another connecting plate 101 and a second support plate 12, which can effectively ensure the supporting strength of the cold plate bracket 1 in supporting the cold plate 2 and the battery pack housing 3.

[0054] Taking the orientation of the cold plate bracket 1 when it is installed in the battery pack housing 3 as a reference, the overall shape of the cold plate bracket 1 is symmetrical about the left and right axes. When the cold plate 2 is supported by the cold plate bracket 1, the strength of the left and right sides is the same, ensuring its support strength. A through hole 105 is provided in the middle of the support body 10, running from front to back. The through hole 105 divides the two connecting plates 101 into upper and lower connecting units. Each connecting unit is provided with a reinforcing rib 13 and a through hole 101A, ensuring that the cooling pipe can pass smoothly through the support body 10 while ensuring the strength of the connecting plate 101. The through hole 105 is a circular hole. A notch 106 is provided at the bottom of the support body 10. The notch 106 is located below the through hole 105. Both the through hole 105 and the notch 106 allow cooling pipes to pass through. In actual use, the liquid cooling pipes at each cold plate 2 are set with one inlet and one outlet. One of the through hole 105 and the notch 106 is used for the liquid cooling pipe that allows the coolant to enter, and the other is used for the liquid cooling pipe that allows the coolant to flow out. Setting the notch 106 instead of the through hole 105 at the bottom of the support body 10 can ensure structural strength and save raw materials for manufacturing the cold plate bracket 1.

[0055] Taking the direction of the cold plate bracket 1 when it is installed in the battery pack housing 3 as a reference, a fixing plate is provided on the top of the two connecting plates 101. A step is provided on the fixing plate. The fixing plate can be used to install other components in the battery pack to fix them to the cold plate bracket 1. In addition, the step can be provided to avoid the liquid cooling channel and to reserve a position for the riveting gun for easy operation.

[0056] like Figure 3 As shown, the cold plate bracket 1 of this embodiment has multiple material reduction grooves 104 on the side of the support body 10 away from the connecting part, and the openings of the material reduction grooves 104 face the side away from the connecting part. Furthermore, the cross-sectional area of ​​the material reduction grooves 104 gradually decreases from the opening end to the bottom of the groove. The material reduction grooves 104 not only reduce the amount of aluminum material required for die casting each cold plate bracket 1, thereby reducing the cost of each cold plate bracket 1, but also ensure uniform wall thickness of the cold plate bracket 1, improving the forming pass rate and thus ensuring forming quality. The purpose of the gradually decreasing cross-sectional area of ​​the material reduction grooves 104 from the opening end to the bottom of the groove is to facilitate smooth mold opening during die casting of the cold plate bracket 1, avoiding undercuts. With the direction of the cold plate bracket 1 when it is installed in the battery pack housing 3 as a reference, three material reduction grooves 104 are provided on the back side of the support body 10, at the end near the step and at the end near the notch 106. The material reduction grooves 104 vary with the shape of the slope 103. Among the three material reduction grooves 104 at each end, the longitudinal section of the middle material reduction groove 104 is approximately rectangular, and the longitudinal section of the two material reduction grooves 104 at both ends is approximately triangular.

[0057] like Figure 4 As shown, when the cold plate bracket 1 of this embodiment is applied to the battery pack housing 3 assembly, the battery pack housing 3 assembly mainly includes:

[0058] The battery pack housing 3, multiple cold plates 2, and multiple cold plate supports 1 in this embodiment;

[0059] Multiple cold plate supports 1 are evenly arranged in the battery pack housing 3 and are spaced apart along the length of the battery pack housing 3. One or both ends of the cold plate 2 are fixed to the inner wall of the battery pack housing 3 by the cold plate supports 1.

[0060] Optionally, one end of the cold plate 2 is fixed to the inner wall of the battery pack housing 3 by a cold plate bracket 1, and the other end is fixed to the other inner wall of the battery pack housing 3 by other means. Preferably, both ends of the cold plate 2 are fixed to the inner wall of the battery pack housing 3 by a cold plate bracket 1 of this embodiment, so as to maximize the strengthening effect of the cold plate bracket 1 on the Y-direction strength of the battery pack housing 3. The overall shape of the battery pack housing 3 is roughly rectangular, and each cold plate 2 is fixed to two opposite inner walls of the battery pack housing 3 along its length by two cold plate brackets 1 of this embodiment.

[0061] When a new energy vehicle undergoes a side pole impact test, it typically occurs in the Y direction of the battery pack. In this embodiment, the cold plate bracket 1 rests against the inner wall of the battery pack housing 3 on one side via the first support plate 11 and the second support plate 12, and on the other side it rests against the cold plate 2 via the support body 10, thus providing support and protection, ensuring the strength of the system in the event of a side pole impact, and thereby ensuring the safety performance of the battery pack.

[0062] like Figure 5 As shown, when the cold plate bracket 1 of this embodiment is applied to the battery pack, the battery pack mainly includes: a battery pack housing 3 assembly and a cell stack 4, the cell stack 4 being disposed in the battery pack housing 3; similarly, the battery pack housing 3 assembly includes: a battery pack housing 3, multiple cold plates 2 and multiple cold plate brackets 1 as shown in this embodiment; wherein, the multiple cold plate brackets 1 are evenly disposed in the battery pack housing 3 and are arranged at intervals along the length direction of the battery pack housing 3, and one or both ends of the cold plate 2 are fixed to the inner wall of the battery pack housing 3 by the cold plate bracket 1.

[0063] The cell stack 4 includes multiple cells 40, and cells 40 are provided between two adjacent cold plates 2. The cold plates 2 on both sides of the cells 40 are in contact with the cells 40. When the battery pack is working, the heat generated by the cells 40 can be carried away by the cold plates 2 in time to ensure that the cells 40 are at the optimal working temperature, thereby ensuring that the cell stack 4 and the battery pack are at the optimal working temperature.

[0064] In a battery pack, the tabs of the cell stack 4 are usually located in the Y direction of the battery pack. At the same time, side pole collisions of the vehicle usually occur in the Y direction of the battery pack. In order to protect the battery pack system from side pole collisions, the aluminum alloy die-cast cold plate bracket in this embodiment supports the battery pack housing 3 on one side and the cold plate 2 on the other side, so that when the battery pack system is involved in a side pole collision, it can provide support and protection in the Y direction.

[0065] In this design, the cold plate bracket 1 can effectively increase the Y-axis strength of the battery pack to meet the pole impact test requirements on both the driver and passenger sides, and it also has high strength.

Claims

1. A cold plate bracket for fixing a cold plate in a battery pack housing, characterized in that, include: A supporting body, wherein the supporting body is provided with a connecting part for connecting a cold plate; The first support plate and the second support plate extend from both sides of the main support body, and the first support plate, the second support plate and the main support body are integrally formed; a number of reinforcing ribs are provided between the first support plate and the main support body, and between the second support plate and the main support body. When the cold plate bracket fixes the cold plate in the battery pack housing, the first support plate and the second support plate abut against the inner wall of the battery pack housing and are fixedly connected thereto; the connecting part is fixedly connected to the cold plate.

2. The cold plate support according to claim 1, characterized in that, The supporting body, the first support plate, the second support plate, and the reinforcing rib are all made of aluminum alloy and are die-cast as a single piece.

3. The cold plate support according to claim 1, characterized in that, The connecting part includes two connecting plates arranged at intervals, a slot is formed between the two connecting plates for the cold plate to be inserted, and the two connecting plates are provided with a plurality of through holes for fixing the cold plate.

4. The cold plate support according to claim 3, characterized in that, Multiple reinforcing ribs are provided between one of the connecting plates and the first support plate, and between the other connecting plate and the second support plate.

5. The cold plate support according to claim 3 or 4, characterized in that, Both connecting plates are perpendicular to the first support plate and the second support plate; A ramp is provided between the first support plate and one of the connecting plates, and between the second support plate and the other connecting plate; The reinforcing ribs are installed on the slope.

6. The cold plate support according to claim 3, characterized in that, The support body has a through hole in the middle, which divides the two connecting plates into two connecting units, and each connecting unit is provided with the reinforcing rib. The supporting body has a notch; Both the through hole and the notch allow cooling pipes to pass through.

7. The cold plate support according to claim 1, characterized in that, Both the first support plate and the second support plate are provided with fixing holes through which fasteners can pass. The fasteners can pass through the fixing holes to fix the first support plate or the second support plate to the inner wall of the battery pack housing.

8. The cold plate support according to claim 1, characterized in that, The support body is provided with a plurality of material reduction grooves on the side away from the connecting part, and the openings of the material reduction grooves face the side away from the connecting part; The cross-sectional area of ​​the material reduction groove gradually decreases from the opening end to the bottom of the groove.

9. A battery pack housing assembly, characterized in that, include: Battery pack housing; Multiple cold plates and multiple cold plate supports as described in any one of claims 1-8; Multiple cold plates are disposed in the battery pack housing and are arranged at intervals along the length of the battery pack housing. One or both ends of the cold plates are fixed to the inner wall of the battery pack housing by the cold plate bracket.

10. A battery pack, characterized in that, include: The cell stack and the battery pack housing assembly as described in claim 9, wherein the cell stack is disposed in the battery pack housing; The battery cell stack includes multiple battery cells, and the battery cells are disposed between two adjacent cold plates.

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